Study On Settlement Prediction Of Soft Soil Foundation Based On Time Serises Analysis

With the rapid development of our country's economy,a large number of rural population into cities led to a shortage of urban land is more and more.A large number of civil and industrial buildings,high-rise buildings,and some have special requirements of building security problems.Our country is a large country,and the geological conditions of diversity,in recent years,some airports,silos,storage tanks,large steel construction have turned to the soft soil area with special geological environment.In soft soil area with special geological environment to build these structures to solve the first problem is the foundation settlement and the stability of the structure.With the development and utilization of soft soil area,soft soil problem has become the influence project quality,project cycle and project cost one of the key factors.Repeated loads affecting the strength and deformation of is one of the important mechanical properties of soil,how to determine the deformation of the foundation under long-term cyclic loading is one of the important research topic in civil engineering field.For structures built on soft soil foundation in construction was already on the corresponding foundation treatment,such as the surcharge preloading,cement mixing pile,sand compaction piles,etc.but for the foundation during use in cyclic loading(traffic load,the tank level and granary grain loading unloading caused by variable load)under the action of the settlement of foundation research rarely,so for soft soil foundation settlement prediction is particularly important.As is known to all,security and the economy are at the core of the two problems in engineering,but how to carry out accurate subsidence prediction,make the engineering construction safety under the premise of more economy that is the biggest problem to solve.For the prediction and analysis of the foundation settlement of is that there are both theoretical significance and practical value of the subject.Time series analysis method is that a scientific analysis method is widely applied.Because this method is simple to operate,at the same time can also regular quantitative speculate the future trend of the development of things,for the foundation settlement prediction has great practical value.By using time series analysis method(Eviews software)not only can predict the development trend of foundation settlement in advance for the construction of the late provides a scientific basis for selecting the rational construction scheme can also be based on the predicted results in advance to take effective measures to prevent accidents caused by foundation settlement project.In this paper,the process of writing mainly divided into the following several aspects:1.Refer to relevant literature analysis at home and abroad for the development of foundation settlement prediction,and deeply understand the function and application field of time series analysis method,familiar with the operation of time series analysis steps.2.The analysis of the deformation mechanism of foundation settlement,and introduces several kinds of commonly used prediction methods of foundation settlement and briefly expounds the advantages and disadvantages of these prediction methods and applicable conditions.3.According to the characteristics of the foundation settlement and combined with time series analysis method,choose relevant foundation settlement observation data through Eviews software to establish a suitable model to forecast the foundation settlement in the late,will detail in the specific operation method and parameters of the specific steps of the adjustment of the judgment.4.According to the final forecasting results contrast analysis of the advantages and disadvantages of the prediction method and measured values,and to establish the model of practical significance,and points out the shortcomings of this article and needs further improvements.