Lining performance optimization of sub-rectangular tunnels using the Hyperstatic Reaction Method. (January 2020)

• Record Type: Journal Article
• Authors: Du, Dianchun; Dias, Daniel; Do, Ngocanh
• Is Part Of: Computers and geotechnics. Volume 117(2020)
• Publication Date: 2020-01
• Subjects: Sub-rectangular -- Tunnel design -- Optimization -- Numerical method -- Hyperstatic reaction method; Engineering geology -- Data processing -- Periodicals; Soil mechanics -- Data processing -- Periodicals; Rock mechanics -- Data processing -- Periodicals; 624.1510285
• DOI: 10.1016/j.compgeo.2019.103279
• Languages: English
• ISSNs: 0266-352X

Abstract

Abstract: Sub-rectangular tunnel cross-sections are commonly used in underground engineering projects. However, very limited studies have dealt with the design of this kind of non-circular tunnels. In this paper, taking a twin-lane metro tunnel as an example, the optimization process of sub-rectangular tunnels in terms of tunnel lining forces is presented using the Hyperstatic Reaction Method (HRM). A series of mathematical functions considering the tunnel shape are used and the optimization of sub-rectangular tunnels shape is deduced. The effect of different parameters, such as the coefficient of lateral earth pressure at rest K 0, Young's modulus Es of soil, tunnel depth C, surface loads P 0 on the internal forces and shape of sub-rectangular tunnel is then investigated.