JP2002276293A - Confirming method of tunnel back-filing grouting material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and surely confirm a backfill condition at a low cost. SOLUTION: When a tunnel lining layer 10 is formed, an inspection hole 20 is bored through the lining layer 10, and it is examined whether there is a hollow part 12 on the back face side of the tunnel lining layer 10 or not. If existence of the harmful hollow part 12 is detected on the back side of the lining layer 10, a back-filling grouting material 14 is injected and charged into the hollow part 12. Before the grouting material 14 is injected and charged, a transparent cylinder 22 is installed. After installation of the transparent cylinder 22 is finished, the back-filing grouting material 14 is injected and charged into the hollow part 12. When the back-filling grouting material 14 is cured with the elapse of time, the charging condition can be checked visually through the transparent cylindrical body 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for confirming the filling of a tunnel backfill material.

[0002]

2. Description of the Related Art In tunnel construction, a cavity may be formed on the back side of a lining layer, and if left as it is, it may cause collapse or the like. Therefore, in general, after forming a tunnel lining layer, an inspection hole is formed in the lining layer to investigate a cavity existing on the back side of the lining layer.

[0003] When a cavity is confirmed by such a survey, the cavity is filled with a curable backfill material such as mortar to fill the cavity.

[0004] In filling the backfilling filling material into such a cavity, a method of confirming the outflow of the filling material from an adjacent filling hole during the construction, an increase in the filling pressure of the filling material to be poured (generally, a pressure of 0. (Referred to as 15 to 0.2 MPa), the filling state of the injection material was confirmed, and when these were confirmed, the injection was stopped and used as a reference for the completion of the filling.

[0005] In addition, there is a method of confirming the filling by measuring a filling sensor or a thermocouple. further,
As a direct final confirmation method after the injection hardening of the backfill injection material, check boring is performed on an arbitrary cross section to confirm the integrity between the injection material and the ground.

[0006] However, such a conventional method of confirming the filling of the backfilling injection material has the following technical problems.

[0007]

That is, in the above-described method of confirming filling during construction, since it is not directly confirmed whether or not the injected material has reached the ground, the method is lacking in reliability or reliability. In addition, the confirmation method by measurement has a problem that it is difficult to secure a place where the measurement device is installed, and the measurement cost is high.

[0008] Further, although the check method by check boring has certainty, it is not easy to use because of its workability and economy.
There is a problem that the number of sampling points is limited, and the range of filling confirmation of the injection material is narrow.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a tunnel backfill that is simple and inexpensive and that can surely check the filling state. An object of the present invention is to provide a method for confirming filling of an injection material.

[0010]

In order to achieve the above-mentioned object, the present invention provides a method for manufacturing a semiconductor device, comprising the steps of: when a hollow portion is found on the back side of a tunnel lining layer; At the time of filling, in the method of checking the filling state of the backfilling injection material, when the presence of the cavity is confirmed, the cavity portion side from a through hole such as an investigation hole formed through the tunnel lining layer. Is installed, a transparent cylindrical body whose tip reaches the ground is installed, and thereafter, the backfilling filling material is filled in the hollow portion, and the filling state of the filled backfilling filling material is The observation was performed by visual observation through the transparent cylinder.

According to the method for confirming the filling of the tunnel backfill filling material configured as described above, a through hole such as an inspection hole used for investigating the cavity is used to extend from the through hole to the cavity side. A transparent tubular body whose tip reaches the ground is installed, and then the backfill filler is filled in the cavity, and the filling state of the filled backfill filler is visually observed through the transparent tubular body. Therefore, it is possible to reliably check whether or not the injected material has reached the ground by relatively simple means.

When a transparent tape or a transparent film which can be broken is attached to the tip of the transparent cylinder and closed, and after the filling state is confirmed, it is confirmed that the back filling material is not filled, the transparent tape or the transparent tape or The transparent film can be broken to perform the final filling of the backfill filler.

