مقایسه روش‌ها و متغیرهای مؤثر در آب ورودی به تونل‌های سازندهای سخت، تونل انتقال آب سد کرج به تهران

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دکترا، دانشکده علوم زمین، دانشگاه خوارزمی، تهران، ایران

2 دانشیار، دانشکده علوم زمین، دانشگاه خوارزمی، تهران، ایران

3 استاد، دانشکده علوم زمین، دانشگاه شهید بهشتی، تهران، ایران

4 استادیار، دانشکده زمین‎شناسی، پردیس علوم، دانشگاه تهران، تهران، ایران

چکیده

بخش اول تونل انتقال آب کرج به طول 16 کیلومتر برای انتقال آب از سد امیرکبیر به تصفیه‌خانه تهران در سازند کرج حفاری شد. برای برآورد میزان نفوذ آب به درون تونل­ها، روش­ها و روابط متفاوتی وجود دارد. ورود آب به تونل توسط روش‌های تحلیلی و تجربی برآورد شد و اندازه‌گیری روزانه آب واقعی ورودی به تونل اختلافاتی را با این روش‌ها نشان داد. در این پژوهش، بر پایه مقایسه میان ارقام واقعی و پیش‌بینی‌های صورت گرفته، روابطی برای شرایط مشابه آب‌زمین‌شناختی ارایه شد. روش‌های تحلیلی، ارقام بالاتری را نسبت به پیش‌بینی‌ها نشان دادند که بر پایه این مطالعات، افزون بر نفوذپذیری و بار آبی که در این روش‌ها وجود دارد؛ ساختارهای زمین‌شناسی، بارش و شیب لایه‌ها در ورود آب زیرزمینی به تونل مؤثرند. بیشترین حجم ورود آب به تونل کرج در ساختارهای زمین‌شناسی همچون چین‌ها، گسل‌ها، دایک‌ها و درزه‌های باز صورت گرفته که در بیشتر مواقع نیز انطباق زمانی قابل‌ توجهی با بارندگی‌ها داشته است.

کلیدواژه‌ها


عنوان مقاله [English]

The comparison of effective variables and methods in water inflow into hard rock tunnels (Case study: Karaj dam-Tehran water conveyance tunnel)

نویسندگان [English]

  • M. Morsali 1
  • M. Nakhaie 2
  • M. Rezaie 2
  • H. R. Naseri 3
  • J. Hassanpour 4
1 Ph.D., Faculty of Earth Science, Kharazmi University, Tehran, Iran
2 Associate Professor, Faculty of Earth Science, Kharazmi University, Tehran, Iran
3 Professor, Faculty of Earth Science, Shahid Beheshti University, Tehran, Iran
4 Assistant Professor, Faculty of Geology, College of Science, Tehran University, Tehran, Iran
چکیده [English]

Tehran- Karaj water conveyance tunnel (part 1), 16 kilometers in length, in the Karaj formation was excavated in order to convey the water from the Amir-Kabir dam to the Tehran refinery plant. The hydrogeology studies of the Karaj tunnel were done to discover the affecting parameters on the groundwater inflow into the tunnel. Groundwater inflow was estimated by means of empirical and analytical methods. Daily measurements of inflow rate show that there are some differences between the calculated and the observed inflow value. In this research, based on the comparison between the observed and calculated groundwater inflow, some relations have been derived for similar hydrogeological conditions. In many hydrogeological conditions, the analytical equations are supervised on empirical formula. According to this research, addition to permeability and water head; geological structure, Precipitation and bedding dip have a significant effect in water inflow into tunnels. Also, most of groundwater inflow along the Karaj tunnel is largely related to the main geological features, such as folds, faults, dykes and open fractures and inflow is correlated with precipitation.

کلیدواژه‌ها [English]

  • Groundwater inflow
  • Empirical and analytical methods
  • Hydrogeological parameters
  • Geological structures
  • Tunnel
  • Iran

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