JP2002138473A - Pressure-receiving frame for ground anchor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pressure-receiving frame for a ground anchor, which enables weight reduction while maintaining minimum required strength by the facilitation of assembly and the simplification of a structure and enables ease of installation conditions and a reduction in the labor and cost of the whole of anchor work by facilitating transport to a job site. SOLUTION: The pressure-receiving frame is fixed to an anchor tension member so as to hold ground in such a state that a core part 2 formed as an approximately box-shaped body, plural arm parts 3 having continuous plane sections and a pressure-receiving plate 4 having a symmetric plane shape are assembled for integration. Consequently, a place for the assembly and the integration can be arbitrarily selected, the assembly can be conducted even at the job site of the anchor work, the transport can be performed in such a state as to be divided into the core part 2, the arm part 3 and the plate 4, the facilitation of the transport to the job site enables execution even in such a conventional condition as to complicate the execution for the purpose of enabling application to various sections and an increase in the efficiency of the whole of operations.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ground anchor pressure receiving frame used in a ground anchor construction method.

[0002]

2. Description of the Related Art In order to prevent the occurrence of landslides or the like due to ground collapse on slopes or slopes that have been created, ground stabilization work has conventionally been widely performed. The general construction method of the conventional ground anchor installation is to insert an anchor tension member made of a steel wire or the like into the ground and fix one end thereof to the ground, while exposing the other end of the anchor tension member to the ground. State, after further installing a concrete anchor pedestal on the ground surface, the ground exposed portion is integrally fixed to the anchor pedestal in a state where the anchor tension member is tensioned until a predetermined tension is obtained, The ground is stably held by transmitting the tension of the anchor tension member from the anchor base to the ground.

[0003] However, since the anchor pedestal used in the conventional ground anchor installation work is made of concrete,
It is very heavy and cannot be transported or installed unless heavy equipment such as large trucks and large cranes are used.In narrow construction sites where large heavy equipment cannot fit, it is impossible to lift and install the anchor pedestal above the slope. Had the problem that

In order to solve these problems, in recent years, a pressure receiving frame in which steel plates are combined in a box shape instead of concrete has been used as an anchor base. One example is described in Japanese Patent No. 1058390, which is shown in FIGS. FIG. 11 is a plan view of a conventional ground anchor pressure receiving frame, and FIG. 12 is a cross-sectional view of the conventional ground anchor pressure receiving frame.

[0005] The conventional pressure receiving frame 100 shown in the above figures
Is formed of a substantially box-shaped core portion 101 having a central hole 101a in a penetrating state, and a hollow substantially box-shaped body like the core portion 101, and is disposed in a cross shape with respect to the core portion 101 to form the core portion 101. The configuration includes four arm portions 102 that are integrally fixed, and a substantially square bottom plate 103 that is integrally fixed to the core portion 101 and the side of the arm portion 102 closer to the ground surface.

[0006] The pressure receiving frame 100 having the above-described structure is lighter than concrete, while having sufficient strength, and can be installed even by a small heavy machine that can be used in a narrow construction site. You. After the installation, if necessary, the interior hollow portion may be filled with a filler such as concrete to increase the strength and the ground holding power.

[0007]

Since the conventional pressure receiving frame for a ground anchor is constructed as described above, it is not as large as a concrete anchor pedestal, but it is heavy and cannot be divided into large shapes. Because it is not possible to assemble with a truck, a truck or a crane cannot be used for transportation and installation. There was a problem that there is.

In recent years, it has been proposed to apply such a ground anchor to ground holding on a slope where the ground holding force can be further reduced. In this case, the ground holding force becomes smaller than before. However, the pressure receiving frame is required to be lighter and easier to carry in.However, the conventional pressure receiving frame has an unnecessarily large weight, is difficult to handle, and has an excessive strength against the ground to be applied. Therefore, there is a problem that the cost is increased and the actual use is difficult.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has a simple structure which is easy to assemble from a divided state, and which can maintain a necessary minimum strength and can be reduced in weight. It is an object of the present invention to provide a pressure receiving frame for a ground anchor which facilitates the loading of the anchor, eases installation conditions, and reduces labor and cost in the entire anchor work.

[0010]

A pressure receiving frame for a ground anchor according to the present invention includes at least a core having a central hole in a penetrating state, and a plurality of arms arranged radially about the core. The anchor tension member having one end fixed to the ground is installed on the ground surface with the other end exposed above the ground passing through the center hole of the core portion, and the exposed ground portion of the anchor tension member is integrally fixed. In the pressure receiving frame for a ground anchor which is fixed to the ground surface, the pressure receiving frame includes a pressure receiving plate formed of a substantially plate-like body having a predetermined plane shape symmetrical with respect to a center position, and a through hole is formed in a center portion, The arm portion is formed of a predetermined shape member having, as a part of an outer surface, a flat portion continuous from one end to the other end in the longitudinal direction, and the core portion surrounds a portion for fixing the end portion of the arm portion. It is formed of a substantially box-like body having a plurality of surfaces, and has a vertically penetrating portion of the ground serving as the center hole at the center portion, before being integrated with the ground exposed portion of the anchor tension member. Fixing the core portion to the pressure receiving plate while aligning the center of the core portion with the center of the pressure receiving plate, fixing the core portion to the pressure receiving plate so that the flat portion of the arm portion is closer to the ground surface, and fixing the end portion of the arm portion. It is fixed to a side portion of the core portion and integrally assembled.

