JPH083993A - Structure of earth retaining anchor - Google Patents

Abstract

PURPOSE:To form a bent portion of an anchor having relatively large angles in a stable manner by disposing an axially mounted hinge fitting provided with a bolt at a predetermined angle bent portion of the anchor. CONSTITUTION:An earth retaining structure 2,is erected so as to be spaced a predetermined interval from the ground and an excavated bore formed in the ground is inclined downwardly toward the bottom of the ground and hardener is filled into the excavated bore to fix an anchor 3. A portion of the anchor 3 protruding from the bore is bent through a predetermined angle to make the portion horizontal and the earth retaining structure 2 is fixed to the end of the horizontal portion. And an axially mounted hinge fitting 9 with a bolt 8 is provided to bend the anchor 3. In the fitting 9, opposed ends of threaded sockets 9a having a male portion and female portion respectively are connected to each other and the bolt 8 is passed therethrough, while a nut is fitted onto the end of the bolt 8 to prevent the bolt from falling out. A threaded socket 11 is fixed to the end of the anchor 3 so that the socket 9a of the fitting 9 and the socket 11 on the end of the anchor 3 are connected by a bolt pin 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an earth retaining panel, sheet pile,
The present invention relates to a soil retaining anchor structure in which earth retaining structures such as piles are arranged along the natural ground and supported by anchors placed in the natural soil.

[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 natural ground 1 and the earth retaining structure is supported by an anchor 3, The excavation hole 4 provided in the natural ground for fixing the anchor 3 is sufficiently filled with the hardening material 5,
In order to discharge all the internal water (breathing water) to the outside and improve the quality of the hardened material 5, the hardened material 5 is inclined so that it becomes deeper toward the bottom. In this way, the hardening material 5 can be sequentially filled from the bottom and the breathing water can be pushed up to be eliminated.

If the earth retaining structure 2 is fixed at the tip of the anchor 3 by extending straight from the excavation hole 4, the attachment of the anchor head to the surface of the earth retaining structure 2 will be slanted, and the earth retaining structure will be fixed. A distributed load of earth pressure is applied to the lower end of the structure 2 together with its weight, which may cause a large local stress.

Therefore, Japanese Patent Application No. 4-14 filed by the applicant earlier
In 8222 (Japanese Patent Laid-Open No. 5-311666), as shown in FIG. 5, the anchor 3 protruding from the excavation hole 4 is bent at a predetermined angle to be horizontal, and the earth retaining structure 2 is attached to the tip of this horizontal portion.
I fixed it.

In the figure, 6 is a main pillar made of H-shaped steel, 7 is a protective tube for covering the bent portion of the anchor 3, and 8 is a tension member in the middle portion of the anchor 3.

[0006]

By fixing the earth retaining structure 2 horizontally with the anchors 3 in this manner, it is possible to efficiently cope with earth pressure loads. In the anchor structure shown in FIG. The bending angle cannot be made so large because it is gradually bent so as to draw an arc to bend it. This is because, if it is barely bent and has a large bending angle, it may hit the protection tube 7 and a concentrated load may be generated at this portion, resulting in damage.

The object of the present invention is to eliminate the disadvantages of the above-mentioned conventional example, to fix the end portion of the anchor arranged in the excavation hole that is inclined so as to become deeper as it goes to the bottom of the ground, and to leave the excavation hole. Is an earth retaining anchor structure in which the earth retaining structure is fixed to the tip of this horizontal portion by bending it at a predetermined angle, and with a relatively large angle, a stable anchor bending portion can be obtained with a simple configuration. To provide the structure.

[0008]

In order to achieve the above-mentioned object, the present invention provides that a shaft-attached hinge metal fitting by a bolt is arranged at a predetermined angle bent portion of the anchor, and an end of the anchor and a shaft-attached hinge by the bolt. The gist of the invention is to form a screw socket on a metal object and to connect the sockets with each other by bolt pins.

