市政管网设计规范（Code for design of municipal pipe network）.doc

市政管网设计规范（Code for design of municipal pipe network） 1. water supply pipe with HDPE pipe. 2. to the sluice valve installation see standard atlas of Su S01-2004-14. Water meter installation see standard atlas of Su S01-2004-31. 3. outdoor fire hydrant installation see GB Atlas 01S201. 4.: water supply pipe pressure test after installation, should be in accordance with the requirements of acceptance specification of 1.4MPa hydrostatic testing. 5. water supply pipes and drainage pipeline if self cross collision or other large diameter, bent by colliding with a water supply pipeline; if the cross wire pipe, bend through. 6. water supply pipeline by excavation of buried pipe foundation encountered in soft soil foundation treatment need to do another, generally located in the 20cm sand or stone dust leveling layer at the end of the pipe. The pipeline is installed in the hard ground water tube on both sides in the pit backfill sand or stone dust, water and solid. On both sides of the green pit underground water pipe pipe and pipe surface backfill should be stratified compaction, compaction shall be not less than 93%. Implementation of code of acceptance of construction quality of water supply drainage and heating engineering GB50242-2002. 7.: rain, sewage drainage pipe pipe HDPE pipe. 8. rain, sewage pipeline backfill foundation and see Su S01-2004-77. 9. rain and sewage pipe should be used to flush the top tube method in the manhole. 10. in the pipeline under roadway, pipe roof covering thickness not less than 0.8M, otherwise should be taken to prevent breakage of the pipeline compression technology. 11. see Su S01-2004-140 practices in manholes. 12. sewage inspection wells see Su S01-2004-91 practices. 13. after the completion of construction should be according to the specifications for closed water test. According to the provisions of the 14. water supply and drainage pipeline engineering construction and acceptance of the implementation of standards. The 15. principle