As described above, according to the present invention, the substantially box-shaped core portion, the plurality of arm portions having continuous flat portions, and the symmetric flat pressure receiving plate are combined and integrated, and the integrated portions are formed. By fixing to the anchor tension member in the state and holding the ground, the place to assemble and integrate can be arbitrarily selected, and it can be assembled at the anchor construction site,
The core, arm, and pressure plate can be carried in a split state, which makes it easy to carry them into the site and can be carried out even in situations where construction was difficult in the past.It can be applied to various places and improves the overall work efficiency. I can do it. Also, even if lightweight and simple members are used for each part, a predetermined strength and pressure receiving area can be secured in the final assembled state, and the strength corresponding to the ground holding force can be optimized, and cost reduction can be achieved. Can also be planned.

Further, the pressure receiving frame for a ground anchor according to the present invention is formed, if necessary, of a substantially plate-like body having a plane shape symmetrical with respect to a center point, and extends from a center portion to a predetermined position near an outer periphery to a predetermined position. The pressure receiving plate has a through hole having a predetermined planar shape, and the adjustment plate is fitted at a position where the center of the pressure receiving plate and the center of the adjustment plate substantially coincide with each other. The adjusting plate is fitted into the fitting hole and integrated with the pressure receiving plate in a positional relationship such that the tension member through hole is in a predetermined direction with respect to the pressure receiving plate, and the tension member through hole is formed. And the anchor tension member passed through the core portion can be shifted from the center of the pressure receiving plate within a range of the tension member through hole.

As described above, in the present invention, the adjusting plate fitted to the pressure receiving plate is provided, and the fitting relationship between the adjusting plate and the pressure receiving plate is adjusted to appropriately set the orientation of the tension member through hole with respect to the pressure receiving plate. Then, since the displacement of the anchor tension member from the center of the pressure receiving plate due to the inclination from the vertical direction with respect to the ground can be tolerated in the range of the tension member through hole, the anchor tension member is cast at a predetermined angle from the vertical direction with respect to the ground. Even when the anchor tension member is easily passed through the center hole of the core part, the pressure receiving frame can be installed, and the anchor tension member can be fixed as it is by tensioning the anchor tension member without generating stress in the bending direction. The ground can be held reliably in response to the inclination of the ground. In addition, by adjusting the position of the through hole of the tension member of the adjustment plate, the degree of freedom of the ground anchor placing angle can be increased, and not only the thin and easily bent anchor tension member, but also a high strength anchor tension member which is difficult to bend but has no problem. It can be used, and the ground holding power can be increased.

The pressure receiving frame for a ground anchor according to the present invention may be formed, if necessary, as a substantially box-shaped body having at least one open end as the arm end fixing portion of the core. A plurality of arm fixing portions are respectively provided in a protruding state on the peripheral side surface of the core portion while an open portion is located on a side farthest from the core portion, and an arm end portion is opened from the open portion of the arm fixing portion. The core part and the arm part are integrated by inserting and engaging with the arm fixing part, and further fixing the end of the arm part and the arm fixing part integrally.

As described above, in the present invention, the substantially box-shaped arm fixing portion is integrally provided on the side surface of the core portion, and the arm portion is inserted into and fixed to the arm fixing portion to integrate the arm portion and the core portion. This allows the arm part to be inserted into the arm fixing part and easily assembled to the core part in an accurate positional relationship, further improving the efficiency of the pressure receiving frame assembling work and facilitating on-site Although the structure can be assembled to the ground, a predetermined strength can be secured at the fixed position between the arm and the core, and the ground can be surely pressed and held.

In the pressure receiving frame for a ground anchor according to the present invention, if necessary, the pair of cores may be provided in parallel with each other at an interval capable of holding an end of the arm as the arm end fixing portion. A plurality of sets of arm fixing portions, each of which is disposed in a protruding state on the peripheral side surface of the core portion in a direction substantially perpendicular to the ground surface, and is provided in a substantially plate-like shape of the arm fixing portion. Insert the end of the arm between the bodies,
Further, the end of the arm portion and the arm fixing portion are integrally fixed, and the core portion and the arm portion are integrated.

As described above, according to the present invention, the arm fixing portion made of a substantially plate-like body is integrally provided on the side surface of the core portion, and the arm portion is inserted into and fixed to the arm fixing portion, thereby connecting the arm portion and the core portion. By being integrated, the arm can be quickly integrated with the core by inserting the arm into the arm fixing part of a simple structure and fixing it together, and the efficiency of the pressure receiving frame assembling work can be further improved, While having a structure that can be easily assembled on site, a predetermined strength is secured at the fixed position between the arm portion and the core portion, and the ground can be reliably pressed and held.

In the pressure receiving frame for a ground anchor according to the present invention, if necessary, the pressure receiving plate may protrude to the ground surface side at a plurality of locations which do not overlap with the core portion and the arm portion so as to be freely adjustable in a projecting amount. A plurality of protruding portions that can be grounded, and adjust the amount of protrusion of the protruding portions to appropriately set an interval between the pressure receiving plate and the ground surface in a state where the pressure receiving portion is installed on the ground. .

