JP2001323474A - Pressure-receiving frame for ground anchor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pressure-receiving frame for a ground anchor, enabling both weight reduction and securement of strength, relaxing installation condition and reducing the labor and cost of entire anchor construction work by arranging ribs appropriately around a central through hole to from a structure with increased strength to thus enable weight reduction while maintaining strength. SOLUTION: The end on the side face of each arm portion 3 near a core portion 2 is secured to the outside of a corner of the core portion 2, and four ribs 4 are arranged from the inside of the corner of the core portion 2 to the portion of the outer peripheral surface of an approximately cylindrical body closest to the corner. Because a force from an anchor tensioning member is transmitted from the center of the core portion 2 to the arm portion 3 through each rib 4 by the shortest course, the tension of the anchor tensioning member 10 can be readily transmitted to the arm portion 3 as a shear force to press the ground. Higher strength can thus be obtained while the size of the frame remains the same, and weight reduction can also be achieved while securing certain strength.

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]

The conventional ground anchor installation work has been carried out as described above. However, since the anchor base is made of concrete, the weight is very heavy.
Unless heavy equipment such as heavy trucks and large cranes are used, transportation and installation cannot be performed, and there is a problem that it is impossible to lift and install the anchor pedestal above the slope on narrow construction sites where heavy equipment can not fit. Was.

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. 10 is a plan view of a conventional ground anchor pressure receiving frame, and FIG. 11 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. However, at present, even in such a pressure receiving frame, it can be applied to places with more severe installation conditions, cost reduction,
In addition, there is a demand for further weight reduction due to a request to suppress an increase in weight accompanying an increase in size corresponding to an increase in ground holding force. However, simply reducing the weight of the steel plate, for example, by reducing its thickness, will reduce the strength. Therefore, regarding the structural improvement of the pressure receiving frame, it has been a new task to achieve both reduction in weight and securing of strength.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and a rib is appropriately arranged around a center hole to which a force from an anchor tension member is transmitted, so that the strength is maintained as it is. An object of the present invention is to provide a pressure anchoring frame for a ground anchor that enables weight reduction, achieves both reduction in weight and securing strength, reduces installation conditions, and reduces labor and cost in the entire anchor work.

[0008]

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 anchoring frame for ground anchor which is fixed to the ground surface, the core portion is fixed to both ends of a predetermined substantially cylindrical body in a state where two substantially plate-shaped bodies having predetermined through holes are substantially parallel to each other. The through hole communicates with both ends of the substantially cylindrical body so that the through hole and the inside of the substantially cylindrical body serve as the center hole, and the arm portion has at least a predetermined substantially plate-like shape. And another substantially plate-like portion substantially orthogonal to the substantially plate-like portion is formed by a predetermined member that is continuous for a predetermined length in the direction of the cross line, and the two substantially plate-like bodies of the core part are substantially plate-like. One of the parts is fixed between two substantially plate-like bodies in a direction of making a substantially right angle and the other substantially parallel, and is radially arranged around a substantially cylindrical body of the core part, A plurality of substantially plate-like members which are fixed to the outer peripheral surface of the substantially cylindrical body and whose upper end and lower end are in close contact with the two substantially plate-like bodies and are radially arranged around the substantially cylindrical body. A body rib, and the rib is integrally connected to one substantially plate-like portion end of the arm portion which is substantially perpendicular to the two substantially plate-like bodies of the core portion.

As described above, according to the present invention, the end of the substantially plate-like portion, which is substantially perpendicular to the ground of the arm, is integrally connected to the rib of the substantially plate-like body projecting from the outer peripheral surface of the substantially cylindrical body of the core. The vertical force from the anchor tension member to the ground is applied to the core by transmitting the force in the vertical direction from the substantially cylindrical body of the core to the ground contact surface of the arm through each member substantially perpendicular to the ground. The tension of the anchor tension member is transmitted as a shear force to the arm part without difficulty, and the ground can be reliably pressed by the arm part, and a higher strength against the tension of the anchor tension member can be obtained. In addition to being able to be installed in places where the installation work environment is severe, cost reduction and labor saving in installation work can be achieved.

