Method for determining thickness of shield underground butt joint section reinforced concrete lining

The invention provides a method for determining the thickness of reinforced concrete poured in a shield underground butt joint section. The method comprises the following steps that (1) the diameter d1 of a shield tunneling machine is determined; (2) the shield shell thickness delta 1 is determined; 3) determining the burial depth h1 of the tunnel; 4) determining the natural weight gamma of the soil body above the underground water level and the depth h2 from the underground water level to the ground; 5) determining the saturation weight gamma sat and the effective weight gamma'of the soil body below the underground water level; 6) determining an overlying load P0 of the tunnel; (7) determining the vertical soil pressure P at the arch crown of the shield according to P = P0 + sigma gamma ihi + sigma gamma'jhj, (8) determining the pressure resistance allowable stress sigma1 of a shield shell material, (9) determining the pressure P1 capable of being borne by a shield shell, (10) determining the pressure P2 nee