Research on Fracture Mechanism and Repair Technology of Pipe Corridor Structure in Rich Water Stratum

Affected by material type, construction technology, construction quality and late external environmental load, urban underground comprehensive pipe corridor is prone to structural cracks, leakage and other diseases. Based on a water-rich strata integrated pipe corridor project in Jinan City, this paper carried out the detection and analysis of the health state of the structure of the pipe corridor project, and identified the disease characteristics of the structure mainly vertical cracks. On this basis, ABAQUS finite element software was used to simulate and analyse the cracking response law of the structural sidewalls under different concrete linear expansion coefficients and pipe section casting lengths, and reveal the distribution pattern of the sidewall cracks and the stress evolution characteristics. Finally, a new modified epoxy repair plugging material was developed and proposed. Through uniaxial compression test and dry-wet bonding test of the new material, the repair mechanism of the new material to the cracks of concrete structure was revealed, and the plugging application of pipe corridor cracks was carried out in the field. The research results of this paper can provide some theoretical and technical references for the prevention and control of structural cracks in the integrated pipe corridor in water-rich strata.