Lovat's TBM DesignThe custom designed LOVATMPI46SE has the capabilityof operating in either EPB,semi-c1osed or open mode.TheTBM commenced operation in EPB mode, utilizing thescrew conveyor. As ground conditions change, the screwconveyor is interchangeable with the belt conveyor toallow semi-c1osed or open mode operation.To determine what types of soil are ahead of the TBM,

an exploratory probe drill with a portable control table ismounted on a flat car. The probe drill has access to fiveseparate drilling ports which pass through the cuttingheadof the TBM.The LOVAT MP146SE incorporates an ergonomically

designed air-conditioned eperator's cabin on its back up

BoreDiameter: 37m

TBM length: 7.6m

TBM & Back-Up length: 75m

TBM Weight: 165 tonne

Cuttinghead Articulation: 2 2'

Cuttinghead Rotation: 20 to 40 RPM, Bi-Directional

Cuttinghead Power: 376 kW

Total Connected Power: 613 kW

TBM Propulsion: 10 Cylinders, 1 73m stroke

Total Thrust: 1.250 tonne

Muck Removal System: 610 mm dia Screw Conveyor610 mm wide Belt Conveyor

Special Features: Operators Cabin located on Back upFoam lnjection SystemPolymer Injection SystemGrout Injection SystemPower Pack located in Shield

otaJ Grout Pump strokesRoII __ al9999

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The data screens can be viewedfrom the operator's console as weil

as from a surlace computer.

The ergonomically designed

operator's cabin.

system. This design permits tunnelling personnel to oper-ate the machine from a safe distance when mining. Theeperator's console houses all of the electronic remotecontrols necessary to operate the TBM functions.The con-sole also includes an industrial workstation which canrecord and display information with full colour graphics.Precast concrete segments are used to line the tunnel

and are transported to the unloader via segment cars.Thesegments are unloaded and fed by the segment monorailto the arm erector. The segment ring design consists offive pieces plus a key.Mounted on bogey-wheeled gantry sections, the back

up system includes the following auxiliary equipment:• Foam Injection System, consisting of three 500litres/min. foam generators, for foam injection into theface of the cuttinghead, mucking ring and along thescrew conveyor casing.

• Polymer Injection System, with a Moyno Pump and 2m3

tank, to supply polymer to the injection ports.• Grout Injection System, with a capacity of 10m3 Ihourat 50 bar. Grout is pumped in from the surface to a 2m3hopper tank, then distributed through grout injectionlines.

• A workshop station, storage area, lunchroom, first aidcloset, and a chemical washroom are also incorporatedon the gantry to accommodate tunnelling personnel.

Tile ProjectThe "Liaison Auteuil - Saint Cloud" plays a vital role in theprogram to clean up the River Seine.lts goal is to allow thetransportation of effluents from the main Parisian sewersand from other departmental collectors. These effluentsare then moved directly toward the Seine-Aval purificationfactory inAchéres or the Seine-Centre purification plant inColombes. This new circuit leads to a better utilization ofthe existing network and reduces the quantity of rain efflu-ents running into the Seine, thereby improving the waterquality at this point of the river.

The construction contract was awarded to ajoint venture of:

Quillery - Travaux Publies et

Grands Travaux, Noisiel

5ADE - Compagnie Générale de

Travaux d'Hydrauliques, Paris

Geological ProfilelOOm

~--------- Shaft RI9 at St.Cloud

90

80

70

60

50

40

30

20

10

1.205 km

Starting ShaftLongchamp Shaft is located in the park of "Bois deBoulogne" on the border of the River Seine. The LOVATMP146SE was lowered into the shaft, 31m deep, 9.6m indiameter. A 16m tail tunnel was excavated to permit theTBM train manoeuvres and water pumping equipment wasinstalled to discharge the ground water.The DriveThe completed tunnel will have an inner diameter of 3.0m,an outer diameter of 3.5m and a length of 1.205 km.Thetunnel alignment is a straight drive with a constant upwardslope of +2.1 1%.Crossing I50m under the Seine River, the tunnel then

progresses under buildings and major road intersectionsrequiring maximum control of ground settlement. Theentire alignment lies below the water table and, at the tun-nel invert, the water column varies from a minimum of 6mto a maximum of 30m.At the end of the tunnel excavation,the TBM will arrive at the base of a lOm deep shaft in theSt. Cloud area.The tunnel is excavated entirely in chalk, which appears

in different states of alteration due to the varying materi-als overlying the chalk stratum.The chalk alteration is con-siderable, particularly along the crossing of the river.

.Fitl o C1ar

o Alluvia 11 "Meudon" Marl

11 Talus. Rock Fragments • "Meudon" Llrnestone

• Marl Chalk

Longchamp Shaft 11 "St. Ouen" Lirnestone Fragmemed Chalk

'Beaucharnp" Sands o Altered Chalk

11 Marl and Llmestone o Pissured Chalk

lil Limestone

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The Liaison Auteull St. C10ud is one of many projects

where lOVAT TBMs are globally recognized for their

versatility and technical innovation. With offices located

in North Arnerica, Europe and Asia, and a netwerk of

International Representatives, lOVAT provides unsur-

passed service through to project completion.

For your local lOVAT representative please contact

our head office.

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