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CASE HISTORY
DOHA RED LINE NORTH
-
CONTROL IN EXECUTION OF SYSTEM PERFORMANCE OF
CONNECTION AND GASKET
Emissione Data Appr...
CASE HISTORY
INTRODUCTION
Fama Spa is an Italian company operating since 1988 in design, certification,
manufacture of pro...
CASE HISTORY
DOHA METRO RED LINE NORTH
DESIGN OF THE LINING
- UNIVERSAL RING 6+1
- KEY 1/3 OTHER SEGMENT
- EX. DIAMETER 6....
CASE HISTORY
EPDM SEALING GASKET
- UG027A
- ANCHORED GASKET 26 x 17 mm WITH
HIDROPHYLIC STRIP
- PRESSURE REQUIRED TO CONTR...
CASE HISTORY
CONNECTION SYSTEM
- SMARTBLOCK 90-160/300-60
- PULL OUT 90 KN
- SHEAR STRENGTH 160 KN
- LENGTH 300 mm
- DIAME...
CASE HISTORY
1. We want to calculate the current state of misalignment and separation of the joints between the segments i...
CASE HISTORY
PROCEDURE FOR DETECTION GAP AND OFFSET OF THE JOINTS
BETWEEN THE SEGMENTS INTO THE TUNNEL
The measurements of...
CASE HISTORY
PROCEDURE FOR DETECTION GAP AND OFFSET OF THE JOINTS
BETWEEN THE SEGMENTS INTO THE TUNNEL
In the diagrams bel...
CASE HISTORY
PRESENTATION OF RESULTS
MEASURES OF GAP IN THE CIRCUMFERENTIAL JOINTS
CASE HISTORY
PRESENTATION OF RESULTS
MEASURES OF GAP IN THE LONGITUDINAL JOINTS
CASE HISTORY
PRESENTATION OF RESULTS
MEASURES OF OFFSET IN THE CIRCUMFERENTIAL JOINTS
CASE HISTORY
PRESENTATION OF RESULTS
MEASURES OF OFFSET IN THE LONGITUDINAL JOINTS
CASE HISTORY
PRESENTATION OF RESULTS
PICTURES OF THE TUNNEL
CASE HISTORY
ANALYSIS OF THE RESULTS
ASSESSMENT OF THE EFFICIENCY OF THE CONNECTION SYSTEM
There have been 294 measurement...
CASE HISTORY
ANALYSIS OF THE RESULTS
ASSESSMENT OF THE EFFICIENCY OF THE SEALING GASKET
The gallery of the DOHA METRO RED ...
CASE HISTORY
THANK YOU FOR YOUR ATTENTION
www.famaspa.it
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Case history doha linea red line north en

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CASE HISTORY DOHA RED LINE NORTH

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Case history doha linea red line north en