As described above, in the present invention, a plurality of protrusions whose protrusion amount can be adjusted are arranged on the ground surface side of the pressure receiving plate, and the protrusion amount of each protrusion is changed so that the pressure receiving plate is placed on the ground. Since the distance between each position of the pressure receiving plate and the surface of the ground can be adjusted, the state of contact of the pressure receiving plate with the ground can be optimized to cope with unevenness of the ground, and the ground can be reliably pressed and held. In addition, it is also possible to place the pressure receiving plate in a state of being lifted from the ground by grounding the protruding portion, and if necessary, after filling a gap between the pressure receiving plate and the ground with a predetermined filler, the anchor tension member and It can be fixed and fixed to the ground, and the pressing force can be surely dispersed and transmitted to the ground to hold it firmly.

Further, in the pressure receiving frame for a ground anchor according to the present invention, if necessary, the core portion may be a substantially box-like body obtained by integrally combining a plurality of substantially plate-like bodies. One or a plurality of the substantially plate-shaped members are extended outward by a predetermined length to form at least a part of the arm fixing portion. As described above, in the present invention, the substantially plate-like body forming the core portion is extended outward to become the arm fixing portion,
The force from the anchor tension member is transmitted to the arm through one substantially plate-shaped body consisting of the core part and the arm fixing part,
Further, by transmitting the force from the arm portion to the ground surface via the pressure receiving plate, the flow of force from the anchor tension member can be made smooth, and the ground can be efficiently pressed by the pressure receiving plate. In addition, the connection structure between the core portion and the arm fixing portion can be simplified to reduce the cost, and the strength can be greatly improved by integration as a member.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment of the Present Invention) Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view showing an installation state of a ground anchor pressure receiving frame according to the present embodiment, FIG. 2 is a partially cutaway plan view and a bottom view of the ground anchor pressure receiving frame according to the present embodiment, and FIG. FIG. 4 is an explanatory view of a fitting state of an adjustment plate of a ground anchor pressure receiving frame, FIG. 4 is an explanatory view of an assembling process of a ground anchor pressure receiving frame according to the present embodiment, and FIG. 5 is an anchor tension to the ground anchor pressure receiving frame according to the present embodiment. It is an explanatory view of a member penetration state.

In each of the drawings, the pressure receiving frame 1 according to the present embodiment is formed of a core portion 2 of a substantially steel box hollow substantially box-shaped body having a central hole 2a in a penetrating state, and a member having a substantially H-shaped cross section. Four arm portions 3 fixed to the respective side surfaces of the portion 2 and arranged in a substantially cross shape with the core portion 2 as a center, and a substantially rectangular shape integrally provided on the lower surface side of the core portion 2 and the arm portion 3 The pressure receiving plate 4 and a symmetrically adjusting plate 5 fitted in the center of the pressure receiving plate 4 are provided. This pressure receiving frame 1
A center hole 2a of the core part 2 is provided on the other end of the anchor tension member 10 having one end fixed in the ground 50.
The anchor tension member 10 is fixed to the surface of the ground 50 while being fixed to the surface of the ground 50, and the ground 50 is held.

The core portion 2 is formed of a hollow substantially box-like body having a substantially rectangular planar shape, and each side surface is a fixed portion at the end of the arm portion 3 and has a hole penetrating through the upper and lower surfaces. The center hole 2a through which the exposed portion of the anchor pulling member 10 passes through the upper and lower through holes and the inside of the substantially box-shaped body.
This is the configuration. In the core portion 2, four ribs 2b formed of a substantially square steel plate are fixed to the inner surface of the core portion 2 at both side ends, respectively, in such a manner as to face the respective corner portions. 2 (see FIG. 2A), and the upper end and the lower end are arranged in close contact with the inside of the upper surface and the inside of the lower surface of the core 2, respectively.

The arm 3 is formed of a steel plate member having a substantially H-shaped cross section in which two plane portions are continuous in parallel.
The configuration is such that one of the flat portions is on the lower side with respect to the core portion 2, and is arranged in a substantially cross shape around the core portion 2, and is integrally fixed to the core portion 2. At the position where the end of the arm 3 is fixed to the side surface of the core 2, the end of the rib 2 b exists just across the side of the core 2.

The pressure receiving plate 4 is formed of a substantially rectangular steel plate-like body symmetrical with respect to the center position, and the adjusting plate 5 is provided at the center with the center of the pressure receiving plate 4 and the center of the adjusting plate 5. A fitting hole 4a having a predetermined planar shape to be fitted at a substantially coincident position is formed, and is integrally fixed to the lower surface side of the core portion 2 and the arm portion 3. The pressure receiving plate 4 is fixed to the core portion 2 and the arm portion 3 by welding or pinning.

The adjusting plate 5 is formed of a regular octagonal steel plate, and has a through hole 5a extending from the center to a predetermined position near the outer periphery. The adjustment plate 5 is fitted into the fitting hole 4a at the center of the pressure receiving plate 4 with the tension member through-hole 5a being oriented in a predetermined direction with respect to the pressure receiving plate 4, and is integrated with the pressure receiving plate 4. The adjusting plate 5 is a pressure receiving plate 4
Is different from the pressure receiving plate 4, the orientation of the tension member through hole 5a can be adjusted by changing the positional relationship of the adjusting plate 5 to the pressure receiving plate 4 in eight ways (see FIG. 3). This is a mechanism that allows the displacement of the anchor tension member 10 from the center of the pressure receiving plate 4, that is, the inclination of the anchor tension member 10 with respect to the vertical direction of the ground within the range of the tension member through hole 5a (see FIG. 5). In addition, although the planar shape of the adjusting plate 5 is a regular octagon, the present invention is not limited to this, and may be another regular polygon or a circle.

