超长距离水平MJS地基加固施工实例分析  

Analysis on Reinforcement Construction of Extra-long Distance Horizontal MJS Subgrade

作　　者：陈帅 梁捷 CHEN Shuai;LIANG Jie

机构地区：[1]上海宏波工程咨询管理有限公司,上海市201707

出　　处：《城市道桥与防洪》2020年第9期157-161,174,M0017,共7页Urban Roads Bridges & Flood Control

摘　　要：日本国土面积小、城市建筑密集,为适应城市建设发展需要,早在1982年业已研究出较为成熟的管幕暗挖工法。我国在上海轨道交通14号线桂桥路站首次应用管幕暗挖工法进行车站主体结构施工。主要介绍管幕暗挖工法之超长距离水平MJS工法桩地基加固施工质量控制,施工时的水平度、水灰比、地内压力是水平MJS工法施工成败的关键,由于MJS工法具有孔内强制排浆功能,为合理控制排浆量,保证地内压力处于平衡状态,因而设定的地内压力控制值与施工深度的比值,从而有效控制地基加固质量,保证周边环境安全。Japan has a small land area and dense urban buildings.In order to adapt the needs of urban construction and development,early in 1980,a more nature method of underground excavation for pipe curtain has been studied.The method of underground excavation for pipe curtain is firstly used in Guiqiao Road Station of Shanghai Metro Line 14 to construct the main structure of the station.The quality control of reinforcement construction of extra-long distance horizontal MJS pile subgrade by the method of underground excavation for pipe curtain is mainly introduced.The level degree,water cement ratio and pressure in ground during the construction are the key to the success or failure of horizontal MJS construction.Because MJS method has the function of forced grouting in the hole,in order to reasonably control the discharge amount and to keep the pressure in the ground in balance,therefore,the ratio of the pressure control value in the ground to the construction depth is set so as to efficiently control the reinforcement quality of subgrade and to ensure the safety of the surrounding environment.

关 键 词：超长距离 水平MJS工法桩 地基加固 水灰比 地内压力 

分 类 号：U455[建筑科学—桥梁与隧道工程]