اثر تونلسازی بر پاسخ تنش-تغییرشکل شمعهای مایل موجود | ||
مهندسی تونل و فضاهای زیرزمینی | ||
دوره 9، شماره 1، فروردین 1399، صفحه 33-41 اصل مقاله (1.14 M) | ||
نوع مقاله: یادداشت فنی | ||
شناسه دیجیتال (DOI): 10.22044/tuse.2019.8174.1360 | ||
نویسندگان | ||
احسان طاهرآبادی* 1؛ وحید حسینی تودشکی2؛ علی رضا اردکانی3 | ||
1,دپارتمان ژئوتکنیک, دانشکده فنی و مهندسی, دانشگاه بین المللی امام خمینی, قزوین, ایران | ||
2استادیار دانشگاه ازاد واحد زنجان | ||
3گروه مهندسی عمران، دانشکده فنی و مهندسی، دانشگاه بینالمللی امام خمینی (ره)، قزوین | ||
چکیده | ||
شمعهای مایل تا 45 درجه انحراف در برخی پروژه های عظیم مانند پلها، سکوهای نفتی، سیلوها، نیروگاه ها، پارکینگهای طبقاتی و حتی برخی ساختمانهای متحدث بر خاکهای ضعیف استفاده می شوند. با این حال اثرات تونلسازی بر مقاومت نوک شمع، کمانش و نشست سطح زمین متفاوت است. این تحقیق قصد دارد رفتار تنش-تغییرمکان سطح زمین را طی حفاری تونل در مجاورت شمعهای مایل مطالعه کند. روش المان محدود بمنظور بررسی اثر موقعیت و درجه انحراف شمعها بر جابجاییهای القایی در سطح زمین استفاده شده است. پس از صحت سنجی و ارزیابی راندمان نرم افزار المان محدود، توسعه مدل با مقایسه درجه انحراف شمعها (10، 20 و 30 درجه) و سه طول مختلف آنها (15، 21 و 27 متر) انجام شده است. نتایج نشان داد در تمام طولها و درجات انحراف شمعها، بیشینه نشست المان شمع بیشتر از بیشینه نشست سطح زمین و این بیشتر از بیشینه نشست نوک شمع است. | ||
کلیدواژهها | ||
تونلسازی؛ شمع مایل؛ 3D FEM؛ نشست؛ نیروها | ||
مراجع | ||
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