JP3382873B2 - How to insert the tube - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of inserting and installing a pipe into an insertion target portion including a slope ground, a lining slope that covers a slope ground, and the like, and a pipe body used therefor.

[0002]

2. Description of the Related Art For example, in order to prevent an artificial slope formed by cutting the ground or embankment from collapsing due to wind and rain, blocks are installed side by side or mortar is sprayed on the slope. At the same time, a drainage pipe that penetrates the lining may be provided. In this case, an insertion hole that penetrates the lining by the drilling hole and extends into the back ground is provided, and after the drilling hole is pulled out from the insertion hole, the drain pipe is inserted into the insertion hole. It was

On the other hand, in recent years, a method for repairing an existing lining such as a slope has been proposed and put into practical use. The method of repairing the existing lining is, for example, the above-mentioned Japanese Patent Publication No. 5-22 by the present applicants.
As shown in No. 775, the cavity between the lining and the back ground is measured without destroying the existing lining, and then the existing lining is pierced with a drill to reach the inside of the ground. After drilling the anchor hole, pull out the drill and then insert the anchor material into this anchor hole, and through this anchor material, fill the voids between the lining and the back ground with hardening material. After that, the surface of the existing lining is newly lining. In this case, the anchor material used is a tubular body, and the anchor material was inserted into an insertion hole formed in advance by a drilling drill as in the drainage pipe described above.

[0004]

However, in these conventional examples, after the insertion hole is drilled by the drilling drill, the drilling drill is pulled out, and then the pipe body is inserted into the insertion hole. The hole and the insertion of the tubular body were troublesome twice.

Generally, since the back ground of an existing lining is often weathered and weakened due to permeation of rainwater, the drilled tube insertion hole is easily collapsed and the tube is smoothly inserted. There were some things I couldn't do.

[0006] Therefore, a main object of the present invention is to make it possible to easily and smoothly insert the tubular body, thereby improving the working efficiency.

[0007]

A method of inserting and installing a tubular body according to the present invention, which has solved the above-mentioned problems, is a method of installing a tubular body by inserting it into an insertion target site while leaving a proximal end portion thereof. It is equipped with a bit and is inserted into the tip and the insertion target site.
Through holes are provided in the base end side part excluding the base end part that does not enter.
Using a tube having the insert boring the target site, and self drilling inserting step of inserting into said tube body the proximal end portion leaving the insertion target in site by the drilling, the drilling insert Shi
Hardened material without removing the pipe
Discharge through the through hole at the tip of
At least in the gap between the outer surface of the storage tube and the wall of the insertion hole.
The first injection step of injecting into the tip side portion, and thereafter,
Before the hardening material injected in the first injection step is cured
The compressed air through the tube and through the proximal portion.
The step of blowing out only from the hole, and after that, the first
By hardening the hardening material injected in the injection process,
Fixing process of the tube to fix it to the insertion target part
After that, a hardening material is applied to the inside of the fixed tube.
And discharge through the through hole of the base end side portion,
Residue that was not injected with the hardening agent by the first injection step
Injected against parts and is characterized in that it comprises a second implantation step.

In this case, at the time of the boring, it is preferable that the boring air is blown out through the pipe body only from the through hole at the tip of the pipe body.

More specifically, at the time of drilling, an inner pipe for air supply is inserted into the pipe body, and the inner pipe for air supply is communicated only with the through hole at the tip of the pipe body. ,
It is proposed that the boring air is blown out only from the through hole at the tip of the tubular body through the air supply inner pipe.

<Operation> The main point of the present invention is to insert the pipe into the back ground while drilling the pipe with the drill bit at the tip of the pipe itself.
That is, the present invention is characterized by the self-drilling hole insertion in which the tubular body is inserted and the insertion hole is drilled at the same time.
Therefore, in the present invention, it is not necessary to drill a hole for inserting the tubular body in advance prior to inserting the tubular body, and the number of steps can be reduced accordingly. Further, as will be described later, even when the insertion hole is drilled in advance prior to inserting the self-drilling hole in the tubular body,
By inserting the pipe body along the prepared hole, the pipe body can be smoothly inserted regardless of the collapse of the prepared hole.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION <First Embodiment> First, the first embodiment of the present invention will be described in detail with reference to an example of application to the repairing method shown in Japanese Patent Publication No. 5-22775.

