JP2001248181A - Method for excavating and kneading and excavating and kneading machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for excavating and kneading and an excavating and kneading machine for forming a soil cement wall of long width with good operational efficiency. SOLUTION: Vertically elongated excavator members 20 and 30 are lowered along vertical guides 10 and 20 at initial positions to excavate a vertical hole of a predetermined depth and soil produced by this excavation and a cement type suspension are kneaded together, after which the excavator members are horizontally moved along a horizontal guide 50 to excavate the vertical hole in a horizontally elongate shape. Soil produced by this excavation and the cement type suspension are kneaded together, after which the excavator members are horizontally moved along the horizontal guide back to the initial positions. Thereafter, the excavator members are raised along the vertical guides back to the top of the ground and soil produced by the excavation of a construction site and the cement type suspension are kneaded together at an original position to form the soil cement wall.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a soil-cement wall (kneading) of soil and cement-based suspension produced by excavation of a land to be formed in situ in plumbing of water supply and sewerage, foundation work of a building, and the like. The present invention relates to an excavation kneading method and an excavation kneader for forming an earth retaining wall.

[0002]

2. Description of the Related Art An excavating kneader for forming a soil cement wall is disclosed, for example, in Japanese Patent No. 2942723. In such an excavating kneader, an endless excavating roller chain supported at the upper end by a driving sprocket and supported at the lower end by a driven sprocket and transferred by a driving device for driving the driving sprocket is moved down along the main column. The excavated ground is excavated by the excavation blade attached to the endless excavation roller chain, and the soil produced by excavation of the excavated ground and the cement-based suspension supplied through the supply pipe of the excavating kneader are used for excavation. The length of the wall from the cutting edge attached to the lower transfer side of the endless excavating roller chain to the cutting edge attached to the upper transfer side is a wall width and the width of the cutting edge is a substantially rectangular shape. A flat soil cement wall is formed.

[0003]

However, in the excavating kneader disclosed in the above-mentioned publication, one excavating operation (conveying process for transporting the excavating kneader to a desired position, and the main column is substantially perpendicular to the ground) The installation process, the endless excavation roller chain is lowered to excavate a vertical hole of a predetermined depth, and the vertical excavation kneading process for kneading the soil and cement suspension generated by this excavation, and the endless excavation roller chain is raised The soil cement wall formed by the return process of returning the soil excavator to the ground and the installation release process of releasing the installation so that the excavating and kneading machine can be transported). It is the length from the mounted excavation blade to the excavation blade mounted on the upper transfer side. For this reason, when forming the soil cement wall W having a long wall width, as shown in FIG. 32, it is necessary to repeat the excavation operation a plurality of times, and there is room for improvement in workability.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to address the above-mentioned problems, and a main object of the present invention is to provide a method for excavating and kneading a soil cement wall having a long wall width with high working efficiency. It is to provide a kneading machine.
The excavation and kneading method according to the present invention is an excavation and kneading method for kneading soil and cement-based suspension generated by excavation of a developed land in situ to form a soil-cement wall. At the initial position, the equipment is lowered along the vertical guide to excavate a vertical hole of a predetermined depth, and the vertical excavation kneading process for kneading the soil and cement suspension generated by the excavation, and after the vertical excavation kneading process A horizontal excavation kneading process of horizontally moving the excavating machine along a horizontal guide to excavate the vertical hole horizontally and kneading the soil and cement suspension generated by the excavation, and after the horizontal excavation kneading process A horizontal reversing step of moving the excavating equipment horizontally to the initial position along the horizontal guide and returning the excavating equipment, and after this horizontal reversing step, raising the excavating equipment along the vertical guide and returning the excavating equipment to the ground And a degree.

