KR102907006B1 - Groove filling unit for earth anchor and earth filling method using the same - Google Patents

Abstract

The present invention provides a groove-filling unit for an earth anchor and a soil retaining method using the same, which can effectively realize a groove-filling between a thumb pile (H-beam) twisted and penetrated into the ground and a belt, thereby exhibiting a stable bearing capacity of the belt, thereby suppressing deformation of a soil retaining wall, and improving the construction stability of the soil retaining method. According to a preferred embodiment of the present invention, a groove-filling unit for an earth anchor is installed between a thumb pile of a soil retaining wall and a belt that provides a bearing surface for constructing an earth anchor, and which includes: an earth anchor support block that is supported by the thumb pile and forms an installation angle of the earth anchor in the direction of a bearing axis along which the bearing force of the earth anchor acts; an angle-adjusting block that is installed in a shape-fitted manner on a curved surface having a constant radius of curvature with the earth anchor support block so as to be angle-adjustable in the circumferential direction of the curved surface; and one or more sliders, one end of which is slidably fitted into the angle-adjusting block. It is characterized by including a screw adjustment cap that is screw-connected to the above slider and can be moved in the compression direction and supported on the belt.

Description

Groove filling unit for earth anchor and earth retaining method using the same {Groove filling unit for earth anchor and earth filling method using the same}

The present invention relates to a home-filling unit for an earth anchor installed between a thumb pile and a belt of an earth retaining wall, and to a earth retaining method using the same, and more particularly, to a home-filling unit for an earth anchor and an earth retaining method using the same, which enable a required installation angle of an earth anchor to be realized between a thumb pile (H beam) twisted and penetrated into the ground and a belt, thereby exhibiting a stable bearing capacity of the belt, thereby suppressing deformation of an earth retaining wall, and improving the construction stability of an earth retaining method.

Earth retaining walls are constructed to prevent soil and sand from collapsing during excavation work at civil engineering construction sites. To prevent collapse of the earth retaining wall, strut or earth anchor methods are typically used. The earth anchor method is a method of supporting earth pressure through tensile force by forming an anchor body on the back of the earth retaining wall. The anchor uses a tension member to transmit the force into the soil or rock. At this time, a belt is installed on the thumb pile on the side of the earth retaining wall to fix the head of the earth anchor. However, if the thumb piles are arranged irregularly after construction, an irregular gap (groove) will occur between the thumb pile and the belt, and a groove-filling steel (angle, steel plate, H-shaped steel, etc.) is installed to fill this groove. At this time, it is difficult to standardize the groove-filling steel because the groove spacing between the thumb pile and the belt at the corresponding location is different, and there is a problem that it cannot actively respond to the tilted angle of the belt according to the installation direction of the earth anchor, and the welding installation work is difficult. In particular, even if the distance between the soil retaining walls is configured to be the same and the groove is filled, there was a problem that the groove was difficult to fill when the H-pile was constructed with the flange face twisted or when there was an incline in the verticality because the distance on both sides was different during the groove-filling.

The background technology of the present invention is proposed in Korean Patent Registration No. 10-1677811, titled 'Earth anchor single belt steel structure for retaining wall and construction method thereof'. This is a removable earth anchor belt structure for retaining wall that can be reused by assembling a belt made of facing steel materials, and then assembling a gap-maintaining joint plate for replacing a stiffener, a pressure plate, an upper and lower fixing device for an anchor tension part, an upper and lower fixing device for a shaft support part, and a groove-filling holder and spacer combined with a shaft bolt, thereby enabling the reuse of angle brackets and groove-filling steel materials, and enabling the angle brackets and groove-filling to be easily assembled and constructed.

However, the above background technology has the problem that the home-filling work is complicated and requires many fastening parts, as two belts must be installed with their backs facing each other, spacers must be additionally installed according to the groove spacing on the home-filling holder, and additional installation work is required to connect the home-filling holder to the belt using an axis bolt and a fixing device.

Korean Patent Registration No. 10-1677811

The purpose of the present invention is to provide a groove-filling unit for an earth anchor and an earth retaining method using the same, which can realize a required installation angle of an earth anchor between a thumb pile (H-beam) twisted and penetrated into the ground and a belt, thereby exhibiting a stable bearing capacity of the belt, thereby suppressing deformation of an earth retaining wall, and improving the construction stability of an earth retaining method.

