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1概述随着开放、改革深化,大型机场、港口、高速公路、高层宾馆等大型设施在我国兴起,它们施工设计时,首先要考虑地面承载能力。为加固地基,视不同的承载要求,要对地层打入钢管桩、钢板桩,或水泥桩、碎石桩,或挤密砂桩、化学桩等等。在国外,对铁路、公路的路基,港口码头、仓库料场以及大型桥梁的引桥,乃至围海造地、海上平台作业,均采用了经济有效的挤密砂桩工艺,尤其是含水量大、士层松软的震域震带区,更需要大面积
1 Overview With the opening up and reform deepening, large-scale airports, ports, highways, high-rise hotels and other large facilities are emerging in our country. When designing their construction, we must first consider the carrying capacity of the ground. To reinforce the foundation, depending on the bearing requirements, it is necessary to penetrate the steel pipe pile, steel sheet pile, or cement pile, gravel pile, compacted sand pile, chemical pile, etc. into the formation. In foreign countries, the economical and effective process of compacted sand piles are adopted for railroads, subgrade of highways, port terminals, warehouse yard and the approach bridge of large bridges, as well as land reclamation and offshore platforms. In particular, Soft earthquake zone seismic zone, but also need a large area