JP2000136700A - Rock bolt method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rock bolt method wherewith an excellent function can be developed for reinforcement of the ground while the amount of use is decreased for grout and at the same time an effective means for disposal of wastes can be provided. SOLUTION: A sheath member 12 is inserted into a drilled hole 11 formed at the ground 10 at an inclined land and after solid wastes 13 and inner grout materials 14 are thrown in and injected into the sheath member 12, the lower end 16b of a rock bolt anchoring member 16 inserted through an opening of the drilled hole 11 is united with the sheath member 12 with a rock bolt fixing member 21 with outer grout materials 15 injected into a space between the sheath member 12 and the drilled hole 11. Furthermore, a bearing plate 27 equipped with a slide sheath is mounted on the head 16a of the rock bolt anchoring member 16 exposed beyond a through hole 18 of a concrete structural body 17 formed on the surface of the ground 10, and tightened with a nut 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforced earth method which is carried out on a slope or a slope to prevent ground collapse.

[0002]

2. Description of the Related Art Conventionally, as a reinforced earth method for preventing ground collapse on slopes and slopes, a rock bolt material or an anchor material is inserted into an excavation hole formed in the ground to form a ground. A rock bolt construction method and a ground anchor construction method are known in which a reinforcing structure is formed by fixing the head of the rock bolt material or the anchor material to the ground surface while fixing the material. As such a reinforcing earth method, for example, a method of burying anchor bolts disclosed in Japanese Patent Application Laid-Open No. 56-101000,
No. 0200 discloses an anchor construction method and the like.

[0003] By performing such a construction method on a sloping land or the like where there is a risk of ground collapse, the ground is strengthened and ground collapse can be prevented.
Road construction and residential land development on sloping lands and the like can be performed, and effective use of land can be achieved.

[0004]

In the conventional rock bolt method or the ground anchor method, the tip of the lock bolt material or the anchor material inserted into the excavation hole is fixed to the ground through a grout material or the like. In this case, mortar, cement milk, curable synthetic resin, or the like is used as the grout material.

However, in order to securely fix a rock bolt material, an anchor material, and the like inserted into a drill hole to the ground,
It is necessary to inject a large amount of grout material into the gap between the rock bolt material or the like and the ground to firmly fix the two, thereby increasing the amount of grout material used.

On the other hand, with the recent development of industry and the revitalization of consumer life, industrial waste and non-burnable garbage are generated in large quantities. The reality is that they are bothering. Also,
Recently, it has been pointed out that toxic gas may be generated by combustion of synthetic resin or the like, and even inflammable substances cannot be easily incinerated.

Therefore, an object of the present invention is to provide a rock bolt method which can exert an excellent ground reinforcing function while reducing the amount of grout material used and is also effective as a waste disposal means. To provide.

[0008]

In order to solve the above-mentioned problems, a rock bolt method according to the present invention is characterized in that solid waste and grout material are put into a drilling hole formed in the ground and inserted into the drilling hole. The rock bolt material is fixed to the ground through solid waste and grout material. Here, the solid waste refers to solid waste excluding various types of waste generated in industrial activities or domestic life, excluding indefinite substances such as waste liquid, waste water and waste gas.

[0009] With this configuration, the solid waste introduced into the drilling hole acts as a rock bolt material in the grout material to increase the shear strength. The fixing member is firmly fixed to the ground and exhibits an excellent ground reinforcing function after construction.
In addition, by using solid waste, it is possible to relatively reduce the amount of grout material used, and it is also effective as waste treatment means.

[0010] The rock bolt method according to the present invention includes a step of inserting a sheath material into an excavation hole formed in the ground, a step of charging solid waste into the sheath material, and a step of inserting an inner solid material into the sheath material. A step of injecting a grout material, a step of injecting an outer grout material into a gap between the sheath material and the ground, and a step of inserting a lock bolt fixing member into a drilling hole and fixing the same to the sheath material. And In this case, the lock bolt fixing member fixed to the sheath material is fixed to the pressure receiving structure on the ground surface.

By taking such steps, the lock bolt fixing member inserted into the borehole is fixed to the ground via solid waste, inner grout material, sheath material and outer grout material. , The reinforcement function is further improved. In addition, since solid waste is fixed in the sheath material by solidification of the grout material, after construction, the eluted substances from the solid waste do not diffuse to the ground, which may cause environmental pollution. Absent.

