Portal construction method of parallel pipe-jacking tunnel
A construction method and portal technology, applied in tunnels, tunnel linings, earthwork drilling and mining, etc., can solve problems such as inapplicability, and achieve the effect of improving stability
Pending Publication Date: 2021-07-27
中建八局华南建设有限公司
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Problems solved by technology
[0002] In the design and construction process of the main line tunnel of rail transit, there will be situations where the left and right line tunnels need to be designed next to each other because the track line cannot be adjusted. The conventional design of installing an independent door steel ring for each tunnel is in this case. case not applicable
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[0038] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.
[0039] Such as figure 1 and figure 2 Shown, a kind of portal construction method of parallel pipe jacking tunnel, comprises the following steps:
[0040] a. Design and assemble the door steel ring and central column of the pipe jacking tunnel:
[0041] a1. Design the steel ring size of the portal and the size of the center column according to the size of the pipe jacking machine and the tunnel spacing;
[0042] a2. Process the steel plate and anchor bar into the steel ring of the portal according to the designed steel ring size of the portal, and process the steel plate into the central column according to the designed size of the central column.
[0043] b. The structure of the portal when constructing the first top of the pipe jacking tunnel:
[0044] b1. Binding the wall, column and beam steel bars at the portal of the pipe j...
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The invention relates to a portal construction method of a parallel pipe-jacking tunnel. The portal construction method comprises the following steps that a, portal steel rings and middle stand columns of the pipe-jacking tunnel are designed and assembled; b, a tunnel portal structure during first jacking of the pipe-jacking tunnel is constructed; c, jacking of the first top of the pipe-jacking tunnel is completed, and then a tunnel portal structure of the first top of the pipe-jacking tunnel is dismantled; d, a tunnel portal structure during second jacking of the pipe-jacking tunnel is constructed; and e, jacking of the second top of the pipe-jacking tunnel is completed, and then the tunnel portal concrete structure is constructed. The portal construction method of a parallel pipe-jacking tunnel has the beneficial effects that the middle stand columns are installed in the tunnel portal steel rings through the bolts, the middle stand columns are correspondingly matched with the two sides of the tunnel portal steel rings, so that a tunnel portal structure for the left-line tunnel jacking pipe and the right-line tunnel jacking pipe is formed in sequence, and jacking of the left-line tunnel jacking pipe and the right-line tunnel jacking pipe can be carried out through the tunnel portal steel rings, so that it is ensured that the portal structure can meet the clearance requirement of the parallel pipe-jacking machine.
Description
technical field [0001] The invention relates to the technical field of pipe jacking construction, in particular to a method for constructing a portal of a parallel pipe jacking tunnel. Background technique [0002] In the design and construction process of the main line tunnel of rail transit, there will be situations where the left and right line tunnels need to be designed next to each other because the track line cannot be adjusted. The conventional design of installing an independent door steel ring for each tunnel is in this case. case is not applicable. Therefore, it is necessary to design a special portal construction method that can satisfy parallel rectangular pipe jacking with a distance of less than 300mm, so as to ensure that the portal structure between the two tunnels does not affect the starting and receiving of pipe jacking. Contents of the invention [0003] The object of the present invention is to overcome the above problems in the prior art, and provid...
Claims
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Patent Timeline
Login to View More IPC IPC(8): E21D9/00E21D9/14E21D11/10E21D11/38
CPCE21D9/00E21D9/14E21D11/105E21D11/38
Inventor 陈奕才刘勇李博常龙刘堂明韩杰夏天
Owner 中建八局华南建设有限公司