A non-destructive testing and analysis method for the fullness of rock wall beam bolts
A technology of non-destructive testing and analysis methods, which is applied in the use of sound waves/ultrasonic waves/infrasonic waves to analyze solids and the preparation of test samples. It can solve problems such as complex waveforms, inability to judge construction quality, and difficult analysis, etc., to improve accuracy, The effect of meeting the needs of engineering evaluation
Active Publication Date: 2022-08-05
CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION +1
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Problems solved by technology
When the length of the free end exposed outside the rock mass is too long, the waveform of non-destructive testing is complex, the regularity is poor, and the analysis is difficult. It cannot truly and accurately reflect the anchoring quality of the bolt, and cannot judge the construction quality
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[0024] The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application. It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.
[0025] The terms "comprising", "comprising" or any other variation thereof are intended to encompass non-exclusive inclusion such that a process, method, article or device comprising a list of elements includes not only those elements, but also other not expressly listed elements, or also include elements inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element. ...
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Abstract
The present application relates to a method for non-destructive testing and analysis of the fullness of rock wall beams and bolts, including steps 1. constructing test bolts in an area with the same geological conditions near the rock wall beams; step 2. detecting the attenuation coefficient η of each test bolt; 3. Truncate all the test bolts in 5 times, repeat step 2 for attenuation coefficient detection; step 4 according to the exposed length L of the truncated bolt 0 Make a scatter plot with the corresponding attenuation coefficient η and the fullness D of the test bolt; Step 5. Obtain the fullness D of the bolt and the exposed length L of the bolt 0 , the fitting surface relationship between the attenuation coefficient η; step 6. Measure the actual exposed length, and combine the attenuation coefficient into the relationship in step 5 to calculate the fullness of the bolt. The invention can overcome the influence of complex non-destructive testing waveforms, poor regularity, and inability to truly and accurately reflect the fullness of the rock bolts caused by excessively exposed rock wall beam bolts, improve detection accuracy, judge construction quality, and have great significance for engineering safety.
Description
technical field [0001] The present application relates to the technical field of test detection and analysis of construction quality in hydropower and water conservancy projects, in particular to a method for nondestructive detection and analysis of the fullness of rock wall beams and bolts. Background technique [0002] In underground caverns of hydropower and water conservancy projects, after drilling holes in the rock mass, the bolts are inserted into them and injected with cement mortar for anchoring. Due to the heavy load of the crane, the rock wall beam anchor rod must have sufficient length to be respectively anchored to the rock mass and rock wall beam concrete, which leads to the excessive length of the free end of the rock bolt exposed outside the rock mass. [0003] According to the requirements of relevant specifications, before pouring the concrete of the rock wall beam, it is necessary to test the fullness of the bolt to judge the construction quality of the bo...
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IPC IPC(8): G01N29/11G01N1/28
CPCG01N29/11G01N1/286G01N2001/2866G01N2001/2873
Inventor 张晓波张晖郭凯张振忠周刚石正国英鹏涛肖开涛张琪琦殷海波黄鹤程李洋黄宇飞史云吏蒋科曾欣陈薇袁俊杨雪枫
Owner CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION