浅埋黄土隧道掌子面前方围岩变形规律研究
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摘要
现有地铁施工多通过注浆法加固前方土体以达到控制变形的目的,但对掌子面前方的围岩变形难以测量,注浆对前方土体的效果则更加难以预测。为此,通过室内试验模型,模拟不同注浆效果下的隧道开挖掌子面前方围岩的受力状态及变形,并结合工程实际,特别研究了浅埋黄土隧道掌子面前方围岩变形规律与影响范围。
The existing subway construction mostly uses grouting method to reinforce the front soil to achieve the purpose of controlling deformation, but the deformation of surrounding rock in front of the tunnel face is difficult to measure, and the effect of grouting on the front soil is more difficult to predict. Therefore, through laboratory test model, the stress state and deformation of surrounding rock in front of tunnel excavation face under different grouting effects are simulated. Combining with engineering practice, the deformation gauge and influence range of surrounding rock in front of shallow loess tunnel face are studied in particular.
The existing subway construction mostly uses grouting method to reinforce the front soil to achieve the purpose of controlling deformation, but the deformation of surrounding rock in front of the tunnel face is difficult to measure, and the effect of grouting on the front soil is more difficult to predict. Therefore, through laboratory test model, the stress state and deformation of surrounding rock in front of tunnel excavation face under different grouting effects are simulated. Combining with engineering practice, the deformation gauge and influence range of surrounding rock in front of shallow loess tunnel face are studied in particular.
引文
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[3]高地应力软岩隧道掌子面前方岩体变形规律研究[D].兰州:兰州交通大学,2016.
[4]张艳刚,张坤勇,史峤臻.开挖卸荷土体本构模型研究方法[J].水利与建筑工程学报,2010(4):40-43.
[5]刘小生,刘启旺,王钟宁,等.联合室内和现场试验确定土体本构模型参数方法研究[J].中国水利水电科学研究院学报, 2 0 0 6(3):220-225.
[6]李俊鹏,段小强,闫小虎.开挖过程中隧洞围岩应力释放规律的数值研究[J].水利与建筑工程学报,2007,5(4):59-62.
[7]师晓权.软弱围岩隧道掌子面稳定性控制及预加固技术研究[D].成都:西南交通大学,2012.
[8]陈喆.基于相似理论和模型试验的结构动响应分析[D].南京:南京航空航天大学,2012.
[9]李兵:岩石相似材料的试验研究[D].重庆:重庆大学,2015.
[10]郑涛.岩土工程模型试验的理论与方法[J].现代矿业,2008,24(3):18-21.
[11]朱彤.结构动力模型相似问题及结构动力试验技术研究[D].大连:大连理工大学,2004.