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工程科学与技术:2010,42(3):95-100
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基于现场抗拔试验的锚索动态反馈设计法
(1.四川大学建筑与环境学院;2.同济大学 地下建筑工程系)
A Dynamic Feedback Design Method of Anchorage Cable Based on On-site Pullout Test
(1.School of Architecture and Environment,Sichuan Univ.;2.Dept. of Geotechnical Eng.,Tongji Univ.)
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投稿时间:2009-02-22    修订日期:2010-04-07
中文摘要: 为建立一种比常用均匀设计法和基于积分原理的非均匀设计法更易获得可靠设计参数的新锚索设计方法,基于锚索的荷载传递原理和锚固段注浆体与围岩接触面的本构模型,推导了比较符合工程实际的锚索P-S理论曲线关系,并在此基础上提出了锚索的动态反馈设计法,给出了详实的实施路径和算法示例。该法的设计参数,如锚固段接触刚度、接触面弹性剪切位移等,通过在施工中不断进行、且能综合反映复杂工程条件的现场抗拔试验所获P-S曲线求得,并能进行基于允许塑性变形的定量设计。算例结果表明,传统均匀设计法获得的设计结果往往比较保守,而该法所获设计参数和设计结果更为合理,值得在更多工程实践中检验甚至推广应用。
Abstract:To establish a new design method of anchorage cable that is more dependable or reliable than the commonly used uniform design method and the integral principle based non uniform design method, the theoretical P-S relationship of anchorage cable, which is accordant with some P-S curves gained from on site pullout test, was deduced and investigated, basing on load transfer principle and constitutive model of interface between mortar and surrounding rock or soil. An on site pullout test based design method, as a dynamic feedback design method, was proposed. The design parameters in this method, such as contact rigidity and elastic shear displacement of interface between mortar and surrounding rock or soil, were calculated from P-S curve obtained from on-site pullout test that can synthetically embody complex engineering conditions, and quantitative design permitting plastic yielding of interface is viable. To demonstrate the realization approach of the new design method, a calculation example was given. The result showed that the new design method is more sound or rational than the conservative and traditional uniform design method,although its practical application in engineering may need further tests in the future.
文章编号:200900134     中图分类号:    文献标志码:
基金项目:国家自然科学基金、二滩水电开发有限公司联合基金资助项目(50579093); 四川大学青年教师科研启动基金资助(2009SCU11049)
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向安田,朱合华,李碧雄.基于现场抗拔试验的锚索动态反馈设计法[J].工程科学与技术,2010,42(3):95-100.
Xiang Antian,Zhu Hehua,Li Bixiong.A Dynamic Feedback Design Method of Anchorage Cable Based on On-site Pullout Test[J].Advanced Engineering Sciences,2010,42(3):95-100.