Patents has been granted for the PAS in various parts of the
world.
Below shows the patent document for USA and Singapore.
Patents are pending for Asia, Europe, Australia, India and Middle East
countries.
¡EPile
Socketing into rock and drilling hard strata
1.
Drilling large diameter piles through hard formation and
socketing into rock is inevitable as foundation piles are
¡@
designed
to higher bearing capacity and load safety factor.
2.
The
common method of drilling into hard formation by big drilling torque
machines involves high equipment cost. High
¡@
wear
and tear on drilling tools like the kelly bar, rock auger, core barrel
with tungsten carbide teeth and shanks contributes to extremely high
operating cost.
3.
The
alternative method is to drill with big DTH. This system is generally
effective. However the cost of big diameter
¡@
hammer,
drilling bits and multiple high capacity air compressors are costly
investment. Operating cost and high fuel
¡@
consumption
by the multiple air compressors make the method a costly option.
¡EThe
revolutionary solution --- PAS - Percussion Auger System
¡@
PAS is designed to combine the effects of percussion
and drilling torque.
1.
SINGLE HAMMER UP TO £p 1600MM
¡@
Effective for drilling from 470mm to 1600mm pile
diameter with one single hammer system.
2.
FAST
PENETRATION INTO ROCK
¡@
-PAS can drill into rock
formation at approximately 3 times faster than the hydraulic drilling
rig with rock drilling tools
¡@
-Penetration
rate per meter ranges from 20min to 1hour for rock hardness of 50MPA to
120MPA , subject to various geological and site conditions.
3.
LOW
AIR CONSUMPTION
¡@
-PAS
cost several times less to operate compared to DTH.
-PAS needs only one single air compressor ranging from 750cfm to
1400 cfm operating at 8 ~10bar pressure for drilling holes of £p470mm to
£p1600mm. DTH needs 4 times more air at higher pressure .
-Thus running cost for PAS in area of fuel consumption, air
compressor rental cost is 4 ¡V 5 times less than DTH.
4.
JUST AS EFFECTIVE WITH SMALLER TORQUE MACHINES
¡@
-The
requirement of high torque drilling rigs is no longer crucial as the
PAS can work effectively on smaller drilling torque - even the
mechanical rigs
.
-This contributes to high savings for the capital equipment investments.
5.
REDUCED DRILLING CYCLE TIME
¡@
-The
PAS with flight auger system reduce the drilling cycle time as compared
to the kelly bar / auger system since removing cuttings is only done
after the depth is reach. This is very effective for contiguous pile
and pre-boring of hard ground for secant piles.
-With reverse circulation system, PAS-RC enables continuous drilling
into rock strata.
PRC¡V with
BUCKET jacket for rock socketing and RVERSE CIRCULATION capability,
used when ground water or water supply source is available, effective
both for land and marine piles. PRC allows for continuous drilling.
2.
PCFA ¡V with
continuous flight auger for CFA piles.
PRC / M¡V By a
majority hammer combined into a pneumatic hammer drill bit. with
REVERSE CIRCULATION capability, used when ground water or water supply
source is available, effective both for land and marine piles. PRC / M
allows for continuous drilling.
2.
PRCCB / M ¡V By a
majority hammer combined into a pneumatic hammer drill bit. with
REVERSE CIRCULATION capability, used when ground water or water supply
source is available, effective both for land and marine piles. PRCCB /
M can be pummeled shorten construction time.
PRC
Hydraulic Top Drive Unit is developed for PAS-RC to work without any
hydraulic rig. The Top Drive unit is powered by a hydraulic power pack.
The hydraulic casing clamp clamps on the casing which has been driven
into the ground or sea bed. The Top Drive Unit can be secured onto the
clamp to rotate the PAS-RC.
This configuration is very useful when
rotary rigs are not available or in the situation of Marine Piling.
PAS are made according to the drilling diameter required
for the jobs
¡E
A
range of drilling bit diameter can be fitted onto a single size of PAS.
For details, contact the authorised distributor or manufacturer.
PRS Models
PRS-700
PRS-1000
PRS-1500
Drilling
Bit Ø (mm)
500
~ 650
700
~ 950
1000
~ 1450
Pile
Ø (mm)
550
~ 700
750
~ 1000
1050
~ 1500
Drilling
Rip Capacity (m-ton)
12
~ 18
15
~ 25
18
~ 30
PRC Models
PRS-700
PRS-1000
PRS-1500
Drilling
Bit Ø (mm)
500
~ 650
700
~ 950
1000
~ 1450
Pile
Ø (mm)
550
~ 700
750
~ 1000
1050
~ 1500
Drilling
Rip Capacity (m-ton)
12
~ 18
15
~ 25
18
~ 30
PCF Models
PRS-700
PRS-900
Drilling
Bit Ø (mm)
420
~ 670
720
~ 870
Pile
Ø (mm)
450
~ 700
750
~ 900
Drilling
Rip Capacity (m-ton)
18
~ 25
22
~ 30
PRC-TD Models
PRC-TD
700
PRC-TD 1000
PRC-TD 1500
Drilling
Bit Ø (mm)
500
~ 650
700
~ 950
1000
~ 1450
Pile
Ø (mm)
550
~ 700
750
~ 1000
1050
~ 1500
* REMARKS:
1. Above specs
are general recommendation for average pile depth of 10m to 15m.
2. It may increase
according for deeper piles and different geological conditions.
3. When in doubt,
please discuss with the manufacturer for recommendations.
PAS - Lubricating Oil Tank
¡@
The
Percussion Auger
operation requires oil lubrication. The Lubricating Oil Tank stores oil
of specifications ISO46~220. The tank is to be connected to the outlet
of the air compressor leading to the air hose that connects the
Percussion Auger. The regulating valve is adjustable to regulate the
required amount of lubricating oil for the PAS operation. Constant
supply of lubricating oil to the percussion auger is critical to
prevent premature wear and damage to the internal mechanism.
