بررسی تأثیر متقابل پارامترهای مختلف بر دبی نشت عبوری از پی سد خاکی با استفاده از مدل Seep/W (مطالعة موردی: سد درودزن)

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانش آموخته کارشناسی ارشد گروه مهندسی عمران، واحد مرودشت، دانشگاه آزاد اسلامی، مرودشت، ایران

2 استادیار گروه مهندسی عمران، واحد شیراز، دانشگاه آزاد اسلامی، شیراز، ایران

چکیده

کنترل نشت از پی سد خاکی و محاسبة جریان نشت از پی به‌منظور کنترل پایداری و رفتارنگاری سد خاکی اهمیت بالایی دارد. سددرودزنازنوعخاکیسنگریزه‌ایرویرودخانةکردر شمالغربشیراز قرار دارد. در این تحقیق با استفاده از نتایج رفتارنگاری و دبی نشت، مدل عددی سد درودزن در Seep/w واسنجی و صحت‌سنجی انجام شد. تحت گزینه­های مختلف کنترل نشت از پی (شامل روش­های استفاده از پتوی رسی و پردة آب­بند) با تغییر پارامترهای مختلف (فاصله و ارتفاع پرده آب­بند و طول پتوی رسی) و پارامترهای ژئوتکنیکی، هیدرولیکی و هندسی (مانند نفوذپذیری پی، ارتفاع لایة نفوذپذیر و رقوم آب مخزن) تغییرات دبی نشت از پی مدل بررسی شد. نتایج بررسی‌ها نشان می‌دهد که کاهش بار آبی مخزن، افزایش طول پتوی رسی و استفاده از دیوار آب‌بند در میانه و ابتدای سد سبب کاهش دبی نشت از پی خواهد شد. همچنین، استفادة هم‌زمان از دیوار آب­بند (به‌خصوص در میانه و ابتدای پی سد) و پتوی رسی تأثیر بیشتری در کاهش دبی نشت از پی دارد. با استفاده از نرم­افزار SPSS رابطة رگرسیونی بر اساس مؤثرترین اعداد بی­بعد ارائه گردید. مقایسة مقادیر تخمینی دبی نشت از پی با روابط قبلی نشان می‌دهد که دقت تخمین این رابطه بسیار بیشتر از دقت تخمین سایر روش­هاست.

کلیدواژه‌ها


عنوان مقاله [English]

Investigation the Effect of Different Parameters in Earth Dam Foundation Seepage Using Seep/W Model (Case Study: Doroodzan Dam)

نویسندگان [English]

  • pegah zaboli 1
  • Mohammad Mehdi Jabbari 2
1 Department of Civil Engineering, Marvdasht Unit, Islamic Azad University
2 Department of Civil Engineering, Shiraz Unit, Islamic Azad University
چکیده [English]

Controlling seepage from earth dams foundation and calculation of its valve is so important for monitoring and stability control of earth dam. Doroodzan is an earth-rock dam which is located on North-west of Kor River. In this study simulating, calibrating and validation of numerical model of Doroodzan dam were conducted in seep/w software using result of monitoring report. Then changes of foundation seepage flow of Doroodzan calibrated earth dam model were studied changing Foundation seepage control method (consisted in using clayey blanket and cut off wall) and parameters of each method (such as blanket length and cut off height and location) and changing the geometry and hydraulic parameters (such as foundation permeability and reservoir water level). Results showed that increase in blanket length and using cut off wall at the first and middle of dam, decreases foundation seepage flow. In addition simulate using blanket and cut off wall had the most effect on decrease in foundation seepage flow. Finally a regression equation due to determine earth dam foundation seepage was developed using Spss software. Comparison of the accuracy of the proposed equation results with previously presented equations showed that estimated foundation seepage discharge using proposed equation has higher accuracy.

Finally a regression equation due to determine earth dam foundation seepage was developed using Spss software. Comparison of the accuracy of the proposed equation results with previously presented equations showed that estimated foundation seepage discharge using proposed equation has higher accuracy.

کلیدواژه‌ها [English]

  • Clayey Blanket
  • Cut Off Wall
  • Seep/W Software
  • Seepage Control
 

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