Upload
briana-wilson
View
218
Download
2
Tags:
Embed Size (px)
Citation preview
Schematic Design
CCCC-FHDI
July, 2011
Port Sudan SPC Flyover Engineering
Let the world more smoothly
1. Project Overview
3. Existing Problems and Suggestions
2. Scheme Introduction
Outline
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
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
directio
n
Fishing port
direction
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 roadsRailway
yard
Warehouse
Clearing area
SPC building
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
1.Project overview – Improving idea
Existing traffic problemThe 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.
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
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
Item UnitStandard value
Design value
Highway classificationThird grade
Third grade
Design km/h 40 40
Pavement design loadHighway – I grade
Highway – I grade
Pavement cross slope % 1.5~2 2
Road width m 10 10
Road length m 1080
Horizo-ntal curve
Min. radius m 600 13000
Min. length m 70 114
Min. length of easement curve
m 35 35
Vertical curve
Min. radius of concavity vertical curve
m 700 1000
Min. radius of convexity vertical curve
m 700 1200
Max. longitudinal slow % 7 5
Min. slow length m 120 130
Min. length of vertical curve m 35 40
Pavement typeAsphalt concrete
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.
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
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)
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
directionDowntown direction
Green
area
directio
n
2.Scheme introduction – Scheme 1 (recent stage)
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)
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)
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
directionDowntown direction
Green
area
directio
n
2.Scheme introduction – Scheme 2(recent stage)
Relief road
Relief road
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
Relief road
2.Scheme introduction – Scheme 2 (forward stage)
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
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
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
directio
n
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)
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)
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)
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)
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)
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)
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)
Item Scheme 1 Scheme 2 Scheme 3 Scheme 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
Satisfy the intersection traffic requirements basically, sedan cars need circumvention
Engineering scale
900m total length,530m tunnel,ground road area is 15242 m2. forward ramp bridge deck area is 2590 m2
900m total length,420m viaduct with bridge deck area is 3780 m2
,
ground road area is 19474 m2. forward ramp bridge deck area is 1350m2
900m total length,530m tunnel,ground road area is 11178 m2, forward ramp bridge deck area is 2590 m2
900m total length,420m viaduct with bridge deck area is 3780 m2
,
ground road area is 13756 m2. forward ramp bridge deck area is 1350m2
Engineering cost
2 3 1 (highest) 4 (lowest)
Floor area 1 (most) 2 3 4 (least)
Construction technology
mature construction technology
mature construction technology
mature construction technology
mature construction technology
Influence to traffic during construction period
Less influence More influence Less influence More influence
2.Scheme introduction – Scheme comparison
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
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
THANKS
Let the world more smoothly
3.Existing problems and suggestions
South-north direction main
road
3.Existing problems and suggestions
Existing bridge
Main road to south
Main road to north
3.Existing problems and suggestions
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