Using stochastic continuum model to simulate hydro-mechanical processes in deformed fractured rock during tunnel excavation

CHEN Wei; RUAN Huai-ning

English Version Journal Login

您当前的位置：

首页 >

文章列表页 >

Using stochastic continuum model to simulate hydro-mechanical processes in deformed fractured rock during tunnel excavation

更新时间：2026-06-25

- Using stochastic continuum model to simulate hydro-mechanical processes in deformed fractured rock during tunnel excavation
- Vol. 29, Issue 10, (2008)
- 作者机构：
  
  河海大学岩土工程研究所,南京,210098
- 作者简介：
- 基金信息：
- DOI：
  CLC： O242.1
- Online First：03 August 2013，
  
  Published：2008
- 稿件说明：
移动端阅览
CHEN Wei, RUAN Huai-ning. Using stochastic continuum model to simulate hydro-mechanical processes in deformed fractured rock during tunnel excavation[J]. 2008, 29(10).
DOI：

CHEN Wei, RUAN Huai-ning. Using stochastic continuum model to simulate hydro-mechanical processes in deformed fractured rock during tunnel excavation[J]. 2008, 29(10). DOI：

摘要

利用能够反映岩体水力性质空间变异特性的随机连续模型对隧洞开挖过程中的裂隙岩体渗流-应力耦合过程进行了数值分析。随机渗透系数场通过顺序指示模拟方法生成。顺序指示法是一种非参数地质统计学技术，他允许输入任何形式的渗透系数概率分布而不需要对分布做任何假设。由随机模拟生成的渗透系数场被投影到有限元计算网格中进行耦合分析。力学响应使用基于连续介质的节理本构模型来反映岩体中软弱面的影响。结果表明，随机连续模型能够较好地预测裂隙岩体的稳定入渗率，水力性质的空间变异性对裂隙介质的耦合过程起着重要作用。在不排水条件下，隧洞每次开挖开始时，由于岩石应力重分布，孔隙水受到扰动，短时间内不能流动平衡，因此孔压会迅速上升，这对于围岩稳定是不利的。

Abstract

The coupled hydro-mechanical processes in fractured rock during tunnel excavation are analyzed

using the stochastic continuum model that represents the spacial variability in hydraulic properties of fractured rock mass. The stochastic permeability fields are generated with the sequential indicator simulation

which is a non-parametric geostatistical technique and allows the input of the permeability probability distribution of arbitrary shape. The resulted permeability fields are then mapped onto the 3D finite element grids for the coupled hydro-mechanical analysis. A joint material model that can represents the weaken planes with specific orientations is used for the mechanical calculation in the study. The results show that the stochastic continuum model can predict the inflow rate into the tunnel; and the natural

spacial variability in hydraulic properties plays an important role in the coupled hydro-mechanical processes of the fractured rock mass. It is also found that the pore pressure will rise quickly before the water has a chance to move and equilibrate at the beginning of every excavation stage. This transient coupled hydro-mechanical effect may cause local failures in rock.

关键词

Keywords

references

Views

1456

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Analysis of stress path and deformation-failure mechanism of high cutting loess slope

Finite element simulation of excavation and support of abutment slope at Dagangshan Hydropower Project

Finite element simulation of permeable pipe pile driving considering consolidation process

Influence of excavation unloading on vertical bearing behavior of existing pile groups

Reliability analysis of landslide-thrust and internal forces of anti-slide pile based on strength reduction finite element method

Related Author

HOU Xiao-kun

LI Tong-lu

LI Ping

QI Zu-fang

TANG Zhong-min

JIANG Qing-hui

WEI Wei

PAN Shao-hua

Related Institution

School of Geological Engineering and Surveying, Chang’an University

Key Laboratory for Geo-hazards in Loess Area of Ministry of Land and Resources, Xi’an Center of Geological Survey, China Geological Survey

State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University

Chengdu Hydroelectric Investigation and Design Institute, China Hydropower Consulting Group

College of Transportation Engineering, Nanjing University of Technology

AI问答

⁰