Study On Treatment Effect And Evaluation Technology Of Lacustrine Soft Soil Foundation Of Expressway

After decades of development of our country’s expressways,the focus of its development and construction has gradually shifted from a simple,quick and convenient purpose in the initial period to a freeway that takes safety,comfort and environmental protection into consideration on a fast basis.In recent years,with the rapid economic development in our country and the continuous improvement of society,the number of car ownership in China has been rapidly increasing.People’s travel patterns are also changing.From a single type of traveling by public transport to a car-based mode of travel.Because of its fast,convenient highway,the highway has become the choice of more people traveling.With the people’s increasing demand for the expressway,the road network continues to expand and improve,many problems in the construction and maintenance surfaced,especially the expressway built on soft soil foundation,the settlement of the foundation has become a problem that restricts the expressway speed One of the factors of development.In order to meet people’s increasing demand for the quality and service of expressways,it is an urgent issue to ensure the quickness and comfort of expressways and the settlement of soft ground in expressways.This article relies on Xing Heng Expressway Phase II project,the following work:(1)The classification and characteristics of soft soil are briefly introduced.The status quo of the research on the foundation treatment of soft soil foundation at home and abroad is introduced.(2)Summarize the general situation of project of XINGHENG second phase project,monitoring plan of settlement data at construction site,and introduce a variety of freeway settlement forecasting methods;(3)Predict the final settlement of the measured settlement data by different subsidence prediction methods,predict the final settlement of the measured subsidence data,and use the preloading,preloading,drainage preloading,cement-soil mixing pile composite foundation,Composite foundation and CFG pile composite foundation treatment methods of five kinds of ground treatment effects were analyzed and compared;(4)The PLAXIS finite element software is used to simulate the CFG pile composite foundation construction process and settlement development,and the influence of CFG pile composite foundation on the foundation settlement under different conditions is comparatively analyzed.At the same time,Compound foundation construction program optimization research.