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(同濟(jì)大學(xué)地下建筑與工程系，上海 200092)
［提要］對(duì)樁端周圍土體的性狀進(jìn)行了分析，引入考慮樁端土體壓縮特性雙曲線函數(shù)，將樁端阻力的發(fā)揮同樁的刺入變形聯(lián)系起來。采用考慮樁端土體可壓縮特性的雙曲線函數(shù)，對(duì)上海地區(qū)砂性端承土及現(xiàn)場(chǎng)試樁中端阻力與刺入變形關(guān)系進(jìn)行了分析，結(jié)果表明模式是可行的。但在許多方面仍有不確定性，有待深入的研究。
［關(guān)鍵詞］刺入；樁端阻力；雙曲線函數(shù)；球孔擴(kuò)張；壓碎性
Preliminary Research on Resistance of Pile Tip Based on Penetration Displacement of Pile Base/Ye Jianzhong,Zhou Jian(Department of Geotechnical Engineering, Tongji University,Shanghai 200092,China)
Abstract:According to analysis of the behavior of sand surrounding pile tips, a hyperbolic function is presented considering the compressibility of soil around pile tip which establishes certain relation between end bearing capacity and penetration at pile base.It is verified that application of the proposed model in piles supported by typical Shanghai soils gives satisfactory results.However,there are many uncertain factors which limit the accurate determination of relationship between pile tip resistance and normalized settlement.Further research is needed for the rational evaluation of pile loadsettlement behavior.
Keywords:penetration; end bearing capacity; hyperbolic function; cavity expansion; curshability
*國家自然科學(xué)基金資助項(xiàng)目(50578122)。