The Model Test Study Of Earth Fill Foundation Pit Of Changsha XingDian Apartment

According to the theory and method of model test, based on the background of Changsha XingDian apartment earth fill foundation pit project regarding prototype, by the similar model test of this prototype, this paper studies on the earth fill destruction mode, function mechanism of soil nail in this kind of geological body and some on the condition of in supporting, non-supporting, rainfall, non-rainfall conditions. Some regularity factors are revealed, valuable guide and reference in theory for design and construction in earth fill reinforce project are offered.The main conclusions are shown as follows:Firstly, similar relational expression on prototype and models are set up. It can carry on the corresponding design and study to the actual project prototype and this result can actually or approximately reproduce the transmutation and destruction of the prototype.By studying, prototype earth fill slippery to move surface and critical height of steady advantage are defined.This paper analyzes job state of soil nail support system in the earth fill body in physically displacement characteristics of soil, strength characteristic distribute law of soil nail, strength characteristic distribute law of out layer of concert and so on, andreveals the function mechanism of soil nailing in earth flll body.This paper analyzes the influences of rainfall on soil nail support system, and reveals stabilization characteristics of earth fill prototype body in supporting or non supporting not related to the conditions of rainfall but be controlled by velocity increment of bulging and its critical value.Finally, on the basis of these, this paper analyzes and studies some supporting parameters about influencing effect to supporting, and further brings up advice to the popularizations of project by studying conclusions.