JP3120001B2 - Tunnel lining method - 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 lining method for forming a lining on the inner wall surface of a tunnel in accordance with the excavation of the tunnel.

[0002]

2. Description of the Related Art Conventionally, when a tunnel is excavated in the ground such as a bedrock, a concrete containing a quick-setting agent is immediately sprayed on the inner wall surface of the tunnel after excavating a fixed length tunnel. After the lining is applied and the shotcrete is hardened, a plurality of rock bolts are driven radially from the inside of the tunnel in the direction of the cross section of the tunnel, and then the shotshot concrete surface is covered with a membrane waterproof sheet made of a polymer resin. After coating, a secondary lining is performed by installing an inner mold (centre) at a position at a certain distance from the waterproof sheet and casting concrete into a gap between the waterproof sheet and the inner mold. .

[0003]

However, according to the concrete spraying method, since concrete is sprayed at a high speed on the tunnel wall surface, the concrete is sprayed without sufficiently adhering, and the work environment is deteriorated. In addition, there is a possibility that the sprayed concrete may be separated from the tunnel wall surface, resulting in a loss of material. further,
After the sprayed concrete has hardened to some extent, if the concrete is not sprayed on the surface again, the concrete lining of the required thickness cannot be constructed,
There is a problem that the work efficiency of the tunnel lining is significantly reduced.

Further, since the surface of the hardened shotcrete has an uneven surface corresponding to the unevenness of the inner wall surface of the tunnel, if the waterproof sheet is coated at the time of the secondary lining, when the sheet is stretched, Alternatively, at the time of secondary concrete casting, the waterproof sheet may be partially damaged due to sliding contact or catching between the waterproof sheet and the uneven surface, so that sufficient waterproofness cannot be imparted to the tunnel. In addition, the waterproof sheet is cut off the edge of the primary lining and becomes integral with the secondary lining concrete. However, since the sprayed concrete surface, which is the primary lining, has an irregular shape, Even if the edge is cut by the waterproof sheet, when an earthquake or the like occurs, the vibration is transmitted to the secondary lining concrete surface through the uneven surface,
There was a problem that cracks occurred in the next lining concrete.

[0005] Further, when the water is completely stopped by the waterproof sheet, the pressure of the groundwater flowing out from the ground acts on the waterproof sheet, which may cause a part of the sheet to be stretched or damaged. Also, there is a problem in that the groundwater pressure acts, cracks are generated in the secondary lining concrete, and groundwater enters the tunnel. An object of the present invention is to provide a tunnel lining method capable of completely solving such a problem.

[0006]

According to a first aspect of the present invention, there is provided a method for lining a tunnel, the method comprising: At the position, a plurality of rigid water blocking wall materials formed in a form shape along the tunnel inner wall surface are assembled in an arch shape in the tunnel circumferential direction, and a gap between the tunnel inner circumferential wall surface and the water blocking wall material is provided. It is characterized in that primary concrete is poured into the part.

The method for lining a tunnel according to a second aspect of the present invention is characterized in that the tunnel length is set at a predetermined distance from the inner wall surface of the tunnel in accordance with the excavation of the tunnel of a predetermined length.
With a constant width in the vertical direction and curved in the arc of the tunnel
Made of transparent hard synthetic resin material
In addition , a plurality of rigid water blocking wall materials formed in a form shape along the tunnel inner wall surface are assembled in the tunnel circumferential direction, and the primary concrete is inserted into the gap between the tunnel inner circumferential wall surface and the water blocking wall material. the is characterized in that Da設.

[0008] As the water-stop wall material used in the above method, as set forth in claim 3, formed on the smooth surface of the inner surface with which a recess on its outer surface several places, further, the four-way end face Waterproof packing is installed on the inside, and through holes for concrete injection and lock bolt driving through the inner and outer surfaces are drilled in the appropriate places, and cutout grooves for connecting the waterstop wall materials are provided on the four inside surfaces. It has a structure consisting of

The outer surface of the water blocking wall material is
As described in 4 , a long water collecting pipe is attached in the circumferential direction of the tunnel, and further, the lower end of the water blocking wall material disposed at the lowermost part in the tunnel has a drainage communicating with the inside of the tunnel from the water collecting pipe. Pipes are provided.

