说明：

1、 柔性填料材料：沥青麻丝、聚苯乙烯板、聚氯乙烯泡沫塑料板。

2、 密封膏? 聚硫密封膏、聚氣脂密封膏可

3：穿管处混擬土墙厚不畐小于300,否则应使堵壁一边加厚或两边加厚，加厚部分的直径至少为D5±200_o

4、 钢管和挡板焊接后经镀锌处理，再试行与套管安装。

5、 焊接采用手工电瓠焊，焊条型号E4303_o

Explain：

1. Flexible filler materials： asphalt bast fiber, polystyrene board, polyvinyl chloride foam board.

2. Sealing paste: polysulfide sealant and polychloride grease sealant.

3. The thickness ol eoftcrete wall should not be le&s than 300. Otherwise, one side ol the wall should be thickened or both should be thickert&d. The diameter of the thickened part should be al least D5-*-200.

4. The steel pipe and balfle are walded and galvanized, and then the casing is installed on trial.

5. Manual arc welding is used for welding. Electrode type E4303.