Home
Communities
Companies
- Companies
  
  Discover best places to work
- Compare Companies
  
  Compare & find best workplace
- Add Office Photos
  
  Bring your workplace to life
- Add Company Benefits
  
  Highlight your company's perks
Reviews
- Company reviews
  
  Read reviews for 6L+ companies
- Write a review
  
  Rate your former or current company
Salaries
- Browse salaries
  
  Discover salaries for 6L+ companies
- Salary calculator
  
  Calculate your take home salary
- Are you paid fairly?
  
  Check your market value
- Share your salary
  
  Help other jobseekers
- Gratuity calculator
  
  Check your gratuity amount
- HRA calculator
  
  Check how much of your HRA is tax-free
- Salary hike calculator
  
  Check your salary hike
Interviews
- Company interviews
  
  Read interviews for 40K+ companies
- Campus placements
  
  Interviews questions for 2K+ colleges
- Share interview questions
  
  Contribute your interview questions
Jobs
Awards

WINNERS AWAITED!
- ABECA 2025
  
  WINNERS AWAITED!
  
  AmbitionBox Employee Choice Awards - 4th Edition
- ABECA 2024
  
  AmbitionBox Employee Choice Awards - 3rd Edition
- AmbitionBox Best Places to Work 2022
  
  2nd Edition
- AmbitionBox Best Places to Work 2021
  
  1st Edition

For Employers

Add office photos

Employer? Claim Account for FREE

L&T Technology Services

Compare

3.3

based on 4.7k Reviews

511 L&T Technology Services Jobs

Surveyor

L&T Integrated Engineering Services

3.3

based on 4.7k Reviews

3-8 years

Kolkata

1 vacancy

Surveyor

L&T Technology Services

posted 11hr ago

Job Role Insights

Flexible timing

Key skills for the job

Engineering Design Construction Urban Planning BIM Modeler CCTV Monitoring Legal Compliance

+ 1 more

Job Description

1. Pre-Construction Surveying and Planning:

Site Analysis and Boundary Identification: Before construction begins, surveyors conduct initial site surveys to establish project boundaries, rights-of-way, and other critical reference points. This is necessary to ensure that the tunnel and station locations are legally defined and aligned with urban planning regulations.
Topographical Surveys: The surveyor conducts topographical surveys to map the existing surface conditions, including roads, buildings, utilities, and other structures. This is crucial for planning how the tunnel will intersect with surface infrastructure and identifying potential obstacles or challenges.
Geodetic Control Setup: They establish geodetic control points, which serve as the reference framework for all construction activities, ensuring that the tunnel, stations, and other elements are accurately positioned in relation to one another and the project site.

2. Tunnel Alignment and Positioning:

Tunnel Design Alignment: Surveyors are involved in verifying and marking the proposed alignment of the tunnel, ensuring that the design aligns with the planned trajectory. This requires careful calculations to account for elevation, horizontal alignment, and curvature based on the engineering design.
Monitoring Tunnel Progress: Throughout the construction phase, surveyors monitor the position of the tunnel boring machine (TBM) or other excavation methods, ensuring that the tunnel remains on the correct alignment. They use advanced equipment, such as laser scanning, total stations, and GPS, to track the TBMs progress and verify that the excavation matches the design specifications.
Cross-Section Measurements: Regular cross-sectional surveys are conducted to monitor the shape and size of the tunnel as it is being excavated. This helps ensure that the tunnel profile meets the design specifications, particularly in complex geological conditions.

3. Subsurface Utility and Obstruction Mapping:

Locating Existing Utilities: The surveyor is responsible for identifying and mapping existing underground utilities (e. g. , water pipes, gas lines, electricity cables) that could pose challenges during tunneling or excavation. They use ground-penetrating radar (GPR) and other methods to detect and record the location of utilities.
Collision Avoidance: The surveyor s role is critical in avoiding clashes between the proposed tunnel and existing infrastructure. By accurately mapping utilities and other subsurface obstacles, they help ensure that the construction process avoids costly and dangerous encounters with these elements.

4. Monitoring and Quality Control During Construction:

Monitoring Tunnel Stability: Surveyors use precision tools to monitor tunnel movements and settlements during construction, ensuring that ground movements and subsidence are within acceptable limits. This is particularly important in urban areas, where tunnel excavation could affect nearby buildings, roads, and other structures.
Surface and Underground Settlements: They conduct surveys to measure surface movements and settlements resulting from tunneling activities. If any unexpected shifts or subsidence are detected, surveyors can help engineers adjust construction techniques to mitigate damage.
Alignment and Elevation Control: Throughout the tunneling process, the surveyor ensures the tunnel s vertical and horizontal alignment is maintained. They regularly check the depth of excavation and the alignment of the tunnel, making corrections where necessary to maintain the correct path.

5. Setting Out and Marking for Construction:

Station and Tunnel Lining Marking: The surveyor is responsible for marking out the exact locations for tunnel linings, underground station structures, shafts, and other critical components of the metro system. This ensures that the construction team builds structures in the correct locations and according to the design.
Reference Points for Structural Work: They provide reference points for the construction of tunnel linings, station foundations, and other key structures. These points are essential for accurately positioning rebar, foundations, and other construction materials.

6. Post-Construction Surveying:

Final As-Built Surveys: After construction, surveyors conduct an as-built survey to document the final location, alignment, and elevation of the tunnel and stations. This serves as a record for the completed project and is essential for future maintenance or upgrades.
Verification of Construction: The as-built survey helps verify that the project was constructed according to the approved design. If deviations or discrepancies are found, adjustments or corrective measures can be planned for future phases or operations.

7. Use of Advanced Surveying Technology:

Total Stations and GPS: Surveyors use total stations, robotic instruments, and GPS to collect accurate data on the tunnel alignment, station positions, and surrounding terrain. These technologies allow for real-time, precise measurements, which are essential for maintaining the tunnels integrity and alignment.
Laser Scanning and 3D Modeling: Laser scanning and 3D modeling are used to create highly detailed, accurate representations of the construction environment. These tools help surveyors monitor the tunnels progress, verify alignment, and assess the construction site in greater detail.
Building Information Modeling (BIM): Surveyors may work with BIM tools to provide geospatial data for planning and construction. By integrating surveying data with BIM, they help ensure that the underground metro system aligns perfectly with the digital models created by engineers.

8. Coordination with Other Teams:

Collaboration with Engineers and Architects: Surveyors work closely with civil, structural, and geotechnical engineers to provide accurate location data and assist with design modifications based on site conditions.
Communication with Construction Teams: Surveyors also work alongside construction teams, providing precise layout markings for tunneling, excavation, and station construction. They ensure that workers are following the correct path and that any challenges encountered during the tunneling process are properly addressed.

9. Environmental and Legal Considerations:

Environmental Impact: Surveyors help ensure that construction follows environmental guidelines, particularly when it comes to preserving sensitive underground ecosystems, groundwater sources, or existing structures.
Legal Compliance: They ensure the construction is within legally designated boundaries, avoiding encroachments on protected or restricted areas, such as historical sites, parks, or private properties.

Employment Type: Full Time, Permanent

Read full job description

Prepare for Surveyor roles with real interview advice