The visual observation can be performed via a fiber scope or a ccd camera installed in the transparent cylinder.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 to FIG. 3 show one embodiment of a method for confirming the filling of a tunnel backfill filling material according to the present invention.

The method of confirming the filling of the tunnel backfilling filling material shown in FIG.
When the hollow portion 12 is confirmed on the back side of the
This is performed in order to confirm the filling state of the backfilling injecting material 14 when the backfilling injecting material 14 is filled.

When constructing a mountain tunnel, as shown in FIG. 1, a ground 16 is excavated, and a tunnel lining layer 10 is formed inside the excavated ground excavation surface 18. In addition,
The cavities 12 usually rarely occur, but are exaggerated in FIG. 1 for easy understanding.

The tunnel lining layer 10 is formed to a predetermined thickness by, for example, a spraying concrete method, a concrete casting method using a formwork, or a method using precast concrete.

When investigating the hollow portion 12 of the ground 16 behind the tunnel lining layer 10, as shown in FIG. 1, an inspection hole 20 is formed through the tunnel lining layer 10, and the rear surface of the tunnel lining layer 10 is formed. It is investigated whether a cavity 12 is present on the side.

The inspection holes 20 are provided, for example, at a pitch of 10 m along the tunnel axis direction. The cavity 1
The survey 2 is performed not only when the survey hole 20 is provided, but also by, for example, hitting the lining layer 10 with a hammer or the like and listening to the sound generated at that time.
In the case where the cavity 12 is confirmed without providing the inspection hole 20, providing a through hole corresponding to the inspection hole 20 does not hinder the implementation of the present invention.

When the presence of the harmful cavity 12 on the back side of the tunnel lining layer 10 is confirmed by the investigation through the investigation hole 20, the cavity 12 is filled with the backfill filling material 14. However, in the case of the present embodiment, as shown in FIG. 2, a transparent cylindrical body 22 is installed before the backfill injection material 14 is injected and filled.

The transparent cylinder 22 has an outer diameter substantially equal to the diameter of the inspection hole 20 and has a hollow cylindrical shape with both ends opened. For example, the transparent cylinder 22 is made of transparent plastic, It is in a state where it is possible to see through.

A transparent tape 24 is attached to the front end of the transparent cylindrical body 22, and the front end opening is closed so that it can be broken. The means for closing the opening at the tip of the transparent cylindrical body 22 so as to be rupturable may be, for example, a thin transparent film, or a transparent and thin plastic film. May be formed integrally with the tip of the cylindrical body 22.

The transparent cylindrical body 22 is inserted into the inspection hole 20 and extends toward the hollow portion 12, and reaches the ground 16 so that a part of its tip comes into contact with the ground excavation surface 18. It is set up to do.

In order to install the transparent cylindrical body 22 in such a state, before installing the cylindrical body 22, the distance from the survey hole 20 to the ground excavation surface 18 above it is measured in advance. 22 is set to a length considering the distance.

When the installation of the transparent cylindrical body 22 is completed, as shown in FIG. 3, the backfilling filling material 14 is injected and filled into the hollow portion 12.

The backfill implant 14 is, for example, a curable material such as mortar.
Injection filling is performed through other holes adjacent to the inspection hole 20 and injection holes penetrating the tunnel lining layer 10 like the inspection holes.

When the backfill implant 14 is injected into the cavity 12, the implant 14 fills the cavity 12 while flowing. At this time, the back filling material 14 flows and intervenes also on the upper side of the transparent tape 24 attached to the tip of the transparent cylindrical body 22.

However, the front end side of the transparent cylindrical body 22 is considerably separated from the injection point of the backfill injection material 14 and the interval l between the front end and the ground excavation surface 18 is small. Even if the backfill injection material 14 is interposed on the upper side, the pressure hardly acts, so that the transparent tape 24 is not broken by this.

