基于收敛-约束法的隧道支护结构安全性分析
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中图分类号：U45 文献标志码：A 文章编号：1005-8249（2026）02-0119-09
DOI：10.19860/j.cnki.issn1005-8249.2026.02.019
Safety Analysis of Tunnel Supporting Structure Based on Convergence - Confinement Method
PENG Ju1，2 ，GAO Xinqiang1，2.3， ZHAO Jingbo4，KONG Chao5，GUAN Yuezhuoer1，2， FAN Haobo²， ZHU Zhengguo²
（1. State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures ， Shijiazhuang Tiedao University， Shijiazhuang O5O043， China； 2. Schol of Civil Engineering， Shijiazhuang Tiedao Univeisity，Shijiazhuang O5O043，China；3.Hebei Key Laboratory of Mechanics Behavior Evolution
and Control of Transport Engineering Structures， Shijiazhuang O50043，China；4. China Railway 18th Bureau
Group Corporation Limted，Tianjin 300222，China；5.School of Civil Engineering and Architecture，Southwest University of Science and Technology， Mianyang 6210oo， China）
Abstract：For extremely high stressrailroad tunnels，two-dimensionalandthree-dimensional modelsareconstructedusing finiteelementsoftware，andtheexcavationstressreleaseissimulatedbythesofteningmodulusmethodtodeterminetheoptimal timingofsupport.Combinedwiththeconvergence-constraintmethod，therelationshipbetweenthestressreleaserateandthe distancefromtheexcavationsurfaceisestablishedtoevaluatetheoptimal timingoftheinitialsupportanditsinfluenceonthe stabilityof thesuroundingrock．Thereliabilityofthemodelisverifiedbycomparingtheestablishedempiicalformulas withthe numerical results. The results show that when the stress release rate reaches 70% under the extremely high stress condition，the lagging excavationsurfaceofO.8mis the besttimeforsupport.Thesafetyasessmentof thesupport structure shows thatthe structural safetyisguaranteedunderreasonableparameters.Thestudyprovidesabasis fortheoptimaldesignand safety evaluation of the initial tunnel support，and has engineering application value.
Key words：convergence-confinement method；stressrelief；support timing；limitdisplacement；safetyassessment numerical simulation
0 引言
在高地应力的恶劣环境下进行隧道施工，围岩的稳定性和安全性难以保证，极易出现大变形和塌方等工程问题[1]。（剩余10421字）