Mr. jose solorza haramain high speed railway phase 2

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Mr. jose solorza haramain high speed railway phase 2

  1. 1. Haramain High Speed Railway Phase 2 The superstructure: Main problems, typical sections; logistic of track material supply
  2. 2. ingeniería y consultoría de transporte transport engineering and consultancy Main problems • THE SAND is the most important problem related with the track along the high-speed line between Mecca and Medina: • Sandstorms and sand in suspension. • Advance of the dunes. • TEMPERATURE On the other hand, high temperatures do not present a problem, not cause large temperature contrasts between summer and winter and between day-night, although the mean ambient temperature is high. 2
  3. 3. ingeniería y consultoría de transporte transport engineering and consultancy Consequences of sand presence • Can cover the route. • Cause grind down and erosion of the elements (electrification, communications and signaling, ...) • Contamination of the ballast (loss of mechanical properties, decrease drainage, deterioration of sleepers, rail, ...) 3
  4. 4. ingeniería y consultoría de transporte transport engineering and consultancy Solving the problem of sand Preventive measures: avoid the sand reach the ballast Corrective measures: maintenance Active measures and design: proper track superstructure (slab track) Objective: To reduce maintenance Developing a plan of action and protection: studies of type of disease , quantification and section. 4
  5. 5. ingeniería y consultoría de transporte transport engineering and consultancy Preventive measures The design of preventive measures should be considered on sands to the maintenance plan (frequency of cleaning the sand accumulated). - Optimization of the layout, as far as possible, seeking to reduce the risks (design of horizontal and vertical alignment, depth and profile of the ballast). - Mitigation techniques and prevention of possible movement of sand on the track: using vegetation belts as a possible solution, surface treatments, running ditches and placement of barriers or walls and fences. - Design of track to prevent entry of sand (slab track systems, application of ballast protection with foam or blankets , elevated sleepers ...). The optimization of the route has a high efficiency and low maintenance, but requires projecting above the implementation of the infrastructure. Any action taken subsequently to the execution of infrastructure is a high cost of implementation. Some mitigation techniques are equally highly effective, but at greater costs of implementation and maintenance. The different designs of track involving the replacement of the ballast have expensive installation, but minor maintenance, and there is not enough experience. 5
  6. 6. ingeniería y consultoría de transporte transport engineering and consultancy Preventive measures Preventive measures Superficial treatments (gravel) Vegetation Superficial treatments (chemical) Protection barriers 6
  7. 7. ingeniería y consultoría de transporte transport engineering and consultancy Preventive Measures Preventive Measures Slab track system, with seat elevated rail 7
  8. 8. ingeniería y consultoría de transporte transport engineering and consultancy Embankment section in sand areas Embankment section in sand areas As techniques for mitigation or prevention of movement of sand in desert areas, the most widely tested and effective are those based on creating belts of vegetation to protect the track and fencing and barriers holding. Although the installation has a cost, this is not very high, offering a good performance. A part of the solutions that can be taken to protect the track of the sand carried by wind and its related problems,could be very positive to leave a buffer strip on both sides (at least downwind) of the track where the majority of the sand is stocked. However, any option or technique requires regular maintenance to remain effective. 8
  9. 9. ingeniería y consultoría de transporte transport engineering and consultancy Embankment section in sand areas Embankment section in sand areas There are some proposed solutions to problem areas of high-speed route between Mecca and Media in Saudi Arabia, under infrastructure implementation phase. Ditch design and Draa design variants 9
  10. 10. ingeniería y consultoría de transporte transport engineering and consultancy Typical track cross-section Typical track cross-section Ballast track cross-section 10
  11. 11. ingeniería y consultoría de transporte transport engineering and consultancy Typical track cross-section Typical track cross-section Ballast track cross-section 11
  12. 12. ingeniería y consultoría de transporte transport engineering and consultancy Typical track cross-section Typical track cross-section Ballast track cross-section 12
  13. 13. ingeniería y consultoría de transporte transport engineering and consultancy Typical track cross-section Typical track cross-section Ballast track cross-section 13
  14. 14. ingeniería y consultoría de transporte transport engineering and consultancy Typical track cross-section Typical track cross-section Slab track In principle and according to the bid submitted to the administration Arabia, the 449 km of the Haramain High Speed Railway, provides for the execution, it is foreseen slab track sections limited to location with enough embankment height (maximum 2.5m) and provided they meet the quality requirements to ensure conditions required and ensure suitable mounting conditions, so as to eliminate any impacts on the subsequent maintenance phase of the line.It is also expected track system with embedded rail along the stations. Currently there are no rules or formulas that define the methodology for the implementation of slab track. Therefore, every possible location, according to the above criteria, must be a studied based on each of the existing conditions and the slab track system to be used, due to the significant risk posed by a possible failure infrastructure and the effects it may cause on the slab track superstructure, and therefore on the operation of the railway line. Another consideration that is made is the convenience to introduce slab track precisely in those sections of track with problems with the sand, but the first premise must meet high embankment. 14
  15. 15. ingeniería y consultoría de transporte transport engineering and consultancy Typical track cross-section Typical track cross-section Slab Track Cross Section Slab Track System RHEDA 2000® Proposed variant RHEDA 2000® for desert areas Measures against rail blockade Elevated rail seat 15
  16. 16. ingeniería y consultoría de transporte transport engineering and consultancy Typical track cross-section Typical track cross-section Slab Track Cross Section Slab Track VPA Type 16
  17. 17. ingeniería y consultoría de transporte transport engineering and consultancy Supply logistics Supply logistics It provides for the construction of 5 mounting bases all along the line, in order to meet the supply needs of all road materials. In general, the fundamental condition for the location of the bases is the availability of proper road links, as all the internal logistics is based on road transport. Much of the supply of materials from abroad will be made by sea to the port of Jeddah. 17
  18. 18. ingeniería y consultoría de transporte transport engineering and consultancy Supply logistics Supply logistics - The path is assembled from rail sections of at least 25 m in length, which are delivered by ship to the harbor, from where are distributed to the bases by road. - Once on base, rails are gathered waiting for to be supplied to work sites. 18
  19. 19. ingeniería y consultoría de transporte transport engineering and consultancy Supply logistics Supply logistics - The sleepers are manufactured in 2 new plants to be installed in Saudi Arabia, both equipped with fast connections to highways between Mecca -Jeddah-Medina. - The approximate number of sleepers for the line is around 1,525,000 units.Also be manufactured in both plants sleepers for switches and crossings. - The cement will come primarily from the cement Rabigh and if necessary of the existing Yanbu. - There will be stocks of sleepers in both factories to ensure sufficient supply to the trace at the right time, carried by road in trucks. 19
  20. 20. ingeniería y consultoría de transporte transport engineering and consultancy Supply logistics Supply logistics - In relation to the ballast will result in various quarries located along the trace and near it.The volume of ballast provided is approximately 3,700,000 tons. - Stockpiles will be located along the trace, transported by truck from the quarry. 20
  21. 21. ingeniería y consultoría de transporte transport engineering and consultancy Supply logistics Supply logistics - The ballast is distributed along the trace from such stockpiles also by road or by rail in hopper cars - Positioned the sleepers and ballast the next step is the track assembly task: positioning of the rail and assembly, welding, track successive lift with corresponding risks of ballast, and subsequent release of tension leveling of track 21

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