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Construction method of six-zone digging of super cross section tunnel

A super-large section and construction method technology, applied in tunnels, tunnel linings, earthwork drilling and mining, etc., can solve the problems of slow construction progress, construction mutual interference, and many blocks, so as to achieve fewer excavation steps, reduce the number of temporary supports, The effect of using less

Active Publication Date: 2012-08-22
CHINA TIESIJU CIVIL ENG GRP CO LTD +1
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Problems solved by technology

And because there are many blocks, the construction of each step sequence will interfere with each other, and the construction progress will be slow

Method used

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  • Construction method of six-zone digging of super cross section tunnel
  • Construction method of six-zone digging of super cross section tunnel
  • Construction method of six-zone digging of super cross section tunnel

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Embodiment Construction

[0028] see figure 1 , in this embodiment, the section of the tunnel is divided into upper left area ①, upper right area ②, upper middle area ⑤, lower left area ③, lower right area ④, and lower middle area ⑥ on the tunnel section according to the top, bottom, left, middle, and right. , according to the division that was constructed first to form a ring first, and then form a ring together with the adjacent division when the construction of the adjacent division is completed, and finally the tunnel as a whole forms a ring, forming a construction method of early closure and early formation of the ring. The specific construction steps are as follows:

[0029] 1. Construction of Part ① and Part ②

[0030] figure 2 As shown, the tunnel is constructed separately on the left and right sides. After the smooth blasting of the ① part, the construction of the initial support 2 of the ① part and the temporary upper left intermediate wall support 8 is carried out in time to form a small-s...

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Abstract

The invention discloses a construction method of six-zone digging of a super cross section tunnel, which is characterized in that the cross section of the super cross section tunnel is divided into an upper left zone (1) part, an upper right zone (2) part, an upper middle zone (5) part, a lower left zone (3) part, a lower right zone (4) part and a lower middle zone (6) part in the mode of partitioning by upper and lower direction as well as left, middle and right directions, and construction in each part is carried out in an orderly mode. The method of the invention has stable structure, safety and high efficiency and can effectively quicken construction progress and save temporary support cost input.

Description

technical field [0001] The invention relates to a construction method for excavating super-large-section tunnels, which is applied in the construction of subways, expressways, railways and the like. Background technique [0002] Super-large sections, such as Majiayan Station of Chongqing Metro Line 1, the excavation width of the circular arch section of the straight wall is 20.6-21.34m, the height is 17.494-18.021m, and the maximum excavation section area reaches 326.949m 2 . [0003] The main construction method of super-large section tunnel excavation mainly lies in the division of divisions. In the prior art, there are nine methods, eleven methods, etc. Due to the large number of blocks, more temporary supports are required, and the construction cost is relatively large. And because there are many blocks, the construction of each step sequence interferes greatly with each other, and the construction progress is slow. Contents of the invention [0004] The present in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/01E21D11/10
Inventor 潘彪杨翼熊庆华张勇朱善美
Owner CHINA TIESIJU CIVIL ENG GRP CO LTD
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