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Abstract Research purples: In permafrost region along Qinghai-Tibet railway, the natural environment is extreme,and the engineering geology condition is complex, and the ecological environment is vulnerable. It is more difficult toinvestigate in this region than anyplace else. The engineering geology investigation in permafrost region is a scientific research and exploratory investigation. It is important to research and sum up about technology of engineering geology investigation.
Research conclusions: To engineering geology investigation, we consider not only the special engineering geology condition, but also environmental protection and natural environment influence, especially, the extreme climate influence. These were very striated with the engineering geology investigation about permafrost along Qinghai-Tibet railway. Through summing up engineering geology investigation, a complete set of investigation technology was formed, which was reliable to construction, and suited the Qinghai-Tibet railway. Including; constituted the criterion, organization mode，management, means and measures, supervisal, environment protection, and so on. To research and sum up about technology of engineering geology investigation, which can be referenced to the Qinghai-Tibet altiplano and other regions.
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2008, Vol. 25 
