... 雨季施工 RAINING SEASON CONSTRUCTION ; rainy season construction 雨季草原 karroo ; karoo 玉米雨季 maizerains ...
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The tunnel site is located in Karstic area with limestones gravels, where is easy to cave in when construction in raining season.
隧道位于岩溶地区,岩溶角砾岩、白云质灰岩在雨季施工时易产生坍塌、突水和突泥现象。
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