JP3359588B2 - Repair method of existing lining - 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 for repairing slopes, earth retaining walls, tunnels, water stops, and the like. More specifically,
The present invention relates to a method for repairing the existing lining without covering the ground with concrete, mortar, etc. without destroying the surface. For example, spraying with mortar or concrete (hereinafter referred to as mortar) is performed to prevent collapse of the ground, weathering of a slope, and the like. It relates to a method of repairing concrete, mortar surfaces, etc. that have fallen off.

[0002]

2. Description of the Related Art In order to prevent the slope of artificial soil formed by cutting or embankment of the ground, that is, the slope from being collapsed by wind and rain, it is necessary to protect the slope by planting plants or spraying mortar. Called mechanic. One of the slope protection works, mortar spraying,
It is widely used for cheap and simple construction.

In recent years, the existing slope after the mortar or concrete spraying work has been weathered, and has been cracked or collapsed due to outflow of earth and sand from the ground. For this reason, a cavity may be formed between the ground and the back surface of the shotcrete. For this reason, mortar or concrete is entirely or partially stripped off, and slope protection is performed again by spraying to repair the slope.

However, in such a conventional method, when repairing an existing lining, work for stripping weathered mortar or concrete is involved, so that falling objects are generated and roads under the slope are cut off or scaffolds are cut off. There are problems such as building.

[0005] In order to solve such a problem, the present applicant has
In Japanese Patent Publication No. 5-22775, the cavity between the lining and the back ground was measured without destroying the lining,
Next, after drilling the anchor hole through the existing lining by drilling the hole to the ground, pull out the drill,
Subsequently, a method was proposed in which an anchor material was inserted into the anchor hole, and a hardening material was filled into the cavity between the lining and the back ground through the anchor material.

[0006]

However, in this conventional method, after drilling an anchor hole to the ground by penetrating an existing lining with a drill hole, the drill hole is pulled out, and then the anchor hole is removed. Since the anchor material was inserted into the hole, drilling and inserting the anchor material were bothersome.

[0007] Generally, the ground behind the existing lining is often weathered and weakened due to rainwater penetration or the like.
Even when the anchor hole is opened, it may be broken when the anchor is inserted, and the anchor material may not be inserted smoothly. In that case, drill the anchor hole again,
After a while, there is no choice but to insert the anchor material, and the number of labors is doubled.

Accordingly, a main object of the present invention is to repair an existing lining, reduce the number of working steps, and make it possible to easily and smoothly insert an anchor material, thereby improving the working efficiency. It is in.

[0009]

According to a first aspect of the present invention, there is provided a method of repairing an existing lining covering a ground, comprising a tip bit, and at least a tip portion and a head. Using a tubular anchor material having a discharge port at a base end portion except for the air supply inner pipe inserted into a flow path in the tubular anchor material, and connecting the air supply inner pipe to the discharge port at the distal end portion In a state of being communicated only with the hole, the drilling air is blown out only from the discharge port at the distal end portion through the air supply inner pipe, and penetrates the existing lining to drill into the ground on the back surface thereof, Inserting the anchor material into the ground while leaving the head part by the drilling, the self-cutting hole insertion step of the tubular anchor material, and without pulling out the drilled and inserted tubular anchor material, the hardened material is removed from the tubular material. In and before anchor material A first injection step of discharging through a discharge port of the distal end portion and injecting the discharge hardening material into at least a distal end portion in a gap between the outer surface of the tubular anchor material and the inner surface of the anchor hole formed by the drilling; By curing the injection-hardened material, at least the distal end portion of the tubular anchor material is fixed to the ground, and the head of the tubular anchor material is fixed to the surface of the existing lining. A fixing step, and thereafter, a new lining step of newly lining the surface of the existing lining, and thereafter, a hardening material is discharged into the fixed tubular anchor material and the base end portion. A second injection step of injecting, through an outlet, at least into a cavity between the back surface of the existing lining and the ground surface, and a method of repairing the existing lining.