It is to be noted that part of the above-described steps can be performed in advance at a factory or the like, and the remaining steps can be performed at a construction site. That is, in a factory or the like, after the solid waste is put into the sheath material, the inner grout material is injected and solidified, carried to the construction site, inserted into the drilling hole, and then the outer grout material is removed. It can be injected and fixed.

Further, in the rock bolt method of the present invention, solid wastes include glass waste such as glass pieces and glass bottles, juice cans, beer cans, confectionery cans, empty cans such as film patrone, synthetic resin waste, and waste batteries. Etc. can be used. Such solid waste is
It has good adhesion to the grout material and works effectively as a rock bolt material in the grout material, so that it exhibits an excellent ground reinforcement function after construction. Since these solid wastes are generated in large quantities in industrial activities or domestic life, they are also effective as waste disposal means.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view of an inclined ground reinforced by a rock bolt method according to an embodiment.

As shown in FIG. 1, on a slope reinforced by the rock bolt method of the present embodiment, a sheath material 12 is inserted into an excavation hole 11 formed in a ground 10 of the slope ground, and The solid waste 13 and the inner grout material 14 are charged and injected into the inside, and the outer grout material 15 is injected into the gap between the sheath material 12 and the excavation hole 11 so as to be in close contact with the ground 10. In addition, the drilling hole 11
The lower end 16b of the lock bolt fixing member 16 inserted from the opening of the above is integrated with the sheath material 12 by the lock bolt fixing member 21. Further, the solid waste 13 is injected into the gap between the lock bolt fixing member 16 and the sheath material 12, and the inner grout material 14 is injected.

On the other hand, a concrete structure 17 (or a steel structure) is formed on the surface of the ground 10 as a pressure receiving structure by on-site construction.
A pressure plate 27 with a slide sheath is mounted on the head 16 a of the lock bolt fixing member 16 exposed through the through hole 18 provided in the (or steel structure), and is fastened by a nut 20. In this case, in order to prevent rainwater or groundwater from flowing into the sheath material 12, a water-stopping material 19 is injected into a gap between the head 16a of the lock bolt fixing member 16 and the through hole 18.

By applying such a rock bolt method to the ground 10, the lock bolt fixing member 16 inserted into the excavation hole 11 becomes solid waste 13, the inner grout material 14, the sheath material 12, and the outer grout. Lumber 1
5, the head 16a of the lock bolt fixing member 16 is fixed to the concrete structure 17 (or a steel structure) by the support plate 27 with a slide sheath and the nut 20. An excellent reinforcing function for the ground 10 is generated, and the collapse of the ground 10 can be effectively prevented. It should be noted that the sheath material 12 is used for the concrete structure 1.
7 (or a steel structure), the slide sheath may not be used.

In this case, since the solid waste 13 put into the sheath material 12 acts as a rock bolt material in the inner grout material 14 to increase the shear strength, the rock bolt fixing member 16 is firmly attached to the ground 10. Fixed to
Exhibits excellent reinforcement after construction. In addition, the use of the solid waste 13 makes it possible to relatively reduce the amount of the inner grout 14 used, and is thus effective as a waste disposal means.

Further, the solid waste 13 is made of the sheath material 12.
Is fixed by solidification of the inner grout material 14 inside, so that the eluted substance from the solid waste 13 does not diffuse to the ground 10 after construction, and there is no possibility of causing environmental pollution. Further, by putting the solid waste 13 into the inside of the sheath material 12, the usage amount of the inner grout material 14 can be relatively reduced.

It is to be noted that a part of the above-described steps can be performed in advance at a factory or the like, and the remaining steps can be performed at a construction site. That is, in a factory or the like, the sheath material 12
After the solid waste 13 is put into the inside, an inner grouting material 14 is injected and solidified to prepare a product, which is carried to a construction site and inserted into the drilling hole 11, and then the outer grouting material 15 is removed. It can be injected and fixed.

Next, with reference to FIGS. 2 and 3, a method of applying the rock bolt method shown in FIG. 1 will be described. FIG. 2 is an explanatory view of a step of the lock bolt method shown in FIG. 1, and FIG. 3 is a front view of an inclined ground reinforced by the lock bolt method shown in FIG.

In the rock bolt method of the present embodiment, first, as shown in FIG. 2A, an excavation hole 11 is formed in the ground 10 using an excavator such as a boring machine.
The sheath material 12 is inserted into the borehole 11. Here, the sheath material 12 is a cylindrical body made of stainless steel, but a cylindrical body made of polyethylene can also be used.

