富水圆砾层地铁车站深基坑周边土体防渗加固技术*
欧孝夺1,2,3李胜1钟有信4胡盛斌4,5江杰1,2,3
Technology of Soil Seepage Prevention and Reinforcement around Metro Station Deep Foundation Pit in Water-rich Round Gravel Stratum
OU XiaoduoLI ShengZHONG YouxinHU ShengbinJIANG Jie
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作者信息:1.广西大学土木建筑工程学院， 530004， 南宁；
2.工程防灾与结构安全重点实验室， 530004， 南宁；
3.广西金属尾矿安全防控工程技术研究中心， 530004， 南宁；
4. 南宁轨道交通集团有限责任公司， 530029， 南宁；
5.华南理工大学土木与交通学院， 510641， 广州
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Affiliation:College of Civil Engineering and Architecture, Guangxi University, 530004, Nanning, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2020.09.038
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中图分类号/CLCN:TU472; U231.4
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栏目/Col:施工技术
摘要:
针对富水圆砾地质条件下，土体注浆加固效果较差、造价较高的问题，采用声纳渗流检测技术，通过测量地下水流速、流向、流量和渗透系数等数据，利用三维可视化图像确定渗漏通道指导施工，采取有针对性的防渗加固土体措施。同时结合土层特性，调整袖阀管注浆成分和灌浆长度，实现精准加固。
Abstracts:
Targeting at problems of poor grouting reinforcement effect and high construction cost in water-rich round gravel stratum conditions, the sonar seepage detection technology is adopted. By measuring the groundwater flow velocity, direction, volume and the coefficient of permeability, 3D visualization image is used to guide the construction by determining the leakage channel, and targeted anti-seepage soil reinforcement measures are adopted. At the same time, combined with the characteristics of soil layer, the sleeve valve pipe grouting composition and grouting length are adjusted to achieve accurate reinforcement.
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