工程地质勘察毕业论文(国外英文资料).doc

工程地质勘察毕业论文(国外英文资料) The first chapter is the introduction of a pile, the advantages and the present situation of pipe pile as a foundation and pile foundation has gained great development has been widely used and plays a great role in a variety of building foundation from the beginning of the last century produced. From the development of foreign pipe from Australia in 1920 the invention of centrifugation, concrete products in Japan in 1925 to introduce this technique for reinforced concrete pile in 1962 development of prestressed concrete pipe pile PC pile to now has a history of eighty or ninety years the pipe has replaced the traditional solid pile towards the overall direction of development. In 1944, China began to produce concrete centrifugal RC pipe pile, which was successfully studied in the late 50s. Prestressed prestressed pipe pile adopts the post tensioning method to exert prestress on the pile body concrete. China in the past 15 years the production of prestressed concrete pipe pile in terms of product performance and yield have reached the forefront of the world showing the layout of wide product variety, complete specifications of production technology is mature and complete application of technology improvement etc.. According to data, in 2004, Fujian actual use of precast high-strength concrete pipe pile up to 25 million meters. In order to make rational use of pipe pile technology and effectively promote the use of pipe pile, it is necessary to study the pipe pile. The types of pipe pile are divided into steel pipe pile, precast concrete pipe pile and concrete filled steel pipe pile. Concrete filled steel tube pile and steel pipe pile with high strength and impact fatigue resistance, penetration ability, convenient cutover, reliable quality, convenient transportation, has the advantages of quick speed and heavy pile soil compaction effect. But the cost is about 310 times higher than the prestressed concrete pipe pile. Therefore, in general only must