MRT & Metro Viaduct Construction

Building Efficient Urban Transportation Infrastructure

MRT and metro viaduct construction is a highly specialized engineering process designed to build elevated railway systems in densely populated urban environments.

Unlike conventional bridge projects, metro viaduct construction requires strict control of limited construction space, traffic impact, noise, safety risks, and urban environmental conditions.

The use of precast concrete segments, segment erection technology, and launching gantry systems enables efficient construction while minimizing disturbance to surrounding communities.

Bridge Construction Hub provides engineering knowledge, construction equipment, and procurement solutions covering every stage of MRT and metro viaduct construction — from urban site preparation to segment erection and final system completion.

1. Site Preparation

Overview

Site preparation for MRT and metro viaduct projects is carried out in complex urban environments where construction space is often limited.

Engineers must carefully organize traffic management, temporary access, utility protection, and construction zones while maintaining safe operation of surrounding roads and facilities. Proper planning during this stage reduces disruption and creates safe conditions for continuous viaduct construction.

Key Activities

• Urban Site Survey

• Traffic Diversion Planning

• Utility Protection and Relocation

• Temporary Construction Area Setup

• Night Construction Preparation

• Access Route Arrangement

• Safety Barrier Installation

• Construction Layout

Main Equipment

• Survey Equipment

• Excavators

• Mobile Cranes      

• Traffic Management Equipment

• Small Construction Machinery

Main Materials

• Temporary Barriers

• Safety Fencing

• Warning Signs      

• Geotextile

• Temporary Road Materials

2. Foundation Construction

Overview

MRT viaduct foundations transfer loads from piers and elevated structures safely into the ground.

Due to limited urban space, foundation works often require compact equipment, strict vibration control, and careful coordination with existing buildings, roads, and underground utilities. High-quality foundation construction ensures long-term stability and safe metro operation.

Key Activities

• Geological Investigation

• Bored Pile Construction

• Reinforcement Cage Installation

• Concrete Pouring

• Pile Testing

• Pile Cap Construction

• Underground Utility Protection

Main Equipment

• Rotary Drilling Rig

• Crawler Crane      

• Concrete Pump      

• Rebar Processing Equipment

• Excavator

Main Materials

• Reinforcing Steel

• Concrete

• Cement

• Bentonite

• Anchor Bolts

3. Pier Construction

Overview

Metro viaduct piers support elevated railway structures above urban roads and public areas.

Because construction takes place in restricted spaces, pier construction requires accurate alignment control, efficient formwork systems, and strict safety management.

The final pier position directly affects segment erection accuracy and railway alignment.

Key Activities

• Reinforcement Installation

• Pier Formwork  Assembly

• Concrete Casting

• Concrete Curing

• Bearing Pedestal Construction

• Vertical  Alignment Inspection

Main Equipment

• Mobile Crane

• Concrete Pump      

• Formwork System

• Scaffolding

• Survey Equipment

Main Materials

• Reinforcing Steel

• High Strength Concrete

• Formwork Panels

• Bearing Plates

• Embedded Components

4. Segment Erection

Overview

Segment erection is the most important construction stage for MRT and metro viaduct projects.

Precast concrete segments are manufactured in controlled factories, transported to the construction site, and installed using specialized erection equipment such as launching gantries. This method allows rapid construction with minimal impact on busy urban areas.

Key Activities

• Segment Production

• Segment Transportation

• Launching Gantry Installation

• Segment Lifting

• Segment Positioning

• Epoxy Bonding      

• Temporary Fixing

• Alignment Adjustment

Main Equipment

• Launching Gantry

• Segment Transport Trailer

• Hydraulic Jack

• Gantry Crane

• Survey Equipment

Main Materials

• Precast Concrete Segment

• Epoxy Adhesive

• Bridge Bearing

• Prestressing Strand

• Grouting Material

5. Prestressing

Overview

Prestressing connects concrete segments into a continuous structural system and improves strength, durability, and resistance against repeated train loading.

Hydraulic stressing equipment is used to tension steel strands and permanently lock the structure together.

Key Activities

• Tendon Installation

• Steel Strand Installation

• Hydraulic Stressing

• Elongation Measurement

• Anchorage Installation

• Duct Grouting      

• Quality Inspection

Main Equipment

• Hydraulic Jack

• Hydraulic Pump

• Stressing Equipment

• Grouting Pump      

• Measuring  Instruments

Main Materials

• Prestressing Steel Strand

• Anchorage System

• Wedges

• HDPE Duct

• Grouting Material

6. Deck & Track Construction

Overview

The deck construction stage prepares the final structure for metro operation.

