JPH08158796A - Lining member of tunnel - Google Patents

Abstract

PURPOSE: To make it possible to fix a lining firmly to a bedrock even in poor subsoil and to enable reaction force also to be surely borne on the backward lining when a shield machine main body is moved forward. CONSTITUTION: The end of a cylindrical cloth is folded, and a short cylindrical cloth with the approximately same diameter as that of the cylindrical cloth is fitted thereto from the outside of the folded section to form a bag body 8 with the closed ends. The bag body 8 is provided to the outside of a segment 7, cement milk or mortar is injected from an injection port 9 connected to the inside of the bag body 8, and the bag body is expanded and is pressed to a bedrock 5 with pressure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lining member on the inner surface of a tunnel when the tunnel is formed by a shield method or the like.

[0002]

2. Description of the Related Art A shield method has been widely known as a method for forming a tunnel in the ground.

In the shield construction method, as shown in FIG. 1, the shield machine body 1 is pushed into the ground by a jack 2 for propulsion, and then a plurality of lining segments 3 are assembled inside the tail portion of the shield machine. It is common to fill the overburden space 4 between the lining segment 3 and the ground 5 with a backfill material such as concrete.

The lining segment 3 is, as shown in FIG.
A large number (6 in FIG. 2) of A-shaped 3a forming the bottom, both sides and near the ceiling of the tunnel, two B-shaped 3b forming both sides of the ceiling, and a C-shaped 3 forming the top of the ceiling.
c, which automatically assembles these lining segments 3 at the rear of the shield machine body 1 to form a generally cylindrical tunnel.

[0005]

However, in this method, when the ground is soft, the lining segment 3 is used.
Loosening is likely to occur in the ground before the backfill material is cured after assembling. The reaction force for propelling the shield machine body 1 is supported by the rear lining segment 3, but if the ground 5 around the lining segment 3 is loose, the shield machine body 1 It is difficult to support the reaction force of.

Further, a tubular bag is attached to the outside of the lining segment 3, and a backfill material is filled into the bag to inflate it to prevent the ground 5 from loosening and to fill the overditch space 4. A method is also possible.

However, generally, in the shield construction method, the work such as movement, assembly and installation of a plurality of lining segments 3 is automatically performed, so that during the automation process, along the outside of the lining segment 3. It is difficult to add the step of installing a ring-shaped bag.

On the outside of each lining segment 3,
It may be possible to incorporate it into the automation process by individually attaching the pre-divided bags, but the end of each bag does not become an obstacle to assemble the lining segment 3 and press-fits the backfill material. Adjacent bags are butted against each other while resisting the pressure when the lining segment 3 and the ground 5
It is necessary that the space between and is completely backfilled.

The present invention has been made in view of such circumstances, and a bag body is individually attached to the outside of the lining segment 3 to firmly fix the lining segment 3 to the ground 5. The purpose of the present invention is to provide a lining member that can be used.

[0010]

According to the present invention, the end of the tubular woven fabric is folded back, and the tubular woven fabric is fitted into the tubular woven fabric from the outside of the folded back portion and the tubular woven fabric having a diameter substantially the same as that of the tubular woven fabric. A bag body whose both ends are closed, the bag body is arranged outside the segment, and an injection port communicating with the bag body is formed.

In the present invention, it is preferable that an airtight tube whose both ends are closed is inserted into the tubular woven fabric, and the inlet is connected to the airtight tube.

Further, in the present invention, it is preferable that the short tubular woven fabric is bonded to the main body portion and the folded portion of the tubular woven fabric.

Further, in the present invention, it is preferable that a flexible plate body having a width substantially equal to the folding width of the tubular fabric is inserted inside the folded portion of the bag body.

Further, it is preferable that the end portion of the tubular woven fabric to be folded back has a diameter smaller than that of the main body of the tubular woven fabric.

The present invention will be described below with reference to the drawings. FIG.
Shows a lining member 6 of the present invention, and 7 is a segment.

As with the lining segment 3 shown in FIG. 2, the segment 7 is curved in a substantially arc shape so that a plurality of segments 7 are combined to form a tunnel lining having a substantially circular cross section. There is.

In this drawing, the segment 7 includes a base plate 7a forming a part of a substantially cylindrical surface, and a plurality of reinforcing plates 7b and 7c extending inward and outward from the curve of the base plate 7a along the bending direction. However, the segment 7 is not limited to the one having the structure shown in FIG. 3, and the segment generally used as the lining segment 3 can be used as it is.

