陕南膨胀土及其滑坡灾害研究

膨胀土在陕南汉江流域的汉中盆地、西乡盆地及安康盆地分布广泛，其面积约达1300km2，占汉江流域中3个盆地面积的1/2以上. 由于膨胀土土体的胀缩变形和土体结构变异，导致滑坡灾害广泛发育，致使工程建筑和农田破坏，给国家和人民造成了巨大的经济损失，因此，研究陕南膨胀土及其滑坡灾害，不论在理论和实践等方面，对陕南的经济建设都具有十分重要的意义.

Research on Expansive soil and Its Landslide Hazard in the South Shaanxi

Expansive soil is widely distrubuted in Hanzhong basin, Xixiang basin and An'kang basin in Hanjiang stainage area.Its area is almost 1300km2,above one second of the total area of the three basins. Because of its swell-shrinking deformation and texture variation, Landslide hazared is widely developed in the area which destructed engineering constructions and farmming land and led to a great economic loss of govement and people. So both theoretically and practivally, reaseach on expansive soil and its landlide hazard has very important significence in the economic construction in this area. This paper gave a advanced discussion of expansive soil in the South Shaanxi in the aspects of its material composition, physical-chemical characteristics, engineering geological properties and the regularities of its landslide development.