Boundary Element Analysis of a Lined Tunnel Problem

نویسندگان

  • Kais Shlash Building and Construction Engineering, university of Technology Iraq
  • Mohammed Fattah Building and Construction Engineering, university of Technology Iraq
چکیده مقاله:

The boundary element technique is a practical problem-solving tool and useful in comparison to other currently popular alternatives. In this paper, a circular tunnel of a diameter 3.4 m is to be excavated through a clayey soil and surrounded by concrete lining of a thickness 0.2 m, so the clear internal diameter is 3.0 m. A plane strain analysis is adopted for such problem and the soil is assumed to be homogeneous, isotropic and linearly elastic medium. The program MRBEM (multi-region BEM) is adopted to analyze a 2D circular lined tunnel in a soil medium of an infinite extent.  The existence of a lined tunnel, as in the case of any structure, through the soil medium is affected by and affects the surrounding soil. This may be understood throughout the study of many parameters that influence the tunnel's behavior. The parametric study for the lined tunnel covers the influence of the following factors: Depth of the tunnel Undrained shear strength of soil.            It was found that Ground surface settlement, due to the effect of surcharge load, shows its maximum value at both sides of the lined tunnel and not above the center of the tunnel. The maximum positive stresses at the lining interface occur at the crown and invert regions. These stresses tend to decrease gradually until they reach their minimum negative values at the springline region.

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

DUAL BOUNDARY ELEMENT ANALYSIS OF CRACKED PLATES

The dual boundary element method is formulated for the analysis of linear elastic cracked plates. The dual boundary integral equations of the method are the displacement and the traction equations. When these equations are simultaneously applied along the crack boundaries, general crack problems can be solved in a single-region formulation, with both crack boundaries discretized with discontinu...

متن کامل

A General Boundary Element Formulation for The Analysis of Viscoelastic Problems

The analysis of viscoelastic materials is one of the most important subjects in engineering structures. Several works have been so far made for the integral equation methods to viscoelastic problems. From the basic assumptions of viscoelastic constitutive equations and weighted residual techniques, a simple but effective Boundary Element (BE) formulation is developed for the Kelvin viscoelastic...

متن کامل

A boundary element/finite difference analysis of subsidence phenomenon due to underground structures

Analysis of the stresses, displacements, and horizontal strains of the ground subsidence due to underground excavation in rocks can be accomplished by means of a hybridized higher order indirect boundary element/finite difference (BE/FD) formulation. A semi-infinite displacement discontinuity field is discretized (numerically) using the cubic displacement discontinuity elements (i.e. each highe...

متن کامل

منابع من

با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ذخیره در منابع من قبلا به منابع من ذحیره شده

{@ msg_add @}


عنوان ژورنال

دوره 25  شماره 2

صفحات  89- 98

تاریخ انتشار 2012-05-01

با دنبال کردن یک ژورنال هنگامی که شماره جدید این ژورنال منتشر می شود به شما از طریق ایمیل اطلاع داده می شود.

میزبانی شده توسط پلتفرم ابری doprax.com

copyright © 2015-2023