微劈裂管路真空预压法加固深淤土地基应用研究  

Application research of micro split pipeline vacuum preloading method in reinforcing deep silt soil foundation

作　　者：王南江[1] 冯英 翁佳兴 张礼强 

机构地区：[1]淮委治淮工程建设管理局,蚌埠233000 [2]淮河水利水电开发公司(驻蚌),蚌埠233000 [3]江苏鸿基水利建设工程有限公司,江苏扬州225000

出　　处：《江苏水利》2016年第9期1-4,8,共5页Jiangsu Water Resources

摘　　要：短期内解决深淤土地基的沉降不稳定问题,是河道堤防工程施工过程中经常遇到的难题。本研究介绍了微劈裂管路真空预压法在入江水道崇湾段堤基加固中的运用,通过在其南北凹两段布设真空度、地表沉降、地基承载力等监测设施,收集相关数据,并对监测数据进行了分析,结果表明该技术能有效降低上覆厚回填土层的影响,维持真空度在80～90kPa,增压工艺能够较为显著提高地基的加固效果,技术实施75 d实现地基平均固结度大于90%,并且不同深度的地基承载力均可以达到设计要求。Solving the setdement instability problem of the deep silt foundation in short term is a difficult problem during the construction of river embankment.The micro split pipeline vacuum preloading method used in the reinforcement of dike foundation of Chongwan section is introduced.The monitoring facilities are set up for collecting the data of vacuum degree,surface setdement and bearing capacity of foundation in the north and south concave.The monitoring data are analyzed.The results show that this technology can effectively reduce the influence of overlying thick backfill soil,maintain the vacuum degree in the 80～ 90 kPa.It can more significandy improve the reinforcement effect of foundation.The average consolidation degree of foundation is greater than 90% after technology implemented 75 days.The different depth of the foundation bearing capacity can meet the design requirements.

关 键 词：微劈裂管路 真空预压 堤基加固 

分 类 号：TU443[建筑科学—岩土工程]