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Reinforcing body and method for shield end of subway tunnel

A technology of tunnel shielding and reinforcement, which is applied in tunnels, earthwork drilling, infrastructure engineering, etc. It can solve problems such as excessive deformation of the ground surface and collapse, safety accidents, etc., and achieve safety, uniform strength, and short construction period. Effect

Active Publication Date: 2019-05-31
CCCC THIRD HARBOR ENG +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the construction process of shield tunneling, accidents such as excessive surface deformation and collapse are prone to occur when the shield is launched and received, especially when the reinforcement at the end (also known as the hole) fails to meet the design requirements or the reinforcement fails, safety accidents are extremely prone to occur

Method used

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  • Reinforcing body and method for shield end of subway tunnel
  • Reinforcing body and method for shield end of subway tunnel
  • Reinforcing body and method for shield end of subway tunnel

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Embodiment Construction

[0047] The present invention will be further described below in conjunction with accompanying drawing.

[0048] see figure 1 and figure 2 , the reinforced body at the end of the subway tunnel shield is arranged at the rear end of the enclosure structure 100 of the subway tunnel. The reinforced body includes a concave ground connection wall 10 on the outside and a three-axis stirring pile located inside the ground connection wall 10 Reinforcement structure 30, ground connection wall 10 and three-axis mixing pile reinforcement structure 30, and three-axis mixing pile reinforcement structure 30 and enclosure structure 100 are lapped by high-pressure rotary grouting piles 20, 0.5 meters below the bottom of shield tunnel 300 to Sleeve valve pipe grouting reinforcement 40 is used within 3 meters; the ground connection wall 10 is a C20 plain concrete wall with a total height of 20.845 meters and a depth of 5m below the bottom of the shield tunnel 300; the width of the three-axis mi...

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Abstract

The invention discloses a subway tunnel shield end reinforcing body and a reinforcing method. The reinforcing body comprises a ground continuous wall with a concavely surrounded outer side, and a three-shaft stirring pile reinforcing structure positioned in the ground continuous wall; the ground continuous wall and the three-shaft stirring pile reinforcing structure, and the three-shaft stirring pile reinforcing structure and the surrounded structure are joined by high-pressure jet grouting piles; and a sleeve valve pipe is used for grouting reinforcement below the bottom of a shield tunnel in a range of 0.5-3 m. The reinforcing method comprises the following steps: firstly, the ground continuous wall is constructed; then, a three-shaft stirring pile is reinforced, and the sleeve valve pipe is used for grouting reinforcement; and finally, the high-pressure jet grouting piles are joined. The invention discloses a subway tunnel shield end reinforcing structure. The reinforcing body and the reinforcing method enable reinforced soil to achieve excellent uniformity, independence and water resistance.

Description

technical field [0001] The invention relates to a reinforcement body and a reinforcement method for the shield end of a subway tunnel. Background technique [0002] The superiority of underground railway transportation in solving urban traffic problems is very obvious. In recent years, subway construction has been widely spread across the country. In subway construction projects, shield tunneling is widely used as an intelligent construction machine for tunnel construction. During the construction of the shield tunneling project, accidents such as excessive surface deformation and collapse are prone to occur when the shield is launched and received, especially when the reinforcement at the end (also known as the hole) fails to meet the design requirements or the reinforcement fails, safety accidents are extremely prone to occur . Therefore, the launch and reception of shield tunneling is generally regarded as a difficult and key project today, and it is also one of the impo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D5/18E02D5/46E02D15/02E02D15/04E02D19/10E21D9/14
CPCE02D5/18E02D5/46E02D15/02E02D15/04E02D19/10E02D2250/0023E02D2250/003E02D2300/0023E02D2300/0042E21D9/14
Inventor 谭锋桂红生卢毅林加戍
Owner CCCC THIRD HARBOR ENG
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