CN204877504U - Shield structure starts and receives entrance to a cave seal structure - Google Patents

Abstract

The utility model provides a shield structure starts and receives entrance to a cave seal structure, its characterized in that includes annular clamp plate, annular connecting plate and annular gasbag, is equipped with the annular connecting plate rather than a body structure in the periphery of annular gasbag, is equipped with rather than complex annular clamp plate in one side of this annular connecting plate, be equipped with on this annular connecting plate and annular clamp plate along a plurality of mounting holes that are used for passing the long bolt of circumference equipartition. The utility model discloses beneficial effect is: after the shield constructed entrance to a cave rubber wipes gas distribution bag installation, it kept certain pressure to pressurization messenger in the gasbag, can obviously improve the shield and construct the sealed effect in the entrance to a cave, had greatly improved the shield and had constructed the security of starting.

Description

A Sealing Structure of Shield Starting and Receiving Tunnels

technical field

The utility model relates to a sealing structure for a shield starting and receiving hole, which can be extended to the application of the shield passing through air ducts, inspection wells and subway stations.

Background technique

At present, shield tunneling is the most widely used tunneling method at home and abroad. The construction of shield tunneling is generally divided into three stages, namely, shield initiation, normal tunneling, and reception.

In the case of a shield tunnel with a deep buried depth, there is usually abundant groundwater, and attention must be paid to the sealing of the shield tunnel’s starting and receiving openings. At present, solid rubber cord panels are used for sealing in projects, but the sealing effect is not very significant , especially when the shield is received, because the bending direction of the rubber ply plate is consistent with the direction of shield tunneling, and is consistent with the flow direction of water, sand and other surges, the sealing effect is not ideal, and water leakage, sand and mortar often occur , There may even be a large amount of soil loss and landslides at the entrance of the cave, which poses a great safety hazard. For this reason, more effective sealing measures must be adopted at the shield tunnel entrance to minimize and avoid water gushing and sand gushing at the tunnel opening during departure and reception.

Contents of the invention

The purpose of the utility model is to provide a sealing structure for the starting and receiving holes of the shield to solve the problem of poor sealing effect of the existing shield hole sealing device.

The technical solution of the present utility model is: a sealing structure for shield starting and receiving holes, which is characterized in that it includes an annular pressure plate, an annular connecting plate and an annular air bag, and an annular connecting plate with an integral structure is provided on the outer periphery of the annular air bag, An annular pressing plate matched with the annular connecting plate is arranged on one side of the annular connecting plate; a plurality of mounting holes uniformly distributed along the circumference for passing through the long screw rods are arranged on the annular connecting plate and the annular pressing plate.

An annular backing plate is provided on the other side of the annular connecting plate, and a through hole corresponding to the installation hole is arranged on the annular backing plate.

An annular steel collar is provided between the annular connecting plate and the annular backing plate, and a through hole corresponding to the mounting hole is provided on the annular steel collar.

The radial width of the annular connecting plate is 300-500mm, and the thickness is 10-20mm; the diameter of the annular airbag is 150-300mm, and the thickness is 5-10mm; the installation of the annular connecting plate and the annular pressure plate The hole spacing is 50~100mm.

The annular pressing plate is made of steel with a thickness of 10-15 mm, and the radial width of the annular pressing plate is the same as that of the annular connecting plate.

The annular connecting plate and the annular air bag are made of rubber cord.

The beneficial effects of the invention are: after the rubber cord airbag at the opening of the shield machine is installed, pressurizing the airbag to maintain a certain pressure can obviously improve the sealing effect of the opening of the shield machine, and greatly improve the safety of the start of the shield machine.

Description of drawings

Fig. 1 is an axial sectional view of an embodiment of the utility model (without steel collar);

Fig. 2 is an axial sectional view of another embodiment of the present utility model (there is a steel collar);

Fig. 3 is a schematic diagram of the structure of the utility model when it is installed in the shield tunnel (there is no steel collar at the hole);

Fig. 4 is a schematic diagram of the structure of the utility model when it is installed in the shield (the steel collar is added to the hole);

Fig. 5 is a schematic diagram of the structure of the utility model when it is installed in the shield tunnel (there is no steel collar at the hole);

Fig. 6 is a schematic diagram of the structure of the utility model when it is installed in the shield tunnel (adding a steel collar to the hole).

Detailed ways

Referring to Fig. 1 and Fig. 2, a sealing structure of a shield launching and receiving hole of the utility model is characterized in that it includes an annular pressure plate 13, an annular connecting plate 14 and an annular air bag 15, and an integral body is provided on the outer periphery of the annular air bag 15. The annular connecting plate 14 of the structure is provided with an annular pressing plate 13 matched therewith on one side of the annular connecting plate 14 . On this annular connection plate 14 and the annular pressure plate 13, be provided with a plurality of installation holes uniformly distributed along the circumference for passing through the long screw rod 12, pass the installation hole with the long screw rod 12 during use, use the nut 16 and the washer 8 to connect the ring The connecting plate 14 and the annular pressure plate 13 are fixed at the starting and receiving holes of the shield (see the application examples below for details).

