3 results about "Circular arch" patented technology

This utility model provides a protective device for outdoor electrical cabinets, relating to the technical field of protective devices. It includes an electrical cabinet with two sets of openings (top and bottom). Supporting members are located at the four corners of the bottom of the cabinet, each member being a downward-opening semi-circular arch. Inner corner frames are provided at the internal corners of the cabinet, and outer corner frames are provided at the external corners. An opening frame is provided at the front opening of the cabinet. This utility model can prevent the electrical cabinet from becoming damp and deformed due to rainwater intrusion, as well as from being corroded, thus preventing it from affecting its quality and lifespan. It can also prevent prolonged exposure to sunlight, preventing damage to the electrical components inside the cabinet. This solves the problem of existing electrical cabinets lacking protective devices and being easily corroded.

This invention discloses a tunnel boring machine (TBM) and a device for excavating a tunnel with a quasi-circular arch and straight wall cross-section, as well as a construction method. The device includes a TBM main unit, a rock cutter with a rounded corner, a rear-mounted trailer, a muck removal system, and a cutting machine support system. The TBM main unit is installed at the front of the excavation device, and the cutting machine support system is installed at the rear. The TBM main unit and the cutting machine support system are connected via the rear-mounted trailer. The rock cutter with a rounded corner is mounted on the cutting machine support system and is used to cut the tunnel under the control of the cutting machine support system. The TBM main unit, the cutting machine support system, and the rear-mounted trailer all have muck removal systems installed inside. The construction method includes three processes: excavation, step switching, and muck removal. This invention offers high forming efficiency, a short construction cycle, and more flexible rock cutting capabilities, adapting to rocks of different areas and sizes. Furthermore, the excavation and step switching processes of the TBM main unit and the rock cutter with a rounded corner are independent and do not interfere with each other. The structure is simple and the cost is low.

The application belongs to the technical field of tunnel construction, and particularly relates to a tunnel crossing active fault multi-arch anti-fault system. In the tunnel crossing active fault multi-arch anti-fault system, the tunnel assembly is limited by the transverse constraint hinge and cannot displace transversely in the overbreak space, but can only move up and down in the vertical plane of the overbreak space. The multi-arch structure at the bottom of the tunnel assembly comprises a semicircular arch frame and a plurality of sequentially connected circular arch frames. The cooperation of the semicircular arch frame and the circular arch frame can effectively support the tunnel assembly and play a certain buffering role to absorb and dissipate the fault displacement generated when the surrounding rocks on both sides of the active fault relatively displace, so that the actual fault displacement of the tunnel assembly is significantly lower than the actual fault displacement of the surrounding rocks on both sides of the active fault, thereby greatly reducing the influence of the fault displacement of the surrounding rocks on both sides of the active fault on the tunnel assembly and improving the stability and safety of the tunnel assembly.