Therefore, the backfill filling material 14 filled in the hollow portion 12 is prevented from leaking outside through the transparent cylindrical body 22.

As described above, the backfill injection material 14 is injected and filled into the hollow portion 12, and when it is cured over time, the filled state is confirmed by visual observation through the transparent cylinder 22. In addition, such confirmation of the filling state can be performed not only after the injection material 14 is cured, but also, for example, can be visually observed during the injection of the backfill injection material 14.

For visual observation in this case, for example, a light for illumination can be inserted into the transparent cylindrical body 22 and directly observed visually. However, a fiberscope or a ccd camera is inserted and installed together with the illumination. When the image information captured by the above is displayed on the monitor and observed and observed, clearer information can be obtained, and the filling state can be grasped more accurately.

According to the method of confirming the filling of the tunnel backfill filling material 14 configured as described above, the inspection hole 20 used for the inspection of the cavity 12 is used to extend from the investigation hole 20 to the cavity 12 side. Then, a transparent tubular body 22 whose tip reaches the ground is provided, and thereafter, the backfilling filling material 14 is filled in the hollow portion 12, and the filling state of the filled backfilling filling material 14 is set to be transparent. Since the visual observation is performed through the cylindrical body 22, it is possible to reliably confirm whether the injected material 14 has reached the ground 16 economically by relatively simple means.

When the filling state is confirmed, the injected material 14 is settled and spilled due to hardening shrinkage and bleeding of the injected material 14 and spring water from the ground 16, so that the injected material 14 is backfilled with the ground excavated surface 18. If it is found that a cavity is formed between the transparent material 24 and the filling material 14, the filling material 14 can be injected from the rear end side of the transparent cylindrical body 22 after the transparent tape 24 is broken, and the final filling can be performed.

By adopting such a reliable construction management method, it is possible to increase the interval between the injection holes formed in the lining layer 10 for injecting the backfill injection material 14, thereby improving the quality. Not only that, it can also streamline construction.

In addition, as shown in FIG. 3, the transparent hole 22 in which the filling state of the backfill injection material 14 has been confirmed
The cap 26 is attached to the opening end of the “0”, and a screw plug 28 is attached to the cap 26 to close the cap.

[0036]

As described above in detail, according to the method for confirming the filling of the tunnel backfill filling material according to the present invention,
By using the inspection hole, it is possible to easily and inexpensively and surely check the filling state.

[Brief description of the drawings]

FIG. 1 is an explanatory sectional view of an initial step of a method for confirming the filling of a tunnel backfill material according to the present invention.

FIG. 2 is an explanatory sectional view of a step performed subsequent to FIG. 1;

FIG. 3 is an explanatory cross-sectional view of a step performed subsequent to FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Tunnel lining layer 12 Cavity part 14 Backfilling injection material 16 Ground mountain 18 Ground excavation surface 20 Inspection hole 22 Transparent cylinder 24 Transparent tape

Claims (3)

[Claims] 1. A method of confirming the filling state of the backfilling filling material when the cavity portion is filled with a curable backfilling filling material when a cavity portion is confirmed on the back side of the tunnel lining layer. In the above, when the presence of the hollow portion is confirmed, it is extended to the hollow portion side from a through hole such as an inspection hole formed through the tunnel lining layer, and a tip reaches a ground level and is transparent. A tunnel is provided, in which a transparent cylinder is installed, and thereafter, the cavity is filled with the backfilling filler, and the filled state of the backfilling filler is visually observed through the transparent cylinder. How to check the filling of backfill injection material. 2. A transparent tape or a transparent film, which can be broken, is attached to the tip of the transparent cylindrical body, and the transparent cylinder is closed. The method for confirming the filling of the tunnel backfilling material according to claim 1, wherein a final filling of the backfilling material is performed by breaking a tape or a transparent film. 3. The method according to claim 1, wherein the visual observation is performed via a fiberscope or a ccd camera installed in the transparent cylinder.