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Ultra-high performance concrete - ordinary concrete shield tunnel segment and its construction method

A shield tunnel segment and ordinary concrete technology, applied in tunnels, earthwork drilling, tunnel lining, etc., can solve the problems of concrete damage, water leakage, and easy cracking of the outer surface, so as to achieve good waterproof performance and avoid structural damage , Improve the effect of interface shear resistance

Active Publication Date: 2021-08-31
HUNAN UNIV
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide an ultra-high performance concrete-ordinary concrete shield tunnel segment and its construction method, which can overcome the problems of easy cracking on the outer surface of the existing shield tunnel segment and easy cracking of the concrete at the joints mentioned in the background technology. Technical problems such as damage and water leakage

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  • Ultra-high performance concrete - ordinary concrete shield tunnel segment and its construction method
  • Ultra-high performance concrete - ordinary concrete shield tunnel segment and its construction method
  • Ultra-high performance concrete - ordinary concrete shield tunnel segment and its construction method

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example 1

[0056] The invention provides an ultra-high performance concrete—ordinary concrete shield tunnel segment with an outer diameter of 6200mm, a wall thickness of 350mm, and a ring width of 1500mm. Among them, the ultra-high performance concrete layer is 50mm thick, the thinnest part of the flange of the ultra-high performance concrete layer is 50mm, and the thickest part is 410mm, and the thickness of the reinforced concrete layer is 300mm. The HRB400 steel bar, the stirrup adopts the HPB300 steel bar with a diameter of 10mm, the concrete grade is C50, and the compressive strength of ultra-high performance concrete is 150Mpa.

[0057] The present invention also provides a construction method of the ultra-high performance concrete-ordinary concrete shield tunnel segment, comprising the following steps:

[0058] Step 1. Welding steel mesh and steel cage respectively;

[0059] Step 2: Lift the reinforcement cage into the reinforced concrete layer mold, install the grouting hole res...

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Abstract

The invention discloses an ultra-high-performance concrete-ordinary concrete shield tunnel segment and a construction method thereof. The segment includes an ultra-high-performance concrete layer and a reinforced concrete layer embedded in the ultra-high-performance concrete layer. The above-mentioned ultra-high performance concrete layer and the reinforced concrete layer form a unified whole, bear load together, and coordinate deformation. The beneficial effects of the ultra-high-performance concrete-ordinary concrete shield tunnel segment and its construction method provided by the present invention are as follows: the ultra-high-performance concrete-ordinary concrete shield tunnel segment adopts a combined structure, which can not only increase the bearing capacity, improve joints and Bolt hole stress performance, but also has good toughness and waterproof ability.

Description

technical field [0001] The invention relates to the technical field of subway shield tunnels, in particular to an ultra-high performance concrete-ordinary concrete shield tunnel segment and a construction method thereof. Background technique [0002] The rapid development of shield construction technology has made shield tunnels the main structural form of urban rail transit tunnels in my country at this stage. However, with the continuous expansion of shield tunnel construction and operation mileage, the existing shield tunnel segments are always inevitably damaged, leaking and other problems. [0003] The shield tunnel segment is located underground, and the environment is generally poor. Groundwater, corrosive liquids, etc. directly contact the outer surface of the segment for a long time. If the segment is cracked or damaged under uneven load, there is no operating space around , The site does not have the conditions for repair and reinforcement. Therefore, the current...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/08B28B1/087B28B11/24B28B23/02
CPCB28B1/087B28B11/245B28B23/022E21D11/08E21D11/086
Inventor 陈仁朋刘源阮世强张阳吴怀娜孟凡衍
Owner HUNAN UNIV
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