土工基础

›› 2014, Vol. 28 ›› Issue (6): 79-82.

• 工程实录 • 上一篇    下一篇

复合土钉墙现场测试及数值模拟分析研究

张树龙1，董希祥2 ，李连祥1   

  1. （1.山东大学基坑与深基础工程技术研究中心，济南 250061；2.济南西城投资开发集团有限公司，济南 250300）
  • 收稿日期:2014-10-28 出版日期:2014-12-25 发布日期:2015-01-12
  • 作者简介:张树龙（1988-），男，硕士，研究方向为基坑与深基础与数值模拟。

Field Testing and Numerical Analysis of a Composite Soil Nailing Wall

ZHANG Shulong1, DONG Xixiang2, LI Lianxiang1   

  1. (1. Excavation and Deep Foundation Engineering Research Center, Shandong University, Jinan, 250061;
    2. West Jinan Investment and Development Group Co., Ltd., Jinan, 250300)
  • Received:2014-10-28 Online:2014-12-25 Published:2015-01-12

摘要： 整理分析了济南西部新城某地下车库基坑的复合土钉墙支护结构现场监测数据，采用有限元软件ABAQUS建立基坑支护结构单元三维模型，模拟了其开挖支护施工过程，动态分析基坑边坡坡顶地表水平位移、沉降变化规律，并与现场监测值进行对比，分析了微型桩与止水帷幕对复合土钉墙的影响。表明由土钉、止水帷幕、微型桩、预应力锚杆与土体相互作用的有限元力学模型能较好模拟复合土钉墙支护施工过程，结果可供同类复合土钉墙设计施工提供参考。

关键词: 复合土钉墙, 三维模型, 现场检测, 对比分析

Abstract: This paper presents the deep excavation monitoring results of an underground parking garage of West Jinan New City project. The deep excavation was supported by the composited soil nail walls. The excavation and the supporting progresses are simulated by the three dimensional finite element analysis using ABAQUS. The simulated lateral displacement and vertical settlement at the ground surface near the excavation are compared with the measured values. The influences of micropile and seepage cutoff wall on the performance of the composite soil nail wall are also analyzed. The results indicate that the numerical model that includes the soil nail, seepage cutoff wall, micropile, and prestressed ground anchor can reasonably simulate the progress of the deep excavation supported by the composite soil nails.

Key words: Composite Soil Nail Walls, ThreeDimensional Numerical Model, Field Monitoring, Comparative Analyses