A kind of shield duct piece hole for hoist sealing cover
Technical field
The present invention relates to shield duct piece, in particular to a kind of shield duct piece hole for hoist sealing cover.
Background technique
Tunnel segment hanging hole is provided on shield tunnel segment assembly, hole for hoist is the lifting built-in fitting being embedded in section of jurisdiction in advance
Internal thread hole, lift built-in fitting rear end setting extension tube, extension tube and lifting built-in fitting between be arranged water-expansible rubber circle
It is sealed.
In work progress, to prevent synchronous slurries filling between assembled duct piece float upward or section of jurisdiction and excavation face not full,
Need to get through the concrete on the outside of tunnel segment hanging hole (referring to Fig. 2) using tool, by tunnel segment hanging hole on the outside of section of jurisdiction with open
Cement, silicate double solution grouting or secondary supplement slip casting are carried out between digging face.Sealing agent is used to lift section of jurisdiction after the completion of slip casting
Hole is blocked (referring to Fig. 3).
Sealing agent contraction etc. is a variety of after by the used plugging material of tunnel segment hanging hole, construction personnel's technical level, long-time
The influence of reason leads to infiltration or leak at tunnel segment hanging hole leak sealing.The operation of subway is influenced when tunnel segment hanging hole leaks serious
Safety.This just needs to find an effective way, solves tunnel segment hanging hole and leaks bring problem.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of shield duct piece hole for hoist sealing covers, to avoid shield pipe
Piece hole for hoist occurs seeping water or leak, it is ensured that the safety of metro operation.
It is as follows that the present invention solves technical solution used by the technical problem:
A kind of shield duct piece hole for hoist sealing cover of the invention, it is characterized in that:By columnar body and positioned at its rear end
End cap is constituted, and the outer wall of columnar body has external thread structure, the external thread structure and the lifting built-in fitting being embedded in section of jurisdiction in advance
Internal thread structure be adapted;The end cap is adapted with hole for hoist external port, and containment member is arranged on inner face;The column
After shape main body is screwed into lifting built-in fitting in place, sealing is formed between end cap inner face and hole for hoist external port bottom surface.
The invention has the advantages that hole for hoist sealing cover is screwed on hole for hoist after tunnel segment hanging hole completes slip casting, it can
Sealing is formed between end cap inner face and hole for hoist external port bottom surface, effectively prevent the percolating water of tunnel segment hanging hole, reduces ground
Security risk during iron operation.
Detailed description of the invention
This specification includes following three width attached drawing:
Fig. 1 is a kind of vertical section schematic diagram of shield duct piece hole for hoist sealing cover of the present invention.
Fig. 2 is tunnel segment hanging hole structural schematic diagram
Fig. 3 is that conventional tunnel segment hanging hole blocks schematic diagram;
Component, position and corresponding label are shown in figure:Section of jurisdiction 1, lifting built-in fitting 2, extension tube 3, water-expansible rubber
Circle 4, columnar body 10, external thread structure 11, end cap 12, first annular groove 13, second annular groove 14, meets water at sealing agent 5
Expand water proof ring 15, rubber seal 16.
Specific embodiment
The following further describes the present invention with reference to the drawings.
Referring to Figures 1 and 2, a kind of shield duct piece hole for hoist sealing cover, by columnar body 10 and positioned at the end of its rear end
The outer wall of lid 12, columnar body 10 has external thread structure 11, and the external thread structure 11 and the lifting being embedded in section of jurisdiction 1 in advance are pre-buried
The internal thread structure of part 2 is adapted.The end cap 12 is adapted with hole for hoist external port, and containment member is arranged on inner face.
After the columnar body 10 is screwed into lifting built-in fitting 2 in place, formed between 12 inner face of end cap and hole for hoist external port bottom surface close
Envelope effectively prevent the percolating water of tunnel segment hanging hole, reduces the security risk during metro operation.
Referring to Fig.1, concentric the 13, second annular of first annular groove is arranged in spaced radial on the inner face of the end cap 12
Groove 14, the first annular groove 13 of inside is interior to be arranged water-swellable water proof ring 15, setting in the second annular groove 14 in outside
Rubber seal 16, wherein the expansion multiplying power of water-swellable water proof ring 15 is not less than 2.5 times.Pass through two seals for hole for hoist
It is isolated from the outside world, further increases waterproof effect.
Referring to Figures 1 and 2, Fig. 3, after the completion of 1 behind of section of jurisdiction is through hole for hoist slip casting, using sealing agent by tunnel segment hanging hole model
It encloses interior outside 200mm depth to be blocked, then installation tightens hole for hoist sealing cover of the invention on hole for hoist.Work as hole for hoist
When generating infiltration at interior sealing agent, water reaches 16 inside of rubber seal along hole for hoist internal screw thread, water-swellable water proof ring 15,
Rubber seal 16 prevents water from oozing out outward, while water-swellable water proof ring 15 expands, and then in 12 inner face of end cap and lifting
Outer end of hole mouth forms two seals between bottom surface, achievees the purpose that prevent tunnel segment hanging hole from seeping water.
The above is the explain through diagrams the present invention a kind of some principles and function of shield duct piece hole for hoist sealing cover
Can, be not intended to for the present invention to be confined to shown in and the specific structure and the scope of application in, therefore it is all it is all may be sharp
Corresponding modification and equivalent belong to the applied the scope of the patents of the present invention.