The government of the SOCIALIST REPUBLIC OF VIETNAM HO CHI MINH CITY PEOPLE S S COMMITTEE TUNNEL JAPAN. Official Development Assistance

Transcription

1 0 The government of the SOCIALIST REPUBLIC OF VIETNAM HO CHI MINH CITY PEOPLE S S COMMITTEE TUNNEL JAPAN Official Development Assistance

2 1 TUNNEL Sub-Sector (Civil) IMAGE OF TUNNEL ENTRANCE

3 2 Traffic in Tunnel (Immersed Section)

4 3 PROFILE OF THE TUNNEL

5 4 FLOW CHART OF BASIC DESIGN FOR IMMERSED TUNNEL What are the Concept? Sound Structure Functional Structure Aesthetic Structure Structural Safety Useful for traffic Safety for Emergency Ventilation and Lighting Landscape of Tunnel Entrance View of Inner Space Which is Better? Tunnel Cross Section How to Construct? RC Type Unit at Casting Basin Hybrid type Unit with Floating Fabrication Where is the most likely? Just on the Alignment Other than Site

6 COMPARISON OF IMMERESED TUNNEL CROSS SECTIONS ITEM BASIC PLAN ALTERNATIVE PLAN Cross Section 9050 DRIVEWAY EMERGENCY WAY INSPECTION WAY DRIVEWAY INSPECTION WAY EMERGENCY WAY 9050 TUNNEL FACILITY INSPECTION WAY DRIVEWAY DRIVEWAY EMERGENCY TUNNEL FACILITY 500 WAY INSPECTION WAY 4700 Characteristics of Cross Section Traffic Safety Serviceability in an Emergency and Maintenance Construction Cost of Immersed Tunnel Others Total Evaluation 2m wide Emergency pathway is provided on the both sides. Vehicles ducts width is 12.25m. The vehicle duct width is enough for motorcycles. * Good. Serviceability in the traffic accident, fire accident and maintenance work is good for emergency pass-way duct are on the both sides and enough width MUS$ (include casting basin) 100%. This cross section was agreed by the Prime Minister of Vietnam in 5 July, Serviceability of emergency pass-way is higher than Alternative. This cross section was agreed by the Prime Minister. * Good. * Good. * Good. 2m wide Emergency pathway is provided on the center of cross section. Same as the left. Same as the left. * Good. Serviceability is inferior to the Basic Plan for walking pass is narrow long and complicated MU$ (include casting basin) 97% Alternative is inferior to the Basic Plan. * Good. * Good.

7 6 STRUCTURE TYPES OF IMMERSED TUNNEL TYPE-1: Reinfored Concrete Structure Construction at a Casting Basin TYPE-3: Steel-Concrete Composite Structure (Open Sandwich) Construction at a DRY DOCK OR FLOATING CONDITION RC Member RC Member Open Sandwiich Member Skin Plate as a From & Water Proof Main Reinforcement Bar Main Reinforcement Bar Normal Concrete Stirrup Stiffner Stirrup Normal Concrete Steel Plate Fabricate Full Steel Shell at the Dock or the Works Steel Shell can be towed as build Casting Concrete in the Dock or Casting Basin TYPE-2: Reinfored Concrete Structure With Steel Shell Casting Concrete at DRY DOCK YARD TYPE-4: Steel-Concrete Composite Structure (Full Sandwich) Casting Concrete at a DRY DOCK or Floating Condition RC Member Full Sandwich Member Skin Plate as a From & Water Proof Skin Plate as a From & Water Proof Skin Plate Normal Concrete Main Reinforcement Bar Stirrup Shear Reinforcing Plate High Fluidy Concrete Steel Plate (t=10mm) Stiffner Fabricate Full Steel Shell AND PLACING CONCRETE at the Dock Filling High Fludity Concrete up to Double Steel Hull No Reinforced Bars Fabricate Full Steel Shell at the Dock Casting Concrete AT DRY DOCK OR FLOATING CONDITION

