CN-224228673-U - Water-soil pressure balancing device for maintaining shield receiving portal

Abstract

The utility model provides a water and soil pressure balancing device for a shield receiving portal. The water and soil pressure balancing device for the shield receiving tunnel portal comprises a steel sleeve, an air pressure bin structure, two pressure gauges and a bottom plate, wherein the air pressure bin structure is arranged at the top of the steel sleeve, the two pressure gauges are respectively arranged on the outer wall of the middle part and the outer wall of the bottom of the steel sleeve and are used for detecting the internal air pressure of the steel sleeve, the bottom of the steel sleeve is provided with the bottom plate, the top of the bottom plate is provided with a plurality of groups of supporting legs, the top of the plurality of groups of supporting legs are connected with the outer wall of the steel sleeve, and the bottom of the bottom plate is provided with a plurality of H-shaped steels. According to the water and soil pressure balancing device for the shield receiving portal, provided by the utility model, the air pressure bin structure is additionally arranged at the top of the steel sleeve, so that the air pressure in the steel sleeve can be flexibly adjusted according to the change of the stratum water and soil pressure, and the accurate balance with the stratum water and soil pressure is realized.

Inventors

• DING FEI
• PENG SHILONG
• LIU SHILONG
• Quan Maowei
• ZHANG YONGXIANG
• LIU QIGANG
• WEI YUJIAO
• ZHANG JIE
• LIANG CHENGCHENG
• TANG YUJIE
• WAN LINGLING
• Chu Yuelang
• ZHANG JIALE
• ZHANG FEI
• ZHANG MINGTAO
• DENG LIJUAN
• ZHANG GUANG
• Zhou Juheng
• WANG DONGLIN

Assignees

• 中煤第三建设（集团）有限责任公司
• 安徽建筑大学
• 合肥市轨道交通集团建设有限公司
• 合肥市市政工程协会

Dates

Publication Date

20260512

Application Date

20250707

Claims (6)

1. 1. A water and soil pressure balancing device for maintaining a shield receiving portal, comprising: A steel sleeve; the air pressure bin structure is arranged at the top of the steel sleeve; The two pressure gauges are respectively arranged on the middle outer wall and the bottom outer wall of the steel sleeve and are used for detecting the internal air pressure of the steel sleeve; The bottom of the steel sleeve is provided with a bottom plate, a plurality of groups of supporting legs are arranged at the top of the bottom plate, the tops of the plurality of groups of supporting legs are connected with the outer wall of the steel sleeve, and a plurality of H-shaped steel is arranged at the bottom of the bottom plate; The pneumatic bin structure comprises a bin pipe, a bin cover, a hollow plate, a conical block, a sealing gasket, a plurality of limiting assemblies and a movable assembly, wherein the bin pipe is arranged at the top of a steel sleeve, the bin pipe is communicated with the steel sleeve, the bin cover is arranged at the top end of the bin pipe, the bin cover is matched with the bin pipe, the hollow plate is slidably arranged in the bin pipe, and the top of the hollow plate is connected with the bottom of the bin cover; the bin cover and the hollow plate are rotatably provided with the same conical block, the sealing gasket is arranged in the bin pipe in a sealing sliding mode, the top of the sealing gasket is connected with the bottom of the hollow plate, and the outer wall of the sealing gasket is tightly attached to the inner wall of the bin pipe to form a seal.
2. 2. The device for maintaining the water and soil pressure of the shield receiving tunnel portal of claim 1, wherein a plurality of limiting components are arranged in a hollow plate in an annular array, each limiting component comprises a stirring block, a mounting block, a sliding rod, a limiting insert block, a connecting block I and a reset spring, a cavity is arranged in the hollow plate, an opening is formed in the inner wall of one side of the cavity, the stirring block is arranged in the cavity, one end of the stirring block penetrates through the opening and is connected with the outer wall of the conical block, and the stirring block is in sliding connection with the opening.
3. 3. The shield receiving tunnel portal water and soil pressure maintaining balance device according to claim 2, wherein the installation block is installed in the cavity, the sliding rod is slidably installed on the installation block, the limiting insertion block is installed on one end of the sliding rod far away from the conical block, the first connecting block is installed on one end of the sliding rod close to the conical block, the first connecting block is matched with the poking block, the return spring is slidably sleeved on the sliding rod, one end of the return spring is connected with the first connecting block, and the other end of the return spring is connected with the installation block.
4. 4. The water and soil pressure balancing device for the shield receiving portal of claim 3, wherein the outer wall of the hollow slab is provided with a plurality of through holes, the inner wall of the bin pipe is provided with a plurality of limit slots, the limit slots are respectively in one-to-one correspondence with the through holes and the limit plug blocks, and the limit plug blocks are matched with the through holes and the limit slots.
5. 5. The shield receiving tunnel portal water and soil pressure maintaining balance device according to claim 2, wherein the bin cover and the bin pipe are connected through a movable assembly, the movable assembly comprises a fixed block, two vertical blocks, a second connecting block and two rotating shafts, the fixed block is arranged on the outer wall of the bin pipe, the two vertical blocks are symmetrically arranged on the top of the fixed block, the second connecting block is arranged between the two vertical blocks, the second connecting block is connected with the bin cover, the two rotating shafts are respectively arranged on the outer walls of two sides of the second connecting block, the two rotating shafts are respectively connected with the two fixed blocks in a rotating mode, and a handle is arranged at the top of the conical block.
6. 6. The water and soil pressure balance device for the shield receiving tunnel portal of claim 1, wherein the steel sleeve is internally mixed with a filler, the filler is formed by mixing water and water-absorbing resin, and an air injection valve pipe is arranged on the steel sleeve in a communicating manner.

