Abstract:

In order to implement the synchronous construction of TBM tunneling and inverted arch lining, shorten the critical period of the project and improve the efficiency of tunnel construction, the synchronous lining formework trolley with asymmetrical structural type is designed. The layout mode of “frontal slope section + frontal switch section + 4 standard sections + rear slope section + rear switch section” is adopted for formework trolley. The lower part of the formework trolley is divided into many parts which can provide inverted arch concrete mixing, casting and curing. In accordance with long distance and large slope angle of branch tunnel and limited traffic conditions in TBM section, the connected material transport method of vehicle transport in branch tunnel and track transport in main tunnel is adopted to guarantee the rapid and ordered material transport. A track connecting device for slope lifting is set in front of and behind formework trolley respectively to ensure the smooth transition of vertical connection of standard track of TBM matching. It is shown that the application of formework trolley has reached a good effect, a maximum monthly advance has reached 648 m, and critical period of the project had been shortened.

Key words: open TBM, tunnel, invert arch lining, lining formwork trolley, synchronous construction