[0010]

[Function] A plurality of rigid water blocking wall materials are assembled along the inner wall surface of the tunnel, and concrete is poured into a gap between the water blocking wall material and the inner wall surface of the tunnel. The lining work can be performed in a good working environment without generating dust like the conventional concrete spraying method,
Since the water blocking wall material is formed in a rigid formwork shape, it is easy to handle and the assembly work can be easily and accurately performed. In addition, the water blocking wall material is integrated with the cast concrete. In addition, a tunnel lining is formed that can reliably prevent groundwater from penetrating into a tunnel without causing breakage as compared with the conventional sheeting.

According to the invention described in claim 2,
From the inside wall of the tunnel according to the tunnel excavation of the specified length
At a position with a certain interval, a certain width in the tunnel length direction
With a certain thickness curved in the arc of the tunnel circumferential direction
Made of transparent hard synthetic resin material,
Rigid water-stops formed in a form that conforms to the shape
Since the wall material is assembled in the circumferential direction of the tunnel, 1
Next, use a transparent hard synthetic resin
From outside through the water blocking wall material
The construction management is easy and the lining is accurate.
Is obtained.

At the time of this tunnel lining, if the water blocking wall material having the structure described in claim 3 is used, the water blocking wall material is assembled while joining the water blocking packings arranged on the four end faces together. The recesses formed at a plurality of outer surfaces of the water-stop wall material enable adhesion and integration with the primary lining concrete, while the inner surface is formed as a smooth surface, so that the water-stop wall material and the secondary lining concrete are formed. Is cut off without being integrated, and the vibration at the time of the earthquake hardly transmits to the secondary lining concrete.

[0013] According to the water blocking wall material structure of the fourth aspect, groundwater infiltrates into the water collecting pipe disposed on the outer surface thereof, and flows into the tunnel through the drain pipe provided in the lowermost water blocking wall material. Therefore, the groundwater pressure applied to the water blocking wall material and the secondary lining concrete can be reduced.

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a tunnel T of a first embodiment of the present invention; The excavation length of the tunnel is a length that does not collapse according to the strength of the rock mass to be excavated. After the excavation of the tunnel T of a certain length, the excavator is retracted, and the water blocking wall material 1 and the lock bolt 9 are carried into the excavated tunnel T.

The water blocking wall material 1 is made of a transparent hard synthetic resin material such as an acrylic resin, a polycarbonate resin, a vinyl chloride resin, and has a certain width in the tunnel length direction and along the tunnel circumferential direction. As shown in FIG. 2, a concave portion 2 is provided on the four sides of the outer surface, which is a convex surface side, while the concave portion 2 is formed on the outer surface, which is a front rectangular form shape having a constant thickness curved in an arc shape. The inner surface is formed as a smooth surface. 1a is a rib provided around the recess 2.

Further, a through hole 3 for injecting concrete and locking bolts having an appropriate diameter penetrating between the inner and outer surfaces at an appropriate interval in the length direction is provided at a central portion in the width direction of the water blocking wall material 1.
Several (three places in the figure) are formed, and two dovetails on the inner surface are formed with notches 4 in the form of a flat dovetail having a certain depth at a certain interval. Yes (see FIGS. 2 and 9), a narrow portion of the cutout groove 4 is open at each end face.

Further, a circumferential groove 5 is provided at the center in the thickness direction of the four end surfaces of the water blocking wall material 1, and a series of synthetic rubber waterproof packings 6 project from the circumferential groove 5. A water collecting pipe 7 long in the circumferential direction of the tunnel is integrally attached to one end of the outer surface of the water blocking wall material 1 over the entire length. The water collecting pipe 7 is provided with a large number of small water collecting holes 7a at small intervals in the longitudinal direction. The small water collecting holes 7a are fixed to the water blocking wall material 1 with the small holes 7a facing outward. At the same time, the surface is covered with a coating material 8 having water permeability such as woven or nonwoven fabric or mesh fabric, and both end portions of the coating 8 are adhered to the waterproof wall material 1.

