【摘要】 对中国黄土山城“依山造居”的几个灾害问题（如黄土层地震反应、黄土滑坡、黄土沉陷、黄土泥流等）进行了分析，在此重点讨论黄土沉陷（包括湿陷与震陷）问题。根据大量的实验结果，分析了灌溉使黄土体的物理、力学性质发生变异的原因，并以兰州市皋兰山为例进行了现场浸水试验，求取了黄土山坡的自重湿陷量，同时又对黄土的震陷做了简略地描述。最后提出了灌溉、强降雨、地震所形成灾害链的防治对策。更多还原

【Abstract】 Some hazards,like loess seismic response,landslide,settlement and mud flow in city building along loess mountain in china,such as the cities of Lanzhou, Xining, Baoji,Tianshui and Yan’an,etc.are discussed.Based on the reference 1 and 2, the problem of loess settlement is studied which deal with loess collapse and seismic subsidence.According to a large number of loess physic and mechanic tests, loess dynamic test and field test permeameter,the property of loess is analysed. Finally, countermeasure of hazard prevention is submitted.更多还原