地下洞蚀
Underground cavitation
以上为机器翻译结果，长、整句建议使用 人工翻译 。
由于地下水潜蚀、化学溶蚀等作用，灰岩地区溶洞、土洞较为发育，给桩基施工带来较大困难。
By the action of groundwater erosion and chemolysis, cavities are well developed in limestone area, which causes many problems for pile foundation construction.
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