According to a preferred embodiment of the present invention, a home-filling unit for an earth anchor is installed between a thumb pile of a retaining wall and a belt that provides a bearing surface for constructing an earth anchor, and is characterized by including: an earth anchor support block that is supported by the thumb pile and forms an installation angle of the earth anchor in the bearing axis direction on which the bearing force of the earth anchor is applied; an angle adjustment block that is installed by being tooth-shaped and coupled to a curved surface having a constant radius of curvature with the earth anchor support block so as to be angle-adjustable in the circumferential direction of the curved surface; one or more sliders that are fitted with one end of the angle adjustment block so as to be slidably movable; and a screw adjustment cap that is screw-connected to the slider and is movable in the bearing axis direction and supported by the belt.

In addition, the above earth anchor support block is characterized by having a sloped surface that is oriented toward a thumb pile on one side and a toothed surface on the other side.

In addition, the angle adjustment block is characterized in that a tooth shape is formed on a curved surface having a radius of curvature centered on the compression axis, and one or more slider movement guide grooves are formed on the other surface.

In addition, the slider is characterized in that it has a protruding guide jaw formed on one side for being moved by being fitted into an angle adjustment block, and a screw shaft having a screw hole for screwing a screw adjustment cap on the other side.

In addition, the screw adjustment cap is characterized by being provided with a feed adjustment shaft that is screw-connected to a screw hole formed in the screw shaft of the slider, a screw protection cover that has a concentric axis with the feed adjustment shaft and is formed in a cylindrical shape around the screw protection cover, a lubricant injection room formed between the feed adjustment shaft and the screw protection cover and into which lubricant is injected, and a rotation operation flange for rotation operation of the screw adjustment cap.

In addition, the screw adjustment cap is characterized in that a micro-adjustment member is further installed, which has a screw shaft at one end, is screw-connected to the screw adjustment cap so as to be movable in the direction of the compression axis, and has a screw hole for preliminary connection of an additional micro-adjustment member at the other end.

In addition, the sliders are characterized in that they are installed in pairs in parallel on the angle adjustment block.

In addition, the belt is characterized by comprising a pair of hollow square tubes made of steel and having a square cross-section over a certain length, arranged in parallel with a gap through which the steel wire of the earth anchor can pass to form a bearing surface; an inner reinforcing plate arranged in the longitudinal direction inside each of the pair of hollow square tubes and then intermittently installed along the longitudinal direction of the belt; a plate-shaped bridge positioned at a certain interval between the gaps and arranged perpendicular to the inner reinforcing plate and connected to the pair of hollow square tubes; and a belt connecting plate fixedly connected to both ends of the pair of hollow square tubes.

Meanwhile, a soil retaining method using a home-filling unit for an earth anchor according to an embodiment of the present invention comprises the steps of constructing a soil retaining wall in which thumb piles are installed along an excavation area in a planned ground; the step of excavating to a certain depth in an internal area of the soil retaining wall and then installing a home-filling support on the thumb pile; the step of supporting a home-filling unit for an earth anchor on the home-filling support and placing it in close contact with the thumb pile; A method for manufacturing a home-filling unit for an earth anchor, comprising: a step of installing an earth anchor after supporting a belt to a thumb pile by placing the belt on the home-filling unit for an earth anchor; wherein, in the step of installing the home-filling unit for an earth anchor, the inclined surface of the earth anchor support block is placed on the thumb pile, and then the tooth-joining position of the angle-adjusting block is adjusted so that it is placed in a direction perpendicular to the direction of the ground compression axis, and the home-filling is performed by closely contacting the belt with the screw-adjusting cap through the movement of the slider and the rotation of the screw-adjusting cap.

In addition, in cases where it is difficult to attach the screw adjustment cap to the belt, it is characterized in that a micro-adjustment part is additionally screwed onto the screw adjustment cap to move it in the direction of the compression axis.

