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钢筋混凝土轨枕铺有绝缘缓冲垫板是作为一种弹性垫层而设置的,对机车车辆、混凝土轨枕和道床起缓冲减振作用,防止车轮及钢轨磨耗、道床硬结破坏。为了延长垫板的使用寿命增加垫层的弹性,无论叁标线(70)3100“70型扣板式扣件”;或专线(67)3069“67型弹片件”均规定在橡胶垫板下与轨枕承轨槽之设3毫米厚的衬垫(图1)。 1975年3至8月,共调查了五万余根钢筋混凝土轨枕,基本上橡胶垫板下未铺设3毫米的衬垫;并走访了一些工程局和铁路局的铺轨单位。轨排组装时直接将橡胶垫板安装到轨枕的承轨槽上,在垫板与轨枕间未铺设衬垫。为
Reinforced concrete sleepers with an insulating cushion plate is provided as an elastic cushion layer, which acts as a buffer against vibrations of locomotives, concrete sleepers and track beds to prevent wheel and rail abrasion and damage to the ballast beds. In order to prolong the service life of the mat and to increase the elasticity of the mat, either type 3100 “Type 70 gusset-type fastener” or “Special line 67” or “Type 6969” Sleeper rail groove set 3 mm thick liner (Figure 1). From March to August 1975, a total of more than 50,000 reinforced concrete sleepers were surveyed. Basically, there was no 3 mm padding laid under the rubber pad. Some of the laying units of the Engineering Bureau and the Railway Administration were visited. Rail assembly assembly directly to the rubber rail mounted to the sleeper rail groove, cushion and sleeper is not laid between the liner. for