Further, the pressure receiving frame for a ground anchor according to the present invention may be formed, if necessary, by extending one substantially plate-like end of the arm portion toward a substantially cylindrical body of the core portion, It is in close contact with the two substantially plate-like bodies of the core part, and is integrally fixed to the outer peripheral surface of the substantially cylindrical body, and also serves as the rib. Thus, in the present invention,
An end portion of the substantially plate-shaped portion of the arm portion near the core portion is extended and fixed to the outer peripheral surface of the substantially cylindrical body of the core portion, while receiving a force from the anchor tension member as a rib directly from the substantially cylindrical body,
The arm transmits the force in the vertical direction to the ground to the ground surface as it is, so that the flow of force from the anchor tension member can be smoothed and the ground can be pressed efficiently by the arm, and the connection between the core and the arm By simplifying the structure, the strength of the arm portion can be improved and the cost can be further reduced.

[0011] In the pressure receiving frame for a ground anchor according to the present invention, the core portion may be formed as a hollow substantially box-like body having the two substantially plate-like bodies as upper and lower surfaces, if necessary. Is formed in a hollow substantially box-shaped body fixed to each side surface of the core portion and radially arranged around the core portion,
An end near the core on the side surface of the substantially box-shaped body is integrated with the core outside the corner of the core, and the rib is
A side end portion of the core portion, which is separated from the substantially cylindrical body, is fixed inside a corner portion of the core portion. As described above, in the present invention, the core portion and the arm portion are formed of a hollow substantially box-shaped body, and the end of the side of the arm near the core is located outside the corner where the sides of the core are adjacent to each other. Along with being integrated with the ribs, the ribs are disposed from the outer peripheral surface of the substantially cylindrical body of the core portion to the inside of the corner portion, and the vertical force on the ground from the anchor tension member is applied to each rib from the substantially cylindrical body of the core portion, In addition, by transmitting the shortest path to the side of the arm through the corner, and finally to the ground contact surface of the arm, the anchor tension applied to the core even in a structure combining a substantially box-shaped body The tension of the member is transmitted as a shear force to the side surface of the arm part without difficulty, and the ground can be reliably pressed on the ground contact surface of the arm part,
In addition to obtaining excellent strength with respect to the tension of the anchor tension member, filling the hollow portion of the substantially box-shaped body can enhance the strength and the ground holding force as in the related art.

Further, the pressure receiving frame for a ground anchor according to the present invention is formed, if necessary, in a substantially cone shape whose diameter increases as the substantially cylindrical body of the core portion approaches the ground surface side. The through-holes of the substantially plate-like body are also formed to have a predetermined diameter along the substantially cylindrical body both-end openings.
As described above, in the present invention, the substantially cylindrical body is formed in a substantially cone shape, and the diameter of the through-hole of the substantially plate-like body is also adjusted to the shape of the opening at both ends of the substantially cylindrical body. By allowing the anchor tension member to be tilted in a predetermined range from a right angle to the pressure receiving frame as a changeable, even when the anchor tension member is disposed on the ground at an angle from a direction perpendicular to the ground surface, it can be easily inserted into the center hole. The pressure receiving frame can be installed through the pressure receiving frame, and the anchor tension member can be fixed to the pressure receiving frame by being tensioned without stress, and the ground can be reliably held.

[0013]

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 plan view of a ground anchor pressure receiving frame according to the present embodiment, FIG. 2 is a front view of the ground anchor pressure receiving frame according to the present embodiment, and FIG. 3 is a ground anchor pressure receiving frame according to the present embodiment. , FIG. 4 is a sectional view taken along line AA of FIG. 1, and FIG. 5 is a sectional view taken along line BB of FIG.
FIG. 6 is a cross-sectional view, and FIG. 6 is a vertical cross-sectional view of a main part of 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 has a core portion 2 of a steel plate hollow substantially box-like body having a center hole 2a and a cone portion 2b as a substantially cylindrical body surrounding the center hole 2a. The core portion 2 is formed of a hollow substantially box-shaped body made of a steel plate and fixed to each side surface of the core portion 2 having no center hole opening portion.
Are formed with four arm portions 3 arranged in a substantially cross shape around the core portion 2 and a substantially square steel plate-like body, wherein the side surfaces are integrated with the core portion 2 outside the adjacent corner portion. Both end portions of the plate-shaped member are integrally fixed to the inside of the corner portion of the core portion 2 and a predetermined portion of the outer peripheral surface of the cone portion 2b, respectively. The cone part 2b is adhered to the inside of the lower surface, respectively.
And four ribs 4 arranged radially around the center.