Next, the assembling operation of the pressure receiving frame based on the above configuration and the state of load transmission after fixing will be described. First, the core part 2, the arm part 3, the pressure receiving plate 4, and the adjusting plate 5
Are brought into the site separately. Then, the adjusting plate 5 is adjusted in advance to any one of eight fitting positions so that the tension member through-hole 5a is oriented in a direction corresponding to the inclination of the anchor tension member 10 with respect to the vertical direction of the ground, and the pressure receiving plate 4 is fitted. It is fitted into the hole 4a and integrated with the pressure receiving plate 4. Thereafter, while the ground exposed portion of the anchor tension member 10 passes through the tension member through hole 5a at the center of the pressure receiving plate 4,
The pressure receiving plate 4 is placed at the place where the anchor tension member 10 is placed.

Subsequently, the core 2 is placed on the pressure receiving plate 4 such that the exposed portion of the anchor tension member 10 passes through the center hole 2a of the core 2 in the same manner as described above. The pressure receiving plate 4 and the core portion 2 are fixed and integrated by welding or the like in a state where they are centered (see FIG. 4A). Further, the arm 3 is placed on the pressure receiving plate 4 in such a manner that one of its plane portions is closer to the ground surface, and the end of the arm 3 is welded to each side of the core 2 and fixed. The plate 4 and the arm 3 are fixed by welding or the like, respectively, and integrated (see FIG. 4B), and the assembly as the pressure receiving frame 1 is completed at the place where the anchor tension member 10 is set.

Further, if necessary, after filling the gap between the pressure receiving plate 4 and the ground 50 with a predetermined filler, the core portion 2 is fixed to the anchor tension member 10 to fix the entire pressure receiving frame 1 to the ground 50. If the installation is completed. On the other hand, in the anchoring state on the surface of the ground 50, in the core portion 2 integrally fixed to the tensioned anchor tension member 10, the tension of the anchor tension member 10 is changed to the side portion via the upper surface of the core portion 2. And transmitted to the inner rib 2b as a compressive stress toward the ground surface side.

The compressive stress transmitted to the side surface of the core portion 2 and the rib 2b is applied to a predetermined portion of the side surface to which the side end of the rib 2b is joined, and further to the arm portion 3 fixed to the outside.
It is transmitted as a force toward the surface of the ground. Thus, the force transmitted to the end of each arm 3 toward the surface of the ground is finally applied as a pressing force from the lower surface of the pressure receiving plate 4 to the ground 50, and the ground 5
0 can be held. Since the end of the arm 3 faces the end of the rib 2b across the side surface of the core 2, the arm 3 receives the force from the anchor tension member 10 toward the ground surface side and the arm 3 from the rib 2b. The force can be transmitted through the shortest path to the pressure receiving frame 1, and the strength of the entire pressure receiving frame 1 can be increased without waste.

As described above, in the pressure receiving frame according to the present embodiment, the core 2, the arm 3, the pressure receiving plate 4, and the adjusting plate 5 which are transported in a divided state to the anchor construction site.
Are assembled together in the field and the anchor tension member 10 is assembled.
And the force from the anchor tension member 10 is transmitted as a pressing force to the surface of the ground 50, so that the divided structure facilitates loading into the site and improves the efficiency of the entire anchoring work. In addition, the construction can be performed even in places where construction was difficult, and a structure that can secure a predetermined strength and pressure receiving area in the final assembled state in spite of the divided structure enables weight reduction and cost reduction accompanying optimization of strength. Further, the ground 50 of the anchor tension member 10 is formed by the tension member through hole 5a of the adjustment plate 5 fitted to the center portion of the pressure receiving plate 4.
Can be tolerated from the center of the pressure receiving plate 4 due to the inclination from the vertical direction to the anchor tension member 10 even when the anchor tension member 10 is inclined at a predetermined angle from the vertical direction with respect to the ground 50. Core part 2
The pressure receiving frame is installed and fixed through the center hole 2a of the base member, and the ground 50 can be reliably held in an appropriate manner corresponding to the inclination of the anchor tension member 10.

(Second Embodiment of the Present Invention)
Will be described with reference to FIGS. 6 and 7. FIG. FIG. 6 is a perspective view showing an installation state of the ground anchor pressure receiving frame according to the present embodiment, and FIG. 7 is an explanatory view of an arm mounting state in the ground anchor pressure receiving frame according to the present embodiment.

In each of the drawings, the pressure receiving frame 1 according to the present embodiment includes a core 2, an arm 3, a pressure receiving plate 4, and an adjusting plate 5, as in the first embodiment, but differs from the first embodiment. And four arm fixing portions 6 arranged substantially in a cross shape around the core portion 2. The arm portions 3 are inserted and fixed to the arm fixing portions 6, and are arranged symmetrically about the core portion 2. It has a configuration as follows.

The arm fixing portion 6 is formed of a substantially box-shaped body having an open end at a size large enough to allow the end of the arm 3 to be inserted. Are arranged on the respective side surfaces of the core portion 2 in a protruding state. The arm fixing part 6 is integrally fixed to each side surface of the core part 2 by welding or the like from the beginning.

