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静钻根植竹节桩是由预制竹节桩和桩周水泥土所构成的一种新型组合桩基,它主要通过桩周水泥土改善桩-土接触面摩擦性质以及桩端水泥土扩大头改善桩端承载性能。通过现场静载试验对静钻根植竹节桩桩端承载性能进行研究,并采用传统桩端沉降计算公式对其桩端沉降进行计算;通过模型试验对竹节桩桩端与水泥土扩大头相对位置不同的试桩桩端承载性能进行研究。结合现场和模型试验可以得到:桩端水泥土扩大头可以改善静钻根植竹节桩桩端承载性能;当竹节桩桩端位于水泥土扩大头中间位置时,静钻根植竹节桩桩端承载性能最好;可以用传统桩端沉降计算公式对静钻根植竹节桩桩端沉降进行计算,且当竹节桩桩端位于水泥土扩大头中间位置时,理论计算与实测曲线几乎完全吻合。
The static drilling rooted bamboo piles are a kind of new combined pile foundation consisting of prefabricated bamboo piles and cementitious soil around the piles. It improves the friction properties of the pile-soil interface and the improvement of the piles Pile end carrying capacity. Through the on-the-spot static load test, the bearing capacity of the root end of static bamboo rooted bamboo section pile is studied, and the settlement of pile tip is calculated by the traditional pile end settlement formula. By the model test, The test results of different load-bearing capacity of pile tip were studied. According to the site and model tests, it can be obtained that: the cement-soil enlarged head of the pile end can improve the bearing capacity of the root end of the static drilling bamboo root section; when the bamboo pile end is located in the middle position of the cement soil expansion head, The best settlement of settlement can be calculated by traditional settlement formula of pile tip settlement, and the theoretical calculation and measured curve almost coincide when the pile end of bamboo piles is located in the middle of cement soil enlargement head .