Reference numeral 8 denotes a bag body attached between the reinforcing plates 7c of the segment 7 along the outside of the curve of the substrate 7a, and an injection port 9 penetrating the substrate 7a and communicating with the inside of the bag body 8 is provided. Has been formed.

FIG. 4 shows one end of the bag body 8 according to the present invention, and 10 is a tubular woven fabric. The tubular woven fabric 10 has a diameter larger than the maximum distance between the segment 7 and the ground 5, and when the bag body 8 is inflated in a state in which the lining member 6 is assembled, the bag body 8 has the segment 7 It should be possible to press against the natural ground 5.

Both ends of the tubular fabric 10 are folded back to one side so as to be folded over the main body portion 11 in a state where the tubular fabric 10 is flatly folded, and folded portions 12 are formed.

Numeral 13 is a short tubular woven fabric having substantially the same diameter and the same strength as the tubular woven fabric 10. The folded portion 12 and the main body portion 1 overlapping the folded portion 12
1, the short tubular fabric 13 is fitted on the outer side. Further, it is preferable that the short tubular fabric 13 is lightly fixed to the folded-back portion 12 and the main body portion 11 at several points so as not to be displaced.

Inside the main body portion 11 of the tubular fabric 10, a flexible airtight tube 1 made of rubber or the like having both ends closed is used.
4 has been inserted. The injection port 9 penetrates the tubular fabric 10 and is connected to the airtight tube 14.

[0023]

In the present invention, the bag body 8 is attached to the outside of the segment 7 in a flatly folded state. When the segment 7 has a reinforcing plate 7c on the outer side of the curve as shown in FIG. 3, it is preferable to fold the bag body 8 further and store it so as not to project from the outer edge of the reinforcing plate 7c. .

Thus, in the shield construction method or the like, after the shield machine body 1 is advanced to advance excavation as shown in FIG. 1, a plurality of lining members 6 of the present invention are assembled and covered at the tail portion of the shield machine. Form the work.

At this time, since the lining member 6 has the bag body 8 attached to the outer side of the segment 7, it can be handled in exactly the same manner as the lining segment 3 in the conventional construction method, and the automatic lining is performed. Can be incorporated into the assembly process.

After assembling the lining member 6, a backfill material such as concrete is press-fitted into the airtight tube 14 in the bag body 8 through the injection port 9. Due to the pressure of the backfill material, the bag body 8 swells, and as shown in FIG. 3, the bag body 8 is strongly pressed against the segment 7 and the ground 5 to fill the overditch space 4.

At this time, as shown in FIG. 4B, the bag 8
At the end portion, the folded-back portion 12 is strongly pinched between the body portion 11 and the short tubular fabric 13 due to the bulging of the body portion 11 of the tubular fabric 10, and does not come off.

The short tubular fabric 13 is lightly fixed to the main body portion 11 and the folded portion 12 by adhering the folded tubular portion 13 to the main body portion 11 and the short tubular fabric 13 so that the folded portion 12 is more It is firmly fixed and will not come out.

When the bag body 8 is inflated, the end of the bag body 8 is inflated into a substantially hemispherical shape as shown in FIG. 4 (b). The ends of the bag body 8 of the work member 6 are abutted against each other and pressed against each other. Therefore, the terminals of the bag body 8 reinforce each other to increase the pressure resistance of the bag body 8 and seal the lining to prevent intrusion of groundwater from the ground 5 into the tunnel.

[0030]

Therefore, according to the present invention, the backfill material is filled in the bag body 8, and the bag body 8 is filled with the segment 7 and the ground 5.
Since the lining member 6 is fixed to the ground 5 by being pressed against
Even if the ground 5 is soft, the backfill material does not enter the soft rock and loosen it.

Therefore, even on soft ground, the lining can be firmly fixed to the ground 5, and the reaction force for propelling the shield machine body 1 is also mediated by the assembled lining member 6. It can be firmly supported by 5.

Further, the bag body 8 of the present invention has a simple structure and can withstand the pressure of the backfill material inside, and
Since the end portions are formed in a hemispherical shape when the bag body 8 is inflated, the structures of the ends of the adjacent bag bodies 8 do not interfere with each other, and they can be abutted against each other and effectively sealed.

