真空预压条件下地下水位和出水量现场测试研究  

Field tests on groundwater level and yield of water under vacuum preloading

作　　者：周琦[1,2] 刘汉龙[1,2] 顾长存[1,2] 

机构地区：[1]河海大学岩土力学与堤坝工程教育部重点实验室,南京210098 [2]河海大学岩土工程科学研究所,南京210098

出　　处：《岩土力学》2009年第11期3435-3440,共6页Rock and Soil Mechanics

基　　金：国家自然科学基金资助项目(No.50379010)

摘　　要：为研究真空预压期间地下水位和出水量的变化规律,采用研发的新方法对地下水位和出水量开展了现场监测,并对测试结果进行了分析。分析结果表明,真空预压初期加固区内地下水位下降较快,之后处于相对稳定下降状态,停止抽真空后地下水位快速回升。在此期间,加固区外的地下水不断向加固区内渗流补给,形成了一个以加固区为中心一定范围的降水漏斗,直至加固区内外水位趋于动平衡为止。塑料排水板对真空预压条件下地下水位的变化影响显著。真空预压初期平均出水量较大,随后迅速减少并趋于稳定,加固区中央区域出水量要大于边缘区域出水量。Field tests on groundwater level and yield of water was carried out for researching the varying process of groundwater level and yield of water under vacuum preloading. It is concluded that the groundwater level descends rapidly at the beginning of vacuum preloading and then becomes relatively stable; it ascends rapidly after the end of vacuum preloading; there is groundwater recharge from the outside to the inside of the reinforced area during and after vacuum preloading, which forms a depression-cone, until the outside and inside groundwater level become balanceable in motion; the plastic drain has a great effect on the movement of groundwater; the average yield of water is large at the beginning of vacuum preloading and then decreases rapidly until it becomes stable; the average yield of water of the center area is larger than that of the margin area.

关 键 词：真空预压 地下水位 出水量 

分 类 号：TU470[建筑科学—结构工程]