JP2834656B2 - Detecting method of filling state of filler in tunnel grouting - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tunnel grouting and, more particularly, to a method for detecting a filling state of a grouting filler in a tunnel grouting for detecting a filling state of the grouting filler.

[0002]

2. Description of the Related Art In a pressure headrace tunnel or the like, grouting is performed for the purpose of improving the ground around the tunnel and introducing prestress into lining concrete. In addition, in the long-end receiving method, which is an auxiliary method for tunnels, grouting is performed to fill the gap between the steel pipe and the ground, and to improve the support capacity and to improve the surrounding ground. .

[0003] When the grouting is performed,
Depending on the condition of the ground around the tunnel, etc., determine the compounding and injection amount of grouting filler such as cement milk, and
A predetermined filler is injected under pressure from the injection hole.

[0004]

In the above conventional example,
It is impossible to judge the reaching range and packing density of the injected filler, and there is a disadvantage that the construction quality cannot be confirmed. Therefore, there is a technical problem to be solved in order to be able to accurately grasp the injection range of the grouting filling material and to enable proper construction management, and the present invention solves the problem. The purpose is to do.

[0005]

DISCLOSURE OF THE INVENTION The present invention has been proposed to achieve the above-mentioned object, and is provided for tunnel grouting for improving the ground around a tunnel.
A is, the grouting provided construction within or near the survey hole thereof, by inserting the detection sensor into the investigation hole, for detecting the filling status by electrical resistance value of said detection sensor
In the tunnel grouting, the investigation hole is
Many are provided in or around the grouting work area.
And a plurality of detection sensors are inserted into the inspection holes, respectively.
At the same time, the partition between the sensors
Separate them separately to prevent spills
With grouting, the electric resistance of the detection sensor
It is an object of the present invention to provide a method for detecting a charged state in tunnel grouting, wherein the charged state is detected by a value .

[0006]

[Action] drilled grouting construction within or large number of investigations holes around them, the number of survey holes in each plurality of sensing Sen
Insert a sir . Thus, each of the plurality of detection sensors is
Each is isolated by a partitioning device in the investigation hole. Next
Then, the grouting provided in the grouting construction area
Grout each from a number of injection holes for filling
Grouting is performed by injecting a filling material. The injection hole
The more injected grouting filler is in each injection hole.
Penetrates into the surrounding ground from the wall, and
It flows into the cavity partitioned by the partitioning tool. here,
The filler is supplied to a detection sensor installed in the cavity.
Is detected and the filling status of the filler is recognized for each area
Will be done. Thus, a partitioning tool is used in the inspection hole.
The filler that has penetrated into each cavity parted by
The partition prevents the outflow into the tunnel. So
And accurately detected by the detection sensor in the cavity.
Will be. Also, after the filler is injected, the detection sensor
The state of the condensed state etc. can be grasped by the electric resistance value of the
Very accurately recognize the condition of the ground around the tunnel
Can be

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to FIGS. FIG. 1 and FIG. 2 show the execution of consolidation grouting for consolidating the ground on the ground 2 around the tunnel 1. As shown in FIG. 1, investigation holes 4, 4...
Are inserted into the inspection holes 4, 4,... And the partitioning tools 6, 6,.
Are connected to the detection sensors 5, 5,..., And the other ends of the leads 7, 7,.

Injecting holes 9, 9 for injecting grouting filler material are formed in the concrete lining 3 in the same manner as the inspection holes 4, 4,. As shown in FIGS. 1 and 2, the number of the injection holes 9, 9,... Is determined by the condition of the ground around the tunnel 1, and the inspection holes 4, 4,. An appropriate number is set at a position where the injection work range can be confirmed based on the quantity, interval, etc. In addition, the inspection hole 4 may be only the left and right ends in FIG. 1, and all the holes between them may be injection holes 9.

[0009] Then, as shown in FIG.
Is formed by the detection sensor 5, the partition 6 and the lead wire 7. The electrode T of the detection sensor 5 inserted into the inspection hole 4,
T is connected to a lead wire 7 and is vertically separated by partitioning tools 6 in the longitudinal direction of the inspection hole 4. The lead wire 7 penetrates through the center of the dividers 6, 6 and closes the inspection hole 4,
The lead wire 7 and the detection sensor 5 are connected to the inspection hole 4.
To prevent the grouting filler from flowing out from the bottom of the inspection hole 4.

