Anti-slide Pile And Anchor Bolt’s Mechanical Properties Research And The Engineering Application Of Railway Slope

Slope stability is always the key point of the research of slope, in order to enhance its stability, usually take various reinforcement measures. In this paper, based on the actual project, adopt the indoor model test and MIDAS GTS integrated research based on the infinite element numerical analysis.First of all, the selection of indoor model test with and without slide-resistant pile in the experiments of two groups of slope slide-resistant pile, applied thrust force through the slope,to measure the earth pressure and displacement of the slope, the displacement and stress of slide-resistant pile, at the same time displacement measuring thrust plate. Through model test, the different location of pile body is affected by the boundary effect degree is different, the slope of the lateral displacement of pile significantly greater than the inside. And slide-resistant pile significantly enhances the ultimate strength of slope, under 13.5 KN load, a pile slope completely destroyed, under 10.5 KN load, no pile slope completely destroyed, under 9 KN load, a pile slope and no pile slope began to appear initial shear failure, all these show that slide-resistant pile can’t improve the inherent strength of slope soil. In the vertical direction, regardless of the slope’s slide-resistant pile, the ultimate stress value of the slope soil are more close to the critical slip surface, the ultimate stress value is larger. And regardless of the slope’s slide-resistant pile, the ultimate stress value of the slope’s distribution are the same in the vertical direction. with and without slide-resistant pile of the slope’s the shear failure phenomenon appears in different position, the slide-resistant pile back appear obvious drumlin phenomenon, and no slope anti-slide pile’s drumlin phenomenon appear in the intersection of roadbed and slope.Secondly, the paper based on practical engineering using finite element software MIDAS- GTS to study of numerical simulation. And we measure the earth pressure and displacement of the slope, the displacements and stress and bending moment of slide-resistant pile, the displacement and stress of anchor bar. Due to the soil itself has anisotropy, so in the same location, the vertical displacement of the soil is bigger than the horizontal displacement of the soil. From top to bottom, the vertical displacement of slope soil show declined trend. From the intersection of roadbed and slope to the back of the slope, the vertical displacement of slope soil show increasing trend. Displacement of slide-resistant pile also presents a certain regularity. From top to bottom, inside and outside a slide-resistant pile’s horizontal displacement all show declined trend, At the bottom of the pile maximum horizontal displacement occurs. Slide-resistant pile’s midpoint as the critical point, the upper part horizontal displacement of the lateral slide-resistant pile is greater than the inside pile, in the lower part, the lateral and inside slide-resistant pile’s horizontal displacement are all the same, so we can see boundary effect is larger effect on the lateral pile. In the aspect of pile’s stress, from top to bottom, the inside and outside pile’s axial stress trend are the same, it’s all increased first and then decreased, and the inside slide-resistant pile’s axial stress is greater than the lateral pile. From top to bottom, upper anchor bar’s displacement significantly greater than the lower anchor bar’s displacement. For the same position of the anchor bar, from top to bottom, displacement showed increasing trend, the inside of the anchor bar and lateral anchor bar’s displacement curve are almost the same. On the axial stress of anchor bar, the inside of the anchor bar and lateral all showed a trend of first increase and then decrease, on top of the anchor bar reaches maximum normal stress, at the bottom of the anchor bar reaches maximum negative stress.Finally, through the comprehensive analysis, we can see that slope reinforcement structures such as anti-slide pile, improving the ultimate strength of the slope, but they cannot improve the slope’s inherent strength. The intersection of roadbed and slope is starting point which is dangerous slipping surface’s, supporting structure should try to support to the dangerous slipping interface.