公式较真实地反映了大体积混凝土的强度特性，直观地表明了在某运行状态下混凝土可容许承受的应力。
These formulas more actually reflect the strength characteristics of massive concrete and visually show allowable design stress of concrete under certain operation state.
采取措施保证桩顶(尤其是桩头部分)混凝土强度，提高单桩容许承载力。
The strength of top pile concrete, especially head part, ensured by taking measurement, Single allowable bearing capacity of this pile is enhanced.
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