(Detection of Cavity and the Like) In the repairing method for the existing lining, it is first necessary to accurately specify in which part of the back surface of the existing lining the cavity is formed. Known means for identifying the cavity include, for example, a method of detecting using reflected waves of ultrasonic waves, a method of detecting and identifying a difference in thermal radiation between the cavity and another location with a thermal infrared camera, and a hammer. There is a method of hitting the lining and listening to the sound at that time and detecting it by experience. Since these are all known methods, the description is omitted here. Once the location of the cavity has been identified, a new anchor is provided at that location as described below.

(Drilling Insertion Step of Tubular Anchor Material (Corresponding to the Tubular Body in the Present Invention)) In the present invention, for example, a tip bit 1B as shown in FIG.
And a distal end face of the distal end bit 1B and a proximal end portion excluding the head portion 1H, the distal end ejection ports PH, ... And the proximal end side ejection ports BH1 to BH3 that communicate with the inside and outside are formed respectively. (Hereinafter, also simply referred to as an anchor material.) 1 is used as a new anchor. These discharge ports correspond to the through holes referred to in the present invention. The head portion 1H is a non-insertion portion, and its length is appropriately determined according to the insertion depth of the anchor material 1 and the like. Further, in the illustrated example, the base end side discharge ports BH1 to BH
3 are provided at intervals in the longitudinal direction, and any one of them is placed at the same depth direction position as the cavity between the back surface of the existing covering and the ground surface after the insertion as described below. It comes to wear.

As shown in FIG. 3, the tubular anchor material 1 is drilled through the existing lining C1 into the ground BG on the back surface thereof, and the tubular anchor material 1 is drilled by the drilling. Insert 1H into the natural ground BG. In the illustrated example, compressed air is blown out from the tip discharge port of the tip bit 1B, and is put on the blown air to remove the drilling dust from the gap S1 between the outer surface of the anchor material 1 and the anchor hole wall AH1.
So-called air drilling is used to discharge to the surface side. 2 shows a rock drill.

When performing such air drilling, if the drilling air is also blown out from the base end side discharge ports BH1 to BH3,
The blowing air acts so as to prevent the discharge of hole scraps,
The drilling chips are not discharged smoothly. Therefore, as shown in FIGS. 1 and 2, the inner tube 3 for air supply is inserted into the tubular anchor material 1 and the inner tube 3 for air supply is communicated only with the tip discharge holes PH ,. It is preferable to carry out the drilling while blowing the drilling air through only the tip discharge ports PH, ... Through the internal flow path 3F of the air supply inner pipe 3. In this example, the tip surface 3a of the air supply inner tube 3 is directly connected to the inlet surface 1b to the tip discharge port on the back surface of the tip bit 1B in a butted state, but as shown in FIG. Anchor material 1 is provided between the tip end outlet 3a of the pipe 3 and the tip end side outlet BH1 and the tip outlet 1b.
It is also possible to face the inside and indirectly connect the internal flow passage 3F of the air supply inner pipe 3 and the inlet 1b of the tip discharge port through a part of the anchor material internal flow passage 1F. In this case, at least the outer peripheral surface of the tip portion 30 of the inner tube 3 for supplying air is brought into close contact with the inner peripheral surface of the anchor material (in the illustrated example, the inner tube for supplying air 3
A seal ring R is wrapped around the outer peripheral surface of the tip portion 30 of (1) to tightly seal.

A connecting portion 4 for connecting the anchor material 1 and the rock drill 2 is attached to the base end portion of the air supply inner pipe 3 of the example shown in FIGS. 1 and 2. The connecting portion 4 has a nut portion 4a on the tip side and is screwed to the outside of a screw portion 1N formed on the peripheral surface of the base end portion of the anchor material 1. The state before the connection is shown in FIG. 1, and the state after the connection is shown in FIG.

