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一、绪言根据日本最新的水库建设规划,到1990年日本将建成综合利用水库350多个,以确保总蓄水量达260亿米~3。在这种形势下,日本的大坝建设事业飞速发展。同时,大坝施工用起重机的需要量也日益增加。以前适宜建坝的地质、地形均好的地方很多,可以选取施工方便、经济性好的坝址。但现在适宜建坝的坝址大致都已开发,必须在那些曾被认为暂不宜建的地方建坝。因此,对大坝施
I. INTRODUCTION According to the latest plan of reservoir construction in Japan, over 350 comprehensive utilization reservoirs will be built up by 1990 in Japan to ensure a total water storage capacity of 26.0 billion meters3. In this situation, the dam construction in Japan is developing rapidly. Meanwhile, the demand for dam construction cranes is also increasing. Formerly suitable for construction of the dam geological, terrain are good places, you can choose the construction of convenient, economical dam site. However, dam sites suitable for dam construction have generally been developed and dam construction must be carried out in places that have been considered temporarily unfit for construction. Therefore, the dam facilities