JP2007239340A - Foundation material for construction - Google Patents

Abstract

An object of the present invention is to provide a construction base material that ensures rigidity.
A construction base material according to the present invention includes a plurality of rod-shaped first buckling members 9 arranged on the same radius, a pair of first plates 10 for fixing both ends thereof, and a pair of first plates. A plurality of first buckling members 8 each having a female screw fixed to one side and formed with a female screw, and a plurality of rod-shaped second buckling members 13 are arranged on the radius, and a pair of both ends thereof are fixed. A second buckling member comprising a second plate 14, provided with a groove 14 c that opens on the outer peripheral side of the second plate and in which the first buckling material is installed, and whose axial length is shorter than that of the first buckling member. 12 and a rod 2 that penetrates through the first and second buckling members and is provided with a male screw 2c that engages with the female screw member on the outer periphery thereof.
[Selection] Figure 1

Description

  The present invention relates to an improvement of a building foundation material for building a foundation of a structure.

As a conventional construction base material, there is a technique described in Patent Document 1. This consists of a sleeve in which a plurality of small tongue-shaped pieces that have been able to be buckled by inserting a plurality of axial kerfs from the tip or near the tip, and a tip penetrating the sleeve. A construction material comprising: a rod provided with a head for buckling the tongue-shaped piece; and a protective pipe for connecting the tip to the rear end of the sleeve so as to be freely separated and removably covering the outer periphery of the rod. Corresponding to the head, a first sleeve having a rear end corresponding to the front end of the protective pipe, and a double fit on the outer periphery of the first sleeve so that each tongue-like piece of the first sleeve faces the groove, The head includes a second sleeve having a front end corresponding to the head and a rear end corresponding to the front end of the protective pipe at a smaller interval than the first sleeve.
Japanese Patent No. 2101920

  However, in the prior art, since two sleeves having different diameters are arranged on the same axis, the thickness of each sleeve is less flexible, the thickness of the sleeve is reduced, the sleeve is buckled, and the "<" shape is formed. However, there is a problem that the rigidity of the sleeve is insufficient when it is bent and the desired shape is not spread when the ground is hard.

  An object of the present invention is to provide a construction base material that solves the lack of rigidity of a sleeve.

  The construction base material of the present invention includes a rod-shaped first buckling material, a plurality of the first buckling materials arranged on the same radius, a pair of first plates for fixing both ends, and the pair of first buckling materials. A first buckling member composed of a female screw member fixed to one of the plates and formed with a female screw, a rod-shaped second buckling member, and the second buckling member is disposed by the first buckling member. A plurality of plates arranged on substantially the same radius as the formed radius, and a pair of second plates for fixing both end portions thereof. The second plate has an opening on the outer peripheral side between the fixing positions of the second buckling material. A second buckling member provided with a groove in which the first buckling member is movably installed, and having a predetermined axial length shorter than the first buckling member; and the first and second buckling members. And a rod provided with a male screw threadedly engaged with the female screw member on the outer periphery thereof, and the first and second buckling members are the first The first buckling member is formed so as to buckle to the outer peripheral side while being fixed to the rate or the second plate, restricts the other axial movement of the first plate of the first buckling member, and the rod of the first plate It is characterized in that the first buckling member and the second buckling member are buckled in this order by moving from one side to the other.

  The base material for construction of the present invention can increase the cross-sectional area of each buckling material and secure rigidity by arranging the first and second buckling materials in the same radius. Thereby, it can be set as the predetermined "<"-shaped buckling shape in the natural ground. Further, since the axial lengths of the first buckling member and the second buckling member are made different, by delaying the buckling start time of the second buckling material from the buckling start time of the first buckling material, Compared with the case where the first and second buckling materials are buckled simultaneously, the load required for buckling can be reduced.

  The construction base material 1 of the present invention will be described with reference to the configuration diagram shown in FIG. 1 and the cross-sectional view shown in FIG.

  The construction base material 1 includes a bottomed hollow cylindrical rod 2 and a primary buckling member 8 and a second buckling member 12 which are arranged coaxially with the rod.

  The rod 2 is formed with a male screw 2a having a predetermined length on the outer peripheral portion on the bottom side, and a nut 6 for rotating the rod is fixed to an end portion on the opening side. A through hole 2b that penetrates the wall of the rod 2 in the radial direction is formed at a predetermined position, and high-pressure air or grout supplied from the outside into the rod 2 is supplied from the through hole 2b to the first and second buckling members. Supply to the vicinity of 8,12. The length of the male screw 2a is such that after the first and second buckling members 8 and 12 are buckled, the rod 2 is rotated so that the through hole 2b is positioned at a predetermined position with respect to the first and second buckling members 9 and 13. This is the length necessary to move to (see FIGS. 2 (3) and (4)). A plurality of through-holes 2b are provided, and their arrangement is offset by a predetermined length in the axial direction so that the supply of high-pressure air or grout is efficient, and they are arranged at equal intervals when viewed from the axial direction. It is preferable.