According to the groove-filling unit for earth anchors of the present invention and the earth retaining method using the same, an angle-adjusting block is connected to the earth anchor support block in a toothed manner to change the position of the rotation angle, thereby achieving good groove-filling between the belts regardless of the twisted alignment of the thumb piles, thereby enabling construction in the designed direction of the earth anchor's anchorage. In addition, the position of the screw-adjusting cap can be changed by moving the slider to find a stable point of contact with the belt, thereby ensuring stable bearing capacity of the belt. In addition, it has the advantage of being able to realize wide groove-filling by additionally using a fine-adjusting tool in addition to the screw-adjusting cap. In addition, the belt is constructed so that the earth anchor has high tensile strength by being constructed so that deformation and collapse of the earth retaining wall are suppressed, and the bearing capacity of the earth retaining wall is further enhanced, thereby ensuring safe earth retaining construction.

The following drawings attached to this specification illustrate preferred embodiments of the present invention and, together with the detailed description of the invention, serve to further understand the technical idea of the present invention, and therefore, the present invention should not be interpreted as being limited to the matters described in the attached drawings.
FIG. 1 is a perspective view of a home-making unit for an earth anchor according to an embodiment of the present invention.
Figure 2 is an exploded perspective view of Figure 1.
Figure 3 is a longitudinal cross-sectional view of Figure 1.
Figures 4 (a) and (b) are plan views of the earth anchor support block and angle adjustment block shown in Figure 2.
Figure 5 is a longitudinal cross-sectional view of the slider and screw adjustment cap shown in Figure 2.
Fig. 6a is a diagram showing the home anchor unit shown in Fig. 1 attached to a thumb stake.
Figure 6b is a plan view of the home anchor unit shown in Figure 1 installed on a twisted thumb stake.
Fig. 7a is a diagram showing a state in which a belt is installed in the home-meshing unit for the earth anchor of Fig. 6a.
Figure 7b is a three-dimensional perspective view of Figure 7a.
Figure 8 is a cross-sectional view showing a fine adjustment mechanism additionally combined with a screw adjustment cap applied to the present invention.
Fig. 9 is a perspective view of the fine adjustment device illustrated in Fig. 8.
Figure 10 is a perspective view of a home-making unit for an earth anchor according to another embodiment of the present invention.
Figure 11 is a plan view of Figure 10.
Fig. 12 is a cross-sectional view taken along line CC of Fig. 11.

Below, the present invention is described in detail with reference to embodiments presented in the attached drawings, but the presented embodiments are exemplary for a clear understanding of the present invention and the present invention is not limited thereto.

As shown in FIG. 1 and FIG. 7a, a home-making unit (100) for an earth anchor is installed between a thumb pile (10) of a retaining wall (5) and a belt (12) that provides a pressure surface for construction of an earth anchor (14).

As shown in FIGS. 1 to 5, the home-making unit (100) for an earth anchor includes an earth anchor support block (110), an angle adjustment block (120), a slider (150), and a screw adjustment cap (160).

The earth anchor support block (110) is installed while being supported by a thumb pile (10). The earth anchor support block (110) is installed in the direction of the earth pressure axis (X) on which the earth pressure (P) of the earth anchor (14) acts. Therefore, the earth anchor support block (110) forms an installation angle (θ) of the earth anchor (14). The installation angle (θ) refers to the angle at which the steel wire (or steel bar) of the earth anchor (14) is installed.

Here, the compression axis (X) means the direction in which the steel wire (14) (or steel bar) of the earth anchor (14) is arranged, as shown in FIG. 6a and FIG. 7a, or the direction parallel thereto.

The earth anchor support block (110) has an inclined surface (111) that is contacted with the thumb pile (10) on one side and a tooth profile (112a) on the curved surface (112) on the other side. Therefore, the earth anchor support block (110) is installed with the inclined surface (111) contacting the thumb pile (10) as shown in Fig. 6a. At this time, the tooth profile (112a) is formed in a vertical direction with respect to the ground compression axis (X).

Additionally, to prevent the angle adjustment block (120) from leaving the joining position, an angle adjustment block separation prevention groove (114a) is formed on the angle adjustment block support jaw (114) of the earth anchor support block (110), and an angle adjustment block separation prevention jaw (125) formed on the lower surface of the angle adjustment block (120) can be fitted into the angle adjustment block separation prevention groove (114a). At this time, the angle adjustment block separation prevention groove (114a) and the angle adjustment block separation prevention jaw (125) are formed in an arc shape with the same center at the center point (O) of the radius of curvature (R).