8 7 Comparison of Structure Type for Immersed Tunnel Structure Type Location for Fabrication of Steel Shell Location for Concrete Placing Kinds of Concrete and Placing Imported Materials Maitenance Type-1 Reinforced Concrete Type-2 Steel Shell Type-3 Open Sandwich Type-4 Full Sandwich Non-need Dry dock yard Same as the left Same as the left Casting Basin Dry Dock Same as the left Same as the left Normal concrete. No Problem Normal concrete. Difficult for Floating Condition Normal Concrete Same as the left Super plasticizer concrete Same as the left High concrete technology are needed. Good Fair Fair Fair Not much Much (steel) Same as the left Much (steel, cement) Simple. Need for Corrosion- Protect of Steel Plate Same as the left Not Good Same as the left Construction Period 38 months 36 months 36months 35 months Construction Cost US$74.0 M (100%) Good. US$81.4 M (110%) US$81.4 M (110%) Construction Cost (Floating) US$78.4 M (106%) US$84.87 M (120%) Total Evaluation Good. Construction cost is the lowest RC has many construction cases. Construction period is the shortest. Super plasticizer concrete needs high technology.

9 8 Placing Concrete at Dry Dock Placing Concrete on Water (Floating Condition

10 9 REINFORCED CONCRETE STRUCTURE CASTING BASIN Mobilization Time 2 months Cost SAIGON RIVER CONSTRUCTION SITE Trench Dredging Time 18 months Cost US$ 7.8 M (US$ 19/m³) Construction of Casting Basin 10 months IMMERSED TUNNEL UNIT Excavation 6 months Bedding Works 4 months US$ 16.0 M (US$ 35/m³) PRIMARY END SURVEY/ALIGNMENT TOWER SECONDARY END RIVERBED APPROX CASTING BASIN OR SHIP YARD Fabrication of Immersed Tunnel Units Subtotal 10 months Structure 6 months US$ 21.4 M (US$ 191/m³) US$ 37.4 M Immersion Navigation traffic control Measurement, Anchor, etc 2.5 months US$ 21.4 M Outfitting Outfitting US$ 3.0 M Back filling 6 months US$ 10.3 M (US$ 36/m³) Towing 3 months US$ 0.5 M Inner work US$ 2.3 M Subtotal US$ 66.1 M TOW BOAT Overhead (12%) US$ 7.9 M IMMERSED TUNNEL UNIT Total 38 months US$ 74.0 M TOW BOAT

11 10 CONSTRUCTION PROCEDURE 1. Fabrication of Immersed Tunnel Unit 2. Dredging of Trench at the Immersed Tunnel Construction Site 3. Towing TOW BOAT IMMERSED TUNNEL UNIT IMMERSED TUNNEL UNIT CASTING BASIN OR SHIP YARD TOW BOAT 4. Immersion 5. Foundation 6. Backfilling SURVEY/ALIGNMENT TOWER PRIMARY END SECONDARY END RIVERBED APPROX GENERAL BACK FILL 1 : 2 1 : 2 PROTECTIVE CONCRETE GENERAL BACK FILL 1 : APPROX EXISTING RIVER BED LEVEL 1 : 2 CAST IN PIPES SHEAR KEY TEMPORARY SUPPORT PAD SAND JETTED FOUNDATION LOCKING BACK FILL (GRADED GRAVEL KG/PIECE)

12 11 MAIN PROCESSES OF IMMERSED TUNNEL CONSTRUCTION 1. Fabrication of Tunnel Element at Casting Position 2. Towing Element from Casting Basin 3. Towing & Setting Correct Position 4. Immersion & Joining Elements

13 12 CONSTRUCTION PROCEDURE OF IMMERSED TUNNEL 1st YEAR 2nd YEAR 3rd YEAR ITEM ACTIVITY DESCRIPTION QUANTITY NO SIGN CONTRACT 2 START ON SITE DESIGN MOBILISATION IMMERSED TUNNEL CONSTRUCT CASTING BASIN CONSTRUCT TUNNEL UNITS FITTING OUT TOWING & IMMERSION BACK FILL 4-UNITS 370M 4-UNITS 4-UNITS TRENCH DREDGING 6 THU THIEM SIDE APPROACH CUT AND COVER TUNNEL PREPARATION OF GROUND 340M (610M) VENTILATION TOWER U- SHAPE RETAINING WALL RETAINING WALL 200M 70M 7 HO-CHI-MINH SIDE APPROACH CUT AND COVER TUNNEL VENTILATION TOWER U- SHAPE RETAINING WALL RETAINING WALL 320M 220M 40M 8 PAVEMENT 9 INTERNAL WORKS E & M

