X形桩桩土相互作用对截面形状的力学响应

doi:10.16285/j.rsm.2015.S2.049

›› 2015, Vol. 36 ›› Issue (S2): 357-364.doi: 10.16285/j.rsm.2015.S2.049

X形桩桩土相互作用对截面形状的力学响应

吕亚茹^{1, 2}，丁选明³，刘汉龙^{2, 3}，刘义⁴

1. 解放军理工大学爆炸冲击防灾减灾国家重点实验室，江苏南京 210007； 2. 河海大学岩土力学与堤坝工程教育部重点实验室，江苏南京 210098； 3. 重庆大学土木工程学院, 重庆 400045；4. 工程兵学院道路桥梁系，江苏徐州 221004

收稿日期:2015-03-18 出版日期:2015-08-31 发布日期:2018-06-14
作者简介:吕亚茹，女，1987年生，博士，主要从事软土地基加固方面的科学研究。
基金资助:
国家自然科学基金（No.51408607）。

Mechanical response of pile-soil interactions of X-section cast-in-place concrete piles to cross-sectional shape

Ya-ru^{1, 2}, DING Xuan-ming³, LIU Han-long^{2, 3}, LIU Yi⁴

1. State Key Laboratory of Disaster Prevention & Mitigation of Explosion & Impact, PLA University of Science and Technology, Nanjing, Jiangsu 210007, China; 2. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University，Nanjing, Jiangsu 210098, China; 3. College of Civil Engineering, Chongqing University, Chongqing 400045, China; 4. Engineer Academy of People’s Liberation Army, Department of Road and Bridge, Xuzhou, Jiangsu 221004, China

Received:2015-03-18 Online:2015-08-31 Published:2018-06-14

摘要/Abstract

摘要： 现浇X形混凝土桩（简称XCC桩）是一种新型的异形截面桩，其桩土相互作用明显受截面形状的影响。前期已通过平衡分析法推导得到了考虑XCC桩截面形状的单桩荷载传递计算方法，但控制桩土相互作用的一个重要参数即桩土剪切作用系数对截面几何形状的力学响应尚未得到系统的研究。文中分析了桩土剪切作用系数对不同荷载形式下XCC桩3个截面控制参数（外包圆半径R、开弧间距2a、开弧角?X）的影响，并与等截面面积的圆形桩进行了对比。分析结果表明，截面参数变化时，桩土相互作用也随之变化，在截面面积、周长和桩土剪切作用的共同作用下桩身轴力随外包圆半径和开弧角度的增大而减小，随开弧间距的增大而增大，且始终小于等截面面积的圆形桩。

关键词: 现浇X形混凝土桩（XCC桩）, 截面形状, 桩土相互作用, 剪切作用系数

Abstract: The X-section cast-in-place concrete pile (XCC pile) is a new shaped pile. The pile-soil interactions are influenced by the cross-sectional geometry. The load transfer mechanism of the XCC pile dependent on the cross-sectional geometry has been derived by means of equilibrium analysis. However, the mechanical response of the vertical shearing coefficient, governing the pile-soil interactions, for the cross-sectional geometry have not been fully understood. This paper represents the effects of the three geometrical parameters (the diameter of the surrounding circle R, the distance between two adjacent cutting circulars 2a and the central angle of the cutting circle ?X) of the X-shaped cross-section on the vertical shearing coefficient. Comparative analyses between the XCC pile and circular pile of the same cross-sectional area are carried out. It is found that the pile-soil interactions vary with the changes of the geometrical parameters. Influenced by the cross-sectional area, the pile parameter and the vertical sharing coefficient, the axial force increases with the increasing of R and ?x, but decreases with the increasing of 2a. In addition, the axial force of XCC piles is always smaller than that of circular piles of the same cross-sectional area.

Key words: X-section cast-in-place concrete pile(XCC pile), cross-sectional geometry, pile-soil interaction, vertical shearing coefficient

中图分类号:

TU 473

吕亚茹，丁选明，刘汉龙，刘义，. X形桩桩土相互作用对截面形状的力学响应[J]. , 2015, 36(S2): 357-364.

Ya-ru , DING Xuan-ming , LIU Han-long , LIU Yi，. Mechanical response of pile-soil interactions of X-section cast-in-place concrete piles to cross-sectional shape [J]. , 2015, 36(S2): 357-364.

参考文献

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed

本文评价

推荐阅读 10

[1]	肖衡林，余天庆. 山区挡土墙土压力的现场试验研究[J]. , 2009, 30(12): 3771 -3775 .
[2]	江洎洧，项伟，唐辉明，曾斌，黄玲. 极限蓄水位下洞坪水库大沟湾滑坡稳定性预测[J]. , 2010, 31(3): 805 -810 .
[3]	卢正，姚海林，刘干斌，骆行文. 简谐线源荷载作用下热流固耦合地基的动力响应[J]. , 2010, 31(7): 2309 -2316 .
[4]	赵明华，孙建兵，张永杰. 基于Winkler模型的双向增强体复合地基沉降计算[J]. , 2010, 31(11): 3459 -3463 .
[5]	杨玉贵，赖远明，李双洋，董元宏. 冻结粉土三轴压缩变形破坏与能量特征分析[J]. , 2010, 31(11): 3505 -3510 .
[6]	崔皓东，张家发，张伟，王金龙. 南水北调中线典型承压水地层渠段渗流场数值分析[J]. , 2010, 31(S2): 447 -451 .
[7]	付伟，汪稔，胡明鉴，向焱红. 不同温度下冻土单轴抗压强度与电阻率关系研究[J]. , 2009, 30(1): 73 -78 .
[8]	孙富学，蔡晓鸿，朱云辉. 基于初参数法的多心圆拱隧道衬砌结构内力与变位求解[J]. , 2009, 30(4): 1127 -1130 .
[9]	李守巨，刘迎曦，于贺. 多孔材料等效导热系数与分形维数关系的数值模拟研究[J]. , 2009, 30(5): 1465 -1470 .
[10]	胡昕，洪宝宁，杜强，孟云梅. 含水率对煤系土抗剪强度的影响[J]. , 2009, 30(8): 2291 -2294 .

X形桩桩土相互作用对截面形状的力学响应

Mechanical response of pile-soil interactions of X-section cast-in-place concrete piles to cross-sectional shape

PDF (Chinese)

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 7

Metrics

本文评价

推荐阅读 10

[1]	王国辉, 陈文化, 聂庆科, 陈军红, 范晖红, 张川, . 深厚淤泥质土中基坑开挖对基桩影响的离心模型试验研究[J]. 岩土力学, 2020, 41(2): 399-407.
[2]	马显春, 罗刚, 邓建辉, 上官力, . 陡倾滑面堆积层滑坡抗滑桩锚固深度研究[J]. 岩土力学, 2018, 39(S2): 157-168.
[3]	闫澍旺，陈静，孙立强，陈浩，林澍. 抛石挤淤深度的计算方法和模型试验[J]. , 2015, 36(S1): 43-48.
[4]	王腾，李大勇，张玉哲,. 水平荷载下套管桩基的非线性响应分析[J]. , 2006, 27(S1): 836-838.
[5]	雷文杰，郑颖人，冯夏庭 . 滑坡治理中抗滑桩桩位分析[J]. , 2006, 27(6): 950-954.
[6]	王建华，冯士伦. 液化土层中桩基水平承载特性分析[J]. , 2005, 26(10): 1597-1601.
[7]	郑刚，任彦华，. 桩承载力时效对桩土相互作用及沉降的影响分析[J]. , 2003, 24(1): 65-69.