Load-bearing Mechanism Model Test for Bridge Pile Foundation in High-steep Transverse Slope

With the site project as the prototype,indoor model of load-bearing test was designed for three kinds of bridge pile foundations in the high-steep transverse slope which was 45°,60° and 75° respectively.Through the monitoring of the top displacement of pile,internal force of pile body and soil pressure around the pile,the load transferring law,the distribution law of the internal force and the soil pressure around pile under the vertical and horizontal load were studied.The results show that the pile bearing capacity under the vertical load consists of the friction around pile and the resistance of pile tip,but the friction around the pile which is close to free face is transferred more deeply because of the free face,and the effect increases with the angle of slope increasing.The horizontal displacement of pile top under the horizontal load increases with the angle of slope increasing,but the distribution law of its internal force is the same as that of pile foundation in the ground,which means that there are maximum bending moment and inflection point,but the maximum bending moment increases significantly with the angle of slope increasing,and the position of inflection point descends slightly with the angle of slope increasing.In different cases of load and angle of slope,the soil pressure of the back pile increases first and then decreases,but the soil resistance of the front pile decreases gradually with the depth.