PHC与CFG桩复合地基在高速铁路基底中处理效果试验对比

doi:10.13722/j.cnki.jrme.2014.s2.097

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摘要以京津城际铁路2种不同桩筏复合地基处理形式为工程实例，对比分析PHC桩和CFG桩的单桩承载力、荷载桩–土分担、以及不同位置的荷载和沉降与时间的变化特征。结果表明，PHC桩的单桩承载力明显大于CFG桩，约为其1.33倍；PHC复合地基段路基的中心沉降量小于CFG桩复合地基段；PHC桩断面的桩–土应力比为17～47，荷载分担比为0.56～0.78，而 CFG桩断面桩–土应力比为12～25，荷载分担比为0.42～0.59，说明PHC桩复合地基能尽量减小桩间土的荷载。认为在松软地基上采用PHC管桩不仅能保证复合地基中的成桩效果，也能减小桩间土的荷载承担，从而减小复合地基的总沉降量。

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	沈宇鹏1
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	毛远凤1
	荆鹏1
	程万慧1
	田亚护1
	2

关键词 ：复合地基；高速铁路；沉降；桩&ndash, 土应力比；单桩承载力

Abstract：Through analyzing the differences of bearing capacities of a single pile，pile-soil load distribution and variation characteristics of the load and settlement in the different times，PHC and CFG piles raft composite foundations are compared when applied to treat the foundations of Beijing-Tianjin intercity railway. The results show that PHCs bearing capacity of single pile is obvious higher than the CFGs，about 1.33 times，and the settlement in PHCs section is smaller than CFGs. The results appear that the pile-soil stress ratio is about 17–47，and load ratio is 0.56–0.78 in PHCs section. The pile-soil stress ratio is 12–25，and load ratio is 0.42–0.59 in CFGs section. It is said that the PHC piles can bear more load than the CFG，the soils in PHCs section will bear less load than CFGs. In summary，PHC piles are used to as a ground treatment not only to ensure pile-forming effect，but to reduce the load on soil between two piles in soft foundations，and to decrease the total settlement of composite.

Key words： composite foundation high speed railway settlement pile-soil stress ratio bearing capacity of single pile

引用本文:

沈宇鹏1，2，毛远凤1，荆鹏1，程万慧1，田亚护1，2. PHC与CFG桩复合地基在高速铁路基底中处理效果试验对比[J]. 岩石力学与工程学报, 2014, 33(S2): 4174-4180.
SHEN Yupeng1，2，MAO Yuanfeng1，JING Peng1，CHENG Wanhui1，TIAN Yahu1，2 . EXPERIMENTAL EFFECT CONTRAST BETWEEN PHC AND CFG PILE-RAFT COMPOSITE FOUNDATION IN HIGH SPEED RAILWAY BASE TREATMENT. , 2014, 33(S2): 4174-4180.

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https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2014.s2.097 或 https://rockmech.whrsm.ac.cn/CN/Y2014/V33/IS2/4174

[1]	OHKUBO T，ASADA S，KARUBE D. A study on the reinforcing effects of geogrids over laid on pile group for the embankment foundations[C]//Earth Reinforcement. Rotterdam：Balkema，1996：641-646.
[2]	ZIMMELS Y，BOAS A. Construction of a pile-based offshore airport[J]. Ocean Engineering，2003，30(1)：127-150.
[3]	CARD G B，CARTER G R. Case history of a piled embankment in London¢s Docklands[J]. Geological Society，London，Engineering Geology Special Publications，1995，10(1)：79-84.
[4]	HAN J，AKINS K. Use of geogrid-reinforced and pile-supported earth structures[C]// Proceedings of Deep Foundation：an International Perspective on Theory，Design，Construction and Performance. Reston，Va.，USA：ASCE，2002：668-679.
[5]	TAZOH T，GAZETAS G. Pile foundations subjected to large ground deformations：lessons from kobe and research needs[C]//Proceedingsof 11th World Conference on Earthquake Engineering. [S.l.]：[s. n.]，1996：2 081-2 088.
[6]	OGURA S，KISHIDA Y. Application of the pile toe test to cast-in- place and precast piles[J]. Foundation Drilling，1996，35(1)：23-29.
[7]	OSTERBERG J O. The Osterberg load test method for bored and driven piles：the first ten years[C]//Proceedings of the 7th InternationalConferenceand Exhibition on Piling and Deep Foundations. Vienna，Austria：Deep Foundations Institute，1998：1-28.
[8]	王晓伟. PHC 桩单桩竖向承载力可靠度研究[硕士学位论文][D]. 南京：南京航空航天大学，2007.(WANG Xiaowei. Reliability research of PHC bearing capacity of single pile[M. S. Thesis][D]. Nanjing：Nanjing University of Aeronautics and Astronautics，2007.(in Chinese))
[9]	宗钟凌.海淤地质条件下PHC管桩荷载传递机理研究[J].建筑科学，2011，27(7)：23-24.(ZONG Zhongling. Study on load transfer mechanism of PHC piles under the sliting geological condition[J].Building Science，2011，27(7)：23-24.(in Chinese))
[10]	刘江.PHC桩复合地基工作性状及优化设计[硕士学位论文][D].东营：中国石油大学，2010.(LIU Jiang. Behavior of PHC pile composite foundation and optimization method research[M. S. Thesis][D].Dongying：China University of Petroleum，2010.(in Chinese))
[11]	程岩.PHC桩桩网结构处理深层软土地基的设计参数及施工工艺研究[硕士学位论文][D].上海：同济大学，2007.(CHENG Yan. Design parameters and construction technology research of PHC pile network structure to deal with deep soft ground[M. S. Thesis][D]. Shanghai：Tongji University，2007.(in Chinese))
[12]	张震，雷瑜.高速铁路路基施工中PHC桩沉桩挤土效应[C]//中国交通建设集团有限公司第一届科技大会论文集. 北京：[s. n.]，2009：567-573.(ZHANG Zhen，LEI Yu. Research on soil squeezing effect of pile sinking of PHC pile for subgrade of high-speed railway[C]// Proceedings of the first Conference of Science and Technology of China Communications Construction Group Co.，Ltd. Beijing：[s. n.]，2009：567-573.(in Chinese))
[13]	中华人民共和国行业标准编写组.JGJ 106—2003建筑基桩检测技术规范[S].北京：中国建筑工业出版社，2003.(The Professional Standards Compilation Groupof the People′s Republicof China . JGJ 106—2003 Technical code for testing of building foundation piles[S]. Beijing：China Buiding Industry Press，2003.(in Chinese))