The excavating kneader according to the present invention is an excavating kneader for forming a soil cement wall by kneading, in situ, soil and a cement-based suspension generated by excavation of a lands. A vertical guide member and a horizontal guide member that are installed substantially vertically, and are vertically movably mounted to the vertical guide member, vertically moved by a vertical driving device, and horizontally movably mounted to the horizontal guide member. And a driven sprocket rotatably mounted on the lower end of the movable column, and a driven sprocket rotatably mounted on the upper portion of the movable column and rotated by a sprocket driving device. Driven sprocket, and an endless excavating roller chain having a cutting blade and being wound and transferred on the driving sprocket and the driven sprocket,
A supply pipe that has a discharge port that opens downward in proximity to the driven sprocket, is provided along the movable column, and is supplied with a cement-based suspension from a supply port provided at an upper end thereof. I have. In this case, the lateral guide member may be provided with a plurality of lateral guide rails for guiding the horizontal movement of the movable column in parallel, or the driven sprocket may be vertically attached to the lower end of the movable column via a damper mechanism. It is desirable to assemble movably.

[0006]

In the excavating and kneading method according to the present invention, the above-mentioned vertical excavating and kneading step, the above-mentioned horizontal excavating and kneading step, the above-mentioned horizontal returning step, and the above-mentioned vertical returning step are performed in order to perform a predetermined operation. Depth (height as a wall)
Can form a soil cement wall having a long wall width. By the way, in the excavating and kneading method according to the present invention, by increasing and decreasing the descending amount of the excavating equipment in the vertical excavating and kneading process, and by increasing and decreasing the horizontal movement amount of the excavating equipment in the above-described horizontal excavating and kneading process, A soil cement wall having an appropriate wall height and wall width can be efficiently formed by a series of the same operations including the above steps.

Further, in the excavating kneader according to the present invention, the driving sprocket is driven to rotate by the sprocket driving device in a state where the vertical guide member and the horizontal guide member are installed at desired positions (initial positions) of the ground. The endless excavation roller chain is transported, and the movable column is lowered by the vertical drive device along the vertically installed vertical guide member. When the liquid is pumped, vertical excavation of the ground is performed by the excavation blade, and the soil and cement-based suspension generated by the vertical excavation are stirred and kneaded to produce unsolidified soil cement.

Further, after a predetermined amount of vertical excavation is completed, the movable support is moved horizontally along a horizontal guide member by a horizontal drive device in a state where the endless excavation roller chain is transferred, and the horizontal excavation by the excavation blade is performed. When the cement-based suspension is pumped into the supply pipe at the same time, the excavation blade performs horizontal excavation of the ground, and the soil and cement-based suspension produced by this lateral excavation are stirred and kneaded to obtain unsolidified soil cement. Is made.

After a predetermined amount of lateral excavation is completed, the pumping of the cement suspension is stopped, and the movable support is moved along the lateral guide member by the lateral driving device to move horizontally to the initial position. Then, when the movable column is lifted by the vertical driving device, the above-mentioned soil cement is mainly stirred and kneaded by the excavation blade in accordance with the horizontal movement and the upward movement of the movable column, so that it is made uniform. At this time, it is also possible to replenish the cement-based suspension by appropriately feeding it under pressure. Also, when the rotation of the drive sprocket by the sprocket drive device is stopped at the time when all the excavating blades rise to the ground to stop the transfer of the endless excavating roller chain, an unsolidified soil cement wall is formed in the ground. . It is also possible to stop the rotation of the driving sprocket by the sprocket driving device when the predetermined amount of lateral excavation is completed.

By the way, in the excavating kneader according to the present invention, by setting the vertical length of the vertical guide member and the horizontal length of the horizontal guide member appropriately, the soil cement having an appropriate wall height and wall width can be obtained. The wall can be formed with a high efficiency in the series of operations described above. Further, in the excavating and kneading machine of the present invention, when a plurality of lateral guide rails for guiding the movable column in the horizontal direction are provided in parallel on the lateral guide member, the lateral guide member is lower by using the upper lateral guide rail ( A (shallow) soil cement wall can be formed, and a high (deep) soil cement wall can be formed using the lower lateral guide rails. Further, in the excavating kneader of the present invention, when the driven sprocket is vertically movably assembled to the lower end of the movable support via the damper mechanism, it is possible to buffer the impact acting on the excavating blade during excavation. Thus, damage to the excavation blade can be prevented.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. 1 to 3 show an excavating kneader 100 according to the present invention mounted on a heavy equipment A having an endless track, and the excavating kneader 100 includes a horizontal pulling guide 50 (FIG. 3).
(See FIG. 1), and can be transported in a state of being laid down on the heavy equipment A or in an upright state. The excavating and kneading machine 100 includes a main column 10 attached to a frame A1 of the heavy equipment A, a movable column 20 movably attached to the main column 10, an endless excavating roller chain 30, a supply pipe 41, and the like. Main pillar 1 installed almost vertically on the ground as shown in
The horizontal pulling guide 50 is removably mounted on the ground and is installed substantially vertically on the ground. Note that an outrigger B is attached to the rear of the frame A1 of the heavy equipment A.

