压力板仪配套及SWCC试验的若干问题探讨

Coordinated Ceremic Plate Extractors and Some Problems of SWCC Test

采用高压氮气瓶、压力控制箱及精密电子天平等器件，对从美国土壤水分仪器公司进口的压力板仪核心部件进行了配套完善。介绍了配套后的压力板仪土-水特征曲线测试系统的结构组成与特点，对土-水特征曲线（SWCC）试验过程中应注意的问题进行了剖析。用配套的压力板仪测定了宁夏原状自重湿陷性黄土、北京原状粉质粘土和小浪底防渗斜墙重塑黄土类壤土等3种土样的土-水特征曲线，并对试验结果进行了分析。

The kernel components of ceremic plate extractor imported from Soilmoisture Equipment Corp. of USA were coordinated by using the high -pressure nitrogen bottle, pressure -controlling box and exact electro balance. In the paper, the framework and characteristics of the coordinated SWCC testing system were introduced and some attentive problems during test process were analyzed. Then, SWCC tests were done on three sorts of soil： the original state loess collapsible under overburden pressure in Ningxia, the original state powdery clay in Beijing and the remold loess used in slanting wall on prevented seepage in Xiaolangdi Engineering. Meanwhile, some analytical results have been gained.