Leakage blocking construction method for injecting oil soluble polyurethane into inclined hole of upstream face of deformation joint

Abstract

The invention provides a leakage plugging construction method for injecting soluble polyurethane into an inclined hole in an upstream face of a deformation joint. The leakage plugging construction method comprises the steps of pretreatment, inclined hole positioning and drilling, grouting plugging, epoxy resin reinforcement and the like. And drilling holes at an inclination angle of 30-45 degrees, grouting oil-soluble polyurethane slurry at intervals from bottom to top in a jumping manner, and reinforcing by adopting epoxy resin after grouting to form a composite waterproof layer. The method further comprises reinforcing measures such as brushing of polyurethane waterproof paint, installation of a water stop belt and a drainage box, laying of waterproof coiled materials and the like. The construction environment needs to be dry and free of clear water, and the temperature is larger than or equal to 5 DEG C. And finally, recovering the decorative layer and the electromechanical equipment, and verifying through a 48-hour closed water test. According to the method, the inclined hole grouting technology and composite waterproof layer construction are utilized, the slurry diffusion uniformity and permeability are improved, the plugging efficiency is enhanced, the waterproof layer with high strength and good flexibility is formed, the method adapts to the special working condition of the subway tunnel, the waterproof performance of the deformation joint is remarkably improved, and the service life of the deformation joint is remarkably prolonged.

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