The core portion 2 is shaped such that the diameter increases as the cone portion 2b approaches the lower side on the ground surface side, and the opening portions on the upper and lower surfaces are formed to have a predetermined diameter along the upper and lower ends of the cone portion 2b. Configuration. The substantially box-shaped steel plate constituting the core portion 2 is sealed when assembly is completed, and any one of the upper and lower ends of the rib 4 cannot be joined by welding. Is welded while the lower side is not welded, and the steel plate forming the upper surface of the core portion 2 has a so-called compression ring effect.

The arm 3 is formed of a box-like body having a substantially right-angled lower surface and a side surface on the ground surface side, and the lower surface is integrally connected to the lower surface of the core 2 as one surface. Each of the core portions 2 is fixed to the core portion 2.
The flow of force is continuous between the lower surface of the arm 3 and the lower surface of the arm 3, and the force can be transmitted without difficulty. Next, a load transmission state in the pressure receiving frame based on the above configuration will be described. In the core portion 2 that is integrally fixed to the tensioned anchor tension member 10 in a state of being installed on the surface of the ground 50, the tension of the anchor tension member 10 comes into close contact with the inside of the upper surface via the upper surface of the core portion 2. It is transmitted to each upper end of the cone portion 2b and the rib 4 as a compressive stress toward the ground surface side.

The compressive stress transmitted to the cone portion 2b and the ribs 4 is applied to the ground such as the ribs 4, the corners of the core 2 to which the side ends are joined, and the side surfaces of the arm 3 fixed to the outside. The force is transmitted to each member substantially perpendicular to the surface as a force toward the same ground surface side, that is, a shear stress. Thus, the force transmitted to the side surface of each arm 3 toward the ground surface is finally applied as a pressing force from the lower surface of the arm 3 to the ground 50, and the ground 50 can be held. Since the tension of the anchor tension member 10 applied to the center of the core portion 2 is transmitted to the arm portion 3 through the rib 4 in the shortest distance, there is no waste in the force transmission path, and the resistance to the entire force of the pressure receiving frame 1, that is, the strength is reduced. Get higher.

As described above, in the pressure receiving frame according to the present embodiment, the side surface of the arm 3 is integrated with the core 2 at the corner of the core 2 and the inside of the corner of the core 2 is Four substantially plate-shaped ribs 4 are disposed between the rib 2 and the outer peripheral surface of the portion 2b, and the force from the anchor pulling member 10 is applied to the core portion through the ribs and other members that are substantially perpendicular to the ground surface. 2 is transmitted from the center part to the ground contact surface of the arm part 3 by the shortest path, so that the tension of the anchor tension member 10 applied to the core part 2 can be easily
The ground 50 can be pressed and the ground can be pressed, the same size as before can be obtained, and higher strength can be obtained, and the weight can be reduced while maintaining a certain strength. In addition to being able to do so, it is also possible to increase the size while maintaining the weight, and to reduce the number of installations due to the increase in the ground holding force, so that it is possible to save labor and reduce costs throughout the anchor work. Also, the center hole 2a in the cone portion 2b
Has a shape that expands toward the lower side, and allows a predetermined range of inclination from a right angle to the pressure receiving frame 1 of the anchor tension member 10, so that the anchor tension member 10 is disposed on the ground 50 at a tilt from a direction perpendicular to the ground surface. It is possible to cope with the situation, and the ground 50 can be held by fixing the anchor tension member 10 to the pressure receiving frame 1 without difficulty.

In the pressure receiving frame according to the embodiment, the core 2 and the arm 3 are formed in a cross shape. However, the present invention is not limited to this. As shown in FIG.
A substantially rectangular bottom plate 5 may be integrally joined to and disposed on the lower surface side of the core portion 2 and the arm portion 3 so that the entire bottom plate 5 is pressed against the ground surface, and a predetermined pressing area is provided. Can be applied to the ground that requires it, and the ground can be reliably held.

Further, in the pressure receiving frame according to the above-described embodiment, the four arms 3 are fixed to the core 2 which is a substantially box-shaped body having a square planar shape. However, the present invention is not limited to this. The core portion 2 is a substantially box-shaped body whose planar shape is a polygon other than a quadrangle, and the arm portions 3 corresponding to the number of side surfaces of the core portion 2
And a predetermined symmetrical shape other than the cross shape with the core portion 2 as the center.