On the other side of the annular connecting plate 14, there is an annular backing plate 17 (see FIG. 1), on which there are mounting holes corresponding to the annular connecting plate 14 and the annular pressure plate 13 through holes.

According to needs, an annular steel collar 6 can be provided between the annular connecting plate 14 and the annular backing plate 17, on which the annular steel collar 6 is provided with The mounting holes correspond to the through holes.

The radial width of the annular connecting plate 14 is 300-500 mm, and the thickness is 10-20 mm; the diameter of the annular airbag 15 is 150-300 mm, and the thickness is 5-10 mm; the annular connecting plate 14 and the annular pressing plate The spacing of the mounting holes on 13 is 50~100mm.

The annular pressing plate 13 is made of steel with a thickness of 10-15 mm, and the radial width of the annular pressing plate 13 is the same as that of the annular connecting plate 14 .

The annular connecting plate 14 and the annular airbag 15 are made of rubber cord (fibrous tendons are arranged in the rubber body, similar to the material of automobile tires).

Illustrate the application method of the present utility model below in conjunction with accompanying drawing:

1. Applied in the starting hole of the shield machine:

(1) The installation structure of the sealing structure without steel collar at the starting hole of the shield:

Referring to Fig. 1 and Fig. 3, the washer 8, the annular pressure plate 13, the annular connecting plate 14, and the backing plate 17 (arranged in sequence from the outside to the side wall 1) are connected and fixed to the side wall 1 through the long screw 12 and the nut 16.

A circle of bolt holes corresponding to the positions of the mounting holes on the annular connecting plate 14 is reserved in the side wall 1 .

(2) Sealing structure with steel collar added to the starting hole of the shield:

2 and 4, the washer 8, the annular pressure plate 13, the annular connecting plate 14, the steel collar 6, the backing plate 17 are connected and fixed with the side wall 1 by the long screw rod 12 and the nut 16.

2. The installation structure of the shield receiving hole:

(1) The installation structure of the shield receiving hole without steel collar:

Referring to FIG. 1 and FIG. 5 , the washer 8 , the annular pressure plate 13 , the annular connecting plate 14 , and the backing plate 17 are connected and fixed to the side wall 1 through the long screw rod 12 and the nut 16 .

A circle of bolt holes corresponding to the positions of the mounting holes on the annular connecting plate 14 is reserved in the side wall 1 .

(2) The installation structure of adding a steel collar to the receiving hole of the shield machine:

Referring to Fig. 2 and Fig. 6, the washer 8, the annular pressure plate 13, the annular connecting plate 14, the steel collar 6, the backing plate 17 are connected and fixed with the side wall 1 by the long screw rod 12 and the nut 16.

Mark 2 in Figures 3-6 is the ground, mark 3 is the reinforced concrete wall, mark 4 is the fiber reinforced concrete wall, and mark 5 is the shield machine.

Claims (6)

1. a shield launching and reception hole hermetically-sealed construction, it is characterized in that, comprise annular pressing plate, annular connecting plate and annular air-pocket, be provided with the annular connecting plate with its integrative-structure in the periphery of annular air-pocket, be provided with the annular pressing plate be mated in the side of this annular connecting plate; This annular connecting plate and annular pressing plate are provided with the multiple installing holes for passing long bolt be uniformly distributed along the circumference.

2. shield launching according to claim 1 and reception hole hermetically-sealed construction, is characterized in that, be provided with annular backing plate at the opposite side of described annular connecting plate, this annular backing plate is provided with the through hole corresponding with described installing hole.

3. shield launching according to claim 2 and reception hole hermetically-sealed construction, is characterized in that, between described annular connecting plate and annular backing plate, be provided with annular steel collar, this annular steel collar is provided with the through hole corresponding with described installing hole.

4. shield launching according to claim 1 and reception hole hermetically-sealed construction, it is characterized in that, the radial width of described annular connecting plate is 300 ~ 500mm, and thickness is 10 ~ 20mm; Described annular air-pocket diameter is 150 ~ 300mm, and thickness is 5 ~ 10mm; The spacing of the installing hole on described annular connecting plate and annular pressing plate is 50 ~ 100mm.

5. shield launching according to claim 4 and reception hole hermetically-sealed construction, is characterized in that, described annular pressing plate employing thickness is that the steel of 10 ~ 15mm are made, and the radial width of this annular pressing plate is identical with the radial width of described annular connecting plate.

6. shield launching according to claim 1 and reception hole hermetically-sealed construction, it is characterized in that, described annular connecting plate and annular air-pocket are made up of rubber curtain cloth.