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通过在大截面钢筋混凝土抗滑桩身内绑扎PVC测斜管,监测抗滑桩的水平侧向位移。对于钢筋混凝土抗滑桩,视为埋于土内的弹性地基梁,根据文克勒假设,求得其弹性曲线微分方程,进而得出桩身特角、弯矩、剪力、桩前抗力等;对于钢筋砼抗滑桩,将测斜仪所测水平横向位移视为桩身的弯曲变形参数,并用MATLAB拟合工具箱对桩身弯曲变形离散数据进行曲线拟合,计算抗滑桩的剪力、弯矩和抗滑力。最后,将该方法应用于鹤大高速公路桓仁新开岭至丹东古城子段YK24+785～YK24+930段路基右侧滑坡的抗滑桩变形受力监测,并与设计文件中抗滑桩内力进行比较,可知抗滑桩的抗滑效果,并为抗滑桩的设计提供依据。
The horizontal lateral displacement of anti-slide piles was monitored by lashing PVC inclinometer pipe in large section reinforced concrete anti-slide piles. For reinforced concrete anti-slide pile, it is considered as elastic foundation beam buried in soil. According to the Wenker’s assumption, the differential equation of elastic curve is obtained, then the pile angle, bending moment, shear force, For the reinforced concrete anti-slide piles, the horizontal lateral displacement measured by the inclinometer is regarded as the bending deformation parameter of the pile, and the curve fitting of the discrete data of the pile bending deformation is performed by using the MATLAB fitting toolbox to calculate the shear resistance of the anti-slide pile Force, bending moment and slip resistance. Finally, this method is applied to the deformation resistance monitoring of anti-slide piles on the right landslide of YK24 + 785 ~ YK24 + 930 subgrade in Huanren from Huanren to Hedan Expressway in Dandong, Internal forces are compared, we can see the anti-skid pile anti-slide effect, and provides the basis for anti-slide pile design.