Settlement Analysis Of Road-bridge Transition Section And High-pressure Jet Grouting Method

In recent years,with the healthy and rapid development of China’s economy,China’s expressway construction has grown rapidly.Comfortable and convenient has become the biggest advantage of the highway,but from the already completed and operating the use of expressway,the road and bridge transition section of the uneven settlement and the resulting bridge jumping phenomenon is widespread,the bridge jumping disease is not only serious affect traffic safety and comfort,it also become a major problem restricting the development of expressway.This paper analyzes and summarizes the causes of the uneven settlement of the transitional section of the road and bridge through the in-depth investigation of the transition section of the road and bridge of Yangwu Expressway.On the basis of the above,with reference to the relevant research results at home and abroad,and taking the treatment project of the transition section of the road and bridge of Yangwu Expressway as the background,it is proposed to use high pressure jet grouting technology to deal with the transition period of expressway between highway and highway uniform settlement disease problems,the specific content includes the following aspects:(1)Analyze and summarize the research results of the existing road and bridge transitional settlement technology,combined with the climate and geological conditions of Yang-five expressway,put forward the use of high-pressure jet grouting technology to control the uneven settlement of the disease.(2)The mechanism of the action of high pressure jet grouting technique on soil reinforcement is analyzed and studied.(3)A finite element analysis software MIDAS / GTS was used to establish the three-dimensional finite element model.The present situation of the transition section of road and bridge between K419 + 280 of Yangwu expressway was simulated and analyzed,and the development rule of uneven settlement of road and bridge transition section was summarized.(4)The effect of high-pressure jet grouting pile on the uneven settlement of the transition section of the road and bridge is calculated and analyzed.The optimization scheme of the high-pressure jet grouting pile in the uneven settlement of the transition zone is proposed.