原位载荷试验确定复合地基承载力方法研究

发布时间：2018-02-28 11:19

本文关键词： 原位载荷试验复合地基素混凝土桩复合地基地基承载力　出处：《岩土力学》2014年S2期 　论文类型：期刊论文

【摘要】：原位载荷试验是确定复合地基竖向承载力最可靠的方法。许多工程实例表明,当载荷试验加载不充分,无法通过极限荷载判断地基承载力特征值时,应根据《建筑地基处理技术规范》方法确定复合地基承载力特征值,但该值有时会偏小,这样的结果会导致设计人员采用的复合地基承载力特征值偏低,设计过分保守,由此造成技术投入加大,工程造价增加的不良结果。通过某工程同场地、同条件的一组素混凝土桩复合地基原位载荷试验数据与一组天然地基原位载荷试验数据对比,研究原位载荷试验测定复合地基承载力特征值方法的不足,讨论产生缺陷的原因。补充完善了《规范》通过载荷试验确定复合地基承载力确定方法,以期更好地促进复合地基技术及原位载荷试验的推广应用。
[Abstract]:In-situ load test is the most reliable method to determine the vertical bearing capacity of composite foundation. Many engineering examples show that when the loading of load test is insufficient, it is impossible to judge the bearing capacity characteristic value of foundation through ultimate load. The bearing capacity eigenvalue of composite foundation should be determined according to the method of "Technical Code for Building Foundation treatment", but sometimes the value will be small. This result will lead to the low eigenvalue of bearing capacity of composite foundation adopted by designers, and the design is too conservative. As a result, the technical input is increased and the project cost is increased. By comparing the in-situ load test data of a group of plain concrete pile composite foundation with a group of natural foundation in-situ load test data of the same site and the same conditions, a group of natural foundation in-situ load test data are compared. This paper studies the deficiency of the method of measuring the bearing capacity eigenvalue of composite foundation by in-situ load test, and discusses the causes of the defects. The method of determining the bearing capacity of composite foundation by loading test is supplemented and perfected. In order to better promote the application of composite foundation technology and in-situ load test.
【作者单位】：昆明理工大学土木工程学院土木工程系;
【基金】：云南省人才培养项目(No.KKSY201306106)
【分类号】：TU470

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