As in the first embodiment, the arm portion 3 is formed of a member having a substantially H-shaped cross section in which two plane portions are continuous in parallel. After the part is inserted with the lower side, it is fixed to the arm fixing part 6 by bolting, pin insertion, welding or the like, and is arranged in a substantially cross shape with the core part 2 as a center. Next, the assembling operation of the pressure receiving frame based on the above configuration and the state of load transmission after fixing will be described. First, after the core part 2, the arm part 3, the pressure receiving plate 4, and the adjusting plate 5 are separately carried into the site, respectively, the adjusting plate 5 is adjusted beforehand in the same manner as in the first embodiment. The fitted pressure receiving plate 4 is placed at the place where the anchor tension member 10 is placed, and then the core portion 2 integrated with the arm fixing portion 6 is placed on the pressure receiving plate 4, and The core part 2 and the arm fixing part 6 are respectively fixed by welding or the like to be integrated.

The arm 3 is inserted into the arm fixing portion 6 on each side surface of the core 2 while the arm 3 is placed on the pressure receiving plate 4 in such a manner that one of the plane portions thereof is closer to the ground surface. Then, the end of the arm portion 3 is fixed to the arm fixing portion 6 by welding, pinning, bolting, or the like, and the pressure receiving plate 4 and the arm portion 3 are fixed to each other by welding or the like (see FIG. 7), and are anchored. At the place where the tension member 10 is placed, the pressure receiving frame 1
As a completed assembly state.

Further, if necessary, the gap between the pressure receiving plate 4 and the ground 50 is filled with a predetermined filler, and then the core portion 2 is fixed to the anchor tension member 10 to fix the entire pressure receiving frame 1 to the ground 50. . On the other hand, in the anchoring state on the surface of the ground 50, similarly to the first embodiment, the tension of the anchor tension member 10 in the core portion 2 integrally fixed to the tensioned anchor tension member 10 is: The compressive stress is transmitted to the side surface portion and the inner rib 2b via the upper surface of the core portion 2 as a compressive stress toward the ground surface side.

The compressive stress transmitted to the side portion of the core portion 2 and the rib 2b is applied to a predetermined portion of the side portion to which the side end of the rib 2b is joined, the arm fixing portion 6 fixed to the outside, and the arm The force is transmitted to the arm portion 3 fixed in the fixing portion 6 as a force toward the ground surface side. Thus, the force transmitted to the end of each arm portion 3 toward the ground surface is finally applied as a pressing force from the lower surface of the pressure receiving plate 4 to the surface of the ground 50, and the ground 50 can be held.

As described above, in the pressure receiving frame according to the present embodiment, the substantially box-shaped arm fixing portion 6 is integrally provided on the side surface of the core portion 2, and the arm portion 3 is inserted into the arm fixing portion 6. -Since the arm 3 and the core 2 can be integrated by being fixed, the arm 3 can be easily inserted into the core 2 by inserting the arm 3 into the arm fixing portion 6 in a precise positional relationship. The efficiency of the frame assembling operation can be further improved, and the structure can be easily assembled on site, but the predetermined strength is secured at the fixed position between the arm 3 and the core 2 to securely hold the ground 50. it can.

(Third Embodiment of the Present Invention) The third embodiment of the present invention
The embodiment will be described with reference to FIGS. 8 is a perspective view showing an installation state of the ground anchor pressure receiving frame according to the present embodiment, FIG. 9 is a partially cutaway plan view and a partially cutaway front view of the ground anchor pressure receiving frame according to the present embodiment, and FIG. It is an explanatory view of an arm part attachment state in a ground anchor pressure receiving frame concerning this embodiment.

In each of the figures, the pressure receiving frame 1 according to the present embodiment comprises a core 2, an arm 3, a pressure receiving plate 4, an adjusting plate 5, an arm fixing portion 6, as in the second embodiment.
On the other hand, the difference is that the arm fixing portion 6 is formed of a pair of substantially plate-like bodies projecting to the outside of the core portion 2 and the pressure receiving plate 4 projects to a plurality of predetermined locations toward the ground surface side. And has a configuration in which a protruding portion 4b is provided.

The core portion 2 is formed by integrally combining a plurality of substantially plate-like members into a substantially box-like member having a substantially rectangular planar shape similar to that of the first embodiment. In this configuration, a plurality of substantially plate-shaped bodies forming predetermined side surfaces are extended outward by a predetermined length to form arm fixing portions 6. The arm fixing part 6
Is formed of a pair of substantially plate-like bodies which are parallel to each other at an interval capable of sandwiching the ends of the arms 3 and project from each side of the core 2 in a direction substantially perpendicular to the ground surface. This is a configuration that is assembled and arranged. Two of the arm fixing portions 6 have a substantially plate-like body forming the core portion 2 extending directly from the side surface of the core portion 2 (see FIG. 9A). Are provided integrally with the core 2 from the beginning.

As in the first embodiment, the arm portion 3 is formed of a member having a substantially H-shaped cross-section in which two plane portions are continuous in parallel. After being inserted between the bodies with one flat portion as the lower side, it is fixed to the arm fixing portion 6 by bolting, pin insertion, welding, or the like, and is arranged in a substantially cross shape with the core portion 2 as a center. The pressure receiving plate 4 is configured to have a plurality of protrusions 4b that project to the ground surface side at a plurality of places that do not overlap with the core portion 2 and the arm portion 3 so as to be adjustable in the amount of protrusion and that can be grounded on the ground surface (see FIG. 9). ), The distance between the pressure receiving plate 4 and the surface of the ground when the pressure receiving plate 4 is installed on the ground 50 can be appropriately set by adjusting the amount of protrusion of each protrusion 4b.

