摘要
通过深厚老沉积土地区钢管桩的压桩试验、拔桩试验和桩身轴力试验，探讨了深厚老沉积土地区钢管桩压桩和拔桩的土阻力分布规律，得出如下结论：深厚老沉积土地区钢管桩压桩状态下侧阻力均值为76．79MPa，比一般黏性土高27．5％～30．6％；老沉积土拔桩状态下的侧阻力值达到42．4～52．8MPa；老沉积土拔桩侧阻力和压桩侧阻力的比值均值为0．84，比一般黏性土值要高5％；老沉积土压桩和拔桩侧阻力较为恒定，随着土层埋深和土层厚度的变化较小。这对深厚老沉积土地基中钢管桩的理论研究和工程应用具有指导作用。
Based on the result of pile pressing test, pile pulling test and axial force test, we probe into the distribution law of shaft friction on compressive and tensile load of steel tube piles in deep old deposited soil and draw the conclusions as follows： The mean shaft friction of steel tube pile under compressive load in deep old deposited soil area can reach 76. 79 MPa and is about 27.5% - 30. 6% higher than ordinary clay. The shaft friction of steel tube pile under tensile load can reach 42. 4 - 52.8 MPa. The mean shaft friction of steel tube pile under tensile load is 0. 84 times of its under compressive load and about 5% higher than ordinary clay. Along with the increase of penetration and soil thickness, the shaft friction of steel tube pile under compressive and tensile load changes slowly. The research result provides an instruction to the theoretical research and engineering practice of steel tube piles in old deposited soil.
出处
《水运工程》
北大核心
2015年第3期165-170,共6页
Port & Waterway Engineering
关键词
深厚老沉积土地基
钢管桩
侧阻力
承载力性能
old deposited soil foundation
steel tube pile
shaft friction
bearing performance
作者简介
冯光华（1984-），男，硕士，工程师，从事桩基检测与科研工作。
