Railway Projects
Railway Projects
Railway engineering surveying projects involve a range of surveying activities and techniques to support the planning, design, construction, and maintenance of railways. These projects play a crucial role in ensuring the safety, efficiency, and effectiveness of railway transportation systems.
Geotechnical surveys help assess soil and subsurface conditions along the railway corridor, identifying potential hazards and recommending appropriate engineering solutions.
Geotechnical surveys help assess soil and subsurface conditions along the railway corridor, identifying potential hazards and recommending appropriate engineering solutions.
> Final Location Survey
> Feasibility Study > Reconnaissance survey > Drone Videography > Mobile LiDAR and Drone LiDAR Survey > Detour, High Speed Rail Corridor, etc > Dedicated Fright Corridor |
The final location survey for railway doubling, detour, 3rd/4th lines, involves a comprehensive approach utilizing various surveying technologies and tools to ensure accurate and detailed data collection. Here is an outline of the steps involved in the surveying process:
- LiDAR Survey: LiDAR (Light Detection and Ranging) technology is used to obtain highly detailed and precise elevation data. A LiDAR survey is conducted using airborne or terrestrial LiDAR scanners to capture the topography of the project area, including the existing railway tracks, nearby terrain, and any relevant structures. The LiDAR instrument shall be mounted on the last bogie and scan the entire railway alignment.
- Drone Survey: Drones equipped with high-resolution cameras are deployed to capture aerial images of the project area. The drone survey provides a bird's-eye view of the site, which helps in assessing the terrain, obstacles, and potential alignment options for the railway tracks.
- DGPS (Differential Global Positioning System) Survey: DGPS is used to establish accurate horizontal and vertical control points across the project site. DGPS receivers provide precise positioning information, allowing for accurate georeferencing of the LiDAR data, drone imagery, and other surveying measurements.
- Total Station Survey: Total stations are used for detailed on-ground measurements, including angles and distances. They play a crucial role in collecting data for specific points of interest, such as alignment control points, property boundaries, and critical structures along the railway corridor.
- Auto Level Survey: Auto levels are utilized to determine the elevations of different points along the railway alignment. This data is essential for creating a longitudinal profile of the track and ensuring proper slope and drainage. Survey of Benchmark (GTS) shall be connected to site using auto level.
- Engineering Scale Plan Preparation: The survey data collected from LiDAR, drone, DGPS, total station, and auto level is processed using specialized software. Various engineering scale plans are prepared based on this data, including: a. Index Map: An overview map showing the entire project area, highlighting key features and alignment options. b. Index Plan: A more detailed plan showing the alignment of existing and proposed railway tracks, along with major structures and features. c. Working Section: Longitudinal and Cross-sectional views of the railway alignment, illustrating the cut and fill details, embankments, and other features. d. Working Plan: Detailed horizontal plans of the railway track alignment, including curves, turnouts, and other design elements. e. Yard Map: Detailed plans of railway yards, including track layouts, sidings, and facilities. f. Detailed Project Report: A comprehensive report summarizing the survey findings, engineering design, environmental considerations, and cost estimates for the project.
- Geotechnical Surveys: Geotechnical surveys help assess soil and subsurface conditions along the railway corridor, identifying potential hazards and recommending appropriate engineering solutions.