14 13 CONSTRUCTION OF DIAPHRAM WALL

15 14 TRAFFIC MANAGEMENT

16 15 TUNNEL Sub-Sector (E and M) IMAGE OF TUNNEL E and M (CUT & COVER TUNNEL) CCTV CAMERA OPTICAL FIBER FOR FIRE DETECTION VI METER RE-TRANSMITTAL RADIO BROADCAST FACILITY (LEAD LINE) JET FAN TUNNEL LIGHTING (Hf FLUORESCENT LAMP AND HIGH PRESSURE SODIM VAPUOR LAMP) CABLE RACK MOBILE WIRELESS TELEPHONE FACILITY (LCX CABLE) LIGHTING (ESCAPE PASSAGE) EMERGENCY TELEPHONE EMERGENCY EXIT SIGN DRAIN TUBE WATER SUPPLY TUBE FOAM FIRE PLUG & FIRE EXTINGUISHER EMERGENCY EXIT EMERGENCY TELEPHONE CO METER

17 16 Facilities of tunnel E & M Electrostatic Precipitator VI Sensor Emergency Telephone Emergency Exit Sign Silencer (Sound Attenuator) CCTV Camera Foam Fire Plug and fire extinguisher

18 17 Tunnel E and M 1. Ventilation System: Jet Fan Electrostatic Precipitator Exhaust Fan Sound Attenuator Ventilation Control System 2. Lighting System: 3. Safety System: Emergency Pathway Radio Broadcasting Emergency Telephone Alarm Button Fire Detector Exit Guide Fire Extinguisher Laud Speaker 4. Drainage system: Pump at Emergency Pathway Pump at Ventilation Room 5. Power Supply system Public Power Supply Stand-by Generator 6. Surveillance and Control system

19 18 Exhaust Tower Sound Absorber (Silencer) Exhaust Fans Jet Jet fans fans Electrostatic Pecipitator (Dust Collector) Polluted Air Corner Vane Image Image of of ventilation ventilation System System

20 19 Outline of Ventilation System Tower Thu Thiem Side Mechanical Room Ho Chi Minh City Side Sound Absorber Corner Vane Exhaust Fans (Ventilators) Corner Vane Cranes Electric Room Jet Fan Electric Dust Collectors (Electrostatic Recipitator Louver Air Flow Traffic Flow

21 20 Location of Ventilation Tower and Building (West) Tunnel Entrance Ventilations Tower and Building Mon Bridge

22 21 DRAINAGE SYSTEM OF TUNNEL VENTILATING STATION VENTILATING STATION GL INLET PIPE DRAIN PUMP IN VENTILATION STATION DRAIN OUT EMEGENCY CORRIDOR A PRESSURE GAUSE X3 EMERGENCY CORRIDOR DRAIN TANK DRAIN-PUMP X3 DRAIN-PUMP X1 DRAIN-PUMP 3 SET

23 22 WATER SUPPLY SYSTEM FOR FIRE HYDRANT HYDRANT EMERGENCY TELEPHONE REGULATING VALVE (200m PITCH) WATER SUPPLY TAP SAFETY VALVE AIR VALVE EMEGENCY TELEPHONE (100m PITCH) FIRE-EXITINGUISHER 500m Ditch WATER SUPPLY TAP A CHANGE VALVE V-STRAINER FLUX METER SAFETY VALUE AUTOMATIC AIR EXIT VALUE HYDRANT PUMP WATER TANK (CAPACITY 60m3) HYDRANT PUMP ROOM CUT OFF VALVE POLE VALVE

24 23 SCHEMATIC DRAWING OF TUNNEL CONTROL AND SUPERVISION SYSTEM Control Room CCTV Monitor CCTV Monitor CCTV Monitor Emergency Telephone Terminal CCTV Broadcasting Loudspeaker Panel CRT CRT CRT Graphic Panel Rcording Device Local Transmittance Unit East Ventiration Tower Emergency Telephone Switching System Radio & Loudspeaker Broadcasting System CCTV Control Unit CRT Controler Transmittance Unit I/O CPU Device Controler Transmittance Unit Transmission Line Trafic Information Processing Unit Transmission Line West Ventiration Tower Tunnel Local Transmittance Unit Emergency Telephone Lead Line (Radio Antenna) Loud Speaker CCTV Camera CCTV Camera CCTV Camera Tunnel Information Panel Ventilation Control Unit Trafic Detecting Unit Switch-board Switch-board VI detectors CO detectors Jet Fans Loop detectors (Vehicle detectors)

25 24 Tunnel Control Room at Maintenance Office (Surveillance and Control system)