As described above, as the tunnel T having a fixed length is excavated, the water blocking wall material 1 thus formed is excavated.
If the length of the excavated tunnel T is long and the excavated tunnel T is long, the same applies to the front end face of the arched water-stop wall material 1 at a position at a certain distance from the inner wall surface t of the tunnel. Then, the water blocking wall material 1 is assembled in an arch shape.

Specifically, this assembling work will be described first.
As shown in FIG. 3, lock bolts 9, 9 are driven perpendicularly to the inner wall surface t of the tunnel at the lower end portions of both side walls of the tunnel T, and an appropriate length on the base end side is made to protrude into the tunnel. Next, the water blocking wall material 1 is opposed to the lower end of the inner wall surface t of the tunnel, and a through hole 3 penetrating the end thereof is inserted through the base end of the lock bolt 9 at a constant interval from the inner wall surface t of the tunnel. As shown in FIG. 4, as shown in FIG. 4, a nut 10 having a hemispherical surface is screwed into a bolt end protruding from the inner surface of the water blocking wall material 1. The water blocking wall material 1 is fixed by being locked to the outer surface of the material 1. In these water blocking wall materials 1 fixed to the lowermost portion of the inner wall surface t of the tunnel, a drain pipe 19 is connected to and communicated with the lower end of the water collecting pipe 7 provided on the outer surface, so that it can be assembled during assembly. The drain pipe 19 is led into the tunnel through a guide hole 20 provided at the lower end of the water blocking wall material 1 and communicating with the inside and outside.

After the lower water blocking wall materials 1 and 1 are fixed by the lock bolts 9 and the nuts 10 so as to face the lower end portions on both sides of the inner wall surface t of the tunnel as described above, The middle water blocking wall materials 1 and 1 are joined together and connected by a joint member 11. The joint member 11 is a plate made of a steel plate or a hard synthetic resin, and is formed in a flat drum shape as shown in FIG.
Has a shape that can be fitted into the dovetail-shaped cutout groove 4 provided at the inner surface side end portion.

In order to connect the upper and lower water blocking wall materials 1 and 1 with the joint member 11, the middle water blocking wall material 1 is attached to the upper end surface of the lower water blocking wall material 1 fixed to the lock bolt 9 via the nut 10. To the lower end surface. At this time, the notch grooves 4, 4 provided on the inner surface side of the opposite ends of the water blocking wall materials 1, 1 are aligned, and one half of the joint member 11 is aligned with the cutout groove 4 of one of the water blocking wall materials 1. Is fitted with the other half of the joint member 11 to the notch groove 4 of the other water blocking wall material 1 and struck with a mallet or the like to thereby form the two notch grooves 4,
The joint member 11 is fitted over four spaces. When joining the water blocking wall materials 1 and 1, the opposite ends of the water collecting pipes 7 and 7 arranged on the outer surface side are connected and communicated by fitting or the like.

In this way, the water blocking wall material 1 serving as the middle step wall material is joined and connected to the lower water stopping wall material 1, and at the upper end portion of the inner wall surface t of the tunnel, the water blocking wall material 1 between the adjacent middle step water blocking walls 1 and 1 is connected. The upper water blocking wall material 1 is inserted into the cutout grooves 4, 4, and the joint member 11 is connected between the cutout grooves 4, 4. In this way, as shown in FIG. 5, a plurality of water blocking wall materials 1 are assembled in an arch shape along the tunnel inner wall surface t, and the space between the tunnel inner wall surface t and the arched water blocking wall material 1 is formed. Void
Twelve wives, that is, voids 12 that open in the tunnel length direction
Is closed with a camber, a rubber tube, or the like, and a primary lining concrete 13 is poured into the gap 12 from the inside of the tunnel through the through hole 3 and cast.

