接頭只不(bu)過便是栓(shuan)接的電焊焊接的，可是在具(ju)體(ti)運(yun)用全(quan)過程中(zhong)會出(chu)現(xian)許(xu)多獨特的狀況，下邊(bian)我們用圖型(xing)簡(jian)易的表明一(yi)下吧。

鎖定(ding)(ding)接(jie)頭。栓(shuan)接(jie)接(jie)頭全(quan)是(shi)(shi)(shi)容許軌縫在0—20mm中間(jian)轉變(bian)(bian)的，可是(shi)(shi)(shi)一(yi)(yi)些狀況瞎不允許或(huo)是(shi)(shi)(shi)不用，可是(shi)(shi)(shi)又不能夠電(dian)焊焊接(jie)，因此就(jiu)出(chu)現(xian)了鎖定(ding)(ding)接(jie)頭。鎖定(ding)(ding)接(jie)頭便是(shi)(shi)(shi)軌縫鎖定(ding)(ding)死不轉變(bian)(bian)的栓(shuan)接(jie)接(jie)頭，并且是(shi)(shi)(shi)導(dao)電(dian)性的。現(xian)在有二種鎖定(ding)(ding)方式，一(yi)(yi)種是(shi)(shi)(shi)在螺栓(shuan)和絲孔(kong)中間(jian)的間(jian)隙處添充金屬材料月牙(ya)塊，另一(yi)(yi)種是(shi)(shi)(shi)立即用高韌性的螺栓(shuan)和夾板擰死，靠滑動摩擦(ca)力鎖定(ding)(ding)軌縫。第二種簡便易行靠譜，早已(yi)變(bian)(bian)成(cheng)了流行。

粉(fen)細(xi)砂(sha)接(jie)頭(tou)(tou)(tou)。粉(fen)細(xi)砂(sha)接(jie)頭(tou)(tou)(tou)便是(shi)(shi)絕(jue)緣層的(de)(de)鎖(suo)定(ding)(ding)(ding)接(jie)頭(tou)(tou)(tou)，它是(shi)(shi)不僅鎖(suo)定(ding)(ding)(ding)軌縫(feng)（鋼軌的(de)(de)溫度(du)里能夠跨接(jie)頭(tou)(tou)(tou)傳送）又(you)要確保絕(jue)緣層的(de)(de)規定(ding)(ding)(ding)。因此便是(shi)(shi)在一般的(de)(de)絕(jue)緣層接(jie)頭(tou)(tou)(tou)的(de)(de)螺栓、夾板、軌縫(feng)部位(wei)涂上強力膠粘(zhan)合(he)在一起，產生了粉(fen)細(xi)砂(sha)接(jie)頭(tou)(tou)(tou)。