JPH0579768B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a construction method for an anchor body with excellent corrosion resistance for anchoring a structure to the ground.

[Conventional technology]

Conventionally, as this type of anchor body, for example, the one shown in Japanese Patent Publication No. 14207/1983 or shown in FIG. 5 is known.

In the figure, reference numeral 1 denotes an anchor structure, which includes a plurality of tensile members 2, an external injection hose 3 disposed along the tensile members 2, and whose end passes through water-stop packing or a cap 5, and this external injection hose. An internal injection hose 4 is arranged in parallel with the hose 3 and opens near the water stop packing or cap 5, and is arranged so as to surround the plurality of tension members 2 and injection hoses 3 and 4, and has a water stop end. It consists of a wavy synthetic resin tube body 6 attached to a packing or cap 5.
This anchor structure 1 is integrated with spacers 7 interposed at appropriate intervals.

The anchor structure 1 thus formed is inserted into a hole 8 drilled by an arbitrary device with the waterproof packing or cap 5 placed first. and,
First, the hardening material 9 is injected from the external injection hose 3,
The space between the anchor structure 1 and the hole 8 is filled, and then the hardening material 9 is injected into the anchor structure 1 from the internal injection hose 4, and the anchor structure 1 is filled.

After the hardening material 9 hardens, it functions as an anchor body.

In this anchor body, the tensile member 2 is covered with a synthetic resin sheath 6 with excellent corrosion resistance, so even after long-term use, the tensile member 2 is protected against water, etc. that enters through the ground. There is no risk of corrosion due to twisting.

[Problem that the invention seeks to solve]

However, in the above construction method, since the inside and outside of the anchor structure 1 are separated by the waterproof packing or the cap 5 and the sheath 6, the hoses for injecting the hardening material 9 are connected to the outside 3 and the inside 4, respectively. Separately required. Therefore, there is a problem that the anchor structure 1 becomes larger and the hole diameter becomes larger. Therefore,
If the size is made smaller, the number of tensile members 2 must be reduced, and the yield strength will be reduced. As a result, the number of anchors increases, which is uneconomical.

[Purpose of the invention]

The present invention has been made to solve these conventional problems, and its purpose is to provide a construction method for an anchor body having a predetermined proof strength without increasing the size of the anchor structure.

[Means for solving problems]

The method for constructing an anchor body according to the present invention includes arranging an injection hose along a plurality of tension members, providing a water stop member at the tip of the injection hose, and attaching a sheath surrounding the tension member to the water stop member. After inserting the anchor structure made of In the construction method of solidifying anchor bodies,
A plurality of injection hoses are provided, each of which opens at a portion protruding from the water-stopping member and at a portion adjacent to the water-stopping member within the sheath, and a pressure-operated valve body is provided at the discharge port that opens inside the sheath. First, the hardening material is injected from the discharge port of the injection hose that opens outside the water-stopping member, and the hardening material is loaded between the outside of the sheath and the hole wall, and then it is injected from outside the hole. A blocking member is sent through the hose to close the outlet of the injection hose that opens outside the water stopper, and the pressure inside the injection hose is increased to push and expand the operating valve body that covers the outlet of the injection hose, causing the inside of the sheath to be closed. The hardening material is discharged from the discharge port opened at the sheath, and the hardening material is loaded inside the sheath.

[Action of the invention]

In the present invention, since only one injection hose is required, the injection hose can be attached without increasing the size of the anchor structure. or,
Hardening material can be easily injected. Moreover, since the discharge port provided in the injection hose can be activated by the pressure difference between the inside and outside, switching can be performed without using any special equipment.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an anchor body 1 constructed according to the present invention.
0, the anchor structure 11 is
A plurality of tensile members 12, an injection hose 13 arranged in parallel to the center of the tensile members 12, a cylindrical synthetic resin sheath 14 surrounding the injection hoses 13 and the tensile members 12, and the sheath 14. Injection hose 13
and a water-stop cap 15 that penetrates the tip of the cap.

