NOH3 Launching Girder Assembly and Erection VSL

NOH3–LAUNCHING GANTRY PRESENTATION RAMP BRIDGES

NOH3 – 3D model Junction 7 NOH3 – Launching Gantry Assembly – 23rd January 2016

24th January 2016 NOH3 – RAMP BRIDGES – LAUNCHING GANTRY 2

TABLE OF CONTENT

INTRODUCTION

1. 1. WHAT IS A LAUNCHING GANTRY MADE OF ?

1.1 COMPOSITION 1.2 FUNCTIONS 2. LAUNCHING GANTRY’S STORY 2.1 BRIEF & DESIGN 2.2 REVIEWS/INTERFACE 2.3 FABRICATION 2.4 ASSEMBLY & ERECTION 2.5 MEOP & COMMISSIONING

INTRODUCTION

24th January 2016 NOH3 – RAMP BRIDGES – LAUNCHING GANTRY PRESENTATION 3

A Launching Gantry is: • Mechanized steel structure • Designed for the erection of precast concrete bridge

Reference photo – Launching Gantry – Ernest F. Lyons Bridge - USA

I. WHAT IS A LAUNCHING GANTRY MADE OF ?


1.1 COMPOSITION

The Launching Gantry is composed of 4 main elements: - Main Trusses (MT) (2 nos.) - Universal Lower Roller Support (ULRS) (4 nos.) - Lower Cross Beam (LCB) (2 nos.) - Propping system (Prop’s & Base Frame) (2 nos.)

MT

ULRS

LCB

General Arrangement of Launching Girder

Propping system

I. WHAT IS A LAUNCHING GANTRY MADE OF ?


1.2 FUNCTIONS - MT: Structural element that supports the

segments

- ULRS: Main support of the MT. It adjusts

the position of the MT

- LCB: Transfers the load from the ULRS to

the propping system

- Propping system: Transfers the load from

the LCB to the pier foundation

MT

ULRS

LCB

Propping System

2. LAUNCHING GANTRY’S STORY


2.1 Brief & Design

2.2 Design & Interface

Review

2.3 Fabrication

2.4 Assembly & Erection

2.5 MEOP &

Commissioning (Major Equipment Operation Permit)



2.1 BRIEF & DESIGN

Brief • Max. span weight = 900 Tons • Lmax = 46.32m • 6% cross-fall & 6% gradient • Perform Self Launching

Design • Main Truss (MT) • Universal Lower Roller Support (ULRS) • Lower Cross Beam (LCB) • Propping system

Construction Sequence – Mott MacDonald

INTERFACE REVIEW



2.2 DESIGN & INTERFACE REVIEWS

Peer Review 3rd Party Check Interface

Yves Gauthier

EMCH Berger

Mott Macdonald VSL Middle East

Produced Document: Peer Report Review

Produced Document: ICE

Produced Documents: Technical Queries

DESIGN REVIEWS



2.4 FABRICATION

Steel Structures

Indiana Grating

Produced Documents: Mills Test certificates

Welding Tests Inspection reports

Equipments

Micco

Produced Documents: Mills Test certificates

Welding Tests Inspection reports

Welding Test – Indiana Grating

Local VSL supervision

Trial Assembly– Indiana Grating

Noses fabrication– Indiana Grating



2.5 ASSEMBLY & ERECTION

What are the steps ?

1) Assembly of Propping Systems around the piers

2) Assembly of LCB & ULRS on top of the Propping Systems

3) Assembly of MT on the Ground

NOH3 - Propping System Assembly

Monitoring of the Assembly

• Checklists

• Stressing Reports

• Daily Visual Inspections

NOH3 – Stressing Report NOH3 – Splice connection



2.5 ASSEMBLY & ERECTION


1) Tandem Lift: Erection of 1st Main Truss

2) Tandem Lift: Erection of 2nd Main Truss

3) Single Lift: Erection of Noses

KVMRT – Lifting of Launching Gantry - Malaysia

Monitoring of the Erection

• Erection Checklist

• Close Supervision

NOH3 – Erection checklist



2.6 MEOP & COMMISSIONING

MEOP (Major Equipment Operation Permit): Internal Quality Procedure

It ensures: • The correct set-up of equipment and operating systems • The competence of management and operators • Implementation of best practices


1) Review of Personnel (CVs)

2) Review of Equipment

3) Review of MS & ITP

4) Review of Trainings

Conducted by ?

VSL Senior personnel from the operations, technical and quality/safety/environment teams



2.6 MEOP & COMMISSIONING

Structure Testing: What are the steps ?

1) Loading of the LG

2) Measurement of the deflection

3) Close control/inspection of the whole structure

NOH3 – Load Test

Equipment Testing: What are the steps ?

1) Testing of all electrical items

2) Testing of all hydraulic items

Thank you Any questions?

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