Small-diameter shield tunnel F-block limiter

A shield tunnel, small-diameter technology, applied in the field of limiters, can solve the problems of shield tail brush damage, impact of forming tunnel, segment rupture, etc., and achieve the effect of convenient installation and disassembly

Active Publication Date: 2021-06-11
SHANGHAI FOUND ENG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the construction period, the segment misalignment often troubles the construction technicians. It not only affects the appearance quality of the tunn

Method used

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  • Small-diameter shield tunnel F-block limiter
  • Small-diameter shield tunnel F-block limiter
  • Small-diameter shield tunnel F-block limiter

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Embodiment Construction

[0020] The features of the present invention and other relevant features are described in further detail below in conjunction with the accompanying drawings through the embodiments, so as to facilitate the understanding of those skilled in the art:

[0021] Such as Figure 1 to Figure 6 As shown, the F-block limiter of the small-diameter shield tunnel of the present invention includes a bolt 1 , an L-shaped buckle 2 and a U-shaped buckle 3 . The upper side of the L-shaped buckle 2 is provided with a screw hole, and the lower side is provided with a connecting through hole.

[0022] The lower side of the L-shaped buckle 2 is connected to the longitudinal bolt of the segment through the connecting through hole, and the upper side is tightened and fixed by the bolt 1 to form a thrust force to the outside of the segment.

[0023] The U-shaped buckle 3 connects and fixes the L-shaped buckle 2 and the pre-embedded iron castings of the segment, so as to prevent the inner arc surface...

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Abstract

The invention relates to a small-diameter shield tunnel F-block limiter. The small-diameter shield tunnel F-block limiter comprises a bolt, an L-shaped buckle and a U-shaped buckle, a screw hole is formed in the upper side face of the L-shaped buckle, and a connecting through hole is formed in the lower side of the L-shaped buckle; the lower side of the L-shaped buckle is connected with a duct piece longitudinal bolt through the connecting through hole, and the upper side of the L-shaped buckle is tightened and fixed through the bolt to form jacking force towards the outer sides of duct pieces. The L-shaped buckle and a duct piece embedded iron casting are fixed through the U-shaped buckle, and the situation that the inner arc faces of the duct pieces are opened due to the fact that the duct pieces are subjected to external soil pressure, and friction resistance between the duct pieces is increased is avoided. The small-diameter shield tunnel F-block limiter is characterized in that the bolt is connected with the L-shaped buckle to form jacking force towards the outer side of a tunnel so as to balance the acting force of peripheral soil bodies on an F block during shield tunneling, the U-shaped buckle is connected with the L-shaped buckles and the duct piece embedded iron castings, and the situation that the inner arc faces of the duct pieces are opened due to the fact that the duct pieces are subjected to peripheral soil pressure, and consequently the friction resistance between the duct pieces is increased is avoided; and the problem that slab staggering on the two sides of the formed tunnel top sealing block is too large is effectively solved, and it is ensured that the shield tunnel forming quality meets the standard requirement.

Description

technical field [0001] The invention relates to a stopper used in shield tunneling construction, in particular to a stopper for a small-diameter shield tunnel. Background technique [0002] With the continuous development of the city and the rapid increase of the population, the construction method of water supply, drainage, gas and other pipelines used in the past can no longer meet the demand, and people gradually turn their attention to the construction technology of underground excavation. The shield method construction technology has entered people's field of vision due to its high degree of mechanization, low impact on the ground, and high quality. Shield tunnels often use prefabricated block segments, which are assembled into a ring in the shield assembly area to form a tunnel. During the construction period, segment misalignment often troubles the construction technicians. It not only affects the appearance quality of the tunnel, but also causes problems such as tun...

Claims

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Application Information

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IPC IPC(8): E21D9/06E21D11/08
CPCE21D9/06E21D9/0607E21D11/08Y02E10/20
Inventor 刘桂荣梁东青刘冠梁邹峰熊菲
Owner SHANGHAI FOUND ENG GRP
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