JPS6059221A - Anchoring work having water weeping effect - Google Patents

Abstract

PURPOSE:To stabilize the ground by removing groundwater as well as obtain a tensile force for anchors by a method in which a perforated protective hollow pipe is inserted into the middle long portion of anchor, and a fixing plate having a drain pipe leading to the perforated protective hollow pipe is provided to the head of the anchor. CONSTITUTION:A tension member 5 is inserted to a fixing portion 1 of a hole 4 drilled in the ground 11, a filling material 6 is packed into the fixing portion 1, and a perforated protective hollow pipe 7 is inserted into the free long portion 2 of an anchor to cover the tension member 5. The tension member 5 is fixed through a fixing plate 9 with nuts 10 to the head 3 of the anchor and then to the ground 11. Since the plate 9 is led to a drain pipe 8 and the hollow pipe 7, groundwater in the ground 11 is discharged through the water conveyance hole 12 of the hollow pipe 7 and the drain pipe 8 from the perforated wall of the hole 4 of the free long portion 2.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an anchor construction method that improves the drainage effect for stabilizing the ground.

Conventionally, an anchor method has been used in which an insertion hole for inserting a tensile material is drilled in advance in the ground, and the tensile material is inserted into this insertion hole and filled with Filler 4A to obtain tensile force and resist forces such as landslides. It will be done. In addition to the method of using force to stabilize the ground, a method of suppressing the instability of the ground by eliminating groundwater, which can cause instability of the ground, is also used.

This invention provides an anchor construction method that solves the two drawbacks and has a drainage effect for obtaining tensile force and at the same time removing groundwater and stabilizing the ground.

Next, embodiments of the present invention will be described based on the drawings. FIG. 1 shows an overall sectional view of the anchor construction method according to the present invention. In the figure, the anchor is composed of a fixing part at the distal end, a free length part 2 and an anchor head 3 at the middle part. First, the tensile material S is inserted up to the anchoring part / of the insertion hole l drilled in the ground //, and after filling the anchoring part / with the filler material B, the tensile material 5 is inserted into the free length part 2 of the anchor. A hole protection hollow tube 7 is inserted to cover the tensile iodine. Next, the tension rod is attached to the anchor head 3 via the fixing plate 9, and the tension suspension is fixed to the ground by means of the fixing plate 9. The fixing plate 9 has a perforated protection pipe 7 for the drainage pipe.
The groundwater in the ground 11 is drained from the hole wall of the anchor insertion hole t of the free length part 2, passes through the water guide hole 12 of the perforated protection pipe 7, and is drained from the drain pipe g. .

Figure 2 shows the details of the covered part of the perforated protection hollow pipe and the tensile cable. It has a structure in which water is introduced into the protection tube 7.

Fig. 3 is a detailed view of the installed state of the drain pipe, in which the drain pipe g is pierced through the fixed platen at an angle downward and communicates with the protective hollow pipe 7 to facilitate drainage of groundwater. It is.

Figure No. 3 is a detailed diagram of another drainage method, in which the perforated protective hollow pipe 7 is omitted and a drainage hole /3 that directly communicates with the free length part 2 is drilled in the ground with a downward slope. This is to drain the groundwater in the ground.

As mentioned above, compared to conventional construction methods, the present invention is expected to reduce costs by easily draining groundwater in the ground, stabilizing the ground, and improving the drainage effect.

[Brief explanation of drawings]

Figure 1 is an overall sectional view of the anchor construction method of this invention, and Figure 2 is a
The figure is a detailed view of the covering part between the perforated protective hollow tube and the tensile material.
FIG. 3 is a detailed diagram of the installation state of the drain pipe, and FIG. μ is a detailed diagram of another drainage method. /: Anchoring part 2: Free length part 3: Anchor head t: Insertion hole 5: Tension hole 2: Filler 7 2 hole protection hollow tube: 'Drain pipe 9: Fixing plate 10: Nut//Ground /2 Water supply hole /3 Drainage hole

Claims (1)

[Claims] (1) Insert the tensile material into the insertion hole drilled to a predetermined depth in the ground, fill the anchoring part at the tip of the tensile material with the filler material, and protect the hollow tube with holes in the free and branch parts of the middle part. After inserting the anchor, the nut is pulled and fixed to the ground through a fixing plate having a drain pipe communicating with the inside of the perforated protective hollow pipe at the anchor head (2). 2. An anchor having a water draining effect characterized by drilling a drainage hole in the ground that directly communicates with the free length of the insertion hole according to claim 1.