Open section tunnel structure combined with cast-in-place and prefabricated assembly

Abstract

The invention discloses an open section tunnel structure with cast-in-place and prefabricating assembling combined. The open section tunnel structure comprises a prefabricated assembled component serving as the lower half portion of an open section tunnel, a cast-in-place component located on the prefabricated assembled component, and a tensioned permanent pre-stressed anchor cable used for carrying out longitudinal tensioning and fixing. A steel edge waterstop is arranged on the longitudinal contact face of the prefabricated assembled component and the cast-in-place component. A mortise connector is arranged in the longitudinal direction of the prefabricated assembled component. An inserting rib is reserved on the side wall of the prefabricated assembled component, and a rabbet is formed in the upper end of the side wall. The tensioned permanent pre-stressed anchor cable and the prefabricated assembled component are connected. By means of the open section tunnel structure, on the one hand, the cast-in-place work quantity can be reduced, the construction quality of the structure can be improved, and the construction period can be shortened; on the other hand, after the open section structure is constructed, the influence on surrounding traffic and resident life can be reduced, the occupied construction plant is reduced, and risk sources affecting construction safety are reduced.

Description

technical field [0001] The invention relates to the field of underground engineering construction, in particular to an open-section tunnel structure combined with cast-in-place and prefabricated assembly. Background technique [0002] At present, the open sections of domestic urban road tunnels or the ground entry and exit sections of subway tunnels all adopt U-shaped structures, which are open-cut and all-cast-in-situ construction. [0003] Due to the long maintenance time of cast-in-place construction, the noise generated by concrete vibration has a great impact on surrounding residents. In China, open-cut precast assembly technology is being studied to completely replace or partially replace cast-in-place operations. [0004] The patent [201410136710.7] discloses an open-cut prefabricated underground structure, which is only a tunnel buried section structure. There is no public report on the prefabricated assembly technology of the open section in China. In the urban un...

AI Technical Summary

Problems solved by technology

[0006] 1. There are many cast-in-place operations, a large amount of steel bar binding, the structure needs on-site maintenance, and the construction period is long

[0007] 2. There is a large amount of on-site work, and the quality of structural construction is greatly affected by external influences such as people and weather

[0008] 3. The investment in pumping concrete vehicles is large, which affects the surrounding road traffic

[0009] 4. There are many vibrating operations, and the vibration noise has a great impact on the lives of surrounding residents

[0010] 5. A large amount of personnel, materials, and machinery are invested, and there are many risk sources that affect construction safety

[0011] 6. There is a large amount of steel bar stacking and material storage, and the temporary construction area is large

Images