Research on the Design of Anti-Slip Pile Support for Complex Slopes Based on In-Situ Stresses Boundary Conditions
The stability of complex slopes has always been one of the key research issues in the field of geotechnical engineering.There are many methods to improve the safety factor of complex slopes,among which the use of anti-slip pile support is one of the commonly used methods.Taken a complex slope of a highway in Anhui Province as the research object,in-situ stress tests were conducted on the rock and soil mass of the slope using the borehole stress relief method.The test results were used as boundary conditions for finite element analysis.Numerical analysis was conducted on the two working conditions of the slope before reinforcement and after reinforcement with anti-slip piles,and representative finite element analysis results were obtained.And the displacement results calculated by the finite element method were compared with the measured displacement.Analysis shows that slopes without anti-slip pile support can lead to dangerous situations that are not conducive to slope stability,such as excessive concentration of local stress,large overall deformation and horizontal displacement,and the continuity of plastic zones.After the use of anti-slip pile support,the run-through of the plastic zone disappears,the deformation and displacement of the slope decrease,the stress distribution tends to be uniform,and the safety factor greatly improves.The displacement results calculated by the finite element method are very close to the measured displacement,with a good fit,indicative of the reliability of the finite element analysis method.
in-situ stressescomplex slopeanti-slip pilefinite element analysisreinforcementAnhui Province
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