How to install bridge girder launcher safely?
1. Organization measure
Set up safety leading group headed by general manager. Group leader and group members
2. Safety training measure to install the boundary beam
A. in accordance with related rule formulates safe operation implementing regulations. Have a safety technology disclosure to construction personnel and
Carry out safety education
B. Organize constructor to have a safety technology training and assessment before installing girders. Therein, for special type of constructor, they must be employed with the certificate, for all who participate in installing the boundary beam and access to the worksite; it is needed to wear safety protective equipment.
3. Safety measures for lifting girder, dropping girder and transversely moving girder Frequently maintain circuits and tamp, frequently check whether rail surface elevation meets the demand to keep it in good condition. It is required to consolidate rail with rock ballast. It is forbidden for people to sta
nd on girders when lifting girder, dropping girder and transversely moving girder so that the accidents such as broken steel wire to hit people and other safety accidents will be avoided. During the process of lifting girder, dropping girder and transversely moving girder, 4 sleeper inclined strut should be arranged on both sides of each girder to protect the girder from overturning, immediately connect diaphragm plate and middle diaphragm plate. Before transversely moving the girder, it is required to thoroughly check rail, bridge girder launcher and overhead traveling crane.
4. Safety measures for longitudinally moving girder
Thoroughly check bridge girder launcher and rail before longitudinally moving girder. If there is a problem, solves it at once. Observe stress condition of rail and sleepers during process of longitudinally moving girder, promptly deal with it if there is a trouble.
5. Safety measures to install bridge construction machine
a. After being transporting to the worksite, re-check, detect, revise and test quantity and property of each construction member and unit on the basis of drawing. After finishing assembly, designate personnel to overall inspect, commission and test run.
b. After finishing installing, inspecting and commissioning the bridge construction machine, the crossing pier test and lifting test must be conducted on roadbed to ensure total safety when moving from one pier to another pier
c.In the process of test run and installing girders for the bridge construction machine, specially-assigned person commanding uniformly and clear division of labor are demanded. All operators are asked to coordinate operation and regulate unified signal and contact way according to procedure under uniform command.
d.After the bridge construction machine stops work, put cast brake shoe under each wheel along downhill direction to brake.
6. Safety measures to install girders
a. Keep rail top height on both sides of longitudinal moving rail in a level and stable, keep transversely moving rail in a level and have a strict control of gauge .
b. When front overhead crane and rear overhead crane lift T-type girder to move longitudinally, it is required to use 5t hand-operated guide chain to fix on piers in front support position to strengthen the stability.
c. When the bridge construction machine is installing girders, frequent safety check is necessary. Once one girder installation is finished, one thorough safety check begins. Only solve the problem found promptly, the machine can continue to work. The machine is not allowed to work with breakdown problems on mechanism and electrical equipment.
d. Overload operation and inclined lifting work are forbidden
e. When there has a heavy wind, heavy rain and heavy snow, stop constructing. When there is a heavy wind, it is necessary to use rigging to stabilize the bridge construction machine and lifting overhead crane. When the machine stops working, switch off the electricity, specially assign someone to put cast brake shoe to brake at front and rear part of wheels to avoid accidents
