Study Of Soil Arching Effects Of Sheet-pile Wall And Appropriate Space Between Piles

Sheet-pile retaining wall develops from anti-slide pile. When cantilevered anti-slide pile is used to support roadbed slope, the retaining structure has to be chosen, and if sheets are hung between piles, it is called sheet-pile wall. Sheet-pile retaining wall can be used to support cut slope and embankment in normal areas, inundated areas and earthquake areas, as well as landslide areas.As an effective measure in landslide treatment in engineering, anti-slide pile plays a significant role in world landslide control. According to statistics, anti-slide piles are the mostly used engineering structures in landslide treatment. The frequently used internal force method of anti-slide method, takes landslide and anti-slide piles into count respectively, and simplifies interaction of piles with soil as the common force interaction without considering the deformation and stress correspond between landslide and piles.Actually, soil arching effects between anti-slide piles, as the main mode of interaction of piles with soil, directly determine whether anti-slide piles can play their anti-slide and support roles. In this thesis, the author has studied soil arching effects between anti-slide piles from theoretical analysis, physical model experiment (geotechnical centrifuge model test) to numerical simulation. Based on other researchers' results, author's main work is as follows:I.Based on the model of M.M. Promojiyfakonov unloading arch, the mechanics model of soil arch between anti-slides pile is built, and its stress analysis is done. The result is that the soil arching effects become stronger with the angle of internal friction and cohesion growing and the space between two adjacent piles shortened. II.The soil arching effects are studied by utilization of geotechnical centrifuge model test, as well as the influence of space between piles. And the author draw out conclusion that the soil arching effects become weaker and the landslide is more unsteady with the space between piles growing.III.In geotechnical centrifuge model test, "deformation of retaining sheet being equal" principle is put forward, i.e. when the identical retaining sheets are used in centrifuge model test and actual projects, their loads should be equal if their deformation is equal. IV.By making use of the finite difference software FLAC^3D2.1, the main factors that affect anti-slide piles' soil arching effects are simulated and analyzed, and the following...