高含水率黏土表层基质吸力的滤纸法测试

在围海造陆工程中，由于施工成本等原因需要改进密封模式，用淤泥代替泥沙。但由于泥土的开裂性质，易出现密封失效结果，因而需要对淤泥（高含水率土）的开裂性质进行研究。滤纸法测定土中吸力是一种简单有效的试验方法，用接触法可以间接得出土中的基质吸力，而土中的基质吸力是引发土体开裂的重要因素，对于研究无砂真空预压和土中的开裂有着重要帮助，文中在以往滤纸法的基础上对其进行了改进，使其更为简便。试验结果对该方法的准确性、不同厚度土表层的基质吸力、不同厚度土中导致开裂的基质吸力分别进行了推算，很好地印证了较厚土层对于开裂的迟缓反应。

Surface matrix suction test based on the filer paper method for the high water content clay

It is necessary to replace the sand with the slurry because of the economic cost in the coastal reclamation project. However, the cracking of the slurry （the high water content clay） should be studied, because the cracking easily lead to seal failure. It is convenient and effective to test the suction using the filer paper method in the soil and the contacting method can gain the matrix suction indirectly, while the matrix suction is important for the crack in the soil so that we can study the cracking soil in-depth and no-sand cushion vacuum preloading, and the paper improve the method to adjust this test. The re- sult of test is about the error, the surface matrix suctions for the varies thickness of the clay, the surface matrix suctions for the varies thickness of the clay when the clay crack, and we prove that the more thicker about the soil , the smaller the cracking.