摘要
富水砂卵石地层具有结构松散、空隙率大、高渗透性的特点，在进行注浆加固设计时，合理地确定注浆参数是注浆加固成功与否的关键。以长沙某地铁车站为工程依托，结合富水砂卵石地层的特点，针对水泥-水玻璃（CS）双液浆注浆凝结时间控制难、注浆孔距设计凭经验确定等问题，通过室内注浆材料试验、现场注浆试验及有限元数值模拟对注浆材料参数及注浆孔距进行优化分析，提出相应的注浆控制标准。研究结果表明：富水砂卵石地层采用CS双液浆注浆，当水灰比取0．8～1．0时，水玻璃浓度应控制在40波美度左右，水玻璃掺合量控制在8％～10％，注浆孔间距宜控制在1．8m左右。
Choosing reasonable grouting parameter is the key to grouting reinforcement for Water - soaked sandand cobble stratum, which has the characteristics of looseness, large porosity and high permeability. Taking asubway station in Changsha as the project background, in the light of the actual problems of cement - sodium sili-cate slurry grouting including difficultly controlling the setting time and empirically determining grouting holespacing, the paper has optimized grouting material parameters and hole spacing by indoor grouting material tes-ting, field grouting testing and finite element numerical simulation and proposed the corresponding grouting con-trol standards. It is suggested that water - cement ratio should be 0.8 - 1.0,water glass about 40 Baume De-grees, water glass addition 8% - 10% and grouting hole spacing about 1.8 m when Water - soaked sand andcobble stratum adopted cement- water class to grout.
出处
《铁道科学与工程学报》
CAS
CSCD
北大核心
2016年第3期469-475,共7页
Journal of Railway Science and Engineering
基金
湖南省科技计划资助项目(2010GK3173)
中铁五局集团有限公司资助项目
关键词
富水砂卵石地层
注浆加固
水泥-水玻璃双液浆
注浆参数优化
Water - soaked sand and cobble stratum
grouting reinforcement
cement - sodium silicate slurry
parameter optimization of grouting
