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中南大学学报(自然科学版)

Journal of Central South University

第46卷    第6期    总第250期    2015年6月

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文章编号:1672-7207(2015)06-2244-06
高速公路改扩建工程边坡抗滑桩加固效果数值分析
罗根传1, 2,何忠明1,曾铃3

(1. 长沙理工大学 交通运输工程学院,湖南 长沙,410004;
2. 广西壮族自治区 交通投资集团有限公司,广西 南宁,530028;
3. 长沙理工大学 土木与建筑工程学院,湖南 长沙,410004
)

摘 要: 为了分析改扩建工程中使用抗滑桩对边坡加固治理时的支护稳定性,基于FLAC3D软件对某改扩建边坡利用抗滑桩加固效果进行数值模拟,得到边坡的应力应变云图、桩身前后岩体压力及桩自身内力的分布规律。研究结果表明:抗滑桩的阻挡作用使桩周岩体局部应力增加,抗滑桩处的剪应变增量增大;抗滑桩前、后的岩土压力呈三角形分布,边坡滑裂面以下岩土压力分布复杂,可近似认为属于梯形或矩形分布;抗滑桩桩体在滑裂面位置处的剪力和弯矩最大。

 

关键字: 改扩建;抗滑桩;桩岩相互作用机理;加固效果

Numerical analysis of reinforcement effect of slope anti-slide pile on expressway reconstruction projection
LUO Genchuan1, 2, HE Zhongming1, ZENG Ling3

1. School of Traffic and Transportation Engineering,
Changsha University of Science &Technology, Changsha 410004, China;
2. Communications Investment Group Co. Ltd of Guangxi Zhuang Autonomous Region, Nanning 530028, China;
3. School of Civil Engineering and Architecture, Changsha University of Science &Technology, Changsha 410004, China

Abstract:In order to analyze the stability in the expansion project when the anti-slide plie was used on slope governance, by using numerical simulation to analyze the effect of strengthening of anti-slide plie on a expansion project which was based on FLAC3D, the stress strain contours of the slope, body stress of rock before and after pile and its internal force distribution were obtained. The results show that the anti-slide pile blocking effect makes the local stress of rock mass increase, and anti-slide pile in shear strain increment also increases. Stress distribution of rock and soil is triangular before and after anti-slide pile, pressure distribution of rock and soil is complex under the critical slip surface, and can be considered to be a trapezoid or rectangular distribution. Shear force and bending moment of anti-slide pile are the maximum on the critical slip surface.

 

Key words: reconstruction; anti-slide pile; mechanism of piles of rock; reinforcement effect

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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