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(浙江中大房地產(chǎn)集團(tuán)有限公司，杭州 310003)
［提要］假定樁豎向受荷達(dá)到極限承載力時(shí)樁周的土體破壞是樁土界面土體受剪破壞，土體抗剪強(qiáng)度參數(shù)即為樁極限側(cè)阻力標(biāo)準(zhǔn)值，可利用庫(kù)侖定律進(jìn)行計(jì)算。利用文中模式計(jì)算的樁側(cè)極限承載力值與靜載試驗(yàn)結(jié)果吻合良好，解釋了基樁靜載試驗(yàn)中樁側(cè)極限承載力遠(yuǎn)大于根據(jù)工程勘測(cè)報(bào)告參數(shù)計(jì)算的樁側(cè)極限承載力現(xiàn)象。
［關(guān)鍵詞］鉆孔灌注樁；側(cè)壁摩阻力；受剪破壞；庫(kù)侖定律
Ultimate Shaft Friction Calculation of Bored Castinsitu Pile/Dai Jinlin(Zhongda Real Estate Group Co.,Ltd.,Hangzhou 310003,China)
Abstract:Based on the assumption that the failure of the soil around pile is caused by the shear failure happened on the interface between the pile and soil when the ultimate vertical load is applied, and the ultimate value of lateral friction along the shaft is regarded as soil shear strength, the scenario Coulomb"s law can be used. The calculated results of the ultimate shaft resistance using the model derived are well consistent with the data of the static pile loading test, which could give a good explaination why the ultimate lateral resistance of the pile from static pile loading test is larger than the calculation from survey parameters.
Keywords:bored pile; shaft friction; shear failure; Coulomb"s law