Nondestructive test method for testing tension of prestress anchorage system
A nondestructive testing and prestressing technology, which is applied in the direction of applying repetitive force/pulsation force to test the strength of materials, etc., can solve the problems that the prestressing system cannot use nondestructive methods and measure tension, and achieve the effect of convenient testing
Active Publication Date: 2010-03-17
四川升拓检测技术股份有限公司 +2
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Problems solved by technology
[0049] The technical problem to be solved in the present invention is that the tension of the prestressed system hidden in the structure cannot be measured by a non-destructive method. The head / bolt strikes the vibration and induces free vibration, and then tests its response characteristics to measure its tension, and develop a non-destructive testing method for the tension of the prestressed system
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[0079] refer to figure 1 To Figure 3A and B, it shows the schematic diagram of the prestressed anchorage system structure under the general concept, and also to show the schematic diagram of the basic principle of the tension test of the prestressed system, and the schematic diagram of the vibration system under high and low stress, refer to Figure 4 It shows the connection schematic diagram of the tension test of the prestressed anchorage system described in the present invention. In this embodiment, the connection is performed according to the following steps. In the figure 1 is the bolt tension tester, 2 is the exposed length of the anchor cable, 3 is the acceleration sensor connected to the tension tester by the signal cable, 4 is the anchor with the clip installed, and 5 is the vibrating hammer , 6 is the backing plate.
[0080] a. Install the acceleration sensor on the anchor head fixture and the vibrating hammer at the end of the prestressed system (such as anchor rod...
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Abstract
The invention relates to a nondestructive test method for testing tension of a prestress anchorage system, belonging to the technical field of engineering construction quality test. The method is operated as the following steps: mounting an acceleration sensor; testing the response property of the sensor by the excitation of an exciting hammer; demarcating parameters and measuring tension; and computing tension with reference to a formula. The method for testing tension of the prestress anchorage system solves the problem that the previous prestress anchorage system can not implement nondestructive test, and simultaneously, striking excitation and vibration response test are both performed on the anchor head of the prestress anchorage system, therefore, the test is convenient and fast, andthe tension of the system can be calculated from the measured parameter conveniently.
Description
technical field [0001] The invention belongs to the technical field of engineering construction quality inspection, and in particular relates to a nondestructive inspection method for testing the tension of a prestressed anchorage system based on an excitation response. Background technique [0002] With the rapid development of my country's basic engineering construction projects, prestressed systems have been more and more used in various civil engineering, construction, road and bridge, water conservancy projects in the main structure, slope treatment, large underground caverns and deep foundation pits Support and other projects are under construction. The tension of the prestressed system directly affects its anchorage quality and is the most important design and construction index. However, due to various reasons, after a certain period of time, the prestressed system will relax, that is, its tension will gradually decrease, which will affect the anchoring and support e...
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IPC IPC(8): G01N3/34G01N3/38
Inventor 吴佳晔胡祖光徐建达季文洪田北平杨超沈卓洋丝贺裕美吴曾炜
Owner 四川升拓检测技术股份有限公司