富水区隧道合理防排水型式及注浆加固参数研究

发布时间：2018-07-07 23:13

本文选题：隧道工程 + 流固耦合计算　；参考：《防灾减灾工程学报》2014年04期

【摘要】：以在建的某近接水库公路隧道为工程依托,建立其渗流场和应力场的双场流固耦合计算模型;选取3种不同的防排水型式为研究对象,对注浆圈厚度、注浆圈渗透系数、控制排水量等因素对隧道内排水量和衬砌外水压力的影响规律进行探究,提出了合理的注浆圈加固参数、控制性排水量以及最优的防排水方式等。研究结果表明:增大注浆圈厚度或降低注浆圈渗透系数均能实现减小衬砌外水压力的目的,但并不意味着注浆圈厚度越厚、渗透系数越低,对隧道涌水量的控制效果就越好,而是存在一个相对经济合理的注浆圈加固参数值;隧道控制排水量以及排水型式对于控制衬砌结构外水压力的大小起到决定性的作用;采用环向排水管及盲管+墙脚设泄水孔的排水型式,这对衬砌结构受力最为有利。
[Abstract]:Based on a highway tunnel near reservoir under construction, a two-field fluid-solid coupling calculation model of seepage field and stress field is established, and three different types of waterproofing and drainage are selected as the research object, and the thickness of grouting ring and the permeability coefficient of grouting ring are studied. This paper probes into the influence of the factors such as controlling the displacement of the tunnel and the external water pressure of the lining, and puts forward the reasonable reinforcement parameters of the grouting ring, the controlled displacement and the optimal waterproof and drainage method, etc. The results show that increasing the thickness of the grouting ring or reducing the permeability coefficient of the grouting ring can achieve the purpose of reducing the external water pressure of the lining, but it does not mean that the thicker the grouting ring is, the lower the permeability coefficient is, and the better the control effect on the water inflow of the tunnel is. However, there is a relatively economical and reasonable grouting ring reinforcement parameter value, the tunnel control displacement and drainage type play a decisive role in controlling the external water pressure of the lining structure. The drainage type of drainage pipe with annular drain pipe and blind pipe wall foot is the most favorable for the lining structure.
【作者单位】：西南交通大学交通隧道工程教育部重点实验室、土木工程学院;
【基金】：国家科技支撑计划课题(2012BAG05B03) 重庆市交通科学技术项目(2011-03) 四川省交通科技项目(110109066) 西南交通大学博士研究生创新基金(2013)资助
【分类号】：U453.6

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