According to a second aspect of the present invention, there is provided a method of repairing an existing lining covering a ground, wherein a tubular anchor member having a tip bit and having a discharge port at least in a base end portion excluding at least a tip end portion and a head portion. A hole is drilled through the existing lining to the inside of the ground on the back side of the existing lining, and the anchor material is inserted into the ground while leaving the head thereof by the drilling. Without removing the drilled and inserted tubular anchor material, discharging the stiffening material in the tubular anchor material and through the discharge port at the tip side portion, and discharging the hardened material with the outer surface of the tubular anchor material and the drilling hole. Injecting into at least the tip side portion in the gap between the inner surface of the anchor hole formed by the above and the first injecting step after the first injecting step and at least the first injecting step. Before injecting the hardening material is hardened in,
The step of blowing the compressed air through only the discharge port of the base end portion through the anchor material, and the hardening of the injection hardening material in the first injection step causes at least the distal end portion of the tubular anchor material to be grounded. Fixing the head of the tubular anchor material to the surface of the existing lining, and fixing the tubular anchor material, and then newly lining the surface of the existing lining, Work step, and thereafter, the hardening material, through the discharge port of the anchored tubular anchor material and the base end portion, at least to the cavity between the back surface of the existing lining and the ground surface And a second injecting step of injecting the existing lining.

[0012] Further, with respect to the injection of the hardening material, an inner tube having a relatively large-diameter enlarged portion at a distal end portion, and an inner tube portion surrounding the inner tube portion behind the enlarged portion and extending in a longitudinal direction with respect to the inner tube. An outer tube slidable back and forth along a flexible piper member surrounding the inner tube portion between the outer tube and the inner tube enlarged-diameter portion. Operating means for sliding back and forth with respect to the pipe, and sliding the inner pipe backward with respect to the outer pipe by means of this operating means, thereby allowing the inner pipe to move between the enlarged portion of the inner pipe and the outer pipe. Using a packer device configured to sandwich and compress the flexible packer member to project laterally; at least one of the hardening material injection in the first injection step and the hardening material injection in the second injection step At the time, the injection pipe part of the packer device is After being inserted into the internal flow path of the anchor material, the operating means causes the flexible packer member to protrude to the side, and the protruding packer member causes a gap between the inner surface of the anchor material and the outer surface of the injection pipe portion. By supplying the hardening material into the anchor material through the inner tube of the packer device while maintaining the closed state, whereby the hardening material injection in the first injection step and the second hardening material injection are performed. It is proposed to perform at least one of the hardening material injection in the injection step of (1).

Regarding the injection and the blow-out of the compressed air, as a more specific example, an inner pipe having a relatively large-diameter enlarged portion at a distal end portion, and an inner pipe portion behind the enlarged portion are provided with a gap. An outer pipe surrounding and being slidable back and forth with respect to the inner pipe in the longitudinal direction thereof and having a compressed air outlet formed on a side surface; and an inner pipe between the outer pipe and the inner pipe enlarged portion. A flexible packer member surrounding the portion.
An injection pipe portion; and an operating means for sliding the inner pipe back and forth with respect to the outer pipe. The operating means causes the inner pipe to slide backward with respect to the outer pipe, whereby the inner pipe is moved. Using a packer device configured to sandwich and compress the flexible packer member between the enlarged diameter portion and the outer tube so as to protrude laterally; hardening material injection and second injection in the first injection step At least one of the hardening material injection in the injection step of, after inserting the injection pipe portion of the packer device into the internal flow path of the anchor material, the operating means to extend the flexible packer member to the side, The overhanging packer member closes the gap between the inner surface of the anchor material and the outer surface of the injection pipe portion. Thereafter, while keeping this closed state, the hardened material is passed through the inner pipe of the packer device. And supplying at least one of the hardening material in the first injecting step and the hardening material in the second injecting step, and at least after the first injecting step and Before the hardening material injected in the first injection step hardens, pressurized air is passed through the gap between the inner pipe and the outer pipe from the compressed air outlet to the gap between the outer surface of the outer pipe and the inner face of the anchor material. It is proposed that the air is blown out and that the blown-out air is further blown out from a discharge port of the anchor material base end side portion.

