摘要
快融注浆就是通过冻土内热盐水循环使冻土温度逐渐上升并快速解冻,同时进行土体注浆控制融沉。在上海市轨道交通13号线单侧泵站工程中,采用快融注浆方法,通过合理设置解冻分区和解冻顺序,优化解冻工艺、注浆参数及注浆时机,加快了冻结壁的解冻速度,减少了融沉固结的时间,缩短跟踪注浆的周期,从而更好地控制地层融沉,保证了地铁隧道的后期建设工期及安全运营。
Quick melt grouting is to raise the temperature of the frozen soil gradually and unfreezing the soil rapidly,at the same time control the thawing settlement by grouting the melt soil.The quick melt grouting method is applied in a project of the unilateral pumping station on Shanghai metro Line 13.By reasonable setting of the thawing zone and the thawing sequence,the thawing process,grouting parameters and grouting time are optimized.As a result,the thawing speed of the frozen wall is accelerated,while the thawing and consolidation time of the soil is reduced.This technology shortens the period of tracing compensation grouting,controls the stratum thawing and subsidence effectively,therefore guarantees the later construction period and safety operation of metro tunnel.
作者
史志明
卢为杰
马忠政
郝明强
SHI Zhiming;LU Weijie;MA Zhongzheng;HAO Mingqiang(China Coal Tunnel Engineering Co.,Ltd.,221001,Xuzhou,China;不详)
出处
《城市轨道交通研究》
北大核心
2020年第9期170-174,共5页
Urban Mass Transit
关键词
隧道
单侧泵站
冻结法
快速解冻
融沉注浆
tunnel
unilateral pumping station
freezing method
fast thawing
fast thaw grouting
