Bohrsysteme Engl
Transcript of Bohrsysteme Engl
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Mast Torsion-resistant box
construction with
optimised weightconstruction
Capacity for trans-
ferring maximum torque
over full length of mast
Construction in one or
two sections and inter-
mediate sections as
mast extension
Rotary Drive In three variants:
Gear box with one gar
(constant drive,Gearbox with two gears,
Gearbox with three
gears (3rd gear used
as spin-off gear).
Interchangeable
kelly drive adapter
for easy replacement
of wear parts
Shock absorbing
elements to
protect against
dynamic axial loads
Winches Optimum conversion
of engine power into winch
line pull and speed.
Wide grooved drum and rope
roller guide for clean rope
spooling in all layers.
Designed for heavy-duty
continuous operation (winch
classification M6 / T3 / L5).
Free-wheeling winch or
freefall facility winch with
residual line pull and slack
rope automatic
Crowd SystemFor vertical pulling or pushing of rotary drive and drilling
tool with:
Crowd cylinder (with additional fast crowd speed) Crowd winch (with dual-action hoist/pull-down winch and
additional fast crowd speed), wear-reducing permanent
tensioning of crowd rope with rope tensioning cylinder.
Mast Link Frame System H type: parallel motion kinematic system, backward
lowered mast for easy and rapid transportation and
generous horizontal mast adjustment for positioning rig
over drilling position.
V type: with large backstay cylinders.
Excellent stiffness of kinematic system (advantageous
when drilling in rock or constructing of secant pile walls)
Forward lowered mast for transportation of rig.
Engine and Hydraulics Robust Diesel engines of well-known plant manufacturers
with modern electronic fuel injection systems (complying
with the latest exhaust gas emission standards.
High cooling capacity even in high ambient temperatures
High hydraulic power output with maximum power
efficiency due to generous design of gate valves and hose pipes.
Most advanced hydraulic systems with integrated load-
sensing, LUDV systems and required volume control when
using different drilling processes (e.g. drilling with kelly,
attachment of casing oscillators, double rotary drive systems)
Control systems developped by BAUER are designed for use
in rough site environments and conditions of extreme
temperature ranges
Undercarriage Transfer reaction forces from torque and crowd to the
working platform. BAUER undercarriages are designed on
the following principles:
Extendable, large ground bearing area and high
transferable overturning moments.
High traction forces (approx. 70% of the operating
weight) for travelling over uneven soft ground.
Low-maintenance as track drive sprockets, idler
wheels and lower rollers are sealed for
lifetime lubrication. Crawler frames are extended and
retracted in a single uninterrupted
operationData Acquisition and Visualisation(B-Tronic): Visualisation system with PC and coloured Touch-Screen
monitor and integrated monitoring and recording system.
Modular presentation of process-specific prodution
and rig operating data
Recording and storage of all production data for quality
assurance (e.g. pile record sheets) and data analysis
Assistance during rigging and de-rigging by on-screen
work instructions
Service support by fault messages from the
control elements
Data Transmission Recorder DTR Recording of precise rig position via GPS system
Transmission of all data stored in the rig via GSM
data channel (mobile telephone network)
Main Components
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Drilling with Kelly
Classic bored pile system which transfers torque and verticalcrowd force to drilling tools via a telescopic kelly bar.
Borehole wall is supported either by excess hydrostatic pressure
or by drill casings.
Installation of drill casings by rotary drive or by casing oscillators
attached to rig.
By using different drilling tools the system can be employed in all
types of soil (including bedrock).
Diameters 600 - 3000 mm
Drill ing depth 15 - 90 m
Drill casing and auger are drilled into theground simultaneously by two rotary drives
rotating in opposite directions.
The soil which is loosened at the auger tip is
conveyed to the surface by the auger flight
inside of the casing and discharged through
a gate underneath the rotary drive.
Concrete is placed through hollow stem
auger as drill casing and auger are
simultaneously withdrawn.
A special design of the rotary drives allows
the construction of piled walls directly in
front of existing walls of adjacent buildings
(=> FoW system). The usable excavation pit
area is maximised. Diameters 305 - 508 mm
Drill ing depth 10 - 18 m
Drilling Systems
Twin Rotary Drive Drilling Systemfor small diameters (FoW)
Drilling with Continuous Flight Auger (CFA)
Significant increase of drilling performance can be reached when
using a continuous flight auger which is installed in one
continuous pass:
The soil which is loosened at the auger tip is conveyed to the
surface by the auger flight.
Borehole wall is supported by the auger filled with drill spoil.
Use of a crowd winch facilitates penetration into hard soilformations.
Attaching a kelly extension increases the drilling depth by 6 - 8 m.
Pile is concreted through hollow stem by means of concrete
pump.
Concrete is pumped by a concrete pump through the hollow
stem of the auger while extracting the auger. Concrete feed pres-
sure can be measured at the tip of the continuous flight auger.
Diameters 500 - 1200 mm
Drill ing depth 10 - 28 m
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Twin Rotary Drive Drilling System for largediameters
A long outer casing and an inner continuous flight auger are
drilled into the ground simultaneously by two rotary drives
rotating in opposite directions, assisted by the crowd force of the
crowd winch system.
Concrete is placed through hollow stem auger as drill casing and
auger are simultaneously withdrawn.
The system is used for constructing bored piles and secant pile
walls.
