A low-modulus high-damping rubber for seismic isolation of shield tunnels and its preparation and application

A seismic isolation and tunnel technology, applied in tunnels, tunnel linings, shaft equipment, etc., can solve the problems that the durability of water-swellable materials cannot be guaranteed, and the performance of water-swellable rubber rings cannot be fully exerted, and it is easier to achieve construction quality Control and improve the effect of seismic isolation and the effect of reducing the maximum shear stress

Active Publication Date: 2021-07-02
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual bolt tightening process, due to the excessive or too small bolt tightening, the performance of the water-swellable rubber ring cannot be fully exerted, and the durability of the water-swellable material is often not guaranteed.

Method used

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  • A low-modulus high-damping rubber for seismic isolation of shield tunnels and its preparation and application
  • A low-modulus high-damping rubber for seismic isolation of shield tunnels and its preparation and application
  • A low-modulus high-damping rubber for seismic isolation of shield tunnels and its preparation and application

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preparation example Construction

[0049] The present invention also provides a preparation method of the low-modulus high-damping rubber, comprising the steps of:

[0050] (1) Carry out masticating natural rubber raw rubber, control the masticating temperature to 40-50°C, add the first compounding agent, and knead to obtain natural rubber compound; the first compounding agent includes active zinc oxide, accelerator, One or more of carbon black and sulfur;

[0051] (2) Masticate the chlorinated butyl rubber raw rubber, control the plasticating temperature to 40-50°C, add the second compounding agent, and mix to obtain the chlorinated butyl rubber compound; the second compounding agent includes petroleum One or more of resin, activated zinc oxide, accelerator, carbon black and sulfur;

[0052] (3) After mixing the natural rubber compound and chlorinated butyl rubber compound, add a third compounding agent and mix uniformly to obtain a mixed compound; the third compounding agent includes carbon black, nano-scale...

Embodiment 1

[0072] Such as figure 1 As shown, in this embodiment, the natural rubber is first masticated 6 times on the open mill, and the temperature of the open mill is controlled to be 45°C, and 0.8wt% of active zinc oxide and 1.5wt% of the accelerator DZ(N,N -dicyclohexyl-2-benzothiazole sulfenamide), 25wt% carbon black, 1.5wt% sulfur, through 5 times of rubber tapping, triangular bagging, rolling, and uniform mixing to obtain natural rubber rubber compound.

[0073] The chlorinated butyl raw rubber was masticated on the open mill for 6 times, the temperature of the open mill was controlled at 45°C, and 15wt% petroleum resin, 0.8wt% active zinc oxide, and 1.5wt% accelerator DZ(N,N-di Cyclohexyl-2-benzothiazole sulfenamide), 25 wt% carbon black, 1.5 wt% sulfur. After 5 times of rubber tapping, triangular bagging, rolling, and uniform mixing, the chlorinated butyl rubber compound was obtained.

[0074] Mix natural rubber compound and chlorinated butyl rubber 1:1. Add 1.5wt% anti-agin...

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Abstract

The invention belongs to the field of rubber materials and the field of subway shield tunnel engineering, and more particularly relates to a low-modulus and high-damping rubber for shield tunnel seismic isolation and its preparation and application. Combined with the characteristics of the shield tunnel itself, the material and structure of the shield tunnel isolation layer are re-selected and designed, and a low modulus and high damping rubber material is specially selected as the shield tunnel isolation layer, which is set in the shield tunnel. Between the tunnel soil and the tunnel segment, the seismic isolation rubber layer can effectively achieve seismic isolation and high damping ratio for underground structures such as shield tunnels, and at the same time enhance the waterproof performance of the tunnel to a certain extent, especially suitable for urban subway shields Seismic isolation of tunnels.

Description

technical field [0001] The invention belongs to the field of rubber materials and the field of subway shield tunnel engineering, and more specifically relates to a low-modulus high-damping rubber for seismic isolation of shield tunnels and its preparation and application. Background technique [0002] With the development and utilization of underground space in China, a large number of subway tunnels have been built in my country, and the mileage of tunnels under construction is still growing rapidly. The shield method has many advantages such as high degree of mechanization, small impact on the surrounding environment, safe and fast construction, and has become the mainstream construction method of subway tunnels. [0003] Earthquake zones are widely distributed in our country, especially many large cities with built subways are located in different seismic zones. For example, Beijing and Tianjin are located in the North China Plain earthquake zone, Guangzhou and Xiamen ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L7/00C08L23/28C08L57/02C08L95/00C08K13/02C08K3/04E21D11/00
CPCC08L7/00C08L23/283C08L2205/03C08L2205/035E21D11/00C08L57/02C08L95/00C08K13/02C08K3/04
Inventor 魏威袁涌陈健资道铭李琛
Owner HUAZHONG UNIV OF SCI & TECH
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