MERSEY KINGSWAY TUNNEL: CONSTRUCTION PAPER 7481

THE PAPER DESCRIBES THE CONSTRUCTION UNDER THE RIVER MERSEY OF 'TUNNEL 2A' OPENED IN JUNE 1971, AND OF ITS DUPLICATION, 'TUNNEL 2B' STILL PROCEEDING. UNUSUAL ENGINEERING PROBLEMS, NOVEL FEATURES AND CONSTRUCTION DIFFICULTIES ARE DEALT WITH IN SOME DETAIL. THE TUNNEL WAS DRIVEN MAINLY IN BUNTER SANDSTONE BY MACHINE. THE ROCK DID NOT RESPOND SATISFACTORILY TO TREATMENT BY INJECTION. COPIOUS INFLOWS OF SALINE WATER AFFECTED PLANT, HAMPERED WORK, AND OFTEN TURNED THE SPOIL AT THE FACE TO SLURRY. POOR AND SLABBY ROCK IN THE ROOF PRODUCED MATERIAL VERY DIFFICULT TO HANDLE, PARTICULARLY WHEN MIXED WITH THE SLURRY. THE TREATMENT OF A MAJOR FAULT, THE CHANGING OF THE MAIN BEARING OF THE MOLE AND THE REPAIR OF SEVERE DAMAGE TO THE MACHINE CAUSED BY BREAKAGE OF A PINION, ALL NEAR MID-RIVER, PROVIDED SOME INTERESTING FEATURES IN DRIVING TUNNEL 2A. EXPERIENCE GAINED, ADDED TO THE SKILLS REQUIRED ON THAT DRIVE, ENABLED TUNNEL 2B TO BE DRIVEN AT MUCH GREATER SPEED (A).

Media Info

  • Features: Figures; Photos; Tables;
  • Pagination: p. 503-33
  • Serial:
    • Volume: 51

Subject/Index Terms

Filing Info

  • Accession Number: 00210063
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: TRIS
  • Created Date: May 24 1974 12:00AM