TBM main beam support design Alex Vamvakas 311018

TBM main beam support design Alex Vamvakas 31/10/18

Considerations • Independent girders • Lower cost • Easy to assemble and install • Integrated features

Girder section preliminary design • Steel • Standard rectangular hollow section • 250*12 mm • 100 kg/2 m • Supported in • 2 points – Gaussian points • 3 points – extremities and middle 150 mm 250 mm 12 mm

3 points suport Degrees of freedom • 3 vertical support points • Minimizing sag • Combination of movement allows for roll and pitch control • 2 transversal points • Close to the extremities to maximize resolution • 1 longitudinal point • In the middle • Active or not

2 point support • 27 um max sag • Eigen frequencies: • • • 134. 71 182. 73 300. 03 320. 13 435. 15 511. 12

3 point support • 5 um max sag • Eigen frequencies: • • • 199. 14 300. 85 477. 83 495. 92 523. 5 555. 42

K-module • New girder and actuators • Adjustable support for every SAS • Spiral loads • New compact loads for RF network Courtesy Y. Cuvet

Integrated movers • Movers are integrated on the girder • Flexure based joints • WPS are attached directly on the girder • WPS need to open diagonally or supported slightly differently Vertical Do. F Horizontal Do. F

Vertical installation • Movers are assembled on the girder beforehand • Minimizing work in the tunnel • One single connection for electronics • One single connection for cooling Top plate remains attached on the girder Ground plate Wires are not disturbed

SAS adjustable support • 6 Do. F support based on flexures and wedges Courtesy J. Vainola

2 beam module • Support system is identical • Adjustable supports on DBQs • PETS are fixed • New components are introduced here as well

2 beam module • Height reduced to 1 m from 1. 2 m • Waveguides need further layout optimization

Common RF

Common RF girder • RF unit with pre-assembled SAS, PETS, girder and actuators • 3 supporting points • DBQ on active support • DBQ is supported on the same plate

Common RF girder • WPS directly on the girder, close to the beam line • Whole assembly removed vertically