The injection hose 13 is composed of a synthetic resin hose 131 and an injection material discharge member 133 attached to the tip of the hose 131 via a connector 132, as shown in FIG.

The injection material discharging member 133 has a bottomed cylinder 134 provided with a plurality of holes 135 and 136. The hole 135 is provided at a portion protruding from the water stop cap 15, and the hole 136 is provided so as to be located inside the sheath 14 from the water stop cap 15. A pressure-operated valve body 137, such as a rubber sleeve, is attached to the hole 136. This pressure-operated valve body 137 is set not to open when the hardening material 16 is discharged from the hole 135, but to open when the hole 135 is closed and the internal pressure of the injection hose 13 increases.

The anchor structure 11 constructed in this way is inserted into a hole 17 drilled by an arbitrary device with the water stop cap 15 at the beginning. At this time, a spacer may be inserted if necessary. After the anchor structure 11 is placed at a predetermined position, a hardening material (for example, cement paste) 16 is pumped into the injection hose 13 using a pump or the like. Hardening material 16
As shown in FIG. 3, is discharged from the hole 135 at the tip to the outside of the anchor structure 11 and filled between the hole 17 and the anchor structure 11.

During this time, the area to be filled is expanded as the hardening material 16 is fed under pressure. When the operator senses that the curing material 16 has spread to the fixing part 20 constituted by the anchor structure 11 and the hole 17, a closing member such as a ball made of rubber or synthetic resin, asphalt, or elastomer, etc. 1
9 into the injection hose 13 and pumped, and the hole 135 is closed as shown in FIG. Along with this, the pressure inside the injection hose 13 increases and the hole 136
The pressure-operated valve body 137 that had been blocking the valve is pushed open. For this reason, the hardening material 16 inside the injection hose 13
is discharged into the anchor structure 11. Then, when the operator senses that the hardening material 16 has spread over a predetermined range, the supply of the hardening material 16 is stopped.

After waiting for the hardening material 16 to harden, the tensile material 12 is fixed to a pedestal or the like with a desired tension applied thereto to function as the anchor body 10.

As described above, according to this embodiment, the anchor structure 11 only needs to be provided with one injection hose 13, so that it does not become as large as the conventional anchor structure 1 (see FIG. 7). Further, since only one injection hose 13 is required, a sufficient installation space can be secured, the number of tensile members 12 can be increased, and the strength of the anchor body 10 can be increased. Furthermore, when injecting the hardening material 16, since the hole 136 inside the sheath 14 is closed by the pressure working valve body 137, there is no possibility that the hardening material 16 will inadvertently infiltrate into the sheath 14, and injection into and out of the sheath 14 will be prevented. Work can be done reliably. When the injection of the hardening material 16 through the hole 136 is completed, it is only necessary to send the corrosion-resistant closing member 18 through the injection hose 13, so the hole 136 can be easily closed without requiring any complicated mechanism or means. . However, when the hole 136 is blocked, the pressure-operated valve body 137 is automatically expanded by the pressure increase in the injection hose 13, so the operator has to check whether the hole 136 has been completely blocked. This makes it easy to confirm whether the system is in use, and eliminates the need for conventional operations such as switching injection hoses.

In addition, in the present invention, the sheath 14 is the tensile material 12.
Any material may be used as long as it maintains the corrosion resistance, and although it is not particularly limited, it is preferable that the inner and outer surfaces are corrugated to enlarge the area as shown in the examples. Also, the closing member 18
As long as the hole 135 can be reliably closed, there is no need to limit it to those disclosed in the embodiments, and for example, a plated metal ball, a stainless steel ball, etc. may be used. Furthermore, although a rubber sleeve is preferable for the pressure-operated valve body, it is preferable to use a rubber sleeve, for example, with the hole 136 closed until the internal pressure rises after the hole 135 is closed, and then break or break when the internal pressure reaches a predetermined level. It may also be a valve body. Further, the means for drilling the hole 17 is arbitrary and is not particularly limited. Further, the hardening material 16 may be any material as long as it can be used in the anchor body 10. In addition, although the injection hose 13 is of a type in which the hose 131 and the injection material discharging member 134 are connected by the connector 132, it may be formed integrally with the hose. Further, the injection material discharging member 134 may be formed of any material as long as it has corrosion resistance.