The angle adjustment block (120) is installed by being tooth-joined with the earth anchor support block (110) on a curved surface having a constant radius of curvature (R). Therefore, the angle adjustment block (120) can be angle-adjusted in the circumferential direction of the curved surface depending on the position at which it is tooth-joined with the earth anchor support block (110).

The angle adjustment block (120) has a curved surface (121) having a radius of curvature (R) centered on the compression axis (X) and has a tooth profile (121a) formed thereon, and one or more slider movement guide grooves (122a) formed on the other surface (122) to couple a slider (150). Accordingly, the tooth profile (121a) of the angle adjustment block (120) is coupled with the tooth profile (112a) of the earth anchor support block (110).

In this way, the angle adjustment block (120) can be adjusted by placing the center (O) of the radius of curvature (R) on the earth anchor support block (110), so that when the thumb pile (10) is twisted and inserted as shown in FIG. 6b, the angle is adjusted without following the earth anchor support block (110) and the posture is changed, thereby enabling good home filling between the belts (12). As a result, the ground pressure bearing capacity of the earth anchor (14) is improved, stabilizing the introduction of tension force, thereby improving the stability of the earth retaining wall.

The slider (150) is installed by being fitted into the angle adjustment block (120) so that one end can slide and move. The slider (150) has a protruding guide protrusion (151) formed on one side for being fitted into the angle adjustment block (120) and moving, and a screw shaft (152) having a screw hole (152a) for screwing a screw adjustment cap (160) on the other side.

Accordingly, the slider (150) can move in a straight line by fitting the guide jaw (151) into the slider movement guide groove (122a) of the angle adjustment block (120) to adjust the support position of the screw adjustment cap (160).

The screw adjustment cap (160) is screw-connected to the slider (150) and installed so as to be movable in the direction of the compression axis (X). Therefore, the screw adjustment cap (160) can be rotated to support the belt (12) as shown in Fig. 7a.

As shown in Fig. 5, the screw adjustment cap (160) is provided with a feed adjustment shaft (161) that is screw-connected to a screw hole (152a) formed in the screw shaft (152) of the slider (150), a screw protection cover (162) that is concentric with the feed adjustment shaft (161) and formed in a cylindrical shape around the screw protection cover, a lubricant injection chamber (163) formed between the feed adjustment shaft (161) and the screw protection cover (162) and into which lubricant is injected, and a rotation operation flange (164) for rotation operation of the screw adjustment cap (160). Therefore, when the screw adjustment cap (160) is rotated, the feed adjustment shaft (161) is moved on the screw shaft (152) of the slider (150), so that the position of the screw adjustment cap (160) is changed in the direction of the compression axis (X), thereby stably exerting a close contact force with the belt (12).

Here, the angle adjustment home filling unit (100) is configured by installing a pair of sliders (150) in parallel on the angle adjustment block (120) as shown in FIGS. 1 and 3, but the sliders (150) may also be installed in a single form as shown in FIGS. 10 to 12.

Here, when the sliders (150) are installed as a pair, the screw adjustment caps (160) are also installed as a pair so that when tension is introduced to the earth anchor (14), the home filler unit (100) for the earth anchor stably resists the pressure of the belt (12) through two points.

Meanwhile, when the gap between the thumb peg (10) and the belt (12) is large, a fine adjustment hole (170) may be additionally installed in the screw adjustment cap (160) as shown in Fig. 8. As shown in Fig. 9, the fine adjustment hole (170) has a screw shaft (170a) at one end and is screw-connected to the screw adjustment cap (160) so as to be movable in the direction of the pressure axis (X), and has a screw hole (170b) at the other end for preliminary connection of an additional fine adjustment hole (170). At this time, for the fine movement of the fine adjustment hole (170), it is preferable that the screw pitch of the screw shaft (170a) be formed smaller than the screw pitch of the screw shaft (152) of the slider (150). As shown in Fig. 8, the body of the fine adjustment device (170) can be manufactured, for example, by using polygonal plates (171, 172) and a cylindrical body (173) welded between these polygonal plates (171, 172).

