Crack Monitoring and Maximum Crack Width Prediction Method for Prefabricated Pipe Gallery
A technology of crack width and prediction method, applied in measurement devices, buildings, artificial islands, etc., can solve problems such as non-uniform settlement, earthquake load water and soil pressure, and inability to accurately predict the maximum crack position.
Active Publication Date: 2021-10-01
GUANGXI ROAD & BRIDGE ENG GRP CO LTD
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[0007] The purpose of the present invention is to aim at the fact that the pipe gallery in the prior art bears unpredictable loads during use, including uneven settlement, seismic load, water and soil pressure, etc., that is to say, it is impossible to accurately determine the crack monitoring point Predict the position of the largest crack that may appear in the future, so the crack monitoring point may not be the actual location of the largest crack, and provide a method for monitoring internode cracks and predicting the maximum crack width of the prefabricated pipe gallery
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[0037] Such as Figure 1-3 As shown, a method for monitoring internode cracks in a prefabricated pipe gallery and predicting the maximum crack width according to the present invention includes the following steps:
[0038] Step 1. Select the three locations where the maximum crack width may appear in the same cross-section of the pipe gallery shown by the finite element calculation results under the action of the basic load combination as the three crack monitoring points. Three crack monitoring points are arranged at any position on the surface, at any position on the bottom surface, and in the middle of the web; several monitoring sections are set along the axis of the pipe gallery, each monitoring section includes the above three crack monitoring points, and the monitoring section is selected on the worst foundation If the foundation conditions are basically the same in the same area, the monitoring section of the pipe gallery with a certain number of segments can be arrang...
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The invention discloses a method for monitoring inter-node cracks of an assembled pipe gallery and predicting the maximum crack width, which can perform automatic monitoring and early warning of inter-node cracks in a pipe gallery, and realize real-time transmission of crack monitoring data to a cloud platform for display and data analysis; Based on the principle of determining a plane with three points, a prediction method for cracks in the entire section of the pipe gallery based on three-point test data is established, which effectively avoids the problem that the cracks in the entire section cannot be reflected due to insufficient test points. In addition, it can be based on the crack distribution of the entire section The situation can predict the maximum crack position and its width, and then determine the distribution of the maximum crack width along the axis. According to the distribution function, the maximum crack width and corresponding position can be obtained. The core lies in the solution of the multivariate equation.
Description
technical field [0001] The invention relates to the field of pipe galleries, in particular to a method for monitoring internode cracks of an assembled pipe gallery and predicting the maximum crack width. Background technique [0002] Prefabricated technology has been more and more widely used in the construction of pipe gallery. The construction technology of prefabricated pipe gallery has the advantages of high construction quality, fast installation speed, less on-site consumables, and high degree of civilization and environmental protection. However, the long-term There are still uncertainties in the service performance, especially for the comprehensive pipe gallery rich in groundwater below the surface, if the connection between the pipe gallery sections is not properly handled, it is very likely to cause cracks and water seepage between the pipe gallery sections, seriously affecting the pipe gallery. Therefore, it is necessary to monitor the mechanical performance of th...
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IPC IPC(8): E02D29/045G01B21/00G01B21/04
CPCE02D29/10G01B21/00G01B21/04
Inventor 解威威王建军韩玉刘卓刘营唐睿楷叶志权曹璐梁厚燃郑健李彩霞刘祥侯凯文胡以婵赵婷婷
Owner GUANGXI ROAD & BRIDGE ENG GRP CO LTD