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从地下交通设施研究协会(STUVA)最新年度报告得知:至1985年底,约有231km的隧道段在施工,其中185km为交通运输隧道,也有少量的污水排放隧道——修建庞大的蓄水池也是这样——其中大部分(近35km的隧道)都采用了现行新的施工方法。这些隧道段是指仍在施工中的隧道。由此可以了解,仅在近十年内,就建造了上千km长的隧道。按经验,在沥青或塑料基层上进行密实处理很难做到绝对不渗水,而且即使在应有的密
According to the latest annual report of the STUVA: By the end of 1985, about 231km of tunnel sections were under construction, 185km of which were transport tunnels and a few of them were sewage tunnels. The construction of huge reservoirs was also In this way - most of them (nearly 35km of tunnels) use the current new construction method. These tunnel sections refer to the tunnels still under construction. From this we can see that in just ten years, we have built thousands of kilometers of tunnels. As a rule of thumb, it is very hard to be absolutely impermeable to a solid treatment on asphalt or plastic substrates,