大厚度饱和砂土液化治理试验研究  

Experimental research on control liquefaction of saturated sand with large-thickness

作　　者：杨生彬[1] 刘志伟[1] 李灿[1] 

机构地区：[1]西北电力设计院,西安710032

出　　处：《岩土力学》2009年第S2期430-433,共4页Rock and Soil Mechanics

摘　　要：饱和砂土液化地基治理是工程建设中面临的一大难题。某拟建电厂工程针对大厚度的饱和砂土液化地基,通过采用大直径振冲碎石桩复合地基的处理方法,开展了大厚度饱和砂土液化地基治理的现场试验研究。试桩施工结束后,通过采用载荷试验、超重型动力触探试验等原位测试方法,对桩间土、桩体及复合地基的承载性能、变形参数及液化处理效果进行了评价和分析,取得了大量可靠的试验数据,对类似工程具有一定的参考价值。Liquefaction of saturated sand is a major problem in engineering.The large-diameter gravel piles with vibroflotation are used to control the liquefaction of large-thickness saturated sand of a proposed power plant project,and many field test studies are carried out.After finishing the construction of the test piles,a lot of in-situ tests including plate loading test,ultra-heavy dynamic penetration test,etc.,are used to evaluate the bearing capacity of soil between piles,piles and composite foundation,to test the deformation parameters,and to evaluate the controlling effects of liquefaction.A large number of reliable experimental data are obtained,which are valuable for similar projects.

关 键 词：饱和砂土 液化 振冲碎石桩 复合地基 

分 类 号：TU441[建筑科学—岩土工程]