From August 20 to 22, the China Association of Construction Enterprise Management held the "32nd Geotechnical Engineering Technology Innovation Exchange Conference" and announced the list of 2025 geotechnical engineering technology innovation application achievements. The project "Research and Application of Construction Technology for Large-Diameter Deep Vertical Shafts under Complex Geological Conditions," submitted by Construction Section 1 of the Hanjiang-Rongjiang-Lianjiang River System Connectivity Follow-up Optimization Project, won the Special Prize.

During the conference, more than 400 experts, scholars, and representatives from industry associations and the engineering construction sector gathered to discuss and exchange technological innovation achievements, and the project was invited to give a presentation and share its experience. The achievement addresses the challenges of water and sand inflow and green rapid construction in deep and large vertical shafts in water-rich complex strata near rivers. Through five key technologies—the construction of a three-dimensional coupled seepage-prevention system, precise control of rock-layer trenching, electrically driven integral-lifting formwork, interlayer slope construction of the inner lining wall using the top-down method for deep foundation pits, and three-dimensional dewatering for rapid base sealing—it systematically solved leakage in water-rich strata and reduced the risk of pollution to surrounding fish ponds and rivers from foundation pit construction,furtherimproving the technical system for constructing deep and large vertical shafts in water-rich complex strata, achieving safety and controllability throughout the entire life cycle of the engineering structure, and effectively safeguarding regional water supply security.

At present,this technology, as appraised by experts from the Guangdong Provincial Water Conservancy Association, has reached the domestic leading level overall in the field of deep and large foundation pit technology in the water conservancy industry,with significant economic and social benefits.It has been promoted and applied in three similar projects in the eastern Guangdong region, and is expected to shorten the construction period by 20%. The achievement has won the First Prize of the Henan Provincial Construction Engineering Construction Technology Innovation Achievement Award,three national patents,six provincial and ministerial-level construction methods, nine provincial and ministerial-level QC achievements, one paper in a provincial and ministerial-level journal, andthe Guangdong Provincial Science and Technology Progress Award.

The project department will continue to explore a new model of "industry-university-research cooperation + transformation of technological achievements + quality standardization construction," actively promote the implementation of achievements in shield tunneling beneath complex boulder groups, and carry out precise design and scheme optimization work targeting technical challenges such as the transportation, docking and positioning, and weld seam welding of large-diameter steel pipe-lined tunnels, presenting outstanding results as a tribute to the company's 70th anniversary.