全回转套管拔桩技术在北京核心区地铁施工中的应用  

APPLICATION OF FULL ROTATION CASING PILE PULLING TECHNOLOGY IN SUBWAY CONSTRUCTION IN BEIJING CORE AREA

作　　者：王伟 尚丛珊 王泽志 WANG Wei;SHANG Cong-shan;WANG Ze-zhi(BCEG Civil Engineering Co.,Ltd.,100015,Beijing,China)

机构地区：[1]北京建工土木工程有限公司,北京100015

出　　处：《建筑技术》2020年第7期778-781,共4页Architecture Technology

摘　　要：北京地铁首都机场线西延北新桥站外挂厅围护结构地下连续墙施工范围内有3根钢筋混凝土钻孔灌注桩,为保证地下连续墙顺利施工,采用360°全回转套管机沉入,将桩身与土体分离减摩后拔除。该方法对周边环境影响小,对临近既有建(构)筑物破坏程度低,切割稳定性好,安全可靠且拔除效率高,工期短,适合在城市核心区等环境受限地区开展施工。There are three pieces of reinforced concrete filling pile within the diaphragm wall construction scope of externally-cantilever hall enclosure structure in the Beixinqiao station along the Beijing capital airport subway line west extension.To guarantee smooth construction of diaphragm wall,360-degree full circle swinging jacketing machine was used to separate the piles from soil and then withdraw them.This method produced small influence on surrounding environment and made low damage to existing buildings and structures.It has favorable cutting stability,high safety and reliability,high withdraw efficiency and short construction schedule,so it is applicable to urban central district where there are limitations from surrounding environment.

关 键 词：地铁工程 围护桩 全回转套管 拔桩 

分 类 号：TU753[建筑科学—建筑技术科学]