Study On The Rules Of Settlement In Soft Soil Foundation And Technology Of Foundation Treatment In The Piedmont Alluvial

With the rapid development of traffic cause in our country, people’s requirements for traffic from the original simple can arrive at the destination gradually transformed into demanding traffic conditions comfort, safety, fast,economic and environmental protection. Disadvantages of two-way four lane highway the original construction in our country becomes more and more prominent because of people’s pursuit of quick and safe and comfortable. Thorny issues need to be resolved gradually exposed for in two-way four lane highway originally built because many facing extension. Settlement of foundation in soft soil area is an important factor to influence the quality of highway, especially for the extension. A technical problem in dire need of expressway construction in soft soil area is to solve the settlement prediction of foundation in soft soil area. Study on the technology of soft soil foundation treatment area is also a popular field now. This paper relies on Beijing to Shijiazhuang expressway extension project, the following work is done:(1) Summarizing some research achievements at domestic in soft foundation settlement prediction.Introduce the domestic and foreign research present situation of expressway extension.Analysis the important significance of expressway Beijing to Shijiazhuang, extension is now represent the general trend;(2) Analysis of engineering characteristics of soft soil and the distribution of soft soil in the engineering which based on;(3) Describes the current settlement prediction type and mechanism of various curve fitting;(4) CFG pile net composite foundation is simulated by means of PLAXIS software, and make a comparative analysis with the measured value.(5) Predict the settlement of the medium term by hyperbola method. Using the hyperbolic method, pearl curve method, exponential curve method to forecast the foundation settlement at later stage, and then compared with measured data, in order to find the optimal prediction method;(6)The effect of different foundation treatment methods were compared and studied.