  The first buckling member 8 includes a predetermined number of rod-shaped first buckling members 9, a pair of first plates 10 for installing a plurality of the first buckling members 9 on the same radius at predetermined intervals, The nut 2 is fixed to the plate 2 and is engaged with the male screw 2a of the rod 2. The rod 2 passes through the center of the pair of first plates 10 on which the first buckling member 9 is installed. By screwing into the male screw 2a, the first buckling member 8 moves in the axial direction as the rod 2 moves in the axial direction. In addition, the 1st buckling material 9 should just be made into the material and shape which can ensure sufficient rigidity with the steel material of a round cross section or a square cross section, for example.

  FIG. 3 is a configuration diagram showing the shape of the first plate 10 on which the first buckling material 9 is installed. The 1st plate 10 is formed in disk shape, and the through-hole 10a which the rod 2 penetrates in the center part is formed. Further, the plate is formed with through-holes 10b for installing a plurality of first buckling members 9 on the same radius at a predetermined interval (72 ° interval in the figure). A first plate 10 is installed at each end of the first buckling material 9, and the first plate 10 and the first buckling material 9 are fixed by welding or the like.

  Returning to FIG. 2, when the first buckling member 9 is loaded in the axial direction from the state where it is attached to the pair of plates 10, the first buckling member 9 starts from the substantially central portion of the first buckling member 9 in the outer diameter direction. Notches 11a and 11b are provided at predetermined positions so as to buckle. In the figure, it is formed at a total of three places, one place (notch 11a) inside the substantially central portion and one place (notch 11b) outside the vicinity of the first plate 10, respectively. By forming the notches 11a and 11b in this manner, the first buckling material 9 is buckled outward from the central portion in a “<” shape. Further, the first buckling member 9 may be formed in a straight line shape, but is bent from a predetermined position near the end (the position of the notch 11b) and fixed to the pair of first plates 10. By making the shape gradually convex outward from the end portion to the central portion (for example, formed with an inclination of about 1 °), the buckling form becomes a “<” shape. You may comprise as a shape which promotes buckling.

  The second buckling member 12 includes a predetermined number of rod-shaped second buckling members 13 and a pair of second plates 14 for installing the second buckling members 13 on the same radius at predetermined intervals. The In addition, the 2nd buckling material 13 should just be made into the material and shape which can ensure sufficient rigidity with the steel material of a round cross section or a square cross section, for example.

  FIG. 4 is a configuration diagram showing the shape of the second plate 14. The 2nd plate 14 is formed in disk shape, and forms the through-hole 14a which the rod 2 penetrates in the center part. The second plate 14 is formed with through holes 14b for installing the second buckling member 13 at a predetermined interval (72 ° interval in the figure). A second plate 14 is installed at each end of the second buckling material 13, and the second plate 14 and the second buckling material 13 are fixed by welding or the like. Here, the shape of the 2nd buckling material 13 has a shape based on the technical idea similar to the 1st buckling material 9 of the 1st buckling member 8 mentioned above.

  The axial length of the second buckling member 12 is shorter than the first buckling member 8 by a predetermined length (in FIG. 2, it is shorter by 2L).

  Furthermore, the second plate 14 is formed with grooves 14c that open to the outer circumferential side in the radial direction at predetermined intervals between the through holes 14b (72 ° intervals in the figure). In the groove 14c, the first buckling member 9 of the first buckling member 8 is disposed so as to be movable in the axial direction, and the groove 14c opens to the outer peripheral side in the radial direction, so that the first buckling member 9 is buckled. It does not prevent deformation in the outer diameter direction. Then, as shown in FIG. 4, by setting the first and second buckling members 9 and 13 on the same radius, the cross-sectional areas of the first and second buckling members 9 and 13 can be set large. it can. Although the freedom degree of the rigidity with respect to the buckling load of a buckling material can be raised, it is not restricted to this, If it installs so that the 1st, 2nd buckling material 9 and 13 of each other may not overlap in radial direction at least. Good.

  Returning to FIG. 2, the nut 3 fixed to one first plate 10 of the first buckling member 8 is screwed with the male screw 2 a of the rod 2, and the other first plate 10 moves relative to the rod 2. Installed as possible. Further, the second buckling member 12 is installed so as to be movable in the axial direction with respect to the rod 2.

  From such a state, the first buckling member 8 is mounted with the jig 5 for fixing the plate 10 on the nut 6 side and a buckling load is applied to the first and second buckling members 8 and 12. The buckling modes of the first and second buckling members 8 and 12 will be described with reference to FIG.

