K SUPPORT DRILLING
SYSTEM
PERMANENT MICROPILES AND NAILS
kuechler-technik.ch
2
K Support drilling system
K SUPPORT DRILLING SYSTEM «PATENTED»
DESCRIBED
Through the combination of drilling anchor-pile with intersecting drill bit as well as the support
tube and using the extension adapter, can be extended to any length and deep drilled.
This method enables drilling, offsetting, injection with injection material and injecting all in
one operation. The injection material (KÜMIX ® )is pumped by means of a flushing head through
the rotary drilling anchor-pile, to the drill bit to the deepest drill hole. From the drill bit the
injection material is pressed out under pressure between the drilling anchor-pile, support tube
(cladding tube) and the drill hole. Due to the complete filling of the system this receives double
corrosion protection over the entire length as well as a larger load carrying resistance.
The great advantages of this method are the double corrosion protection and the much faster
work rate.
Before the injection material sets the system also allows the self-drilling anchor pile to be
preloaded in the support cladding tube by setting the drill bit on the support cladding tube and
applying tension to the self-drilling anchor pile This allows the load-bearing resistance against
bending to be increased further.
8
12
6
5
6
9
11
9
13
2
3
1
4
1
7
3
4
5
7
11
1
Drill tube R32 with continuous thread
8
Flushing medium KÜMIX ® (air or water)
2
Impact adapter with centering for cladding tube
9
Soil rock material
3
Cladding tube
(available with slots on request)
10
Flush channel drill tube
4
Connector for cladding tube Ø 60.3, 76, 89, 114 mm
11
Discharge at the drill bit 89, 114 mm
5
Connector for drill tube R32, R38, R 51
12
Discharge of the flushing material at the drill hole R51
6
Spacer cladding tube – drill tube
13
Flushing head
7
Drill bit 76, 90, 100, 115 mm
april 2016
www.kuechler-technik.ch I Tel. +41 (0)41 329 20 20 I [email protected]
K Support drilling system
3
K SUPPORT DRILLING SYSTEM SPECIFICATIONS
OVERVIEW
K SUPPORT DRILL INNER ROD
K SUPPORT CLADDING TUBE
R32/15
R32T
R38/17
R 38/7 TS
R51/28
R51TS
60
76
89
101
114
Failure
loadload
F tk F tk
Failure
kN
380
450
514
700
800
1 250
194
240
388
399
562
Yield strength F sk
kN
340
380
433
600
630
1 100
127
157
254
260
367
Tensile strength F tk
N/mm
Yield point F sk
N/mm 2
Effective
outer diameter
Minimum
outer diameter
Effective
inner diameter
mm
Maximum
inner diameter
mm
12.1
mm
mm 2
Wall thickness
Steel cross-section A
693
> 1 100
607
> 1 100
636
> 1 100
360
360
360
360
360
568.5
> 900
511.8
> 900
505.6
> 900
235
235
235
235
235
mm
32
32
38
38
51
51
60.3
76.1
88.9
101.6
114.4
mm
29.8
31.2
35.5
37.5
48.38
50.4
54.3
70.3
82.5
94.4
105.3
539.77
666.56
861.12
4.14
5.28
6.81
2
Ratio ft / fs (F y)
Weight G
kg/m
Thread direction
Maximum
test load (0.9 F yk ) F p
kN
21.3
15.2
22.5
28
32
8.85
5
10.15
7.1
10.19
9.4
628
430
840
680
1 250
1 150
> 1.21
> 1.21
> 1.18
> 1.21
> 1.25
> 1.22
4.3
3.3
6.66
5.5
5.5
9.4
left
left
left
left
left
left
306
342
390
540
567
900
1 107.79 1 562.24
8.76
9.9
KSB®
– B etter static values as a rod pile
– C ontinuous original
boring thread
– Tempering by cold rolling
of the thread
– L arge injection channel
Type
R32
Annular space rod mm
18.4
25.4
R38
16.1
22.2
28.2
R51
8.9
15.8
23.6
27.1
9.2
15.2
20.9
T64
R76
10.5
14.6
– U p to twice as high pressure absorption due to the outer tube
– N o cross-section reduction through
screwed sleeves
– O n request available in slotted or
perforated versions
Available with different casings
Anchor rod delivery lengths 2, 3 or 4 meters
*Delivery on request
Subject to technical changes
april 2016
www.kuechler-technik.ch I Tel. +41 (0)41 329 20 20 I [email protected]
4
K Support drilling system
SUPPORT DRILLING SYSTEM ACCESSORIES
SPACER
SUPPORT TUBE SHOCK SLEEVE
outer support tube
R32/60.3 x 60
R38/ 76 x 62
R38/88.9 x 60
R51/114 x 110
KSB® COUPLING SLEEVES
– conical ends and central stop
– K Support drill tube is securely compressed with the impact sleeve
inner tension member
R32/120 x 42
R38/160 x 52
R51/200 x 61
– Chamfered ends
– c entral stop without cavity for better impact
transmission
K SUPPORT DRILL - IMPACT ADAPTER
R32/ 60, 76
R38/ 76,90, 114
R51/ 90, 114
– For centered drilling and referencing the support tube
– R emove with bolt
DRILL BITS
R32/ 60, 76
R38/ 76,90, 114
R51/ 90, 114
Further details can be found in
the following documents:
KSB
®
KSB ® PRODUCTS
self-drilling anchor
kuechler-technik.ch
K SUPPORT DRILL WITH EXTENSION SLEEVES
The quick coupling system is a main
characteristic of the K Support drill
coupling system. For a secure connection the couplings are formed
with a central stop.
The inner rod is screwed and
thanks to the conical impact sleeve,
the outer tube is pressed together
with the energy of the hydraulic
impact mechanism of the rotary
hammer.