The main column 10 can be raised and lowered at the end of the frame A1 of the heavy equipment A via a bracket assembly 60 (details omitted) and can be tilted in the left-right direction of FIG. 3 and rotated around the longitudinal axis S of FIG. It is installed so as to be able to be installed substantially perpendicularly to the ground G by an outrigger B attached to the lower end. In addition, the frame A1 of the main pillar 10
Of the main column 10 with respect to the frame A1 in the left-right direction is made by a hydraulic cylinder C2, and the rotation of the main column 10 around the longitudinal axis S with respect to the frame A1 is made by a hydraulic cylinder C3. And each hydraulic cylinder C
The operations of C1, C2 and C3 can be controlled in the operation room of the heavy equipment A.

2 and FIGS. 4 to 5
, A pair of left and right guide rails 12 for moving the movable column 20 in the vertical direction along the main column 10.
And a pair of left and right guide arms 13
Are assembled together with a bracket 14 and a pair of left and right connecting arms 15. The pair of left and right guide rails 12
It is fixed to the front side of the main column 10 and extends from the upper portion to the lower end of the main column 10 as shown in FIGS. A stopper 12a (see FIG. 4) for regulating the pressure is provided.

As shown in FIGS. 4 and 5, the pair of left and right guide arms 13 are rotatably (openably and closably) mounted on the bracket 14, and are rotated by connecting pins 16 which can be inserted and removed from above. The movement is restricted, and is vertically movably attached to each guide rail 12 of the main pillar 10 via a pair of left and right connecting arms 15 integrally attached to the bracket 14. In addition, each guide arm 1
3 is opened and held as shown by the imaginary line in FIG. 5 so that the movable column 20 is disengaged from each guide rail 21.

As shown in FIGS. 1 to 6, the movable column 20 is removed from a pair of left and right guide rails 12 of the main column 10 by a pair of left and right guide arms 22 provided on the upper back surface, and the upper part is removed. It is vertically movably mounted on a pair of left and right guide arms 13 mounted on the main column 10 by a pair of left and right guide rails 21 provided on both rear sides in the longitudinal direction, and can be controlled in the operation room of the heavy equipment A. It is configured to be moved up and down by a support driving device 70. Each guide arm 22 is rotatably mounted on the movable column 20, and engages with each guide rail 12 of the main column 10 by being held in a solid line state as shown in FIG. The main pillar 10 is released from engagement with each guide rail 12 by being opened and held in a virtual line state. As shown in FIGS. 2 and 3 and FIGS. 7 to 9, a cover 29 that covers the upper end of the endless excavating roller chain 30 is detachably attached to the upper portion of the movable support 20.

As shown in FIGS. 2 and 4, the column driving device 70 includes a pulling wire 71, a winch 72 for winding and rewinding the wire 71, a pulling wire 73, and a winch 74 for winding and rewinding the wire. The movable column 20 can be moved downward by winding the wire 73 at the winch 74 and unwinding the wire 71 at the winch 72, and can also wind the wire 71 at the winch 72 and winch By unwinding the wire 73 at 74, the movable column 20 can be moved upward. The pulling wire 71 is fixed at one end to the upper portion of the main column 10 and is attached to the upper end of the movable column 20 and the pulley P1 attached to the upper end of the main column 10.
2 and 3 are wound around a winch 72 via a roller R1 mounted on the back of a sleeve 19 mounted on an intermediate portion between the main pillar 10 and the main pole 10, and a pulling wire 73 is provided at one end on the upper part of the movable support 20. It is wound around the winch 74 via a pulley P4 which is fixed and assembled to the lower part of the main column 10.

