What are the regulations for anchoring screw spikes

screw spikes are a kind of railway spike, one of many railway equipment, which has the effect of tightening in all railway switches. In the daily inspection and maintenance, we must pay extra attention to screw spikes. On the one hand, we must ensure that the quality of screw spikes is up to standard, and on the other hand, we must properly install steel bars to anchor screw spikes. So, what are the norms to be followed when reinforcing bars anchor screw spikes?

1, screw spikes with sulfur powder mixed mortar reinforcement anchorage. The secret recipe and configuration processing technology of sulfur powder mixed mortar should meet the relevant requirements of railway track construction and construction acceptance code.

2, before reinforcement anchoring, cement tie embedded hole wall dirt and screw spikes on the adhesion should be cleaned and tidy. screw spikes should be dry and manic, and its temperature should be maintained above 0℃.

3, reinforcement anchoring method should be selected anti-anchor, screw spikes with mold accurate positioning. The reinforcement anchor slurry is introduced into the hole wall from the pillow bottom, and the mold is turned out after condensation. When the anchor is positive, the bottom end of the embedded hole should be blocked closely, and the slurry should be firmly prevented from running. After the reinforcement anchor slurry is introduced into the hole from the occipital surface, the screw spikes should turn slowly up and down and be vertically inserted into the accurate positioning. When the sulfur powder mixed mortar is introduced into the hole wall, the temperature should not be less than 130℃, and the concrete segregation should be avoided, one hole is filled at a time, the grouting depth should be 20 mm longer than the length of the screw spikes inserted into the hole, the top of the reinforced anchor slurry wall should be flat with the surface of the rail groove, and the spilled sludge should be disassembled and smooth after condensation.

4. screw spikes should be vertical with the groove surface of the bearing rail, and the inclination should not exceed 2°. The intersection point between the spike center line and the bearing rail groove surface, the offset embedded hole management center shall not exceed 2 mm, the bottom of the spike round table shall be higher than the bearing rail groove surface, but not more than 2 mm, and the pull force of screw spikes shall not be less than 60kn.

http://www.hbrailwayfastening.com
Suzhou HuiBo Railway Fastener Co.,Ltd