Tension tests on bored piles in cemented desert sands
Tension tests on bored piles in cemented desert sands
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DOI：
10.1139/t94-070
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发表时间：
1994-08
影响因子：
3.6
通讯作者：
N. Ismael;H. Al-Sanad;F. Al-otaibi
中科院分区：
文献类型：
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作者：
N. Ismael;H. Al-Sanad;F. Al-otaibi
通过两个现场试验，研究了中密度胶结砂土中钻孔灌注桩的荷载传递规律。在第一个工地，对两根钻孔桩进行了轴向拉伸破坏试验。其中一根桩用应变计测量了在所有荷载增量下的轴向荷载分布。结果表明，荷载沿桩长传递明显。在中密、特密、弱胶结钙质砂岩中测得的平均轴阻分别为80kN/m2和100kN/m2。在第二个工地，进行了钻孔桩在无胶结无粘性砂土中的拉伸试验。通过两个场地的结果比较，评估了胶结作用对抗拔能力的影响。竖井阻力取决于许多因素，包括相对密度、胶结程度、土质结构和施工方法。它随着标准贯入试验(SPT)N值的增加而增加；然而，SPT不被认为是水泥砂强度表征的可靠试验。分析..。
The load transfer of bored piles in medium dense cemented sands was examined by field tests at two sites. At the first site, two bored piles were tested in axial tension to failure. One pile was instrumented with strain guages to measure the axial load distribution at all load increments. The results indicate significant load transfer along the pile length. The average shaft resistance measured was 80 and 100 kN/m2 in medium-dense and very dense, weakly cemented calcareous sand, respectively. At the second site, a tension test was carried out on a bored pile in uncemented cohesionless sand. By comparing the results at the two sites the influence of cementation on the uplift capacity was assessed. The shaft resistance depends on many factors including the relative density, degree of cementation, soil fabric, and method of construction. It increases with the standard penetration test (SPT) N values; however, the SPT is not considered a reliable test for strength characterization of cemented sands. Analysis ...