Algorithm for predicting slurry penetration distance in front of slurry shield tunnel face

被引：1
|
作者：
Yin X.-S. [1 ]
Zhu Y.-H. [2 ]
Wei G. [1 ,2 ]
Ding Z. [1 ]
Cui Y.-L. [1 ]
机构：
[1] College of Engineering, Zhejiang University City College, Hangzhou
[2] College of Civil Engineering and Architecture, Zhejiang University, Hangzhou
来源：
Zhejiang Daxue Xuebao (Gongxue Ban)/Journal of Zhejiang University (Engineering Science) | 2021年 / 55卷 / 12期
关键词：
Filter cake; Infiltration column test; Slurry formula; Slurry shield;
D O I：
10.3785/j.issn.1008-973X.2021.12.002
中图分类号：
P57 [矿物学];
学科分类号：
070901 ;
摘要：
An improved model was proposed based on the existing slurry penetration calculation model, and the penetration distances of different slurry were analyzed, in order to calculate the distance of slurry penetration into the stratum before slurry shield tunnel face. Results showed that the maximum precision of the improved model was 6%, higher than that of Xu model when the infiltration time was less than 20 s, and no infiltration column tests are required. Without considering the filter cake, the maximum penetration distance of the pure bentonite slurry was 5.8-6.3 m. The maximum penetration distance of bentonite slurry with the polymer materials was 0.3-1.6 m, which was 5-25% of pure bentonite slurry. Sodium carboxymethyl cellulose has the best modification effect on slurry. The formation time of low-permeable filter cake was 3.2-5.0 s. The correction factor for the improved model was 0.72-0.92, which is obtained with consideration of the filter cake. Predicting the penetration distance of commonly used slurry, the penetration distance at 10 s of the shield cutter passing cycle was 2.3-6.3 cm, and the maximum penetration distance was 1.05% of the general shield diameter (6 m). © 2021, Zhejiang University Press. All right reserved.
引用
收藏
页码：2234 / 2242
页数：8
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