As the concrete 13 for the primary lining, water, cement, fine aggregate, coarse aggregate and other admixtures for imparting fluidity are mixed and kneaded. As shown in the figure, a concrete agitator 14 installed in the tunnel T is fed through a concrete pouring pump 15 into a concrete pouring hose 16 which is connected to and communicates with the through hole 3 of the water blocking wall material 1 via a concrete pouring pump 15. It is to be cast in the gap 12. The through-hole 3 not used for pouring concrete is closed by a plug (not shown).

The concrete 13 is poured into the cavity 12 from the through hole 3 of the lower wall 1 so that the concrete 13 is sequentially filled upward from both sides of the bottom of the cavity 12. Into the through hole 3 through a concrete injection hose 16. At that time, since the water blocking wall material 1 is a transparent material, the concrete casting situation can be visually checked, and construction and quality control can be performed with high accuracy. In addition, since a concave portion having a rib portion 1a is formed on the outer surface of the water blocking wall material 1, adhesion and integration with concrete are reliably performed.

In this way, the primary lining concrete 13 is formed in the arch-shaped void portion 12, and after the concrete 13 has hardened, as shown in FIG.
The rock bolt 9 is radially driven into the ground. As shown in FIG. 1, this driving method uses a plug in which a base end of a lock bolt 9 is held by an elevating chuck 28 of a lock bolt driving machine 27 provided in a tunnel T and a through hole 3 is closed. Then, the lifting chuck 28 is raised, the tip of the lock bolt 9 is inserted into the through hole 3, and the chuck 28 is pushed while rotating to drive the lock bolt 9 into the primary lining concrete 13. is there.

After the predetermined number of lock bolts 9 have been driven in, the nuts 10 are screwed and fixed to the base ends of the lock bolts 9 protruding from the inner surface of the water blocking wall material 1. The base end of the lock bolt 9 protruding from the hemispherical head is cut to smooth the inner surface of the water blocking wall material 1. This operation can be performed in parallel with the excavation of the next fixed length tunnel T.

After the formation of the primary lining concrete 13 having the predetermined length on the inner wall surface t of the tunnel, the tunnel portion having the predetermined length is excavated in the same manner as described above, and the water blocking wall is provided on the excavated inner wall surface t of the tunnel. Work to assemble the material 1 into an arch shape,
The operation of placing concrete in the gap 12 between the arch-shaped water blocking wall material 1 and the inner wall surface t and the operation of driving the lock bolt 9 are sequentially performed to form the primary lining concrete 13 already formed. Forming a continuous primary lining concrete 13,
The primary lining concrete 13 is continuously formed on the inner wall surface t of the tunnel by repeating the above operation.

At this time, the arch-shaped water blocking wall material 1 of the primary lining concrete portion formed earlier and the arch-shaped water blocking wall material 1 of the primary lining concrete portion formed next are in the circumferential direction of the tunnel T. In contrast, as shown in FIG. 9, the joining surfaces of the water blocking wall materials 1 and 1 in the tunnel length direction are shifted in the circumferential direction (in the figure, an intermediate portion of the water stopping wall material 1 in the tunnel circumferential length). (The joining surfaces of the water blocking wall materials 1 and 1 adjacent to the front and rear of the water blocking wall material 1 are positioned). Therefore, the water blocking wall material 1 'arranged at the lower end of the inner wall surface t of the tunnel is formed to have a shorter (half in the figure) length than the water blocking wall material 1, The wall material 1 and the tunnel material are alternately arranged in the length direction of the tunnel.

Water-stop wall material 1 joined in the length direction of the tunnel,
The notches 4 and 4 are also provided at the opposite ends thereof.
This is performed by fitting the joint member 11 therebetween. The number and length of the rock bolts 9 to be driven, the radial arrangement state, the thickness of the lining concrete 13 and the like are appropriately set according to the soil conditions of the ground, the soil pressure, the ground pressure such as the groundwater pressure, and the like.