<Operation> The main point of the present invention lies in that the anchor material is drilled by the drill bit at the tip of the anchor material and inserted into the back ground. That is, the present invention is characterized by self-cutting hole insertion in which the anchor insertion and the drilling of the anchor hole are performed simultaneously. Therefore, according to the present invention, it is not necessary to drill the anchor hole before inserting the anchor, and the number of labors can be reduced by that amount.
Also, even when the anchor hole is pre-drilled prior to anchor insertion as described later, by self-drilling the anchor material along the prepared hole, regardless of partial collapse of the prepared hole, etc. , The anchor material can be inserted smoothly.

[0016]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. <Detection of cavities etc.>
At the time of construction, it is necessary to accurately identify where on the back of the existing lining the hollow is formed. As a known means for specifying the cavity, for example, a method of detecting using a reflected wave of ultrasonic waves, a method of detecting and specifying the difference in heat radiation between the cavity and other parts by using a thermal infrared camera, a method using a hammer There is a method of hitting a lining, hearing the sound at that time, and detecting it by experience. Since these are all known methods, the explanation is omitted here. Once the location of the cavity has been identified, a new anchor is provided at that location as described below.

<Step of Inserting Hole into Tubular Anchor Material> In the present invention, for example, as shown in FIG.
... and a tubular anchor member having distal end outlets PH, ... and proximal end outlets BH1 to BH3 formed in the distal end surface of the distal end bit 1B and the proximal end portion excluding the head 1H, respectively. (Hereinafter, also simply referred to as anchor material) 1 is used as a new anchor. The head 1H is a non-insertion portion, and its length is appropriately determined according to the insertion depth of the anchor member 1 and the like. Further, in the illustrated example, the base end side discharge ports BH1 to BH1
A plurality of BH3s are provided at intervals in the longitudinal direction, and one of them is located at the same depth direction position as the cavity between the back surface of the existing lining and the ground surface after the insertion described below. It comes to come.

As shown in FIG. 3, the tubular anchor 1 penetrates through the existing lining C1 and drills a hole in the ground BG on the back side thereof. Insert into the ground BG leaving 1H. In the illustrated example, compressed air is blown out from the discharge end of the tip bit 1B, and the drilled air is put on the blown air to remove drilling dust from the gap S1 between the outer surface of the anchor material 1 and the anchor hole wall AH1.
The so-called air drilling that discharges to the surface side is adopted. 2 indicates a rock drill.

When such air drilling is performed, drilling air is also blown from the base end side discharge ports BH1 to BH3.
The blowing air acts to prevent the discharge of drilling debris,
Discharge of drilling debris is not performed smoothly. Therefore, as shown in FIGS. 1 and 2, the air supply inner pipe 3 is inserted into the tubular anchor member 1 and the air supply inner pipe 3 is communicated only with the tip end discharge holes PH,. It is preferable that the drilling is performed while the drilling air is blown out only from the tip discharge ports PH,... Through the internal flow path 3F of the inner pipe 3 for supplying air. In this example, the distal end surface 3a of the air supply inner pipe 3 is directly connected to the inlet surface 1b to the distal end discharge port on the back surface of the distal end bit 1B, but as shown in FIG. The distal end outlet 3a of the pipe 3 is connected to the anchor member 1 between the base end side discharge port BH1 on the foremost side and the front end discharge port entrance 1b.
The internal flow path 3F of the air supply inner pipe 3 and the inlet 1b of the distal end discharge port can be indirectly connected via a part of the anchor material flow path 1F. In this case, the outer peripheral surface of at least the distal end portion 30 of the air supply inner tube 3 is brought into close contact with the anchor material inner peripheral surface (in the illustrated example, the air supply inner tube 3
A seal ring R is wound around the outer peripheral surface of the distal end portion 30 for tight sealing.

