Reinforcement and repair technology of steel sleeve and grouting in wharf pile foundation
In response to the problem of damage and cracks in the pile foundation concrete of wharf that is in service for many years,relying on the hydraulic overhaul project of a certain wharf in Ningbo,we carry out the design and development of steel sleeve,grouting operation system,and ultra early strength grouting material.Combining with the construction process,we form a complete set of reinforcement and repair technology,and carry out the on-site construction and quality test.The results show that the compressive strength of the ultra-early strength grouting material can reach over 20 MPa within 12 hours,and its bonding strength with the steel sleeve can reach over 6 MPa.Other performance parameters comply with the requirements of the specification.The developed complete technology is used to successfully reinforce and repaire 232 pile foundations within 6 months.
pile foundationreinforcement and repairsteel sleevegrouting operation
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维普
