丹江口大坝加高工程关键技术研究综述

丹江口大坝水利枢纽作为南水北调中线工程的水源工程,其大坝加高工程技术难度在国内外均属少见,无成熟可供借鉴的经验。大坝加高中的关键技术研究难题主要有：新老混凝土结合问题研究、大坝抗震安全问题研究、高水头大坝帷幕耐久性及补强灌浆技术研究三大类。针对关键技术研究难题,在总结前期设计研究成果的基础上,采用理论分析、数值模拟、室内实验和现场试验、原形观测相结合方法,提出具体的对策。

Research Summary of the Key Technologies in the Heightening Project of Danjiangkou Dam

Danjiangkou hydro-junction is the water source project in the Middle Route of the South-to-North Water Transfer Project. The key technologies in the heightening project are difficult and rare, and there is not mature experience for reference. There are mainly three key technical problems in the heightening project, which are opening of joint face between old and new concrete, seismic safety of the dam, and the curtain durability and reinforced grouting technology of the dam with high water head. For the difficult key technical problems, based on the research results of the primary design, the material countermeasures are presented by combining theoretical analysis, numerical simulation, laboratory experiment and field test, and prototype observation.