Research Article
Investigation and Analysis on Crystallization of Tunnel Drainage Pipes in Chongqing
Table 2
Investigation locations and samples.
| | Investigation locations | Number | Lithology | | Locations | Water samples | Crystal samples |
| | Tunnel between Chongqing North Railway Station and Yulu Station K21+772 | Site 1 | Water 1 | Sample 1 | Sand mudstone and sandstone | | Tunnel between Chongqing North Railway Station and Yulu Station K21+610 | Site 2 | Water 2 | Sample 2 | Sand mudstone and sandstone | | Tunnel between Danzishi Station and Tushan Station YDK28+285 | Site 3 | Water 3 | Sample 3 | Sand mudstone | | Tunnel between Danzishi Station and Tushan Station YDK28+180 | Site 4 | Water 4 | Sample 4 | Sand mudstone | | Tunnel between Wutong Road Station and Wulidian Station YDK23+920 | Site 5 | Water 5 | Sample 5 | Sand mudstone | | Tunnel between Min’an Avenue Station and Chongqing North Railway Station K20+200 | Site 6 | Water 6 | Sample 6 | Sand mudstone and sandstone | | Right tunnel of New Zhongliang Moutain YK3+144 | Site 7 | Water 7 | Sample 7 | Limestone and dolomitic limestone | | Left tunnel of New Zhongliang Moutain ZK4+120 | Site 8 | Water 8 | Sample 8 | Flint limestone |
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