[1]曹卫平,赵 呈,葛 欣,等.砂土中水平受荷斜桩性状模型试验研究[J].西安建筑科技大学学报(自然科学版),2020,52(02):168-176.[doi:10.15986/j.1006-7930.2020.02.003]
　CAO Weiping,ZHAO Cheng,GE Xin,et al.Model tests on behaviors of horizontally loaded single batter piles in sand[J].J. Xi’an Univ. of Arch. & Tech.(Natural Science Edition),2020,52(02):168-176.[doi:10.15986/j.1006-7930.2020.02.003]
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砂土中水平受荷斜桩性状模型试验研究()
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西安建筑科技大学学报（自然科学版）[ISSN:1006-7930/CN:61-1295/TU]

卷:
52
期数:
2020年02期
页码:
168-176
栏目:
出版日期:
2020-04-25

文章信息/Info

Title:
Model tests on behaviors of horizontally loaded single batter piles in sand
文章编号:
1006-7930(2020)02-0168-09
作者:
曹卫平1; 2; 赵 呈1; 葛 欣3; 赵 敏4
(1.西安建筑科技大学 土木工程学院,陕西 西安 710055; 2.陕西省岩土与地下空间工程重点实验室,陕西 西安 710055; 3.中铁二局第三工程有限公司,四川 成都 610031; 4.西安工业大学 建筑工程学院,陕西 西安 710032)
Author(s):
CAO Weiping1;  ZHAO Cheng1; GE Xin1; 2;  ZHAO Min3
(1.School of Civil Engineering, Xi’an Univ. of Arch. & Tech., Xi’an 710055, China; 2. Shaanxi Key Lab. of Geotechnical & Underground Space Engineering, Xi’an 710055, China.3.China Railway ERJU 3st Engineering Co. Ltd., Chengdu 610031, China; 4. School of Civil and Architecture Engineering, Xi’an Technological University, Xi’an 710032, China)
关键词:
斜桩;  模型试验;  桩身倾角;  长径比;  水平承载力
Keywords:
batter pile;  model test;  inclined angle;  pile length to shaft diameter ratio;  horizontal bearing capacity
分类号:
TU43
DOI:
10.15986/j.1006-7930.2020.02.003
文献标志码:
A
摘要:
为了解斜桩的水平承载变形性状及荷载传递性状,本文在砂土地基中开展了2组斜桩的水平承载模型试验,研究了桩身倾角及长径比对斜桩水平承载力的影响,分析了水平荷载作用下斜桩桩身轴力、弯矩、剪力及摩阻力的分布特征.试验结果表明:桩长相同时,正斜桩的水平承载力最大,负斜桩的水平承载力最小,直桩的水平承载力居中.水平荷载作用下,正斜桩桩身全长受拉,负斜桩桩身上部区段受压,下部区段受拉,不论正斜桩还是负斜桩,桩身轴力最大值均在桩顶下一定深度的截面.承受相同的水平荷载时,正斜桩的弯矩最小,负斜桩的弯矩最大,直桩弯矩居中,桩较长时,桩身弯矩较小.正斜桩的剪力最小,直桩居中,负斜桩最大,不论正斜桩还是负斜桩,剪力最大值均在桩顶截面,桩顶下一定深度处还存在极值剪力.正负斜桩桩身上部区段均存在负摩阻力,下部区段为正摩阻力
Abstract:
Two series of model tests were conducted to investigate the behaviors of single batter piles embedded in sand under horizontal load, the effect of inclined angle and pile length to shaft diameter ratio(L/D)on the lateral capacity, the axial force, the bending moment, the shear force and the skin friction of batter piles was analyzed. The results show that the horizontal bearing capacity of the positive inclined pile is the biggest; the negative inclined pile has the smallest capacity, while the vertical pile’s capacity falls in between the former and the latter. The horizontally loaded positive inclined piles will be tensioned over its full length, while compressed over upper segment and tensioned over lower segment for negative inclined piles. The maximum axial force, for either the positive or the negative batter piles doesn’t appear at pile head but at a position below the pile head. The bending moments induced in the vertical piles by horizontal load are bigger than that in the positive batter piles but smaller than that in the negative batter piles; and the longer the length of the pile, the smaller the bending moments. A maximum value and an extreme value of shear force will be caused on the pile head and a position below the pile head respectively for vertical piles as well as for batter piles. The shear force for the positive batter piles is the smallest while the biggest for the negative batter piles and the intermediate for the vertical ones. The horizontal load will cause negative skin friction on the upper shaft, irrespective of positive or negative battered

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备注/Memo

备注/Memo:
收稿日期:2019-05-29 修改稿日期:2020-03-25
基金项目:陕西省自然科学基础研究计划一般项目(2019JM-006)
第一作者:曹卫平(1969-),男,博士,教授,主要从事岩土工程方面教学与研究工作.E-mail:caowp@xauat.edu.cn
更新日期/Last Update: 2020-04-25