In the pressure receiving frame according to the above-described embodiment, the inside of each of the core portion 2 and the arm portion 3 is configured to be hollow. However, the present invention is not limited to this, and may be installed on the ground surface as necessary. After that, the interior hollow portion can be filled with a filler such as concrete, and the ribs 4 and the like can be firmly fixed by the curing of the filler, so that the strength and the ground holding force as the pressure receiving frame can be further improved.

(Second Embodiment of the Present Invention) The second embodiment of the present invention
Will be described with reference to FIGS. 8 and 9. FIG. FIG. 8 is a perspective view of the ground anchor pressure receiving frame according to the present embodiment, and FIG. 9 is a vertical sectional view of a main part of 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 is a core formed by fixing two substantially rectangular plate-like bodies having a through hole at the center thereof to both ends of a substantially cylindrical cone portion 2b in a parallel state. A substantially T-shaped cross-sectional shape in which a portion 2, an upright portion 3a that is a predetermined plate portion, and a bottom portion 3b that is another plate portion orthogonal to the upright portion 3a continue for a predetermined length in an intersecting direction. The upright portion 3a is perpendicular to the two plate-like bodies of the core portion 2 and the bottom portion 3b is parallel to the two plate-like members. And three end portions of the arm portion 3, the ends of the upright portions 3 a being extended toward the cone portion 2 b of the core portion 2, and the two plate-like portions of the core portion 2 serving as the ribs. It is in close contact with the body, and is integrally fixed to the outer peripheral surface of the cone portion 2b. It is to become configuration.

The core portion 2 has a cone portion 2b having the first shape.
In the same manner as in the first embodiment, the diameter increases toward the lower side which is the ground surface side, and the through-holes of the two plate-like bodies are also formed to have a predetermined diameter along both ends of the cone portion 2b. And a central hole 2a through which the exposed portion of the anchor tension member 10 passes through the through hole and the inside of the cone portion 2b.
This is the configuration. Also, as in the first embodiment, the bottom portion 3b serving as the ground contact portion of the arm portion 3 is also configured to be integrally and continuously provided with the lower plate-like body of the core portion 2, and the core portion The flow of force is continuous between the lower surfaces of the arm 2 and the lower surface of the arm 3 so that the force can be transmitted without difficulty.

Next, a description will be given of a state of load transmission in the pressure receiving frame having the above-described configuration. In the core portion 2 which is integrally fixed to the tensioned anchor tension member 10 in a state of being installed on the surface of the ground 50, the tension of the anchor tension member 10 is transmitted through the plate-like body on the upper side of the core portion 2. Is transmitted as compressive stress toward the ground surface side to the end of the cone portion 2b and the upright portion 3a of the arm portion 3 which are in close contact with the base.

The compressive stress transmitted to the ends of the cone portion 2b and the upright portion 3a is a force directed toward the same ground surface, that is,
The shear stress is transmitted through the upright portion 3a substantially perpendicular to the ground surface, and is finally applied as a pressing force from the lower surface of the bottom surface 3b of the arm portion 3 to the ground 50, so that the ground 50 can be held. Anchor tension member 10 applied to the center of core portion 2
Can be received by the ends of the cone portion 2b and the upright portion 3a and transmitted to each arm portion 3 without waste, so that the resistance to the force of the entire pressure receiving frame 1, that is, the strength is increased.

As described above, in the pressure receiving frame according to the present embodiment, the upright portion 3a, which forms a substantially right angle with the ground of the arm portion 3, is integrally connected to the outer peripheral surface of the cone portion 2b of the core portion 2, and is provided as an anchor as a rib. While receiving the vertical force from the tension member 10 on the ground directly from the upper plate-like body and the cone portion 2b of the core portion 2, the force is transmitted to the lower surface of the bottom portion 3b of the arm portion 3 by the shortest path, and each arm portion 3 By being able to press the ground, the flow of the force from the anchor tension member 10 can be smoothed, and a higher strength with respect to the tension of the anchor tension member 10 can be obtained, and combined with the simple connection structure between the core portion 2 and the arm portion 3, Significant weight reduction and cost reduction, and labor saving in installation work can be achieved.

