080731 6LYG A1 Particular Tunnelling Specification ... - SCATnow
080731 6LYG A1 Particular Tunnelling Specification ... - SCATnow
080731 6LYG A1 Particular Tunnelling Specification ... - SCATnow
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Lee Tunnel, Contract No. <strong>6LYG</strong>/<strong>A1</strong><br />
PT – <strong>Particular</strong> <strong>Tunnelling</strong> <strong>Specification</strong> - PT200<br />
PT221.4<br />
PT221.5<br />
PT221.6<br />
PT221.7<br />
PT221.8<br />
PT221.9<br />
The segment erector shall be fitted with visual and audibile safe lifting alarms.<br />
An interlock shall be provided that prevents extension of the shove rams should<br />
grout delivery through the tail skin be interrupted or blocked. The Contractor shall<br />
provide a method of automatic data logging and measuring volume and pressure<br />
of grout injected per tunnel lining ring.<br />
Condition monitoring of the main bearing the sealing system and main drive<br />
gearboxes to include oil flow, oil pressure, oil temperature including filter analysis<br />
and the measurement of metal parts per million on a regular basis to allow<br />
monitoring of the bearing, sealing system and main drive gearboxes to detect<br />
contamination and wear. An interlock with the cutter head movement shall be<br />
provided to prevent use should contamination occur.<br />
Provide power and torque monitoring.<br />
Interlocking of cutter head torque to shove rams.<br />
Provide Cutter tool electrical wear indicators & alarms.<br />
PT221.10 Monitoring of tail sealer grease delivery, indicating distribution, pressure and<br />
warnings.<br />
PT221.11 Monitoring and alarming of grout volume and pressure delivery interlocked with<br />
advance rate / shove rams – except for final 50mm of the shove<br />
PT222<br />
PT222.1<br />
PT222.2<br />
PT222.3<br />
PT222.4<br />
PT222.5<br />
PT222.6<br />
PT222.7<br />
TBM OPERATION<br />
The Contractor shall provide an air-conditioned TBM control cabin. This shall<br />
contain all remote controls and warning indications for the safe operation of the<br />
TBM and its environment. The operation control cabin should have space for a<br />
minimum of 4 persons. The controls shall monitor and record the operational<br />
parameters of the TBM and its systems including the slurry inbound and<br />
outbound circuits. The cabin shall be equipped with closed circuit television that is<br />
able to observe the tunnel lining build area, the segment supply magazine and<br />
area of entry into the gantry of the locomotive and material delivery systems.<br />
A separate above ground monitoring station shall be provided, it shall duplicate<br />
the controls within the TBM Control Cabin. The station will have direct links with<br />
the TBM and will monitor and alarm all spoil volume checks and grout injection<br />
checks. It shall be supervised at all times during TBM operation by a trained<br />
dedicated Engineer with authority and means to stop the TBM.<br />
Performance Requirements<br />
The Contractor shall design that the TBM is capable of complying with the<br />
minimum performance factors described in this section.<br />
Boring Rates of Advance<br />
The instantaneous rate of advance corresponds to the boring of 1-stroke or width<br />
of the tunnel lining in 15 minutes.<br />
Shove Ram Retraction<br />
Provision shall be made to fast retract and extend individual or groups of rams, to<br />
allow the starting of tunnel ring erection within 1 minute of completing the shove<br />
stroke<br />
Tunnel Lining Supply and Erection<br />
The duration for the building of one ring of segments is defined as the period from<br />
engagement of the first segment by the erector to release of the key segment and<br />
the tightening of bolts. Time = Not greater than 15 minutes<br />
Rates of Advance - Performance<br />
Thames Water Utilities Limited August 2008<br />
Page 16 of 38
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