不同排水路径下饱和软黏土固结试验研究  

Study on the consolidation test of saturated soft clay under different drainage paths

作　　者：周文渊[1] 尹杰杰 方林 ZHOU Wenyuan;YIN Jiejie;FANG Lin(Anhui and Huaihe River Institute of Hydraulic Research,Hefei 230088,China;The Research Center of Water Resources and Hydropower Engineering Technology of Huaihe River Water Commission,Bengbu 233001,China;Anhui Gangkouwan Reservoir Management Bureau,Xuancheng 242000,China)

机构地区：[1]安徽省·水利部淮河水利委员会水利科学研究院,安徽合肥230088 [2]淮河水利委员会水利水电工程技术研究中心,安徽蚌埠233001 [3]安徽省港口湾水库灌区管理局,安徽宣城242000

出　　处：《江淮水利科技》2024年第6期12-16,共5页Jianghuai Water Resources Science and Technology

基　　金：安徽省·水利部淮河水利委员会水利科学研究院青年科技创新计划项目(KY202206)。

摘　　要：为研究不同固结压力和排水路径下试样的位移、孔压和固结系数变化规律,制备软黏土重塑试样,采用GDS固结系统开展了不同排水路径下的一系列固结试验。结果表明:随着固结压力的增加,径、竖向排水固结试样的最终变形量逐渐增加;径向排水固结时,试样的最大孔隙水压力值较竖向排水时略小,孔压消散的更快;竖向排水固结系数随固结压力的增加而略有增大,当固结压力较小时,增加趋势较明显,当固结压力大于一定值后,增加幅度趋于平缓;排水边界良好时,决定土体固结速率的是土体中水的渗流速度,受排水边界影响较小。In order to study the variation of displacement,pore pressure and consolidation coefficient of samples under different consolidation pressures and drainage paths.By using the GDS consolidation system,a series of consolidation tests are carried out under different drainage paths.The results indicated that with an increase in consolidation pressure,the final settlement of both horizontally and vertically drained consolidation specimens gradually increased.During radial drainage consolidation,the maximum pore water pressure of the specimen was slightly smaller than that of vertically drained consolidation,and pore pressure dissipated more quickly.The coefficient of consolidation for vertically drained specimens slightly increased with an increase in consolidation pressure.The increase was more pronounced when the consolidation pressure is relatively low,and it becomes more gradual after the consolidation pressure exceeds a certain value.When drainage boundaries are well-established,the rate of soil consolidation is determined by the permeation speed of water in the soil,with minimal influence from drainage boundaries.

关 键 词：软黏土 GDS固结试验系统 固结试验 孔隙水压力 固结系数 

分 类 号：TV16[水利工程]