  FIG. 2 (1) shows a state in which a jig 5 for applying a buckling load is attached to the building foundation material 1. From this state, one plate 10 is fixed by the jig 5 using the drawing device disclosed in Japanese Patent Laid-Open Nos. 63-241291 and 63-315727, not shown, and the rod 2 is shown in the figure. Pull to the right to apply a load to the first buckling material 9. Due to this load, first buckling of the first buckling member 9 of the first buckling member 8 occurs. Note that, when an axial load is applied to the first buckling member 9, the nut 6 is pulled in the axial direction. When the nut 6 fixed to the rod 2 is rotated, relative rotation occurs between the male screw 2 a of the rod 2 and the nut 3, and no load is applied to the buckling material 9.

  When the amount of movement of the rod 2 is 2L, which is the difference in the axial direction between the first buckling member 8 and the second buckling member 12, the first buckling member 8 is moved as shown in FIG. The plate 10 and the second plate 14 of the second buckling member 12 come into contact with each other, and a load is applied to the buckling member 13 of the second buckling member 12. At this time, the first buckling member 9 of the first buckling member 8 has already buckled, and the load necessary for buckling has decreased. Therefore, the load which buckles the 1st, 2nd buckling members 8 and 12 can be reduced compared with the case where the 1st and 2nd buckling members 8 and 12 are buckled simultaneously.

Further, the rod 2 is continuously pulled, and the load is stopped when the axial length of the first buckling member 8 reaches the predetermined length X as shown in FIG. Through the steps so far, the first and second buckling members 8 and 12 reach a predetermined “<”-shaped buckling state. Since the first and second buckling members 9 and 13 are arranged with substantially the same radius, the cross-sectional area can be set large, and the first and second buckling members 9 and 13 can resist the resistance of the natural ground. The buckling shape can be a predetermined “<” shape in FIG. 2 (4), without changing the buckling shape of the first and second buckling members 8, 12. The nut 6 is rotated so that the through-hole 2b is arranged at a predetermined position substantially at the center of the first and second buckling members 8 and 12, and the rod 2 is returned to the left (natural ground) direction. By rotating the nut 6, the first and second buckling members 8, 12 try to rotate via the rod 2, but since the rotation is limited by natural ground, the male screw 2 a of the rod 2 and the first plate As a result, relative rotation with the nut 3 occurs, only the rod 2 moves in the axial direction, and the through hole 2b moves to a predetermined position.

  FIG. 5 is a diagram for explaining a construction process of the foundation material 1 for construction to the natural ground.

  First, as shown in FIG. 5 (1), an installation hole 16 for installing the construction base material 1 in the natural ground is excavated in the natural ground at a predetermined position. In the subsequent step shown in FIG. 5 (2), the construction base material 1 is disposed in the installation hole 16, and the first and second bucklings as described in FIG. 2 in the step shown in FIG. 5 (3). A load is applied to the members 8 and 12 to buckle the first buckling members 9 and 13 to a predetermined shape.

  In the step shown in FIG. 5 (4), after the first and second buckling members 8 and 12 are buckled into a predetermined shape, a rod is used to install the through hole 2b, which is a high-pressure air outlet, at a predetermined position. Move 2. And after arrange | positioning the through-hole 2b in a predetermined position, the high-pressure air from the high-pressure air supply source which is not illustrated is ejected through the hollow rod 2 toward the natural ground from the through-hole 2b, and buckled "" The earth and sand in the vicinity of the first and second buckling members 9 and 13 are removed. Then, in the step of FIG. 5 (5), the grout is filled from the through hole 2b into the portion where the earth and sand have been removed, and the construction of the building foundation material 1 is completed.

  FIG. 6 is a cross-sectional view showing the configuration of the stopper 20 for defining the buckling shape of the building foundation material 1.

  The stopper 20 is a pair of second buckling members 9 and 13 inside the first and second buckling members 9 and 13 in order to regulate the buckling shape of the first and second buckling members 8 and 12, that is, the amount of axial displacement. It is a cylindrical member installed between the plates 14. The stopper 20 is arranged coaxially with the rod 2. The axial length of the stopper 20 is set according to the buckling shape (axial displacement amount) of the first and second buckling members 8 and 12, and the shorter the displacement, the larger the displacement amount. The bending materials 9 and 13 project to the outside. By holding the stopper 20 between the pair of first and second plates 10 and 14, the first and second buckling members 9 and 13 are regulated so as not to buckle any more.

  For example, the stopper 20 is used when the grout filling is not performed after the construction base material is installed. For example, when the stopper 20 is used for the construction base material 1 for temporary construction that is not filled with grout, if the stopper 20 is provided in the construction base material 1 in advance so that buckling does not advance more than a predetermined amount, The buckling shape of the base material 1 can be reliably maintained, and can be easily removed from the natural ground by rotating the rod 2 and extending the first and second buckling members 8 and 12 at the time of removal. .

