[1]贺建清,胡成兵,张建超.基于Mindlin解的压力型锚杆锚固段的受力分析[J].水文地质工程地质,2012,39(1):47.
 HE Jian qing,HU Cheng bing,ZHANG Jian chao.Mechanical analysis of anchorage segment of pressuretype cable based on the Mindlin solution[J].Hydrogeology & Engineering Geology,2012,39(1):47.
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基于Mindlin解的压力型锚杆锚固段的受力分析()
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《水文地质工程地质》[ISSN:1000-3665/CN:11-2202/P]

卷:
39卷
期数:
2012年1期
页码:
47
栏目:
OA栏目
出版日期:
2012-01-15

文章信息/Info

Title:
Mechanical analysis of anchorage segment of pressuretype cable based on the Mindlin solution
作者:
贺建清胡成兵张建超
湖南科技大学,湖南省普通高等学校土木工程施工过程与质量安全控制重点实验室,湘潭411201
Author(s):
HE JianqingHU ChengbingZHANG Jianchao
Hunan College Key Laboratory of the Construction Process, Quality and Safety of Civil Engineering, Hunan University of Science and Technology,Xiangtan411201,China
关键词:
Mindlin解压力型锚杆锚固段力学分析影响因素
Keywords:
Mindlin’s solutionpressuretype cableanchorage segmentmechanical analysisinfluencing factors
分类号:
TU45
文献标志码:
A
摘要:
假设锚杆为与周围介质相同的材料,视锚杆作用的岩土体为弹性半空间位移体;基于Mindlin位移解,求出集中力作用下周围岩土体沿锚固体的轴向位移;根据压力型锚杆锚固段的受力状态,计算锚固体在轴向荷载作用下压缩变形,利用锚固体与周围岩土体变形协调假定,推导出锚固段轴向应力和剪应力分布的理论解。经过与已有现场试验实测数据对比分析,验证了理论解的可行性,并在此基础上讨论了相关岩土参数对锚固段轴向应力和剪应力的影响。锚杆现场试验和理论分析结果表明:压力型锚杆的锚固段所受轴向应力和剪应力与锚固力成正比;压力型锚杆的锚固段所受剪应力的分布形式受周围岩土体弹模、泊松比以及锚固体与周围岩土体界面的内摩擦角等因素的影响。其中周围岩土体的弹模影响最大。
Abstract:
Assuming that cable has the same material properties with the surrounding rock soil and there is a displacement in an elastic halfspace occurred for the rock and soil mass reinforced with cable, axial displacement of surrounding rock soil mass along cable under anchorage force was calculated based on Mindlin displacement solution. Based on the stress state of anchorage segment of pressuretype cable, the compression deformation of anchorage body under axial load was also obtained. Theoretical solutions for the distribution of axial stress and shear stress on anchorage segment of pressuretype cable were derived on the assumption of a compatible deformation between anchorage body and surrounding rock soil mass. After comparing with the existed data of insitu test, theoretical solutions proved to be feasible. On this basis, the influence of related mechanical parameters of rock and soil on shear stress and axial stress were discussed. Experimental and theoretical analysis results indicated that the axial normal stress and shear stress on anchorage segment of pressuretype cable were proportional to anchorage force, and several factors including elastic modulus, Poisson ratio of rock soil mass and internal friction between anchorage segment and rock soil mass had influence on the distribution patterns of shear stress, among which elastic modulus of rock soil mass exerted the greatest impact.

相似文献/References:

[1]吴曙光,张永兴,康明,等.压力型和拉力型锚杆工作性能对比研究[J].水文地质工程地质,2008,35(5):45.
 WU Shu-guang~,ZHANG Yong-xing~,KANG Ming~().An analysis of working performance of pressure-type and tensile-type anchor[J].Hydrogeology & Engineering Geology,2008,35(1):45.

备注/Memo

备注/Memo:
收稿日期: 20110505;修订日期: 20110923 基金项目: 国家自然科学基金资助项目(50874043); 湖南省科技计划项目(2009SK3037)作者简介: 贺建清(1964-),男,博士,教授,从事边坡工程及轻型支挡结构教学与研究工作。 Email:hjqing2000@163.com
更新日期/Last Update: 2012-01-15