Next, as shown in FIG. 2B, after the solid waste 13 is charged into the sheath material 12, the inner grout material 14 is injected. In this case, solid waste 1
As 3, waste glass materials, empty cans, waste synthetic resin, waste batteries, and the like can be used.
Mortar having a water cement ratio (W / C) of about 45% can be used.

Thereafter, as shown in FIG. 2C, an outer grout material 15 is formed in a gap between the sheath material 12 and the ground 10.
And the lower end 16 b of the lock bolt fixing member 16 inserted from the opening of the drill hole 11 is integrated with the sheath material 12 using the lock bolt fixing member 21. The solid waste 13 and the inner grout 14 are also injected into the gap between the lock bolt fixing member 16 and the sheath 12.
Furthermore, on the surface of the ground 10 near the opening of the excavation hole 11,
A concrete structure 17 (or a steel structure) having a through hole 18 is formed by on-site construction.

Then, as shown in FIG. 2D, after a waterproof material 19 is injected into a gap between the head 16a of the lock bolt fixing member 16 and the through hole 18, the lock bolt fixing exposed from the through hole 18 is formed. After attaching the supporting plate 27 with the slide sheath to the head 16a of the member 16 and screwing and tightening the nut 20, the head 1 of the lock bolt fixing member 16 is tightened.
6a, when the rust prevention treatment is applied to the support plate 27 with the slide sheath, the nut 20, and the like, the construction by the lock bolt method is completed. It should be noted that the sheath material 12 is used for the concrete structure 1.
The slide sheath may not be used when inserted into a 7 or steel structure.

Here, when the sloping land after the completion of the construction is viewed from the front, a state as shown in FIG. 3A is obtained. In addition, instead of the concrete structure 17 (or steel structure),
As shown in FIG. 3 (b), concrete blocks 22 each made independently using waste glass material or the like as an aggregate.
The head 16a of the lock bolt fixing member 16 can be fixed to the surface of the ground 10 by using. In addition, using a concrete block 28 having a truncated quadrangular pyramid shape as shown in FIG. 4A or a concrete block 29 having a substantially hemispherical shape as shown in FIG. The portion 16a and the surface of the ground 10 can be fixed.

By taking such steps, a reinforced soil structure as shown in FIG. 5 can be constructed on the entire slope. In this case, from the top of the slope to the bottom,
By constructing sequentially, safe construction can be performed while preventing collapse of the ground 10. FIG.
In the figure, 23 is an assumed collapse line before reinforcement, 24 is an assumed collapse line after reinforcement, and 25 is a pseudo retaining wall constructed by the construction of the rock bolt method.
Against the earth pressure or slipping earth pressure on the back surface of the slab, it is possible to exhibit the same collapse suppression effect as that of the gravity type retaining wall. The rock bolt method according to the present embodiment can be applied to the ground 10 as it is. For example, when there is the ground 31 indicated by a dashed line in the figure, the ground parts 31a, 31
It is also possible to cut while cutting b, 31c and 31d in this order.

Next, another embodiment will be described with reference to FIG. FIG. 6 is a longitudinal sectional view showing a lock bolt method according to another embodiment.

As shown in FIG. 6, in the rock bolt method according to the present embodiment, a sheath material 12 is inserted into an excavation hole 11 formed in a ground 10 on an inclined ground, and solid waste is placed inside the sheath material 12. , The inner grout material 14 is injected, and the sheath material 12
The outer grout material 15 is injected into the gap between the hole 11 and the excavation hole 11. The lower end 16 b of the lock bolt fixing member 16 inserted from the opening of the excavation hole 11 is integrated with the sheath material 12 by the lock bolt fixing member 21. Further, an empty can 30 is placed above the lock bolt fixing member 21. In this case, solid waste other than the empty can 30 may be charged.

On the other hand, a concrete structure 17 is formed on the surface of the ground 10, and the head 16 a of the lock bolt fixing member 16 exposed through the through hole 18 provided in the concrete structure 17 has a supporting plate with a slide sheath. 27 and a nut 20 screwed to the head 16a.
Is fixed by tightening. in this case,
Since the water blocking material 19 is injected into the gap between the through hole 18 of the concrete structure 17 and the lock bolt fixing member 16, rainwater and groundwater do not flow. When the sheath member 12 is inserted into the concrete structure 17 or the steel structure, the slide sheath may not be used.