Technique can be employed in all types of soil without rock
formations and boulders.
Diameters 600 - 1200 mm
Drill ing depth 12 - 20 m
Soil Displacement Piling System
The displacement tool which is mounted at the bottom of a drill
rod is drilled and pushed into the ground with high torque and
crowd pressure.
Concrete is placed by a concrete pump through the hollow stem
of the displacement tool which is simultaneous
withdrawn.
Full displacement of the soil keeps the working area
free of drill spoil, which allows easy manouevering of
the rig on site.
Effective soil displacement increases load carryingcapacity of the pile.
When working in contaminated areas, expensive
disposal of contaminated drill spoil is avoided.
Commercially advantageous due to high drilling output
and minimal disposal of drill spoil.
Ideally suited to homogenous granular soils of up to
medium dense state of compaction.
Diameters 400 - 600 mm
Drill ing depth 10 - 28 m
Soil Mixing Wall System (SMW)
Mixing self-hardening slurry in-situ with native soil (SMW system)
offers a cost-effective technique for the construction of cut-offand retaining walls.
When drilling and pushing the mixing tool into the ground with
three independent rotary drives, the soil is broken down and mixed
with the slurry which is continuously injected through the drill stem.
The absence of spoil removal and the utilisation of the native soil
as a construction material increase the cost-effectiveness of the
technique.
A continuous wall is constructed by installing overlapping individual
primary and secondary wall elements in an alternating sequence.
The verticality of the wall is monitored by
automatic inclinometer measurements in the
outer drill stems.
Compressive strengths ranging from 2 MPa
(for cut-off walls) to 8 -10 MPa (for retainingwalls) can be achieved depending on type
of soil and cement content.
Wall thickness 350 - 550 mm
Depth 8 - 15 m
Drilling Systems
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Torque and vertical crowd force are transferred by telescopic kelly bars
to the cutting teeth of the tool. The lockable kelly bars have the following
characteristic design features:
Six drive keys with large lock recesses for transfer of torque and
crowd
Spring-mounted shock absorber unit
Standardised square kelly drive stub for all drilling tools.
Drilling depths up to 100 m
Transfer of torque ranging from 120 kNm to 480 kNm
BAUER drilling tools have been designed
for heavy duty BG rig applications and
have been developed on our own construc-
tion sites to reach serial production status.
Single or double start augers (SB)
fitted with cutting teeth are used for
drilling in unsaturated soils.
For cutting into rock tapered rock
augers (SBF-P) and rock augers (SBF)
are employed faced with round shank chisels.
Saturated soft to hard soils are generally
cut and excavated by drilling buckets
(KB). A large ventilat ion pipe incorporat-
ed into the tool prevents the formation of
a vacuum during extraction of the tool.
Drilling buckets KBF are used for dense
soil and soft to medium rock.
Hard rock formations can be pre-cut with
coring buckets KRR. The cutting ring of
coring buckets is faced either with tungsten
carbide inserts or round shank chisels.
Coring buckets KRR-M with rock roller
bits are used for cutting in very hard rock.
Double-walled drill casings are used as support for the borehole
wall and in the construction of pile walls. 2 - 6 m long casing
sections are joined together by way of casing joints secured by
casing screws to form a drill string. Special casing shoes faced with cutting teeth facilitate easy
penetration of the soil. Drill casings can be drilled into the ground
by the rotary drive. In this case the casings are connected to the
rotary drive by way of a casing adapter. Automatic casing
adapters can be employed to increase both site safety and
productivity.
By inserting a torque converter between rotary drive and casing
adapter the torque for installing the casing string can be doubled.
For heavy-duty casing operations a hydraulic casing oscillator is
attached to the undercarriage of the
drilling rig and connected to the on-
board hydraulic system.
Drilling Tools and Accessories (Drilling with Kelly)
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BG 12H BG 15H BG 18H BG 24H BG 25H BG 40H
BG System
Gesamthhe (m) 17,9 19,1 20,8 21,9 25,4 25,9
Overall height (m)
Drehmoment (kNm) 116 151 176 233 245 390
Torque (kNm)
Hauptwinde (kN) 110 140 170 200 250 250
Main winch (kN)
Vorschubkraft Winde (kN) 200 200 260 200/330 330 450
Crowd force winch (kN)
Hub Winde (m) 12,0 13,9 14,7 15,4 17,6 18,4
Stroke height winch (m)
Bohrdurchmesser (mm) 1200 1500 1500 1700 1900 2300
Drilling diameter (mm)
Bohrtiefe (m) 40 45 53 54 69 70
Drilling depth (m)
Fahrwerkslnge (m) 4,70 4,75 5,10 5,30 5,40 6,20
Crawler length (m)
Einsatzgewicht (to) 41 53 58 77 95 120
Operating weight (to)
Motorleistung (kW) 153 173/187 210 260 300 365 420
Engine power (kW)
Gertetrger BT 35 BT 45 BS 55 BS 70C BS 80B LH R 954
Base carrier CAT 325C
Technische Daten (H - Gerte)Technical Data (H - Version)
3/2004
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BAUER Maschinen GmbHWittelsbacherstrae 5
D-86529 SchrobenhausenTel. +49 (0)82 52/97-0Fax +49 (0)82 52/97-11 35e-mail: [email protected]
905.
605.
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