Piling Work
Name of Work & Description
Pile
Foundation: Pile Foundation is a type of Deep Foundation which is recommended
by geotechnical engineer due to many reasons like depth of hard rock, soil
bearing capacity, the height of the structure, loads of buildings, etc. Pile foundation is
more reliable than open foundation because which is directly anchored in hard
rock but need to follow standard procedures while working.
Worlds highest building has a pile foundation like Burj Khalifa, Shanghai Tower, Petronas Tower, Makkah Royal Clock Tower, Entiser Tower, Ping An Finance Centre, Lotte Tower, Taipei 101, One World Trade Centre, etc. also a lot of The bridge has a pile foundation.
Building
in Roman Cities of Ravenna & Venice in 100 B.C. to 400 A.D. as well as
London River Thames bridge was built on Timber Pile in 60 A.D. on Piles.
Advantages
of Timber pile is as Follows
1 low
material costs,
2 Durability
is more than100 years with reinforced concrete Pile,
3 Installation
of Piles with less Centre to Centre spacing,
4 Resistance
to acids and chlorides,
5 Anti-corrosion
protections not required,
6 Easy
for transport’ handling and installation,
7 Wood piles can be cut on-site with the chain saw no need to do any special treatment,
8 Wood is
eco-friendly material.
Types of Pile Foundation
1 Pile
Foundation
2 Mono
Pile Foundations
3 Under
Reamed Piles
4 Auger
cast Pile
5 Micro
Pile
6 Tripod
Piles
7 Sheet
Piles
8 Soldier
Piles
9 Screw
Piles
10
Suction Piles
11
Adfreeze Piles
12
Hospital Piles
13 Secant
Pile Walls
14 Slurry
Walls
Type of Pile as Per Material
1 Iron
Piles
2 Timber
Piles
3 Steel
Piles
4
Prestressed Concrete Piles
5
Composite Piles
IS Code No.
IS Codes For Pile Foundations are as Follows:
Driven
cast in-situ concrete piles: IS 2911: Part 1: Sec 1: 1979
Bored
cast-in-situ piles: IS 2911: Part 1: Sec 2: 1979
Driven
precast concrete pile: IS 2911: Part 1: Sec 3: 1979
Bored
precast concrete piles: IS 2911: Part 1: Sec 4: 1984
Timber
piles: IS 2911: Part 2: 1980
Under
reamed piles: IS 2911: Part 3: 1980
Load
test on piles: IS 2911: Part 4: 1985
Safety
code for piling and other deep foundations: IS 5121: 1969
Specification
for pile driving hammer: IS 6426: 1972
Glossary
of Terms Relating to Pile Driving Equipment: IS 6427: 1972
Specification
for pile frame: IS 6428: 1972
Guide
for lateral dynamic load test on piles: IS 9716: 1981
Pile
boring equipment – General requirements: IS 14362: 1996
Bored
cast-in-situ piles founded on rocks – Guidelines: IS 14593: 1998
Non-Destructive Integrity Testing of Piles (NDT) –Guidelines:
IS 14893: 2001
The Drawings needs to Read
Following Drawing Need to Read carefully while working on the Pile Foundation on Site.
1
Building Layout
2 Pile
Foundation Plan
3 Details
of Piles
4
Schedule of Piles
5 Details
of Pile caps
6 Section
of Pile
Location of Work
Pile Foundation is Sub-base structure so it is available under the ground or under the water. But we can differentiate the exact location of pile foundation as follows.
1 Pile
Foundation: Distribute the load of building through pile cap and all pile cap
is attached through the plinth beam.
2 Mono
Pile Foundations: For Wind Turbines
3 Under
Reamed Piles: For expansive soils which
are often subjected to seasonal moisture variations, or for loose or soft
strata.
4 Auger
cast Pile: Suited for use in
contaminated soils, because of expensive waste disposal costs.
5 Micro
Pile: useful at sites with difficult or restricted
access, or with environmental sensitivity.
6 Tripod
Piles: traditional ways of forming piles.
7 Sheet
Piles: Suited for Retaining wall and Cofferdams.
8 Soldier
Piles: Suitable at over-consolidated
clays.
9 Screw
Piles: For Light House in 19th Century
10
Suction Piles: Suited at Clay and Muddy Soil Area
11
Adfreeze Piles: At High Latitude in the Continuously frozen area
12
Hospital Piles: These Piles
are built to provide temporary support to marine structure components during
refurbishment works
13 Secant
Pile Walls: space is left between
alternate female piles for the subsequent construction of male piles.
14 Slurry
Walls: is a barrier built underground using a mix of
bentonite and water to prevent the flow of groundwater.
Standard Procedure of Work (Step by Step)
The procedure needs to follow while piling Work.
