• CSCD核心中文核心科技核心
  • RCCSE(A+)公路运输高质量期刊T1
  • Ei CompendexScopusWJCI
  • EBSCOPж(AJ)JST
二维码

隧道建设(中英文) ›› 2022, Vol. 42 ›› Issue (S1): 183-190.DOI: 10.3973/j.issn.2096-4498.2022.S1.021

• 研究与探索 • 上一篇    下一篇

新加坡典型上软下硬土层深基坑参数敏感性研究——以新加坡樟宜机场建设某地下工程为例

吴兰婷, 王康, 周锋   

  1. (中国公路工程咨询集团有限公司, 北京〓100089
  • 出版日期:2022-07-22 发布日期:2022-08-23
  • 作者简介:吴兰婷(1980—),女,江西九江人,2005年毕业于西南交通大学,桥梁与隧道工程专业,硕士,高级工程师,现从事地下工程结构设计与研究工作。Email: wult@ccccltd.sg。

Parametric Sensitivity Study of Deep Foundation Pit in Upper Soft and Lower Hard Strata in Singapore: a Case Study of Underground Project 

in Singapore Changi Airport Development

WU Lanting, WANG Kang, ZHOU Feng   

  1. (China Highway Engineering Consultants Corporation, Beijing 100089, China)
  • Online:2022-07-22 Published:2022-08-23

摘要:

基于新加坡东部上软下硬地层工程实例,通过有限元数值模拟计算,采用硬化土模型(HS),对土体预钻松动效应、围护桩在刚性土层中的埋入深度、地基改良层的弹性模量等不同设计参数进行敏感性分析,研究结果表明: 1)预钻能松动支护结构周围的土体,有利于围护桩打设; 2)地基加固层弹性模量的增加会引起加固层处墙体的弯矩增加,因此加固层的弹性模量并非越大越好; 3)在基坑设计时,不宜采用单一的参数进行设计,应对参数进行敏感性分析,使其与实际受力情况相符合。

关键词: 深基坑, 上软下硬土层, 有限元法, 预钻孔, 入岩深度, 地基加固, 硬化土模型

Abstract: The finite element method with harden soil model are employed to conduct sensitivity study of various design parameters such as predrilling loosen effect, embedded length of retaining piles in rigid stratum, and elastic module of ground improvement layer in upper soft and lower hard strata in Singapore. The results show the following: (1) Predrilling will loosen the surrounding soil of the retaining wall to provide condition for retaining wall construction. (2) The increase of elastic module of ground reinforcement layer will increase the bending moment of retaining wall, hence, the elastic module of ground reinforcement layer should be within a certain range. (3) It is essential to vary the input parameters within a reasonable range, and sensitivity analysis should be conducted for the parameters to ensure the safety of the project.

Key words: deep foundation pit, upper soft and lower hard strata, finite element method, predrilling, embedded length, ground reinforcement, harden soil model