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(河北北方綠野建筑設(shè)計(jì)有限公司， 石家莊 050011)

［摘要］通過對(duì)實(shí)際工程中相同場(chǎng)地條件下抗壓基樁按不注漿、僅樁端注漿、樁端樁側(cè)復(fù)式注漿3種工況的抗壓承載力測(cè)試結(jié)果以及抗拔基樁按不注漿、僅樁側(cè)注漿兩種工況的抗拔承載力測(cè)試結(jié)果的對(duì)比分析，得到后注漿灌注樁承載力綜合提高系數(shù)（注漿后樁實(shí)測(cè)承載力特征值與不注漿樁計(jì)算承載力特征值的比值）實(shí)測(cè)值，為石家莊地區(qū)合理采用后注漿灌注樁承載力綜合提高系數(shù)的取值提供工程依據(jù)。同時(shí)，通過對(duì)上述各試樁樁側(cè)埋設(shè)的鋼筋計(jì)的測(cè)試結(jié)果分析，得到不同土層在注漿后的極限側(cè)阻力增強(qiáng)系數(shù)，并據(jù)此推斷出抗壓樁端阻力增強(qiáng)系數(shù)，從而得出實(shí)測(cè)值與規(guī)范值間的對(duì)應(yīng)關(guān)系，供工程應(yīng)用參考。

［關(guān)鍵詞］后注漿抗壓灌注樁; 后注漿抗拔灌注樁; 樁側(cè)阻力增強(qiáng)系數(shù); 樁端阻力增強(qiáng)系數(shù)

中圖分類號(hào)：TU473.1+6      文獻(xiàn)標(biāo)識(shí)碼：A      文章編號(hào)：1002-848X(2014)01-0066-07

Test research on value of side resistance improvement coefficient and end resistance improvement coefficient of post grouting filling piles in Shijiazhuang area

Zhang Lixin

(Hebei N. Green Architectural Design Co., Ltd., Shijiazhuang 050011, China)

Abstract: Based on the three working conditions of compressive piles, not grouting, pile end grouting only, and pile end pile side complex grouting on same site conditions in practical projects, compressive strength test results of compressive piles were obtained and compared with uplift bearing capacity test results of uplift piles in two working conditions of not grouting and pile side grouting only. Comprehensive improvement coefficient of post grouting filling pile bearing capacity（ratio of the measured bearing capacity characteristic values of the pile after grouting and calculated bearing capacity characteristic values of the pile without grouting）was obtained from above results comparisons, which provides engineering basis for rational use of improvement coefficient in Shijiazhuang area. At the same time, through the analysis of test results of rebar meter buried under lateral side of test pile, side resistance improvement coefficient of the pile in different soil layers after grouting was obtained. Then, end resistance improvement coefficient of the compressive pile was inferred. Corresponding relationship between the measured parameter value and code parameter value was clarified, which provides reference for engineering application.

Keywords: post grouting compressive filling pile; post grouting uplift filling pile; side resistance improvement coefficient of the pile; end resistance improvement coefficient of the pile

作者簡(jiǎn)介：張利新，學(xué)士，正高級(jí)工程師，一級(jí)注冊(cè)結(jié)構(gòu)工程師，Email：zhlx3368@126.com。

參考文獻(xiàn)

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