The Ground And Building Settlement Analysis Caused By Pit Precipitation

With the rapid development of our national economy and urban construction, more and more high-altitude and underground space resources have been explored,the excavation of deep foundation involves in pitprecipitation problems,which induces the uneven settlement of the surrounding earth surface.Specification provides the computing method of foundation settlement,but no corresponding formulas for the settlement of earth surface and buildings caused by the pumping appears,either clear quantitative analysis of the measurement for the compression depth under the infiltrating curve.The first chapter mainly from the ground precipitation, field monitoring, settlement calculation about foundation be concise and to the point:Calculation of precipitation and the research status at home and abroad. We can see in the field monitoring and finite element numerical analysis of settlement of many scholars have done a lot of work, but in the analytic solution and there is not a complete theory. This paper presents an analytical calculation basis for estimating, enabling the engineering staff at before pumping energy estimation due to pumping of ground and building settlement, avoid loss and harm to the engineerinj project.The second chapter introduces the compression of soil microstructure analysis and the common methods of foundation pit precipitation and applicable condition, elaborated on this foundation in the case of precipitation mechanism of ground subsidence, and then reviews the foundation settlement of commonly used stratified summation method, standard method, finally this paper introduces a definition of natural soil compression modulus to simplify the thickness of stratification in the method, the method reduces the computation process, not lose accuracy. The third chapter describes in detail how to solve dewatering causing ground and building settlement calculation, the formula is the innovation point of the thesis. This chapter first gives the calculation point position of initial stress is calculated, and then determining the infiltration curve above water level changes applied to the soil additional stress in soil mechanics, and the use of triangular load knowledge determines the resulting infiltration curve following additional stress, most are caused by pumping of ground and buildings settlement calculation formula, and through the actual engineering example of monitoring the accuracy of the formula is verified.Many scholars through the finite element analysis method to analysis of various parameters on the settlement caused by impact analysis, this chapter through the use of the previous chapter theory by using the analytical method to analysis proof some beneficial experience of engineering, the engineering experience can be used for practical engineering use.Finally, summarizes the main work of this paper, aiming at the shortage, put forward several points for continuing research direction to improve the deficiency of the thesis.