Identification and Visualization of the Full-Ring Deformation Characteristics of a Large Stormwater Sewage and Storage Tunnel Using Terrestrial Laser Scanning Technology

Zixin Zhang, Tong Yin, Xin Huang, Fan Zhang, Yeting Zhu and Wei Liu
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Zixin Zhang: Department of Geotechnical Engineering, College of Civil Engineering, Tongji University, Shanghai 200092, China
Tong Yin: Department of Geotechnical Engineering, College of Civil Engineering, Tongji University, Shanghai 200092, China
Xin Huang: Department of Geotechnical Engineering, College of Civil Engineering, Tongji University, Shanghai 200092, China
Fan Zhang: Shanghai Urban Construction Design & Research Institute, 3447 Dongfang Road, Shanghai 200125, China
Yeting Zhu: Shanghai Tunnel Engineering Co. Ltd., Shanghai 200082, China
Wei Liu: Department of Geotechnical Engineering, College of Civil Engineering, Tongji University, Shanghai 200092, China

Energies, 2019, vol. 12, issue 7, 1-17

Abstract: Constructing deeply-buried stormwater sewage and storage tunnels is an effective method to mitigate the waterlogging and sewer overflow problems in modern cities. Prior to construction of such tunnels, a structural loading test is essential for acquiring the mechanical responses under complex loading conditions, such as cyclic inner hydraulic head, during which capturing the full-ring deformation of the tunnel lining is significant for a comprehensive understanding of the tunnel’s mechanical behaviors. This paper introduces the application of terrestrial laser scanning (TLS) technology in the full-scale structural loading tests of a large stormwater sewage and storage tunnel, which gives the full-ring deformation throughout the tests. A data processing methodology was developed to extract the key data points of the lining segments from the original data cloud by removing noise points and mitigating data jump, based on which the deformation of testing the lining segments at arbitrary locations can be calculated. Furthermore, a post-processing software was developed to visualize the full-ring deformation. The full-ring deformation at different loading conditions and its evolution under cyclic loading were captured. It is shown that the lining’s convergence deformation is more sensitive to the inner hydraulic head than to the external soil-water pressure, and the deformation cannot fully recover in a water-inflow-and-drainage cycle due to the presence of joints.

Keywords: terrestrial laser scanning; full-scale loading tests; stormwater sewage; storage tunnel; data processing; deformation visualization (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
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