INJECTION
MORTAR – BINDER
kuechler-technik.ch
april 2016
www.kuechler-technik.ch I Tel. +41 (0)41 329 20 20 I [email protected]
K Support drilling system
5
DRILLING, OFFSETTING, GROUTING
GROUTING TECHNOLOGY
Introducing theK Support
drill system (single use drill bit
with drill tube and cladding tube)
Coupling the K Support
drill system with impact
adapter in drill hammer
with flushing head
Extending the K Support
Drilling the K Support drill
drill system (by threaded consystem during running
grouting with KÜMIX ® sup- nection and outer
impact sleeve, both with central
porting liquid instead of
stop).
flushing out Water flushing
Any extension and thereor air flushing
fore optimally adapted to
(Reflux between drill tube,
geology
cladding tube and drill hole wall).
Little vibration to the
soil due to the external
hammer
Removing the impact adapter and uncoupling inner drill
Further drilling – at the
tubes by means of centering clamp
end of the resulting drill
hole depth the K Support
Install the spacer
drilling system is extended
and retracted in the drill
Subsequent post-grouting of the deepest level of the
hole while injecting and
drill
hole
running at full speed. This
achieves an optimal pile
foot grouting.
DRILLING ACCURACY
13 m
To measure the drilling accuracy, a 13m long drill hole was made at the STEINAG Rotzloch gravel pit
using theK Support drill system 32/76.
The hole and the measurement were performed by
Gasser Felstechnik AG.
Drilling with the K Support
drilling system using
water flushing
Axial bore = 1 %
(approx. 10 cm)
Horizontal bore = 2 %*
(approx. 25 cm)
*H orizontal drilling attachment was
unstable
april 2016
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6
K Support drilling system
ADVANTAGES
CORROSION PROTECTION
Pre-injection systems
K Support drilling system
Broken cement sheath
Inner sheath
using grout
Injected on the construction site with deep W/Z
Connection coupling
Twice wrapped with injection material
Mostly exposed or protected by shrink tubing
Made from steel (smooth or ribbed)
Plastic
Much more robust, no damage possible, thus no
subsequent monitoring required
A lot of damage // danger
Cladding tube
Delivered pre-injected to the site, possible damage from the
injection material during unloading and installation
(hardening without any subsequent deflection and deterioration)
Monitoring required
member
Electrical insulation
Stress cracks
due to load
No electrical isolation
Only at approx. 20–30 % accessible after installation (practical experience)
Additional protection possible by epoxy-coating of the inner support
Risk of damage to the PE-corrugated sheathing during transport,
storage, installation in the drill hole and pulling the piping
By viable outer tube smaller loads on
tension and pressure member
From the deepest drill hole with deeper W/Z factor
Outer sheathing
With jet up to 200 – 500 mm sheathing possible
Full force influence on tension and pressure member
In many cases, filled from above without pressure using a filling
tube
(Air inclusions and higher W/Z-factor)
ANCHORING SYSTEMS
Transmission of force
Load waiting time
K Support drilling system
Pre-injection systems
Very high (large interlocking)
Low interlocking (smoother bore)
1-2 higher surface friction as casing drilling
Re-injection required
Early load possible
Lower W/Z factor, KÜMIX® flushing
Higher W/Z factor, water-air flushing
Stress on pressure
High load reserves due to an outer tube
Less resilient (buckling)
Geology loosening
Drilling with supporting liquid
Destruction through air and water flushing
Renewable
Extended or shortened depending on the geology
Pre-produced length
april 2016
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K Support drilling system
7
INJECTION TECHNOLOGY
K Support drilling system
Pre-injection systems
Injection costs
Low (during drilling)
W/Z factor
Very small, controlled
Mostly high
Injection outlet
From the deepest drill hole, vibrating
Mostly from above
Injection pressure
Development of up to 40 bar
Up to 200 bar possible with high pressure
Without pressure, must be re-injected
Retroactive
DRILLING
K Support drilling system
Pre-injection systems
Drill bit diameter
76, 90, 100, 114, 130, 180 mm
Smaller not possible, 150, 165, 190 mm
Offset time
1–2 faster (one-way)
Time consuming and slow (duplication of tasks - installation,
removal)
Drilling accuracy
Good support tube
Good casing
Vibrations
Very low
Very high
Flushing
KÜMIX® Support agent (injection agent)
Water or air
Drilling equipment
(Hammer)
Outer hammer 50 kg
Drill device
Light drill, excavator drilling attachment (5 tons)
Energy consumption
Approx. 50 kW drill
Wear
Calculable per drill hole through single-use drill bits
Wear on: drill bits, impact shoe and drill tube
Acquisition
Impact adapter
Approx. 10 x higher (drill bits, impact shoe, drill tubes)
Manipulation Manpower
Low installation weight max. 30 kg of 3 m
Installation length
3 m shots possible
larger installation length possible on drilling attachment
Outer hammer 200 kg
In hole hammer min. 2 000 Nm
Equipment twice as heavy and twice as large (at least 8 t)
4 x bigger (200 kW)
86 –126 kW Drill, 124 kW compressor
High tool weight (piping)
Approximately 60-80 kg for internal and external linkages of 2 m
1 m – max. 2 m length
april 2016
www.kuechler-technik.ch I Tel. +41 (0)41 329 20 20 I [email protected]
8
K Support drilling system
SECURING ROADS
Kantonsstrasse Mellingen, AG
Kantonsstrasse Tiefencastel, GR
Gemeindestrasse Kriens, LU
Piles at Kantonstrasse Kriens–Luzern
NOISE PROTECTION
april 2016
Noise barrier BLS Thun
www.kuechler-technik.ch I Tel. +41 (0)41 329 20 20 I [email protected]