施工技术 2013年4月上 80 CONSTRUCTION TECHNOLOGY 第42卷第7期 D0I:10.7672/sgj2013070080 风积砂地层隧道导向水平旋喷桩超前 加固与预留核心土台阶法施工技术* 晏启祥，刘罡1，耿萍1，朱家稳2 (1 西南交通大学交通隧道工程教育部重点实验室，四川成都610031； 2.中铁二局集团第一工程有限公司，责州贵阳550003) [摘要]为解决风积砂地层隧道施工难题，提出了风积砂地层隧道施工的导向水平旋喷桩超前支护技术和先行施 作仰拱边墙结合部预留核心土台阶法开挖技术，前者的技术关键是导向技术，后者的技术关键是上下台阶施工长 度、上下核心土临时加固质量以及两侧墙角仰拱结合部快速跟进时机.通过现场工艺试验、数值模拟以及工程施 工实践表明：采用水平旋喷柱超前支护与预留核心土台阶法联合施工，能有效控制风积砂地层的变形，确保施工安 全和施工进度. [关键词]隧道工程；风积砂地层；导向水平旋喷桩；预留核心土台阶法；监测 [中图分类号]TU74;U455 【文献标识码]A [文章编号]1002-8498(2013)07-0080-05 Application of Horizontally-oriented Rotary Jet Grouting Pile and Bench Construction Along Reserved Core-soil Technology in Aeolian Sand Strata Tunnel Yan Qixiang' Liu Gang' Geng Ping' Zhu Jiawen2 (1.MOE Key Laboratory of Transportation Tunnel Engineering Southwest Jiaotong University Chengdu Sichuan 610031 China;2.China Railway Erju First Engineering Co. Ltd. Guiyang Guizhou 550003 China) Abstract:To solve these problems it was proposed to use advanced support technology with horizontally- oriented rotary jet grouting piles and the excavation method of pre-construction of the inverted arch-side walls junctions with reserved core-soil bench.The key technology for the former is the orientation technology and for the latter are the construction lengths of the upper and lower benches the mass of the upper and lower core soil for temporary strengthening and accurate follow-up timing for the inverted arch- side walls junction construction.Field testing numerical simulation and construction pract...
风积砂地层隧道导向水平旋喷桩超前加固与预留核心土台阶法施工技术.pdf
