JP2926090B2 - Earth retaining anchor structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a retaining panel, a sheet pile,
The present invention relates to a retaining anchor structure in which a retaining structure such as a pile is disposed along a ground and supported by an anchor cast in the ground.

[0002]

2. Description of the Related Art As shown in FIG. 5, when an earth retaining structure 2 such as a concrete retaining wall block is erected at a predetermined distance from a ground 1, and the earth retaining structure is supported by an anchor 3, The drilling hole 4 provided in the ground for anchoring the anchor 3 is sufficiently filled to inject the hardening material 5,
In order to discharge all the internal water (breathing water) to the outside and improve the quality of the hardening material 5, the hardening material 5 is inclined so as to become deeper toward the bottom. In this case, the hardening material 5 can be eliminated by sequentially filling the hardening material 5 from the bottom and pushing up the breathing water.

[0003] When the earth retaining structure 2 is fixed straight at the tip of the anchor 3 by extending straight from the excavation hole 4, the anchor head is attached obliquely to the surface of the earth retaining structure 2. A dispersed load of earth pressure is applied to the lower end of the structure 2 together with its weight, and a large local stress may be generated.

[0004] Accordingly, the applicant has filed Japanese Patent Application No.
In Japanese Patent No. 8222 (JP-A-5-311666), as shown in FIG. 5, the anchor 3 coming out of the excavation hole 4 is bent by a predetermined angle to be horizontal, and the earth retaining structure 2 is attached to the tip of this horizontal portion.
Was fixed.

[0005] In the figure, 6 is a main pillar made of H-shaped steel, 7 is a protective tube which covers the bent portion of the anchor 3, and 15 is a tension member in the middle of the anchor 3.

[0006]

By fixing the earth retaining structure 2 horizontally with the anchors 3 as described above, it is possible to efficiently cope with the earth pressure load. However, in the anchor structure shown in FIG. Since the bending is performed gradually so as to draw an arc, the bending angle cannot be so large. This is because if the bending angle is large, the protection tube 7 hits, and a concentrated load is generated in this portion, which may cause damage.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned disadvantages of the prior art, and to fix an end of an anchor disposed in a borehole which is inclined so as to become deeper as it goes to the bottom of the ground, and to anchor the anchor coming out of the borehole. Is bent at a predetermined angle to make it horizontal, and in the earth retaining anchor structure for fixing the earth retaining structure at the tip of this horizontal part, the earth retaining anchor in which a stable bent portion of the anchor can be obtained at a relatively large angle with a simple configuration. It is to provide a structure.

[0008]

In order to achieve the above object, the present invention fixes an end of an anchor disposed in an excavation hole which is inclined so as to become deeper toward the bottom of the ground,
The anchor coming out of the borehole is bent at a predetermined angle to make it horizontal, and in the earth retaining anchor structure for fixing the earth retaining structure at the tip of this horizontal part, a hinged metal fitting with a bolt is provided at the bent part of the anchor at the predetermined angle. Then, the bent portion of the hinge fitting is covered with a protective tube, and the inside of the protective tube is filled with protective oil, or, in addition to this configuration, a screw socket is attached to the hinged fitting with the end of the anchor and a bolt. Forming
The gist of the invention is to connect the sockets to each other with bolt pins.

[0009]

According to the first aspect of the present invention, the hinge metal can be freely bent at the axis by the bolt, so that the anchor can be easily bent at a predetermined angle through this portion.

According to the second aspect of the present invention, in addition to the above-described operation, the hinge metal can be easily set in the middle of the anchor by coupling the socket and the bolt pin, and the bolt pin is screwed deeply into the socket. Tensions can be made possible by doing so.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view of an essential part showing an embodiment of an earth retaining anchor structure according to the present invention, and FIG. 4 is a longitudinal sectional side view of the whole. The same components as those in FIG. It was done.

