Back-analysis of sprayed concrete lined (SCL) tunnel junctions at Liverpool Street Crossrail station
المؤلف | Thomas, Alun |
المؤلف | de Battista, Nicholas |
المؤلف | Elshafie, M. |
المؤلف | Viggiani, G. |
تاريخ الإتاحة | 2024-08-05T07:19:20Z |
تاريخ النشر | 2023 |
اسم المنشور | Tunnelling and Underground Space Technology |
المصدر | Scopus |
الرقم المعياري الدولي للكتاب | 8867798 |
الملخص | Sprayed concrete linings (SCL) offer a versatile method of tunnel construction, particularly in regard to forming junctions since the lining acts as a shell structure which can redistribute the stresses around the opening efficiently. This process is easy to understand conceptually but it is much more difficult to illustrate in calculations. Conventional calculation methods make a number of far-reaching simplifications such as the assumption of linear elastic behaviour in the lining. This often leads to overly conservative designs and a residual concern over the loads in the lining. This study compares detailed measurements of strains recorded by distributed fibre optic sensors at a pair of junctions on the Crossrail project in London with a sophisticated numerical model of these tunnels. Having demonstrated that the results of the numerical model are broadly consistent with this unique set of field data, a variety of influences on the model have been examined. This includes the excavation sequence, the constitutive model for the lining and adjacent structures. The results indicate significant scope for the improvement of SCL junction design. Future papers will present the more results from other parts of this study along with their implications for the design of tunnel junctions. |
راعي المشروع | This research was performed at the Centre for Smart Infrastructure and Construction (CSIC) at Cambridge University with funding from the UK Engineering and Physical Sciences Research Council (EPSRC) and Innovate UK, under EPSRC grant nos. EP/N021614/1 and EP/I019308/1. Crossrail Ltd. has supported this project at all stages from the installation of the instrumentation through to this latest phase of research. The authors would like to acknowledge the support of the lead designer, Mott MacDonald, and main contractor, BBMV, a joint venture between Balfour Beatty, Beton- und Monierbau (BeMo), Morgan Sindall and Vinci Construction. |
اللغة | en |
الناشر | Elsevier |
الموضوع | Fibre optic monitoring Junctions Numerical modelling Sprayed concrete lined tunnels |
النوع | Article |
رقم المجلد | 141 |
تحقق من خيارات الوصول
الملفات في هذه التسجيلة
هذه التسجيلة تظهر في المجموعات التالية
-
الهندسة المدنية والمعمارية [778 items ]