<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>Responses of the segmental tunnel liner to external forces are primarily dependent on complicated interactions among construction process, soil structural interactions, segmental (longitudinal) joint characteristic etc. However, most proposed liner’s design procedures and recommendations are basically empirical and experience based, especially when the roles of tunnel joint are concerned. In the present study, a preliminary design calculation for the segmental joint with consideration of three practical conditions was proposed. The method adopts two main assumptions; the stiffness reduction factor and simplified pre-stressed concrete blocks, so that the flexural capacity of the segmental joint and its interactions to the main reinforced concrete segment body can be designated. Calculation examples are given for three most probable cases, namely, 1) the unbolted joint without joint opening, 2) the bolted joint without joint opening and 3) the unbolted segmental joint with allowing joint opening. Based on these calculations, the required compressive strength of concrete, thickness of liner, steel reinforcement, bolts and number of segments of the liner could be specified. The proposed method could well provide an engineer a tool to determine the initial joint configuration and its interaction to the overall tunnel lining.</p>
</abstract>

Responses of the segmental tunnel liner to external forces are primarily dependent on complicated interactions among construction process, soil structural interactions, segmental (longitudinal) joint characteristic etc. However, most proposed liner’s design procedures and recommendations are basically empirical and experience based, especially when the roles of tunnel joint are concerned. In the present study, a preliminary design calculation for the segmental joint with consideration of three practical conditions was proposed. The method adopts two main assumptions; the stiffness reduction factor and simplified pre-stressed concrete blocks, so that the flexural capacity of the segmental joint and its interactions to the main reinforced concrete segment body can be designated. Calculation examples are given for three most probable cases, namely, 1) the unbolted joint without joint opening, 2) the bolted joint without joint opening and 3) the unbolted segmental joint with allowing joint opening. Based on these calculations, the required compressive strength of concrete, thickness of liner, steel reinforcement, bolts and number of segments of the liner could be specified. The proposed method could well provide an engineer a tool to determine the initial joint configuration and its interaction to the overall tunnel lining.

Preliminary Design for Segmental Joint of Precast Tunnel Liner

Department of Civil Engineering, Faculty of Engineering

Department of Civil Engineering, Thammasat School of Engineering

Civil and Environmental Engineering

This work is licensed under the Creative Commons Attribution 4.0 International License.

{"article-title":"Preliminary Design for Segmental Joint of Precast Tunnel Liner"}

Responses of the segmental tunnel liner to external forces are primarily dependent on complicated interactions among construction process, soil structural...

Preliminary Design for Segmental Joint of Precast Tunnel Liner

Pubblicato online: 22 giu 2021

Pagine: 89 - 95

DOI: https://doi.org/10.2478/cee-2021-0010

Parole chiave
Segmental liner, Tunnel, Segmental joint, Lining, Precast

© 2021 Sirichai Pethrung et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Preliminary Design for Segmental Joint of Precast Tunnel Liner

Pubblicato online: 22 giu 2021

Pagine: 89 - 95

DOI: https://doi.org/10.2478/cee-2021-0010

Parole chiaveSegmental liner, Tunnel, Segmental joint, Lining, Precast

© 2021 Sirichai Pethrung et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Parole chiave
Segmental liner, Tunnel, Segmental joint, Lining, Precast