摘要
南龙铁路资坑隧道下穿资坑水库泄洪渠,为浅埋、富水、软弱土层地段,施工困难,风险极高,施工过程中,采用地表注浆加固地层止水,水平定向旋喷桩管棚植入结合Ⅱ型超前小导管超前支护,通过综合加固围岩、优化施工工法、三分断面形式、调整施工设备等措施,顺利穿越了复杂地层,有效提高了施工进度。
The Zikeng Tunnel of Nanlong Railway going down through the spillway of Zikeng reservoir. It is located in the place where is either shallow buried, water-rich or soft-soil, which leads to its high risk and construction difficulties. Dur- ing the construction process, by using surface grouting sealing formations, horizontal directional jet pile pipe roof implanta- tion combing with model II leading small pipe advance support and through comprehensive reinforcement of surrounding rock, construction method optimization, three-section form as well as some measures like adjusting construction equipment, we finally smoothly get through the complex formation and effectively improve the construction schedule.
作者
刘涛
杜乐乐
Liu Tao Du Lele(China Railway 21^st Bureau Group 6^th Engineering Co. Ltd. , Beijing 101111, China)
出处
《铁道建筑技术》
2016年第12期43-46,共4页
Railway Construction Technology
基金
中铁二十一局集团有限公司科研开发项目(15-C19)
关键词
浅埋
富水
松散地层
水平旋喷帷幕
三分法开挖
shallow buried
water-rich
loose strata
horizontal jet grouting curtain
excavation with trisection method