Next, a mold (centre) is formed along the arch-shaped water blocking wall material 1 at a predetermined interval from the arch-shaped water blocking wall material 1 integrally fixed to the inner peripheral surface of the primary lining concrete 13. ) Is assembled, and a secondary lining concrete 18 is poured between the formwork (not shown) and the arch-shaped waterproof wall material 1. After the secondary lining concrete 18 has hardened, the formwork is dismantled and removed. This 2
The next lining concrete 18 is formed in a state where the inner surface of the water blocking wall material 1 is formed into a smooth surface and thus the edge is cut without being fixed to the water blocking wall material 1. Accordingly, cracks in the concrete 18 are prevented without transmitting the behavior of the ground to the secondary lining concrete 18. The secondary lining concrete 18 does not always need to be provided.

In the tunnel lining thus formed, a water collecting pipe 7 communicating with the outer surface of the buried arch-shaped water blocking wall material 1 in the circumferential direction is provided. The water can be taken into the water collecting pipe 7 and discharged to a gutter or the like in a tunnel through a drain pipe 19 provided in the lowermost water-stop wall material 1. Therefore, the water-stop wall material 1 and the secondary lining The groundwater pressure applied to the concrete 18 can be reduced.

In the above embodiment, first, a plurality of water-blocking wall members 1 are assembled in an arch shape, and then concrete is formed in a gap between the inner wall surface t of the tunnel and the arch-shaped water-blocking wall member 1. Although 13 is cast, concrete 23 may be cast in parallel with the assembly of the water blocking wall material 1. At this time, a concrete which is hardened in a short time by adding a quick-setting agent is used as the concrete 23.

FIGS. 12 to 16 show the lining method.
First, on both sides of the lower end of the inner wall surface t of the tunnel, the lock bolts are provided at intervals equal to the distance between the through holes 3, 3 formed at predetermined intervals in the arc length direction drilled in the water blocking wall material 1. After driving the lock bolts 9 and 9 into the ground (FIG. 12), the through holes 3 and 3 of the water blocking wall material 1 are inserted through the base ends of the lock bolts 9 and 9 protruding from the inner wall surface t of the tunnel. Screw 10 and fix.

Thereafter, the end portion of the water blocking wall material 1 is closed with a camber, a rubber tube or the like, and the camber and the like and the front end face of the concrete already cast and the inner wall surface t of the tunnel are formed in the same manner as in the above embodiment. Concrete 23 is poured into a gap 22 surrounded by the inner surface of the water blocking wall material 1. in this case,
In the above embodiment, the through hole 3 provided in the water blocking wall material 1
In this embodiment, since the gap 22 between the inner wall surface t of the tunnel and the water blocking wall material 1 is open upward, the concrete injection hose 16 faces the opening. It can be cast while not being used. It should be noted that a quick-setting agent is added to and mixed with the concrete 23 when the concrete 23 is supplied to the injection hose 16.

After placing and hardening the concrete 23 into the gap portion 22, the lower end surfaces of the next middle-stage water blocking wall materials 1 and 1 are joined and connected to the upper end surfaces of the lower water blocking wall materials 1 and 1 on both sides. . At this time, the water collecting pipes 7, 7 attached to the outer surfaces of the lower and middle water blocking wall materials 1, 1 are connected and communicated in the same manner as described above. Similarly, the water blocking wall materials 1 and 1 are connected to each other by fitting the joint member 11 into the notch grooves 4 and 4 facing each other as described above, and the middle water blocking wall materials 1 and 1 are inserted through the through holes 3. The lock bolt 9 is driven into the ground, and the nut 10 is screwed into the lock bolt 9 for fixing.

Furthermore, after closing the wives of the middle water blocking wall materials 1 and 1 with a camber, a rubber tube or the like, concrete 23 is poured and hardened (FIG. 14). This casting may be performed using the through hole 3 or may be performed from the upper end of the opening between the middle water blocking wall materials 1 and 1 and the inner wall surface t of the tunnel. Similarly, the upper water-blocking wall material 1 is connected between the upper end surfaces of the middle water-blocking wall materials 1 and 1, and after closing its wives, concrete 23 is cast and the arch as shown in FIG. To form a lining.

