3d tunnel modeling and excavation -...
TRANSCRIPT
![Page 1: 3D Tunnel Modeling and Excavation - …northamerica.midasuser.com/web/upload/sample/3d_tunnel_with_pipe... · Angel Francisco Martinez Application Engineer MIDAS NY 3D Tunnel Modeling](https://reader031.vdocuments.us/reader031/viewer/2022021818/5aae925d7f8b9a5d0a8c4da2/html5/thumbnails/1.jpg)
Angel Francisco MartinezApplication Engineer
MIDAS NY
3D Tunnel Modeling and Excavation
![Page 2: 3D Tunnel Modeling and Excavation - …northamerica.midasuser.com/web/upload/sample/3d_tunnel_with_pipe... · Angel Francisco Martinez Application Engineer MIDAS NY 3D Tunnel Modeling](https://reader031.vdocuments.us/reader031/viewer/2022021818/5aae925d7f8b9a5d0a8c4da2/html5/thumbnails/2.jpg)
01 Introduction
02 Benefits of GTS NX for Tunneling
03 Demo
Content
![Page 3: 3D Tunnel Modeling and Excavation - …northamerica.midasuser.com/web/upload/sample/3d_tunnel_with_pipe... · Angel Francisco Martinez Application Engineer MIDAS NY 3D Tunnel Modeling](https://reader031.vdocuments.us/reader031/viewer/2022021818/5aae925d7f8b9a5d0a8c4da2/html5/thumbnails/3.jpg)
Introduction
![Page 4: 3D Tunnel Modeling and Excavation - …northamerica.midasuser.com/web/upload/sample/3d_tunnel_with_pipe... · Angel Francisco Martinez Application Engineer MIDAS NY 3D Tunnel Modeling](https://reader031.vdocuments.us/reader031/viewer/2022021818/5aae925d7f8b9a5d0a8c4da2/html5/thumbnails/4.jpg)
No. 1 in software for civil engineering
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About MIDAS
![Page 5: 3D Tunnel Modeling and Excavation - …northamerica.midasuser.com/web/upload/sample/3d_tunnel_with_pipe... · Angel Francisco Martinez Application Engineer MIDAS NY 3D Tunnel Modeling](https://reader031.vdocuments.us/reader031/viewer/2022021818/5aae925d7f8b9a5d0a8c4da2/html5/thumbnails/5.jpg)
midas FX+
midas NFX
Mechanical
General Pre & Post Processor
for Finite Element Analysis
Integrated Design System
for Building and General Structures
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analysis System
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Design
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Detailing
northamerica.midasuser.com
www.midasgtsnx.com
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Benefits of GTS NX for Tunneling
![Page 8: 3D Tunnel Modeling and Excavation - …northamerica.midasuser.com/web/upload/sample/3d_tunnel_with_pipe... · Angel Francisco Martinez Application Engineer MIDAS NY 3D Tunnel Modeling](https://reader031.vdocuments.us/reader031/viewer/2022021818/5aae925d7f8b9a5d0a8c4da2/html5/thumbnails/8.jpg)
Integrated Solver Optimized for the next generation 64-bit platform
Finite Element Solutions for Geotechnical Engineering
Why GTS NX for Tunnels
Friendly Interface
8
Complete Innovating
![Page 9: 3D Tunnel Modeling and Excavation - …northamerica.midasuser.com/web/upload/sample/3d_tunnel_with_pipe... · Angel Francisco Martinez Application Engineer MIDAS NY 3D Tunnel Modeling](https://reader031.vdocuments.us/reader031/viewer/2022021818/5aae925d7f8b9a5d0a8c4da2/html5/thumbnails/9.jpg)
Integrated Solver Optimized for the next generation 64-bit platform
Finite Element Solutions for Geotechnical Engineering
Friendly Interface
9
![Page 10: 3D Tunnel Modeling and Excavation - …northamerica.midasuser.com/web/upload/sample/3d_tunnel_with_pipe... · Angel Francisco Martinez Application Engineer MIDAS NY 3D Tunnel Modeling](https://reader031.vdocuments.us/reader031/viewer/2022021818/5aae925d7f8b9a5d0a8c4da2/html5/thumbnails/10.jpg)
Friendly User InterfaceCommands based on AutoCADWork treeMessage window
Friendly Interface
![Page 11: 3D Tunnel Modeling and Excavation - …northamerica.midasuser.com/web/upload/sample/3d_tunnel_with_pipe... · Angel Francisco Martinez Application Engineer MIDAS NY 3D Tunnel Modeling](https://reader031.vdocuments.us/reader031/viewer/2022021818/5aae925d7f8b9a5d0a8c4da2/html5/thumbnails/11.jpg)
Simplified ModelingAutoCAD geometries ImportVerification of connection before and after meshing
Friendly Interface
![Page 12: 3D Tunnel Modeling and Excavation - …northamerica.midasuser.com/web/upload/sample/3d_tunnel_with_pipe... · Angel Francisco Martinez Application Engineer MIDAS NY 3D Tunnel Modeling](https://reader031.vdocuments.us/reader031/viewer/2022021818/5aae925d7f8b9a5d0a8c4da2/html5/thumbnails/12.jpg)
Advanced MeshingMesh size controlIntegrations of embedded structural elements and connected with mesh
Friendly Interface
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Integrated Solver Optimized for the next generation 64-bit platform
Finite Element Solutions for Geotechnical Engineering
16
Complete
![Page 14: 3D Tunnel Modeling and Excavation - …northamerica.midasuser.com/web/upload/sample/3d_tunnel_with_pipe... · Angel Francisco Martinez Application Engineer MIDAS NY 3D Tunnel Modeling](https://reader031.vdocuments.us/reader031/viewer/2022021818/5aae925d7f8b9a5d0a8c4da2/html5/thumbnails/14.jpg)
Any type of tunnel
Complete
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Parametric Analysis
•Compare results in
same model by
varying specific
parameters.