[0009]

According to the first aspect of the present invention, since the hinge metal is freely bent by the axis of the bolt, 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 action, 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 deeply screwed into the socket. It is possible to get nervous.

[0011]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a side view of an essential part showing an embodiment of the earth retaining anchor structure of the present invention, and FIG. 4 is a vertical side view of the whole. The same components as those of FIG. It was done.

That is, an earth retaining structure 2 such as a concrete retaining wall block is built in a ground 1 composed of a bedrock 1a and a topsoil 1b at a predetermined distance, and an excavation hole 4 provided in the ground 1 is The anchor 3 is fixed by inclining it so that it becomes deeper as it goes to the bottom, and the hardened material 5 is filled in the drilled hole 4.

The anchor 3 protruding from the excavation hole 4 is bent at a predetermined angle to be horizontal, and the earth retaining structure 2 is fixed to the tip of this horizontal portion.

According to the present invention, the shaft-attached hinge hardware 9 using the bolts 8 is arranged to bend the anchor 3 in this manner. As shown in FIGS. 2 and 3, the hinge hardware 9 is a screw socket 9
The ends of a are fitted to each other as a male part and a female part, penetrated by a bolt 8, and a nut 10 is fitted to the other end of the bolt 8 to prevent slipping out.

On the other hand, the screw socket 11 is also provided at the end of the anchor 3.
Then, the screw sockets 9a of the hinge hardware 9 and the screw sockets 11 at the ends of the anchors 3 are coupled with each other by bolt pins 12. The bolt pin 12 has a hole 12a for rotation in the center.

In this way, the bolt pin 12 is screwed into the screw socket 9a or the screw socket 11 to connect the anchor 3 and the hinge metal 9, and the bolt pin 12 is rotated to deepen the screw socket 9a or the screw. It is also possible to give tension to the anchor 3 by screwing it into the socket 11.

Since the hinge metal 9 is bent about the bolt 8 as an axis, the anchor 3 filled with the hardening material 5 such as mortar and fixed is horizontal at a position where it exits the excavation hole 4. Can be bent and tense.

The bent portion of the hinge metal 9 is covered with a protective pipe 7, and the inside thereof is filled with synthetic oil 13 as protective oil. The anchor 3 is the main pillar 6 of the earth retaining structure 2.
As for the method of connection, the bolt pin 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 portion of the anchor arranged in the excavation hole inclined so as to become deeper as it goes to the bottom of the ground,
The anchor that comes out of the excavation hole is bent at a predetermined angle to make it horizontal, and in the earth retaining anchor structure that fixes the earth retaining structure to the tip of this horizontal portion, the anchor is stable at a relatively large angle with a simple configuration. Is what you get.

[Brief description of drawings]

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

FIG. 2 is an exploded front view of a bent 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 vertical sectional front view showing a conventional example.

[Explanation of symbols]

1 ... Ground 1a ... Rock 1b ... Top soil 2 ... Soil retaining structure 3 ... Anchor 4 ... Excavation hole 5 ... Hardened material 6 ... Main pillar 7 ... Protective tube 8 ... Bolt 9 ... Hinged metal 9a ... Screw socket 10 ... Nut 11 … Screw socket 12… Bolt pin 12a… Hole 13… Synthetic oil 14… Bolt pin

Claims (2)

[Claims] 1. An anchor disposed at an end of an excavation hole that is inclined so as to become deeper toward the bottom of the natural ground is fixed, and the anchor that comes out of the excavation hole is bent at a predetermined angle to be horizontal. In the earth retaining anchor structure for fixing the earth retaining structure to the tip of the, the earth retaining anchor structure is characterized in that the hinged metal fittings by bolts are arranged at the bent portion of the anchor at a predetermined angle. 2. The earth retaining anchor structure according to claim 1, wherein a threaded socket is formed on the end of the anchor and a shaft-attached hinge hardware using bolts, and the sockets are connected to each other by bolt pins.