Designing U-shaped tunnel linings in stratified soils using the hyperstatic reaction method. Issue 14 (5th December 2020)

• Record Type: Journal Article
• Authors: Du, Dianchun; Dias, Daniel; Do, Ngocanh
• Is Part Of: European journal of environmental and civil engineering. Volume 24:Issue 14(2020)
• Page Start: 2422
• Page End: 2439
• Publication Date: 2020-12-05
• Subjects: U-shaped tunnel linings -- multi-layered soils -- numerical method -- hyperstatic reaction method; Sustainable engineering -- Periodicals; Civil engineering -- Environmental aspects -- Periodicals; Environmental engineering -- Periodicals; 628
• DOI: 10.1080/19648189.2018.1506827
• Languages: English
• ISSNs: 1964-8189

Abstract

Abstract: Tunnels are usually constructed in stratified geotechnical environments. However, most tunnel designers prefer to use a simplified model with the assumption of homogeneous soil conditions. This paper presents a numerical method, the hyperstatic reaction method (HRM), to investigate the effect of multi-layered soils on the design U-shaped tunnel linings. The performance of the presented method was investigated by comparing its results with the ones of a finite difference program. Different stratified soil conditions are considered to investigate the U-shaped tunnel lining behaviour: one homogeneous layer, one layer with a linear cohesion with depth, two layers, and three layers considering a variation of the position and of the thickness of the intermediate layer. The results of two different U-shaped tunnels were compared and analysed for these different stratified soils. In the case of a U-shaped tunnel without invert, the effect of the lining constraint conditions is also investigated.