K0 = 0.5 @4.3mm K0 = [email protected]
K0 = 1.5 @8.3mm K0 = [email protected]
Complete
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Semi Coupled Analysis
- Pore Pressure
- Flow Path
- Nodal Head
Complete
Flow Paths
Flow Quantity
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Jointed Rock Mass and Faults
GTS NX also allows you to model rock faults
using an interface.
A plane of the surface is used to model the
discontinuity.
Complete
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Wizard for easy construction stages set up
Complete
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Structural data base
•Extraction of 2D and 1D elements to model reinforcement as a shotcrete and rock bolts
Complete
Rock Bolts ShotcreteTunnel walls
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Completo
Constitutive Models
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Safety Factor
Cohesion, Friction Angle and tensile strength (optional) can be defined as the failure criteria. Users can find out, potential failure and plastic failure zone directly.
[Modelo : Excavación de túnel en 2D] [Estado de plasticidad: Tensión de Elementos] [Factor de Seguridad (solo aéreas menor a 1.2)]
[Modelo : Excavación Profunda en 3D]
Complete
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TBM
Complete
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Complete
Loads
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Result Extraction
Complete
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Integrated Solver Optimized for the next generation 64-bit platform
Finite Element Solutions for Geotechnical Engineering
28
Innovative
![Page 26: 3D Tunnel Modeling and Excavation - …northamerica.midasuser.com/web/upload/sample/3d_tunnel_with_pipe... · Angel Francisco Martinez Application Engineer MIDAS NY 3D Tunnel Modeling](https://reader031.vdocuments.us/reader031/viewer/2022021818/5aae925d7f8b9a5d0a8c4da2/html5/thumbnails/26.jpg)
Wizard Túnel
Innovative
![Page 27: 3D Tunnel Modeling and Excavation - …northamerica.midasuser.com/web/upload/sample/3d_tunnel_with_pipe... · Angel Francisco Martinez Application Engineer MIDAS NY 3D Tunnel Modeling](https://reader031.vdocuments.us/reader031/viewer/2022021818/5aae925d7f8b9a5d0a8c4da2/html5/thumbnails/27.jpg)
Wizard - General
Input tunnel size and cut type
Innovative
![Page 28: 3D Tunnel Modeling and Excavation - …northamerica.midasuser.com/web/upload/sample/3d_tunnel_with_pipe... · Angel Francisco Martinez Application Engineer MIDAS NY 3D Tunnel Modeling](https://reader031.vdocuments.us/reader031/viewer/2022021818/5aae925d7f8b9a5d0a8c4da2/html5/thumbnails/28.jpg)
Wizard – Reinforcement
Input support distribution and material
Innovative
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Wizard – Excavation
Input Excavation stages and direction.
Innovative
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Wizard – MeshInput Mesh Size and soil properties.
