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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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[2] 汪耀武,刘晓敏,张扬.饱和土中静压预应力管桩挤土效应的监测[J].工业建筑,2011,41(3):99-102. Shen S,Zhu H,Han J,et al.Evaluation of a Dike Damaged byPile Driving in Soft Clay [J].Journal of Performance andConstructed Facilities,2005,19(4): 300-307. [3] 雷华阳,李肖,陆培毅,等.管桩挤土效应的现场试验和数值模拟[J].岩土力学,2012,33(4):1006-1012. [4] 李富荣,张艳梅,王照宇.软土中静压桩挤土效应的模型试验研究[J].建筑科学,2013,29(1):52-54. [5] 卞立民,徐海波,徐建平.沉桩挤土效应研究综述[J].华中科技大学学报:城市科学版,2002,19(3):68-72. [6] 黄东胜,李湖胜,王朝胜.挤土效应机理及其防护措施研究[J].四川建筑科学研究,2009,35(5):90-92. [7] 鲁绪文,何宁,关秉洪,等.混凝土芯砂石桩的沉桩挤土效应及超孔隙水压力变化[J].水利水运工程学报,2006,12 (4 ):41-45. [1] 吴文,徐松林,周劲松,等.深基坑桩锚支护结构受力和变形特性研究[J].岩石力学与工程学报,2001,20(3):399-402. [2] 姜晨光,林新贤,黄家兴.深基坑桩锚支护结构变形监测与初步分析[J].岩土工程界,2002,5(8):55-56. [3] 时伟,刘继明,章伟.深基坑桩锚支护体系水平位移试验研究[J].岩石力学与工程学报,2003,22(S1):2355-2358. [4] 邓修甫,白云峰.桩锚支护体系的受力和变形研究[J].焦作工学院学报:自然科学版,2003,22(3):191-193. [5] 李宝平,张玉,李军.桩锚式支护结构的变形特性研究[J].地下空间与工程学报,2007,3(7):1291-1294. [6] 胡贺松.深基坑桩锚支护结构稳定性及受力变形特性研究[D].长沙:中南大学,2009. [7] 李波.桩锚支护体系在北京地铁车站深基坑中的应用[J].市政技术,2008,26(4):348-350. -
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