As described above, the concrete 23 is poured and hardened each time while the water-blocking wall material 1 is sequentially assembled from the lower tier to the upper tier, so that the upper tier is still hardened by the hardened concrete 23 sequentially from the lower tier. The weight of the unconcreted cast concrete is supported and does not impinge on the water blocking wall material 1 on the lower tier side. Therefore, each of the water blocking wall materials 1 supports all the concrete poured into the arch-shaped void portion 22. There is no need for any strength to perform the operation, and no problem occurs even if the rigidity of the water blocking wall material 1 is small.

After the lining is applied to the inner wall surface t of the tunnel in this manner, a formwork is assembled inside the lining as required,
The secondary lining concrete 18 is formed by placing concrete between the arched water blocking wall material of the lining and the formwork. The water collecting pipes 7 attached to the outer surface of the water blocking wall material 1 are connected and communicated with each other in the circumferential direction of the tunnel, and the lower end is opened into the tunnel through the drain pipe 19 as described above.

[0039]

As described above, according to the tunnel lining method of the present invention, the form of the form along the inner wall surface of the tunnel is formed at a position spaced from the inner wall surface of the tunnel by the excavation of the tunnel of a predetermined length. While assembling the plurality of water blocking wall materials having the formed rigidity in an arch shape in the tunnel circumferential direction,
Primary concrete is cast in the gap between the inner wall surface of the tunnel and the water blocking wall material, so concrete is not sprayed, so lining is performed in a favorable working environment without generating dust. Of course, the work can be performed, and the water blocking wall material is formed into a rigid formwork, so that it is easy to handle and the assembly work can be easily and accurately performed without skill. Since the lining is formed by integrating the water blocking wall material with the cast concrete, a lining that can reliably prevent groundwater from entering the tunnel without damaging compared to conventional sheeting is obtained. It is something that can be done.

Further, the arch action of the water-stop wall material assembled in an arch shape can prevent loosening of the ground, and suppress and disperse stress concentration in the ground near the space inside the tunnel to stabilize the tunnel space. Can be done. In addition, by providing a secondary lining by casting concrete on the inner surface of the tunnel as a primary lining as a primary lining, a strong tunnel lining having a predetermined thickness and a more excellent waterproof property can be efficiently formed. is there.

Further, as described above water stopping wall materials are set forth in claim 2, a transparent hard synthetic resin having a predetermined thickness which is curved arcuately and tunnel circumferential direction has a constant width in the tunnel longitudinal direction Since it is made of material, it is possible to visually observe the casting situation from inside the tunnel when casting concrete, and therefore, it is easy to control the construction of the tunnel lining, and it is possible to obtain accurate lining. , And also claims
As described in 3, since the recess is formed at a plurality of locations on the outer surface of the water blocking wall material, the primary lining concrete and the water blocking wall material can be firmly adhered and integrated by the recess. At the same time, since the inner surface of the water blocking wall material is formed as a smooth surface, the water blocking wall material and the secondary lining concrete are cut off without being integrated, and the vibration during the occurrence of an earthquake is almost completely reduced to the secondary lining concrete. It does not transmit and can prevent cracking.

Furthermore, since the waterproof packing is attached to the four end surfaces of the waterproof wall material, the joint between the adjacent waterproof wall materials can be completely stopped by the close contact between the packings. Since the cutout grooves for connection are provided at the opposite end of the inner surface of the waterstop wall material, the waterstop wall materials can be easily and accurately assembled by aligning the cutout grooves. In addition, the water blocking wall members can be easily connected to each other by fitting the joint members into the opposed notched grooves communicating with each other. In addition, the water blocking wall material is provided with through holes for concrete injection and lock bolt driving penetrating into the inner and outer surfaces, so that concrete can be used between the inner wall surface of the tunnel and the water blocking wall material by using these through holes. After the casting and hardening, a strong lining can be built by driving a lock bolt.