In the above description, the present invention has been described as a lining member in the shield construction method, but the present invention is not limited to the shield construction method, and other construction methods such as arch-type support work. Can also be applied to the formation of a tunnel using. In this case, the steel support member divided into a plurality of pieces is used as the segment 7 in the present invention, and the bag body 8 is arranged on the outer side thereof, whereby the lining member 6 of the present invention can be obtained.

[0034]

FIG. 5 shows an embodiment of the present invention. In this embodiment, inside the folded portion 12 of the tubular woven fabric 10, the width of which is approximately equal to the folding width of the tubular woven fabric 10,
A flexible plate body 15 made of a flexible material such as metal or plastic is inserted.

In this embodiment, since the flexible plate 15 is inserted in the folded portion 12, the short tubular fabric 13 is formed.
The shape of the folded-back portion 12 is not disturbed on the inside of, and the shape of the end portion of the bag body 8 is adjusted.

Further, when the backfill material is press-fitted into the airtight tube 14, the flexible plate 15 is bent in the circumferential direction to bend, so that the bag body 8 can expand and the flexible plate body can be expanded. When 15 is bent in the circumferential direction, it cannot be bent in the axial direction.
Since it is not possible to form the hemispherical portion of the end, the folded-back portion 12 does not come off from the short tubular fabric 13.

FIG. 6 shows another embodiment of the present invention. In this embodiment, a small diameter portion 16 having a diameter smaller than that of the main body portion 11 is formed at the end portion of the tubular woven fabric 10, and the small diameter portion 16 is folded back to form a folded portion 12.

In this embodiment, when the bag body 8 is inflated by the backfill material, the end of the bag body 8 tends to have a substantially hemispherical shape, and the sealing effect by the abutting of the adjacent bag bodies 8 is improved. The pressure resistance of the tubular woven fabric 10 also increases.

In the above description, the airtight tube 14 is inserted into the tubular fabric 10 to form the bag body 8. However, when an appropriate cement milk or mortar is used as the backfill material, The airtight tube 14 can be omitted. In this case, only the water in the backfill material exudes from the tubular fabric 10 and the bag 8 can be inflated with the high-concentration backfill material.

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing a state in which the shield construction method is carried out.

FIG. 2 is a conceptual diagram showing an assembled state of a lining segment in the shield construction method.

FIG. 3 shows a lining member of the present invention,
(A) shows a cross-sectional view and (b) shows a central vertical cross-sectional view.

FIG. 4 is a central vertical cross-sectional view showing a terminal portion of the bag body according to the present invention, in which (a) is a folded state and (b) is an inflated state.

5A and 5B show a terminal portion of a bag body according to an embodiment of the present invention, in which FIG. 5A is a central longitudinal sectional view in a folded state, and FIG. 5B is a transverse sectional view in an inflated state. It is a figure.

FIG. 6 shows another embodiment of the present invention,
(A) is a side view which shows the terminal part of a tubular fabric, (b)
[Fig. 3] is a side view of a terminal portion of a bag body.

[Explanation of symbols]

 6 Lining member 7 Segment 8 Bag 9 Pouring port 10 Cylindrical woven fabric 11 Main body part 12 Folding part 13 Short tubular woven fabric 14 Airtight tube 15 Flexible plate 16 Small diameter part

Claims (5)

[Claims] 1. An end of a tubular woven fabric (10) is folded back, and a tubular woven fabric (10) having a diameter substantially the same as that of the tubular woven fabric (10) is provided from the outside of the folded-back portion (12). 13) is fitted to form a bag body (8) with both ends closed, the bag body (8) is arranged outside the segment (7), and an injection port () that communicates with the bag body (8) is formed. 9) The lining member for the tunnel, characterized in that 2. The tubular fabric (10) is inserted with an airtight tube (14) having both ends closed, and the injection port (9) is inserted.
A lining member for a tunnel according to claim 1, characterized in that it communicates with an airtight tube (14). 3. The short tubular fabric (13) is adhered to the body part (11) and the folded-back part (12) of the tubular fabric (10), according to claim 1 or Two
Tunnel lining member described in 4. The folded portion (1) of the bag body (8)
The flexible plate body (15) having a width substantially equal to the folding width of the tubular fabric (10) is inserted inside 2), and the flexible plate body (15) according to claim 1, 2 or 3 is characterized. Tunnel lining material 5. The tubular fabric (10), wherein the end portion to be folded back has a diameter smaller than that of the main body portion (11) of the tubular fabric (10). Four
Tunnel lining member described in