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EXPERIMENTAL STUDY ON PRECAST SELF-DRAINING PILE
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摘要: 提出一种具有自排水概念的预制桩，通过室内和现场测试，对该种预制自排水桩的沉桩排水效果进行检验，并与普通预制桩进行桩身承载力和单桩竖向承载力的现场对比。结果表明：相比普通方桩，预制自排水桩具有良好的排水性能，桩侧砂槽尤其是；形侧槽可以起到竖向排水井的作用；同时，从桩身承载力及吊装安全性角度看，采用以侧槽和角点控制保护层的预制自排水桩可以较好满足使用要求，且作为摩擦型桩，预制自排水桩桩侧阻力有所增加，桩周土体固结速度又较快，使得预制自排水桩单桩竖向承载力稍高于普通方桩。Abstract: The design guiding ideology of precast self-draining pile was proposed，and the pile-sinking drainage effectof precast self-draining pile was examined through the indoor test and field test，and then the pile body bearingcapacity and vertical bearing capacity of a single pile of precast self-draining pile were experimentally studied． Theresults showed that as compared with an ordinary square pile，precast self-draining pile had good drainage properties，and its pile-side sand channel could play the role in vertical offset well，especially the precast self-draining pile withthe ＜ -shaped side channel． At the same time，from the perspective of pile body bearing capacity and its liftingsecurity，precast self-draining pile could meet the operating requirements better using side channel and angular pointto control protective layer． The vertical bearing capacity of a single pile of precast self-draining pile was slightlyhigher than that of the ordinary square pile，due to the faster consolidation speed of the soil around the pile．
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Key words:
- precast self-draining pile /
- pile-sinking drainage /
- bearing capacity /
- experiment
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