Works include deck finishing, waterproofing, drainage installation, track slab construction, and railway system interfaces.

High accuracy is required to ensure passenger comfort and safe train operation.

Key Activities

• Deck Finishing

• Waterproofing      

• Drainage Installation

• Track Slab Construction

• Rail Installation Preparation

• Safety Barrier Installation

Main Equipment

• Concrete Finishing Machine

• Survey Equipment

• Lifting Equipment

• Track Installation Tools

Main Materials

• Concrete

• Waterproof Membrane

• Track Slab

• Drainage System

• Expansion Joint

7. Completion & Metro Operation

Overview

The completion stage includes final inspection, structural testing, railway system integration, and project handover.

Engineers verify that the MRT viaduct meets safety requirements, operational standards, and urban transportation needs before opening to passengers.

Key Activities

• Structural Inspection

• Load Testing

• Track  Alignment Check

• Signal System Testing

• Electrical System Testing

• Final Acceptance      

• Project Handover

Main Equipment

• Inspection Equipment

• Survey Instruments

• Testing Equipment

• Maintenance Vehicle

Main Materials

• Railway System Components

• Signaling Equipment

• Safety Equipment

• Expansion Joint System

Q: When will you arrange the production?
A: We usually arrange the production immediately after receiving your payment if we have the item in stock. Otherwise, please confirm with us for lead time.

Q: What is your accepted payment type?
A: Wire transfer, Paypal and Western Union, and Alibaba Trade Assurance.We only accept Paypal and Western Union, and Alibaba Trade Assurance for payment amounts below USD400.

Q: What logistic forwarder do you usually work with?
A: We work with EMS, TNT, UPS, FEDEX and other logistric forwarders. Assigned your own forwarder for shipment is available.

Q: What if the Wireless Charging Bundle is not charging my device(s)?
A: 1. Check to ensure that your device is Qi-compliant.
2. Check to ensure that the AC adapter you’re using with the Wireless Charging Bundle has an output of 2A or more.
3. Check to ensure that you are placing your phone on the center of Wireless Charging Bundle.
4. Check to ensure the phone is not in a 5mm or thicker case when charging.
5. Check to ensure there is no metal obstruction on the back of the phone/phone case, or credit cards inside the case.
6. The Wireless Charging Bundle’s cable may be faulty. Try using a different cable.
7. Restart your phone. If the problem persists, please email us at support@anker.com to claim your 18-month warranty. Request sent to owner.

Q: How does the Wireless Charging Bundle charging speed compare to a traditional wired charger?
A: It depends on your device, but wireless charging generally charges at a slower rate.

Q: What is the Wireless Charging Bundle charging speed?
A: Charging speed varies depending on the device. You can expect a maximum charge current of 1A.

Q: What kind of AC adapter should I use with Wireless Charging Bundle?
A: Make sure that the AC adapter that you use has a minimum output of 2A, otherwise your devices may not charge properly.

Q: Can I use a different USB cable instead of the cable that comes with Wireless Charging Bundle?
A: Yes, other Micro USB cables can be used, but to ensure the utmost safety and performance, we strongly recommend using your device’s original cable (OEM) to charge your devices with the Wireless Charging Bundle.

Q: What does Wireless Charging Bundle’s LED indicator show while charging?
A: When the charging pad is powered up, you pick up your phone during charging, or your phone is fully charged, the LED indicator will display blue for 3 seconds before turning off. While your phone is charging, the LED will display a steady blue. If your phone is not charging normally or the temperature is too high, the LED will flash blue. Request sent to owner.

Q: Is radiation from wireless chargers harmful to one’s health?
A: The PowerPort Wireless 5 Pad only emits non-ionizing radiation which is not harmful to humans. What’s more, it’s certified with FCC, CE, RoHS, etc.

Q: Does wireless charging affect other wireless devices?
A: No. Wireless chargers use frequencies between 110-205kHz, which are in a different range than most wireless devices. What’s more, it’s certified with FCC, CE, RoHS, etc.

Q: Does this charger produce excessive heat?
A: When in use, this charger’s temperature should not exceed 104°F/40°C.