A connection icon: Cao Lanh bridge. Mr. Phan Duy Lai Deputy General Manager Cuu Long CIPM

Transcription

1 1

2 2

3 A connection icon: Cao Lanh bridge Mr. Phan Duy Lai Deputy General Manager Cuu Long CIPM

4 THE ICONIC CONNECTION PROJECT: CAO LANH BRIDGE 4

5 CONTENT 1. INTRODUCTION 2. PREPARATION OF THE PROJECT THE FIRST ACTION 3. INTRODUCTION OF CAO LANH BRIDGE PROJECT 4. VOLUME OF CONCRETE FOR MAIN BRIDGE 5. MIX DESIGN AND CONSTRUCTION WORK 6. QUALITY MANAGEMENT WORK 7. DIFFICULITIES AND SOLUTION 8. LESSON LEARNED 5

6 1. INTRODUCTION OF THE CONNECTIVITY PROJECT Vietnam s Map 6

7 1. INTRODUCTION OF THE CONNECTIVITY PROJECT Mekong river map 7

8 1. INTRODUCTION THE CONNECTIVITY PROJECT Project map - Cao Lanh bridge, the connect route between Cao Lanh-Vam Cong bridge and Vam cong bridge is a part of route on Ho Chi Minh route - According to the future planning of the route was used as a main vertical axis of the West of Viet. Nam, including 1A national highway in order to reduce traffic on 1A national highway - In addition, the route also links two horizonal axis are 80 national highway in Dong Thap and 91 national highway which is giving favorable traffic conditions for transportation from Kien Giang, An Giang to HCM city and the South East - The Cao Lanh bridge is over Tien river which is located in Cao Lanh town, Cao Lanh city and Lap Vo town, Dong Thap; near Cao Lanh ferry about 0.8km downstream and My Thuan bridge about 35km upstream - Cao Lanh bridge is the second-largest bridge (after Vam Cong bridge) in Central Mekong Delta Project Connectivity Project (CMDCP) 8

9 2. PREPARATION OF THE PROJECT The first action 2.1. Background: Under the approval of Government and the donors, these following components of the project will be developed in phase 1 of Central Mekong Delta Connectivity Project (CMDCP): The component project 1: Cao Lanh bridge and path (7.8km) DFAT 160 mio USD The component project 2: The connect route Cao Lanh Vam Cong (15.65km) ADB 410 mio USD The component project 3: Vam Cong Bridge (5,39km) EDCF 232 mio USD 9

10 2. PREPARATION OF THE PROJECT The first action 2.2. Current process of transportation projects: Prepare F/S and Department of Transportation for aprroval Calling for investments from Donors Sign the loan agrement Loan agreement is in effect Choose Consultant Project deployment

11 2. PREPARATION OF THE PROJECT The first action 2.3. Apply first action for Central Mekong Delta Conectivity Project Using Technical Assistance in stead of waiting for loan agreement was signed (MOU 30/09/2010); Choose Consultant before Technical Assistance is in effect (MOU 26/11/2010); ADB agreed to the Construction contractor choice before loan agreement is in effect (MOU 23/02/2012), specifically regard to Cao Lanh bridge: Advertising prequalified for Cao Lanh bridge (27/08/2012); Approved construction contractor choice plan (18/12/2012); ADB approves the result of construction contractor choice (4/9/2013); Department of Transportation approves the result of construction contractor plan (19/9/2013); Sign the contract (16/10/2013); Loan agreement is in effect (27/12/2013).

12 2. PREPARATION OF THE PROJECT The first action 2.4. Effectiveness and Challenges: Effectiveness: Reduce the project deployment time is almost 3 years, compares to current process Saving 1.2 mio USD of commitment fee Saving the interest in over 2 years Challenges: Need the approval of Prime Minister on the first action. For the project, the application of the first action has been included in the Technical Assistance, signed between ADB and the State Bank of Vietnam (SBV)

13 3. INTRODUCTION OF CAO LANH BRIDGE PROJECT Contract information Cao Lanh bridge construct contract information: Consultant & Constructing Supervisor: Wilbur Smith Associated (US) WSP Finland (Finland) Yooshin Engineering Corporation Joint Venture (South Korea); Construct contractor: Chinese Road and Bridge Corporation (China) and Vinacotex E&C (Viet Nam); The total value of construction contract: 145 mio USD (~ bio VND), from non-refundable funding of Australian Gorvernment and ADB s loan The bridge was expected to be completed after 1308 days (43 months) 13

