Hoover Dam, once known as Boulder Dam, is a concrete arch-gravity dam in the Black Canyon of the Colorado River, on the border between the U.S. states of Nevada and Arizona. It was constructed between 1931 and 1936 during the Great Depression. Its construction was the result of a massive effort involving thousands of workers, and cost over one hundred lives. The dam was controversially named after President Herbert Hoover.
The cleared, underlying rock foundation of the dam site was reinforced with grout, called a grout curtain. Holes were driven into the walls and base of the canyon, as deep as 150 feet (46 m) into the rock, and any cavities encountered were to be filled with grout. This was done to stabilize the rock, to prevent water from seeping past the dam through the canyon rock, and to limit “uplift”—upward pressure from water seeping under the dam.
Based on this dam construction environment needing grouting and anchoring , it can be used rock bolting to stabilize the foundation effectively, which can be applied to kinds of environment, can ensure continuously steady construction, can be high degree of mechanization, low noise and less dust, can reduce the labor intensity of workers, and can be conducive to their health and safety.