理論研究 2025年 第卷 第18期

DOI: 10.7672 / sgjs2025180001

隧道仰拱開裂、初支變形及二襯開裂處治研究

劉博1,楊建軍1,傅鶴林2,景志泉2,彭澤同2

作者簡(jiǎn)介：

劉博，工程師，E-mail: 563423538@ qq. com

作者單位：

1.中建五局土木公司市政環(huán)保分公司，湖南長(zhǎng)沙 410004;2.中南大學(xué)土木工程學(xué)院，湖南長(zhǎng)沙 410075

基金項(xiàng)目：

?國(guó)家自然科學(xué)基金（52478424）；中建五局土木公司科技研發(fā)課題（cscec5b-TM-2023-65）；湖南省教育廳重點(diǎn)項(xiàng)目（23A0014）

摘要：

為解決公路隧道病害處治難題，以某高速公路隧道為工程實(shí)例，采用工程類比法及數(shù)值模擬方法，對(duì)隧道仰拱開裂、初支變形及二襯開裂原因進(jìn)行了分析，提出了適合的病害處治技術(shù)，并對(duì)提出的洞內(nèi)加固技術(shù)進(jìn)行了細(xì)化設(shè)計(jì)和研究。結(jié)果表明：地形偏壓造成的不均勻沉降是引起隧道初支變形、仰拱及二襯開裂的重要原因，同時(shí)巖質(zhì)軟弱、巖層富水和地質(zhì)構(gòu)造發(fā)育也是造成隧道初支變形、仰拱及二襯開裂的重要影響因素，三者耦合相互作用造成上覆圍巖進(jìn)一步劣化，加劇了襯砌結(jié)構(gòu)病害的發(fā)展程度；隧道洞內(nèi)加固方案可避免大開大挖，施工簡(jiǎn)單且造價(jià)低，通過(guò)合理的洞內(nèi)加固措施可很好地解決隧道仰拱開裂、初支變形及二襯開裂問題。采用有限元軟件建模并計(jì)算了洞內(nèi)加固方案，其計(jì)算結(jié)果驗(yàn)證了該方案的安全性和可行性。

English：

In order to solve the problem of highway tunnel disease treatment, taking a highway tunnel asan engineering example, the causes of inverted arch filling cracking, the initial support deformation andthe secondary lining cracking are analyzed by using engineering analogy method and numerical simulationmethod. The suitable disease treatment technology is proposed, and the proposed tunnel reinforcementtechnology is detailed designed and studied. The results show that: Uneven settlement caused by terrainbias is an important cause of tunnel initial support deformation, inverted arch filling and secondary liningcracking; Meanwhile, rock weakness, rock strata rich in water and geological structure development arealso important influencing factors of tunnel initial support deformation, inverted arch filling and secondarylining cracking. The coupling interaction of which causes further deterioration of overlying surroundingrock and aggravation of lining structure diseases; The tunnel reinforcement scheme can avoid largeexcavation, and the construction is simple and the cost is low, and the scheme can effectively solve theproblems of tunnel inverted arch filling cracking, initial support deformation and secondary liningcracking through reasonable reinforcement measures. The finite element software is used to model andcalculate the reinforcement scheme in the tunnel, and the calculation results verify the safety andfeasibility of the scheme.