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| APPLICATION OF THE TRIPLE-BRIDGE CONE PENETRATION TEST IN PILE FOUNDATION |
| LI Zhizhong，LI Zhaoyuan，YANG Ran |
| (Guangdong Yongji Construction Foundation Co .，Ltd，Foshan 528300，China) |
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Abstract A new walking type static cone penetration which has strong penetration ability was invented. It can penetrate into the hard rock and soil layers such as strong weathered rock and reach the required exploration depth of end bearing pile and was called triple-bridge cone penetration which the total penetration force test was added on the basis of the double- bridge cone penetration test. A new accurate estimation method of piling pressure at the specified pile diameter and depth or embedded depth of pile at the specified piling pressure and pile diameter has been proposed after the comparative study between triple-bridge cone penetration test and pressure test of model pile，and The whole rock and soil are considered as a system. A new estimation method of ultimate bearing capacity of the end bearing pile in the pearl river delta region was summarized after the comparative study between triple-bridge cone penetration test and static loading test，and these methods fill the gaps in current code. The findings show that the triple-bridge cone penetration test which has strong penetration ability will provide very useful guidance to the design，construction and inspection of pile foundation.
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| [1] MAYERHOF G G. The Ultimate Bearing Capacity of Wedge-shaper Foundations. In：Caquo A ed. proc 5th ICSMFE. Paris：Dunod press，1961，105–109.
[2] VESIC A S. Expansion of Cavity in an Infinite Soil Mass，J. S. M. EE. ASCE，1972，98(3)：265–289.
[3] BUTTERFIELD R，BANERJEE P K. The Effects of PoreWater Pressures on the Ultimate Bearing Capacity of Driven Piles. In：Proc 2nd south East Asian regional Soil Mech Found Engrg. Tykyo.，1970，385–394.
[4] WALKER J，YU H S. Adaptive finite element analysis of cone penetration in clay. Acta Geotechnica，2006，1：43–57.
[5] Jiang M J，Zhu H H，Harris D. Classical and non-classical kinematic fields of two-dimensional penetration tests on granular ground by discrete element method analyses. Granular Matter，2008，10：439–455.
[6] 储王应，王能民. 静力压桩沉桩阻力分析与估算[J]. 岩土工程技术，2000，1：25–28.(CHU Wangyin，WANG Yinming. Analysis and estimation of sinking pile resistance of static press pile[J]. Geotechnical Engineering Technique. 2000，1：25–28.(in Chinese))
[7] 韩选江. 静压桩的压桩力和承载力的试验研究[J]. 建筑结构学报，1996，17(6)：71–77.(HAN Xuanjiang. Experimental research on static pressure and bearing capacity of statically pressed piles[J]. Journal of Building Structures，1996，17(6)：71–77.(in Chinese))
[8] 朱小林. 预估桩的沉桩阻力和沉桩可能性[C]// 软土地基理论与实践. 北京：中国建筑工业出版社，1992：125–128.(ZHU Xiaolin. Prediction of penetrating resistance and the possibility of pile driving. theory and practice on soft soil foundations[C]// Beijing：China Building Industry Press，1992：125–128.(in Chinese))
[9] 郑 刚，顾晓鲁. 软土地基上静力压桩若干问题的分析[J]. 建筑结构学报，1998，19(4)：54–60.(ZHEN Gang，GU Xiaolu. Analysis of some problems of statically pressed piles in soft soils[J]. Journal of Building Structures，1998，19(4)：54–60.(in Chinese))
[10] 樊向阳. 静压桩施工沉桩阻力及沉桩挤土效应研究[博士学位论文][D]. 同济大学博士论文，2007.(FAN Xiangyang. Study of sinking-resistance and compaction effect of static-press pile[Ph. D. Thesis][D]. Shanghai：Tongji University，2007.(in Chinese))
[11] 王钟琦. 我国的静力触探及动静触探的发展前景[J]. 岩土工程学报，2000，22(5)：517–522.(WANG Zhongqi. The Chinese CPT and the pro spect of penetration tests[J]. Chinese Jounal of Geotechnical Engineering，2000，22(5)：517–522.(in Chinese))
[12] 董晓马，杨广军. 静力触探技术发展及研究动向[J]. 西部探矿工程，2008，(9)：12–14.(DONG Xiaoma，YANG guanjun. development and research trends of the technique of CPT[J]. West-China Exploration Engineering，2008，(9)：12–14.(in Chinese))
[13] 焦德智，周 涛，洪 岳. 静力触探在密实厚砾砂层中的应用[J]. 中国新技术新产品，2009，(9)：155.(JIAO Dezhi，ZHOU Tao，HONG Yue. Application of CPT in close-grained thick gravel layer[J]. China New Technologies and Products，2009，(9)：155.(in Chinese))
[14] JGJ 94——2008. 建筑桩基技术规范[S]. 北京：中国建筑工业出版社，2008. |
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2015, Vol. 34 
