【多选题】【消耗次数：1】
表征土基强度与刚度指标有()。
①
回弹模量
②
孔隙比
③
压缩系数
④
加州承载比
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相关题目
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下列关于承载板法测定土基回弹模量的说法中，正确的是______。
①
以半无限大线弹性体理论为依据
②
测试时，采用逐级加载、卸载的方式
③
每级荷载作用下稳定3min后读数
④
刚性承载板厚度20mm，直径30cm
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关于土的压缩系数的说法正确的是（ ）。
①
土的压缩曲线越平缓土的压缩性越低
②
土的压缩系数是无量纲的
③
土的压缩系数不是常数
④
工程上常采用压缩系数a1-2来判别土的压缩性
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