As shown in FIGS. 3 and 7 to 12, the endless excavating roller chain 30 is an excavating means for excavating the ground, carrying out the soil, and making a hole, and for stirring and kneading the soil cement. And many connecting pins 3
1 and rollers 32, a large number of link plates 33 attached to the connecting pins 31 at both ends of the rollers 32, and a large number of excavating blades 34 attached to the link plates 33 via a base plate 35 (see FIG. 11). And so on. In addition, although many excavation blades 34 are shown in each drawing such that all eight rows are provided in one base plate 35, actually, three to five continuous base plates are set as one set. Each of these base plates is provided with two to three digging blades 34 in an appropriate layout, and can be implemented by appropriately changing the number and layout of digging blades 34 provided in each base plate.

Further, the endless excavating roller chain 30 comprises:
The sprocket driving device 8 is disposed so as to surround a portion excluding the upper portion of the movable support 20 from the left and right, and is rotatably mounted on the upper portion of the movable support 20 in an axially overlapping two sheets.
A pair of drive sprockets 23 driven to rotate by zero
(See FIGS. 7, 8 and 9) and a pair of driven sprockets 24 (FIGS. 7, 10 and 10) rotatably mounted at the lower end of the movable column 20 via a rotary shaft 25 at a predetermined axial gap. 11).

The rotary shaft 25 is vertically movably mounted on a long hole 20a (see FIG. 10) provided at the lower end of the movable support 20, and is supported by a damper mechanism 90 mounted in the movable support 20. Have been. The damper mechanism 90 is
A spring 91 for urging the rotating shaft 25 downward with a predetermined mounting load is provided, which automatically adjusts the tension of the endless excavating roller chain 30 and drives the driven sprocket 24 from the lower end of the endless excavating roller chain 30. When an excessive load acts upward on the rotating shaft 25 via the shaft, these upward movements are allowed and the impact on the excavation blade 34 is buffered.

The sprocket driving device 80 is a motor with a speed reducer that can be controlled in the operation room of the heavy equipment A.
As shown in FIG. 9 to FIG. 9, the drive sprocket 23 is coaxially mounted on the upper part of the movable support column 20 so as to rotate the drive sprocket 23. By rotating the endless excavating roller chain 30 in the clockwise direction shown in FIG.
Is transported in the direction of the arrow.

The supply pipe 41 is shown in FIG. 7, FIG. 8, FIG.
As shown by reference numeral 0, a discharge port 41a is provided along the movable support column 20, is disposed in the space between the driven sprockets 24, and opens downward, and is provided at the upper end. The cement-based suspension is fed under pressure from the supply port 41b. The discharge port 41a is displaced by a predetermined amount on the lower transfer side of the endless excavation roller chain 30, as shown in FIGS. In addition to the supply pipe 41, the movable support 20 has a second supply pipe 42 (a pipe for supplying air to improve stirring and kneading when the cement suspension is pumped through the supply pipe 41). ) Is provided, and the discharge port 42a of the supply pipe 42 is disposed so as to face the discharge port 41a of the supply pipe 41, and the supply port 42b of the supply pipe 42 is provided in the same manner as the supply port 41b of the supply pipe 41. Have been.

As shown schematically in FIG. 3 and in detail in FIGS. 13 to 18, the horizontal pulling guide 50 is a vertical wall-shaped guide removably mounted on the left side of the main pillar 10 in FIG. A frame 51 and a base plate 52 installed on the ground G
, A first stay 53a, a second stay 53b and an outrigger 53c for integrating the guide frame 51 and the base plate 52, and a horizontal hydraulic cylinder for horizontally moving the movable column 20, the endless excavating roller chain 30, and the like. And a connector 55 and the like.

The guide frame 51 is shown in FIGS.
As shown in FIG. 7, the movable bracket 20 is detachably attached to the connecting bracket 17 integrally provided below the main pillar 10 using a plurality of bolts and nuts, and is used when the movable pillar 20 is moved in the horizontal direction. Two sets of three guide rails 5
1a, 51b, 51c (see FIG. 3) and a mounting portion 51d for mounting the horizontal hydraulic cylinder 54 (see FIG. 18).
And a guide angle 51 for attaching the connector 55
e (see FIG. 18). Three guide rails 5
1a, 51b, 51c are arranged in parallel and at equal intervals, and when moving the movable column 20, the endless excavating roller chain 30, and the like in the horizontal direction, the guide rail 5 is provided.
1a, 51b or guide rails 51b, 51c are used as one set.