When the drilling is completed, as shown in FIG. 5, the anchor material 1 is left without being pulled out, and the rock material 2 including the rock drill 2 and the connecting portion 4 is supplied from the anchor material 1 in the inserted state. The inner pipe 3 is removed (the removed state is shown in FIG. 5).

(First Injecting Step) Next, as shown in FIG. 6, the hardened material G1 is discharged into the tubular anchor material 1 and the tip side portion thereof without pulling out the tubular anchor material 1 into which the hole has been inserted. Discharge through the outlet PH, .... The discharge hardening material G1 is injected and filled into at least the tip side portion in the gap S1 between the tubular anchor material 1 and the anchor hole AH. Further, in a normal case, the injection hardening material penetrates into the back ground BG around the gap as shown by G11 in the figure.

Here, preferably, the first packer device 5 shown in FIGS. 7 to 9 or the second packer device 5 shown in FIG.
Perform injection using 0. First, the common points of both packer devices 5 and 50 will be described. All of them have the following configurations.

That is, the inner pipe 6 having the relatively large diameter expanded portion 6a at the tip side portion and the inner pipe portion rearward of the expanded diameter portion 6a are surrounded with a gap, and the longitudinal direction of the inner pipe 6 is increased. An outer tube 7 that can be slid back and forth along the direction,
The inner pipe 6 includes an injection pipe portion 8 including a tubular flexible packer member 5P surrounding an inner pipe portion between the front end surface of the outer pipe 7 and the rear end surface of the inner pipe expanded portion 6a. The one-touch operation means 9 for sliding back and forth with respect to the outer tube 7 is provided.

More specifically, the one-touch operation means 9 includes a handle 9H which swings around a shaft member attached to the outer tube 7, and an inner tube 6 which swings the inner tube 6 in accordance with the swing of the handle 9H. 7 and a link mechanism section 9R that slides back and forth with respect to 7, and the inner tube 6 is slid backward with respect to the outer tube 7 via the link mechanism section 9R by swinging the handle 9H. The flexible packer member 5P is sandwiched between the rear end surface of the expanded diameter portion 6a and the front end surface of the outer tube 7 so that the flexible packer member 5P can be compressed and laterally expanded and bulged.

Thus, the one-touch operation means 9 causes the inner pipe 6 to slide rearward with respect to the outer pipe 7 as shown in FIG. The flexible packer member 5P can be sandwiched between and compressed to expand laterally and expand.

As described above, there is no difference in the projecting mechanism of the packer member 5P between the two packer devices 5 and 50 (a different structure will be described later), and both of them can project the packer member 5P with one touch. Therefore, it has an advantage that the packer can be extended quickly and easily at each stage as compared with a known type device in which the packer is extended by tightening the nut. However, in the present invention, it is of course possible to use a conventional nut tightening type (see FIG. 5 of Japanese Patent Publication No. 5-22775 mentioned above).

At the time of injection, first, the packer device 5 is put in a state in which the flexible packer member 5P is not extended laterally.
The injection tube portion 8 of is inserted into the anchor material 1. At this time, as can be understood from FIG. 9 showing the projecting state of the packer member 5P, a position where the packer member 5P of the injection pipe portion 8 can close at least the distal end side proximal end side discharge port BH1 of the anchor material 1, that is, Preferably, the distal end side discharge port BH1 on the most distal end side
It is located closer to the tip side than. Thereafter, as shown in FIG. 9, the packer member 5P is laterally bulged by the one-touch operating means 9, and a gap S2 between the inner surface of the anchor material 1 and the outer surface of the injection pipe portion 8 is bulged by the bulged packer member 5P. It is in a closed state. Then, the hardened material G1 is supplied into the anchor material 1 through the inner pipe 6 of the packer device 5 while maintaining the closed state. The hardening material G1 passes through the anchor material 1 and is discharged only from the tip discharge ports PH ,.

