Abstract: When a tunnel in Guizhou passed through the coal measure strata with high water pressure during con? struction, it encountered the problem of the inverted arch heaving. This paper analyzes the causes of the tunnel inverted arch heaving through on-site observation and monitoring of the lining structure deformation, combined with numerical simulation. The results show that the rock softening at the base and high water pressure are the two main factors for the heaving of the tunnel inverted arch, and the former has a greater impact on the safety of the inverted arch structure. Combined with the engineering characteristics and the causes of the disease, comprehensive remediation measures are taken at the site, such as installing additional discharge holes at sidewalls, horizontal and vertical drain pipes to strengthen the drainage system and reduce the water pressure, installing perforated grouting pipes at the arch foot to strengthen the bedrock at the base and replacing the arch structure, etc., achieving good remediation results.