Overall removal method of assembled negative ring segments in shield tunneling method
A technology of negative ring segment and contact channel, which is applied in the field of dismantling of assembled negative ring segment, can solve the problems such as the narrow top space of negative ring segment and the inability to provide vertical lifting operation space of a spreader, so as to avoid construction risks. , the effect of large weight and volume
Active Publication Date: 2020-05-26
CHINA RAILWAY SHANGHAI ENGINEERING BUREAU GROUP CO LTD +1
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Problems solved by technology
[0004] However, in the construction of the shield tunnel, the assembled negative ring segment is assembled in the main line tunnel of the subway when the shield tunnel is launched. Due to the limitation of the inner diameter of the main line tunnel, the top space of the negative ring segment is very narrow. The vertical lifting operation space of the spreader cannot be provided, which makes the removal of the negative ring segment one of the difficulties in the construction of the assembled communication channel
Method used
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[0036] see figure 1 , Figure 1a , figure 2 , Figure 2a , Figure 4 with Figure 4a In this embodiment, the overall dismantling structure of the assembled negative ring segment in the shield tunneling method is as follows: each negative ring segment 5 that has been assembled and carried by the support system trolley 1 is fixed with bolts, and channel steel 10. Fix and connect each negative ring segment 5 in the axial direction to form a negative ring segment cylinder with an integral structure; There is a movable distance between them; the retracted rear support plate 3 and the negative ring segment cylinder are fixed and connected as a whole with a rigid tie rod 10a, and the vertical column 1a and the rear part of the support system trolley 1 are used to The horizontal support cylinder 4 between the support plates 3 can push the rear support plate 3, so that the negative ring segment cylinder and the positive ring segment 6 can be separated.
[0037] In specific imple...
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The invention discloses a shield method contact channel assembled negative ring segment overall demolition method which is characterized by including the steps: fixing assembled negative ring segmentssupported by a support system trolley by bolts, axially and fixedly connecting the negative ring segments by steel channels to form an integrated negative ring segment cylinder; forming a movable distance between a recovered rear supporting plate and the side wall of a shield tunnel in the support system trolley; fixedly and integrally connecting the recovered rear supporting plate with the integrated negative ring segment cylinder by the aid of a rigid pull rod, ejecting the rear supporting plate by a cross supporting oil cylinder arranged between a vertical column and a rear supporting plate in the support system trolley, and separating a negative ring segment cylinder from a positive ring segment. According to the method, the negative ring segments are demolished as a whole in the construction process of an assembled contact channel.
Description
technical field [0001] The invention relates to the construction field of subway main line tunnels and interval communication passages, and more specifically relates to an assembled negative ring segment removal method applied in the construction of shield method communication passages. Background technique [0002] In the initial construction of the shield machine, the negative ring segment is a temporary structure that provides reaction force for the excavation of the shield machine; the negative ring segment basically adopts the same structural form as the positive ring segment; the negative ring segment is set on the shield Between the mechanism power system and the back support system, the structural rigidity and strength of the back support system and the negative ring segment provide stable reaction force for the tunneling of the shield machine. [0003] In the prior art, the application of the negative ring segment in the construction of the subway main line tunnel i...
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IPC IPC(8): E21D11/08E21D9/06E21D11/40
CPCE21D9/06E21D11/083E21D11/406
Inventor 丁修恒程文锋康会鑫郎志超何邦亮文毅然石雷程桂芝
Owner CHINA RAILWAY SHANGHAI ENGINEERING BUREAU GROUP CO LTD