On the other hand, the belt (12) is made of steel as shown in FIGS. 7a and 7b to increase cross-sectional rigidity and compressive strength and to facilitate installation of the earth anchor (14), and has a square cross-section over a certain length, and is arranged in parallel with a gap (G) through which the steel wire (142) of the earth anchor (14) can pass to form a bearing surface. A pair of hollow square tubes (122, 122a) are arranged in the longitudinal direction (bearing compression axis direction) inside each of the pair of hollow square tubes (122, 122a) and then intermittently installed along the longitudinal direction of the belt (12), and a plate-shaped bridge (126) is positioned at a certain interval between the gaps and is arranged perpendicular to the inner reinforcement plate (124) and is connected to the pair of hollow square tubes (122, 122a) and a pair of hollow It can be composed of a belt connecting plate (128) fixedly connected to both ends of each pipe (122, 122a).

When the belt (12) is configured in this way, the cross-section is hollow, reducing the weight, and at the same time, the number of steel plate elements that resist by being arranged in the direction of the compression axis (X) increases to seven, thereby improving the bending rigidity. In addition, the steel wire (142) of the earth anchor (14) passes through the gap (G) formed between the hollow square tubes (122, 122a), thereby improving the constructability.

A soil retaining method using a home-filling unit (100) for an earth anchor configured in this manner is described.

First, a retaining wall (5) is constructed along the excavation area on the planned ground as shown in Figs. 6a and 6b, with thumb piles (10) installed.

Next, excavation is performed to a certain depth in the inner area of the retaining wall (5), and then a groove filling support (11) and a belt support (not shown) (beam) are installed on the thumb pile (10).

Next, install the home filler unit (100) for the earth anchor on the home filler support (11).

In the installation step of the home-filling unit (100) for the earth anchor, the inclined surface (111) of the earth anchor support block (110) is attached to the thumb pile (10), and then the tooth-joining position of the angle adjustment block (120) is adjusted so that it is placed perpendicular to the direction of the ground compression axis (X) and the tooth-joining is performed on the earth anchor support block (110), and the screw adjustment cap (160) is pressed against the belt (12) by moving the slider (150) and rotating the screw adjustment cap (160).

Here, in cases where it is difficult to attach the screw adjustment cap (160) to the belt (12), as shown in Fig. 8, an additional step may be added to screw-connect the fine adjustment part (170) to the screw adjustment cap (160) and move it in the direction of the compression axis (X).

Next, the belt (12) is placed on the belt support and then the earth anchor (14) is installed. At this time, the fixing end of the earth anchor (14) can utilize the pressure plate (13) installed on the belt (12) as shown in Fig. 7b.

In this way, when the earth anchor home-filling unit (100) is installed and the earth retaining method is implemented, the home-filling is effectively realized between the thumb pile (10) that is twisted and penetrated into the ground and the belt (12), so that the required installation angle of the earth anchor (14) can be implemented in the desired direction, and the stable support force of the belt (12) is exerted, thereby suppressing deformation of the earth retaining wall (5) and improving the construction stability of the earth retaining method.

While the present invention has been described in detail with reference to the presented embodiments, those skilled in the art will appreciate that various modifications and variations can be made without departing from the technical spirit of the present invention. The present invention is not limited by such modifications and variations, but is instead limited by the appended claims.

5: Earth retaining wall
10: Thumb stake
12: Belt
14: Earth Anchor
100: Home filler unit for earth anchors
10: Earth anchor support block
120: Angle adjustment block
150: Slider
160: Screw adjustment cap
170: Fine adjustment hole

Claims (10)

