土工基础

›› 2017, Vol. 31 ›› Issue (2): 143-148.

• 工程实录 • 上一篇    下一篇

泥质板岩的岩性特征与基坑支护优化

陈腾飞，张可能   

  1. （有色金属成矿预测与地质环境监测教育部重点实验室，中南大学地球科学与信息物理学院，长沙 410083）
  • 收稿日期:2016-02-25 修回日期:2016-03-02 出版日期:2017-04-20 发布日期:2017-05-04
  • 作者简介:陈腾飞(1990-)，男，硕士研究生，研究方向为地质工程。

Characterization of Argillaceous Slate and Optimization of Supporting System for a Deep Excavation

CHEN Tengfei, ZHANG Keneng   

  1. (Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environmental Monitoring, Ministry of Education, School of Geosciences and InfoPhysics, Central South University, Changsha, 410083)
  • Received:2016-02-25 Revised:2016-03-02 Online:2017-04-20 Published:2017-05-04

摘要： 泥质板岩是典型的一类软岩，在长沙地区较为常见，其岩性特征及地层特点是造成某些工程变形、产生安全隐患的主要原因。以长沙市岳麓区某泥质板岩基坑工程为例，阐述了泥质板岩基坑的地层岩性特征，对原桩锚支护方案进行了优化设计，并对基坑最危险剖面进行了变形判定分析。基坑边坡的监测数据表明：基坑支护方案优化后，整体形变量满足设计要求。

关键词: 软岩, 泥质板岩, 基坑优化支护

Abstract: Argillaceous slate is a typical soft rock which is commonly encountered in urban Changsha area. The stratigraphic and lithologic characteristics of the slate might also be the main sources of the construction safety hazard. This paper presents a case study of the deep excavation project within the argillaceous slate soft rock. The subsurface lithology is briefly introduced and an improved design of the original soldier pile with the ground anchor is also presented. The deformation analysis was performed at the location with least safety factor. The construction monitoring data indicates that the deformation of the excavated area was satisfactory.

Key words: Soft Rock, Argillaceous Slate, Deep Excavation Optimization