清江某特大桥隧道锚承载特性数值模拟研究
Numerical Simulation on Bearing Characteristics of Tunnel-Type Anchorage of a Grand Bridge over Qingjiang River
尹红梅 1石谦 1张宜虎2
作者信息
- 1. 中交第二航务工程勘察设计院有限公司,湖北 武汉 430074
- 2. 长江科学院 水利部岩土力学与工程重点实验室,湖北 武汉 430010
- 折叠
摘要
以清江某特大桥左岸隧道锚为例,在工程地质分析的基础上建立三维地质概化模型,利用不同软件实现对复杂岩体和隧道锚结构的近似网格化离散划分.采用FLAC3D软件进行不同工况模拟,获得隧道锚的变形特征和承载能力,明确该隧道锚的潜在破坏模式为锚碇连同锚碇上部受结构面切割的岩体,在主缆拉力作用下发生沿锚碇底部岩/混凝土胶结面的整体滑移.该文采用的研究思路及相关研究成果,一方面能够为清江某特大桥隧道锚工程实践提供技术支撑,同时还有助于构建系统的隧道锚分析研究方法和评价指标体系,对后续隧道锚工程建设具有较强借鉴意义.
Abstract
This paper took the tunnel-type anchorage on the left bank of a grand bridge over the Qingjiang River as an example and established a three-dimensional geological generalization model based on the engineering geological analysis.In addition,the paper used different software to realize the approximate grid discrete division of complex rock mass and tunnel-type anchorage structure.FLAC3D software was used to simulate different working conditions,and the deformation characteristics and bearing capacity of the tunnel-type anchorage were obtained.It is found that the potential failure mode of the tunnel-type anchorage is that the anchor and the rock mass cut by the structural plane on the upper part of the anchor will slide along the rock/concrete bonding surface at the bottom of the anchor under the tension of the main cable.The adopted research ideas and relevant research results can provide technical support for the practice of tunnel-type anchorage engineering of the grand bridge over the Qingjiang River.At the same time,they help to build a systematic analysis and research method and evaluation index system of tunnel-type anchorage,which is of reference significance for the subsequent construction of tunnel-type anchorage engineering.
关键词
悬索桥隧道锚/三维数值模拟/承载性能/破坏模式/分析方法Key words
tunnel-type anchorage of suspension bridge/three-dimensional numerical simulation/bearing capacity/failure mode/analysis method引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据