高压富水区山岭隧道渗流场影响因素敏感度分析
发布时间：2019-04-25 11:48
【摘要】：由于我国的山区面积庞大,地貌地形的条件比较复杂,那么在此复杂条件下修建山岭隧道时,往往会遇到地下水丰富地区,高压富水的问题也会相应而来。在隧道工程中,如何计算作用在衬砌结构上的水压力和隧道开挖过程中的断面涌水量,以及在水压力荷载作用下衬砌结构的安全性等等这些问题,都是隧道渗流场中相当重要的研究内容。根据资料整理,已有研究报道多针对隧道渗流场中单一因素进行独立研究,未结合多因素进行综合研究。本文通过南大梁高速华蓥山隧道工程结合等效衬砌概念,并结合正交试验对渗流场中六种影响因素进行分析,并对最显著影响因素进行了有效区间分析,所取得的主要研究成果如下:(1)通过等效衬砌原则计算衬砌外水压,与"堵水限排"结构下复合衬砌外水压进行对比,经过试算,得出了合理的等效衬砌渗透系数。(2)将等效衬砌、"堵水限排"复合衬砌和轴对称解三种计算方法下的衬砌外水压和隧道涌水量分别进行对比,事实证明"堵水限排"下衬砌外水压和隧道涌水量可以用等效衬砌方法进行计算,且等效衬砌方法在理论上也是可行的。(3)基于轴对称理论解,分析得出隧道渗流场影响因素为:等效衬砌渗透系数(隧道排水能力)、等效衬砌厚度、初期支护渗透系数、初期支护厚度、注浆圈渗透系数、注浆圈厚度。采用正交试验结合等效衬砌方法进行影响敏感度研究发现:等效衬砌渗透系数(隧道排水能力)为影响隧道渗流场最显著的因素。(4)隧道渗流场中,等效衬砌水压和隧道渗流量并不是一直随等效衬砌渗透系数的变化而发生线性变化,而是存在一定的有效影响区间。研究分析可知,南大梁高速华蓥山隧道的等效衬砌渗透系数有效影响区间为1.04× 10-7cm/s～2.04×1-6cm/s。
[Abstract]:Because the mountainous area of our country is huge and the conditions of landform and topography are quite complex, when constructing the mountain tunnel under this complex condition, we often encounter the area rich in groundwater and the problem of high pressure and rich in water. In the tunnel engineering, how to calculate the water pressure acting on the lining structure and the cross-section water inflow during tunnel excavation, as well as the safety of the lining structure under the action of water pressure, and so on. All of them are very important research contents in tunnel seepage field. According to the data collation, most of the previous studies have carried out independent research on the single factor in the tunnel seepage field, but have not carried on the comprehensive research with the combination of the multi-factors. Based on the concept of equivalent lining in Nandaliang high-speed Huayingshan tunnel project and orthogonal test, six factors affecting seepage field are analyzed in this paper, and the most significant influencing factors are analyzed in effective interval. The main results obtained are as follows: (1) the external water pressure of the lining is calculated by the equivalent lining principle, and compared with the external water pressure of the composite lining under the structure of "blocking water limit and discharge". The reasonable permeability coefficient of the equivalent lining is obtained. (2) the external water pressure of the lining and the water inflow of the tunnel are compared with the calculation methods of the equivalent lining, the "water blocking and drainage" composite lining and the axisymmetric solution, respectively. It is proved that the external water pressure and tunnel water inflow can be calculated by the equivalent lining method, and the equivalent lining method is feasible in theory. (3) based on the axisymmetric theoretical solution, the water pressure and the tunnel water inflow can be calculated by the equivalent lining method. (3) based on the axisymmetric theoretical solution, The influence factors of tunnel seepage field are as follows: equivalent lining permeability coefficient (tunnel drainage capacity), equivalent lining thickness, initial support permeability coefficient, initial support thickness, grouting ring permeability coefficient, grouting ring thickness. Orthogonal test combined with equivalent lining method is used to study the influence sensitivity. It is found that the permeability coefficient of the equivalent lining (tunnel drainage capacity) is the most significant factor affecting the tunnel seepage field. (4) in the tunnel seepage field, the permeability coefficient of the equivalent lining is the most significant factor. The water pressure of the equivalent lining and the seepage rate of the tunnel do not change linearly with the change of the permeability coefficient of the equivalent lining, but there is a certain effective influence interval. The results show that the effective influence range of equivalent lining permeability coefficient of Nandaliang high-speed Huayingshan tunnel is 1.04 脳 10 ~ 7 cm ~ 2.04 脳 1-6 cm ~ (- 2. 04 脳 1 ~ (- 6) cm 路cm ~ (- 1).
