Embedded Anti-slide Pile Of Dynamic And Static Stability Analysis

The article takes certain tunnel slope engineering from Fengjie county ofChongqing to the Yunyang expressway as a background. A failure process and astructure stress characteristic of a buried antiskid supporting slope under the actionof dynamic force and static force are researched by adopting value analysis softwareFLAC. When a buried pile is compared with a full-length type antiskid pile, theadvantages and the disadvantages of the supporting performance of the buried pileare obtained. The buried antiskid pile is applied to actual engineering. The slopesupporting stability and the supporting effect of the buried antiskid pile subjected toslope supporting are checked according to displacement of a site soil body anddisplacement of a pile body as well as soil pressure monitored data. The article hasthe research on the following contents.First of all, a slope stability analysis method under the action of the static forceis concluded, and a finite element strength reduction method is introduced into afailure mechanism and stability analysis of the buried antiskid pile; the maincontents are that：1, the conventional method for analyzing the static stability of the current slopeis illustrated; importantly, the finite element strength reduction method and a slopeunstability judgment basis are discussed and are introduced into the stability analysisof the buried antiskid pile supporting slope;2, under the condition of static force, the failure process and the failuremechanism of the buried antiskid pile supporting slope are explored by the finiteelement strength reduction method, and the research shows that when the strength ofthe pile body is relatively high, the pile body difficultly fails by shearing; under thecondition of an ultimate state, due to the supporting and stopping action of theburied pile, final failure of a sliding body is overtopping failure instead of integratedfailure when the sliding body downwards slides;3, and the supporting performance and influence factors thereof of the buriedantiskid pile are researched; due to comparison with a stability coefficient and pilebody stress (such as bending moment and shearing force), the advantages and thedisadvantages of the previous support can be preliminarily obtained; furthermore,the factors, comprising the length of the pile body, different types of rigidity, apoisson ratio, an elastic modulus and the like, of the influence on the supporting performance of the buried pile under the action of static force are researched.Secondly, the slope stability analysis method under the action of dynamic forceis concluded; a finite element strength reduction complete dynamic analysis methodand a basis for judging dynamic failure are importantly discussed; the finite elementstrength reduction complete dynamic analysis method is introduced into analysis ofa dynamic failure mechanism and stability of the buried antiskid pile; the mainresults are that1, under the action of earthquake, the supporting performance of the buriedantiskid pile is compared with that of the full-length pile under the same dynamicworking condition by the finite element strength reduction complete dynamicanalysis method, so that the earthquake resistance performance of the buried antiskidpile can be researched;2, under the action of earthquake, a dynamic response of the slope has amagnifying effect; the position of a monitoring point of a slope surface is higher,and an acceleration and displacement magnifying effect is more obvious; theearthquake resistance performance of the buried antiskid pile is high; the structuredynamic stress and the engineering manufacturing cost are obviously lower thanthose of the conventional full-length antiskid pile;3, and at different moments of the earthquake, the stress on the pile body of theburied antiskid pile is continuously changed; the shearing force is in triangulardistribution at a sliding band; the bending moment is in parabolic distribution; theshearing force and the bending moment which are near to the intersection surface ofthe sliding band and base rock are close to maximum values.Finally, the supporting performance and the stability of the buried antiskid pilesupporting slope are researched according to site monitored data, and a monitoringresult shows that1, the horizontal displacement and the soil pressure monitored dataof the certain tunnel slope engineering, which adopts a buried antiskid pile support,from the Fengyang county to the Yunyang expressway on the spot are always stableunder the supporting of the slope; and the monitored data verify the effectiveness ofa supporting form, namely the buried antiskid pile; and2, the site monitored dataalso verify the credibility of a calculation result of the finite element strengthreduction method, so that the finite element strength reduction method can beapplicable to stability analysis of supporting slopes and can be popularized andapplied in the rock research field.