Full face tunnel boring machine concrete spraying device

Abstract

The invention belongs to the technical field of concrete support and protection of tunnels dug by a full face tunnel boring machine, in particular to a full face tunnel boring machine concrete spraying device, which comprises a spouting head, a spouting mechanical hand telescopic arm frame assembly, an annular spouting slide frame assembly, a spouting mechanical hand peripheral rotating device and a spouting slide frame longitudinal moving device, wherein the spouting mechanical hand telescopic arm fame assembly is arranged in the longitudinal direction of the tunnel, the spouting head is arranged on the spouting mechanical hand telescopic frame assembly, the spouting mechanical hand telescopic frame assembly is fixedly connected with the spouting mechanical hand peripheral rotating device through a connecting plate, a large gear ring of the spouting mechanical hand peripheral rotating device is fixedly arranged at the inner side of a slide frame of the spouting slide frame assembly, and the spouting slide frame longitudinal moving device is transversely arranged at the lower part of the spouting slide frame assembly through a connecting plate. The full face tunnel boring machine concrete spraying device has the advantages that the design is reasonable, the timely fast proceeding can be realized after shield exposure during tunnel digging, the spouting support and protection can be timely performed on the inner surface of a tunnel in an unstable stratum or when a crushed zone is passed, the surrounding rock convergence is effectively prevented, the personnel safety is ensured, in addition, the parallel operation of tunnelling, steel bar net hanging, anchor rod beating, steel arch frame erecting and concrete support and protection spraying in the tunnelling process can be realized, and the work efficiency of the primary support and protection can be comprehensively improved.

Description

technical field [0001] The invention belongs to the technical field of concrete support for tunnels excavated by a full-section tunnel boring machine, and in particular relates to a sprayed concrete device for a full-section tunnel boring machine. Background technique [0002] During the construction process of the full-face hard rock roadheader, concrete needs to be sprayed in time to stabilize the rock mass after excavation. The concrete injection system should be arranged as far forward as possible to facilitate early and rapid support. Therefore, the concrete injection system is arranged on the shotcrete bridge behind the main engine and in front of the supporting trailer. However, due to the large spray volume and long spray stroke of many concrete spraying systems at present, it is easy to cause the concrete pipeline connected to the sprinkler to swing a lot during the forward movement process, resulting in serious wear of the pipeline and the vibration of the sprayed ...

AI Technical Summary

Problems solved by technology

However, due to the large spray volume and long spray stroke of many concrete spraying systems at present, it is easy to cause the concrete pipeline connected to the sprinkler to swing a lot during the forward movement process, resulting in serious wear of the pipeline and the vibration of the sprayed material. The impact of the rebound is large, increasing the pollution in the tunnel and increasing the workload of slag cleaning; at the same time, when the spraying platform is fixed, th

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