CN-224214176-U - Multi-channel grouting sealing tail shield of push bench for karst cave stratum

CN224214176UCN 224214176 UCN224214176 UCN 224214176UCN-224214176-U

Abstract

The utility model discloses a multichannel grouting sealing tail shield of a pipe jacking machine for karst cave strata, which comprises a tail shield shell, wherein a supporting table is arranged in the tail shield shell, a multichannel grouting pipe, a grease pipe and a port seepage prevention mechanism are arranged in the supporting table, the port seepage prevention mechanism comprises a mounting groove, an electric telescopic rod, a sliding rod, a top support and an anti-corrosion and wear-resistant sealing ring, the lower end of the grease pipe is connected with a sealing brush, the multichannel grouting pipe and the grease pipe are uniformly distributed, a seepage prevention ring is arranged at a communication hole at the front end of the mounting groove, the supporting table is provided with a sliding groove, and the tail shield shell is provided with a sealing ring groove. Through the structure, the multichannel grouting pipe can be used for effectively grouting and reinforcing karst cave stratum, the grease pipe is matched with the sealing brush to realize sealing antifriction, the port seepage prevention mechanism is used for preventing mortar from seeping, the structures are operated cooperatively, the safety and the reliability of the pipe jacking machine in karst cave stratum construction are obviously improved, and the smooth construction is ensured.

Inventors

XIONG JUNLIANG
WANG YANYAN
JIN HAO
YAN JIANBO
XIAO TINGTING
LEI CHAOJUN
WANG SHIQIAO
MA CHENXIANG

Assignees

湖北神龙市政建设工程有限公司

Dates

Publication Date: 20260508
Application Date: 20250627

Claims (8)

1. The multi-channel grouting sealing tail shield of the pipe pushing machine for the karst cave stratum is characterized by comprising a tail shield shell (1), wherein a supporting table (6) is arranged in the tail shield shell (1), a multi-channel grouting pipe (3) is arranged in the supporting table (6), a grease pipe (14) is arranged in the supporting table (6), and a port seepage prevention mechanism is arranged in the supporting table (6); The port seepage prevention mechanism comprises a placement groove (10) and an electric telescopic rod (11), wherein the bottom of the placement groove (10) is fixedly connected with the electric telescopic rod (11), the front end of the electric telescopic rod (11) is fixedly connected with a sliding rod (13), the front end of the sliding rod (13) is fixedly connected with a top support (7), and the outer surface of the top support (7) is fixedly connected with an anti-corrosion and wear-resistant sealing ring (2).
2. The multi-channel grouting sealing tail shield of the push bench for karst cave stratum according to claim 1, wherein a sealing brush (15) is arranged at the lower end of the grease pipe (14), the upper end of the sealing brush (15) is fixedly connected with the inner wall of the supporting table (6), and the lower end of the sealing brush (15) is in tight contact with the pipe piece (4).
3. The multi-channel grouting sealing tail shield of a push bench for karst cave stratum according to claim 1, wherein the number of the multi-channel grouting pipes (3) is multiple and uniformly distributed in the supporting table (6), and the number of the grease pipes (14) is multiple and uniformly distributed in the supporting table (6).
4. The multi-channel grouting sealing tail shield of the push bench for karst cave stratum according to claim 1, wherein the front end of the placement groove (10) is communicated with a communication hole (9), the inner wall of the communication hole (9) is fixedly connected with an anti-seepage ring (12), and the inner wall of the anti-seepage ring (12) is in sliding connection with a sliding rod (13).
5. The multi-channel grouting sealing tail shield of the push bench for karst cave stratum according to claim 1, wherein a chute (8) is arranged on the supporting table (6) close to the outer surface, and the inner wall of the chute (8) is in sliding connection with a top support (7).
6. The multi-channel grouting sealing tail shield of the push bench for karst cave stratum according to claim 1, wherein a sealing ring groove (5) is arranged on the outer surface of the tail shield shell (1) close to the outer surface, and the inner wall of the sealing ring groove (5) is in sliding connection with an anti-corrosion and wear-resistant sealing ring (2).
7. The multi-channel grouting sealing tail shield of a push bench for karst cave stratum according to claim 1, wherein the number of the electric telescopic rods (11) is a plurality of and evenly distributed in the arrangement grooves (10) inside the supporting table (6).
8. The multi-channel grouting sealing tail shield of a push bench for karst cave stratum according to claim 1, wherein the number of the top braces (7) is plural and corresponds to the electric telescopic rods (11) one by one.