14 3. INTRODUCTION OF CAO LANH BRIDGE PROJECT Technical information Total length of Cao Lanh bridge is 2,015m Approaching North & South bridge: super- T beam with prestreesed concrete, including 17 spans ( x )m = m. cable-stayed bridge, central span: 350m, edge span length is 150m, number of spans: ( )m=650m. It has H-shape towers 123.4m high. 14

15 3. INTRODUCTION OF CAO LANH BRIDGE PROJECT Technical information 4 lanes for traffic. maximum speed 80km/h. Scale crosssection bridge: motorised vehicles lane is 14.0m; nonmotorized vehicles lane is 6.0m; divider is 1.5m; rail is 1.0m; safety strip is 2.0m 15

16 4. VOLUME OF CONCRETE FOR MAIN BRIDGE VOLUME OF CONCRETE OF MAIN SECTIONS TABLE NO. SECTION GRADE OF CONCRETE MASS 1 BORED PILES (02 PIERS, 24X2=48, D2500) 35 MPa M³ 2 FOUNDATION OF PIERS (02) 40 MPa 8862 M³ 3 PIER 50 MPa 4432 M³ 4 CROSS-SECTION GIRDER OF MAIN BRIDGE 50 MPa M³ 16

17 4. VOLUME OF CONCRETE FOR MAIN BRIDGE Foundation piers construction: 17

18 4. VOLUME OF CONCRETE FOR MAIN BRIDGE 02 piers construction on the water: 18

19 4. VOLUME OF CONCRETE FOR MAIN BRIDGE Main bridge construction: 19

20 5. MIX DESIGN AND CONSTRUCTION WORK 5.1. Mix design and pouring concrete work: The mix design must follow ACI standard. The approved mix designs would be mixed at batching plant then using for the project. There are many grades: from C10 to C60. The contractor used 04 batching plants (90m3/h) and 03 batching plants (60m3/h) at site and some ready-mixed batching plant for concrete work. In addition, there are 12 pumps for pouring concrete. The method and process has be approved by Consultant. 20

21 5. MIX DESIGN AND CONSTRUCTION WORK The work must follow the specifications of the project Curing must be applied immediately after casting. The pouring of special sections must be continuous from start to end 21

22 5. MIX DESIGN AND CONSTRUCTION WORK Construct joints are only placed in the specified location. The expansion joints need safeguards when working to avoid rubbish and other materials. The joints is clearly showed in the drawing Pictures of batching plant and concrete working: 22

23 5. MIX DESIGN AND CONSTRUCTION WORK 23

24 6. QUALITY MANAGEMENT WORK (1) Documents: Company profile of the constructors and applicators BVTC design documents Documents of materials and resources Detailed process for structures Method statement Quality management record Safety and Health record Environment record These documents must be approved by Consultant, Investors before the working process (2) Works on jobsite: Control the site lab Control resource of materials 24

25 6. QUALITY MANAGEMENT WORK Control the quality of materials with frequency in the specifications Control the source of materials of vendors Control the quality of cement and concrete Inspect the quality of devices and equipments The labotory LAS71 has to be checked periodically The inspection of finished sections has to be complied with technical standards and the regulations of the law of Viet Nam 25

26 6. QUALITY MANAGEMENT WORK Based on the frequency testing which is approved in the quality management plan is as follows: 26

27 6. QUALITY MANAGEMENT WORK 27

28 6. QUALITY MANAGEMENT WORK Results of materials testing for concrete work: 28

29 6. QUALITY MANAGEMENT WORK Bored pile D1500 Approach bridge s foundation o 34 foundations o 02 statical load experiments o 32 PDA experiments o 34 experiments (01 test/pile) Bored pile D2500 Main bridge s foundation o 04 foundations o 04 statical load experiments (01 O-Cell test/foundation) o 01 PDA experiment Redoing experiments o The result is 5.59 MN (before pumping mortar), MN (after bumping mortar). Total load is MN > 44 MN. The result is passed for P18-22 pile 29

30 6. QUALITY MANAGEMENT WORK QUALITY ASSESSMENT Based on results of contrsruction packages. Consultants has been generally evaluated about the quality of sections of Cao Lanh project following directions of technique and qualified to put to use 30