A connecting portion 4 for connecting the anchor material 1 and the rock drill 2 is attached to the base end of the air supply inner pipe 3 in the example shown in FIGS. The connection portion 4 has a nut portion 4a on the distal end side, and is screwed to the outside of a thread 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 drill 2 and the air supply including the connection portion 4 are removed from the anchor material 1 in the inserted state. The inner tube 3 is removed (FIG. 5 shows a state where the inner tube 3 is removed).

<First Injection Step> Next, as shown in FIG. 6, the hardened material G1 is discharged into the tubular anchor material 1 and the distal end portion without pulling out the drilled and inserted tubular anchor material 1. Discharge through outlets PH, ... The discharge hardening material G1 is injected and filled into at least the front end 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 also penetrates into the back ground BG around the gap as shown by G11 in the drawing.

Here, preferably, the first packer device 5 shown in FIGS. 7 to 9 or the second packer device 5 shown in FIG.
Inject using 0. First, the common features of the two packer devices 5 and 50 will be described. Both of them have the following configuration.

That is, the inner tube 6 having a relatively large-diameter enlarged portion 6a at the distal end portion and the inner tube portion behind the enlarged diameter portion 6a are surrounded with a gap, and the inner tube 6 has a longitudinal direction. An outer tube 7 slidable back and forth along the direction,
An injection pipe portion 8 including a tubular flexible packer member 5P surrounding the inner pipe portion between the front end face of the outer pipe 7 and the rear end face of the inner pipe enlarged portion 6a; Is provided with one-touch operation means 9 for sliding the front and rear with respect to the outer tube 7.

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

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

As described above, there is no difference between the two packer devices 5 and 50 in the extension mechanism of the packer member 5P (a different structure will be described later), and both can extend the packer member 5P with one touch. Therefore, there is an advantage that the packer can be extended much more quickly and easily as compared with a known type device in which the packer is extended by tightening the nut. However, in the present invention, a conventional nut-tightening type (see FIG. 5 of Japanese Patent Publication No. 5-22775) can be used.

At the time of injection, first, in a state where the flexible packer member 5P does not protrude to the side, the packer device 5P is opened.
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 base end side discharge port BH1 on the most distal end side of the anchor material 1, that is, Preferably, the most proximal side outlet port BH1
More distally. Thereafter, as shown in FIG. 9, the packer member 5P is extended laterally by the one-touch operation means 9, and the gap S2 between the inner surface of the anchor member 1 and the outer surface of the injection pipe portion 8 is formed by the extended packer member 5P. It is in the closed state. Then, the hardening 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 distal end discharge ports PH,.

Thus, the hardening material G1 can be discharged from only the distal end discharge ports PH,... Through the inside of the anchor material 1, and can be injected and filled into the gap S1 between the outer surface of the anchor material 1 and the inner surface AH1 of the anchor hole. .

In the injection of the hardening material only at the tip of the anchor material, the injected hardening material is too large or the injection speed is too high. BH3 may be blocked. In this case, it is supposed that smooth injection of the hardening material becomes impossible or impossible 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, compressed air outlets 7a, 7a are formed at the distal end side of the outer tube 7, and the compressed air Outer surface of inner tube 6 and outer tube 7
The one-touch operation means 9 is provided with a compressed air supply port 9a which communicates with the inner surface via a gap S3.
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 the gap S3 is blown from the compressed air outlets 7a, 7a to the gap S4 between the outer surface of the outer tube 7 and the inner surface of the anchor member 1, and the blown air is further discharged to the base end discharge port BH1 of the anchor member 1.
BH3 to the base end discharge ports BH1 to BH3.
It is possible to blow off the uncured hardening material that blocks the BH3 and the gaps S4, S3, etc. communicating with the BH3. Thus, the anchor material 1 is provided by the hardened material G1 obtained by the first injection.
Can be prevented from blocking the communication path to the base end side discharge ports BH1 to BH3. Note that the process chart of FIG.
Is shown. After injection, the packer device 5 is withdrawn from the anchor material.

