深层搅拌桩防渗墙在堤防加固中的应用及防渗效果分析  

Application and seepage control effectiveness analysis of deep mixing pile cutoff walls in levee reinforcement

作　　者：李聪磊 LI Conglei(Anhui Survey and Design Institute of Water Resources and Hydropower Co.,Ltd.,Hefei 230088,China)

机构地区：[1]安徽省水利水电勘测设计研究总院股份有限公司,安徽合肥230088

出　　处：《江淮水利科技》2024年第5期21-25,共5页Jianghuai Water Resources Science and Technology

摘　　要：渗透破坏是堤防常见险情之一,为分析深层搅拌桩防渗墙在堤防除险中的适用性,以安徽省淮河流域董峰湖行洪区董岗保庄圩堤防防渗加固工程为例,在对渗漏原因进行深入分析的基础上通过多种方案综合比较,选择多头小直径深层搅拌桩防渗墙进行防渗处理,并对成墙质量进行检测。采用二维稳定渗流有限单元法,通过对比进一步分析和探讨了防渗墙的防渗效果及渗流规律。结果表明:在董岗保庄圩多元浅层堤基中多头小直径深层搅拌桩防渗墙在成墙质量、技术条件、工程造价等方面都有明显优势,方案可行,技术可靠;半封闭式防渗墙处理效果理想,可作为该堤基首选渗控措施。研究成果可为沿淮行蓄洪区类似堤防的防渗加固提供参考。Seepage failure is one of the common hazards in levees.To analyze the applicability of deep mixing pile cutoff walls in levee hazard mitigation,this study used the seepage control and reinforcement project of the Donggang Baozhuang weir levee in the Dongfeng Lake floodplain area of the Huaihe River Basin,Anhui Province,as a case example.After a thorough analysis of the causes of leakage,multiple solutions were comprehensively compared,and a multi-head small-diameter deep mixing pile cutoff wall was selected for seepage treatment.The quality of the constructed wall was then tested.Using the two-dimensional stable seepage finite element method,the seepage control effect and seepage patterns of the cutoff wall were further analyzed and discussed through comparisons.The results showed that in the multi-layered shallow levee foundation of Donggang Baozhuang weir,the multi-head,small-diameter deep mixing pile cutoff wall had significant advantages in terms of wall quality,technical conditions,and project cost.The solution was feasible and technically reliable.The semi-enclosed cutoff wall treatment had ideal performance and could be considered as the preferred seepage control measure for the levee foundation.The research findings provided a reference for seepage reinforcement of similar levees in the Huaihe River flood control areas.

关 键 词：深层搅拌桩防渗墙 多头小直径 有限单元法 渗流计算 堤防加固 

分 类 号：TV871.2[水利工程—水利水电工程]