摘要
杭州地铁某区间联络通道发生涌水涌砂事故,导致地面塌陷、燃气管线断裂泄漏、周边建筑物发生倾斜及沉降。在原有盐水冷冻系统全部失效且无法恢复的情况下,结合实际对事故发生原因进行分析探讨,最后采用地面液氮垂直冻结地层加固止水技术,为洞内抢险快速封堵联络通道洞门及拆除受损房屋赢得宝贵时间,事故抢险及应急处理措施可为防范及发生类似事故的处理提供借鉴。
The water and sand gushing accidents are caused in a connecting passage of Hangzhou Metro,which results in ground collapse,gas pipeline rupture and leakage,and the inclination and settlement of surrounding buildings.Under the condition that the original brine freezing system is all invalid and unable to recover,the technology on ground liquid nitrogen vertical freezing stratum is used to reinforce the water stop,so as to win precious time for quickly blocking the connecting passage of tunnel portal and demolition of damaged houses.Accident rescue and emergency treatment measures will provide references for prevention and occurrence of similar accidents.
作者
王江华
WANG Jianghua(China Railway 19th Bureau Group Rail Transit Engineering Co.Ltd.,Beijing 101300,China)
出处
《铁道建筑技术》
2020年第S01期185-187,196,共4页
Railway Construction Technology
关键词
液氮冻结
联络通道
应急抢险
管片修复
liquid nitrogen freezing
connecting passage
emergency rescue
segment restoration