In the case of the present embodiment, except that a glass bottle 26 and an empty can 30 are used as solid waste to be put into the sheath material 12, the method is the same as the lock bolt method shown in FIG. In FIG. 6, portions denoted by the same reference numerals as those in FIG. 1 have the same structure and function as the lock bolt method shown in FIG.

As described above, in the rock bolt method according to the present embodiment, since the glass bottle 26 and the empty can 30 are used as the solid waste, the effect of relatively reducing the amount of the inner grout material 14 used is obtained. It is better at higher points. In addition, the glass bottle 26 and the empty can 30
Since there is no risk of deterioration or elution after construction and good adhesion to the inner grout material 14, a strong fixed state is obtained, and an excellent reinforcing effect on the ground 10 is exhibited. In addition, as solid waste, the glass bottle 26,
In addition to the empty can 30, waste synthetic resin such as waste dry batteries and waste tires can be used. In this case, it is desirable to put the same kind of solid waste into the same sheath.

[0033]

According to the present invention, the following effects can be obtained.

(1) Solid waste and grout material are put into the excavation hole formed in the ground, and the rock bolt material inserted into the excavation hole is fixed to the ground through the solid waste and grout. Accordingly, the solid waste acts as an aggregate in the grout material to increase the shear strength, so that the rock bolt material is firmly fixed to the ground, and exhibits an excellent ground reinforcing function after construction. In addition, by using solid waste, it is possible to relatively reduce the amount of grout material used, and it is also effective as waste treatment means.

(2) a step of inserting a sheath material into an excavation hole formed in the ground, a step of charging solid waste into the sheath material, and a step of injecting an inner grout material into the sheath material. By including a step of injecting the outer grout material into the gap between the sheath material and the ground, and a step of inserting the rock bolt material into the drilling hole and fixing it to the sheath material, the rock bolt material is a solid waste, Since it is firmly fixed to the ground through the inner grout material, the sheath material and the outer grout material, the reinforcing function is further improved. Further, since the solid waste is fixed in the sheath material by solidification of the grout material, there is no danger that substances eluted from the solid waste are diffused to the ground, and there is no possibility of causing environmental pollution.

(3) As solid waste, glass waste material,
The use of empty cans, synthetic resin waste materials, waste dry batteries, etc. improves the adhesion to the grout material and effectively acts as an aggregate in the grout material, thus exhibiting an excellent ground reinforcement function after construction. Since these solid wastes are generated in large quantities in industrial activities or home life, they are also effective as waste disposal means.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an inclined ground reinforced by a rock bolt method according to an embodiment.

FIG. 2 is a process explanatory view of the lock bolt method shown in FIG.

FIG. 3 is a front view of a sloping ground reinforced by the rock bolt method shown in FIG. 1;

FIG. 4 is a front view of a sloping ground reinforced by the rock bolt method shown in FIG.

FIG. 5 is a longitudinal sectional view of the entire sloped land reinforced by the rock bolt method shown in FIG.

FIG. 6 is a longitudinal sectional view showing a lock bolt method according to another embodiment.

[Explanation of symbols]

 10, 31, 31a, 31b, 31c, 31d Ground 11 Drilling hole 12 Sheath material 13 Solid waste 14 Inner grout material 15 Outer grout material 16 Lock bolt fixing member 16a Head of lock bolt material 16b Lower end of lock bolt material Part 17 Concrete structure 18 Through hole 19 Water blocking material 20 Nut 21 Lock bolt fixing member 22, 28, 29 Concrete block 23 Assumed collapse line before reinforcement 24 Assumed collapse line after reinforcement 25 Pseudo retaining wall 26 Glass bottle 27 With slide sheath Support plate 30 Empty can

Claims (3)

[Claims] 1. A solid waste and a grout material are put into a drill hole formed in a ground, and a rock bolt material inserted into the drill hole is ground through the solid waste and the grout. Lock bolt method characterized by being fixed to 2. A step of inserting a sheath material into an excavation hole formed in the ground, a step of charging solid waste into the sheath material, and a step of injecting an inner grout material into the sheath material. A step of injecting an outer grout material into a gap between the sheath material and the ground, and a step of inserting a lock bolt material into the digging hole and fixing the rock bolt material to the sheath material. Construction method. 3. The rock bolt method according to claim 1, wherein the solid waste includes at least one of glass waste material, empty can, synthetic resin waste material and waste dry battery.