Leffer fully cased boring method

Casing Oscillator VRMCasing Oscillator VRMCasing Oscillator VRMCasing Oscillator VRMBoring ProcessBoring ProcessBoring ProcessBoring Process

Cast-in-place Pile

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Position casing oscillator to pile spot

Install additional base frameto pile spot

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Install bottom casing

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Install bottom casing

and top casing section

Equipment ManufacturerEquipment ManufacturerGrab out casing materials

Install casing funnelInstall casing funnel

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Grab out casingGrab out casing materials

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Install additional top casing section

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Grab out casingGrab out casing materials

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Pile final depth

Pile Shaft FlushingPile Shaft FlushingPile Shaft FlushingPile Shaft Flushingand Concretingand Concretingand Concretingand Concreting

Pile Shaft Concreting Pile Shaft Concreting Install working platform

Pile Shaft ConcretingPile Shaft ConcretingSteel Cage InstallationSteel Cage Installation

Lower down steel cageLower down steel cage

Pile Shaft ConcretingPile Shaft ConcretingInstall tremie pipe retaining forkfork

Pile Shaft ConcretingPile Shaft ConcretingInstall tremie pipe

Pile Shaft ConcretingPile Shaft ConcretingInstall Concrete Charging Funnel

Pile Shaft ConcretingPile Shaft ConcretingConcrete charging

Pile Shaft ConcretingPile Shaft ConcretingConcrete plug in casing to be 2-3m minimum all the way until pile completionway until pile completion.

Concrete shaft

Pile Shaft ConcretingPile Shaft ConcretingRemove working platform

Pile Shaft ConcretingPile Shaft ConcretingR iRemove casing sections and tremie pipe sectionpipe section

Pile Shaft ConcretingPile Shaft ConcretingI t ll ki l tfInstall working platform and reposition of tremie pipepipe

Pile Shaft ConcretingPile Shaft ConcretingI t ll t i i f k dInstall retaining fork and concrete charging funnel

Pile Shaft ConcretingPile Shaft ConcretingConcrete charging

Pile Shaft ConcretingPile Shaft ConcretingRemove charging Funnel, working platform, and

i i itremie pipe sections. Extract casing sections and remove bottom casingremove bottom casing.