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(1 河南工業(yè)職業(yè)技術(shù)學(xué)院建筑工程系， 南陽 473000； 2 上?，F(xiàn)代建筑設(shè)計(jì)集團(tuán)申元巖土工程有限公司， 上海 200001)

［摘要］在自重濕陷性黃土地區(qū)，通過現(xiàn)場(chǎng)試驗(yàn)及監(jiān)測(cè)對(duì)比了普通灌注樁和樁端后注漿灌注樁在設(shè)計(jì)荷載作用下的樁身軸力和樁側(cè)阻力的變化情況，并通過樁基（豎向）靜荷載試驗(yàn)對(duì)各試驗(yàn)樁進(jìn)行了承載力檢測(cè)。結(jié)果表明，位于該濕陷性黃土場(chǎng)地的干作業(yè)鉆孔灌注樁在后注漿后承載力明顯提高，樁身中性點(diǎn)位置下降，同時(shí)提供了樁端后注漿灌注樁承載力估算時(shí)樁側(cè)阻力增大系數(shù)的取值。

［關(guān)鍵詞］濕陷性黃土； 樁基； 后注漿； 靜荷載試驗(yàn)； 中性點(diǎn)； 樁側(cè)阻力增大系數(shù)

中圖分類號(hào)：TU473-1文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2016)16-0097-04

Experimental test on post grouting filling pile in collapsible loess

Liu Tianjie1， Wang Yan1， Liu Kun2

(1 Department of Architectural Engineering, Henan Polytechnic Institute of Architectural Engineering, Nanyang 473000， China;2  Shen Yuan Geotechnical Engineering Co., Ltd., Shanghai Modern Architectural Design Group, Shanghai 200001, China)

Abstract:In the self weight wet collapsible loess area, field test and monitoring were carried out to compare changes of pile body axial force and pile side frictional resistance of the common filling pile and the pile end post grouting filling pile under the design load. And the bearing capacity tests were carried out on test piles through pile foundation (vertical) static loading test. The results show that the bearing capacity of dry drilling filling pile in the wet collapsible loess area is significantly improved after grouting and the neutral point of pile body decreases. At the same time, the value of pile side friction resistance enhancement coefficient is provided in  bearing capacity estimation of pile end post grouting filling pile.

Keywords:collapsible loess; pile foundation; post grouting; static load test;  neutral point; pile side resistance enhancement coefficient

作者簡(jiǎn)介：柳天杰，碩士，講師，一級(jí)建造師，Email:ltj821203@126.com。