逆向受腐蚀和损耗冲击的情况常见。Paving the invert with concrete can be an inexpensive way to extend the service life of the structure if done right and at the right time.  A non-reinforced paved invert with no mechanical attachments could provide 15 - 25 or more years of additional service in non-freeze thaw zones and in existing pipes that are at a abrasion level 1 (as defined by FHWA).  Be careful though, in freeze thaw zones or with those pipe structures that would be considered a level 2, 3 or 4 for abrasion, a non-reinforced and unattached paved invert could provide very little additional service life.

3事物考虑

1. 可使用简洁混凝土路面?通常经验显示 墙段损耗不应大于四分之一That means roughly 3/4 of the original wall thickness should still be present in order for a plain, non-reinforced and non-anchored concrete pavement to work.  The original structural design can provide the baseline factors of safety to help with this analysis and each particular structure location can be evaluated using current industry methods to get precise results, but you'll need a representative number of core samples from the invert of the host pipe in order to truly know the average amount of metal loss in the invert.  Mechanical attachments may not be necessary if the host pipe is still operating within its original design safety factors.
2. 万一管道已经穿孔或严重腐烂?管道已经统一穿透,人行道必须使用加固和推移机制原管道墙实际负载或推力转移很重要,这样管道才能继续正常运行。软性CMP结构依赖被称为“土壤结构交互作用”的现象。如果发生了重大的金属损耗或回填材料迁移发生,或管道开始移动,则全推移至关重要,因为土壤结构交互作用不再假设存在
3. 如何设计结构反转Caltrans开通直通有效的推文传输方式,DIB83详解,这是一个设计信息公告。它是一个可靠技术资源,来自极有声望DOT

铺面倒转(非结构化和结构化)可以是一种成本效益高的方法来扩展CMPculvert或暴雨下水道的使用寿命。