The base plate 52 includes a plurality of fixed piles 56.
(See FIGS. 13 and 15) and a plurality of weights 57 (see FIGS. 13 and 14) so as to be immovably fixed to the installation surface, and are also pressed against the ground G by the outrigger 53 c. It has become. First stay 5
The 3a and the second stay 53b are provided to make the guide frame 51 substantially perpendicular to the installation surface, and are configured to be adjustable in length.

The horizontal pulling hydraulic cylinder 54 is mounted on the mounting portion 51d of the guide frame 51 as shown in FIGS.
5 and a connecting pin 27 so as to be detachably connected to one of two pairs of upper and lower connecting arms 26a and 26b (see FIG. 9) assembled to the upper back of the movable column 20. In the state shown in FIGS. 2 and 3, the rod end of the horizontal hydraulic cylinder 54 is connected to the connector 5 as shown in FIG.
5 and the upper side via the connecting pin 27 (the side where the wall height is increased)
Is connected to the connecting arm 26a.

The connector 55 includes a horizontal pulling hydraulic cylinder 54.
As shown in FIG. 18, it is mounted on the guide angle 51e of the guide frame 51 so as to be movable in the horizontal direction corresponding to the mounting position.
Is inseparably connected to the tip of the rod. The connector 55 is selectively connected to a connection hole provided in the connection arm 26a or 26b of the movable column 20 via a connection pin 27 which can be inserted and removed from above through a connection hole 55a or 55b provided at one end or the other end. It is supposed to be.

The work process in which the movable column 20 moves up and down along the main column 10 (vertical excavation kneading process and vertical return process).
As shown in FIG. 19, the rail blocks 18a and 18b of the four divided rail blocks 18a to 18d are allowed to move up and down the guide roller 28a attached to the upper rear surface of the movable support 20. The connecting bracket 17 of the main pillar 10 is detached from the fixed position, and is temporarily fixed to the position shown in the figure using a connecting pin 18e that can be inserted and removed from above, and the rail block 18c is connected to the connecting bracket 1 by the rail block 18c.
7 has been removed from its home position and stored. The rail block 18d is fixed to the front surface of the main pillar 10.

In the vertical excavation kneading process and the vertical return process, as shown in FIG. 20, the hydraulic cylinder 28c is driven forward and backward by a hydraulic cylinder 28c, which is mounted on the upper rear surface of the movable column 20 in correspondence with the guide roller 28a. The holding roller 28b is retracted. In addition, as shown by the solid lines in FIG.
The two guide rails 21 of the main column 10 are engaged with the two guide rails 21 of the main column 10 as shown by solid lines in FIG.

On the other hand, the movable support 20 is connected to the connecting bracket 17.
Rail blocks 18a to 18 to be assembled at fixed positions
4, FIG. 9, FIG. 9, FIG. 9, FIG. 9, and FIG. 16, FIG. 17, FIG. 21, FIG. 22, etc., both guide rails 51b, 51c (or 51
a, 51b).
a, 18b, and 18c are assembled using the connecting pin 18e, and the two guide rails 51 on the guide frame 51 are provided.
b, 51c (or 51a, 51b) in a straight line. The rail block 18a is assembled by inserting from the right to the left in FIG. 21 and inserting the coupling pin 18e, and the rail block 18b is slid to the right in FIG. 21 and inserting the coupling pin 18e. The rail block 18c is assembled and inserted from below (front) to above (rear) in FIG.
It is assembled by inserting e.

In the horizontal excavation kneading step and the horizontal return step, each guide roller 28a and each holding roller 28a
As shown in FIGS. 16 and 17 and FIGS. 21 and 22, b is rollably engaged with the rail portions of the rail blocks 18a to 18d or the guide rails 51b and 51c. Further, the two guide arms 13 assembled to the main column 10 are opened to disengage with the two guide rails 21 of the movable column 20 as shown by the phantom line in FIG. The assembled two guide arms 22 are opened as shown by the phantom line in FIG.
2 has been disengaged.