In the pressure receiving frame according to the above-described embodiment, the arm 3 is formed as a member having a substantially T-shaped cross section. However, the present invention is not limited to this. For example, it is possible to use a member having a substantially plate-shaped portion perpendicular to the ground and another substantially plate-shaped portion orthogonal to the substantially plate-shaped member, and high strength can be realized with a simple structure as described above. Becomes 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, but a predetermined symmetric shape other than the cross shape in which a predetermined number of arm portions 3 are fixed to the core portion 2 in a radial manner. Further, a bottom plate 5 having a predetermined shape may be integrally joined to the lower surfaces of the core portion 2 and the arm portion 3 to form a shape including the bottom plate 5.

Further, in the pressure receiving frame according to the above-described embodiment, the lower plate portion of the core portion 2 and the bottom surface portion 3b of the arm portion 3, which are integrally continuous, are connected to each other by two independent plate members. It is a configuration that is integrated by joining
However, the present invention is not limited to this. As a plate-shaped portion of the upper and lower plate-shaped members of the core portion 2 and an arm portion that is integrally and continuously connected in parallel with these plate-shaped members, a single plate-like member integrally formed with the two from the beginning. It is also possible to adopt a configuration using members, and a series of members occupy predetermined portions of each of the core portion 2 and the arm portion 3 so that the core portion 2 and the arm portion 3 are firmly integrated, so that the whole is very high. Strength can be obtained.

Further, in the pressure receiving frame according to the embodiment, the end of the upright portion 3a of the arm portion 3 is used instead of the rib, but in addition, a substantially plate-like body separate from the upright portion 3 is used. Is fixed to the outer peripheral surface of the cone portion 2b of the core portion 2 and the upper end portion and the lower end portion are brought into close contact with the two plate-like bodies of the core portion 2, respectively.
A plurality of ribs may be arranged radially around the center, and the rib may be integrally fixed to the end of the upright portion 3a of the arm portion 3 to be connected. The core portion 2 and the arm portion 3 are manufactured separately, Even in the case of connecting and integrating later, high strength can be obtained as described above.

Further, in the pressure receiving frames according to the first and second embodiments, the substantially cylindrical body of the core portion 2 uses the cone portion 2b whose diameter increases downward. However, the present invention is not limited to this, and other cylindrical shapes such as a cylindrical body having a constant diameter can be used.

[0031]

As described above, according to the present invention, the end of the substantially plate-like portion, which is substantially perpendicular to the ground of the arm, protrudes from the outer peripheral surface of the substantially cylindrical body of the core. By transmitting the vertical force from the anchor tension member to the ground from the substantially cylindrical body of the core through each member that makes a substantially right angle with the ground in the shortest path from the anchor tensile member to the ground contact surface of the arm, The tension of the anchor tension member applied to the core part is transmitted as a shear force to the arm part without difficulty, and the ground can be reliably pressed by the arm part, and a higher strength with respect to the tension of the anchor tension member can be obtained, and the strength is higher than before. It is possible to reduce the weight while maintaining it, and it is possible to install it in a place where the installation work environment is severe, and it is also possible to reduce the cost and save the labor of the installation work.

Further, according to the present invention, one of the substantially plate-like portions of the arm portion is extended at the end near the core portion and is fixed to the outer peripheral surface of the substantially cylindrical body of the core portion. While receiving the force directly from the cylindrical body, the arm transmits the vertical force to the ground as it is to the ground surface, smoothing the flow of force from the anchor tension member and pressing the ground efficiently with the arm In addition to this, there is an effect that the strength of the arm portion can be improved and the cost can be further reduced by simplifying the connection structure between the core portion and the arm portion.

According to the present invention, the core portion and the arm portion are formed of a hollow substantially box-like body, and the end of the side surface of the arm portion near the core portion is located outside the corner portion where the side surfaces of the core portion are adjacent to each other. The ribs are arranged from the outer surface of the substantially cylindrical body of the core portion to the inside of the corner portion, and the vertical force on the ground from the anchor tension member is applied from the substantially cylindrical body of the core portion. By transmitting the shortest path to each side of the arm through the ribs and corners, and finally to the ground contact surface of the arm, even in a structure that combines a substantially box-shaped body, The tension of the anchor tension member to be added is transmitted as a shear force to the side surface of the arm part without difficulty, so that the ground can be reliably pressed at the ground contact surface of the arm part, and excellent strength against the tension of the anchor tension member can be obtained. In addition to the bets, it has the effect that the conventional same strength and soil retaining strength can be achieved by filling the substantially box-shaped body hollow portion.

