中鐵隧道集團輪(lun)胎(tai)式起(qi)(qi)(qi)重(zhong)(zhong)機(ji)(ji)是把起(qi)(qi)(qi)重(zhong)(zhong)安(an)裝在加(jia)重(zhong)(zhong)型輪(lun)胎(tai)和(he)輪(lun)軸(zhou)組(zu)成的(de)(de)特制底盤上(shang)的(de)(de)一種全回(hui)轉(zhuan)式起(qi)(qi)(qi)重(zhong)(zhong)機(ji)(ji)，其上(shang)部構造與(yu)履(lv)帶式起(qi)(qi)(qi)重(zhong)(zhong)機(ji)(ji)基本相同，為了保證安(an)裝作(zuo)業時(shi)機(ji)(ji)身(shen)的(de)(de)穩(wen)定(ding)(ding)性，起(qi)(qi)(qi)重(zhong)(zhong)機(ji)(ji)設(she)有四個可伸縮(suo)的(de)(de)支(zhi)腿。在平坦地面(mian)上(shang)可不用(yong)(yong)支(zhi)腿進(jin)行小起(qi)(qi)(qi)重(zhong)(zhong)量吊(diao)裝及吊(diao)物低速行駛(shi)。它由(you)上(shang)車(che)(che)和(he)下(xia)(xia)車(che)(che)兩(liang)部分組(zu)成。上(shang)車(che)(che)為起(qi)(qi)(qi)重(zhong)(zhong)作(zuo)業部分，設(she)有動臂、起(qi)(qi)(qi)升、變(bian)幅、平衡重(zhong)(zhong)和(he)轉(zhuan)臺等；下(xia)(xia)車(che)(che)為支(zhi)承和(he)行走部分。上(shang)、下(xia)(xia)車(che)(che)之間用(yong)(yong)回(hui)轉(zhuan)支(zhi)承連接。吊(diao)重(zhong)(zhong)時(shi)一般需放下(xia)(xia)支(zhi)腿，增大(da)支(zhi)承面(mian)，并將機(ji)(ji)身(shen)調平，以(yi)保證起(qi)(qi)(qi)重(zhong)(zhong)機(ji)(ji)的(de)(de)穩(wen)定(ding)(ding)。
