1. Schematic Design CCCC-FHDI July, 2011 Port Sudan SPC Flyover Engineering Let the world more smoothly

2. 1. Project Overview 3. Existing Problems and Suggestions 2. Scheme Introduction Outline

3. 1.Project overview – construction background The project is located in a heavy traffic area near the green area of Port Sudan. After the green area constructed, the freight volume have greatly increased, which bring higher request to the existing port highway traffic capacity. Therefore a transport junction is proposed for improving the port highway capacity Green area Fishing port of Port Sudan Main road to north Main road to south

4. 1.Project overview – Geographic location The project site is adjacent to the dispatching center of Port Sudan railway freight station and SPC Port Sudan headquarters building, 1km from fishing port, 2km from berth 1-4 of green area, and 6.5km from downtown bus station. Downtown direction Green area direction Fishing port direction

5. 1.Project overview – Existing roads There are 3 roads in project site form a five road intersection, also, there are some railroads pass the project site, two railroads are usually used, others are rarely used. Around the project site there are railway yard, clearing area, warehouse, and SPC building. Existing roads Railway yard Warehouse Clearing area SPC building

6. The existing roads are 10m wide, without isolation strip. On both sides of the road are sundry warehouse and oil tank area Existing roads Project site 1.Project overview – Geographic location

7. 1.Project overview – Improving idea Existing traffic problem The existing intersection is the main traffic junction connect the port, with the increasing of the port cargo- handling capacity and development of logistics industry, the traffic volume is increasing rapidly. More and more large transport vehicles and sedan cars run interference which make the traffic become confusion and congestion. And also, multiterm railroads intersect the existing road, which greatly disturb the traffic vehicle running. 工程所在地 let the sedan cars run in all directions, trucks can only run along the red arrows road. In future, trucks can run along the purple arrow direction, through ramp bridge going into port area. Improving idea Project site

8. 1.Project overview – Main technical standard Highway classification ： Third grade Design speed ： Mainline:40km/h; Ramp:25km/h Road width ： 10m (dual 2 lanes) Pavement service life ： 20 years Bridge design load ： Highway-I grade Highway clearance ： 5.0m Railroad clearance ： 5.5m ItemUnit Standard value Design value Highway classification Third grade Designkm/h40 Pavement design load Highway – I grade Pavement cross slope%1.5~22 Road widthm10 Road lengthm1080 Horizo- ntal curve Min. radiusm60013000 Min. lengthm70114 Min. length of easement curve m35 Vertical curve Min. radius of concavity vertical curve m7001000 Min. radius of convexity vertical curve m7001200 Max. longitudinal slow%75 Min. slow lengthm120130 Min. length of vertical curvem3540 Pavement type Asphalt concrete

9. 2.Scheme introduction - Design idea According to the characteristics of the intersection, we consider two design ideas. The first one is to maintain the existing five road intersection unchanged, recently through the mainline tunnel or viaduct to ensure the traffic smooth, forward increase left turn ramp bridge to separate trucks from ground ring intersection.

10. The second design idea is using the north section of south-north direction main line as a special channel to trucks, sedan cars should run through road C connecting to the main line. Based on the two design idea, tunnel and viaduct are compared respectively in the scheme, so, form four scheme, and every scheme involves recent and forward stage scheme. Sedan cars runaround way Forward trucks special lane Recent trucks special lane 2.Scheme introduction - Design idea

11. Recent stage scheme set two layers, first layer is the south- north direction tunnel under ground in connection with road A and road E 2.Scheme introduction – Scheme 1 (recent stage)

12. Second layer is the relief roads above two sides of the tunnel, after intersecting with the railroad, going through the roundabout into road A,B,C,G. Fishing port direction Downtown direction Green area direction 2.Scheme introduction – Scheme 1 (recent stage)

13. In forward stage, a left turn ramp bridge D will be constructed to link road E’s west side relief road and road G, also a right turn ground ramp F will be constructed to link road E’s east side relief road and road G, achieve split- flow traffic. Ramp bridge D Ground ramp F 2.Scheme introduction – Scheme 1 (forward stage)

14. Recent stage Scheme 2 set a mainline viaduct above ground connect road A and road E, furthermore, reserve interface with forward left turn ramp bridge D Relief road Mainline viaduct Relief road Reserved interface 2.Scheme introduction – Scheme 2(recent stage)

15. The ground lay is a five roads intersection, the relief roads under two sides of the viaduct, after intersecting with the railroad, going through the roundabout into road A,B,C,G. Fishing port direction Downtown direction Green area direction 2.Scheme introduction – Scheme 2(recent stage) Relief road

16. In forward stage, a left turn ramp bridge D will be constructed to link road E’s west side relief road and road G. Furthermore, we will control the traffic flow direction on the mainline viaduct to stop the northward direction vehicles running onto the viaduct. So vehicles can enter the port area by mainline viaduct, ramp bridge D and ground roads, but leave the port area only by ground roads and ramp bridge D. Ramp bridge D Relief road 2.Scheme introduction – Scheme 2 (forward stage)

17. Scheme 3 is similar to scheme 1, the first layer is the mainline tunnel under ground in connection with road A and road E. 2.Scheme introduction – Scheme 3(recent stage) Mainline tunnel

18. There are no relief roads but only mainline tunnel about road E, so it became a truck special straight-going lane for entering port area. Sedan cars need to go by a runaround way. Sedan cars runaround way Trucks special lane 2.Scheme introduction – Scheme 3(recent stage) Mainline tunnel

