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5.5 桩基础单桩的承载量O可用土工静力计算,打试桩或用荷载试验求得。有时将这几种方法组合采用。桩的计算承载量不得大于相应于桩身材料本身计算强度的承载量。在此种分析中桩身横向未受土支承部分可能失稳的影响应予考虑。对受拉的混凝土桩而言,必须使单是钢筋就足以支承计算拉力土工静力计算中假定单桩承载量是由桩尖阻力及不同土层中的桩周阻力所组成:
5.5 The bearing capacity O of a single pile of pile foundation can be calculated by using the geostatic force, and the test pile can be obtained by the load test. Sometimes these methods are used in combination. The calculated bearing capacity of the pile shall not be greater than the bearing capacity corresponding to the calculated strength of the pile material itself. In this type of analysis, the influence of the possible lateral instability of the pile body in the lateral direction of the pile should be taken into account. For tensioned concrete piles, it is necessary to make the single reinforcement sufficient to support the calculation of the pulling force. In the calculation of the static force, the bearing capacity of a single pile is composed of the resistance of the pile tip and the resistance of the pile in different soil layers: