Myzox Monitoring Prism for Construction Site Movement Monitoring

 

Construction projects can involve excavation, piling, foundation works and structural activities that require selected points to be observed repeatedly throughout different stages of the project.

 

The Myzox TK-10S / TK-10 Monitoring Prism L-Bar Type provides a fixed reflective target for repeated total station measurements, making it suitable for construction site movement and deformation monitoring in Malaysia.

 

Once securely installed, each prism creates a defined monitoring point that can be observed repeatedly without repositioning a conventional prism pole during every monitoring session.

 

MTM Precision Sdn. Bhd. is an authorized distributor of Myzox in Malaysia.

 

What Is Construction Site Movement Monitoring?

 

Construction monitoring involves measuring selected points over time and comparing their positions between different observation periods.

 

Depending on the project, monitoring may involve:

 

Existing buildings

 

Retaining structures

 

Excavation areas

 

Bridges

 

Slopes

 

Structural elements

 

Adjacent infrastructure

 

Other designated monitoring locations

 

Survey measurements provide positional information that can support the project's engineering monitoring program.

 

When May Construction Monitoring Be Required?

 

Monitoring can be relevant during activities such as:

 

Piling

 

Deep excavation

 

Basement construction

 

Foundation works

 

High-rise construction

 

Demolition

 

Tunnelling

 

Road construction

 

Bridge works

 

Railway and MRT projects

 

Slope stabilization

 

The monitoring requirements and observation frequency should be established according to the project specification.

 

How Does a Monitoring Prism Work?

 

A monitoring prism is installed at a predetermined point.

 

The total station measures the target and establishes its initial position.

 

The same prism is then measured again later.

 

A simple workflow is:

 

Install Prism → Baseline Survey → Construction Activity → Repeat Survey → Compare Coordinates → Evaluate Changes

 

The fixed target provides a consistent physical reference point for repeated observations.

 

Monitoring Before Construction Starts

 

Where possible, monitoring should begin before the relevant construction activity.

 

This allows baseline measurements to be established.

 

For example:

 

Pre-Construction Baseline

↓

Piling Works

↓

Excavation

↓

Foundation Construction

↓

Structural Works

↓

Completion

 

Measurements from later stages can then be compared with the baseline and previous observations.

 

Monitoring Existing Buildings Near Construction

 

Existing structures located near major construction works may form part of the monitoring program.

 

Myzox monitoring prisms can be installed at selected locations on the building to provide fixed targets.

 

Potential monitoring locations may include:

 

Building façades

 

Structural columns

 

Concrete walls

 

Perimeter structures

 

Other selected structural points

 

The exact locations should be determined by the responsible project professionals.

 

Monitoring Retaining Structures

 

Retaining walls and excavation support structures are another common application.

 

Several monitoring prisms can be installed at selected positions.

 

For example:

 

MP01 — MP02 — MP03 — MP04 — MP05

 

Repeated observations can provide positional information from multiple sections of the structure.

 

This is generally more informative than relying on a single monitoring point for a large structure.

 

Monitoring Construction Near Roads

 

Major developments can take place close to roads and other infrastructure.

 

Where a survey monitoring program is specified, fixed prism targets can support repeated observations of selected structures.

 

Potential applications include:

 

Road widening projects

 

Highway construction

 

Flyover works

 

Bridge construction

 

Underground utility projects

 

Adjacent excavation

 

Monitoring target selection should consider both engineering requirements and total station visibility.

 

Monitoring Construction Near Railway or MRT Infrastructure

 

Large construction projects located near railway infrastructure may require monitoring of selected structures.

 

Fixed monitoring prisms can provide total station targets throughout different construction stages.

 

The same approach can support monitoring around:

 

MRT projects

 

Railway corridors

 

Viaducts

 

Stations

 

Tunnels

 

Adjacent buildings

 

Myzox TK-10S / TK-10 Specifications

 

SpecificationDetailsModelsTK-10S / TK-10TypeMonitoring Prism L-Bar TypePrism Size1 inch / 25 mmPrism Constant-25 mmPrism Height60 mmBeam Deviation5″DimensionsH90 × W86.5 × D30 mmWeightApprox. 207 gAdjustmentX/Y direction

 

Its compact configuration makes it suitable for fixed monitoring points where a conventional prism assembly may be inconvenient.

 

Why Is a Fixed Prism Better for Repeated Monitoring?

 

A conventional prism pole must be positioned manually during each observation.

 

For general surveying, this is exactly what is required.

 

For monitoring, however, surveyors usually want the target to remain at the same defined location.

 

A fixed monitoring prism helps reduce variables associated with repeatedly recreating a target position.

 

This makes it particularly useful for long-term construction monitoring.

 

X/Y Adjustment for Site Installation

 

Construction sites rarely provide perfect target geometry.

 

A wall or structural surface may not face directly toward the total station.

 

The Myzox TK-10S / TK-10 provides X/Y directional adjustment, allowing the prism to be oriented toward the intended observation position.

