以礼河引水竖井顶拱技术性超挖施工技术  

Technical Over-excavation Construction Technology for Top Arch of Yilihe Fourth Cascade Hydropower Station Reconstruction Project

作　　者：秦政 周武 何品杰 李学辉 QIN Zheng;ZHOU Wu;HE Pin-jie;LI Xue-hui(POWERCHINA SINOHYDRO ENGINEERING BUREAU 14 CO.,LTD.,Kunming 650041,China)

机构地区：[1]中国水利水电第十四工程局有限公司,云南昆明650041

出　　处：《云南水力发电》2023年第5期69-73,共5页Yunnan Water Power

摘　　要：在地下竖井施工过程中,钻机、绞车等材料设备往往需要安置在特定的钻机基础或平台上,然而对地下竖井施工,受场地条件和周边环境的限制,竖井施工空间有限。主要描述一种全新的竖井顶拱技术性超挖方案,为以礼河四级电站复建工程地下引水隧洞中的1号、2号引水竖井施工提供了施做空间,此种全新技术性超挖方案和开挖支护技术效果较好。During the construction of underground shaft,drilling rigs,winches and other materials and equipment often need to be placed on the specific drilling rig foundation or platform.However,for the construction of underground shaft,the construction space of shaft is limited due to site conditions and surrounding environment.This paper mainly describes a new technical overexcavation scheme for the top arch of shaft,which provides space for the construction of No.1 and No.2 diversion shaft in the underground diversion tunnel of Yilihe Fourth Cascade Hydropower Station Reconstruction Project.This new technical overexcavation scheme and excavation support technology have better effect.

关 键 词：引水竖井 顶拱扩挖 开挖支护 有限空间 

分 类 号：TV554[水利工程—水利水电工程] TU942[建筑科学—建筑技术科学]