CN216741534U

CN216741534U - Anticorrosive shield tunnel double-layer structure

Info

Publication number: CN216741534U
Application number: CN202122639734.2U
Authority: CN
Inventors: 何一韬; 王凯; 柯小华; 张涛; 陈毅明; 丁文其; 张清照; 罗泽军; 李硕标
Original assignee: Cccc Rail Transit Consultants Co ltd; Tongji University
Current assignee: Cccc Rail Transit Consultants Co ltd; Tongji University
Priority date: 2021-10-29
Filing date: 2021-10-29
Publication date: 2022-06-14
Anticipated expiration: 2031-10-29

Abstract

The utility model discloses an anticorrosive shield tunnel double-layer structure which comprises an inner layer and an outer layer, wherein the outer layer comprises a first shield segment, a second shield segment, a third shield segment and a top block, wherein third splicing steps are arranged at two ends of the third shield segment, second splicing steps are arranged at two ends of the second shield segment, a first splicing step is arranged at one end of the first shield segment, and the third shield segment is arranged at the bottom; according to the utility model, the inner layer structure is formed by pouring the fiber concrete and the reinforcing bars, so that the tunnel has high corrosion resistance and high waterproofness, and the corrosion resistance and the waterproofness of the whole structure are enhanced; the outer structure uses the shield segment as the main stress structure of the whole structure, and the fiber concrete of the inner side structure can be used as the safe storage of the stress of the structure to a certain extent, so that the safety of the structure is further improved.

Description

Anticorrosive shield tunnel double-layer structure

Technical Field

The utility model relates to the technical field of shield tunnels, in particular to an anticorrosive shield tunnel double-layer structure.

Background

The shield method is a fully mechanized construction method in the construction of the subsurface excavation method, and is a mechanized construction method which advances the shield machine in the ground, prevents collapse into the tunnel by the surrounding rocks supported by the shield shell and the duct pieces, excavates the soil body in front of the excavated surface by a cutting device, transports the soil out of the tunnel by an unearthing machine, pushes the soil into the rear part by a jack under pressure, and assembles precast concrete duct pieces to form a tunnel structure.

The existing shield tunnel is generally formed by splicing concrete prefabricated pipe pieces, gaps can inevitably appear due to splicing, if the gaps are not tightly connected, water seepage can be caused in the tunnel, the strength of the tunnel can be influenced, meanwhile, the existing shield tunnel is poor in corrosion resistance, and based on the problems, an anticorrosive shield tunnel double-layer structure is provided.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an anticorrosive shield tunnel double-layer structure to solve the problems in the background technology.

In order to achieve the purpose, the utility model provides the following technical scheme:

an anticorrosive shield tunnel double-layer structure comprises an inner layer and an outer layer, wherein the outer layer comprises first shield segments, second shield segments, third shield segments and a top block, third splicing steps are arranged at two ends of each third shield segment, second splicing steps are arranged at two ends of each second shield segment, first splicing steps are arranged at one ends of the first shield segments, the third shield segments are arranged at the bottom, four second shield segments are spliced on the third splicing steps at two sides of each third shield segment through the second splicing steps respectively, the two first shield segments are spliced at the upper ends of the second shield segments through the first splicing steps respectively, and the top block is arranged between the two first shield segments and used for compressing the first shield segments, the second shield segments and the third shield segments;

the inner layer is formed by pouring fiber concrete in situ, and reinforcing bars are further arranged in the fiber concrete.

As a further scheme of the utility model: the kicking block includes the block, seted up the installation cavity in the block, the equal sliding connection in inside both sides of installation cavity has the expansion piece, one side that the expansion piece is relative is the inclined plane, the installation cavity is located the position between two expansion pieces and is equipped with the toper piece that pushes up, still inlay in the middle of the plywood under the block and be equipped with the nut seat, nut seat female connection has the screw, and the screw upper end is connected with the rotation of toper piece.

As a still further scheme of the utility model: the expansion block and the conical top piece are steel structural members.

As a still further scheme of the utility model: the first shield segment, the second shield segment and the third shield segment are all prefabricated by reinforced concrete.