 

This can make target installation more flexible.

 

High-Visibility Monitoring Target

 

Monitoring points can become difficult to identify on busy construction sites.

 

The TK-10S high-visibility design can help survey teams locate installed targets.

 

For good monitoring management, each target should also have:

 

Unique point ID

 

Installation photograph

 

Location description

 

Monitoring drawing

 

Baseline record

 

This becomes especially important on projects containing many monitoring points.

 

Horizontal Movement Monitoring

 

Total station measurements can be processed into coordinates.

 

Comparing horizontal coordinates between observation periods can provide information about positional changes.

 

For example:

 

Baseline X/Y → Current X/Y → Difference

 

Multiple observations over time can then establish a movement trend.

 

Vertical Movement Monitoring

 

Depending on the survey methodology, total station observations can also provide elevation information.

 

For projects requiring high-precision settlement measurements, dedicated precise levelling or other appropriate monitoring methods may also be used.

 

The required instrumentation should match the monitoring specification.

 

3D Movement Monitoring

 

A total station can measure:

 

Horizontal angle

 

Vertical angle

 

Distance

 

These observations can be used to determine three-dimensional coordinates.

 

Repeated measurements of fixed prisms can therefore support comparison of changes in:

 

X position

 

Y position

 

Z position

 

This is one reason prism-based total station monitoring is useful for many structural and construction applications.

 

Protect Monitoring Points During Construction

 

A major challenge on construction sites is keeping monitoring targets undisturbed.

 

Prisms can potentially be affected by:

 

Machinery

 

Scaffolding

 

Formwork

 

Temporary structures

 

Construction workers

 

Material storage

 

Accidental impact

 

Demolition activities

 

Targets should therefore be inspected periodically.

 

If a prism is disturbed, the monitoring team should follow the project's procedure before comparing the new position with the original baseline.

 

Check Line of Sight Regularly

 

A monitoring point that is visible during installation may later become blocked.

 

Before every observation campaign, check for:

 

Scaffolding

 

Safety netting

 

Cranes

 

Temporary walls

 

Hoarding

 

Equipment

 

New construction

 

Vegetation

 

Maintaining a usable line of sight is essential for total station monitoring.

 

Correct Prism Constant

 

The Myzox TK-10S / TK-10 has a specified:

 

Prism Constant: -25 mm

 

Surveyors should configure the correct prism setting according to the total station manufacturer's procedures.

 

Using the wrong prism constant can introduce a systematic distance offset.

 

For repeated monitoring work, this setting should be checked before measurements begin.

 

Stable Survey Control Is Essential

 

Monitoring prisms should be measured relative to suitable survey control.

 

A simplified monitoring system is:

 

Stable Reference Network → Total Station → Monitoring Prisms

 

If reference control moves, apparent changes may appear in the target coordinates.

 

Monitoring therefore requires attention to both target stability and reference network stability.

 

Monitoring Frequency

 

There is no single monitoring interval suitable for every construction project.

 

Measurements may be scheduled:

 

Daily

 

Weekly

 

At specific construction stages

 

Before and after critical activities

 

According to project requirements

 

Monitoring frequency should be determined by the responsible project professionals.

 

Manual vs Automated Construction Monitoring

 

Manual Monitoring

 

A surveyor visits the site and measures the fixed prisms at scheduled intervals.

 

Automated Monitoring

 

Suitable specialized total station systems may repeatedly observe predetermined targets and process the measurements using monitoring software.

 

Fixed monitoring prisms can serve as targets in either type of workflow depending on the system design.

 

Total Station Calibration for Monitoring Projects

 

Construction monitoring relies on repeated measurements where consistency matters.

 

Survey instruments should therefore be appropriately maintained and checked.

 

MTM Precision provides total station calibration and surveying instrument service in Malaysia for professional construction and surveying applications.

 

Myzox Construction Monitoring Prism Supplier in Malaysia

 

MTM Precision supplies Myzox monitoring prisms, total station accessories and professional surveying equipment in Malaysia.

 

The Myzox TK-10S / TK-10 can support:

 

Building monitoring

 

Deep excavation monitoring

 

Retaining wall monitoring

 

Bridge monitoring

 

Slope monitoring

 

High-rise monitoring

 

Railway and MRT monitoring

 

General structural deformation monitoring

 

Contact MTM Precision

 

MTM Precision Sdn. Bhd.

Myzox Authorized Distributor in Malaysia

 

Showroom & Service Centre

No. 29-1 & 29-2, Jalan Bandar 18,

Pusat Bandar Puchong,

47160 Puchong, Selangor, Malaysia.

 

Website: www.mtmpre.com.my

Email: mtmpre@yahoo.com

WhatsApp: +6016-6607346

 

Contact MTM Precision for Myzox TK-10S / TK-10 Monitoring Prism price, availability and construction monitoring enquiries in Malaysia.