<Wait for Hardening> On the other hand, the hardening of the hardening material G1 injected in the above-described first injection step waits until the distal end portion of the tubular anchor material 1 is fixed to the ground.

<Tension fixing step of tubular anchor material> When the hardening material G1 is hardened by the first injection, FIG.
As shown in the figure, the anchor insertion hole 10a is inserted into the head 1H of the tubular anchor member 1 protruding from the surface of the existing lining C1.
Then, the tension nut 11 is screwed into a screw portion 1N (not shown in FIG. 11) formed on the peripheral surface of the anchor material head 1H and tightened. As a result, the tension plate 11 presses the support plate 10 against the surface of the existing lining C1 while taking a reaction force against the ground BG via the anchor material 1. Thus, the head 1H of the tubular anchor material is fixed to the surface of the existing lining C1, and the ground acting on the tubular anchor 1 fixed across the ground BG and the existing lining C1 is ground. The mountain BG and the existing lining C1 can be firmly integrated.

<New Covering Step> Next, as shown in FIG. 12, the surface of the existing covering C1 is newly covered to construct a new covering C2. In the new lining, it is preferable to adopt a spraying method using mortars as shown in the illustrated example in order to bury the protrusion of the anchor material head 1H. In particular, at the time of spraying, a cap 12 (preferably made of rubber) is fitted into the opening 1C of the base end surface of the tubular anchor material 1 for the second injection described below. It is preferable to perform a new spray so that the end is exposed. However, lining with another concrete block or the like may be performed.

<Second Injection Step> When the new lining is completed, as shown in FIG. 13, the hardened material is removed from the tensioned and fixed tubular anchor material 1 and the base end portion of the anchor material 1. The cavity H between the back surface of the existing lining C1 and the surface of the ground BG is injected and filled through the discharge ports BH1 to BH3.

In the illustrated example, the cap 12 is removed from the front side of the new lining C2, and the injection is conducted from the front side of the new lining C2 to the base end opening 1C of the anchor material 1 embedded therein. A hole 13 is formed. Then, 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 After the packer member 5P is extended to close the gap at the mouth of the injection hole 13, the hardening material is injected.

At this time, one of the plurality of base end side discharge ports BH1 to BH3 of the anchor member 1 (BH3 in the illustrated example).
Comes in the same depth direction as the cavity H between the back surface of the existing lining C1 and the surface of the ground BG, and therefore, mainly from the base end side discharge port BH3 to the cavity H. , BH2,..., BH2,... In the gap S1 between the outer surface of the anchor member 1 and the inner surface AH1 of the anchor hole.
Injection filling is performed for the remaining portion that has not been injected by the injection. At this time, in a normal case, the injection hardening material also penetrates into the back ground BG around the gap S1 and the cavity H as indicated by G22 in the drawing.

<Post-treatment> If necessary, mortars M are filled in the residual holes 13 formed by the cap 12 on the surface of the new lining C2 used for the second injection, and the mortar M is filled with the mortar M. Finish ironing so that the C2 surface becomes a flat surface without holes.

<Others> (A) On the other hand, in the present invention, preliminary drilling is performed prior to insertion of the self-cutting hole of the anchor material, and an anchor pilot hole can be formed at the expected anchor position. In this case, it is preferable to drill a hole larger in diameter than the hole diameter of the self-drilling hole by the anchor material.

When the preliminary drilling is performed, the preliminary drilling and the insertion of the self-cutting hole of the anchor material are performed twice, which is troublesome, but the subsequent insertion of the anchor material by the self-cutting hole becomes easy. In addition, although the preliminary drilling was performed, it has been described that the anchor hole is often slightly collapsed before the anchor material is inserted, but in the present invention, the anchor material is inserted by the self-drilling hole. Therefore, even in such a case, there is substantially no possibility that the anchor material cannot be inserted unlike the conventional example, and smooth insertion is possible.

