Engineering surveys and construction of new lines
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The document discusses the process of constructing new railway lines, including preliminary investigations such as traffic and reconnaissance surveys, final location surveys, and modern surveying techniques. It also describes the construction steps such as land acquisition, earthworks, bridge building, track laying using different plate laying methods, and ballasting of tracks. The construction of each mile of new railway line requires 15 to 20 million rupees depending on the topography, construction standard, and other features of the area.
Engineering surveys and construction of new lines
- 1. PRESENTERS RAHMAT ALI SU/10-001-074081 NASIRUDDIN SU/10-001-074075 NUMAN NAZIR SU/10-001-074122 SARHAD UNIVERSITY OF SCIENCE & INFORMATION TECHNOLOGY PESHAWAR DATE: 22 Dec,2012
- 2. INTRODUCTION The construction of a new railway is a huge project and each mile required Rs.15 to 20 million depending upon: The topography of area Standard of construction And some other features
- 3. Why we construct a new railway lines? The need of constructing new railway line arises because of one or more consideration such as: Political reason. Development of backward areas. To connect new trade centers. To shorten the existing rail link etc.
- 4. Preliminary investigations for a new railway line Traffic survey: It includes detail study of traffic condition: Possible traffic the railway line carry. Standard of railway line. Promising traffic the railway line will carry.
- 5. Preliminary investigations for a new railway line Reconnaissance survey: This survey consists of a rapid and rough investigation of the area by using equipments of survey: Such as Prismatic compass Binocular pedometer Geodimeter for measurement upto 80 km distance during day and night Use of laser etc Distance upto 70 km can be measured using laser.
- 6. Preliminary investigations for a new railway line Preliminary survey: This survey consists of a detailed instrumental examination of the route to be selected in order to estimate the cost of the proposed railway line By using: Total station Tachometer Dumpy level etc.
- 7. Final location survey Once a decision has been taken for a particular railway line to be constructed a final location survey is done Instruments used are the same as in the case of preliminary survey Alignment is fully staked. More detailed project report is prepared. All working drawings are prepared.
- 8. Modern surveying techniques It includes: Satellite imagery Aerial photographs Contour maps Digital modeling. Photogrammetric modeling sheets
- 9. CONSTRUCTION OF NEW RAILWAY LINES Once the survey completed then construction works begin It includes Land acquisition Earthwork and bridges Station building, staff quarters Ballasting of tracks
- 10. CONSTRUCTION OF NEW RAILWAY LINES Land acquisition: It includes: Width of formation. Side slopes. Width of berms. Borrow pits.
- 11. CONSTRUCTION OF NEW RAILWAY LINES Earth work for formation: The height of earth work depends on the high flood level. Mechanically compaction is done generally by sheep foot roller.
- 12. CONSTRUCTION OF NEW RAILWAY LINES Bridges construction: Bridges increased the cost of the railway project. Bridges may be: Reinforced cement slab bridges. Steel bridges etc.
- 13. CONSTRUCTION OF NEW RAILWAY LINES Track laying: Once the formation is ready then just track laying are required. It consists: Laying of ballast Laying of sleepers and rails Fastenings
- 14. PLATE LAYING METHODS 1) Tram line method: A temporary line laid by the side of proposed track. Modification of this method is the side method. Side method are applicable when the service road is parallel to the track
- 15. PLATE LAYING METHODS 2) American method: Rails and sleepers are first assembled and then taken to the site. At site track panels are then unloaded either manually or with the help of cranes For concrete sleepers generally cranes are used.