Shield excess hole construction method

A construction method and technology for entering and exiting holes, which are applied in earth-moving drilling, mining equipment, tunnels, etc., can solve problems such as high construction risks, and achieve the effects of ensuring the safety of entering and exiting holes, saving construction time, and reducing project costs.

Inactive Publication Date: 2015-03-04
HAINAN UNIVERSITY
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  • Abstract
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  • Claims
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Problems solved by technology

[0003] The purpose of the present invention is to provide a construction method for shield tunnel entry and exit, aiming to solve the problem of high construction risk in the process of shield tunnel entry and exit

Method used

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Embodiment Construction

[0012] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0013] A construction method for shield tunnel entry and exit, comprising the following steps:

[0014] (1) After the main structure of the shield well is completed, the underground diaphragm wall is used as the enclosure structure, and glass fiber bars are used to replace the steel bars of the ground connection wall at the portal where the shield machine passes through the groove wall of the ground connection wall;

[0015] (2) Build a reinforced concrete box in front of the portal and backfill it with soil to seal it. When the shield tunnel starts, the backfill soil seals the shield machine in th...

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Abstract

The invention provides a shield excess hole construction method. After a body structure of a shield well is finished, an underground continuous wall serves as an enclosing structure; glass fiber ribs are used for replacing reinforcements in the position of a shield tunneling machine crossing through a hole door of a groove wall of the underground continuous wall; a reinforcement concrete box is cast before the hole door, and is filled with soil for sealing; when the shield is started, the shield tunneling machine is closed in the reinforcement concrete box by the filled soil; when the shield is arrived, the whole reinforcement concrete box is fully filled with the filled soil; the shield tunneling machine directly cuts off the hole door to finish the starting or the arrival; when the shield is started, the shield tunneling machine directly cuts off the hole door in the closed reinforcement concrete box to finish the starting; and when the shield is arrived, the shield tunneling machine enters the closed reinforcement concrete box to finish the arrival after directly cutting off the hole door.

Description

technical field [0001] The invention belongs to the technical field of tunnel excavation, and in particular relates to a construction method for shield tunnel entry and exit. Background technique [0002] The shield access hole is a key link in the construction of a shield tunnel, and it has great engineering construction risks. When the shield enters and exits the tunnel, the general construction method is to complete the main structure of the shield tunnel first, then improve and strengthen the soil at the end of the shield tunnel, and then chisel out the reinforced concrete enclosure at the entrance to complete the shield tunnel. departure or arrival. Among them, the time required for demolition of the cave door is very tight, and the construction is difficult. After the portal is demolished, the strength and sealing of the reinforced body are very high. If the reinforcement effect is not good, the gap between the shield and the portal and the surface settlement will ea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/14E21D9/08
CPCE21D9/14E21D9/08
Inventor 胡俊
Owner HAINAN UNIVERSITY
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