In this way, the hardening material G1 can be discharged from only the tip discharge port PH, ... Through the anchor material 1 and injected into the gap S1 between the outer surface of the anchor material 1 and the inner surface AH1 of the anchor hole. .

By the way, in the injection of the hardening material only at the tip of the anchor material, the injected hardening material is injected into the base material side ejection port BH1 to BH1 of the anchor material 1 because the injection amount is too large or the injection speed is too fast. BH3 may be blocked. In this case, it is assumed that the smooth hardening material cannot be injected or cannot be injected in the second injection step described later. On the other hand, if the first packer device 5 is used, this blockage can be prevented.

That is, as shown in detail in FIG. 9, in the first packer device 5, unlike the second packer device 50, the compressed air outlets 7a, 7a are formed on the tip side of the outer tube 7, and the compressed air is discharged. The outer surface of the inner pipe 6 and the outer pipe 7 with respect to the air outlet
The one-touch operation means 9 is provided with the compressed air supply port 9a communicating with the inner surface through the gap S3, and at least the above-mentioned first
After the injection step and before the injection hardening material is cured, preferably immediately after the first injection, the compressed air is supplied to the compressed air supply port 9a.
And through the gap S3 from the compressed air outlets 7a, 7a to the gap S4 between the outer surface of the outer pipe 7 and the inner surface of the anchor material 1, and the blown compressed air is further discharged to the proximal end side discharge port BH1 of the anchor material 1.
~ BH3 to blow out the base end side discharge port BH1 ~
It is possible to blow away the uncured curing material that blocks BH3 and the gaps S4, S3, etc. communicating with it. Thus, the anchor material 1 is formed by the first injection hardening material G1.
It is possible to prevent the communication passage to the base end side discharge ports BH1 to BH3 from being blocked. In addition, in the process diagram of FIG.
Packer device 5 is shown. After the injection, the packer device 5 is pulled out from the anchor material.

(Waiting for hardening) On the other hand, the hardening of the hardening material G1 injected in the above-mentioned first injection step waits for the tip side portion of the tubular anchor material 1 to be fixed to the natural ground.

(Tension Fixing Step of Tubular Anchor Material) When the hardening material G1 by the first injection is hardened, the process shown in FIG.
As shown in FIG. 1, the anchor insertion hole 10a is provided for the head 1H of the tubular anchor material 1 protruding from the surface of the existing lining C1.
Through the bearing plate 10, and then the threaded portion 1N (not shown in FIG. 11) formed on the peripheral surface of the anchor head 1H is screwed with the tension nut 11. As a result, the tension nut 11 applies a reaction force to the natural ground BG via the anchor material 1, and the pressure bearing plate 10 is pressed against the surface of the existing covering C1. Thus, the tubular anchor material head 1H is fixed to the surface of the existing lining C1 and the ground anchor BG is fixed by the tension acting on the tubular anchor material 1 fixed across the existing lining C1. The mountain BG and the existing lining C1 can be firmly integrated.

Although the anchor material 1 is tensioned in this example, an excessive tension force causes the hollow portion H of the existing covering C1.
When acting on a portion having, it is assumed that the portion will be destroyed. Therefore, the tension nut 11 is not tightened too much, and the anchor material head 1H is simply attached to the existing structure C1.
It may be in contact with the surface.

(New lining process) Next, as shown in FIG. 12, the surface of the existing lining C1 is newly laid to construct a new lining C2. In the new lining, it is preferable to adopt a spraying method using mortar as shown in the figure in order to fill up the protruding protrusion 1H of the anchor material. Further, particularly in the case of spraying, a cap 12 (preferably made of rubber) is fitted in the opening 1C of the proximal end surface of the tubular anchor material 1 for the second injection described below, and the base of the cap 12 is It is preferable to perform new spraying so that the ends are exposed. However, lining with another concrete block or the like may be performed.

