土遗址玻璃纤维锚杆锚固系统无损检测技术研究

发布时间：2018-05-11 07:05

本文选题：土遗址 + 玻璃纤维锚杆　；参考：《兰州大学》2017年硕士论文

【摘要】：土遗址玻璃纤维锚杆锚固系统是一种新型土遗址维修与加固构件,在加固土遗址濒危岩土体中起着十分关键的作用。土遗址玻璃纤维锚杆锚固质量的优劣直接关系到土遗址濒危岩土体的存续,因此土遗址玻璃纤维锚杆锚固质量的检测工作在土遗址维修与加固中占有十分重要的地位。当前,土遗址玻璃纤维锚杆锚固质量检测方式仍停留在具有破坏性的拉拔试验检测阶段,其检测耗时长、操作不便且对土遗址伤害较大。为了实现科学地保护土遗址,土遗址玻璃纤维锚杆锚固系统急需一种无损检测方法。本文借鉴已有的岩土锚杆无损检测方法,探究可以用于评价土遗址玻璃纤维锚杆锚固系统质量的无损检测方法。在应力波理论基础上,结合土遗址玻璃纤维锚杆锚固系统的特点,对土遗址玻璃纤维锚杆锚固系统无损检测进行了理论研究并利用试验验证了理论的可行性。研究采用模拟试验、室内试验与现场试验相结合方式,得到了适用于土遗址玻璃纤维锚杆系统检测仪器的判据。对比土遗址玻璃纤维锚杆系统拉拔试验与无损检测的检测结果,讨论了两种不同检测方法的特性。主要研究成果如下:(1)借助赫兹接触假设定义了激励指数,量化了土遗址玻璃纤维锚杆锚固系统无损检测的力学激励过程,给出了土遗址玻璃纤维锚杆系统无损检测激励端的激励控制参数;(2)通过对土遗址玻璃纤维锚杆系统应力波纵向传播理论的研究,得到了应力波在土遗址玻璃纤维锚杆系统中的传播规律,为土遗址玻璃纤维锚杆系统应力波检测提供了相应的理论依据;(3)结合土遗址玻璃纤维锚杆锚固系统理论与试验检测结果,提出了适宜的土遗址玻璃纤维锚杆锚固系统检测指标。
[Abstract]:The glass fiber bolt Anchorage system is a new type of maintenance and reinforcement component of earthen site, which plays a very important role in the reinforcement of endangered rock and soil. The quality of glass fiber bolt anchoring is directly related to the survival of endangered rock and soil, so the inspection of glass fiber anchor quality plays an important role in the maintenance and reinforcement of earth site. At present, the testing method of glass fiber anchor bolt anchoring quality is still in the stage of destructive pull-out test, which takes a long time, is inconvenient to operate and injures the earth site. In order to protect earth site scientifically, a nondestructive testing method is urgently needed for glass fiber anchor system. Based on the existing methods of nondestructive testing of rock and soil anchors, this paper explores a nondestructive testing method which can be used to evaluate the quality of glass fiber anchor system in earthen sites. Based on the stress wave theory and the characteristics of glass fiber anchor system in earthen site, the nondestructive testing of glass fiber anchor system in earthen site is studied theoretically and the feasibility of the theory is verified by experiments. By combining the simulation test, indoor test and field test, the criterion suitable for the testing instrument of glass fiber anchor system in earthen site is obtained. Compared with the results of drawing test and nondestructive testing of glass fiber anchor system in earthen sites, the characteristics of two different testing methods are discussed. The main research results are as follows: (1) with the help of Hertz contact hypothesis, the excitation index is defined, and the mechanical excitation process of nondestructive testing of glass fiber anchor system in earthen sites is quantified. In this paper, the excitation control parameters of the excitation end of the glass fiber anchor system for earthen sites are presented. The longitudinal propagation theory of the stress wave in the glass fiber anchor system of the earth remains is studied. The propagation law of stress wave in glass fiber anchor system of earthen site is obtained. This paper provides the corresponding theoretical basis for the stress wave detection of glass fiber anchor system in earthen sites. Combining with the theory and test results of glass fiber anchor system in earth ruins, the suitable testing index of glass fiber anchor system for earth remains is put forward.
【学位授予单位】：兰州大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU476;K878

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