第四章结构设计第4-1条焊缝结构硬聚氯乙烯塑料焊缝结构按表4-1。第4-2条圆筒1、筒节长度筒节长度以硬聚氯乙烯塑料板材宽度为宜,筒节最小长度为200毫米。2、圆筒加强结构圆筒内部环筋板加强(图4-1,图4-2)圆筒内部环筋板与立筋板同时加强(图4-3) Chapter 4 Structural Design Article 4-1 Weld Structure The structure of PVC flexible weld is shown in Table 4-1. Article 4-2 Cylinder 1, the length of the cylinder The length of the cylinder section is appropriate for the width of the rigid polyvinyl chloride plastic sheet, the minimum length of the cylinder section is 200 mm. 2, the cylinder structure to strengthen the inner wall of the cylinder ring reinforcement (Figure 4-1, Figure 4-2) cylinder internal ribs and ribs at the same time strengthening (Figure 4-3)