淤泥质黏土层长距离穿障水平冻结孔施工技术
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摘要
市政工程中,水平冻结法是一种有效的地基加固手段,而冻结孔施工是冻结工程的关键工序之一。以上海市轨道交通18号线隧道穿越10号线国权路车站水平冻结清障工程为例,介绍长距离水平穿障钻孔施工工艺流程以及关键技术。钻进施工结果表明:钻进装备稳定可靠,钻进工艺技术先进;钻孔偏斜率不足1%,满足工程精度要求。该施工工法能够保证钻孔精度,对同类工程具有一定的指导意义。
In a municipal project,the horizontal stratum freezing method is an effective means to reinforce the foundation,and the freezing borehole construction is one of the key procedures to the ground freezing project.Taking the barrier removing project by horizontal ground freezing method for the tunnel of Shanghai Rail Transit Line 18 passing through the Guoquan Road Station of Shanghai Rail Transit Line 10 as an example,the authors introduced the construction technique process and the key technology of the long distance horizontal barrier removing borehole.The drilling construction results show that:the drilling equipment is stable and reliable,and the drilling process technology is advanced;the deflection rate of the borehole could be less than 1%,and could meet with the precision requirements of the project.The construction method could ensure the precision of the borehole,and would have the certain guidance significances to the similar project.
In a municipal project,the horizontal stratum freezing method is an effective means to reinforce the foundation,and the freezing borehole construction is one of the key procedures to the ground freezing project.Taking the barrier removing project by horizontal ground freezing method for the tunnel of Shanghai Rail Transit Line 18 passing through the Guoquan Road Station of Shanghai Rail Transit Line 10 as an example,the authors introduced the construction technique process and the key technology of the long distance horizontal barrier removing borehole.The drilling construction results show that:the drilling equipment is stable and reliable,and the drilling process technology is advanced;the deflection rate of the borehole could be less than 1%,and could meet with the precision requirements of the project.The construction method could ensure the precision of the borehole,and would have the certain guidance significances to the similar project.
引文
[1] 李方政.市政冻结技术的应用与展望[J].建井技术,2017,38(4):55-60.
[2] 万良勇,宋战平,曲建生,等.新建地铁隧道“零距离”下穿既有车站施工技术分析[J].现代隧道技术,2015,52(1):168-176.
[3] 刘万兰.长距离联络通道冻结及开挖构筑施工[J].建井技术,2017,38(6):58-60.
[4] 李文峰,俞蔡城,杜江涛.新建隧道穿越既有车站地下连续墙围护结构洞门稳定性分析[J].施工技术,2017,46(17):82-86.
[5] 李庆禹,张建,岳鹏.圆砾地层中地铁联络通道水平冻结孔施工技术[J].现代隧道技术,2013,50(6):189-194.
[6] 马玉峰,苏立凡.地层水平冻结钻孔施工技术[J].建井技术,1999(1):40-42.
[7] 王胜利,李宁,赵玉明.复杂地层地铁旁通道冻结孔施工技术[J].现代隧道技术,2009,46(4):89-93.
[2] 万良勇,宋战平,曲建生,等.新建地铁隧道“零距离”下穿既有车站施工技术分析[J].现代隧道技术,2015,52(1):168-176.
[3] 刘万兰.长距离联络通道冻结及开挖构筑施工[J].建井技术,2017,38(6):58-60.
[4] 李文峰,俞蔡城,杜江涛.新建隧道穿越既有车站地下连续墙围护结构洞门稳定性分析[J].施工技术,2017,46(17):82-86.
[5] 李庆禹,张建,岳鹏.圆砾地层中地铁联络通道水平冻结孔施工技术[J].现代隧道技术,2013,50(6):189-194.
[6] 马玉峰,苏立凡.地层水平冻结钻孔施工技术[J].建井技术,1999(1):40-42.
[7] 王胜利,李宁,赵玉明.复杂地层地铁旁通道冻结孔施工技术[J].现代隧道技术,2009,46(4):89-93.