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U452.1
本文编号：2465060
[Abstract]:Because the mountainous area of our country is huge and the conditions of landform and topography are quite complex, when constructing the mountain tunnel under this complex condition, we often encounter the area rich in groundwater and the problem of high pressure and rich in water. In the tunnel engineering, how to calculate the water pressure acting on the lining structure and the cross-section water inflow during tunnel excavation, as well as the safety of the lining structure under the action of water pressure, and so on. All of them are very important research contents in tunnel seepage field. According to the data collation, most of the previous studies have carried out independent research on the single factor in the tunnel seepage field, but have not carried on the comprehensive research with the combination of the multi-factors. Based on the concept of equivalent lining in Nandaliang high-speed Huayingshan tunnel project and orthogonal test, six factors affecting seepage field are analyzed in this paper, and the most significant influencing factors are analyzed in effective interval. The main results obtained are as follows: (1) the external water pressure of the lining is calculated by the equivalent lining principle, and compared with the external water pressure of the composite lining under the structure of "blocking water limit and discharge". The reasonable permeability coefficient of the equivalent lining is obtained. (2) the external water pressure of the lining and the water inflow of the tunnel are compared with the calculation methods of the equivalent lining, the "water blocking and drainage" composite lining and the axisymmetric solution, respectively. It is proved that the external water pressure and tunnel water inflow can be calculated by the equivalent lining method, and the equivalent lining method is feasible in theory. (3) based on the axisymmetric theoretical solution, the water pressure and the tunnel water inflow can be calculated by the equivalent lining method. (3) based on the axisymmetric theoretical solution, The influence factors of tunnel seepage field are as follows: equivalent lining permeability coefficient (tunnel drainage capacity), equivalent lining thickness, initial support permeability coefficient, initial support thickness, grouting ring permeability coefficient, grouting ring thickness. Orthogonal test combined with equivalent lining method is used to study the influence sensitivity. It is found that the permeability coefficient of the equivalent lining (tunnel drainage capacity) is the most significant factor affecting the tunnel seepage field. (4) in the tunnel seepage field, the permeability coefficient of the equivalent lining is the most significant factor. The water pressure of the equivalent lining and the seepage rate of the tunnel do not change linearly with the change of the permeability coefficient of the equivalent lining, but there is a certain effective influence interval. The results show that the effective influence range of equivalent lining permeability coefficient of Nandaliang high-speed Huayingshan tunnel is 1.04 脳 10 ~ 7 cm ~ 2.04 脳 1-6 cm ~ (- 2. 04 脳 1 ~ (- 6) cm 路cm ~ (- 1).
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U452.1
【参考文献】
相关期刊论文 前10条
1 侯旭丰;高波;申玉生;陈熹;李亮;;基于正交试验浅埋暗挖洞桩法车站边桩的影响因素分析[J];铁道科学与工程学报;2016年12期
2 王志杰;何晟亚;王国栋;王宁;何明磊;;轴对称解析解对马蹄形隧道衬砌水压力及渗透量适用性研究[J];武汉大学学报(工学版);2016年01期
3 程庭;;隧道涌水量计算的尴尬困境和研究现状[J];西部探矿工程;2013年10期
4 薛佳;;隧道衬砌外水压力的理论与数值研究分析[J];石家庄铁道大学学报(自然科学版);2013年S2期
5 刘学增;张鹏;周敏;;纵向裂缝对隧道衬砌承载力的影响分析[J];岩石力学与工程学报;2012年10期
6 郑波;王建宇;吴剑;;轴对称解对隧道衬砌水压力计算的适用性研究[J];现代隧道技术;2012年01期
7 郑波;王建宇;吴剑;;基于等效渗透系数计算衬砌水压力方法研究[J];现代隧道技术;2011年06期
8 宋战平;荆敏;韩日美;吴焕通;;基于强度安全系数概念的隧道衬砌结构优选设计[J];西安建筑科技大学学报(自然科学版);2010年04期
9 王建宇;;隧道围岩渗流和衬砌水压力荷载[J];铁道建筑技术;2008年02期
10 宋玉香;景诗庭;朱永全;;隧道结构系统可靠度研究[J];岩土力学;2008年03期
，本文编号：2465060
本文链接：https://www.wllwen.com/kejilunwen/daoluqiaoliang/2465060.html