According to the present invention, the substantially cylindrical body is formed in a substantially cone shape, and the diameter of the through-hole of the substantially plate-like body is adjusted to the shape of the opening at both ends of the substantially cylindrical body. By allowing the inclination angle to be changed within the range, by allowing the anchor tension member to be tilted in a predetermined range from a right angle to the pressure receiving frame, even when the anchor tension member is disposed on the ground at a tilt from a direction perpendicular to the ground surface, without difficulty. The pressure receiving frame can be installed through the center hole, and the anchor tension member can be fixed to the pressure receiving frame by being tensioned without stress, so that the ground can be reliably held.

[Brief description of the drawings]

FIG. 1 is a plan view of a ground anchor pressure receiving frame according to a first embodiment of the present invention.

FIG. 2 is a front view of the ground anchor pressure receiving frame according to the first embodiment of the present invention.

FIG. 3 is a bottom view of the ground anchor pressure receiving frame according to the first embodiment of the present invention.

FIG. 4 is a sectional view taken along line AA of FIG. 1;

FIG. 5 is a sectional view taken along line BB of FIG. 2;

FIG. 6 is a vertical sectional view of a main part of the ground anchor pressure receiving frame according to the first embodiment of the present invention.

FIG. 7 is a plan view of another ground anchor pressure receiving frame according to the first embodiment of the present invention.

FIG. 8 is a perspective view of a ground anchor pressure receiving frame according to a second embodiment of the present invention.

FIG. 9 is a longitudinal sectional view of a main part of a ground anchor pressure receiving frame according to a second embodiment of the present invention.

FIG. 10 is a plan view of a conventional ground anchor pressure receiving frame.

FIG. 11 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 Cone part 3, 102 Arm part 3a Standing part 3b Bottom part 4 Rib 5, 103 Bottom plate 10 Anchor tension member 50 Ground

Claims (4)

[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, The core portion is formed by fixing two substantially plate-like bodies having a predetermined through hole to both ends of a predetermined substantially cylindrical body in a state of being substantially parallel, and forming the through hole into the substantially cylindrical body. The through hole and the inside of the substantially cylindrical body are respectively defined as the center hole by communicating with both end openings of the body, and the arm portion is at least a predetermined substantially plate portion and another substantially plate substantially orthogonal to the substantially plate portion. In the direction of intersection The two substantially plate-shaped members are formed of a predetermined member having a continuous length, and one of the substantially plate-shaped portions is substantially perpendicular to the two substantially plate-shaped members of the core portion and the other is substantially parallel. The core portion is radially arranged around a substantially cylindrical body of the core portion, and a side end portion is fixed to an outer peripheral surface of the substantially cylindrical body of the core portion, and an upper end portion and a lower end portion are fixed to the two substantially cylindrical portions. A plurality of substantially plate-shaped ribs arranged radially around a substantially cylindrical body in close contact with the plate-like body, wherein the ribs are substantially perpendicular to the two substantially plate-shaped bodies of the core portion; A pressure receiving frame for a ground anchor, wherein the pressure receiving frame is integrally connected to one substantially plate-shaped portion end of the arm portion. 2. The pressure receiving frame for a ground anchor according to claim 1, wherein one end of the substantially plate-shaped portion of the arm is extended toward a substantially cylindrical body of the core, and A pressure receiving frame for a ground anchor, wherein the pressure receiving frame is in close contact with the two substantially plate-like bodies of the portion and is integrally fixed to the outer peripheral surface of the substantially cylindrical body, and also serves as the rib. 3. The pressure receiving frame for a ground anchor according to claim 1, wherein the core portion is formed of a hollow substantially box-shaped body having the two substantially plate-shaped bodies as upper and lower surfaces, and the arm portion includes: The core portion is formed of a hollow substantially box-shaped body fixed to each side surface of the core portion and radially disposed around the core portion, and an end near the core portion on the side surface of the substantially box-shaped body is located outside the corner of the core portion. A pressure receiving frame for a ground anchor, wherein the rib is fixed to a corner end of a core portion at a side end of the core portion, the side end of the core portion away from the substantially cylindrical body. 4. The pressure receiving frame for a ground anchor according to claim 1, wherein the substantially cylindrical body of the core portion is formed in a substantially cone shape whose diameter increases as approaching a ground surface side. The through-holes of the two substantially plate-shaped members are also formed to have a predetermined diameter along both ends of the substantially cylindrical member, respectively.