  Accordingly, the present invention provides a plurality of rod-shaped first buckling members arranged on the same radius, a pair of first plates for fixing both ends thereof, and a female screw member fixed to one of the pair of first plates. A plurality of first buckling members, a rod-shaped second buckling material, and a plurality of the second buckling materials on a radius substantially the same as the radius where the first buckling material is disposed, and both ends thereof A pair of second plates for fixing the second buckling member between the fixing positions of the second buckling member of the second plate, and a groove in which the first buckling member is movably installed. A second buckling member having a predetermined axial length shorter than the first buckling member, and a male screw that penetrates the first and second buckling members and is screwed to the female screw member on the outer periphery thereof. And the first and second buckling members are fixed to the first plate or the second plate. The first buckling member is configured to buckle to the outer peripheral side, restricts the other axial movement of the first plate of the first buckling member, and moves the rod from one side of the first plate to the other direction to The first buckling member and the second buckling member are buckled in this order.

  For this reason, the cross-sectional areas of the first and second buckling members can be set larger than those of the prior art, and a predetermined “<” shape can be formed in the natural ground. Further, since the axial lengths of the first buckling member and the second buckling member are made different, by delaying the buckling start time of the second buckling material from the buckling start time of the first buckling material, Compared with the case where the first and second buckling materials are buckled simultaneously, the load required for buckling can be reduced.

  The present invention is not limited to the embodiment described above, and various modifications and changes can be made within the scope of the technical idea, and it is obvious that these are equivalent to the present invention.

The block diagram of the construction | foundation base material of this invention, (a) Before buckling, (b) After buckling. Sectional drawing of the basic material for construction. The block diagram of the plate of a 1st buckling member. The block diagram of the plate of a 2nd buckling member. The figure explaining the installation method to the natural ground of the foundation material for construction. Sectional drawing explaining the stopper shape of the base material for construction.

Explanation of symbols

1: basic material for construction 2: rod 2a: male screw 2b: through hole 3: nut 5: jig 6: nut 8: first buckling member 9: first buckling material 10: plates 11a, 11b: notch 12 : Second buckling member 13: second buckling material 14: plate 14a: through hole 14b: through hole 14c: grooves 15a, 15b: notch 20: stopper

Claims (9)

A rod-shaped first buckling material, a plurality of first buckling materials arranged on the same radius, a pair of first plates for fixing both ends thereof, and a female screw fixed to one of the pair of first plates, A first buckling member comprising: a female screw member formed with:
A rod-shaped second buckling material, and a plurality of the second buckling materials are arranged on substantially the same radius as the radius where the first buckling material is arranged, and a pair of second plates for fixing both ends thereof. And a groove is provided between the fixed positions of the second buckling material on the second plate and is opened on the outer peripheral side so that the first buckling material can be moved. A second buckling member whose directional length is short by a predetermined length;
A rod that penetrates through the first and second buckling members and is provided with a male screw that engages with the female screw member on the outer periphery thereof;
The first and second buckling members are formed so as to buckle to the outer peripheral side in a state of being fixed to the first plate or the second plate,
The first buckling member is restrained from moving in the other axial direction of the first plate, and the rod is moved from one side of the first plate to the other direction to move the first buckling member and the second buckling member. A foundation material for construction characterized by buckling in order.   The rod is formed in a hollow shape with a bottom, and is provided with a through-hole penetrating the wall portion in the radial direction. The through-hole is formed facing the buckled first and second buckling materials. The construction base material according to claim 1.   The foundation material for construction according to claim 2, wherein air is blown out from the through-hole of the rod to remove the sand and sand near the buckled first and second buckling materials.   The foundation material for construction according to claim 3, wherein grout is filled from the through hole into a portion where the earth and sand in the vicinity of the first and second buckling materials are removed.   The first and second buckling members are provided with a notch inside the substantially central portion of the first and second buckling members fixed to the first plate or the second plate, and are cut out on the outer sides in the vicinity of the both ends. The construction base material according to claim 1, wherein the base material for construction is configured to buckle in the shape of a “<” character on the outer peripheral side.   The first and second buckling members are formed such that a central portion is convex outwardly with both ends fixed to the first plate or the second plate. The foundation material for construction according to 1 or 5.   7. The construction foundation according to claim 1, wherein the first buckling material and the second buckling material are alternately arranged at a predetermined interval on the same radius. Wood.   The construction base material according to claim 1, further comprising a stopper for restricting axial movement of the first and second plates.   9. The construction base material according to claim 8, wherein the stopper is a cylindrical member disposed coaxially with the rod and between the second plates.