The Research On The Characteristics Of Ground Settlement And Deformation In Shanghai

The ground settlement of Shanghai is a geological environmental problem caused by the economic development, mainly by the exploring the underground water. As a one of the biggest international commercial city, the possibility of the continuable development of Shanghai depends on a good geological environment, so the existence of the ground settlement in Shanghai will be an important factor, which affects and restricts its economic developments. Due to the previous achievements, which have been used as a standard for studying, preventing and curing ground settlement in other areas, enhancing the study on the ground settlement of Shanghai, consummating and improving the existing theory will be helpful to the prevention and cure of the ground settlement hazard all over our country.According to the current problems in this field, This paper will do some research on following aspects:1. Taking the factor of ground settlement for exploring different ground water-bearing layers into account, a new viewpoint, the deep water-bearing exploration affects the ground settlement much more than the shallow, is put forward, and think that exploring the deep water-bearing layer can not be used as an efficient method to prevent and cure ground settlement.2. Using mathematic and physical statistics and regression analysis of observed deformation data, stress-strain model for the rheological deformation of soft clay was established, and the regression equation for the rheological deformation was obtained. The model and regression equation can be used to predict the development of rheological deformation.3. Based on the characteristics of development of the ground settlement and the analysis of the regional settlement in Shanghai, the exploring 4th deep water-bearing layer is considered as the key factor causing the regional ground settlement in Shanghai.4. According to the characteristics of the ground settlement, the hazard caused by the ground settlement was evaluated, and partitioning system was established. Meanwhile, some preventing and curing projects were evaluated so that we can reduce the loss caused by ground settlement much lower.