1 Study
all Drawing carefully before marking.
2 Make Pillar
3m away from building face in Brickwork and Building face Marking should be
done on them.
3 Mark
All Pile Centre point and fix this point with rod and fix by Concrete.
4
Mobilize Machine on Site and check pile center and machine rig center by plumb
bob.
5 start
piling, fix casing pipe and always check the depth and take every 1-meter sample,
and put it in a carry bag.
6 Check 2
time of diameter of pile embeds in hard rock. And take the final sample.
7 Prepare
Reinforcement steel cage as per the given design and as per drawing.
8 Put the
reinforcement steel cage in an empty pile.
9 Install
temporary concrete pipe with the funnel.
10 Fill /
Cast it by Concrete as per given Concrete grade.
11 Do
Compaction by Concrete pipe.
12 After
filling the pile, Remove Concrete Pipe and Casing Pipe.
13
Proceed for the next pile.
14 After
28 days of concreting check load test of the pile.
Quality Checks
Following tests need to do after piling work1 Pile Load Test
2 Pile Integrity Test
After completion of this course, we will give all the details information about the pile load test and pile integrity test.
Equipment and Machinery
Following Machine and Equipment are required to do the piling work.
Rotary Pile1. Piling Machine with Chisel and Bailer
2. MS or SS Casing Pipe set as per required Diameter
3. MS Funnel for Concreting / Hopper
Tripod Pile
1. MS Tripod with Necessary Arrangement.
2 Manual Pile Machine
3 Bailer & Chisel as per given Diameter or Given Size
(Rectangular or Circular, etc)
4 Casing Pipe set as per required Diameter
4 Casing Pipe set as per required Diameter
5 MS Funnel for Concreting / Hopper
Measurement and Quantity Survey
Piling work Should be Measured as per the actual depth of the pile and size of the pile. Piling work quantity calculation depends on the actual depth of the pile and actual size of pile but some times due to internal invisible voids in under the ground we need to consider 35% to 40% extra concrete quantity because there may be a possibility of require extra concrete and pile concrete can not be done partly, pile concrete should be complete for the first time.
In
Underwater pile there is considered a casing pipe around the pile so therefore
there is less chance of extra concrete but at the bottom of the sea surface of
water surface there is chances of spreading some concrete.
Here we
are checking the procedure of the workout of Concreting quantity survey.
Work Description: 600mm Diameter of Pile having
depth up to 13meter. Calculate the volume of concrete.
The volume of Concrete: Area of Circle X Depth of
Pile : πr2 X h
Î : 3.14 Constant
r: Radius of Pile
h: depth of Pile.
Volume of Concrete: 3.14 X (0.3*0.3) X 13m:
3.67 Cum + 40% wastage: 5.13 Cum
Wastage will be change as per the actual situation
of site.
The same calculation should be followed in
rectangular Pile concreting work.
Work Description: 900mm Length X 600mm width of
Pile having depth up to 13meter. Calculate the volume of concrete.
The volume of Concrete: Area of Rectangular X Depth
of Pile: l X b X h
Î : 3.14 Constant
l: Length of Pile
b: Width of Pile
h: depth of Pile.
Volume of Concrete: 0.900 X 0.600 X 13.00m:
7.02 Cum + 40% wastage: 9.828 Cum
Checklist
1 Check center of pile
2 Check
location of pile
3 Check depth
of pile
4 Check
all levels sample as per strata design.
5 Collect
all samples at all levels.
6 Cross
check and ensure the end of pile is 2 times of the diameter of pile hard rock with
the help of sample.
7 Check
the Steel Cage as per drawing and all side covers are installed.
8 Check
the Steel Reinforcement cage in installed in Pile shaft properly.
9 Check
Concrete grade, slum, fill cubes
10 Check
Compaction while concreting.
11 Check
Pile Load Test.
On-site Experience
Pile
Foundation is a very important part of the foundation if you are proposed the building
or any structure at near water like a creek, near the sea, backfilled area, muddy
soil, or heavy designed high-rise building then there is only one option of
Piling. As well as in metro cities there is a huge problem of population and bad
town planning, therefore a lot of peoples are live near this riverside or nalla
side but this is too risky is the rainy season but the municipal corporation is got a good solution to fix the boundary of nalla as well as protection of peoples,
they do rectangular piling work all both side of nalla and make retaining the wall on it. This will be done a lot of benefits to all. But piling is costly than
open footing but there is no alternate option in muddy soil or underwater
bridge foundation, elevated metro, dam foundation, etc. before start the piling
work need to take proper care of centerline of the pile on the exact marking of center
of pile.
Mr. Rajnikant
(Source: Wikipedia, Internet, and Books)
Team
CBEC India
(Source: Wikipedia, Internet, and Books)
Team
CBEC India
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