Innovative
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Wizard – Results
Innovative
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Demo
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Modeling 3D Tunnel
Weathered Soil
Soft Rock
Bed Rock
![Page 34: 3D Tunnel Modeling and Excavation - …northamerica.midasuser.com/web/upload/sample/3d_tunnel_with_pipe... · Angel Francisco Martinez Application Engineer MIDAS NY 3D Tunnel Modeling](https://reader031.vdocuments.us/reader031/viewer/2022021818/5aae925d7f8b9a5d0a8c4da2/html5/thumbnails/34.jpg)
Geometry Modeling
1. IMPORT Soil CAD Files (units m)
2. Generate Strata: Extrude -200m
3. Divide layers by the 7 surfaces
1
3
2
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Geometry Modeling
1. Delete 4 left over geometries on borders
2. IMPORT Tunnel CAD Files (units m)
3. Translate tunnel geometry with 2 point vector
3
1
2
Point 1
Point 2
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Geometry Modeling
Connect CAD
1. Imprint 160 points on last face
Shortest path option
2. Auto Connect all solids >
Boolean
3. Check Duplicates before and
after3
1
2
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Material Import
1. IMPORT MATERIAL Properties
2. Open: Final tunnel with umbrella
reinforcement file
3. Import All
3
21
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Mesh Generation
Generate Mesh and Create Elements
Tunnel elements: Size 2m
Varying Soil Properties
1st segments : Weathered Soil
2nd segments: Soft Rock
3rd segments: Bed Rock
Weathered Soil
Soft Rock Bed Rock32
1
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Mesh Generation
Generate Mesh and Create Elements
1. Reinforce Zones with Pipe Beams: 2m
3
2
1
4
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Mesh Generation
Generate Mesh and Create Elements
1. Layer 1: Size 6m / Property Weathered rock
2. Layer 2: Size 12m / Property Soft rock
3. Layer 3: Size 18m / Property Bed rock
Check Mesh
32
1
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Mesh Generation
Create Shell Elements
1. Extract Tunnel Lining
2. Delete ends and bottom
2
1
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Mesh Generation
Generate Mesh and Create Elements
1. Mesh Structural 1D elements
Top and bottom sets
2. Translate Mesh sets in X direction
Copy and move top rock bolts sets 4m 35 times
Repeat for bottom rock bolt set
2
1
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1. Load Conditions
• Self weight load
2. Boundary Conditions
• Auto Ground Support
• Beam rotation restriction
Loads & Boundary Conditions
2
1
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Renumber Tunnels mesh sets
1. Top sets
2. Bottom sets
Construction Stages
21
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Renumber mesh sets
1. Walls - Top sets
2. Walls - bottom sets
Construction Stages
21
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Boundary Conditions >
Change properties
1. 3D umbrella sets
2. 2D tunnel wall sets top
and bottom
Loads & Boundary Conditions
21
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1. Create Stage Set
2. Stage Definition Wizard
• I.S. all soil
• Fill in rules as
shown
• Apply Rules
Construction Stages
2
1
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CS
1. Add Null stage #2: Click ON Clear Displacements and SRM (slope stability)
2. Add Excavation stage #3: Deactivate Cut Excavation set
Construction Stages
2
1
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CS
Add 6 Umbrella mesh sets to stages: S3, S9, S15, S21, S27, S33
Construction Stages
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1. Set CS Analysis Case
Analysis Control• Stress Initiation
• k0 condition
Output Control
• Check on strains
2. Run analysis
Analysis Case
2
1
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Post-Processing
Results
1. Null Stage SRM: FOS 2.2
Strains > Max Shear Strains
2. Stage 43 > Displacements > Total
3. Make cut on Y plane and Probe (3D - 2D
Wizard)
Probe Results from Cut
2
1
3
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Post-Processing
1. Extract Results for construction stages
2. Settlement Profile Tz max
3. On Table Right Click > Show Graph
2
1
3
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Post-Processing
Extract Results for construction stages
Max displacements of tunnel crown
![Page 54: 3D Tunnel Modeling and Excavation - …northamerica.midasuser.com/web/upload/sample/3d_tunnel_with_pipe... · Angel Francisco Martinez Application Engineer MIDAS NY 3D Tunnel Modeling](https://reader031.vdocuments.us/reader031/viewer/2022021818/5aae925d7f8b9a5d0a8c4da2/html5/thumbnails/54.jpg)
Post-Processing
Forces and moments in structural members
1. Truss
2. Beam
3. Shell
2
1
3
![Page 55: 3D Tunnel Modeling and Excavation - …northamerica.midasuser.com/web/upload/sample/3d_tunnel_with_pipe... · Angel Francisco Martinez Application Engineer MIDAS NY 3D Tunnel Modeling](https://reader031.vdocuments.us/reader031/viewer/2022021818/5aae925d7f8b9a5d0a8c4da2/html5/thumbnails/55.jpg)
Integrated Solver Optimized for the next generation 64-bit platform
Finite Element Solutions for Geotechnical Engineering
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