上海某220kV地下变电站基坑工程优化设计  

Optimization Design of a 220 kV Underground Substation Excavation in Shanghai

作　　者：刘漾[1] 姜波 马晓元 霍晓波 

机构地区：[1]同济大学地下建筑与工程系,上海200092 [2]上海电力设计院有限公司,上海200025

出　　处：《结构工程师》2015年第4期199-205,共7页Structural Engineers

基　　金：国家电网公司科技项目"地下变电站优化设计技术研究"(5150011044)

摘　　要：以上海地区某220 kV地下变电站基坑工程为基础,采用启明星及Plaxis进行数值模拟,结合与已建基坑工程进行类比的方法,分析了地下连续墙的插入比、坑内加固参数（加固深度、宽度、厚度及抽条加固置换率）对基坑稳定性、安全系数、墙体位移及墙体内力等的影响,得到如下结论：1基坑的最优插入比可选定在0.75-0.8之间;2基坑坑内被动区土体加固优化方案为加固深度17.1 m,加固厚度11 m,加固宽度3 m,抽条加固置换率0.3。A series of parametric studies for a 220 kV underground substation excavation in Shanghai area were performed with the two-dimensional finite element code Qimstar and Plaxis.The results were compared with the local historical cases to investigate the effects of the penetration ratios and the reinforcement parameters （i.e.,reinforcement depth,width,thickness and replacement ratio of strip strengthening soil）on the stability of excavations,safety factors,displacements and internal forces of diaphragm walls.On the basis of the numerical analysis results,some major findings were obtained：（1 ）the optimization penetration ratio was between 0.75 to 0.8;（2）the optimization strengthening scheme of soil was that the strengthening depth, strengthening thickness and the width of strengthening soil,and the replacement ratio of strip strengthening soil were 17.1 m,11 m,3 m and 0.3,respectively.

关 键 词：基坑 地下变电站 优化设计 数值分析 工程类比 

分 类 号：TM63[电气工程—电力系统及自动化] TU473[建筑科学—结构工程]