| 人工冻结法在圆砾地层地铁联络通道施工中的应用 |
| |
| 引用本文： | 江杰,邱居涛,陈先枝,欧孝夺.人工冻结法在圆砾地层地铁联络通道施工中的应用[J].现代隧道技术,2020(2):192-197. |
| |
| 作者姓名： | 江杰 邱居涛 陈先枝 欧孝夺 |
| |
| 作者单位： | 广西大学土木建筑工程学院;工程防灾与结构安全教育部重点实验室;广西防灾减灾与工程安全重点实验室 |
| |
| 基金项目： | 国家自然科学基金(No.51568006,No.51768006);中国博士后科学基金(2017M612865). |
| |
| 摘 要： | 南宁地铁3号线金琅区间联络通道所处地层主要为圆砾,其自稳能力差,易发生涌水冒砂、围岩扰动过大而使隧道变形的情况,设计采用人工冻结法施工。文章详细介绍了冻结过程中冻结孔布设、冻结参数选取以及土体在自然解冻后的融沉控制注浆参数优化等工艺。在积极冻结施工过程着重对盐水去回路温度、土体温度、泄压孔孔压进行分析,总结出土体温度变化、冻结壁形成的规律,准确判断通道开挖的时机,并针对联络通道冻结施工存在的问题提出了具体的对策措施。人工冻结法在该区间隧道富水圆砾层中的成功应用,可为其它类似工程提供参考。
|
| 关 键 词： | 圆砾地层 地铁 联络通道 冻结施工 |
Application of Artificial Freezing Method in Construction of Metro Cross Passage in Gravel Stratum |
| |
| JIANG Jie,QIU Jutao,CHEN Xianzhi,OU Xiaoduo.Application of Artificial Freezing Method in Construction of Metro Cross Passage in Gravel Stratum[J].Modern Tunnelling Technology,2020(2):192-197. |
| |
| Authors: | JIANG Jie QIU Jutao CHEN Xianzhi OU Xiaoduo |
| |
| Institution: | (College of Civil Engineering and Architecture,Guangxi University,Nanning 530004;Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education,Guangxi University,Nanning 530004;Guangxi Key Laboratory of Disaster Prevention and Engineering Safety,Guangxi University,Nanning 530004) |
| |
| Abstract: | The cross passages of Jinlang running tunnel section of Nanning metro line 3 are mainly located in round gravel stratum which is characterized by poor self-stability,sand gushing,water inflow and deformation caused by large rock disturbance.In view of this,the artificial freezing method is designed for construction of cross passages.The arrangement of freezing holes,selection of freezing parameters and optimization of grouting parame ters to control of settlement of soil mass after thawing is described in detail.The temperature of circulated salt water,temperature of soil mass and pore pressure of pressure relief holes are specially analyzed during construction of ac tive freezing,the rules of temperature change of soil mass and formation of frozen wall are summarized,the excava tion time of cross passage is accurately judged,and the countermeasures for the problems in freezing construction of cross passage are proposed. |
| |
| Keywords: | Round gravel stratum Metro Cross passage Freezing construction |
| 本文献已被 CNKI 维普 等数据库收录！ |
|
