These formulas more actually reflect the strength characteristics of massive concrete and visually show allowable design stress of concrete under certain operation state.
2
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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