+65 8979 7396

Prism Monitoring

  • Instruments
  • Prism Monitoring

Accurate Structural & Building Movement Monitoring by Pro-Tec Geosystems Pte Ltd

In Singapore’s dense construction environment, monitoring structural movement is essential for ensuring safety, detecting deformation, and maintaining compliance with regulatory requirements. At Pro-Tec Geosystems Pte Ltd, we provide Prism Monitoring Geotechnical Instrumentation & Monitoring services using high – precision L – Bar prisms and sticker prisms. Our Prism Monitoring in Singapore solutions deliver reliable, cost – effective structural displacement data – ideal for projects where real – time automated systems are not required.

Whether you require Optical Prism Monitoring, Total Station Prism Monitoring, Structural Prism Monitoring, or Building Movement Prism Monitoring, our team offers professional, compliant, and accurate manual monitoring services across all types of developments.

What is Prism Monitoring?

Prism Monitoring is a manual deformation measurement technique involving the installation of reflective prisms on building façades, retaining walls, ERSS structures,tunnels, and other engineering structures. Surveyors then use a total station to record the 3D coordinates (X, Y, Z) of each prism during scheduled monitoring intervals.
Changes in those coordinates indicate:
  • Horizontal movement
  • Vertical settlement or heave
  • Structural rotation or deformation
  • Progressive building displacement

This makes prism instrumentation one of the most widely used methods for Settlement & Movement Monitoring and Deformation Monitoring Singapore projects.

Types of Prism Instrumentation Used

Our monitoring solutions serve a wide range of construction and structural scenarios, including:

L - Bar Prism

A high-precision prism mounted on a rigid L-shaped bracket. Best for:

  • Long - term monitoring
  • Buildings near deep excavation
  • Structural Prism Monitoring with high accuracy
  • Monitoring of sensitive or critical assets

Sticker Prism

A smaller, lightweight prism sticker. Best for:

  • Locations with limited access
  • Short - term or low - impact monitoring
  • Budget - conscious projects
  • Temporary displacement tracking
These two prism types allow full flexibility depending on project risks, timeline, and consultant requirements.

Applications of Prism Monitoring

Our Prism Instrumentation and surveying services are essential for:
  • Buildings adjacent to excavation, piling, or tunnell ing works
  • ERSS, diaphragm walls, retaining structures
  • Heritage or conservation structures requiring non - invasive monitoring
  • MRT, LTA, PUB, and BCA - regulated infrastructure projects
  • Construction sites requiring periodic deformation measurement
  • Building Movement Prism monitoring during major construction
Prism Monitoring supports engineering decisions and ensures site safety by providing early detection of adverse movement

How Prism Monitoring Works

1. Prism Installation

Prisms are securely installed on structural elements such as walls, columns, slabs, or beams. Locations are selected based on risk zones, consultant instructions, and geotechnical requirements.

2. Total Station Surveying

Using Total Station Prism Monitoring methods, surveyors manually capture:
  • Prism coordinates
  • Horizontal displacement
  • Vertical settlement
  • 3D deformation trends
The use of high-grade total stations ensures repeatable and reliable results.

3. Data Comparison & Deformation Analysis

Recorded coordinates are compared with baseline readings to identify.
  • Horizontal movement (X, Y)
  • Vertical movement (Z)
  • Lateral shift of walls
  • Ground - structure interaction behaviour
This supports structural engineers in making informed decisions.

4. Reporting

Pro-Tec Geosystems provides weekly, monthly or custom monitoring reports that include:

  • Tabulated XYZ coordinates
  • Displacement from baseline
  • Trend graphs & displacement charts
  • Site plans with prism locations
  • Technical commentary & recommendations
Reports follow compliance requirements for LTA, BCA, PE-endorsed reports, and project consultants.

Why Choose Pro - Tec Geosystems for Prism Monitoring?

High Precision Instruments

We use industry-leading robotic and manual total stations for Optical Prism Monitoring, ensuring millimetre-level accuracy.

Experienced Surveyors

Our survey specialists are trained in Geotechnical Instrumentation & Monitoring, ensuring consistent and precise data collection.

Cost - Effective & Non - Intrusive

Manual prism surveys eliminate the need for power, loggers or wireless systems-making it highly economical and easy to deploy even in confined areas.

Full Compliance with Singapore Standards

We follow monitoring procedures aligned with:

  • BCA monitoring requirements
  • LTA Code of Practice
  • PE Consultant specifications
  • Industry - standard deformation monitoring guidelines

Flexible Frequency & Scheduling

Monitoring can be conducted:

  • Daily
  • Weekly
  • Monthly
  • Or event - based (e.g., before/after critical construction stages)

Complete Structural & Settlement Monitoring

Prism monitoring integrates perfectly with other geotechnical tools such as settlement markers, inclinometers, and piezometers.

Benefits of Prism Monitoring

  • Highly accurate structural movement detection
  • Early warning before significant damage occurs
  • Supports safe construction sequencing
  • Protects adjacent buildings and sensitive structures
  • Provides documentation for claims, disputes, and insurance
  • Complies with regulatory and consultant requirements
  • Ideal for both short - term and long - term monitoring needs

Trusted by Major Contractors & Consultants

Pro-Tec Geosystems has delivered Deformation Monitoring Singapore services across residential towers, MRT worksites, road & infrastructure projects, industrial facilities,and conservation buildings. Our data accuracy and reporting reliability make us a preferred partner among developers, PEs, and geotechnical consultants.
  • Why Choose Us

Why Choose Pro-Tec Geosystems

  • Experienced Field Technicians: Our team ensures accurate and consistent readings using calibrated dip meters.
  • Flexible Monitoring Options: Manual and automated monitoring options available based on project size and risk level.
  • Geotechnical Expertise: We understand how groundwater influences soil stability, excavation safety, and design assumptions.
  • Prompt Reporting: Fast turnaround for data processing and submission, ensuring no delays in project milestones.
  • Custom Deployment: Borehole depth, casing type, and monitoring intervals tailored to suit site-specific needs.

Trusted for Prism Monitoring

Our prism monitoring solutions are widely adopted for tunnelling, excavation, slope stability, and high-rise construction projects across Singapore. By integrating automated total station technology with real-time data capture, we provide precise and continuous measurements of structural movement.

Data-Driven
Accuracy

Safety &
Compliance

End-to-End
Support

Enviroment
Conscious