中鐵(tie)隧道集團(tuan)輪胎式(shi)起(qi)(qi)(qi)重(zhong)(zhong)(zhong)機(ji)(ji)是把起(qi)(qi)(qi)重(zhong)(zhong)(zhong)安裝(zhuang)在加重(zhong)(zhong)(zhong)型輪胎和(he)輪軸(zhou)組成(cheng)的特制底盤上(shang)(shang)的一(yi)種全(quan)回轉式(shi)起(qi)(qi)(qi)重(zhong)(zhong)(zhong)機(ji)(ji)，其(qi)上(shang)(shang)部構(gou)造與履(lv)帶(dai)式(shi)起(qi)(qi)(qi)重(zhong)(zhong)(zhong)機(ji)(ji)基本相同，為(wei)了保證安裝(zhuang)作(zuo)(zuo)業(ye)時機(ji)(ji)身的穩定(ding)性，起(qi)(qi)(qi)重(zhong)(zhong)(zhong)機(ji)(ji)設有四個可伸縮的支(zhi)腿(tui)(tui)。在平(ping)坦地(di)面(mian)上(shang)(shang)可不用支(zhi)腿(tui)(tui)進(jin)行(xing)小起(qi)(qi)(qi)重(zhong)(zhong)(zhong)量(liang)吊(diao)裝(zhuang)及(ji)吊(diao)物低速行(xing)駛。它(ta)由上(shang)(shang)車(che)和(he)下車(che)兩部分組成(cheng)。上(shang)(shang)車(che)為(wei)起(qi)(qi)(qi)重(zhong)(zhong)(zhong)作(zuo)(zuo)業(ye)部分，設有動臂、起(qi)(qi)(qi)升、變幅、平(ping)衡重(zhong)(zhong)(zhong)和(he)轉臺等；下車(che)為(wei)支(zhi)承和(he)行(xing)走部分。上(shang)(shang)、下車(che)之間用回轉支(zhi)承連(lian)接。吊(diao)重(zhong)(zhong)(zhong)時一(yi)般需放下支(zhi)腿(tui)(tui)，增(zeng)大支(zhi)承面(mian)，并將機(ji)(ji)身調平(ping)，以(yi)保證起(qi)(qi)(qi)重(zhong)(zhong)(zhong)機(ji)(ji)的穩定(ding)。
