Combined type miniature TBM

The invention discloses a combined type miniature TBM. The combined type miniature TBM comprises a TBM machine head (1) and a trolley mechanism (2), wherein a propelling supporting mechanism (3) is arranged between the TBM machine head (1) and the trolley mechanism (2), and the front end of the propelling supporting mechanism (3) abuts against the rear end of the TBM machine head (1). The combinedtype miniature TBM has the advantages of being small in occupied space, ingenious in structural design, reliable in use and low in cost. By the adoption of the combined type miniature TBM, construction can be conducted in a small-section tunnel rapidly and conveniently, two construction modes of small-section TBM tunneling construction are provided, construction efficiency is improved, the construction period is shortened, and cost is reduced. 本发明公开了一种复合式微型TBM，包括TBM机头（1）和台车机构（2），在所述TBM机头（1）与台车机构（2）之间设置有推进支撑机构（3），所述推进支撑机构（3）的前端顶在TBM机头（1）的后端。本发明具有占用空间小、结构设计巧妙、使用可靠、成本低廉的优点，采用它能够在小断面隧道内进行快速方便的施工，提供了小断面TBM掘进施工的两种施工模式，提高了施