In the excavating kneader 100 of the present embodiment configured as described above, the main column 10 with the movable column 20 lifted in advance is moved to the heavy machine A at a desired position on the land where the soil cement wall W is to be applied. And transport each hydraulic cylinder C
1, C2 and C3 and the respective outriggers B are operated so as to be installed substantially vertically, and the horizontal pulling guide 50 is assembled to the connecting bracket 17 of the main pillar 10, so that the first stay 53a, the second stay 53b and the outrigger The guide frame 51 is set substantially vertically by 53c or the like.

In this state, the sprocket driving device 8
0, the driving sprocket 23 is driven to rotate to transfer the endless excavating roller chain 30 and the movable column 20 is lowered by the column driving device 70 so that the excavating blade 34
When the cement-based suspension is pumped into the supply pipe 41 at the same time as the excavation by the excavation starts, the ground is excavated by the excavation blade 34, and the soil and the cement-based suspension generated by the excavation are removed by the excavation blade 34. The unsolidified soil cement is produced by stirring and kneading. The vertical excavation kneading process is performed until the movable hole 20 and the endless excavating roller chain 30 descend along the main column 10 by a predetermined amount, so that a vertical hole having a predetermined depth is excavated.

After the vertical hole having the predetermined depth is excavated, the transfer of the endless excavation roller chain 30 and the pumping of the cement suspension are stopped, and the connection bracket 17 on the main column 10 is stopped. The rail blocks 18a to 18c are assembled at fixed positions of the guide frames 51 and 51c of the guide frame 51 (or 51c).
a, 51b), and the guide rollers 28 are adjusted by adjusting the vertical position of the movable column 20 and projecting the holding rollers 28b by the hydraulic cylinders 28c.
a and each holding roller 28b is connected to each rail block 18a-
18d, and the connector 55 is connected to the connecting arm 26a (or 26b) of the movable column 20 via the connecting pin 27, as shown in FIGS. 2 to 4 and FIGS. Become like

For this reason, the drive sprocket 23 is rotationally driven by the sprocket drive device 80 to transfer the endless excavating roller chain 30 and the cement-based suspension under pressure. When it is moved in the horizontal direction, as shown in FIG. 31, excavation is performed by the excavation blade 34 to make the vertical hole of the ground horizontally long, and the soil and cement suspension generated by the excavation are stirred and kneaded by the excavation blade 34. To form unsolidified soil cement. In this horizontal excavation kneading process, the movable support 20 and the endless excavation roller chain 30 and the like are moved along the guide rails 51b, 51c (or 51a, 51b) of the guide frame 51 by a predetermined amount (to the position indicated by the imaginary line in FIG. 31). It is moved in the horizontal direction until a vertical hole having a predetermined depth and a predetermined length is excavated. In order to facilitate the horizontal movement of the movable column 20 during the horizontal excavation kneading process, it is possible to remove the pulley P1 from the movable column 20 and to remove the pull-down wire 73 before the start of the horizontal excavation kneading process.

During the horizontal excavation kneading process, when the state shown in FIG. 23 (first stroke) is changed to the state shown in FIG. Extending and connecting the connector 55 and the connecting arm 26a (or 26b) with the connecting pin 27 as shown in FIG. 25, and changing the state shown in FIG.
27 (fourth stroke), the connecting pin 27 is removed, and the rod of the hydraulic cylinder 54 is extended.
27, the operation of connecting the connector 55 and the connection arm 26a (or 26b) with the connection pin 27 as shown in FIG.
The operation of shifting from the state (fifth stroke) to the state of FIG. 28 (sixth stroke) is performed. In the state of FIG. 28, the rod tip, the connector 55, and the connecting pin 27 are as shown in FIG. 29, and the horizontal pulling hydraulic cylinder 54 and the connecting arm 26a (or 26b) are as shown in FIG. It has become. The above operations are performed in a state where the transfer of the endless excavation roller chain 30 is stopped and the pressure feed of the cement suspension is stopped.

After the horizontal excavation and kneading process, the operations opposite to the above-mentioned operations in the horizontal excavation and kneading process are performed in a state where the pumping of the cement suspension is stopped. Movable strut 20 and endless excavating roller chain 3
0 and the like are moved in the horizontal direction to the initial position shown in FIGS. 2 and 3, and the reversing process is completed. Further, after the horizontal return process, after the operation performed in reverse to the operation performed when shifting from the vertical excavation kneading process to the horizontal excavation kneading process is performed, the movable strut 20 and the endless excavation roller chain 30 and the like are moved. A vertical return stroke is performed by the support driving device 70 to return the ground to the ground by ascending along the main pillar 10. At this time, it is also possible to replenish the cement-based suspension by appropriately feeding it under pressure.