  1. 1. CASE HISTORY DOHA RED LINE NORTH - CONTROL IN EXECUTION OF SYSTEM PERFORMANCE OF CONNECTION AND GASKET Emissione Data Approvazione Progetto Rev. S. LUPI 27/10/2014 G. BOMBEN DOHA RED LINE NORTH 1
  2. 2. CASE HISTORY INTRODUCTION Fama Spa is an Italian company operating since 1988 in design, certification, manufacture of products for precast lining of tunnels. Fama Spa is specialized in the development of sealing systems and a wide range of accessories for the connection, lifting and anchoring systems for the construction of tunnels with TBM. For the excavation of the Red Line North di DOHA, FAMA SpA provided the gasket UG027A and the connection systems SmartBlock 90-160 300-60. To complete a strategic path that began with the design and continued with the certification through laboratory tests, with a campaign of measurements, it was possible to document the performance of these products in exercise.
  3. 3. CASE HISTORY DOHA METRO RED LINE NORTH DESIGN OF THE LINING - UNIVERSAL RING 6+1 - KEY 1/3 OTHER SEGMENT - EX. DIAMETER 6.770 mm - IN. DIAMETER 6.170 mm - THICKNESS OF CONCRETE 300 mm - LENGTH OF CONCRETE 1.500 mm - ANCHORED GASKET 26 x 17 mm WITH HIDROPHYLIC STRIP - 19 CONNECTORS FOR RING (3 FOR EACH SEGMENT , 1 FOR THE KEY) - GUIDE BAR AND BOLT ON THE RADIAL JOINT
  4. 4. CASE HISTORY EPDM SEALING GASKET - UG027A - ANCHORED GASKET 26 x 17 mm WITH HIDROPHYLIC STRIP - PRESSURE REQUIRED TO CONTRACT  10 bar  GAP 5 mm  OFFSET 10 mm
  5. 5. CASE HISTORY CONNECTION SYSTEM - SMARTBLOCK 90-160/300-60 - PULL OUT 90 KN - SHEAR STRENGTH 160 KN - LENGTH 300 mm - DIAMETER OF CENTERING 60 mm
  6. 6. CASE HISTORY 1. We want to calculate the current state of misalignment and separation of the joints between the segments in the gallery; 2. The relief is performed with the use of two measurement gauges: one for the depth, with which recalculate the offsets and one for the width of the slots for the recalculation of the gap; 3. The measurements of gap and offset are performed at about 20 mm from the T-joint, where maximums are the deviations from the nominal. 4. The joints are first classified according to the orientation angle to the progress of the excavation; 5. Usually the relief is performed on a continuous succession of five joints, reached by the operator that runs through the tunnel by foot. In case of severe anomalies the relief can be conducted on the entire ring with the aid of suitable lifting equipment. The measuring block 5 of joints may, at the operator's discretion, be repeated several times; 6. The sequence of measurements, if necessary, can be performed on the right side and on the left side of the tunnel with reference to the direction of advance of the excavation; 7. May be conducted in the presence of detections punctual infiltration of water, in order to evaluate if this is generated by an excessive misalignment, or spreading of the coupling or, finally, from other causes; 8. If necessary measurements can be performed on the blocks, facing the opposite of progress to compare with those initial misalignment stabilized along the tunnel. 9. On following the demoulding the segments undergoes a series of finishing treatments and surface covering which involve a thickening of the surface of the segment of some tenths; this causes a negative result in the recalculation of some gaps measured in the tunnel (physically impossible phenomenon). To eliminate this kind of alteration of the measurement, the measured gap values are increased by 0.5 mm. PROCEDURE FOR DETECTION GAP AND OFFSET OF THE JOINTS BETWEEN THE SEGMENTS INTO THE TUNNEL
  7. 7. CASE HISTORY PROCEDURE FOR DETECTION GAP AND OFFSET OF THE JOINTS BETWEEN THE SEGMENTS INTO THE TUNNEL The measurements of gap and offset are performed at approximately 20 mm from the T joint, where the deviations from nominal are maximums. MEASUREMENTS OF GAP MEASUREMENTS OF OFFSET
  8. 8. CASE HISTORY PROCEDURE FOR DETECTION GAP AND OFFSET OF THE JOINTS BETWEEN THE SEGMENTS INTO THE TUNNEL In the diagrams below are identified types of angles between segments of a same ring adjacent each other refer to the direction of excavation.
  9. 9. CASE HISTORY PRESENTATION OF RESULTS MEASURES OF GAP IN THE CIRCUMFERENTIAL JOINTS
  10. 10. CASE HISTORY PRESENTATION OF RESULTS MEASURES OF GAP IN THE LONGITUDINAL JOINTS
  11. 11. CASE HISTORY PRESENTATION OF RESULTS MEASURES OF OFFSET IN THE CIRCUMFERENTIAL JOINTS
  12. 12. CASE HISTORY PRESENTATION OF RESULTS MEASURES OF OFFSET IN THE LONGITUDINAL JOINTS
  13. 13. CASE HISTORY PRESENTATION OF RESULTS PICTURES OF THE TUNNEL
  14. 14. CASE HISTORY ANALYSIS OF THE RESULTS ASSESSMENT OF THE EFFICIENCY OF THE CONNECTION SYSTEM There have been 294 measurements of gap and offset. The average weigth gain of the gap is 0.4 mm, the offset of 1.4 mm. The requirements of the specifications of the Doha Metro Red Line North provide a mounting tolerance of 5 mm on the opening of the joint (gap) and 10 mm on the misalignment of the joint (offset). The connection system SmartBlock allowed a mounting error is much lower than expected. The connection system SmartBlock has minimized the effect of the divergence of the longitudinal and circumferential joints generated by the thrust of the gasket. The performance of the pull-out and shear of the SmartBlock are suited to the conditions of employment, ensuring the correct dimensioning of the system.
  15. 15. CASE HISTORY ANALYSIS OF THE RESULTS ASSESSMENT OF THE EFFICIENCY OF THE SEALING GASKET The gallery of the DOHA METRO RED LINE NORTH is dry. The gasket sealing UG027A has been tested at the University "Tor Vergata” in Rome – Department of Civil Engineering – Structures and Material Tests Laboratory - for the hydraulic performance requirements in the specifications of the project Doha Metro Red Line North. The gasket UG027A requires a load of 45 KN/m for its complete compression facilitating, in fact, the permanence of the closed joint. The anchoring in the concrete of the UG027A and angles conformed to the geometry of the segment, allow, during assembly of the ring, to remain in its seat.
  16. 16. CASE HISTORY THANK YOU FOR YOUR ATTENTION www.famaspa.it

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