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        襯(chen)(chen)(chen)(chen)砌(qi)(qi)(qi)(qi)(qi)結構和(he)形式都會選擇管片(pian)螺絲。盾構隧道(dao)襯(chen)(chen)(chen)(chen)砌(qi)(qi)(qi)(qi)(qi)有(you)三種類型：預制襯(chen)(chen)(chen)(chen)砌(qi)(qi)(qi)(qi)(qi)、擠壓混(hun)凝土(tu)(tu)整(zheng)體(ti)襯(chen)(chen)(chen)(chen)砌(qi)(qi)(qi)(qi)(qi)、雙層襯(chen)(chen)(chen)(chen)砌(qi)(qi)(qi)(qi)(qi)。預制襯(chen)(chen)(chen)(chen)砌(qi)(qi)(qi)(qi)(qi)里是(shi)工廠(chang)預制件(又叫做管片(pian))，組裝在盾構的尾部(bu)(bu)。雙層襯(chen)(chen)(chen)(chen)砌(qi)(qi)(qi)(qi)(qi)能夠避免隧道(dao)有(you)襯(chen)(chen)(chen)(chen)砌(qi)(qi)(qi)(qi)(qi)腐蝕和(he)滲水的情況，糾(jiu)正隧道(dao)施(shi)工錯誤，降低(di)噪音和(he)振動，還可(ke)以作為內部(bu)(bu)的裝飾，在預制襯(chen)(chen)(chen)(chen)砌(qi)(qi)(qi)(qi)(qi)內部(bu)(bu)制作一(yi)層鋼筋混(hun)凝土(tu)(tu)襯(chen)(chen)(chen)(chen)砌(qi)(qi)(qi)(qi)(qi)或者整(zheng)體(ti)混(hun)凝土(tu)(tu)。ECL是(shi)在盾構推進過程(cheng)中(zhong)，用(yong)一(yi)套(tao)襯(chen)(chen)(chen)(chen)砌(qi)(qi)(qi)(qi)(qi)施(shi)工設備在盾構尾部(bu)(bu)同步澆筑(zhu)的鋼筋混(hun)凝土(tu)(tu)整(zheng)體(ti)襯(chen)(chen)(chen)(chen)砌(qi)(qi)(qi)(qi)(qi)或者混(hun)凝土(tu)(tu)。

        盾構(gou)掘進(jin)機(ji)在(zai)(zai)掘進(jin)過程中需要把管(guan)(guan)片(pian)(pian)連(lian)接(jie)在(zai)(zai)一(yi)起，把管(guan)(guan)片(pian)(pian)進(jin)行(xing)連(lian)接(jie)和緊固(gu)，管(guan)(guan)片(pian)(pian)螺絲就是對管(guan)(guan)片(pian)(pian)連(lian)接(jie)和固(gu)定(ding)的一(yi)種緊固(gu)件。有了管(guan)(guan)片(pian)(pian)螺絲的連(lian)接(jie)，多個(ge)(ge)呈現拱形的管(guan)(guan)片(pian)(pian)連(lian)接(jie)在(zai)(zai)一(yi)起，形成一(yi)個(ge)(ge)圓，這個(ge)(ge)圓能夠把隧(sui)道的表面(mian)支撐起來，它是專用于隧(sui)道的緊固(gu)件，又叫做連(lian)接(jie)件。