On the Qingshuitang job, client and main contractor is Gezhouba Water Resources and Hydropower Engineering Group. The company has designed the new dam around the MD 1100 and will use it to pour over 200,000 cu m of concrete – almost half the total required in the project. The crane is using a 6 m3 concrete bucket for the pouring which weighs 20t (22 US tons) when full.
Jianlin Liu, chief engineer for Gezhouba, said initial impressions of the MD 1100 were very positive.
“The Potain MD 1100 is crucial to the success of this project. It will determine whether we complete on schedule or even ahead of schedule,” he said. “It has only been at work for a few weeks so far but it has done a wonderful job. I would say it is the ideal crane for small and medium sized hydropower stations.”
The MD 1100 can lift up to 50t (55 US tons) while its maximum radius is 80m (262 ft). Maximum load at jib end is 10.6t. The MD 1100 uses 4m x 4m mast sections that are 5.7m tall. These dismantle into 2m x 2m sections for easier transport inside a 12.2m container. A compact counter jib of 24m also features.
The MD 1100 can reach free-standing heights of up to 104m (341ft) when mounted on its 10m x 10m chassis base. It works well with concrete buckets of either 3 cu m or 6 cu m volume, allowing it to pour loads of 10t or 20t respectively. The crane can lift the 20t load out to 50m, which gives it a 10m reach advantage over competitors in the same class. Hoist speeds of up to 46 m/min (150 ft/min)are achievable with these loads. Hoisting power comes from Potain’s 180 kW 250LCC winch.
The Qingshuitang hydropower station will sit on the middle reaches of the Yuan River. The project has four sections: main dam, powerhouse, ship’s lock and bank protection. The capacity of the power station will be 128 MW while the highest point of the dam will be 154.5m.
The MD 1100 can lift up to 50t (55 US tons) while its maximum radius is 80m (262 ft). Potain MD 1100 special-application tower crane
