https://communities.bentley.com/products/geotech-analysis/w/wiki/45476/preliminary-3d-modelling-of-structural-behaviour-of-face-bolting-and-umbrella-arch-in-tunnelingen-USTelligent Community 12https://communities.bentley.com/products/geotech-analysis/w/wiki/45476/preliminary-3d-modelling-of-structural-behaviour-of-face-bolting-and-umbrella-arch-in-tunnelingWed, 18 Dec 2019 15:05:43 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:8e3794b6-54d4-405b-aa99-71a42cf0eb7bMicha van der Sloothttps://communities.bentley.com/products/geotech-analysis/w/wiki/45476/preliminary-3d-modelling-of-structural-behaviour-of-face-bolting-and-umbrella-arch-in-tunneling#commentsCurrent Revision posted to GeoStudio | PLAXIS Wiki by Micha van der Sloot on 12/18/2019 3:05:43 PM<br /> <div class="content-scrollable-wrapper" style="overflow:auto;border-collapse:collapse;padding-bottom:30px;"> <table border="0" style="width:500px;background-color:#fffff;border:rgb(86, 170, 28) 0px solid;border-width:1px 0px 0px 0px;"> <tbody> <tr> <td style="text-align:right;border-bottom:rgb(86, 170, 28) 1px solid;padding:4px 5px 4px 50px;"><strong>Application</strong></td> <td style="text-align:left;padding:4px 5px 4px 50px;border-bottom:rgb(86, 170, 28) 1px solid;">PLAXIS 3D</td> </tr> <tr> <td style="text-align:right;border-bottom:rgb(86, 170, 28) 1px solid;padding:4px 5px 4px 50px;"><strong>Version</strong></td> <td style="text-align:left;padding:4px 5px 4px 50px;border-bottom:rgb(86, 170, 28) 1px solid;">PLAXIS 3D</td> </tr> <tr> <td style="text-align:right;border-bottom:rgb(86, 170, 28) 1px solid;padding:4px 5px 4px 50px;"><strong>Original Author</strong></td> <td style="text-align:left;padding:4px 5px 4px 50px;border-bottom:rgb(86, 170, 28) 1px solid;">A. Monnet, E. Jahangir</td> </tr> <tr> <td style="text-align:right;border-bottom:rgb(86, 170, 28) 1px solid;padding:4px 5px 4px 50px;"><strong>Date created</strong></td> <td style="text-align:left;padding:4px 5px 4px 50px;border-bottom:rgb(86, 170, 28) 1px solid;">01 October 2014</td> </tr> <tr> <td style="text-align:right;border-bottom:rgb(86, 170, 28) 1px solid;padding:4px 5px 4px 50px;"><strong>Date modified</strong></td> <td style="text-align:left;padding:4px 5px 4px 50px;border-bottom:rgb(86, 170, 28) 1px solid;">24 October 2016</td> </tr> </tbody><tbody> </tbody></table> </div> <!--–– end of Bentley header ––--> <p>Umbrella arch and face bolting are two reinforcement technics used in tunnelling (NATM conventional tunnelling), especially for low-depth tunnels (H/D=1 to 5) in poorly consolidated soils. The arch is built by setting pipes around the contour line of the tunnel face prior to excavation, while bolting consists in setting and sealing long fiberglass or metallic rods at the tunnel face. The bolts provide improved mechanical properties to the ground that is to be excavated and they are gradually destroyed as the excavation progresses, whereas the arch brings stability to the whole face area and is left as a permanent reinforcement. In this context, 3D modelling of these tunnels and their reinforcement is essential to predict surface settlements and an important tool to validate appropriate tunnel designs.</p> <div> <h4>Downloads</h4> <ul style="list-style-type:square;color:rgb(86, 170, 28);padding-bottom:5px;"> <li><a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-01-05/Iss36_5F00_Art3_5F002D005F00_Preliminary_5F00_3D_5F00_Modelling_5F00_of_5F00_Structural_5F00_behaviour_5F00_of_5F00_Face_5F00_Bolting_5F00_and_5F00_Umbrella_5F00_Arch_5F00_in_5F00_Tunneling.pdf">Iss36 Art3 - Preliminary 3D Modelling of Structural behaviour of Face Bolting and Umbrella Arch in Tunneling.pdf</a></li> </ul> </div><div style="clear:both;"></div> <div style="font-size: 90%;">Tags: PLAXIS 3D, PLAXIS Bulletin, Bulletin 36, NATM tunnel, PLAXIS, Tunnels, Tunnel, NATM</div>