According to the fourth aspect of the present invention,
A water collecting pipe long in the circumferential direction of the tunnel is attached to an outer surface of the water blocking wall material, and a drain pipe communicating from the water collecting pipe to the inside of the tunnel is provided at a lower end of the water blocking wall material arranged at the lowermost portion in the tunnel. The groundwater entering the concrete lining can be collected by the water collection pipes, and the groundwater is discharged from the water collection pipes into the tunnel through the drainage pipes provided in the bottom water blocking wall material. The present invention can reduce the underground water pressure applied to the water wall material and the secondary lining concrete, and can eliminate the occurrence of cracks due to the water pressure.

[Brief description of the drawings]

FIG. 1 is a simplified longitudinal side view showing a lining construction state,

FIG. 2 is a perspective view of a water blocking wall material,

FIG. 3 is a simplified vertical sectional front view showing a state where a rock bolt is driven into the ground;

FIG. 4 is a simplified longitudinal front view showing a state in which a water blocking wall material is fixed to the lock bolt.

FIG. 5 is a simplified longitudinal sectional front view of a state where the water blocking wall material is assembled in an arch shape,

FIG. 6 is a simplified vertical sectional front view showing a state in which concrete is poured into an arch-shaped void;

FIG. 7 is a simplified vertical sectional front view of the state where a lock bolt is driven.

FIG. 8 is a simplified vertical sectional front view showing a state in which secondary lining concrete is applied.

FIG. 9 is a development view of the water blocking wall material connected in an arch shape,

FIG. 10 is a partially enlarged longitudinal sectional front view of the primary lining concrete,

FIG. 11 is an enlarged vertical sectional front view showing a state where a lock bolt is driven through a through hole of a water blocking wall material.

FIG. 12 is a simplified longitudinal front view for explaining another method of the tunnel lining method of the present invention,

FIG. 13 is a simplified vertical sectional front view showing a state where concrete has been poured into a lower stage;

FIG. 14 is a simplified vertical sectional front view of a state where concrete has been poured into the middle stage.

FIG. 15 is a simplified vertical sectional front view showing a state where concrete has been poured into the upper stage;

FIG. 16 is a simplified vertical sectional front view showing a state where secondary lining concrete is applied.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Water stop wall material 2 Depression 3 Through hole 4 Notch groove 6 Water stop packing 7 Water collecting pipe 9 Lock bolt 11 Joint member 12 Void 13 Primary lining concrete 18 Secondary lining concrete 19 Drainage pipe T Tunnel t Tunnel inner wall surface

Claims (4)

(57) [Claims] 1. A plurality of rigid water-blocking wall members formed in a form along a tunnel inner wall surface and having a rigid shape are provided at a position spaced from the inner wall surface of the tunnel by a predetermined length of tunnel excavation. A tunnel lining method comprising: assembling an arch in the direction; and placing primary concrete in a gap between an inner peripheral wall surface of a tunnel and a water blocking wall material. In positions exist a certain distance from the tunnel inner wall surface in accordance with the tunnel excavation 2. A predetermined length, the tunnel length
With a certain width in the direction and curved in an arc in the circumferential direction of the tunnel.
Made of transparent hard synthetic resin material with a certain thickness ,
Assemble a plurality of rigid water-blocking wall materials formed into a form along the inner wall surface of the tunnel in the circumferential direction of the tunnel, and pour primary concrete into the gap between the inner wall surface of the tunnel and the water-blocking wall material. lining method of the tunnel, characterized in that the set. 3. The water-blocking wall material has a concave portion formed in several places on its outer surface and a smooth inner surface, and
Waterproof packing is installed on the four end faces, and through holes for concrete injection and lock bolt driving penetrating into the inner and outer surfaces are drilled in place, and cutout grooves for connecting waterstop wall materials are formed on the four inner faces. The tunnel lining method according to claim 1, wherein the tunnel lining is provided. 4. A water collecting pipe long in the circumferential direction of the tunnel is attached to an outer surface of the water blocking wall material, and a lower end of the water blocking wall material arranged at the lowermost portion in the tunnel communicates from the water collecting pipe into the tunnel. 3. A tunnel lining method according to claim 1, wherein a drain pipe is provided.