泥炭质土环境下大型环撑基坑变形控制分析  

Deformation Control Analysis of Large Annular Plate Braced Foundation Pit in Peat Soil Environment

作　　者：李肖君 郭磊 蒲七 孔维俭 李云坤 胡利韦 李志坚 王石权 Li Xiaojun;Guo Lei;Pu Qi;Kong Weijian;Li Yunkun;Hu Liwei;Li Zhijian;Wang Shiquan(YCIH No.12 Construction Co.,LTD., kunming 650500,2.China Nonferrous Metals Industry 14th Metallurgical Construction Company.,Kunming,650000;China Nonferrous Metals Industry 14th Metallurgical Construction Company.,Kunming,650000)

机构地区：[1]云南建投第十二建设有限公司,昆明650500 [2]中国有色金属工业第十四冶金建设公司,昆明650000

出　　处：《建设科技》2019年第18期95-98,共4页Construction Science and Technology

摘　　要：为了研究泥炭质土环境下基坑的变形情况,本文结合昆明某大型环形板撑基坑工程实例,根据基坑土体深层水平位移和基坑周边高架桥桥墩变形监测数据,分析其施工过程中基坑的变形情况。研究表明,该泥炭质土基坑的土体深层水平位移量较大;两道环形板撑施工完成后土体位移的增长速率明显减缓;高架桥桥墩的水平位移和竖向沉降始终未达到监测报警值;本工程所采用的支护桩+支承桩+二道钢筋混凝土环形板撑支护体系能较为有效地控制土体变形。In order to study the deformation of foundation pit in peat soil environment, this paper combined with a large annular plate braced foundation pit in Kunming, based on the monitoring data of deep horizontal displacement of foundation pit soil and deformation of viaduct pier, analyzed the deformation of foundation pit during construction. The results show that the deep horizontal displacement of the foundation pit is large. The growth rate of soil displacement slowed down obviously after the construction of two annular plate braces. Horizontal displacement and vertical settlement of viaduct piers have never reached the monitoring alarm value. The supporting piles and two reinforced concrete annular plate bracing support system adopted in this project can effectively control soil deformation.

关 键 词：泥炭质土 基坑工程 环形板撑 变形 

分 类 号：TU753[建筑科学—建筑技术科学]