【摘要】 双排桩支护结构作为一种新的结构形式,有效地克服了单排桩支护结构的缺点,并在投资费用上与单排桩支护结构相差无几,还无需内撑,为施工增加了工作面,具有较高的应用价值,但目前对双排桩支护结构的受力和变形研究还许多问题有待进一步完善。结合大型双排钢板桩围堰工程和现场实测数据,对双排钢板桩围堰结构的受力性能开展了些探讨性的研究工作,综述了双排桩的优缺点和几种计算方法,并采用简化后的土压力用有限元法进行了计算分析,结果表明:简化后模型计算的钢板桩内力和位移均比实测的大,说明简化模型是安全的。由于目前对双排钢板桩的受力特点和设计计算方法对双排桩相互作用和空间效应考虑较少,因此双排桩支护结构的变形计算模式还有待进一步研究和探讨。该分析方法和设计方案可为今后类似工程提供有益的借鉴。更多还原

【Abstract】 As a new structural form,the double-row pile supporting structure has effectively overcome the shortcomings of single-row pile supporting structure without adding much investment expense.Moreover,the structure has also increased the application value by enlarging the working surface.However,there are many issues about the stressing and deformation of double-row pile supporting structure too need further studies.Researches on the double-row steel plate pile cofferdam structure are carried out based on the large-scale double-row steel plate pile cofferdam structure projects and the actual field data measured from these projects.The advantages,disadvantages and several calculation methods for the double-row piles are comprehensively discussed.Meanwhile,they are calculated and analyzed by means of the simplified earth pressure of the finite element method.Based on the analysis,it is concluded that the stress and displacement of the simplified model are both larger than the actual measurement data,which has proved the safety of the simplified model.Currently,the researches on the interaction and spatial effect of double-row piles from the stress characteristics and calculation pattern of double-row steel plate piles are still very limited.Therefore,it is necessary to perform further studies deformation patterns of the double-row pile supporting structure.This study may provide some beneficial reference for similar projects in the future.更多还原