For difference of elevation of mountain slope, four legs of iron tower are not in the same plane. In order to reduce the excavation of the base surface and damage to the environment, several foundation types are widely used to adapt with the terrain changes, such as comprehensive unequal legs, unequal Foundation, outfitting extra legs and so on. When the tower is located in steep slope of rocky area, common foundation types in use will bring a large area of earth and rock excavation, construction difficulties, high-risk, poor basic indicators, greater damage to the environment. Consideratiing engineering practice, a new foundation type is proposed in this paper supplemented by theoretical analysis and economic analysis, which takes full advantage of the terrain and rock properties and provides a new choice for foundation design on steep slope in mountains areas.
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