(Second Injecting Step) When the new lining is completed, as shown in FIG. 13, the hardening material is applied to the inside of the tubular anchor material 1 which is tension-fixed and to the base end side portion of the anchor material 1. Through the outlets BH1 to BH3, the cavity H between the back surface of the existing covering C1 and the ground surface BG is injected and filled.

In the illustrated example, the cap 12 is removed from the front side of the new lining C2, and the injection is made from the front side of the new lining C2 to communicate with the base end face opening 1C of the anchor material 1 buried therein. The hole 13 is formed. After that, using the above-mentioned second packer device 50 (of course, the first packer device 5 may be used), the injection pipe portion 8 is inserted into the injection hole 13 of the new lining C2, and The packer member 5P is extended to close the gap at the mouth of the injection hole 13, and then the hardening material is injected.

At this time, any one of the base end side discharge ports BH1 to BH3 of the plurality of anchor materials 1 (BH3 in the illustrated example).
However, since it comes to a position in the same depth direction as the hollow portion H between the back surface of the existing lining C1 and the surface of the natural ground BG, mainly from the base end side discharge port BH3 to the hollow portion H, and In the gap S1 between the outer surface of the anchor material 1 and the inner surface AH1 of the anchor hole from the other base end side discharge ports BH1 ,.
Injecting and filling the remaining portion not injected by the injection. In addition, at this time, in a normal case, the injection-hardening material also penetrates into the clearance S1 and the back ground BG around the cavity H as indicated by G22 in the drawing.

(Post-treatment) If necessary, the residual hole 13 formed by the cap 12 on the surface of the new lining C2 used in the second injection is filled with mortar M to form a new lining. Iron the C2 surface so that it has a flat surface with no holes.

<Second Embodiment> Next, FIG. 15 shows an example of insertion and installation of the drainage pipe. In order to prevent the artificial slope formed by cutting off the ground or embankment from collapsing due to wind and rain, blocks are installed in parallel or mortar is sprayed on the slope C3
And a plurality of drainage pipes 100, ... Penetrating the lining C3, the height direction positions are made different. This drain pipe 100 has a through hole 100H, ...
It has the same structure as the above-mentioned anchor material except that the number of is different. Reference numeral 100B indicates a tip bit, which has a tip through hole (not shown). When such drainage pipes 100 are provided, for example, slope lining is performed in advance, and the above-described anchor material hole insertion step and the first step.
In the same manner as in the injection step of step 1, the hole is inserted into the drainage pipe 100, ... And the tip of the tube is fixed by injecting a hardening material, or before the lining, the tube hole insertion step and the first step described above. In the same manner as in the injection step, the drainage pipes 100, ... Are drilled into the natural ground BG and the tip thereof is grounded BG.
After that, the drainage pipes 100, ... Are lined on the slopes so as not to fill the protruding base end portions. G3 indicates a hardening material injected from the tip of the drainage pipe 100 through the inside of the drainage pipe 100 when fixing the drainage pipes 100, .... Thus,
The water contained in the back ground BG is the drain pipe 100, ...
The lining C3 is discharged to the front side of the lining C3 as indicated by the arrow in the figure.

<Others> (a) On the other hand, in the present invention, preliminary drilling can be performed prior to the insertion of the self-drilled hole in the tubular body to form a prepared hole at the planned tubular body insertion position. In this case, it is preferable to drill a hole having a diameter larger than the diameter of the self-drilled hole formed by the tubular body.

If such preliminary drilling is performed, the preliminary drilling and the self-drilling of the pipe body are performed, so that it is troublesome twice, but the subsequent insertion by the self-drilling hole of the pipe body becomes easy. Further, although it has been preliminarily drilled, it has been described above that the insertion hole often collapses before insertion of the tubular body, but in the present invention, the tubular body is inserted by self-drilling. So
Even in such a case, there is substantially no possibility that the tubular body cannot be inserted as in the conventional example, and smooth insertion is possible.

