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 drill rooted nodular pile is a new type of composite pile foundation which consists of precast nodular pile and the cemented soil along the pile shaft. The bearing capacity of this composite pile is promoted via the cemented soil around the pile shaft which improves the skin friction and the enlarged cemented soil base which promotes the tip bearing capacity. A field test by self-balanced method is conducted to investigate the tip bearing capacity of this new type of pile; the theoretical tip displacement formula is also adopted to calculate the tip displacement of the composite pile. In addition, a model test is conducted to study the tip bearing capacity of the new type pile with different relative positions of the precast nodular pile base and enlarged cemented soil base. The results of the field test and model test show that: the enlarged cemented soil base can truly promote the tip bearing capacity of the new type pile; the tip bearing capacity of this new type of pile seems to be fully mobilized when the nodular pile tip is at the middle of the enlarged cemented soil base; the theoretical tip displacement formula can be applied to this new composite pile foundation; and the theoretical tip displacement-tip load curve fits well with the measured curve when the nodular pile tip is at the middle of the enlarged cemented soil base.