Next, the assembling operation of the pressure receiving frame based on the above configuration and the state of load transmission after fixing will be described. First, the core part 2, the arm part 3, the pressure receiving plate 4, and the adjusting plate 5
Are separately carried into the site, and the pressure receiving plate 4 in which the adjustment plate 5 has been fitted in advance in the adjustment of the fitting positional relationship is placed at the place where the anchor tension member 10 is to be placed, as in the first embodiment. Then, the core portion 2 is placed on the pressure receiving plate 4, and the pressure receiving plate 4, the core portion 2, and the arm fixing portion 6 are fixed by welding or the like to be integrated. In addition, the pressure receiving plate 4 is in a state of floating from the ground 50 when the protruding portion 4b is grounded.

The arm 3 is placed on the pressure receiving plate 4 in such a manner that one of its plane portions is closer to the surface of the ground, and a substantially parallel plate is formed as an arm fixing portion 6 on each side surface of the core 2. The end of the arm 3 is inserted from above or from the side between the bodies, and the end of the arm 3 is fixed to the arm fixing part 6 by welding, pinning, bolting, etc., and the pressure receiving plate 4 and the arm 3 are fixed. Are fixed together by welding or the like (see FIG. 10), and the pressure receiving frame 1
As a completed assembly state.

Further, the size of the protruding portion 4b of the pressure receiving plate 4 which is grounded is adjusted in accordance with the unevenness of the ground, so that the pressure receiving plate 4 is properly grounded to the ground 50. After filling the gap between the pressure receiving plate 4 and the ground 50 with a predetermined filler, the core portion 2 is fixed to the anchor tension member 10 and the entire pressure receiving frame 1 is fixed to the ground 50.

On the other hand, in the state of being fixed on the surface of the ground 50, as in the first embodiment, the core 2 fixed integrally to the anchor tension member 10 to which tension is applied is used.
The tension of the anchor tension member 10 is transmitted to the side surface portion via the upper surface of the core portion 2 as a compressive stress toward the ground surface side.
The compressive stress transmitted to the side surface of the core portion 2 is applied to the arm fixing portion 6 integrally fixed to the outside of the core portion 2 and the arm portion 3 fixed within the arm fixing portion 6 to the ground surface side. It is transmitted as a force toward The force transmitted to the end of each arm 3 toward the surface of the ground is finally applied to the pressure receiving plate 4.
Is applied as pressing force to the ground 50 from the lower surface of the base 50, and the ground 50 can be held. Since the end of the arm portion 3 is fixed to the arm fixing portion 6 integrated with the core portion 2, the core portion 2 receives the force from the anchor pulling member 10 toward the ground surface side and passes through the integrated arm fixing portion 6. The force can be transmitted to the arm 3 via the shortest path, and the strength of the entire pressure receiving frame 1 can be increased without waste in the force transmission path.

As described above, in the pressure receiving frame according to the present embodiment, the arm fixing portion 6 having a simple structure composed of a substantially plate-like body is integrally provided on the side surface of the core portion 2, and the arm portion 3 is provided.
Can be inserted into and fixed to the arm fixing portion 6 to integrate the arm portion 3 and the core portion 2. Therefore, when the arm portion 3 is inserted and fixed to the arm fixing portion 6, the arm portion 3 can be quickly integrated with the core portion 2. The efficiency of the pressure receiving frame assembling work can be further improved, and the structure can be easily assembled at the site, but the predetermined strength is secured at the fixed position between the arm 3 and the core 2 to reliably press the ground. Can hold. Further, a plurality of protrusions 4b are arranged on the ground surface side of the pressure receiving plate 4, and the distance between each position of the pressure receiving plate 4 and the ground surface can be adjusted by changing the amount of protrusion of each protrusion 4b. The ground contact state to the ground 50 can be optimized to cope with unevenness of the ground 50, and the ground 50 can be reliably pressed and held. Further, the pressure receiving plate 4 is placed in a state of being lifted from the ground 50, and after filling the gap between the pressure receiving plate 4 and the ground 50 with a predetermined filler, the anchor tension member 1
It can also be fixed to the ground 50 by fixing it to 0, and the pressing force can be reliably dispersed and the ground 50 can be firmly held.

In the pressure receiving frame according to the above-described embodiment, the arm fixing portion 6 at a predetermined position is formed as an extension of a substantially plate-like body forming the core portion 2 so as to be integrally formed with the core portion 2 so as to be continuous therewith. However, in addition to this, the arm fixing part 6
And the core portion 2 may be separated from each other, and an end of a separate substantially plate-shaped body serving as the arm fixing portion 6 may be integrally fixed to the core portion 2 and disposed.

Further, in the pressure receiving frame according to each of the first to third embodiments, the arm portion 3 is configured to be a member having a substantially H-shaped cross section. However, the present invention is not limited to this. It is also possible to adopt a configuration in which a member having a shape in which a plane portion continuous for a predetermined length, such as a substantially U-shaped cross-sectional shape, a square or a triangular cross-sectional shape, is positioned on the outer periphery and can be in close contact with the pressure receiving plate 4, High strength can be realized with a simple structure. Further, the planar shape is not limited to the cross-shaped configuration in which the four arm portions 3 are fixed to the core portion 2. The core portion 2 is a substantially box-shaped body whose planar shape is a polygon other than a quadrangle, and A predetermined number of arm portions 3 corresponding to the number of side surfaces of each of the core portions 2 are fixed substantially radially to the core portion 2, respectively.
It is also possible to adopt a configuration having a predetermined symmetric shape other than the cross shape with the center as the center.