Further, when the driving of the drive sprocket 23 by the sprocket driving device 80 is stopped at the time when all the excavating blades 34 have risen to the ground, and the transfer of the endless excavating roller chain 30 is stopped, the unsolidified ungrounded excavating roller chain 30 is placed in the ground. A soil cement wall W is formed. A desired strength distribution can be obtained by burying H-section steel as a stress-carrying material at appropriate intervals in the unsolidified state of the soil cement in the soil cement wall W formed as described above, if necessary. The retaining wall can be constructed efficiently and economically, and one side of the retaining wall is exposed by digging a desired amount of one side of the retaining wall after solidification of the soil cement.

As is clear from the above description, when the excavating kneader 100 of this embodiment is used, the above-described vertical excavating kneading process, the above-described horizontal excavating kneading process, the above-described horizontal returning process, and the above-described vertical returning process. The steps can be sequentially executed, and a soil cement wall W having a predetermined depth (height as a wall) and a long wall width can be formed with a high efficiency in a series of operations including the above steps.

Further, in the excavating kneader 100 of the present embodiment, two pairs of upper and lower connecting arms 26a,
26b are provided, and three guide rails 51a, 51b, 51c are arranged on the guide frame 51 in parallel and at equal intervals, and the guide rails 51a, 51b or the guide rails 51b, 51c are used as one set. So that the upper guide rail 5
A low (shallow) soil cement wall can be formed by using the lower connecting arms 26a and the lower connecting arm 26b, and a high (deep) soil is formed by using the lower guide rails 51b and 51c and the upper connecting arm 26a. A cement wall can be formed. Further, in the excavating kneader 100 of the present embodiment, the driven sprocket 24 is vertically movably mounted to the lower end of the movable column 20 via the damper mechanism 90, so that the shock acting on the excavating blade 34 during excavation is buffered. And the damage of the excavation blade 34 can be prevented.

In the above embodiment, the horizontal pulling hydraulic cylinder 54, which has a short stroke length and is capable of compactly forming the horizontal pulling guide 50, is used. However, the present invention is performed using another horizontal driving device. It is also possible.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a drilling kneader according to the present invention.

FIG. 2 is a side view in the middle of forming a soil cement wall using the excavating kneader shown in FIG.

FIG. 3 is a front view of the state shown in FIG. 2;

FIG. 4 is an enlarged side view of a main part of FIG. 2;

FIG. 5 is a view showing a relationship between a main column and a movable column at a position indicated by an arrow 5 in FIG. 4;

6 is a diagram showing a relationship between a main column and a movable column at a position indicated by an arrow 6 in FIG. 4;

FIG. 7 is a front view of the movable column and the endless excavating roller chain shown in FIGS. 2 and 3;

FIG. 8 is an enlarged front view of the upper part of FIG. 7;

FIG. 9 is an enlarged side view of the upper part of FIG. 7;

FIG. 10 is an enlarged front view of the lower part of FIG. 7;

FIG. 11 is a lower enlarged side view of FIG. 7;

FIG. 12 is a partially enlarged side view of a lower portion of FIG. 7;

FIG. 13 is a partially enlarged front view of the horizontal pulling guide shown in FIG. 3;

14 is a partially enlarged side view of the horizontal pulling guide shown in FIG.

FIG. 15 is a plan view of the horizontal pulling guide shown in FIG.

FIG. 16 is a cross-sectional plan view showing the relationship between the guide rail and the guide roller from above the central guide rail shown in FIG. 3;

FIG. 17 is a cross-sectional plan view showing a relation between the guide rail and the holding roller from an intermediate portion of the central guide rail shown in FIG. 3;

FIG. 18 is a cross-sectional plan view showing the relationship between the horizontal hydraulic cylinder and the movable support shown in FIG. 3, and the like.

FIG. 19 is an enlarged plan view showing a relation between a guide roller and a rail block when the movable support is moved up and down along the main support.

