沉渣预压处理的群桩模型试验研究

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Abstract For reducing the influence of bottom sediment on bearing capacity of bored piles，a method of preloading sediment is proposed based on the principle of pile-soil interaction and the allowable displacement amount for frictional resistance. And the model tests are designed，which studied the bearing behavior of pile group with sediment and without sediment. The model experiment include two-pile foundation，three-pile foundation and four-pile foundation. For pile group without the sediment，the P-s curve of pile group represents step shape between pre-and post compacting the bottom sediment. The settlement of pile is greater after compacting the sediment. And the frictional resistance is greater than the general pile. Meanwhile，with the increase of load，the tip resistance experiences a process of small to great，and finally reaches the normal level. Through transferring the P-s curve of pile with sediment，the pile bearing capacity return to normal after the expense of certain settlement，and close contact between the pile cap and soil due to settlement，making the pile and soil common loading，which finally makes the pile has a higher vertical bearing capacity and a better horizontal bearing performance. The research results can provide a reference for similar projects.

Key words： pile foundations preloading sediment bearing capacity model experiment

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	Articles by authors
	SONG Linhui1
	CHEN Jian2
	MEI Guoxiong2

Cite this article:

SONG Linhui1,CHEN Jian2,MEI Guoxiong2. STUDY OF PILE GROUP MODEL TEST WITH PRELOADING BOTTOM SEDIMENT[J]. , 2012, 31(S1): 3224-3230.

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https://rockmech.whrsm.ac.cn/EN/Y2012/V31/IS1/3224

[1] 蒋建平，汪明武，高广运. 桩端岩土差异对超长桩影响的对比研究[J]. 岩石力学与工程学报，2004，23(18)：3 190–3 195.(JIANG Jianping， WANG Mingwu， GAO Guangyun. Contrastive study on influence of difference of pile end rock-soil layer on super-long pile[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(18)：3 190–3 195.(in Chinese))

[2] BROWN D. Effect of construction on axial capacity of drilled foundations in piedmont soils[J]. Journal of Geotechnical and Geoenvironment Engineering，2002，128(12)：967–973.

[3] 席宁中. 试论桩端土强度对桩侧阻力的影响[J]. 建筑科学，2000，16(6)：51–54.(XI Ningzhong. A discussion on influence of soil strength underneath a pile on the pile shaft resistance[J]. Building Science，2000，16(6)：51–54.(in Chinese))

[4] 胡仁丁. 桩底沉渣对大直径钻孔灌注桩承载力的影响分析[J]. 地下工程与隧道，2004，(3)：20–22.(HU Rending. Effect of settled material of pile bottom on bearing capacity of large diameter bored pile[J]. Undergrourd Engineering and Tunnels，2004，(3)：20–22.( in Chinese))

[5] W G K FLEMING，ELSON K. Piling engineering[M]. London： Taylor and Francis，2008：102–106.

[6] 郑刚，高喜峰，任彦华，等. 承台(基础)–桩–土不同构造形式下的相互作用研究[J]. 岩土工程学报，2004，26(3)：307–312. (ZHENG Gang，GAO Xifeng，REN Yanhua，et al. A study of the interaction of cap(foundation)，pile and soil[J]. Chinese Journal of Geotechnical Engineering，2004，26(3)：307–312.(in Chinese))

[7] 宰金珉，周峰，梅国雄，等. 自适应调节下广义复合基础设计方法与工程实践[J]. 岩土工程学报，2008，30(1)：93–99.(ZAI Jinmin，ZHOU Feng，MEI Guoxiong，et al. Design method and practice of generalized composite foundation by use of self-adaptable adjustor[J]. Chinese Journal of Geotechnical Engineering，2008，30(1)：93–99. (in Chinese))

[8] 张云军，宰金珉，王旭东，等. 按单桩极限承载力设计复合桩基时的整体承载力安全系数[J]. 岩石力学与工程学报，2004，23(增1)：4 597–4 601.(ZHANG Yunjun，ZAI Jinmin，WANG Xudong，et al. Safety factor of composite pile foundation designed based on ultimate bearing capacity of single plie[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(Supp.1)：4 597–4 601.(in Chinese))

[9] 宰金珉. 塑性支承桩—— 卸荷减沉桩的概念及其工程应用[J]. 岩土工程学报，2001，23(3)：273–278.(ZAI jinmin. Concept of plastically bearing pile and its practical application[J]. Chinese Jounal of Geotechnical Engineering，2001，23(3)：273–278.(in Chinese))

[10] 梅国雄，黄广龙，周峰，等. 桩土非线性共同作用的预压式桩筏基础施工方法：中国，200910115234.X[P]. 2009–4–23.(MEI Guoxiong，HUANG Guanglong，ZHOU Feng，et al. Nonlinear interaction of pile-soil pre-compression method for piled raft foundation construction：China，200910115234.X[P]. 2009–4–23. (in Chinese))

[11] 胡铖波，梅国雄，梅岭. 后预压法处理桩底沉渣的试验研究[J]. 工程勘察，2010，(9)：19–21(HU Chengbo，MEI Guoxiong，MEI Ling. Model test of disposing the pile bottom sediment by preloading[J]. Geotechnical Investigation and Surveying，2010，(9)：19–21.(in Chinese))