摘要
西安地裂缝活动给市政建设带来了重大损失,严重地影响着人们的生活。本文在前人研究的基础上,采用静力位错理论对小寨地裂缝、边家村地裂缝和辛家庙地裂缝活动所产生的垂直位移进行了分析。同时,通过地裂缝活动使地基或基础的不均匀沉降超过极限时,建筑物就会出现裂缝,发生变形,危及建筑物的安全。根据不同工程地质性质的场地和不同结构的建筑物对最大差异沉降的要求,对地裂缝带进行了严重区、较严重区、轻微区的安全性分区。并依每区的标准对这三条地裂缝进行了成灾评估,从而明确了不同地裂缝的成灾程度。
The moving of Xi'an ground cracks has caused heavy losses to the city construction. Based on the static dislocation theory, this paper analyses the vertical displacement fields caused by Xiaozhai crack, Bianjiachun crack and Xinjiainiao crack. The analysis of the influence of ground crack moving on buildings shows that buildings will be fractured and deformed if the non-uniform fundament subsidence caused by the ground crack moving is over a certain limit. According to the fundament engineering geological properties, building's interior framework,and their stability to the maximum non-uniform subsidence, three disastric segments along the ground cracks are divided, i. e. , serious zone, sub-serious zone and gentle zone. The evaluation is made on the disaster degree of the above metioned three ground cracks,and the results can help understand the disaster degree of other different ground cracks.
关键词
土地
裂缝
灾害
评估
西安市位移场
Xi'an ground cracks, vertical displacement field.disaster segment, evaluation of disaster
