软土动力排水固结的室内模型试验研究  

Indoor model test of dynamic drainage consolidation method of soft soil

作　　者：王安明[1] 李小根[1] 李彰明[2] 黄志全[1] 杨文龙[3] 

机构地区：[1]华北水利水电学院,郑州450011 [2]广东工业大学岩土工程技术开发中心,广州510640 [3]香港科技大学

出　　处：《岩土力学》2009年第6期1643-1648,共6页Rock and Soil Mechanics

基　　金：广东省自然科学基金项目资助(No.06021462);河南省高校杰出科研人才创新工程项目(HAIPURT;2005KYCX015);河南省教育厅科研基金项目(No.2007170004);华北水利水电学院高层次人才科研启动项目

摘　　要：以广州国际会展中心一期工程动力排水固结软基处理项目为工程背景进行了室内模型试验,重点观察和分析了插设塑料排水板过程中、全部夯击过程中及夯击完成后饱和软黏土内的孔压响应。结果表明,塑料排水板插设完毕时刻与各个位置孔压达到峰值时刻不同步,孔压增长体现出滞后性特点。夯击过程中,离夯击点越近,其孔压增长越快,孔压增长幅度也越大,达一定夯击击数后浅部孔压增长趋于平缓,而深部处全部夯击完毕后其孔压依然继续增加,但各个位置孔压消散情况基本一致。Combining with soft foundation treatment project with dynamic drainage consolidation method（DDCM） in Guangzhou International Convention and Exhibition Center, an indoor model test is designed according to in-situ construction process. Pore water pressure in saturated soft clay is measured when inserting plastic drainage boards during dynamic compaction and after compaction. The results show that the pore pressure at each location reaches its peak at different times after inserting plastic drainage boards completely. During impact process, the nearer a point is to the impact point, the faster and the greater the pressure increases; under a certain impact number, pore pressure at shallow location tends to increase very slowly; but pore pressure at deep location continues to increase after impacting completely, pore pressure at every location dissipates basically consistent.

关 键 词：动力排水固结 模型试验 孔隙水压力 

分 类 号：TU41[建筑科学—岩土工程]