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（1 太原理工大學(xué)建筑與土木工程學(xué)院，太原 030024；2 中北大學(xué)土木工程系，太原 030051；3 中機(jī)國際設(shè)計研究院廣州分院，廣州 511340）

［摘要］通過在基坑支護(hù)樁中埋置應(yīng)力計，跟蹤測試基坑在開挖過程中樁身彎矩和樁頂位移的變化，研究支護(hù)樁荷載傳遞規(guī)律。同時選擇上三角、全三角、梯形三種土壓力分布模式，分別應(yīng)用土抗力法的m法、c法和k法對支護(hù)樁的樁身彎矩進(jìn)行了理論計算，并把計算結(jié)果與實(shí)測結(jié)果進(jìn)行對比分析。結(jié)果表明：對于支護(hù)樁彎矩而言，無論采用何種土壓力模式，m法的計算結(jié)果與實(shí)測結(jié)果相差較大；k法計算的最大正彎矩與實(shí)測值比較接近，但最大負(fù)彎矩偏大；c法計算的最大正彎矩偏于不安全，最大負(fù)彎矩過大。

［關(guān)鍵詞］深基坑；支護(hù)樁；m法；c法；k法

Soil resistance calculating method of deep foundation pit supporting pile and test analysis

Li Jianjun^1,2, Han Jie³, Liang Renwang¹, Bai Xiaohong¹, Han Yunshan²(1 College of Civil Engineering,Taiyuan University of Technology, Taiyuan 030024, China； 2 School of Civil Engineering, NorthUniversity of China,Taiyuan 030051,China； 3 Guangzhou Branch,CMC International Design Institute,Guangzhou 511340,China)

Abstract:Load transfer behavior of supporting pile for foundation excavation was studied through testing the change of bending moment of the pile with the deep foundation pit excavation program. Meanwhile, the moment and displacement of the pile were calculated by applying the soil resistance methods m, c and k and selecting earth pressure model of up triangle, triangle and trapezoid. The calculation and test results were compared and it got some conclusions. For the moments, the deviation of the calculation results and test results of the method m is relatively great. The results of the method k are checked fair well with the experimental data, but the maximum negative moment is bigger than measured value. The maximum positive bending moment by the method c is not safe and the maximum negative moment is so great.

Keywords:deep foundation pit; supporting pile; the method m; the method c; the method k

*山西省自然基金項(xiàng)目(2008011055)。

作者簡介：李建軍，博士研究生，Email:ljjjc@163.com。

參考文獻(xiàn)

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［2］JGJ120—99建筑基坑支護(hù)技術(shù)規(guī)程［S］. 北京：中國建筑工業(yè)出版社,1999.

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［4］楊林德. 基坑支護(hù)位移和安全性監(jiān)測的動態(tài)預(yù)報［J］. 土木工程學(xué)報, 1999,32(2)：9-13.

［5］王元湘. 深基坑擋土結(jié)構(gòu)的受力分析［J］. 土木工程學(xué)報, 1998,31(2)：12-20.