In order to ensure safety use of plastic underground drainpipe under extra-pressure, the choice of ring stiffness is one of the keys in planning.

• 论文还特别提出环刚度是塑料埋地排水管抗外压负载能力的综合参数,为了保证塑料埋地排水管在外压负载下安全工作,环刚度的选择是设计中的关键之一。