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A Survey of the Application of Large-diameter SDA Bolt in slope Protection Engineering

The construction site of Nanning – Baihai Pipeline Project is the slopes, which is erosive monadnock and undulating terrain, and the elevation of proposed site is 107.5 ~ 108.1m, mainly excavation slope. The main part of the project is located in the west and south , whose west side of the hillside slope is 24.2m, the southwest is 26m and the south is19.4m. According to design drawings, the mountain must be dredged one-third to get open space, 130 meters long, 100 meters wide, for construction. Therefore, it has a rather big earth work and high construction difficulty to undertake SDA Bolt hole construction.

Since the more complicated geological conditions in Nanning station, it is difficult to drill by ordinary bolt. Therefore, the use of SDA bolt can effectively solve the difficult puzzles of drilling in loose rock, having high efficiency, quality and security in construction. Especially, the effect of the larger diameter SDA bolt is more significant. It is easy operation,high reliability and can be used as micropiles, which is very suitable for loose rock in slope support.

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