基于等效面积法的隧道渗流场解析解应用
发布时间：2018-09-05 09:19
【摘要】：为研究四心圆隧道衬砌荷载和渗流量,基于等效面积法将四心圆隧道等效为圆形隧道,运用隧道渗流场解析解分别求得在不同的衬砌渗透系数、衬砌厚度和埋深情况下隧道衬砌外水头、注浆圈外水头和渗流量;并与相同工况下的数值解进行对比,分析解析解的应用效果。运用该方法分析了衬砌相对渗透系数和注浆圈相对渗透系数对隧道渗流场的影响,研究结果表明:解析解和数值解最大误差在5.2%以内,证明了解析解的适用性。当衬砌抗渗性能较好时,降低注浆圈渗透系数能够有效地分担衬砌外水荷载,有利于隧道安全。衬砌对隧道渗流量影响最为显著,实际工程施工中应在较好的注浆水平上,通过控制衬砌渗透性来有效地改善隧道渗流场。最后将提出的方法用于工程实例中,解析解的应用效果和基于解析解的渗流参数敏感性分析所得结论的可靠性得到了较好的验证。
[Abstract]:In order to study the lining load and seepage flow of a four-center circular tunnel, the four-center circular tunnel is equivalent to a circular tunnel based on the equivalent area method, and the permeability coefficients of different lining are obtained by using the analytical solution of the seepage field of the tunnel. Under the condition of lining thickness and buried depth, the tunnel lining outside water head, grouting ring water head and seepage flow are compared with the numerical solution under the same working condition, and the application effect of the solution is analyzed. The influence of relative permeability coefficient of lining and grouting ring on the seepage field of tunnel is analyzed by using this method. The results show that the maximum error between analytical solution and numerical solution is within 5.2%, which proves the applicability of the analytical solution. When the impermeability of lining is good, reducing the permeability coefficient of grouting ring can effectively share the external water load of lining, which is beneficial to tunnel safety. The lining has the most significant influence on the tunnel seepage flow. The seepage field of the tunnel should be effectively improved by controlling the lining permeability at a better grouting level in the actual engineering construction. Finally, the proposed method is applied to engineering examples. The application effect of the analytical solution and the reliability of the conclusions obtained from the sensitivity analysis of seepage parameters based on the analytical solution are well verified.
【作者单位】： 中国地质大学(武汉)工程学院;
【基金】：国家自然科学基金(41202201)资助
【分类号】：U452.11
本文编号：2223850
[Abstract]:In order to study the lining load and seepage flow of a four-center circular tunnel, the four-center circular tunnel is equivalent to a circular tunnel based on the equivalent area method, and the permeability coefficients of different lining are obtained by using the analytical solution of the seepage field of the tunnel. Under the condition of lining thickness and buried depth, the tunnel lining outside water head, grouting ring water head and seepage flow are compared with the numerical solution under the same working condition, and the application effect of the solution is analyzed. The influence of relative permeability coefficient of lining and grouting ring on the seepage field of tunnel is analyzed by using this method. The results show that the maximum error between analytical solution and numerical solution is within 5.2%, which proves the applicability of the analytical solution. When the impermeability of lining is good, reducing the permeability coefficient of grouting ring can effectively share the external water load of lining, which is beneficial to tunnel safety. The lining has the most significant influence on the tunnel seepage flow. The seepage field of the tunnel should be effectively improved by controlling the lining permeability at a better grouting level in the actual engineering construction. Finally, the proposed method is applied to engineering examples. The application effect of the analytical solution and the reliability of the conclusions obtained from the sensitivity analysis of seepage parameters based on the analytical solution are well verified.
【作者单位】： 中国地质大学(武汉)工程学院;
【基金】：国家自然科学基金(41202201)资助
【分类号】：U452.11
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