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| Pipeline conveying resistance and slag carrying characteristics of large diameter slurry shield circulation system |
| CHEN Jian1, XUE Feng1, ZHAO Hequan2, FANG Zhongyu2
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1. China Railway 14th Bureau Group Co., Ltd., Jinan 250014, Shandong, China;
2. China Railway 14th Bureau Group Big Shield Engineering Co., Ltd., Hangzhou 310000, Zhejiang, China |
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Abstract Based on the slurry shield circulation system of Wangjiang Road Tunnel Project in Hangzhou, a model of drainage pipe was built in three parts. The effects of mud velocity and mud weight on pipeline pressure loss and slag-carrying characteristics of slurry shield circulation system were studied. According to the pressure loss and distribution under the actual construction parameters obtained by the simulation model, the installation position of the drainage pump was calculated. The results showed that the pressure loss could be reduced with the increased of pipe diameter, and the effect was gradually reduced with the increase of pipe diameter. The pressure loss was almost proportional to the mud density and increases with the increase of inlet velocity, and the growth trend increased with the increase of velocity. Mud inlet velocity was an important factor affecting the conveying capacity of pipeline. With the increase of mud flow rate, the influence of mud weight on the accumulation quality would be weakened.
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Published: 04 November 2020
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