Study On The Application Of Embedded Pile-slab Structure Subgrade

The strength 、 stability and settlement of subgrade are important to the High-speed Railway and Passenger-delicated Railway. Pile-plank embankment is a kind of new-type of ballastless track in High-speed Railway, owing a lot of advantages. Its strength and rigidity are big and it can reduce the settlement of subgrade. It has been applicated widely in country and abroad. But the theory study of it is less than its application. The working mechanization and deformation behavior of it have not been ensured. And the completed design theory and design method have not been ensured.This paper studied the application of embedded pile-slab structure subgrade based on the pile-slab structure subgrade engineering of Baolan Passenger-delicated Line in area of collapsible loess. And analysised the settlement deformation and stress character of embedded pile-slab structure subgrade by consulting and summarizing relevance literature and numerical analysis. Based on above study, considering the influence of the length,the diameter of pile and the thickness of slab to the embedded pile-slab structure subgrade, conducted the under work:(1)Summarized the design theory and method of pile-slab structure subgrade and analysed the problems of it.(2)Based on the pile-slab structure subgrade engineering of Baolan Passenger-delicated Line in area of collapsible loess, calculated the subgrade of different design parameters(the length and diameter of pile and the thickness of slab). And studied the influence of parameters to the settlement deformation of the subgrade. The influence parameters of the subgrade settlement deformation are the length、the diameter and the lengthways space of pile.(3)Based on the pile-slab structure subgrade engineering of Baolan Passenger-delicated Line, studied the settlement character of pile-slab structure subgrade and the stress and deformation of it.