摘要
传统岩质基坑支护设计方法通常没有考虑岩质基坑与支护结构相互作用以及相邻建筑物对支挡结构和岩质基坑稳定性的影响。结合实际工程,采用PLAXIS有限元软件,分别应用有限元强度折减法和有限元法对具有相邻建筑物条件下的岩质基坑的稳定性和变形、岩石侧压力、基坑开挖对相邻建筑物的影响以及支护结构的优化设计等方面进行了分析。结合《高层建筑结构设计规程》和《建筑地基基础设计规范》提出了相邻既有建筑基础变形的控制条件,并以此作为控制基坑变形的依据,并根据岩质基坑的变形限值计算岩石侧压力和进行岩质基坑支护设计,该方法能够有效地节约造价和缩短工期。
Traditional supporting design of rock foundation pit often ignores the interaction between rock foundation pit and supporting structure as well as the effects of adjacent buildings on the supporting structure and the stability of foundation pit.Combining with practical engineering,adopting finite element program of PLAXIS,the stability and the deformation of rock foundation pit,rock lateral pressure,the influence of excavation on the adjacent buildings and the optimization design of supporting structure are analyzed respectively through finite element strength reduction method and finite element method.According to the structural design regulations of high building and design standards of foundations,the deformation control conditions of adjacent buildings are put forward,which are taken as the controlling basis,the calculation of rock lateral pressure and the design of supporting structure of rock foundation pit are carried out according to the limit values of deformation.This method can save the construction cost and cut down the construction period effectively.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2009年第S1期169-174,共6页
Rock and Soil Mechanics
关键词
相邻建筑
岩质基坑
有限元
支护结构
优化设计
adjacent buildings
rock foundation pit
finite elements
supporting structure
optimization design
