Mechanical Behavior Analysis Of Anti-sliding Pile And Gravity Retaining Wall Joint Supporting Structure

Because of the good performance and low cost, anti-sliding pile and gravityretaining wall are supporting structures widely used in projects. As anti-sliding pileand gravity retaining wall used as joint supporting structures for the governance of theslope, their mechanical characteristics may not be the same as they exist alone. Themechanical characteristics of the supporting structure of this kind is highly correlatedwith the law of soil lateral force distribution on the anti-sliding pile and gravityretaining wall. And the soil lateral force distribution depends on soil arching effectbetween anti-sliding piles. Therefore, research on this kind of supporting structureboils down to the anti-sliding pile soil arching effect and calculation of earth pressureon retaining wall. Combined with the engineering practice, in both theoretical andnumerical ways, this paper analyzes the mechanical characteristics of the jointretaining structure of anti-slide pile and gravity retaining wall.Main research work was carried out as follows:(1)Based on the improved computational formula of soil arching, this thesisconformes the arch axis equation of the arch and obtains the computational formula offront points when the arches exposed to different critical collapse states. Meanwhile,on the basis of soil arching theory, the thesis confirms the shape of horizontal crosssection surfaces of the slippery crack body. Then assuming that the horizontal slipsurfaces of soils were log-spiral surface, the3D shape of slippery crack body has beenobtained.(2)Taking space soil pressure into account, this thesis adopts thin-layer elementmethod to attain the3D soil pressure computational formula of the slippery crackbody when taking the slope gradient into consideration. Based on this, this thesis alsopromotes a simplized method to calculate the soil pressure of the slippery crack body.(3)It also sets up the two-dimension analytical model with FLAC3D numericalsimulation software, which helps to analyze the stress mechanism, Development lawand failure condition of the anti-slide pile soil arch. And it discusses the impact of thechange of various parameters as well, on the friction soil arch, direct soil arch andbefore loading the influence of soil loading ratio before pile.(4)Constructing a three dimensional numerical model, the thesis adopts twoconditions to simulate in two kinds of engineering practice cases both in rain and norain. And this helps to analyze the horizontal and vertical distribution law of the lateral force in both anti-slide pile and retaining wall in the joint retaining structure ofanti-slide pile and gravity retaining wall.(5) Related to the engineering practice case, this thesis futher explores thefailure model and the mechanical characteristics of the joint supporting structures ofanti-slide pile and gravity retaining wall. With the help of existing theories, the thesisobtains the computation results under the conditions of normal soil parameters andreduced Soil parameters, and quantitatively analyzes the stress of the retainingstructures system.