A new technology of multi-box asynchronous loading was pioneered and invented, thereby extending the self-balanced testing method for pile foundations, solving thepost-groutingproblem of bearing capacity testing of deep and long large-diameter piles under complex environments, and overcoming the difficulty of organically unifying the safety and economy of deep and long pile foundation engineering. For the first time in expressway construction, post-grouting at the pile tip was adopted on a large scale to replace pile length, effectively shortening the pile length by more than 20,000 meters and saving about 59.23 million yuan in project cost.

An intelligent pile-tip post-grouting system was developed, a complete set of process standards was formulated, design standards for pile-tip post-grouting under coastal conditions were proposed, and digital management of the concealed grouting works was realized for the first time.

A dual-method monitoring and bidirectional matching technology was invented and applied to the prefabrication of segmental girders; a new pier-top segment positioning technology based on Cartesian coordinates and a new guided fine-tuning process were pioneered, achieving "millimeter-level" closure of segmental girders in shim-free cantilever assembly; a dedicated four-dimensional matrix 4DM safety supervision system for segmental girder launching gantries was developed, filling a gap in the industry and successfully forging the engineering quality of "millimeters achieving ten thousand meters," laying the foundation for the promotion and application of the short-line method precast assembly process for bridges.

A bidirectional electromigration technology for concrete structures — "chloride removal, rust inhibition, crack repair and nano-reinforcement" — was pioneered, solving the technical challenge of controlling the hydrogen embrittlement risk of steel reinforcement, breaking through the restriction on the application of electrochemical technology in prestressed concrete structures, achieving a fivefold increase in the critical current density for hydrogen evolution, and successfully applying it to the box girders and pier bodies of sea-crossing bridges, greatly extending the service life of structures in marine areas, with the durability enhancement technology reaching the international leading level.

A deformation-body-based calculation theory for bridge overturning resistance was proposed, design criteria for girder bridges of "strong overturning resistance and weak bending" were established, the overturning stability safety factor when structural strength matches overturning resistance bearing capacity was derived, and it was applied to ramp single-column pier bridges such as the Nantang Interchange, avoiding obvious overturning resistance shortcomings or excessive overturning resistance design in bridge design and achieving the optimal solution for both engineering safety and economy.

BIM technology was applied to the full life-cycle construction of extra-large bridges, realizing multi-dimensional management information collaboration and multi-scenario, high-demand application of the "BIM+" series of functions, promoting the in-depth popularization and promotion of the "smart construction site" concept, and leading the application of BIM technology in bridges.