ELASTIC SOLUTIONS OF PRESSURE TUNNEL WITH DIFFERENT MODULI IN TENSION AND COMPRESSION<sup>1)</sup>

ZHAO Zenghui; HONG Juanxia; LIU Hao; LI Canlin

doi:10.6052/1000-0879-21-274

MECHANICS IN ENGINEERING > 2022 > 44(1): 116-122. > DOI: 10.6052/1000-0879-21-274 CSTR: 32047.14.1000-0879-21-274

ZHAO Zenghui, HONG Juanxia, LIU Hao, LI Canlin. ELASTIC SOLUTIONS OF PRESSURE TUNNEL WITH DIFFERENT MODULI IN TENSION AND COMPRESSION¹⁾[J]. MECHANICS IN ENGINEERING, 2022, 44(1): 116-122. DOI: 10.6052/1000-0879-21-274

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ELASTIC SOLUTIONS OF PRESSURE TUNNEL WITH DIFFERENT MODULI IN TENSION AND COMPRESSION¹⁾

ZHAO Zenghui^*,†,2), ,,
HONG Juanxia^*,
LIU Hao^*,
LI Canlin^*

^*College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, Shandong, China
^†National Demonstration Center for Experimental Mining Engineering Education (Shandong University of Science and Technology), Qingdao 266590, Shandong, China

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Corresponding author:
ZHAO Zenghui
Received Date: July 06, 2021
Revised Date: August 18, 2021
Published Date: February 07, 2022

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Abstract

Abstract

The elastic constants of rock in compression and tension are different. Considering the difference of modulus including lining and surrounding rock, new solutions of stress and displacement of pressure tunnel were derived based on the bi-modulus theory, and a new expression of elastic resistance was obtained. Based on the theoretical solution, the influence of modulus difference on the mechanical behavior of pressure tunnel was analyzed in detail. The results show that the new solution can be degenerated into the classical solution. The radial stress from the new solution is always larger than that form the classical solution, while the tangential stress from the new solution is smaller than that from the classical solution. The tunnel displacement from the new solution is larger than that from the classical solution. The elastic resistance coefficient of surrounding rock changes parabolically with the increase of modulus ratio between compression and tension. The modulus difference of lining and surrounding rock affects the stress and displacement of pressure tunnel. If the classical solution is used in engineering design, it will inevitably lead to a certain error.
- pressure tunnel,
- different moduli in tension and compression,
- stress,
- displacement

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ELASTIC SOLUTIONS OF PRESSURE TUNNEL WITH DIFFERENT MODULI IN TENSION AND COMPRESSION¹⁾