1) cave level
洞层
2) single cavern and double-layer
单洞双层
1.
In order to avoid the dense pile foundations of line-plot tall buildings,parts of metro tunnel need to be constructed by single cavern and double-layer.
地铁隧道为避开沿线高大建筑物密布的桩基,部分段落需要采用暗挖法施工的单洞双层隧道通过,而此时地铁隧道穿越的地层条件复杂,围岩极其软弱,地下水位高,且隧道埋深较浅,其力学行为将和单个隧道大不相同。
3) cave horizon
洞穴层
1.
Based on the principle that caves develop along the water table in a condensed carbonate land, cave horizons are correlated and caves identified from wells are reconstructed in paleogeomorphic sections.
洞穴层是识别多期次岩溶旋回的标志,是岩溶旋回连接沉积旋回及周期性海平面变化的纽带。
4) multilayer cave
多层溶洞
5) void layer
空洞层
6) Cave layer
洞穴地层
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