Influence of slurry infiltration model on face stability mechanism

LI Yun; ZHANG Zi-xin

English Version Journal Login

您当前的位置：

首页 >

文章列表页 >

Influence of slurry infiltration model on face stability mechanism

更新时间：2026-06-25

- Influence of slurry infiltration model on face stability mechanism
- Vol. 27, Issue S1, (2006)
- 作者机构：
  
  1. 同济大学岩土工程重点实验室,上海,200092
  2. 同济大学土木工程学院地下建筑与工程系,上海,200092
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU443
- Online First：15 December 2006，
  
  Published：2006
- 稿件说明：
移动端阅览
LI Yun, ZHANG Zi-xin. Influence of slurry infiltration model on face stability mechanism[J]. 2006, 27(S1).
DOI：

LI Yun, ZHANG Zi-xin. Influence of slurry infiltration model on face stability mechanism[J]. 2006, 27(S1). DOI：

摘要

泥水平衡盾构开挖时，泥浆与开挖面上的土体会形成一层不透水的泥膜，以便泥浆压力有效地作用在开挖面上。但由于刀盘的不断切削，泥膜并不能完全地阻止泥浆对前方土体的渗透，特别是在渗透性较大的砂性土体，或在特殊地质条件下出现泥浆与土体性质不匹配的时候。这种渗透将会减小泥浆对开挖面的支撑作用，过剩泥浆压力将以渗透力的形式作用于开挖面土体。为了定量考虑渗透对开挖面稳定性的削弱，提出了针对泥水平衡盾构开挖面稳定性的泥浆渗透模型。结合极限平衡法的村山公式，考虑泥水的渗透区域与滑动面之间的几何关系对泥水压力进行折减，得到了泥浆渗透模型的开挖面稳定性安全系数，并采用此渗透模型探讨了泥浆渗透对开挖面稳定性的影响。通过与工程算例对比分析表明，实际工程中所需的泥浆压力明显大于“薄膜模型”的计算结果。因此，采用渗透模型进行开挖面稳定性分析是合理、有效的。

Abstract

During the excavation of tunnels in saturated soft soils

pressurized bentonite slurry is often used to support the tunnel face. The slurry should form a filter cake

which is used to transfer the support pressure onto the soil. This filter cake is constantly removed by the cutter head of the slurry shield and slurry will infiltrate into the soil while the filter cake rebuilds. This results in a decreasing of the support effectiveness of the slurry. To quantify the influence of these decreasing of the face stability

an infiltration model has been incorporated in a limit equilibrium analysis. The decreasing of safety factor of face stability according to the permeability of the soil in front is analyzed. The slurry pressure calculated with this model has been compared with field measurements. It is shown that the slurry pressure needed is significantly higher

compared with full-membrane calculations.

关键词

Keywords

references

Views

127

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Stability analysis of three-dimensional bridge abutment slope based on strength reduction method for inhomogeneous slope

Research on effect of closed air pressure on slope stability under intense rainfall

Analysis of slope stability based on modified relationship of intermediate principal stress

Researches on general stability for dump slope based on three-dimensional geologic model

Improving displacement mutation criterion of slope failure in strength reduction finite element method

Related Author

HU Song-shan

TONG Shen-jia

LIU Bin-qing

TAN Hua

QIN Runpu

WANG Ji-cheng

YU Jian-lin

GONG Xiao-nan

Related Institution

Guangxi Key Laboratory of Road Structure and Materials，Guangxi Transportation Research Institute

Institute of Road Engineering, Guangxi Transportation Research Institute

School of Civil Engineering, Xi’an University of Architecture & Technology

Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University

College of Architecture and Civil Engineering, Taizhou Vocational and Technical College

AI问答

⁰