Method for calculating bearing capacity of post-cast strip PVC pipe constraint plain concrete temporary support

The invention discloses a method for calculating the bearing capacity of a post-cast strip PVC pipe constraint plain concrete temporary support. The method comprises the following steps that the calculation length 10 of the concrete temporary support is calculated; calculating the slenderness ratio of the concrete temporary support: 10/dcor, 10/b, 10/i; if 10/dcorr is smaller than or equal to 12, 10/b is smaller than or equal to 14, or 10/i is smaller than or equal to 48, considering the circumferential confining effect of the PVC pipe and the radial restraining effect of the circumferential ribs, and determining the axial pressure bearing capacity Nu1 and Nu2 of the PVC pipe restrained plain concrete temporary support; determining the axial pressure bearing capacity Nu of the PVC pipe restrained plain concrete temporary support; if 10/dcors is larger than 12 or 10/b is larger than 14 or 10/i is larger than 48, the axial pressure bearing capacity Nu0 of the PVC pipe restrained plain concrete temporary support