摘要
文中涉及的某煤炭专用码头柔性靠船桩是一种新颖的柔性墩码头结构形式,该结构由7根大直径钢管嵌岩桩组成,桩外径为1 400 mm,壁厚16 mm,桩长30.74～32.24 m,嵌岩深度4.94～5.63 m,这在国内外尚属罕见。为论证这种结构可靠性,验证相关的设计,检验施工质量,对该码头柔性靠船结构进行了水平承载力的现场试验。现场试验表明,本工程的柔性靠船结构设计先进、施工良好、工程性能优异,其安全度达到了设计要求。考虑到水平荷载作用下桩的性状是一个复杂的桩土相互作用体系,因此,为提高理论设计水平,还利用了综合刚度原理和双参数法对2根大直径柔性钢管嵌岩桩在各级加荷下的性状进行了分析,发现计算结果与实测数据吻合,从而总结出桩-土共同作用的规律;探讨了综合刚度EI和双参数a 和1/n的数值范围,得到一些有意义的结果,希望能为同类地区的嵌岩桩的设计提供依据,也为综合刚度原理和双参数法应用于大直径钢管嵌岩桩积累了重要的桩土参数。
The flexible large-diameter rock-socketed steel pipe piles in a coal wharf is a new form of structure,which consists of 7 large-diameter rock-socketed steel pipe piles. The steel pipe pile is rare in the domestic and international engineering,with its outside diameter of 1 400 mm,thickness of 16 mm,lengths of 30.74～32.24 m,and 4.94～5.63 m socketed into rock. In order to verify the safety of structures and the quality of construction as well as to improve the design methods,a field test on two piles under lateral load is carried out. This full scale test shows that the design and the construction are excellent,and meet the demand of the original design. However,the improvement of design methods for lateral load piles is a complex problem,as it requires the determination of relevant properties of soil and soil-pile. So a new calculation method for lateral loaded pile,named composite stiffness principle with biparameter method,is presented and verified by comparing its results with available field test data. Thus the regulation of the pile-soil interaction and the range of composite stiffness EI and biparameter 1/n with a is obtained. These parameters can be used in the design of other long piles nearby. At the same time,the pile-soil parameters for the large-diameter rock-socketed steel pipe piles are accumulated for development of this new method.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2004年第10期1770-1777,共8页
Chinese Journal of Rock Mechanics and Engineering
关键词
柔性墩码头
岩土力学
钢管嵌岩桩
水平承载力
双参数法
煤码头
rock and soil mechanics,rock-socketed steel pipe piles,pile-soil interaction,composite stiffness principle,biparameter method