(B) In the above example, the distal end portion of the anchor member 1 is fixed and the gap S between the anchor member 1 and the anchor hole AH is fixed.
1. Injection for 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. For example, in the above-described first injection, the tip discharge port P
H,... And the curable material is discharged from both of the base-side discharge ports BH1 to BH3, and simultaneously injected into both target portions, and the cap mounting, the second injection step, and the post-processing are omitted. be able to.

(C) In the above example, the fixing of the distal end portion of the anchor material 1 to the ground is performed by injecting the hardening material G1, but within the scope of the present invention, by other known methods,
The tip of the anchor material can be fixed to the ground.

(D) In the above example, the anchor member 1 is tensioned. However, if excessive tension acts on the portion having the hollow portion H of the existing lining C1, the portion may break. is assumed. Therefore, tension nut 1
1, the anchor material head 1H may simply be in contact with the surface of the existing structure C1.

[0044]

As described above, according to the present invention, the number of working steps can be reduced, and the insertion of the anchor member can be performed easily and smoothly, so that the working efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an anchor material and an air supply inner pipe according to the present invention.

FIG. 2 is a longitudinal sectional view showing a state where an air supply inner pipe is attached to an anchor member.

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

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

FIG. 5 is a partial longitudinal sectional view showing a state after a ground drilling step is completed.

FIG. 6 is a partial longitudinal sectional view showing a first injection step.

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

FIG. 8 is a partial longitudinal sectional view showing the packer swelling state.

FIG. 9 is an enlarged view of a main part of FIG. 8;

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

FIG. 11 is a partial longitudinal sectional view showing a tension fixing step of the tubular anchor member.

FIG. 12 is a partial longitudinal sectional view showing a new lining process.

FIG. 13 is a partial longitudinal sectional view showing a second injection step.

FIG. 14 is a partial longitudinal sectional view showing a finishing step.

[Explanation of symbols]

1: tubular anchor material, BH1 to BH3: base end side discharge port,
PH: tip discharge port, 3: inner pipe for air supply, 5: first packer device, 50: second packer device, 9: one-touch operation means, C1: existing lining, C2: new lining, B
G: Ground mountain.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E02D 5/80 E02D 17/20 104 E21D 20/00

Claims (4)

