摘要
对某明挖隧道两区段,采用正交试验方法,利用MIDAS/GTS建立模型,探究各措施对减小支护结构及周边建筑变形的效果。结果表明:围护墙墙厚和土体加固深度可有效减小变形,围护墙插入比和加固体置换率影响不显著;隔离桩桩长及其与基坑距离对变形影响显著,隔离桩桩径影响不明显。对支撑道数、围护墙插入比、围护墙墙厚、坑底加固和分仓施工的定量分析表明,支撑道数和坑底加固影响最大,其次为围护墙墙厚和分仓施工,围护墙插入比影响最小。
Choosing two sections of a tunnel open excavation , using the orthogonal experiment method, with MIDAS/GTS software, the models were established to explore the effectiveness of different design measures to reduce the deformation of retaining structure and surrounding buildings. The results indicated that the enlargement of retaining wall width and the reinforcement depth at passive zone, which can effectively reduce the deformation, nevertheless, the insertion ratio of retaining wall and the replacement rate of reinforced soil had less effects on the deformation indexes. Isolated pile length and the distance between pile and foundation excavation had significant effects on the deformation indexes. The isolated pile diameter hasn * t obvious influence on the indexes. The quantitative analysis of five measures, which is number of the strut, insertion ratio of retaining wall, retaining wall width, reinforcement at passive zone and partition construction, showed that number of the strut and reinforcement at passive zone had the greatest influence on the indexes, followed by retaining wall width and partition construction, and the insertion ratio of retaining wall had the minimum influence on the indexes.
作者
安然
龚迪快
成怡冲
曾婕
AN Ran;GONG Dikuai;CHENG Yichong;ZENG Jie(Zhejiang Huazhan Institute of Engineering Research and Design, Ningbo, Zhejiang 315012, China)
出处
《施工技术》
CAS
2019年第13期80-86,共7页
Construction Technology
基金
宁波软土地区明挖隧道施工对周边建筑影响及保护(甬建科评字[2016]第24号)
关键词
隧道
基坑
隔离桩
正交试验
变形
tunnels
foundation excavation
isolated pile
orthogonal test
deformation