Description

Multi-channel grouting sealing tail shield of push bench for karst cave stratum Technical Field The utility model relates to the technical field of underground engineering construction, in particular to a multichannel grouting sealing tail shield of a push bench for karst cave strata. Background In underground engineering construction, the pipe jacking technology is widely applied, but when facing karst cave stratum, the traditional construction mode encounters serious challenges, the karst cave stratum is complex in structure, a large number of holes and cracks are formed in the karst cave stratum, so that the stratum stability is extremely poor, stratum collapse is easily caused during pipe jacking operation, water and soil loss around a pipe piece is caused, construction safety is seriously threatened, and engineering quality hidden danger is greatly increased. Meanwhile, underground water or corrosive media are often arranged in the karst cave, the tail shield sealing structure of the common pipe jacking machine is difficult to resist, mortar seepage cannot be effectively prevented, corrosion and abrasion are difficult to bear, the problem of sealing failure frequently occurs, and the construction process is seriously hindered, so that the sealing tail shield of the pipe jacking machine which is matched with the karst cave stratum is urgently needed, the sealing tail shield can accurately perform grouting reinforcement on the karst cave stratum, strengthen stratum stability, has excellent sealing performance, prevents impurities from invading, and ensures reliable and stable operation of the pipe jacking machine in a complex karst cave environment. Disclosure of utility model The utility model aims to at least solve one of the technical problems in the prior art, and provides a multichannel grouting sealing tail shield for a karst cave stratum, a reliable port seepage prevention mechanism drives a jacking through an electric telescopic rod, so that an anti-corrosion and wear-resistant sealing ring is lifted outwards to be in close contact with a soil layer, mortar seepage from the port can be effectively prevented, the problems of stratum collapse, water and soil loss around a duct piece and the like caused by mortar seepage are avoided, the construction safety and quality are ensured, in addition, an seepage prevention ring in a communication hole at the front end of the installation groove further enhances the seepage prevention effect, liquid and sediment are prevented from leaking from the installation groove, the sealing performance of the whole sealing tail shield is improved, the flexible structural design is realized, a sliding groove arranged on a supporting table and a sealing ring groove of a tail shield shell are respectively provided for the jacking and an anti-corrosion and wear-resistant sealing ring, the anti-corrosion and wear-resistant sealing ring can accurately play roles, a plurality of uniformly distributed electric telescopic rods provide stable power for the jacking, the consistency and the jacking of the anti-corrosion and wear-resistant sealing ring are ensured, the jacking quantity and the electric telescopic rods are in one-to-one correspondence with the electric telescopic rod, the seepage prevention mechanism is further optimized, the seepage prevention effect is enabled to have the same flexible operation structure and different construction conditions. The utility model also provides the multichannel grouting sealing tail shield for the push bench for the karst cave stratum, and the tail shield shell, wherein a supporting table is arranged in the tail shield shell, a multichannel grouting pipe is arranged in the supporting table, a grease pipe is arranged in the supporting table, and a port seepage prevention mechanism is arranged in the supporting table; The port seepage prevention mechanism comprises a placement groove and an electric telescopic rod, wherein the bottom of the placement groove is fixedly connected with the electric telescopic rod, the front end of the electric telescopic rod is fixedly connected with a sliding rod, the front end of the sliding rod is fixedly connected with a top support, and the outer surface of the top support is fixedly connected with an anti-corrosion and wear-resistant sealing ring. According to the multichannel grouting sealing tail shield of the push bench for the karst cave stratum, the lower end of the grease pipe is provided with the sealing brush, the upper end of the sealing brush is fixedly connected with the inner wall of the supporting table, and the lower end of the sealing brush is in close contact with the duct piece. According to the multichannel grouting sealing tail shield of the push bench for the karst cave stratum, the multichannel grouting pipes are multiple in number and uniformly distributed in the supporting table, and the grease pipes are multiple in number and uniformly distributed in the supporting table. Ac