Taking Jinchuan Hydropower Station as an example,Midas GTX NX finite element calculation software is used to calculate and analyze the influence of the height of the wall-attached concrete on the axial force of the rock anchor beam,the stress and strain of the rock anchor beam and the internal force of the wall-attached concrete.The results show that increasing the height of the concrete slab leads to:(1)the tensile stress of the tensile anchor and the compressive anchor of the rock anchor beam decreases,and the tensile stress of the tensile anchor near the rock table increases;(2)The compressive stress of rock anchor beam decreases,the first principal tensile stress and longitudinal tensile stress decrease,the second principal tensile stress and the third principal tensile stress increase.(3)The vertical upward uplift deformation and the horizontal upstream deformation decrease,and the increase of the height of the concrete slab makes the deformation of the rock anchor beam more uniform.The maximum principal tensile stress and longitudinal tensile stress are greater than the standard value of concrete tensile strength,and the tensile stress can be borne by configuring steel bars.
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