(57) [Claims] 1. A method of repairing an existing lining covering a ground, wherein a tubular anchor material having a tip bit and having a discharge port at least in a base end portion excluding a tip end portion and a head portion is used. Insert the air supply inner pipe into the flow path in the tubular anchor material, and place the air supply inner pipe in communication with only the discharge port at the tip side portion, and cut the drilling air into the air supply inner pipe. The pipe is blown out only from the discharge port at the tip portion through a pipe, penetrates the existing lining, and drills a hole in the ground on the back side, and inserts the anchor material into the ground with the drilling leaving the head part. Self-cutting hole insertion process of the tubular anchor material, and discharging the hardening material through the discharge port in the tubular anchor material and the tip side portion without pulling out the drilled and inserted tubular anchor material. Tube material A first injection step of injecting at least a distal end portion in a gap between the outer surface of the anchor material and the inner surface of the anchor hole formed by the drilling, and at least the distal end side of the tubular anchor material by curing the injection hardening material. Fixing the portion to the ground and fixing the head of the tubular anchor material to the surface of the existing lining, and fixing the tubular anchor material, and thereafter, the surface of the existing lining is renewed. Lining, a new lining step, and thereafter, the hardening material is passed through the discharge port in the anchored tubular anchor material and the base end portion, and at least the back surface of the existing lining material and the ground surface A second injecting step of injecting into a cavity between the two. A method of repairing an existing lining, comprising: 2. A method for repairing an existing lining material covering a ground, comprising using a tubular anchor material having a tip bit and having a discharge port at least at a base end portion excluding a tip end portion and a head portion, Self-cutting hole insertion process of a tubular anchor material, which penetrates the existing lining and drills a hole in the ground on the back surface thereof, and inserts the anchor material into the ground while leaving the head thereof by the drilling; Without pulling out the drilled and inserted tubular anchor material, the stiffening material was discharged through the discharge port in the tubular anchor material and the tip side portion, and the discharged stiffening material was formed by the outer surface of the tubular anchor material and the drilled hole. A first injecting step of injecting at least a tip side portion in a gap between the inner surface of the anchor hole and an injecting step after the first injecting step and at least in the first injecting step Before the curing material is cured, a step of blowing compressed air through only the discharge port of the base end portion through the anchor material, and by curing the injection-cured material in the first injection step, at least the tubular anchor material Fixing the tip side portion to the ground, fixing the head of the tubular anchor material to the surface of the existing lining, and fixing the tubular anchor material. A new lining step for newly lining; and thereafter, a hardening material is passed through at least the back of the existing lining and the ground surface through the discharge port in the fixed tubular anchor material and the base end portion. A second injection step of injecting into the cavity between the steps (a) and (b). 3. An inner tube having a relatively large-diameter enlarged portion at a distal end portion, and an inner tube portion surrounding the inner tube portion behind the enlarged portion and sliding back and forth along the longitudinal direction with respect to the inner tube. An infusion tube section including a free outer tube, and a flexible packer member surrounding the inner tube portion between the outer tube and the inner tube enlarged portion; Operating means for slidably moving the inner pipe backward with respect to the outer pipe by means of the operating means, whereby the flexibility between the enlarged diameter portion of the inner pipe and the outer pipe is increased. A packer device configured to sandwich and compress the packer member so as to protrude laterally; at least one of the hardening material injection in the first injection process and the hardening material injection in the second injection process, the packer device Flow through the injection pipe section After that, the flexible packer member is extended laterally by the operating means, and the extended packer member closes the gap between the inner surface of the anchor material and the outer surface of the injection pipe portion. Then, while maintaining the closed state, the hardening material is supplied into the anchor material through the inner pipe of the packer device, so that the hardening material is injected in the first injection process and the hardening material injection in the second injection process. The method for repairing an existing lining according to claim 1 or 2, wherein at least one of the following is performed. 4. An inner tube having a relatively large-diameter enlarged portion at a distal end portion and an inner tube portion behind the enlarged portion with a gap therebetween, and extending along the longitudinal direction with respect to the inner tube. Including an outer tube slidable back and forth and having a compressed air outlet on a side surface, and a flexible packer member surrounding an inner tube portion between the outer tube and the inner tube enlarged portion. A pipe portion; and operating means for sliding the inner pipe back and forth with respect to the outer pipe. The operating means causes the inner pipe to slide backward with respect to the outer pipe, thereby expanding the inner pipe. Using a packer device configured to sandwich and compress the flexible packer member between a diameter portion and the outer tube so as to protrude laterally; hardening material injection in the first injection step and second At least one of the hardening material injection in the injection step, After inserting the injection pipe portion of the packing device into the internal flow path of the anchor material, the flexible packer member is extended laterally by the operation means, and the anchor material inner surface and the anchor material are extended by the extended packing member. The first injection is performed by supplying a hardening material into the anchor material through the inner pipe of the packer device while keeping the closed state with the gap between the outer surface of the injection pipe portion and the closed state. Performing at least one of the hardening material injection in the step and the hardening material injection in the second injecting step, and before the hardening material injected in the first injecting step is hardened after the first injecting step. The compressed air is blown out from the compressed air outlet through the gap between the inner pipe and the outer pipe into the gap between the outer surface of the outer pipe and the inner surface of the anchor material. The method for repairing an existing lining according to claim 1 or 2, wherein the lining is blown out from a discharge port at a base end side portion of the anchor material.