That is, an earth retaining structure 2 such as a concrete retaining wall block is erected at a predetermined distance from a ground 1 composed of a bedrock 1a and a topsoil 1b. The excavation hole 4 is filled with a hardening material 5 so that the anchor 3 is fixed.

The anchor 3 coming out of the excavation hole 4 is bent at a predetermined angle to make it horizontal, and the earth retaining structure 2 is fixed to the tip of this horizontal portion.

According to the present invention, the hinged hardware 9 using the bolt 8 is provided to bend the anchor 3 in this manner. As shown in FIG. 2 and FIG. 3, the hinge hardware 9 is formed by fitting the ends of the screw socket 9a as a male part and a female part, penetrating with a bolt 8, fitting a nut 10 to the other end of the bolt 8, and coming out. Prevention.

On the other hand, a screw socket 11 is also provided at the end of the anchor 3.
The screw socket 9a of the hinge hardware 9 and the screw socket 11 at the end of the anchor 3 are connected to each other by bolt pins 12. The bolt pin 12 has a pivot hole 12a formed in the center.

In this manner, the bolt pin 12 is screwed into the screw socket 9a or the screw socket 11 to connect the anchor 3 and the hinge hardware 9, and the bolt pin 12 is turned to further deepen the screw socket 9a or the screw. By screwing into the socket 11, tension can be applied to the anchor 3.

Since the hinge hardware 9 is bent around the bolt 8, a predetermined angle is set so that the anchor 3 filled with the hardening material 5 such as mortar and fixed is horizontal at the place where the anchor 3 exits the excavation hole 4. You can bend and be tense.

The bent portion of the hinge hardware 9 is covered with a protective tube 7 and the inside thereof is filled with a synthetic oil 13 as a protective oil. The anchor 3 is a main pillar 6 of the earth retaining structure 2.
The bolts 14 may be projected from the main pillar 6 by welding or the like and screwed into the screw socket 11 at the end of the anchor 3.

[0019]

As described above, the earth retaining anchor structure of the present invention fixes the end of the anchor disposed in the excavation hole which is inclined so as to become deeper toward the bottom of the ground.
The anchor coming out of the excavation hole is bent at a predetermined angle to make it horizontal, and in the earth retaining anchor structure for fixing the earth retaining structure at the tip of this horizontal part, the bent part of the stable anchor is relatively simple at a relatively large angle. It is obtained.

[Brief description of the drawings]

FIG. 1 is a side view of a main part showing one embodiment of an earth retaining anchor structure of the present invention.

FIG. 2 is an exploded front view of a bending portion of the anchor.

FIG. 3 is a plan view of a hinge hardware.

FIG. 4 is an overall vertical sectional front view showing one embodiment of the earth retaining anchor structure of the present invention.

FIG. 5 is a longitudinal sectional front view showing a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Ground 1a ... Rock 1b ... Top soil 2 ... Earth retaining structure 3 ... Anchor 4 ... Excavation hole 5 ... Hardening material 6 ... Main pillar 7 ... Protection tube 8 ... Bolt 9 ... Hinge hardware 9a ... Screw socket 10 ... Nut 11 ... Screw socket 12 ... Bolt pin 12a ... Hole 13 ... Synthetic oil 14 ... Bolt pin 15 ... Intermediate tension member

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E02D 5/80 E02D 17/04

Claims (2)

(57) [Claims] 1. An anchor disposed in an excavation hole which is inclined so as to become deeper as it goes to the bottom of the ground, is anchored, and an anchor coming out of the excavation hole is bent by a predetermined angle to be horizontal, and the horizontal portion In the earth retaining anchor structure for fixing the earth retaining structure at the tip of the anchor, a hinged metal fitting with a bolt is arranged at a bent part of the anchor at a predetermined angle, and the bent part with the hinge metal is covered with a protective tube, An earth retaining anchor structure characterized by filling the inside of a pipe with a protective oil. 2. A retaining anchor structure according to claim 1, wherein a screw socket is formed on the hinged metal fitting attached to the end of the anchor and the bolt, and the sockets are connected to each other with a bolt pin.