31 7. DIFFICULITIES AND SOLUTION 7.1. Bad placing condition (weather, underwater, flood): When the important sections like bored pile (D2500) underwater started constructing in the rain season (Arcording to stastictic in 2014, the highest flood level in Mekong Delta could be reached within 15 years). This matter caused difficulty for placing on the river. Contructing would be delay during this season (4-6 months). The constructors must use more big side barges, 300T cranes from Singapore, using almost double the amount of steel for the structure. 31

32 7. DIFFICULITIES AND SOLUTION 7.2. Lack of materials: Lack of materials to product concrete: river sand with FM > 2.3 There is no natural sand that meet the requirement of FM > 2.3 in Mekong Delta. The previous projects must import sand from Cambodia. To ensure the source of sand for concrete production, constructors have to sieve and wash sand at mines. However, the mass of sand is still not enough, contractor and consultant have to mix crushed sand with natural sand. 32

33 7. DIFFICULITIES AND SOLUTION 7.3. Volume of mass concrete piles: Each bored pile has large concrete volume ( m 3 ) Limited placing area Required continuously supplied concrete Have to reduce the working time of concrete Many risks in concrete working (trucks, pumps) To ensure supplying concrete process is not interrupted, the contractor must use both 2 batching plants (90m3/h on barge) reduce the time of mixing from 20 hrs to hrs/bored pile 33

34 7. DIFFICULITIES AND SOLUTION 7.4. Production of form traveler: Previously, we always used sliding form, form traveler imported from foreigner. The form traveler (width 27.5m, weight 250 tons) is for the first time being designed and produced in Vietnam, operated successfully & safely. Requirement scaffolding load test before construction: To ensure the security of the whole scaffolding such as cross girder, sliding form, form traveler system, they are all tested on 150% load before mass construction. 34

35 7. DIFFICULITIES AND SOLUTION 7.5. High-tech requirements: According to technical manual, cable-stayed bridge s analysis of erection and control geometry has caused many difficulties to the constructor Constructor with experienced engineers and specialize software has been finished the analysis over 1 year. The result is the bridge which has small tolerances to ensure it works smoothly with 100-year life design. 35

36 8. LESSON LEARNED (12) (1) The first time using Kelly drilling machine for D2500, 120m depth in Viet Nam (2) Korden test is applied for all D2500 piles (3) O-cell experiments is applied for D2500 bored piles (4) The radiator using circulatory piles for mass concrete is applied to get rid of thermal craking. (5) Mono strand method with isotension equipment (exclusive of Freyssinet, France) reduced the working time from 3-4 days to 1 day on restressed steel 36

37 8. LESSON LEARNED (6) The establishment of steering committee including: investors (ADB, DFAT), department of transportation, local people committee, CIPM, Consultant, main and sub contractors has periodically meeting (3 months, 6 months) is strongly supported for the project. They help construction work is on schedule, quality compliance and safety. (7) The close guidance of the Government, ministries, central agencies and in close coordination with the leaders of the authorities and people in Dong Thap province. (8) Cuu Long Corporation (formerly My Thuan Project Management Unit) is the Project Owner together with Contractors, Supervision Consultants, officers, engineers, workers and laborers on the site. They work closely together to overcome many difficulties, work day and night to complete the project, connecting road to ensure safety, being on schedule, meet the quality requirements. 37

38 8. LESSON LEARNED (9) Must always have tight coordination between investors, constructors and consultants to achieved maximum efficiency (10) In coordination with The State Council for Acceptance Test of Construction Works as well as doing test independently during construction. It reduces inspection fee, avoid excavating finished layer if inspection work is done after construction. (11) Through this project, the management capacity, equipment, organization of Viet Nam has improved as well as raise the level, skills and master the technology. (12) It proves that Vietnamese companies have enough competency to complete projects like Cao Lanh bridge without foreigner support, is to save cost. 38

39 CAO LANH BRIDGE AND CONNECT ROUTES WHEN FINISHING 39

40 Signature Board of CAO LANH BRIDGE 40

41 OPENING CEREMONY OF CAO LANH BRIDGE 41

42 OPENING CEREMONY OF CAO LANH BRIDGE 42

43 THANK YOU