Tension tests on smooth and rough model piles in dry sand
Tension tests on smooth and rough model piles in dry sand
复制标题
DOI：
10.1139/t98-104
复制
发表时间：
1999-11
影响因子：
3.6
通讯作者：
A. Alawneh;A. Malkawi;Husein Al-Deeky
中科院分区：
文献类型：
--
作者：
A. Alawneh;A. Malkawi;Husein Al-Deeky
为了确定影响干砂条件下桩抗拔极限阻力的重要因素，对外径41 mm和61 mm两种规格的开端和闭端粗端和光滑端模型桩进行了64次拔桩试验。模型桩采用静压顶桩和打桩两种方式安装在中密、致密砂土中，埋深为0.8 m。砂容器采用尺寸为1.1 × 1.1 × 1.3 m的刚性钢箱。研究结果表明：桩位方式、初始砂况、桩面粗糙度、桩端类型都是影响干砂中单桩极限抗拔桩阻力的显著变量（由大到小）。总体而言，封闭式桩的桩身阻力比开放式桩增加了24%，在密集区，打入模型桩的平均单位桩身阻力是静压模型桩的1.33倍。
In order to delineate the significant variables affecting the ultimate uplift shaft resistance of a pile in dry sand, a testing program comprising 64 pullout tests was conducted on open- and closed-ended rough and smooth model piles of two sizes (41 and 61 mm outside diameter). The model piles were installed in medium dense and dense sand to an embedded depth of 0.8 m using two methods of pile placement, static jacking and driving. A rigid steel box measuring 1.1 × 1.1 × 1.3 m was used as a sand container. The results obtained from this study indicated that pile placement method, initial sand condition, pile surface roughness, and pile end type are all significant variables (given in descending order) affecting the ultimate uplift shaft resistance of a single pile in dry sand. Overall, the closed-ended piles showed a 24% increase in shaft resistance compared with the open-ended piles and the average unit shaft resistance of the driven model pile was 1.33 times that of the jacked model pile in the dense sa...