The soft foundation has the characteristic of" three low and three high", namely high moisture content, high porosity ratio, high compressibility, low intensity strength, low permeability, low coefficient of consolidation.
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The concrete construction reach a certain time, low intensity, and show slurry rough, loose, condensation bad or insufficient strength. Main reasons are.
混凝土施工到达一定时间后，强度低，表现出浆体粗糙、松散、凝结不好或强度不够。主要原因有。
It has high mechanical strength, toughness, good heat resistance and high thermal intensity, low shrinkage, good curing characteristics.
它具有机械强度高、韧性好、耐热性好及高的热强度、低收缩性、固化性好等特点。
From rock strength, the main seam roof is divided into extra-high intensity, high intensity, middle intensity, and low intensity.
从岩石强度方面把煤层顶板分成强度特高型、强度高型、强度中等和强度低型。
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