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本文根据上海市区浅层土在近二十年来抽、灌水作用下的变形规律,采用优化方法分析了上海浅层土的变形模型并确定其计算参数;利用已有的上海地面沉降问题的弹性解答.采用推广的李氏比拟法,结合选定的横型,推导出了土体为粘弹性假设下的土层变形量的解答;把各年的流变参数作为一组随机变量,得到流变参数的统计规律,进而采用蒙特卡罗方法得出劳动公园及汽车二场两个标点浅层土变形量的统计规律;并将该统计规律应用于沉降预测,通过计算分析提出了减小地面沉降的措施.
In this paper, based on the deformation law of shallow soil in Shanghai in the past 20 years under the effect of pumping and irrigation, the deformation model of Shanghai shallow soil was analyzed by optimization method and the calculation parameters were determined. The elasticity of existing Shanghai land subsidence problem was used. Answer. Using the extended Lee’s comparison method, combined with the selected lateral form, a solution for soil deformation under the assumption of viscoelasticity is derived; the rheological parameters for each year are used as a set of random variables to obtain rheology. The statistical law of parameters, and then Monte Carlo method was used to obtain the statistical law of the deformation of shallow soil in two punctuation labor parks and two cars; this statistical rule was applied to the settlement prediction, and the ground settlement reduction was proposed through calculation and analysis. Measures.