摘要
为了对X形混凝土桩荷载传递机理有更深入的认识,以自行研发的大型土工试验模型槽为依托,进行了X形混凝土桩、同外包直径圆形桩的静载荷对比试验.利用埋设在X形混凝土桩中的监测仪器对桩身轴力、桩端阻力以及桩体沉降等进行了直接量测,分析比较了在桩顶竖向荷载作用下X形混凝土桩与同外包直径圆形桩的荷载-沉降曲线、侧阻力及端阻力的发挥、桩身侧阻力的分布等.试验结果表明:X形混凝土桩中出现了类似于H形桩的"半封闭土塞"及X形混凝土桩的桩端阻力承载力系数小于圆形桩的情况,体现了X形混凝土桩截面形状的影响.
In order to deeply understand the load transfer mechanism of X-shaped concrete piles under vertical loads, static load tests of X-shaped concrete piles and circular piles were performed in the test room developed for large-scale tests. The axial force, end resistance and settlement of the X-shaped concrete piles were directly measured with the pre- arranged instruments. The load-settlement curves, the development of skin friction and end resistance as well as the distribution of shaft resistance along the pile depth were compared. The test results show that the X-shaped concrete piles exhibit a similar partial soil plug to the H-shaped piles, and the bearing capacity factor of end resistance of the X-shaped concrete piles is smaller than that of the circular piles, indicating the effect of the X-shaped section.
出处
《河海大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第2期206-210,共5页
Journal of Hohai University(Natural Sciences)
关键词
X形混凝土桩
试验分析
侧阻力
端阻力
X-shaped cast-in-place pile
test analysis
skin friction
end resistance