(B) In the above example, the tip of the anchor material 1 is fixed and the gap S between the anchor material 1 and the anchor hole AH is obtained.
Injection for 1 filling (first injection) and existing lining C1
The injection for filling the cavity H on the back surface (second injection) is performed twice. However, the present invention is not limited to this, and for example, in the above-described first injection, the tip ejection port P
It is also possible to discharge the hardening material from both H, ... And the base end side discharge ports BH1 to BH3 and simultaneously inject the hardening material to both of these target parts to fix the anchor material on the ground.

(C) In the present invention, when fixing the tubular body to the insertion target site, it is not necessary to inject the hardening material through the tubular body (anchor material 1) as in the above example. Within the range, the tip of the tubular body can be fixed to the ground by another known method.

[0041]

As described above, according to the present invention, the tubular body can be inserted easily and smoothly, and the working efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing an anchor material and an air supply inner tube according to the present invention.

FIG. 2 is a vertical cross-sectional view showing a state in which an air supply inner pipe is attached to an anchor material.

FIG. 3 is a partial vertical cross-sectional view showing a self-drilling step.

FIG. 4 is a longitudinal sectional view and an enlarged view of a main part, showing another example of the air supply inner pipe.

FIG. 5 is a partial vertical cross-sectional view showing a state after completion of the ground drilling step.

FIG. 6 is a partial vertical cross-sectional view showing a first implantation step.

FIG. 7 is a partial vertical cross-sectional view showing a first packer device.

FIG. 8 is a partial vertical cross-sectional view showing the swelled state of the packer.

9 is an enlarged view of a main part of FIG.

FIG. 10 is a partial vertical cross-sectional view showing a second packer device.

FIG. 11 is a partial vertical cross-sectional view showing a tension fixing step of the tubular anchor material.

FIG. 12 is a partial vertical cross-sectional view showing a new lining process.

FIG. 13 is a partial vertical sectional view showing a second implantation step.

FIG. 14 is a partial vertical cross-sectional view showing a finishing process.

FIG. 15 is a schematic vertical sectional view showing a second embodiment.

[Explanation of symbols]

1 ... Tubular anchor material, BH1 to BH3 ...
PH ... Tip discharge port, 3 ... Air supply inner tube, 5 ... First packer device, 50 ... Second packer device, 9 ... One-touch operation means, C1 ... Existing lining work, C2 ... New lining work, B
G ... Ground.

Claims (3)

(57) [Claims] 1. A method for inserting and setting a tubular body into an insertion target site while leaving a base end portion thereof, the method including a tip bit, the tip section and the insertion target section.
The through hole to the base end side part excluding the base end part that is not inserted into
Using a tube having Re respectively, and drilling the insertion target region, self-drilling to be inserted into the front <br/> Symbol insertion target in site left its base end portion of the tube body by the drilling In the insertion step and without removing the pipe body that has been drilled,
Discharge through the through hole in the tube and the tip,
Discharge hardening material is placed in the gap between the outer surface of the pipe and the wall of the insertion hole.
First injection step of injecting at least the tip side portion
When, thereafter, curing material injected in the first implantation step
Before curing, the compressed air is passed through the tubular body to the proximal side.
A step of blowing out only from the through-hole of the part, and thereafter, the hardening material injected in the first injection step
By hardening the, the tube is fixed to the insertion target site.
And the fixing step of the tube body, and thereafter, a hardening material is applied to the inside of the tube where it is fixed.
And discharge through the through hole in the base end side,
The chemical compound is applied to the remaining portion not injected by the first injection step.
Injected against, characterized in that it comprises a second implantation step, the insertion method of installing the tube. 2. The method of inserting and installing a tubular body according to claim 1, wherein the boring air is blown out through the tubular body only through the through-hole at the tip end portion during the boring. 3. The hole forming air when inserting the air supplying inner pipe into the pipe body and communicating the air supplying inner pipe only with the through hole at the tip of the pipe body at the time of the hole making. The method for inserting and installing a tubular body according to claim 1, wherein the hole is drilled while being blown out from only the through hole of the distal end portion of the tubular body through the inner pipe for air supply.