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预应力混凝土轨枕在我国已有30余年的历史,但目前我国的混凝土轨枕不适应在钢轨接头处和小半径曲线上使用,常常因承受过大的冲击力或较大的水平推力而过早失效,给养护维修带来困难,同时也限制了混凝土轨枕的使用范围。钢纤维混凝土具有高的抗冲击韧性和抗裂、抗拉、抗弯强度,非常适宜用于铁路轨枕。目前已在铁道部太原轨枕厂生产了220根“J—2”型钢纤维混凝土轨枕,铺设在石太线曲线半径为303米的线路上,进行运行试验。钢纤维混凝土轨枕的外型尺寸,预应力钢筋的配置均同“J—2”型定型轨枕相同。试验时钢纤维掺量从40、
Prestressed concrete sleepers have been in our country for more than 30 years, but at present, concrete sleepers in our country are not suitable for use on rail joints and small radius curves, and often premature failure due to excessive impact force or large horizontal thrust , To maintenance maintenance difficulties, but also limits the scope of the use of concrete sleepers. Steel fiber reinforced concrete with high impact toughness and crack resistance, tensile strength, bending strength, very suitable for railway sleepers. At present, 220 “J-2” steel fiber reinforced concrete sleepers are produced at the sleeper factory in Taiyuan, the Ministry of Railways. The sleeper is laid on a line with a radius of 303 meters and a running radius of 303 meters. Steel fiber reinforced concrete sleeper dimensions, prestressed steel configuration are the same as “J-2” type fixed sleeper. Test steel fiber content from 40,