Description

Water-soil pressure balancing device for maintaining shield receiving portal Technical Field The utility model belongs to the technical field of subway tunnel construction devices, and particularly relates to a water-soil pressure balancing device for a shield receiving tunnel portal. Background In the field of subway tunnel construction, shield receiving is a key link, the traditional water-rich stratum subway tunnel shield receiving usually adopts a horizontal freezing and steel sleeve technology, a bearing environment is constructed through a sealed steel sleeve to balance the water and soil pressure inside and outside a tunnel portal and prevent water and sand gushing accidents, specifically, the steel sleeve and the embedded steel ring of the tunnel portal are welded in a sealing manner to form a sealed cylinder, slag soil or slurry is filled in the cylinder, the pre-pressure simulates the original stratum pressure state, the pressure in the sleeve is set according to stratum water pressure and soil pressure parameters, the soil pressure balance is maintained by controlling the packing density and grouting amount, the cylinder is coiled by adopting a specific steel plate and welded with a rib plate to strengthen the rigidity, and a support system formed by a bottom steel frame, a counter-force frame and a transverse steel support ensures the stability of the sleeve. However, the conventional technology has the disadvantages that firstly, the resource consumption is huge, a large amount of filling materials and grouting materials are needed for single receiving, a large amount of construction waste is generated, and part of engineering waste is difficult to recover, so that environmental pollution is caused. Therefore, it is necessary to provide a new water-soil pressure balancing device for maintaining the shield receiving tunnel portal to solve the above technical problems. Disclosure of utility model The utility model solves the technical problem of providing the shield receiving portal water-soil pressure balancing device which can flexibly adjust the air pressure in the steel sleeve according to the change of the stratum water-soil pressure by additionally arranging the air pressure bin structure at the top of the steel sleeve and realize the precise balance with the stratum water-soil pressure. In order to solve the technical problems, the water and soil pressure balancing device for the shield receiving portal comprises a steel sleeve; the air pressure bin structure is arranged at the top of the steel sleeve; The two pressure gauges are respectively arranged on the middle outer wall and the bottom outer wall of the steel sleeve and are used for detecting the internal air pressure of the steel sleeve; The bottom of the steel sleeve is provided with a bottom plate, a plurality of groups of supporting legs are arranged at the top of the bottom plate, the tops of the plurality of groups of supporting legs are connected with the outer wall of the steel sleeve, and a plurality of H-shaped steel is arranged at the bottom of the bottom plate; The pneumatic bin structure comprises a bin pipe, a bin cover, a hollow plate, a conical block, a sealing gasket, a plurality of limiting assemblies and a movable assembly, wherein the bin pipe is arranged at the top of a steel sleeve, the bin pipe is communicated with the steel sleeve, the bin cover is arranged at the top end of the bin pipe, the bin cover is matched with the bin pipe, the hollow plate is slidably arranged in the bin pipe, and the top of the hollow plate is connected with the bottom of the bin cover; the bin cover and the hollow plate are rotatably provided with the same conical block, the sealing gasket is arranged in the bin pipe in a sealing sliding mode, the top of the sealing gasket is connected with the bottom of the hollow plate, and the outer wall of the sealing gasket is tightly attached to the inner wall of the bin pipe to form a seal. As a further scheme of the utility model, a plurality of limiting assemblies are arranged in the hollow plate in an annular array, each limiting assembly comprises a stirring block, a mounting block, a sliding rod, a limiting inserting block, a connecting block I and a reset spring, a cavity is arranged in the hollow plate, an opening is formed in the inner wall of one side of the cavity, the stirring block is arranged in the cavity, one end of the stirring block penetrates through the opening and is connected with the outer wall of the conical block, and the stirring block is connected with the opening in a sliding manner. As a further scheme of the utility model, the installation block is installed in the cavity, the sliding rod is slidably installed on the installation block, the limiting insertion block is installed on one end of the sliding rod far away from the conical block, the first connecting block is installed on one end of the sliding rod close to the conical block, the first connecting block is