As a still further scheme of the utility model: the first shield segment, the second shield segment and the third shield segment are consistent in thickness.

As a still further scheme of the utility model: the thickness of the inner layer is consistent with that of the outer layer.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the utility model, the inner layer structure is formed by pouring the fiber concrete and the reinforcing bars, so that the tunnel has high corrosion resistance and high waterproofness, and the corrosion resistance and the waterproofness of the whole structure are enhanced; the outer structure uses the shield segment as the main stress structure of the whole structure, and the fiber concrete of the inner side structure can be used as the safe storage of the stress of the structure to a certain extent, so that the safety of the structure is further improved.

2. According to the utility model, through the arrangement of the screw, the conical ejecting piece, the expansion blocks, the mounting cavity and the nut seat, after the outer layer is spliced, the screw can be rotated by utilizing corresponding equipment, the screw rotates to drive the conical ejecting piece to move upwards, the two expansion blocks are pushed by the conical ejecting piece to expand towards the outer side of the mounting cavity, shield segments are tightly ejected, so that the shield segments can be connected more tightly, gaps among the shield segments are reduced, and the tunnel strength can be effectively improved.

Drawings

Fig. 1 is a schematic structural diagram of an anticorrosive shield tunnel double-layer structure.

Fig. 2 is a schematic diagram of an internal structure of a top block in an anti-corrosion shield tunnel double-layer structure.

Fig. 3 is a schematic structural diagram of a third shield segment in an anticorrosive shield tunnel double-layer structure.

Fig. 4 is a schematic structural diagram of a second shield segment in a corrosion-resistant shield tunnel double-layer structure.

Fig. 5 is a schematic structural diagram of a first shield segment in a corrosion-resistant shield tunnel double-layer structure.

Wherein: 1. a first shield segment; 2. a second shield segment; 3. a third shield segment; 4. fiber concrete; 5. a top block; 51. a block body; 52. a mounting cavity; 53. a conical top member; 54. a nut seat; 55. a screw; 55. an expansion block; 6. a third splicing step; 7. a second splicing step; 8. a first splice step.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, in the embodiment of the present invention, an anticorrosive shield tunnel double-layer structure includes an inner layer and an outer layer, the outer layer includes a first shield segment 1, a second shield segment 2, a third shield segment 3 and a top block 5, third splicing steps 6 are disposed at two ends of the third shield segment 3, second splicing steps 7 are disposed at two ends of the second shield segment 2, a first splicing step 8 is disposed at one end of the first shield segment 1, the third shield segment 3 is disposed at the bottom, four second shield segments 2 are respectively spliced on the third splicing steps 6 at two sides of the third shield segment 3 by the second splicing steps 7, two first shield segments 1 are respectively spliced at the upper end of the second shield segment 2 by the first splicing steps 8, and the top block 5 is disposed between the two first shield segments 1 and is used for aligning the first shield segments 1, The second shield segment 2 and the third shield segment 3 are compressed;

the inner layer is formed by pouring fiber concrete 4 in situ, and reinforcing bars are also arranged in the fiber concrete 4; the first shield segment 1, the second shield segment 2 and the third shield segment 3 are all prefabricated by reinforced concrete; the thicknesses of the first shield segment 1, the second shield segment 2 and the third shield segment 3 are consistent; the thickness of the inner layer is consistent with that of the outer layer; according to the utility model, the inner layer structure is formed by pouring the fiber concrete 4 and the reinforcing bars, so that the tunnel has high corrosion resistance and high waterproofness, and the corrosion resistance and the waterproofness of the whole structure are enhanced; the outer structure uses the shield segment as the main stress structure of the whole structure, and meanwhile, the fiber concrete 4 of the inner side structure can be used as the safe storage of the stress of the structure to a certain extent, so that the safety of the structure is further improved.

