Design and static characteristics analysis of tunneling temporary support
Aiming at the low construction efficiency of traditional roadway support method,which limits the tunneling efficiency,a new type of support was designed.The three-dimensional assembly model was established by Solid Works,and the static load characteristics of the support under internal loading and intermediate external loading were analyzed by ANSYS Workbench software.The results show that the deformation of the support under intermediate external loading is 10.27 times of that under internal loading,and the stress and strain are 2.14 and 2.13 times,respectively;the support deformation under internal loading mainly concentrates in the vicinity of the articulation point of the cover frame and the counterbalance jacks,whereas that under intermediate external loading mainly concentrates in the front end of the upper beam frame.The support stress and strain under internal loading mainly appear in the hinged point of the articulated bearing supports of upper beam frame and the supporting jacks,and the articulated bearing supports of the cover frame and the balancing jacks;while under intermediate external loading,those mainly appear in the contact area between the loading plate and the upper beam frame,and the cover frame and the front connecting rod also had more obvious stress and strain.By choosing the appropriate material,the support can be highly reliable in both loading modes.
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