A set of serf-developed apparatus for foundation physical model were utilized to conduct model tests of the multi-element composite foundation with a steel pipe pile and several gravel piles. Some load-bearing charact...A set of serf-developed apparatus for foundation physical model were utilized to conduct model tests of the multi-element composite foundation with a steel pipe pile and several gravel piles. Some load-bearing characteristics of the multi-element Composite foundation, including the curves of foundation settlement, stresses of piles, pile-soil stress ratio, and load-sharing ratio of piles and soil, were obtained to study its working performances in silty sand soil. The experimental results revealed that the multi-element composite foundation with steel pipe pile and gravel pile contributed more than the gravel pile composite foundation in improving the bearing capacity of the silty fine sand.展开更多
开口钢管桩在沉桩过程中,桩端土一部分将进入管内形成“土塞”或“土芯”,一部分则被挤进土的四周。土芯进入管内的高度,将直接影响桩的设计。土芯闭塞的研究具有代表性的有山原法、田岛法等。对土芯高度能否做到事先预估,就宝钢地区的...开口钢管桩在沉桩过程中,桩端土一部分将进入管内形成“土塞”或“土芯”,一部分则被挤进土的四周。土芯进入管内的高度,将直接影响桩的设计。土芯闭塞的研究具有代表性的有山原法、田岛法等。对土芯高度能否做到事先预估,就宝钢地区的钢管桩土芯闭塞的实测资料经过整理分析拟合得到 D-η曲线,并与实测值及山原法作比较,得到较合理的预估值。重点讨论了在宝钢地区开口钢管桩的桩径 D 对η的影响,可推断其它桩径在这一地区的沉桩的土芯高度,土芯承担的荷载,钢管桩的应力场,位移场。亦为相似工程提供可能的参考。展开更多
基金The National Natural Science Foundation of China (No.50478090)
文摘A set of serf-developed apparatus for foundation physical model were utilized to conduct model tests of the multi-element composite foundation with a steel pipe pile and several gravel piles. Some load-bearing characteristics of the multi-element Composite foundation, including the curves of foundation settlement, stresses of piles, pile-soil stress ratio, and load-sharing ratio of piles and soil, were obtained to study its working performances in silty sand soil. The experimental results revealed that the multi-element composite foundation with steel pipe pile and gravel pile contributed more than the gravel pile composite foundation in improving the bearing capacity of the silty fine sand.
文摘开口钢管桩在沉桩过程中,桩端土一部分将进入管内形成“土塞”或“土芯”,一部分则被挤进土的四周。土芯进入管内的高度,将直接影响桩的设计。土芯闭塞的研究具有代表性的有山原法、田岛法等。对土芯高度能否做到事先预估,就宝钢地区的钢管桩土芯闭塞的实测资料经过整理分析拟合得到 D-η曲线,并与实测值及山原法作比较,得到较合理的预估值。重点讨论了在宝钢地区开口钢管桩的桩径 D 对η的影响,可推断其它桩径在这一地区的沉桩的土芯高度,土芯承担的荷载,钢管桩的应力场,位移场。亦为相似工程提供可能的参考。