In the pressure receiving frame according to each of the first to third embodiments, the core 2, the arm 3, the pressure receiving plate 4, and the like are all made of steel plates. Instead, it can be made of a lightweight and high-strength FRP. Further, in the pressure receiving frame according to each of the first to third embodiments, the separate arm portions 3 are radially arranged with respect to the core portion 2, but the present invention is not limited to this. The arm tension member 10 is penetrated to a predetermined length obtained by adding the width of the core portion to the length of two arm portions and to an intermediate position as two arm portions 3 fixed to predetermined two opposite side surfaces. A predetermined shape member having a hole formed therein may be penetrated through the core portion 2 and the exposed portions from the core portion 2 may be configured as the arm portions 3, respectively, so that the strength as a pressure receiving frame can be increased with a simple structure. .

[0052]

As described above, according to the present invention, a substantially box-shaped core portion, a plurality of arm portions having a continuous flat portion, and a symmetric flat pressure receiving plate are combined and integrated. By fixing to the anchor tension member in this integrated state and holding the ground, the place to assemble and integrate can be arbitrarily selected, and it can be assembled at the anchor construction site,
The core, arm, and pressure plate can be carried in a split state, which makes it easy to carry them into the site and can be carried out even in situations where construction was difficult in the past.It can be applied to various places and improves the overall work efficiency. It has the effect that it can be achieved. Also, even if lightweight and simple members are used for each part,
In the final assembled state, a predetermined strength and a pressure receiving area can be secured, so that the strength corresponding to the ground holding force can be optimized and the cost can be reduced.

Further, according to the present invention, an adjusting plate fitted to the pressure receiving plate is provided, and the fitting relationship between the adjusting plate and the pressure receiving plate is adjusted to appropriately set the orientation of the tension member through hole with respect to the pressure receiving plate. Then, since the displacement of the anchor tension member from the center of the pressure receiving plate due to the inclination from the vertical direction with respect to the ground can be tolerated in the range of the tension member through hole, the anchor tension member is cast at a predetermined angle from the vertical direction with respect to the ground. Even when the anchor tension member is easily passed through the center hole of the core part, the pressure receiving frame can be installed, and the anchor tension member can be fixed as it is by tensioning the anchor tension member without generating stress in the bending direction. This has the effect that the ground can be reliably held in an appropriate manner in response to the inclination of the ground. Furthermore, by adjusting the position of the tension member through hole of the adjustment plate, the degree of freedom of the ground anchor placing angle can be increased, and not only the thin and bendable anchor tension member, but also a high strength anchor tension member which is difficult to bend but has no problem. It can be used, and has the effect of increasing the ground holding power.

Further, according to the present invention, the substantially box-shaped arm fixing portion is integrally provided on the side surface of the core portion, and the arm portion is inserted into and fixed to the arm fixing portion to integrate the arm portion and the core portion. This allows the arm part to be inserted into the arm fixing part and easily assembled to the core part in an accurate positional relationship, further improving the efficiency of the pressure receiving frame assembling work and facilitating on-site Although the structure is such that the arm can be assembled in a fixed manner, a predetermined strength can be secured at the fixed position between the arm and the core, and the ground can be surely pressed and held.

Further, according to the present invention, an arm fixing portion made of a substantially plate-like body is integrally provided on the side surface of the core portion, and the arm portion is inserted into and fixed to the arm fixing portion, thereby connecting the arm portion and the core portion. By being integrated, the arm can be quickly integrated with the core by inserting the arm into the arm fixing part of a simple structure and fixing it together, and the efficiency of the pressure receiving frame assembling work can be further improved, While having a structure that can be easily assembled on site, there is an effect that a predetermined strength is secured at the fixed position between the arm portion and the core portion, and the ground can be reliably pressed and held.

Further, according to the present invention, a plurality of protruding portions whose protruding amount can be adjusted are provided on the surface side of the ground of the pressure receiving plate, and the protruding amounts of the respective protruding portions are changed so that the pressure receiving plate is placed on the ground. Since the distance between each position of the pressure receiving plate and the surface of the ground can be adjusted, the grounding state of the pressure receiving plate to the ground can be optimized to cope with unevenness of the ground, and the effect of reliably pressing and holding the ground can be obtained. Furthermore, by placing the protruding portion on the ground, the pressure receiving plate can be placed in a state of being floated from the ground, and if necessary, after filling the gap between the pressure receiving plate and the ground with a predetermined filler, the anchor tension member and It has the effect of being able to be fixed and fixed to the ground and to be able to reliably disperse the pressing force, transmit it to the ground and hold it firmly.

Further, according to the present invention, the substantially plate-like body forming the core portion is extended outward to become the arm fixing portion, and the force from the anchor pulling member is applied to one substantially formed of the core portion and the arm fixing portion. By transmitting the force to the arm through the plate-shaped body and then from the arm to the ground surface via the pressure receiving plate, the flow of force from the anchor tension member is smoothed, and the effect that the ground can be pressed efficiently by the pressure receiving plate is achieved. Have. Further, there is an effect that the cost can be reduced by simplifying the connection structure between the core portion and the arm fixing portion, and the strength can be greatly improved by integration as a member.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an installation state of a ground anchor pressure receiving frame according to a first embodiment of the present invention.

FIG. 2 is a partially cutaway plan view and a bottom view of the ground anchor pressure receiving frame according to the first embodiment of the present invention.

FIG. 3 is an explanatory view of an adjustment plate fitting state of the ground anchor pressure receiving frame according to the first embodiment of the present invention.