The jacking block 5 comprises a block body 51, a mounting cavity 52 is formed in the block body 51, expansion blocks 56 are connected to two sides in the mounting cavity 52 in a sliding mode, one opposite sides of the expansion blocks 56 are inclined planes, a conical jacking piece 53 is arranged between the two expansion blocks 56 in the mounting cavity 52, a nut seat 54 is further embedded in the middle of a lower layer plate of the block body 51, a screw 55 is connected to the nut seat 54 in a threaded mode, and the upper end of the screw 55 is rotatably connected with the conical jacking piece 53; the expansion block 56 and the conical top piece 53 are steel structural members;

according to the utility model, through the arrangement of the screw 55, the conical top piece 53, the expansion block 56, the mounting cavity 52 and the nut seat 54, after the outer layer is spliced, the screw 55 can be rotated by corresponding equipment, the screw 55 rotates to drive the conical top piece 53 to move upwards, the two expansion blocks 56 are pushed by the conical top piece 53 to expand towards the outer side of the mounting cavity 52, shield segments are tightly jacked, so that the connection between the shield segments is tighter, gaps between the shield segments are reduced, and the tunnel strength can be effectively improved.

The working principle of the utility model is as follows: when the shield pipe piece connecting device is in construction, a first shield pipe piece 1, a second shield pipe piece 2, a third shield pipe piece 3 and a top block 5 are spliced to form an outer layer, a screw 55 is rotated by corresponding equipment after splicing is completed, the screw 55 rotates to drive a conical top piece 53 to move upwards, the two expansion blocks 56 are pushed by the conical top piece 53 to expand towards the outer side of an installation cavity 52, the shield pipe pieces are tightly pushed, connection between the shield pipe pieces can be tighter, an inner layer is poured by using fiber concrete 4 and reinforcing bars after rotation is completed, the tunnel has high corrosion resistance and high water resistance, and the corrosion resistance and the water resistance of the whole structure are enhanced.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. Although the present description is described in terms of embodiments, not every embodiment includes only one technical solution, and such description of the embodiments is merely for clarity, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments may be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. The utility model provides an anticorrosive shield tunnel bilayer structure which characterized in that: comprises an inner layer and an outer layer, wherein the outer layer comprises a first shield segment (1), a second shield segment (2), a third shield segment (3) and a top block (5), third splicing steps (6) are arranged at two ends of the third shield segment (3), second splicing steps (7) are arranged at two ends of the second shield segment (2), a first splicing step (8) is arranged at one end of the first shield segment (1), the third shield segment (3) is arranged at the bottom, four second shield segments (2) are spliced on the third splicing steps (6) at two sides of the third shield segment (3) respectively through the second splicing steps (7), two first shield segments (1) are spliced at the upper end of the second shield segment (2) respectively through the first splicing steps (8), the top block (5) is arranged between the two first shield segments (1), the device is used for compressing the first shield segment (1), the second shield segment (2) and the third shield segment (3);

the inner layer is formed by pouring fiber concrete (4) in situ, and reinforcing bars are further arranged in the fiber concrete (4).

2. The anti-corrosion shield tunnel double-layer structure according to claim 1, wherein the top block (5) comprises a block body (51), a mounting cavity (52) is formed in the block body (51), expansion blocks (56) are slidably connected to two sides in the mounting cavity (52), one side of each expansion block (56) opposite to the corresponding side is an inclined surface, a conical top piece (53) is arranged between the two expansion blocks (56) in the mounting cavity (52), a nut seat (54) is further embedded in the middle of a lower layer plate of the block body (51), a screw (55) is connected to the nut seat (54) through internal threads, and the upper end of the screw (55) is rotatably connected with the conical top piece (53).

3. An erosion resistant shield tunnel double layer construction according to claim 2 wherein said expansion blocks (56) and conical roof members (53) are steel structural members.

4. The anti-corrosion shield tunnel double-layer structure according to claim 1, wherein the first shield segment (1), the second shield segment (2) and the third shield segment (3) are all prefabricated by reinforced concrete.

5. An erosion resistant shield tunnel double layer structure according to claim 1, wherein said first (1), second (2) and third shield segments (3) are of uniform thickness.

6. An erosion resistant shield tunnel bilayer construction according to claim 1 wherein the thickness of the inner layer is the same as the thickness of the outer layer.