Monolithizing the joints in pipelines during construction of the Zagorsk water storage power plant

Conclusions

• 1. The stockholder firm “Gidrospetsstroi” first developed, made feasible, and completely mastered a new procedure for work involving the monolithizing of large-diameter steel-reinforced-concrete pipelines in the domestic practice of special operations. 978 butt joints between individual elements have been successfully grouted.

• 2. A procedure for monolithizing joints between reinforced-concrete elements in pipelines, which has been implemented in the construction of the Zagorsk water storage power plant, can be classified as a new technically complex form of special hydrotechnical operations. In conducting the work, it is necessary to focus attention on strict observance of the work procedure and on the possibility of bulging of the metallic lining of the conduit in the case where injection requirements are not observed. The work requires attending personnel with high qualifications, and should be accompanied by careful certification inspection to guarantee reliable quality of the work.

• 3. Operations involving the monolithizing of butt joints in the steel-reinforced-concrete pressure pipelines have important principal differences with respect to the classical grouting of joints in monolithizing concrete dams and with respect to work involving the grouting of massive reinforced-concrete blocks possessing elements of a work procedure involving filler grouting beyond the facing in individual cases.

• 4. The firm “Gidrospetsstroi,” which has significant experience in the design, technology, production, and quality control of special operations, guarantees their successful execution. The firm offers highly qualified specialists, production equipment, the timely publication of design-estimate documentation, and the realization of careful control (in the form of certification inspection) over the quality of their work.