Piled Foundation for the Chiapas Bridge in Mexico

Transcription

Localización de la obra
Piled Foundation for the Chiapas Bridge
in Mexico
God Morgen mine Damer og Herrer !
Wolfgang G. Brunner
Maschinen
Location of State Chiapas in Mexico
State Chiapas in Mexico
Chiapas Bridge
Location of the Jobsite
Veracruz
Puente Chiapas
Procedimiento no. 1
Chiapas 1
Oaxaca
Procedimiento no. 2
Chiapas 2
Chiapas
Data of Chiapas Bridge
Datos generales de proyecto
• Length 1208 m
• Drilling depth 56.0 m
• Height above water 10 m
• Contract amount including
• Maximum total length of
drilling string 148.5 m
• Maximum water depth 92.5 m
VAT 100 million US $
• Execution period of
foundation 7 month
Construction of Pier Foundations
Stage 1:
Fabrication on land of steel jacket on its side comprising four 2.80
m dia. steel tubes and struts.
Stage 2:
Floating jacket into position of pier with side buoyancy tanks.
Stage 3:
Up-ending of jacket
Driving four Ø 1000 mm dia. tubular support leg piles with
structural connections to jacket.
Stage 4:
Construction of working platform on top of jackets, lifting
hydraulic casing oscillator onto platform and fixing it onto
platform. Installation of 2500 mm dia. drill casing comprising a
sacrificial section jointed onto the bottom of the main casing
section.
Stage 5:
Mounting and connecting BA 2500 top drill on drill casing.
Stage 6:
Installation of drill head, ballast rods and air-lift pipe assembly
with casing guides.
Stage 7:
Drilling down with air-lift flushing as the casing oscillator rotates
the 2500 mm dia. drill casing and jacks it down with its powerful
hydraulic rams.
In order to reduce the frictional resistance on the drill casing,
three hydraulically operated roller bits are extend laterally during
drilling. They underream the casing shoe.
Embedment of drill casing in conglomerate up to 20m.
Stage 8:
Drilling with fully extended roller bits to final depth.
Stage 9:
Lifting top drill off drill casing, removing drill string and drill head.
Cutting drill casing inside steel jacket tube approximately 5 m
above bottom end of steel tube.
Stage 10:
Raising upper section of drill casing and holding it in position with
casing oscillator.
Stage 11:
Installation of reinforcement cage, which extends from the base of
the pile to 5 m above the top of the enlarged pile head.
Stage 12:
Lowering tremie pipe assembly into drill casing and concreting
pile to top of reinforcing cage.
Stage 13:
Extracting upper drill casing string.
Stage 14:
Constructing remaining three piles.
Steel Jackets:
Fabrication
Launching
Floating into Position
Jacket Manufacturing Yard
Fabrication of Jackets
Fabricación de jackets
Launching of Jacket
step 1: pull jacket
winch
step 1: retract jacket
step 1: float jacket
Launching of Jacket
Botado de los jackets 8, 7, 6 y 5
Jacket no 8
Jacket no 7
Jacket no 6
Jacket no 5
Launching of Jacket into Water
Floating Jacket into Position
Step 1: float to position
Step 4: vertical position
Step 2: turn through water inflow
Step 3: continue turning
Step 5: remove floating body
Step 6: install steel piles
with diesel hammer
floating valves
guides for
steel piles
floating body
Transporte
length 70
m
Ziele der Bodenverbesserung
Floating
Jacket into Position
Drilling with RC Drill:
Drill
Installation of Casing
Mounting of RC Drill
Drilling in Conglomerate and Rock
Principle of RC (Reverse Circulation) System
0
-20
-20/25
-30/35
Construction of Working Platform
Preparation of Drill Casing
Dia 2500 mm
Installation of Casing with Oscillator
Installation of Casing and RCD Drill
RC Drill BA 2500
Installation of Casing and Drilling into Rock
RCD drill rig BA 2500
oscillator BV 2500
casing dia 2500 mm
open hole drilling
Rock
Drill Head with Underreamer Dia 2350 mm
underreamer roller
Stabilizer and Flanged Drill Pipes
Stabilizer and Flanged Drill Pipe
Stabilizer and Flanged Drill Pipe
Drilling with RC Drill and Oscillator
Drilling with RC Drill and Oscillator
Underreaming the Casing during Drilling
hydraulic power pack for moving
out the underreamer rollers
casing
movable
roller
rock
Drilling at Jacket No. 8
Remove Casing
cutting drill casing with diver, max water depth 80 m
and recover the cut off casing section
oscillator BV 2500
cut casing by diver
casing dia 2500 mm
Rock
Completion of Pile:
Installation of Reinforcement Cage
Placing Concrete
Pipes for concrete
inspection
placing reinforcement cage into the borehole
casing dia 2500 mm
uncased bore in rock
Rock
Concreting the Pile
c
c
n
o
te
e
r
ete
r
nc
o
c
concrete
concrete
tremie pipe
casing dia 2500 mm
uncased bore in rock
Rock
Concrete Pipe Line from the Shore to the Pier
Raked Piles
Pile diameter: 1300 mm
Pile length:
up to 50 m
Inclination: 1: 3
Bridge Deck Construction:
Construction
Construction of Pier Heads
Pushing Bridge Deck
Concreting of Pier Head
22.7.2000
Pier Overview
Pier 6
Pier 7
Pier 8
Pier 7
Pier 6
Pier 7
Pier 6
Pier 8
Pier 8
152.0 m
Abutment 9
jacking attachment
Abutment 9
Installation of Bridge Deck by Jacking
152.0 m
Fabricación de dovelas
Installation of Bridge Deck by Jacking
Completed Chiapas Bridge
Fabricación de dovelas
Thank you for your kind attention !
Takk for Oppmerksomheten !

Piled Foundation for the Chiapas Bridge in Mexico

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