Analysis of mechanical characteristic and optimization of initial tensile tonnage of prestressed anchor cable

DENG Jian; XIAO Ming; XIE Bing-bing

doi:10.16285/j.rsm.2016.08.031

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Analysis of mechanical characteristic and optimization of initial tensile tonnage of prestressed anchor cable

更新时间：2026-06-25

- Analysis of mechanical characteristic and optimization of initial tensile tonnage of prestressed anchor cable
- Vol. 37, Issue 8, Pages: 2359-2365(2016)
- 作者机构：
  
  1. 武汉大学水资源与水电工程科学国家重点实验室,湖北,武汉,430072
  2. 武汉大学水工岩石力学教育部重点实验室,湖北,武汉,430072
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2016.08.031
  CLC： TU457
- Online First：09 June 2018，
  
  Published：2016
- 稿件说明：
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DENG Jian, XIAO Ming, XIE Bing-bing. Analysis of mechanical characteristic and optimization of initial tensile tonnage of prestressed anchor cable[J]. 2016, 37(8): 2359-2365.
DOI：

DENG Jian, XIAO Ming, XIE Bing-bing. Analysis of mechanical characteristic and optimization of initial tensile tonnage of prestressed anchor cable[J]. 2016, 37(8): 2359-2365. DOI： 10.16285/j.rsm.2016.08.031.

摘要

基于预应力锚索作用和锚固界面力学传递机制，建立了锚固界面应力计算模型，并提出了一种可以考虑锚固界面剪切滑移的锚索应力计算方法；基于锚索预应力损失机制，对造成预应力损失的各种因素进行了分析，并给出了各种因素影响下的预应力损失计算方法；基于锚索应力求解的基本理论，同时考虑整个施工过程中的预应力损失量，将洞室群开挖过程中锚索应力的变化量作为锚索初始张拉的安全余量，提出了一种预应力锚索初始张拉吨位计算方法。并据此编制有限元计算程序，以某水电站地下厂房洞室群为工程实例，验证了该方法的合理性。

Abstract

Based on the role of prestressed anchor and the mechanical transmission mechanism of anchorage interface

an anchorage interface stress model is developed. Then an analytical method is proposed to calculate the anchorage stress by considering the shear slip of anchorage interface. On the basis of the prestress loss mechanism

various factors causing prestress loss are analyzed

and then a method for calculating prestress loss is developed under the influence of various factors. According to fundamental theory of the solution of stress distribution

a method is presented to estimate the initial tensile tonnage of the anchor cable. During the excavation of underground caverns

the stress increment is considered as safety margin of initial tension of the anchor cable

and the prestress loss can also be taken into account. From the above

a finite element calculation program is compiled

and a case study of an underground caverns shows that the proposed method is reasonable.

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