20 is an enlarged side view illustrating a state of the guide roller and the holding roller in the state illustrated in FIG. 19;

FIG. 21 is an enlarged plan view showing a relationship between a guide roller and a rail block when the movable support is moved in a horizontal direction by a horizontal pulling hydraulic cylinder.

FIG. 22 is an enlarged side view illustrating a state of a guide roller and a holding roller in the state illustrated in FIG. 21;

FIG. 23: FIG. 1 in a first step in a side excavation kneading step
FIG.

FIG. 24 is a diagram showing a second excavation kneading process in FIG.
FIG.

FIG. 25: FIG. 1 in the third step in the horizontal excavation kneading step
FIG.

FIG. 26 is a diagram showing a fourth excavation kneading process in FIG.
FIG.

FIG. 27 is a view showing a fifth excavation kneading process in FIG.
FIG.

FIG. 28 is a diagram showing a sixth excavation kneading process in FIG.
FIG.

FIG. 29 is a vertical sectional side view showing a relationship between a rod tip, a connector, a connecting pin, and the like in the state shown in FIG. 28;

30 is a side view showing the relationship between the horizontal pulling hydraulic cylinder and the connecting arm of the movable column in the state shown in FIG. 28.

FIG. 31 is a diagram showing a process in which a soil cement wall is formed by the excavating and kneading machine shown in FIGS. 2 and 3, and FIG.
Fig. 3 is a longitudinal front view along the soil cement wall, and Fig. 3 (b) is a plan view.

FIG. 32 is a diagram showing a process in which a soil cement wall is formed by the excavating kneader disclosed in Japanese Patent No. 2942723;
(A) is a longitudinal front view along the soil cement wall, and (b) is a plan view.

[Explanation of symbols]

100: excavating kneader, 10: main column, 20: movable column, 2
3 ... drive sprocket, 24 ... driven sprocket, 30
... Endless excavating roller chain, 34 ... Excavating blade, 41 ... Supply pipe, 50 ... Horizontal pulling guide, 70 ... Post drive unit, 80
... Sprocket drive, 90 ... Damper mechanism, W ... Soil cement wall.

Claims (4)

[Claims] An excavation and kneading method for kneading soil and a cement-based suspension generated by excavation of a ground at an in-situ position to form a soil-cement wall. In the vertical excavation kneading step of lowering along the vertical guide to excavate a vertical hole of a predetermined depth and kneading the soil and cement suspension generated by this excavation, and after the vertical excavation kneading step, the excavating equipment A horizontal excavation and kneading process for horizontally excavating the vertical hole by horizontally moving along the horizontal guide and kneading the soil and cementitious suspension generated by the excavation, and after the horizontal excavation and kneading process, the excavating machine A digging method comprising: a horizontal reversing process of moving the excavating machine along the vertical guide and returning the excavating equipment to the ground after the horizontal reversing process of moving the excavating machine along the vertical guide and returning the excavating equipment to the ground after the horizontal reversing process. Shaving kneading method. 2. A drilling and kneading machine for forming a soil cement wall by kneading, in situ, soil and a cement-based suspension generated by excavation of a ground, and a vertical guide member installed substantially vertically on the ground. And a horizontal guide member, which is vertically movably mounted to the vertical guide member, vertically moved by a vertical drive device, and is horizontally movably mounted to the horizontal guide member, and is horizontally moved by a horizontal drive device. A movable sprocket, a driven sprocket rotatably assembled at the lower end of the movable strut, a driving sprocket rotatably assembled on the upper part of the movable strut and driven to rotate by a sprocket driving device, and a digging blade. An endless excavating roller chain that is wound and transferred on the driving sprocket and the driven sprocket, and opens downward in proximity to the driven sprocket. And a supply pipe disposed along the movable column and having a discharge port through which a cement-based suspension is pressure-fed from a supply port provided at an upper end. 3. The excavating and kneading machine according to claim 2, wherein a plurality of horizontal guide rails for guiding the movable column in a horizontal direction are provided on the horizontal guide member in parallel. 4. The excavating and kneading machine according to claim 2, wherein the driven sprocket is mounted on a lower end of the movable support so as to be vertically movable via a damper mechanism.