Volume 8 – Mechanical and Electrical Services - Malaysia Geoportal

Chapter 2 GATE DESIGN
Table of Contents
Table of Contents .................................................................................................................... 2-i
List of Tables ................................................................................................................... 2-iii
List of Figures ................................................................................................................... 2-iii
2.1 INTRODUCTION .......................................................................................................... 2-1
2.2 TYPES OF GATES ......................................................................................................... 2-6
2.2.1 Roller Type ................................................................................................... 2-6
2.2.2 Hinged Type ................................................................................................. 2-9
2.2.3 Slide Type .................................................................................................. 2-13
2.2.4 Flap Gate ................................................................................................... 2-15
2.2.5 Stop logs and Bulkhead Gates ...................................................................... 2-17
2.3 GATE DESIGN ........................................................................................................... 2-18
2.3.1 General ...................................................................................................... 2-18
2.3.2 Loads to be Considered ............................................................................... 2-19
2.3.3 Shape of Gate Leaf, Gate Guide and Anchorage ............................................. 2-19
2.3.4 Seal Part .................................................................................................... 2-19
2.3.5 Corrosion Allowance .................................................................................... 2-19
2.3.6 Deflection of Gate Leaf ................................................................................ 2-20
2.3.7 Operating Speed ......................................................................................... 2-20
2.3.8 Lifting Height .............................................................................................. 2-20
2.3.9 Leakages .................................................................................................... 2-20
2.3.10 Hoist System .............................................................................................. 2-21
2.4 MATERIAL SELECTION ............................................................................................... 2-21
2.4.1 Materials for Hydraulic Gates ........................................................................ 2-22
2.4.2 Penstock Materials ...................................................................................... 2-22
2.4.3 Corrosion Protection .................................................................................... 2-23
2.5 GATE INSTALLATION ................................................................................................. 2-24
2.5.1 Handling During Transportation .................................................................... 2-25
2.5.2 General Installation ..................................................................................... 2-25
2.5.3 Installation of Gate Guide and Anchorage ..................................................... 2-25
2.5.4 Installation of Seal Part ............................................................................... 2-25
2.6 GATE TESTING AND COMMISSIONING ........................................................................ 2-26
2.6.1 Penstock inspection and testing .................................................................... 2-26
2.7 GATE OPERATION & MAINTENANCE MANUAL .............................................................. 2-27
APPENDIX 2A SAMPLE METHOD STATEMENT FOR TILTING GATE AND HYDRAULIC CYLINDER
INSTALLATION ........................................................................................... 2A-1
March 2009 2-i