学术论文

      输电线路微型桩基下压承载力特性的模型试验

      Model test on compression bearing capacity behavior of micropile foundation for transmission line

      摘要:
      小型钻孔灌注的微型桩是输电线路的一种新型环保基础形式,具有布置灵活且节约材料等优点。本文设计并制作2个微型单桩、1个群桩基础的室内试验模型,开展桩基下压承载力特性的试验研究,考察单桩及群桩基础的荷载变形特性,探讨微型桩基础的承载力计算理论,并与试验结果进行对比。研究结果表明:微型单桩承载力计算值与试验值相差较大,群桩基础抗压承载力的理论计算值与试验值吻合较好,说明群桩中的承台及群桩效应对提升桩基承载力有贡献。
      Abstract:
      Small?sized bored grouting micropile is a new type of pro?environment foundation for transmission line. The test models of two single micropiles, and one micropile groups were signed and prepared,and the tests on compression bearing capacity behavior of micropile were carried out, and its load?deformation behaviors of single micropile and micropile groups were investigated. Besides, the calculation theory of micropile foundation was discussed,and the calculation values of bearing capacities were compared with these of tests. It could be concluded that,the bearing capacities of single micropiles was a relatively bigger than that of test, and the bearing capacity of micropiles groups had a good agreement with that of test.Based on the above analyses,the cap and pile group effect of micropile groups foundation could increase the bearing capacity.
      作者: 董梅 [1] 张大长 [2] 朱振海 [1] 张真卿 [1] 吴昊 [1]
      Author: DONG Mei [1] ZHANG Dachang [2] ZHU Zhenhai [1] ZHANG Zhenqing [1] WU Hao [1]
      作者单位: 连云港智源电力设计有限公司,江苏 连云港,222000 南京工业大学 土木工程学院,江苏 南京,211800
      年,卷(期): 2017, 39(1)
      分类号: TU473.1
      在线出版日期: 2017年3月7日
      基金项目: 2014年度江苏省电力公司科研项目;江苏省科技厅前瞻性联合研究