研究结果表明：溶洞顶板厚度在一定范围内，当顶板跨度从B增加到4B时，地基极限承载力降低1/3；
The results show that the ultimate bearing capacity of foundation drops 1/3 when the width of rock plate upper cave increases from B to 4B within the limits of depth.
研究结果表明：溶洞顶板厚度在一定范围内，当顶板跨度从B增加到4B时，地基极限承载力降低1/3；
The results show that the ultimate bearing capacity of foundation drops 1/3 when the width of rock plate upper cave increases from B to 4B within the limits of depth.
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