When the measuring device 10 is used, grouting filler is injected from the injection holes 9, 9,... As shown in FIG. 9 penetrates into the surrounding ground 2 from the wall surface. Then, for example, from the injection hole 9a in FIG.
_The filler material that has permeated into ₁ reaches the inspection hole 4a, flows into the cavity formed by the partitioning tools 6a and 6b in the inspection hole 4a, and the filler material enters the pair of electrodes T and T of the detection sensor 5a. Touch T. Moreover, fillers having penetrated the natural ground 2 in the direction S ₂ after having reached the investigation hole 4b, a pair of electrodes T detection sensor 5b, contacting the T. As a result, the space around each of the detection sensor 5a and the detection sensor 5b is filled with the filler, and thus, the filling state of the filler filled around any detection sensor can be known for each area. Can be.

Further, each measuring device and the lead wire are maintained in a state of being buried in the filler. Therefore, it is possible to measure the electric resistance value of an arbitrary detection sensor after injecting the filler, and to grasp the condition such as the setting state of the filler based on the measured value. FIG. 4 and FIG. 5 show a prior-preceding construction method which is a tunnel auxiliary construction method of another embodiment. As shown in FIG. 4, the inspection hole 1 is located from the end face of the tunnel 12 at the ground 11.
3, 13, ... are bored in parallel with the tunnel 12. And, as shown in FIG. 5, the inspection holes 13, 13...
Set an appropriate number on the outer circumference of.

Then, as shown in FIG. 4, the detection sensors 14, 13.
14 and the partitioning tools 15, 15,.
6 and 16 are wired to form a measuring device 17, and the other end of the lead wires 16 is connected to the measuring device 1 in the tunnel 12.
Connect to 8. The injection holes 19 into which grouting filler is injected are formed obliquely upward while shifting the holes from the upper part of the entrance of the tunnel 12 to the inner part of the tunnel 12. When the measuring device 17 is used, as in the case shown in FIG. 1 and FIG. It is possible to judge the injection state and the setting state of the material.

The present invention can be variously modified without departing from the spirit of the present invention, and it goes without saying that the present invention extends to the modified ones.

[0014]

According to the present invention, as described in detail in the above embodiment, a large number of surveys are made within or around the grouting work area.
Drill holes, and a plurality of detection sensors are respectively provided in the large number of inspection holes.
The insert. Thus, the plurality of detection sensors have respective adjustments.
In the borehole, each part is isolated by a partition. Next
Then, the grouting provided in the grouting construction area is filled.
Groutin each through a number of injection holes for filling
Grouting is performed by injecting a filler material for grinding. This injection hole
Filled grouting filler is applied to the wall of each injection hole.
Surface, and penetrates the surrounding ground,
It flows into the cavity partitioned by the cutting tool. Where
The filler is detected by a detection sensor installed in the cavity.
And the filling status of the filler is recognized for each area.
Will be. Thus, a partitioning tool is used in the inspection hole.
The filler that has penetrated into each of the partitioned cavities is
The outflow into the tunnel is prevented by the divider. Soshi
And is accurately detected by the detection sensor in the cavity.
Will be. In addition, after the filling material is injected, the detection sensor may be used.
The state of the condensation state etc. can be grasped by the electric resistance value of
It is very accurate to recognize the situation of the ground around the tunnel
be able to. In this way, the present invention has various effects, such as proper grouting construction management, which can contribute to improvement of construction quality.

Further, even after the filling material is injected, by measuring the electric resistance value of an arbitrary detection sensor,
The present invention has various effects, such as being able to grasp the setting state of the filler and the like, enabling proper grouting construction management, and contributing to the improvement of construction quality.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention, and is a partially cutaway longitudinal side view thereof.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an enlarged vertical sectional view of a partly cut-out portion of the inspection hole shown in FIG. 1;

FIG. 4 is a partially cut-away longitudinal side view showing another embodiment of the present invention.

FIG. 5 is a sectional view taken along line BB of FIG. 4;

[Explanation of symbols]

 1,12 Tunnel 2,11 Ground 4,13 Inspection hole 5,14 Detection sensor 6,15 Partitioning tool 7,16 Lead wire 8,18 Measuring instrument 10,17 Measuring device

Claims (1)

(57) [Claims] 1. A tunnel grouting for improving the ground around a tunnel , wherein a survey hole is provided in or around the grouting construction area, and a detection sensor is inserted into the survey hole, and the detection is performed. Tunnel grout that detects the filling status based on the electrical resistance of the sensor
In the grooving, the inspection hole is within the range of the grouting
Or a number of them are provided around the
Number of detection sensors are inserted and the divider
Preventing the grouting material from flowing out between the plurality of sensors.
Separate and then grout, as before
The filling state is detected based on the electrical resistance of the detection sensor.
A method for detecting a filling state in tunnel grouting, characterized in that the method comprises: