静钻根植竹节桩荷载传递机理模型试验

发布时间：2018-03-23 08:20

本文选题：静钻根植工法　切入点：竹节桩　出处：《浙江大学学报(工学版)》2015年03期 　论文类型：期刊论文

【摘要】：针对静钻根植竹节桩这种新型组合桩基的荷载传递机理的问题,在模型槽中进行竹节桩的模型试验.通过埋设在竹节桩表面与水泥土中的应变片及桩底的土压力传感器对加载过程中桩身、桩端以及水泥土中的应力进行测量.模型试验结果表明:桩侧水泥土与桩端水泥土在荷载传递过程中所起作用不同,靠近桩端水泥土处桩侧水泥土中应力较大,在实际工程中需要提高该区域水泥土强度;模型试验测得的水泥土与桩周土极限侧摩阻力比现场试桩水泥土与桩周土的极限侧摩阻力大,在实际工程中搅拌水泥土时应提高搅拌均匀性以增加桩侧摩阻力;可以用传统桩基沉降计算公式计算静钻根植竹节桩的桩端沉降.
[Abstract]:Aiming at the problem of load transfer mechanism of a new type of composite pile foundation, the static drill root planting bamboo section pile, The model test of the slub pile was carried out in the model slot. The strain gauge embedded in the surface of the slub pile and the cement soil and the earth pressure sensor at the bottom of the pile were applied to the pile during the loading process. The model test results show that the effect of pile-side cement-soil and pile-end cement-soil is different in the process of load transfer, and the stress in pile-side cement-soil near the pile-end is larger than that in pile-side cement-soil. It is necessary to improve the strength of cement soil in this area in actual engineering, and the ultimate side friction of cement soil and soil around pile measured by model test is greater than that of cement soil and soil around pile in situ. When mixing cement soil in actual engineering, the mixing uniformity should be improved to increase the frictional resistance of pile side, and the pile tip settlement of static drilling and planting bamboo-shaped pile can be calculated by traditional formula of pile foundation settlement.
【作者单位】：浙江大学滨海与城市岩土工程研究中心;浙江大学软弱土与环境土工教育部重点实验室;浙东建材集团;
【基金】：国家自然科学基金资助项目(51278450);国家自然科学基金资助项目(51378464)
【分类号】：TU473.1

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