基于试桩曲线的桩筏基础沉降实用计算方法
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李洁(1998—),女,硕士研究生,研究方向为岩土工程。E-mail:1339929653@qq.com。

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国家自然科学基金项目(41972291, 52020105003);江西省教育厅科学技术基金项目(GJJ200637)


Practical Calculation Method of Piled Raft Foundation Settlement Based on Static Load Test Curves
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    摘要:

    根据实际工程中桩筏基础沉降处于线弹性阶段的特点,从试桩曲线得到的单桩竖向刚度入手,基于相关理论和经验公式建立了桩筏基础整体竖向刚度的计算方法,并在此基础上给出了在设计荷载作用下桩筏基础平均沉降的实用计算方法。通过对软土地区及黄土地区高层建筑基础、嵌岩桩基础及大型交通工程 4 大类 8 个工程实例的现场实测结果对比分析,计算沉降值基本为实测沉降的 0.8~1.5 倍,验证了所提出的沉降计算方法的可靠性,可为实际桩筏基础初步设计中的沉降计算提供参考。

    Abstract:

    In view of the characteristics that the settlement of pile raft foundation is in the linear elastic stage under design load, based on the vertical stiffness of single pile obtained from the static load test curve, relevant theories and empirical formulas, the calculation method of the overall vertical stiffness of pile raft foundation is established. On this basis, the practical calculation method of the average settlement of pile raft foundation under working load is proposed. Through the comprehensive analysis of the field measurement and calculation results of 8 engineering cases in 4 categories of high-rise building foundation in soft soil area and loess area, rock-socketed pile foundation and large traffic engineering, the validity of the proposed method is examined. The calculated settlement value is basically 0.8~1.5 times of the measured settlement, which verifies the reliability of the proposed settlement calculation method in practical engineering. In addition, the calculation method can provide reference for the preliminary design of settlement calculation of actual pile raft foundations.

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李洁,罗如平,朱碧堂.基于试桩曲线的桩筏基础沉降实用计算方法[J].华东交通大学学报,2022,39(5):20-28.

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  • 在线发布日期: 2022-10-28
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