Xi'an University Of And Technology And Architecture Effect For Basis And Superstructure As Declining Cobblestone Substratum Foundation

In the construction of new campus of many colleges and universities in our country, a large number of buildings need to build in the ancient river foundation. declining Substratum foundation-superstructure-the basis of common action of a geotechnical engineering practice in the face of an important issue of practical significance. In this paper, the existing research on the subject, based on theoretical analysis and numerical simulation using the combination method, the tilt and the underlying layer of foundation and the foundation and superstructure of the role of further in-depth study, the following conclusions is the major work done and research:(1)Basis for the different types, the upper structure on the basis of Pebbles on the tilt and the underlying layer was studied. Calculation shows that, In the tilt cobblestone foundation underlying stratum, in order To reduce the displacement of the upper structure, reduce the upper structure of secondary stress, a variety of different types of the basis, use of shallow foundation (Independent base, bar base), numerical Analysis of practice has some meaning.1) Independent basis for the stress distribution, brick columns on the right side of the stress greater, right-column basis in the stress is relatively small. Layer along the sloping gravel underlying the foot of the direction to the top of the hill, right two basic on the stress of change is relatively large.(2)Basis for different situations of underlying layer for the strength of cobblestone and cobble substratum slope, the effect underlying stratum of the pebbles on the base and upper structure were studied, Calculation shows that:1)Underlying layer of pebbles at high intensity, foundation and superstructure of the horizontal and vertical displacements are smaller, foundation settlement, differential settlement and internal forces are smaller, in cobblestone underlying strength of the lower layer, the upper structure have higher secondary stress.2) When cobblestone Substratum slope is large, superstructure down to the cobblestone slope opposite direction forward. Gradient is small, when Situation is the opposite; Cobblestone Substratum slope more slowly, the smaller the basis of the average settlement,the forceis of cobblestone underlying layer the bottom of the foot of the column foundation office are greater, however, the internal forceis are smaller.