Grouting works in the diversion tunnel of the Inguri hydroelectric station

Abstract

1. The large volumes of fill-in and consolidated works in the diversion tunnel of the Inguri hydrostation were performed on schedule and with a high quality thanks to the development and introduction of organizational and technical measures, progressive technological designs, and performance of all works by industrial methods. 2. The use of highly productive equipment, provision of the works with energy resources, and high organization of labor made it possible to achieve in 1978 a record rate of grouting — 55,500 m/month. The monthly output of one drilling-grouting frame averaged 1500 m of grouting. 3. The use of a centralized system of preparing grouts and the drilling-grouting frames in combination with concrete-placing units developed by the Inguri Hydroelectric Station Construction Administration made it possible to combine general construction works on tunneling with grouting, which provided completion of the tunnel on schedule. This experience can be recommended for other installations. 4. The use of the piecework-bonus payment system and the introduction of the brigade contract method had a substantial influence on increasing labor productivity and improving the quality of the works.