黄土地区城市的震陷灾害

本文根据黄土场地具有震陷性的研究结果提出了目前还未被人们引起注意的特殊灾害,即在地震作用下黄土场地上的城市将产生严重的地基失效事件。由于震陷的突然发生和它普遍带有不均匀性,将导致一般工业与民用建筑在振动和地基残余变形的共同影响下加重震害。常见的震害现象是建筑物开裂、倾斜和倒塌。本文以兰州为例,说明了黄土引起的震害将是一种不可低估的严重灾害,应引起工程界和城市建设部门的重视,研究黄土震陷对建筑物的影响,采取相应的防御措施,以减轻或避免震陷灾害带来的损失。

SESMIC SUBSIDENCE DISASTER ON SITE OF CITIES IN LOESS AREA

Based on the research of loess being of the property of seismic subsidence, this paper pointed out a type of particular disaster that people has not pay attention to, yet, which is that serious accidents of ground losing efficacy will happen in cities on loess sites under the effct of earthquakes. Because of seimic subidence occurring suddenly and distributing inhomogenously generally,the seismic damage of common industrial civil buildings become more serious under the effct of shaking and residual deformation of ground together. Usual phenomena of the seismic damage are cracking, slopping and Collapsing of buildings. To take Lanzhou as an example, the disaster induced by loess seismic subsidence are proved to be serious disaster which can not be underestimated. The engineering field and the department of city construction Should think highly of it, studying the effect of loess seismic subsidence on buildings,taking appropriate prevention measures and lessening or avoiding the loss caused by the disaster of seismic subsidence.