复合土钉墙支护FLAC3D数值模拟与实测结果对比

›› 2008, Vol. 29 ›› Issue (S1): 129-135.

复合土钉墙支护FLAC3D数值模拟与实测结果对比

张尚根

解放军理工大学国防与人防工程系，江苏南京 210007

收稿日期:2008-07-25 出版日期:2008-11-11 发布日期:2016-04-15
作者简介:张尚根，男，1963年生，博士后，主要从事地下工程的教学、科研与设计工作

Comparative analysis of FLAC3D numerical simulations and field test of composite cement-soil nailing wall retaining

ZHANG Shang-gen

Department of national and Civil Defense Engineering, PLA University of Science and Technology, Nanjing 210007, China

Received:2008-07-25 Online:2008-11-11 Published:2016-04-15

摘要/Abstract

摘要： 针对深基坑复合土钉墙支护的特点，运用FLAC3D软件进行深基坑开挖与土钉支护过程的数值模拟，计算中采用摩尔-库仑弹塑性模型，接触面运用接触单元来模拟土体与土钉之间的相互作用。通过计算得到了基坑不同开挖及土钉支护过程中土钉轴力沿钉长分布、墙后土体深层水平位移、周围地表沉降、坑底隆起及潜在滑动面等变化情况，并与实测结果比较发现二者吻合较好，计算结果对工程施工和设计具有一定的指导意义。同时说明所采用的FLAC3D计算模型和分析方法是可靠的，能够满足工程的精度要求，能够较好地运用于实际工程中的分析与预测。

关键词: 深开挖, 复合土钉支护, 接触单元, FLAC3D, 实测值, 对比分析

Abstract: In accordance with composite soil nailing technology for deep excavation, the FLAC3D is used to simulate the process of construction by composite cement-soil nailing wall. During the simulation Mohr-Coulomb model is used and contact elements are applied to the interfaces between the soil nailing and soil. This simulation offers the axial force of soil nailing along nails length distribution, the horizontal displacements of soil, the settlements of ground, the uplifts in the bottom of the pit and the potential slip surface foundation pit in every step. The comparative results show that the FLAC3D results are basically consistent with data of field test. The FLAC3D results are worth use for reference in practical applications and design too. Furthermore, the agreement shows that FLAC3D model and analytical method are reliable. And the results of FLAC3D numerical simulations can satisfy the need of engineering, so it can be well applied to analyze and predict practical engineering.

Key words: deep excavation, composite soil nailing retaining, contact element, FLAC3D, field test data, comparative analysis

中图分类号:

TU 470

张尚根. 复合土钉墙支护FLAC3D数值模拟与实测结果对比[J]. , 2008, 29(S1): 129-135.

ZHANG Shang-gen. Comparative analysis of FLAC3D numerical simulations and field test of composite cement-soil nailing wall retaining[J]. , 2008, 29(S1): 129-135.

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