Clarification of the mechanism generating salt disaster with geotechnical engineering and proposal of ground improvement resistant to salt disaster

盐害是引发盐害的一种灾害，它是由人为因素如过度灌溉和自然因素如长期反复的准备和蒸发造成的。因此，需要考虑对地面的复杂外部影响的对策。在这项研究中，我们开发了土壤/水/空气耦合F。E.模拟器，它可以表达地面变形，地下水流动，和地面内的质量转移。此外，还进行了蒸渗仪试验监测蒸发，以提高分析精度。最后提出了抗盐害的土壤分层。

Salt disaster, triggering salt disaster, is generated by man-made factor, such as exceeding irrigation, and natural factor, such as long-term repetition of preparation and evaporation. Therefore, the countermeasure considering complicated external impacts to the ground is needed. In this study, we developed the soil/water/air coupled F. E. simulator, which can express deformation of the ground, groundwater flow, and mass transfer within the ground. Moreover, monitoring of evaporation with lysimeter tests is conducted for improving analysis accuracy. Finally, the soil stratification resistant to salt disaster is proposed.