The foundation with different length-width ratio had different depth of compressed layer.

基础长宽比不同，压缩层计算深度不同。

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There are mainly two methods to determine compressed layer thickness in calculating foundation settlements, control strain method and control stress method.

地基沉降计算中压缩层厚度确定方法主要有应变控制法和应力控制法两种。

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Based on the connecting strength of soil, the effects of foundation length-width ratio on base additional stress and depth of compressed layer were discussed.

基于土的连结强度，研究基础长宽比对基底附加应力和压缩层深度的影响。

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It is, however, important for the helmet to fit well so that it stays in place during a fall, and the polystyrene layer can only be compressed once so helmets should be replaced after an accident.

BBC: Cyclist