Study Of The Arching Effect In Soil Behind The Retaining Wall Under Non-limite State

With rapidly development of national economy in our country, a largenumber of engineering projects such as water conservancy engineering project,municipal engineering project, construction engineering project, roadengineering project, bridge engineering project are increasing vigorously. As animportant auxiliary engineering, retaining wall engineering is the most commonbasic engineering in our life. Obviously, it is very significant to study the rule ofthe soil pressure behind the retaining wall.It’s a common sense we know that the classical earth pressure calculationcannot be used for the actual engineering although it could obtain the value ofthe earth pressure behind the wall. In order to find a better solution to theapplication of the actual engineering, a new calculating method would be comeup with by using ANSYS software. For studying the relative displacement areaand the earth pressure behind the retaining wall, which considers the arching effect in the soil under the non-limited condition. It is important to use thecombination of the horizontal differential calculus analysis and the valueanalysis above.In this thesis, it shows that there is a relative displacement area behind theretaining wall when the wall moves. The displacement of the area is small whilekeeping a short distance of the area to the wall and the displacement of the areais big while keeping a long distance of the area to the wall. The soil in therelative displacement area has different settlements and displacements. The soilforce in the relative displacement area was delivered to another soil layer nearitself, and it became a arching in the soil. The relative displacement area seemsas a trapezoid and the scale of it expands larger when the distance of the wallmoves longer, the friction angle is increased and the modulus of elasticity isdecreased.At the same time, this paper also proves that the direction of the minorprincipal stress changes when the wall move or the friction angle in the soilincreases or the modulus of elasticity decreases. Large amounts of minorprincipal stress in the soil which behind the wall can become an arch curve. Thearch curve becomes smoothly when the wall moves or the friction angle in thesoil increases or the modulus of elasticity decreases.In the same way, based on the calculation in the manuscript, a new point ofview in the paper found that the active earth pressure value of the soil behindthe wall become small and the force point elevates when the wall moves or the friction angle in the soil increases or the modulus of elasticity decreases.In addition, in order to solve the problem that none of a method couldresolve for the active earth pressure in the soil behind the wall. A newcalculating method have been put into forward: it could calculate the activeearth pressures under arching effect in the soil behind the wall which is underthe non-limited condition, which was resolved effectively by combining thefinite element analysis and the horizontal layer analysis in the document.