〔Effect of the invention〕

As described above, according to the present invention, since the hardening material can be reliably injected into the inside and outside of the anchor structure using one injection hose, a strong anchor body can be created without changing the size, and the work Improves sex.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the main parts of an anchor body formed according to an embodiment of the present invention, FIG. 2 is a plan view of the anchor structure, and FIG. Fig. 4 is a cross-sectional view of the main part showing a state in which the hardening material is injected between the anchor structure and the hole wall, and Fig. 4 also shows the state in which the tip of the injection hose is closed and the hardening material is injected into the sheath. FIG. 5 is a cross-sectional view of the anchor body, FIG. 6 is a cross-sectional view of the conventional anchor body, and FIG. 7 is a plan view of the anchor structure. 10... Anchor body, 11... Anchor structure, 12... Tensile material, 13... Injection hose, 14
... Sheath, 15 ... Water-stop cap, 16 ... Cement paste, 17 ... Hole, 18 ... Closing member, 20 ... Fixing part.

Claims (1)

[Claims] 1. An anchor structure comprising an injection hose arranged along a plurality of tension members, a water stop member provided at the tip of the injection hose, and a sheath surrounding the tension members attached to the water stop member. is inserted into a hole drilled in the ground, and then a hardening material is injected from the injection hose to integrally solidify the space between the outside of the sheath and the hole wall and the inside of the sheath with the hardening material. In this construction method, discharge ports are provided that open at a portion protruding from the water stop member and at a portion near the water stop member inside the sheath, and a pressure-operated valve body is provided at the discharge port that opens inside the sheath. One injection hose is provided along the plurality of tensile members, and first, the hardening material is injected from the discharge port of the injection hose that opens outside the water stopper, and the hardening material is loaded between the outside of the sheath and the hole wall. After that, a closing member is sent from outside the hole through the injection hose to close the outlet of the injection hose that opens outside the water stopper, and the operating valve increases the pressure inside the injection hose to cover the outlet of the injection hose. A construction method for an anchor body, which comprises: expanding the anchor body, discharging a hardening material from a discharge port opened inside the sheath, and loading the hardening material into the sheath. 2. The method for constructing an anchor body according to claim 1, wherein the sheath is composed of a synthetic resin tube. 3. The method for constructing an anchor body according to claim 2, wherein the synthetic resin pipe has wavy inner and outer surfaces. 4. The method for constructing an anchor body according to claim 1, wherein the opening of the injection hose provided at the part protruding from the water stop member is one or more holes. 5. Claims characterized in that the opening of the injection hose provided at the part protruding from the water stop member is closed by a closing member sent together with the curing material from the injection side of the injection hose. The method for constructing an anchor body according to paragraph 1. 6 The closing member is a ball made of rubber or synthetic resin,
6. The method of constructing an anchor body according to claim 5, wherein the material is made of asphalt, elastomer, or the like that closes the opening of the injection hose and has corrosion resistance. 7. A patent characterized in that the opening of the injection hose provided in the vicinity of the water stop member inside the sheath is a hole, and is configured to open when the pressure exceeds a predetermined pressure using a pressure-operated valve body. A method for constructing an anchor body according to claim 1. 8. The method for constructing an anchor body according to claim 7, wherein the pressure-operated valve body is a rubber sleeve. 9. The injection hose is composed of a hose and a curing material discharging member having a bottomed cylindrical shape and having a portion protruding from the water stopper member and a discharge port opening at a portion near the water stopper member inside the sheath. The method for constructing an anchor body according to claim 1, characterized in that: