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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。

    youdao

  • 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。

    youdao

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