The Study on Mathematical Model of Urban Land Subsidence Based on Statistical Analysis

This paper analyzes the main reasons which cause urban land subsidence, and discusses the mechanisms of the effects caused by building loading and the change of groundwater level. Using the theory of statistical analysis, mathematical model of land subsidence is built, and the effect of the model is also validated by practical data. The analysis results show the fitting effect is good and the model has highly practical value. Urban land subsidence is a common and growing geological phenomena, and a chronic caused by accumulating day by day. It is closely related with urban engineering construction and residents' lives and production activities, and it has characteristics such as generating slowly, large seat of settlement, complex genetic mechanism, no significant influence initially, great difficulty in prevention and treatment, etc. At present, the problem of land subsidence is very serious in America, Japan, Mexico and Italy, and many cities in China are also suffering form it. Therefore, land subsidence has become an important research subject now in the whole world. In China, with the faster development of urbanization, the gradually conspicuous damages of land subsidence seriously disturb the normal development of urban engineering construction and daily life of inhabitants. Land subsidence is one of the most common geologic hazards in our plain region, and the characteristics of it determine its great harm. Besides, land subsidence is a slow process which will be ignored easily. If we don't pay attention to it and don't make renovating and developing shoulder to shoulder, it will very hard for us to make up for the outcome brought about by settlement. To analyze and forecast the status of land subsidence scientifically, accurately and duly is particularly important to the sustainable urban development. For this reason, building an effective mathematical model of land subsidence has become an urgent task. Land subsidence monitoring is pre-requisite during the management of land subsidence, and it is an important mean to protect people's lives and property, reduce economic loss and evaluate urban development. The analysis of monitoring data provide scientific basis for evaluating urban environment geology. Therefore, with the urban development, land subsidence must be monitored in real time to collect first- hand information which will be analyzed scientifically to discover the potential safety hazard of surface. And this is beneficial for government to draw up control measures and ensure the process of urban modernization.