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承台是桩基础的重要组成部分。为了把柱子传来的荷载安全可靠地传给每一根桩,承台必须有足够的强度和刚度。钢筋混凝土柱下的独立桩基承台,通常应进行以下几项强度计算:柱对承台的冲切;角桩对承台的冲切;承台斜截面抗剪,承台抗弯。一、钢筋混凝土柱对承台的冲切受装配式钢筋混凝土柱或现浇柱中心荷载作用的承台,应按下式进行冲切计算: P≤[α_1(b_k+C_2)+α_2(d_k+C_1)]h_1 R_p (1)式中 P——计算冲切力,其值等于冲切锥体底面周界范围外所有桩的净反力之和; b_k、d_k——柱子柱脚处的截面边长;
Pile caps are an important part of the pile foundation. In order to safely transmit the load from the column to each pile, the platform must have sufficient strength and rigidity. For individual pile foundation caps under reinforced concrete columns, the following strength calculations should normally be carried out: the punching of columns to caps; the punching of corner piles to caps; the shearing of cap shears, and the bending of caps. 1. Capping of reinforced concrete columns to caps The cap of the center load of prefabricated reinforced concrete columns or cast-in-place columns shall be stamped and calculated as follows: P≤[α_1(b_k+C_2)+α_2(d_k +C_1)]h_1 R_p (1) where P - calculates the punching force, which is equal to the sum of the net reaction forces of all the piles outside the circumference of the punching cone; b_k, d_k - at the posts Section length;