CN-224214187-U - Shield tunnel grouting lifting bag structure

CN224214187UCN 224214187 UCN224214187 UCN 224214187UCN-224214187-U

Abstract

The utility model relates to the technical field of underground structural engineering, in particular to a grouting lifting bag structure of a shield tunnel, which comprises a grouting pipe, a bag pipe and a bag, wherein the grouting pipe is connected with the bag pipe, the bag pipe is arranged in the bag in a penetrating way, a grouting outlet is formed in a pipe section of the bag pipe in the bag, the bag is conical-like and is matched with a pipe piece ring of the shield tunnel, the bag pipe is arc-shaped and is matched with the bag, and the grouting pipe is arc-shaped and is matched with the bag pipe. The grouting device has the advantages that the diffusion of grouting materials can be limited within a certain range by the aid of the bag, the lifting effect on the tunnel is more concentrated, and because the bag is conical-like in shape, a large amount of slurry accumulated at the bottom of the bag can generate a sufficient lifting force effect on the bottom of the tunnel in the grouting process, a smaller amount of slurry accumulated at the top of the bag acts on the side part of the shield tunnel, a certain additional load is generated on the side part of the tunnel in the grouting process, and transverse oval deformation of the tunnel in the grouting process is prevented.

Inventors

HUANG DAWEI
FAN XIAOYU
Jiang Qiangbo
CHEN YONGQING
LIU HONGYANG
WEI MING
ZHANG ZHI

Assignees

华东交通大学

Dates

Publication Date: 20260508
Application Date: 20250523

Claims (6)

1. The shield tunnel grouting lifting bag structure is characterized by comprising a grouting pipe, a bag pipe and a bag, wherein the grouting pipe is connected with the bag pipe, the bag pipe penetrates through the bag, a grouting outlet is formed in a pipe section of the bag pipe, the shape of the bag is similar to a cone shape matched with a shield tunnel pipe piece ring, the shape of the bag pipe is an arc matched with the bag, and the shape of the grouting pipe is an arc matched with the bag pipe.
2. The lifting bag structure for grouting of the shield tunnel according to claim 1, wherein a one-way valve is arranged between the grouting pipe and the bag pipe, and the circulation direction of the one-way valve is from the grouting pipe to the bag pipe.
3. The shield tunnel grouting lifting bag structure of claim 2, wherein the bottom of the grouting pipe and the top of the one-way valve are provided with matched threads, and the grouting pipe and the one-way valve are detachably connected and fixed.
4. The grouting lifting bag structure of the shield tunnel according to claim 1, wherein a conical bottom cone is arranged at the bottom of the bag pipe.
5. The grouting lifting bag structure of the shield tunnel according to claim 1, wherein the head end and the tail end of the bag are respectively fixed at the top and the bottom of the bag pipe, and the joint is sealed.
6. The lifting bladder structure for grouting shield tunnel according to claim 1, wherein the shape of the bladder is conical, and the outer contour dimension of the bladder gradually expands from the top to the bottom after grouting.

Description

Shield tunnel grouting lifting bag structure Technical Field The utility model relates to the technical field of underground structural engineering, in particular to a grouting lifting bag structure of a shield tunnel. Background The shield tunnel is formed by splicing the subway shield tunnel with lining segments through bolts, and the structural characteristics of the shield tunnel are sensitive to the change of surrounding environment, so that the shield tunnel is inevitably influenced by numerous adjacent engineering activities, such as surface loading, underpass construction, vehicle vibration and the like, and the longitudinal deflection deformation of the shield tunnel is extremely easy to be induced. Excessive longitudinal deflection deformation can cause various shield tunnel structure defects, such as tunnel leakage water, open circular seam joints, track bed void and the like, which can seriously affect the service performance of the shield tunnel and endanger the operation safety of subways. The grouting lifting at the bottom of the shield tunnel is used as a common vertical deflection deformation overrun remediation technology, so that the tunnel deformation can be recovered, the geometric shape and position of the track can be corrected, the internal force of the tunnel and the track structure and the stress of the segment joint can be improved, the stratum soil body can be reinforced, and the method has the advantages of high construction efficiency and low cost and is widely applied to engineering practice. However, the slurry diffusion of the traditional grouting device and the traditional grouting process is influenced by various factors such as stratum conditions, the water content of the slurry and the like, the slurry diffusion has uncertainty, additional load cannot be stably generated in the stratum, and secondary diseases are possibly generated. Therefore, the traditional bottom grouting device and the technology have very limited effect on the improvement of the overrun of the longitudinal deflection of the shield tunnel. Disclosure of Invention According to the defects of the prior art, the utility model provides the shield tunnel grouting lifting bag structure, and the diffusion of slurry is limited within the lifting action range below the shield tunnel segment ring through the restraining action of the bag, so that the improvement effect on the grouting lifting at the bottom of the shield tunnel is improved. The utility model is realized by the following technical scheme: The shield tunnel grouting lifting bag structure is characterized by comprising a grouting pipe, a bag pipe and a bag, wherein the grouting pipe is connected with the bag pipe, the bag pipe penetrates through the bag, a grouting outlet is formed in a pipe section of the bag pipe, the shape of the bag is similar to a cone shape matched with a shield tunnel pipe piece ring, the shape of the bag pipe is an arc matched with the bag, and the shape of the grouting pipe is an arc matched with the bag pipe. A one-way valve is arranged between the grouting pipe and the sac pipe, and the circulation direction of the one-way valve is from the grouting pipe to the sac pipe. The bottom of slip casting pipe and the top of check valve are provided with the screw thread of looks adaptation, slip casting pipe with constitute detachable connection between the check valve and fix. The bottom of the bag tube is provided with a conical bottom cone. The head and tail ends of the bag are respectively fixed at the top and the bottom of the bag tube, and the interface is sealed. The shape of the pouch is conical-like, meaning that the pouch has an outer contour dimension that gradually expands from its top to its bottom after grouting. The utility model has the advantages that: 1) Through the restraint effect of the bag, the diffusion of the slurry is limited within a certain range, so that the problems of secondary diseases and the like caused by slurry splitting diffusion, permeation diffusion, slurry leakage phenomenon, unstable grouting effect and the like in a tunnel are avoided, and the slurry diffusion can generate a larger lifting force effect in a stratum. 2) The shape design of the arc grouting pipe and the conical-like bag enables the grouting process to have a sufficient influence range on the shield tunnel, and a small amount of grouting at the side part of the tunnel can prevent overlarge transverse oval deformation in the grouting process when grouting at the bottom. 3) The bag has the function of isolating the grout from the soil body, avoids the direct contact of the grout and the soil body, and reduces the influence of stratum conditions on grouting materials and the performance requirements on the grouting materials. Drawings FIG. 1 is a schematic view of the mounting structure of the present utility model; FIG. 2 is a schematic view of the present utility model after grouting; FIG. 3 is a schematic illustration of t