Analysis On Horizontal Bearing Capacity Of Pile Foundation On Silt Slope Of Yellow River Area

In most parts of China,residential housing and urban infrastructure are generally built on a better geographical conditions on the ground.However,with the rapid development of the national economy,especially since the implementation of the western development strategy in the remote southwest mountainous areas,in order to adapt to the needs of urban construction at the same time without destroying the mountain ecological environment,reducing the slope of large-scale transformation,construction pile foundation,municipal pile foundation and so on need to be built on inclined slope.The bearing characteristics of pile on slope are obviously different from the bearing characteristics of pile in horizontal ground.The horizontal static load model test was carried out by using the self-developed test equipment,which the silty soil was used as the model of the soil on the slope.The finite element analysis software ABAQUS was used to simulate the bearing behavior of the pile on the slope,and the calculated results were in good agreement with the test results.At present,there are few theoretical and experimental studies on slope piles at home and abroad.Based on the indoor scale model test and ABAQUS finite element analysis,the bearing characteristics of the silt piles on the slope in the Yellow River are discussed and analyzed in order to improve the theoretical and experimental study of the pile under the complex load.Research shows:1.Pressure resulted of the asymmetry of the earth makes the pile on the slope produce horizontal earth pressure and produce horizontal displacement.The vertical load applied to the top of the pile causes the additional bending moment,resulting in a further increase of horizontal displacement.2.The existence of the moment load on the slope of the pile has a certain horizontal lateral displacement of the pile,which obviously reduces the horizontal ultimate bearing capacity of the pile.3.The section of the maximum bending moment of the pile is 6 times the diameter of the pile awaay from the top of the pile,which gradually moved down with the increase of the horizontal load.The influence of the moment is about 22 times the diameter of the pile.4.different slope slope pile soil loss is different,making the pile side friction and pile vertical ultimate bearing capacity is different.In the case of other conditions remain unchanged,the higher the slope gradient,the vertical ultimate bearing capacity of the pile on the slope shows a decreasing trend.5.The asymmetry of the soil around the pile makes the pile around the soil to produce a certain horizontal thrust of the slope pile,and with the increase of the slope,the greater the horizontal thrust of the pile.6.The maximum bending moment of the pile on the slope is approximately 6 times the diameter of the pile away from the top of the pile,and the moment below this section is gradually reduced to zero.As the slope of the slope increases,the maximum bending moment of the pile increases with the increase of angel of the slope.In engineering practice,it is advisable to strengthen the setting of the reinforcement at the cross section of the pile about 6 times diameter away from the top of the pile to improve the horizontal bearing capacity of the pile.7.The pressure of the soil around the pile gradually increased to the maximum,and then gradually reduced to zero,with the slope gradient increases,the soil pressure tends to decrease.8.By analyzing the influence of the location of the single pile on the slope,the slope of the pile on the slope is farther away from the pile top,the subsidence of the pile is smaller and the vertical bearing capacity is smaller.