Bohrsysteme Engl

7/31/2019 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


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.




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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.



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.



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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