19. The second layer is differently, there is no relief road beside the tunnel, so the intersection is a four roads intersection, the traffic flow can be controlled easier by using traffic signal lamps. 2.Scheme introduction – Scheme 3(recent stage) Downtown direction Fishing port direction Green area direction

20. The third layer in forward stage is the same with scheme1, a left turn ramp bridge D will be constructed to link road E’s west side relief road and road G, also a right turn ground ramp F will be constructed to link road E’s east side relief road and road G, achieve split-flow traffic. Ramp bridge D Ground ramp F 2.Scheme introduction – Scheme 3 (forward stage)

21. Only mainline viaduct is design as road E, with no relief roads under bridge, so it become a straight direction trucks special lane. Sedan cars need to circumvent by runaround way(blue arrows). Sedan cars runaround way Trucks special lane(viaduct) 2.Scheme introduction – Scheme 4(recent stage)

22. Mainline viaduct above ground connects road A and road E, furthermore, reserves interface with forward left turn ramp bridge D. Mainline viaduct Reserved interface Cancel relief road Relief road There are no relief roads under the viaduct, so the intersection is a four roads intersection, traffic flow can be controlled easier by using traffic signal lamps. 2.Scheme introduction – Scheme 4(recent stage)

23. In forward stage, a left turn ramp bridge D will be constructed to link road E’s west side relief road and road G. Furthermore, we will control the traffic flow direction on the mainline viaduct to stop the northward direction vehicles running onto the viaduct. So vehicles can enter the port area by mainline viaduct, ramp bridge D and ground roads, but leave the port area only by ground roads and ramp bridge D. Ramp bridge D Relief road 2.Scheme introduction – Scheme 4 (forward stage)

24. The total length of mainline tunnel is 530m, containing open section and closed section. The open sections are at the two ends, each of which is 110m long. The closed part is a single box with one cell, 310m long in the middle. The standard part is 9.6m wide, and 5m high. 2.Scheme introduction – Structure (mainline tunnel)

25. Forward left turn ramp bridge D is prestressed concrete continuous box girder structure. Bridge width of scheme 1 and 3 is 7m wide, of scheme 2 and 4 is 9m wide. In standard section under box girder are single pillar pier, and crotch section use Y shape plate pier. Bridge abutments are bed plate abutments and the foundations are bored piles foundations. 2.Scheme introduction – Structure (ramp bridge)

26. The main line viaduct is 420m long and 9m wide, the superstructure is prestressed concrete continuous box girder. In standard section under box girder are single pillar pier, and crotch section use Y shape plate pier. Bridge abutments are bed plate abutment and the foundation is bored piles foundation. 2.Scheme introduction – Structure (mainline viaduct)

27. ItemScheme 1Scheme 2Scheme 3Scheme 4 Transportation capacity Satisfy the intersection traffic requirements preferably Satisfy the intersection traffic requirements very well Satisfy the intersection traffic requirements basically, sedan cars need circumvention Engineering scale 900m total length, 530m tunnel, ground road area is 15242 m 2. forward ramp bridge deck area is 2590 m 2 900m total length, 420m viaduct with bridge deck area is 3780 m 2, ground road area is 19474 m2. forward ramp bridge deck area is 1350m 2 900m total length, 530m tunnel, ground road area is 11178 m 2, forward ramp bridge deck area is 2590 m 2 900m total length, 420m viaduct with bridge deck area is 3780 m 2, ground road area is 13756 m 2. forward ramp bridge deck area is 1350m 2 Engineering cost 231 (highest)4 (lowest) Floor area1 (most)234 (least) Construction technology mature construction technology Influence to traffic during construction period Less influenceMore influenceLess influenceMore influence 2.Scheme introduction – Scheme comparison

28. By the comprehensive comparing of four schemes as shown in above sheet, we recommend adopting scheme 4. Ramp bridge D Relief road Mainline viaduct Ground road 2.Scheme introduction – Recommended scheme

29. 3. After the project completion, northward traffic condition will be greatly improved, but vehicles to south area have to circumvent for a long distance, or run along road C connecting to the existing bridge, go into south area. Along with the traffic volume increasing, traffic pressure of the bridge and intersections near it will become more and more huge. So we suggest increasing westward artery in future, reconstructing road B, building a new over bay bridge connecting to the downtown, which will greatly improve the traffic environment of the whole road network. 1. With no geological information, pile diameter and pile length are all design by experience, so we suggest the owner to ascertain the geologic condition of project site especially the viaduct location, so as to deepen the design. 2. Road broaden engineering may need to adjust the railway line or influence the railway normal operating, so we suggest that coordinating work with relevant government department should be done firstly to determine the final design scheme. If the railway can be abolished, the bridge length will be more shorter, and the construction cost will be more cheaper. 4.The existing intersection is the main exit way of port area, so the traffic will be greatly influence during the project construction period. We suggest that temporary road traffic organization should be done before the project construction, make sure the normal operating traffic during the construction period. 3.Existing problems and suggestions

30. THANKS Let the world more smoothly

31. 3.Existing problems and suggestions

32. South-north direction main road 3.Existing problems and suggestions

33. Existing bridge Main road to south Main road to north 3.Existing problems and suggestions

34. Existing bridge South-north main road New bridge Road B New road Recent main traffic direction Forward main traffic direction Fishing port Green area 3.Existing problems and suggestions