In the earth anchor home filler unit (100) installed between the thumb pile (10) of the earth retaining wall (5) and the belt (12) that provides a pressure surface for the construction of the earth anchor (14),
An earth anchor support block (110) that forms an installation angle (θ) of the earth anchor (14) in the direction of the earth pressure axis (X) on which the earth pressure (P) of the earth anchor (14) is applied by being supported by the thumb pile (10);
An angle adjustment block (120) that is installed on a curved surface having a constant radius of curvature (R) by being connected to the above earth anchor support block (110) so that the angle can be adjusted in the circumferential direction of the curved surface;
One or more sliders (150) that are fitted and connected to the above angle adjustment block (120) so that one end can slide and move;
A home-filling unit for an earth anchor, characterized by including a screw-adjusting cap (160) that is screw-connected to the slider (150) and can be moved in the direction of the compression axis (X) and supported on the belt (12). In paragraph 1,
The above earth anchor support block (110) is a home-filling unit for an earth anchor, characterized in that it has a slope (111) that is faced to a thumb stake (10) on one side and a curved surface (112) on the other side, and has a tooth shape (112a). In paragraph 1,
The above angle adjustment block (120) is a home-filling unit for an earth anchor, characterized in that a tooth shape (121a) is formed on a curved surface (121) having a radius of curvature (R) centered on the compression axis (X), and one or more slider movement guide grooves (122a) are formed on the other surface (122). In paragraph 1,
A home-filling unit for an earth anchor, characterized in that the slider (150) has a protruding guide jaw (151) formed on one side for movement by being fitted into an angle adjustment block (120) and a screw shaft (152) having a screw hole (152a) for screw-fitting a screw adjustment cap (160) on the other side. In paragraph 1,
The above screw adjustment cap (160)
A home-filling unit for an earth anchor, characterized in that it comprises a feed control shaft (161) that is screw-connected to a screw hole (152a) formed in a screw shaft (152) of a slider (150), a screw protection cover (162) that has a concentric axis with the feed control shaft (161) and is formed in a cylindrical shape around the screw protection cover, a lubricant injection chamber (163) formed between the feed control shaft (161) and the screw protection cover (162) and into which lubricant is injected, and a rotation operation flange (164) for rotation operation of a screw adjustment cap (160). In paragraph 1,
A home-filling unit for an earth anchor, characterized in that the screw adjustment cap (160) has a screw shaft (170a) at one end and is screw-connected to the screw adjustment cap (160) so as to be movable in the direction of the pressure axis (X) and has a screw hole (170b) at the other end for preliminary connection of an additional fine adjustment member (170). In paragraph 1,
A home-making unit for an earth anchor, characterized in that the above sliders (150) are installed in pairs in parallel on an angle adjustment block (120). In paragraph 1,
The above belt (12)
A pair of hollow square tubes (122, 122a) made of steel and having a square cross-section over a certain length and arranged in parallel with a gap (G) through which a steel wire (142) of an earth anchor (14) can pass to form a pressure surface;
An inner reinforcing plate (124) arranged in the longitudinal direction inside each of a pair of hollow square tubes (122, 122a) and then installed intermittently along the longitudinal direction of the belt (12);
A plate-shaped bridge (126) positioned at regular intervals between the inner reinforcement plates (124) and perpendicularly arranged and connected to a pair of hollow square tubes (122, 122a); and
A home-filling unit for an earth anchor, characterized by comprising a belt connecting plate (128) fixedly connected to both ends of a pair of hollow square pipes (122, 122a). A step of constructing a retaining wall (5) with thumb piles (10) installed along the excavation area on the planned ground;
A step of installing a groove filling support (11) on a thumb pile (10) after excavating to a certain depth in the inner area of the earth retaining wall (5);
A step of supporting a home filler unit (100) for an earth anchor of any one of claims 1 to 6 on a home filler support (11) and placing it in close contact with a thumb stake (10);
A step of installing an earth anchor (14) after supporting a belt (12) on a home-making unit (100) for an earth anchor and placing it on a thumb stake (10); including,
In the installation stage of the home-making unit (100) for the earth anchor,
A soil retaining method using a groove-filling unit for an earth anchor, characterized in that a groove is filled by a process in which the inclined surface of an earth anchor support block (110) is attached to a thumb pile (10), the tooth-shaped joining position of an angle-adjusting block (120) is adjusted so that it is placed perpendicular to the direction of the ground compression axis (X) and the tooth-shaped joining position is then placed on the earth anchor support block (110), and the screw-adjusting cap (160) is pressed against the belt (12) by moving a slider (150) and rotating the screw-adjusting cap (160). In paragraph 9,
In case it is difficult to attach the screw adjustment cap (160) to the belt (12),
A soil retaining method using a home-filling unit for an earth anchor, characterized in that a fine adjustment part (170) is additionally screw-connected to the above screw adjustment cap (160) and moved in the direction of the compression axis (X).