Existing railroad bed grouting effect evaluation method based on natural source resonance imaging

• Main Authors: HUANG DAZHONG, ZHOU XUEMING, QIN HAIXU, ZHANG NING, QI CHUNYU, LI GUOHE, XU GUANGCHUN, NIU YONGXIAO, LANG YAJUN, LIU ZHENMING, CHEN CHENGSHEN, SONG XIANGYU, WANG GUANCHAO, QI XIAOYU, MA PENGCHENG
• Format: Patent
• Language: Chinese; English
• Published: 17.11.2023
• Subjects: DETECTING MASSES OR OBJECTS; GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; MEASURING; PHYSICS; TESTING

The invention discloses an existing railroad bed grouting effect evaluation method based on natural source resonance imaging, which comprises the following steps of: acquiring natural source vibration data, and performing noise suppression, track equalization, characteristic frequency extraction, imaging inversion and elevation correction to obtain the grouting effect of an existing railroad bed. Determining an impedance value of a section, which does not need to be treated, of the existing railroad bed, impedance values of the treated section before and after grouting, and a uniformity coefficient of the treated section after grouting, calculating a grouting effect improvement coefficient, and further evaluating the grouting effect of the existing railroad bed. Equipment used in the method is light, flexible to place, free of damage to a roadbed body, nondestructive testing is achieved, calculation is convenient and fast, precision is high, efficiency is high, cost is low, the method has obvious advantages i