矿山法城市隧道运营期排水量与水压力关系的一种预判方法

发布时间：2018-04-14 06:15

本文选题：城市隧道 + 排水量　；参考：《工程力学》2017年01期

【摘要】：预判隧道运营期排水量与二衬外水压力的关系是城市隧道设计中的关键问题,而高、低水位隧道的渗流场影响范围存在较大差别,理论预测隧道排水量和水压力时不能忽视其边界效应的作用。首先,利用地下水渗流理论、复变函数保角映射理论和二维稳态流动的复变函数理论,并结合围岩-支护结构精细化模型和气象因素,分别对高水位和低水位隧道运营期排水量及二衬外水压力进行分析,然后依托在建的深圳东部过境高速公路连接线工程,对不同注浆圈渗透系数和厚度条件下城市隧道排水量及水压力之间的关系进行研究,结果表明:无论低水位还是高水位城市隧道,二衬外水压力均随隧道排水量增加呈线性降低,且注浆圈渗透系数的变化相比其厚度的变化,对水压力随排水量的折减作用更加明显;注浆圈渗透系数的增减比例相同时,低水位城市隧道水压力随排水量的折减速率更快,而注浆圈厚度增减量值相同时,高、低水位隧道水压力随排水量的折减速率基本相同。
[Abstract]:It is a key problem in the design of city tunnels to predict the relationship between the displacement of water and the pressure of the second liner in the operation period of the tunnel. However, the influence range of the seepage field in the high and low water level tunnels is quite different.The effect of boundary effect can not be neglected in predicting tunnel displacement and water pressure theoretically.Firstly, the groundwater seepage theory, the conformal mapping theory of complex variable function and the complex variable function theory of two-dimensional steady state flow are used, and the fine model of surrounding rock support structure and meteorological factors are combined.The discharges of high water level and low water level tunnels and the external water pressure of the second liner are analyzed respectively, and then the connecting line project of Shenzhen East Transit Expressway, which is under construction, is relied on.The relationship between water displacement and water pressure of urban tunnel under different grouting ring permeability coefficient and thickness is studied. The results show that: no matter low water level or high water level city tunnel,The water pressure of the second liner decreases linearly with the increase of the tunnel displacement, and the change of the permeability coefficient of the grouting ring is more obvious than the change of the thickness of the grouting ring, and the effect of the water pressure on the water pressure decreases with the displacement, and when the ratio of the increase and decrease of the permeability coefficient of the grouting ring is the same,The water pressure of low water level city tunnel decreases more quickly with the displacement of water, and when the thickness of grouting ring increases or decreases, the water pressure of low water level tunnel is basically the same as the deceleration rate of displacement.
【作者单位】：西南交通大学土木工程学院;西南交通大学交通隧道工程教育部重点实验室;
【基金】：国家高技术研究发展计划(863计划)项目(2014AA110401) 国家自然科学基金—煤炭联合基金重点项目(U1361210) 国家科技支撑计划课题(子课题)项目(2013BAB10B03,2013BAB10B05)
【分类号】：U453.6

【相似文献】