位错理论在西安地面沉降模拟中的应用

Computed Subsidence by Dislocation Model in Xi＇an City

摘要:

介绍了用位错理论研究地面变形的基本理论和方法。根据西安地面变形的地质模型,利用位错理论对西安市11条地裂缝活动与地面垂直变形的综合影响进行了数值模拟计算,并将计算结果与精密水准实测结果进行了对比分析。结果表明:位错理论模型数值模拟结果与实测的水准结果在空间分布具有很好的一致性。从理论上分析了西安地区的地面地面沉降除与抽取地下水,地面负荷等有关外,还与西安地区的地质构造特征有密切的关系。

Abstract:

The theory and method of dislocation model to compute ground surface deformation is introduced. Based on the geological model for ground deformation in Xi＇an city, the relationship between subsidence and 11 underground fissures is discussed and computed with dislocation model. Comparing the results of the calculation with the result obtained by leveling, it is showed that the result computed by dislocation model has the same characteristics as that obtained by leveling in space distribution. It is considered that the subsidence have relation not only with groundwater pumping and surface loading, but also with tectonics of Xi＇an region.