FIG. 4 is an explanatory view of an assembling process of the ground anchor pressure receiving frame according to the first embodiment of the present invention.

FIG. 5 is an explanatory view showing a state in which the anchor tension member penetrates into the ground anchor pressure receiving frame according to the first embodiment of the present invention.

FIG. 6 is an installed perspective view of a ground anchor pressure receiving frame according to a second embodiment of the present invention.

FIG. 7 is an explanatory view of an arm portion mounting state in a ground anchor pressure receiving frame according to a second embodiment of the present invention.

FIG. 8 is a perspective view showing an installation state of a ground anchor pressure receiving frame according to a third embodiment of the present invention.

FIG. 9 is a partially cutaway plan view and a partially cutaway front view of a ground anchor pressure receiving frame according to a third embodiment of the present invention.

FIG. 10 is an explanatory view of an arm portion mounting state in a ground anchor pressure receiving frame according to a third embodiment of the present invention.

FIG. 11 is a plan view of a conventional pressure receiving frame for a ground anchor.

FIG. 12 is a cross-sectional view of a conventional ground anchor pressure receiving frame.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 100 Pressure receiving frame 2, 101 Core part 2a, 101a Center hole 2b Rib 3, 102 Arm part 4 Pressure receiving plate 4a Fitting hole 4b Projection part 5 Adjustment plate 5a Tension member through hole 6 Arm fixing part 10 Anchor tension member 50 Ground 103 bottom plate

Claims (6)

[Claims] 1. An anchor tension member having at least a core portion having a central hole in a penetrating state and a plurality of arms arranged radially about the core portion, one end of which is fixed to the ground. In a pressure anchor frame for a ground anchor, which is installed on the ground surface in a state where the end side ground exposed portion is passed through the center hole of the core portion, and the ground exposed portion of the anchor tension member is integrally fixed and fixed to the ground surface, A pressure receiving plate formed of a substantially plate-like body having a predetermined plane shape symmetrical with respect to a center position and having a through hole formed in a center portion, wherein the arm portion is continuous from one end side to the other end side in the longitudinal direction. The core portion is formed of a substantially box-like body having a plurality of portions for fixing the end portion of the arm portion on a peripheral side surface, and the core portion is formed in a central portion. A central hole The core portion is aligned with the pressure receiving plate center with the pressure receiving plate center before being integrated with the ground exposed portion of the anchor pulling member. A ground fixed to the pressure receiving plate in such a manner that the flat part of the arm part is closer to the surface of the ground, and the end part of the arm part is fixed to a side part of the core part, and the ground is integrally assembled. Pressure receiving frame for anchor. 2. The pressure receiving frame for a ground anchor according to claim 1, wherein the tension member through-hole is formed of a substantially plate-like body having a plane shape symmetrical with respect to a center point and extends from the center portion to a predetermined position near an outer periphery. A fitting plate provided with an adjusting plate to be drilled, wherein the through hole of the pressure receiving plate has a predetermined planar shape, and the adjusting plate is fitted at a position where the center of the pressure receiving plate and the center of the adjusting plate substantially coincide with each other. The adjusting member is fitted into the fitting hole and integrated with the pressure receiving plate in a positional relationship such that the tension member through hole has a predetermined direction with respect to the pressure receiving plate. A pressure receiving frame for a ground anchor, wherein the anchor tension member passed through a core portion can be shifted from the center of a pressure receiving plate within a range of the tension member through hole. 3. The ground anchor pressure receiving frame according to claim 1 or 2, wherein the arm portion end fixing portion of the core portion is formed of a substantially box-shaped body having at least one open end. A plurality of arm fixing portions provided in a protruding state on the peripheral side surface of the core portion while an opening portion is located on a side farthest from the core portion, and an arm portion end portion from the opening portion of the arm fixing portion. A pressure receiving frame for a ground anchor, wherein the core portion and the arm portion are integrated by fixing the arm portion and the arm fixing portion by integrally inserting the arm portion and the arm fixing portion. 4. The pressure receiving frame for a ground anchor according to claim 1 or 2, wherein the arm portion end fixing portion of the core portion is parallel to each other at an interval capable of holding an arm end portion. A plurality of sets of arm fixing portions, each of which is formed of a set of substantially plate-like bodies and is disposed in a protruding state on the peripheral side surface of the core portion in a direction substantially perpendicular to the ground surface, A pressure receiving frame for a ground anchor, wherein an end portion of an arm portion is inserted between the bodies, and the end portion of the arm portion and the arm fixing portion are integrally fixed to integrate the core portion and the arm portion. 5. The ground anchor pressure receiving frame according to any one of claims 1 to 4, wherein the pressure receiving plate is capable of adjusting an amount of protrusion toward a ground surface side at a plurality of locations not overlapping with the core portion and the arm portion. It has a plurality of protruding portions that protrude and can be grounded on the ground surface, and adjusts a protruding amount of the protruding portion to appropriately set an interval between the pressure receiving plate and the ground surface when the pressure receiving portion is installed on the ground. A pressure receiving frame for a ground anchor. 6. The pressure receiving frame for a ground anchor according to claim 3 or 4, wherein the core portion is a substantially box-like body obtained by integrally combining a plurality of substantially plate-like bodies. A pressure receiving frame for a ground anchor, wherein one or a plurality of the substantially plate-shaped bodies constituting a body are extended outward by a predetermined length to form at least a part of the arm fixing portion.