Abstract To find a convenient, economic and reliable method to measure actual grout injection rate and provide important parameters for grouting volume acceptance and quality inspection, this paper uses the digital image processing(DIP) technique to obtain information for the cross section diagram based on the section method. First it introduces basic principles and steps of this technique and discusses the feasibility of digital images for equivalently substituting the actual grouting section under the type of theoretical fracture grouting diffusion, then it analyzes the reliability of this technique through an onsite single-hole grouting test. The results show that the grout injection rate judged by the DIP technique has little variability and good repeatability, and the grouting volume calculated based on the DIP technique is about 1.1~1.2 times the measured one, showing a sound agreement between them. Lastly, in light of the advantages of Photoshop in selecting the target area and MATLAB in batch programming, this method is generalized to be more effective and suitable for engineering applications.
Abstract：
To find a convenient, economic and reliable method to measure actual grout injection rate and provide important parameters for grouting volume acceptance and quality inspection, this paper uses the digital image processing(DIP) technique to obtain information for the cross section diagram based on the section method. First it introduces basic principles and steps of this technique and discusses the feasibility of digital images for equivalently substituting the actual grouting section under the type of theoretical fracture grouting diffusion, then it analyzes the reliability of this technique through an onsite single-hole grouting test. The results show that the grout injection rate judged by the DIP technique has little variability and good repeatability, and the grouting volume calculated based on the DIP technique is about 1.1~1.2 times the measured one, showing a sound agreement between them. Lastly, in light of the advantages of Photoshop in selecting the target area and MATLAB in batch programming, this method is generalized to be more effective and suitable for engineering applications.
GUO Yan-Wei,
HE Shao-Hui,
GUAN Xiao-Ming etc
.A Measurement Method for Grout Injection Rate Based on Digital Image Processing[J] MODERN TUNNELLING TECHNOLOGY, 2015,V52(5): 95-101
2015, Vol. 52 