5 results about "Arch height" patented technology

The embodiment of the utility model discloses a device and a system for testing the curvature radius of curved glass. The device comprises a test board, an arch height measuring assembly and a moving assembly, a middle area for placing curved glass is arranged at the center of the test board; the arch height measuring assembly is arranged above the middle area and is used for measuring the distance from the central vertex position of the curved glass to the arch height measuring assembly; the moving assemblies are arranged on the periphery of the middle area and located in the first direction and the second direction, the first direction is the chord length direction of the curved glass, and the second direction is perpendicular to the chord length direction of the curved glass; the moving assembly is in sliding connection with the test board and used for abutting against and pushing the curved glass so that the center of the curved glass can coincide with the center of the test board. The curvature radius testing device of the curved glass has the advantages of being simple in testing operation, high in testing efficiency and small in testing error.

The invention discloses an adaptive adjustment temporary supporting structure of a variable cross-section water delivery tunnel and a construction method of the adaptive adjustment temporary supporting structure. Comprising a temporary support, columns on two sides of the temporary support are connected with an upper fixed beam and a lower fixed beam through hinged supports and provided with an upper movable beam and a lower movable beam which can slide, and the end of the upper fixed beam can be driven to ascend and descend by adjusting the length of a pull rod connected between the upper movable beam and the lower movable beam. The arched support is formed by hinging a first support and a second support to an upper fixed beam and is connected with the first support and the second support through an inhaul cable. During construction, the supporting frame and the arch-shaped support are installed firstly, then the outline of the arch-shaped support is matched with the tunnel section by adjusting the inhaul cables, and finally the supporting height fine adjustment and close attachment are achieved by adjusting the pull rods. Through the synergistic effect of the openable arch support and the adjustable lever mechanism, flexible and accurate adaptation of the arch height and the contour of the variable cross-section tunnel is achieved, and the structure is stable.

This utility model discloses a corner support device for the arched formwork of the secondary lining of a mined tunnel, comprising: an upper support component including a U-shaped top support with a screw rod below it and an adjustable support rod rotatably mounted on the screw rod; a lower support component including a diagonal support rod, which is tubular, with its upper end set as a horizontal plane and its lower end set as a slope; and a vertical connecting fastener with a vertical rod inside. The adjustable support rod of this utility model is rotatably mounted on the screw rod through its internal threaded connecting part, achieving precise adjustment of the support height, adapting to the construction needs of different arch heights, and reducing the risk and difficulty of repeated high-altitude adjustments.

The application discloses a kind of combined beam cable-stayed bridge girder tensile stress reduction control construction methods, comprising the following steps: S1, the pre-arch height theoretical value of each section steel beam is calculated, and each section steel beam reaches corresponding pre-arch height before assembly;S2, each section steel beam is pushed to design position using push method, and steel girder installation is completed;Each section steel beam is supported by temporary buttress;S3, from small mileage to large mileage direction, deck is installed in block;S4, the concrete is poured at the wet joint between adjacent two deck panels;S5, deck prestressed construction: tensioning the prestressed steel strand in each deck panel, completing girder construction;S6, each cable is installed, and each cable on both sides of bridge is sequentially symmetrically tensioned from far tower end to near tower end.The application can effectively reduce the tensile stress of girder concrete, and guarantee the durability of bridge structure.

This invention discloses a rapid installation method for a large-span, double-limb combined tensioned beam structure, belonging to the field of steel structure installation and construction technology. The invention involves processing the tensioned beam as a whole in the workshop and then segmenting it at 1 / 3 and 2 / 3 of its length before transporting it to the construction site. One of the steel columns is cut into a column head and a column body below the column top. The column head and the tensioned beam's ear plate unit are then assembled on the ground using pins. The beam is assembled into a whole according to the designed arch height, and an infrared monitoring system is used to control the assembly accuracy in real time. Temporary fixing measures, such as positioning baffles, are set at the joint between the column head and the column body. After the tensioned beam is hoisted into place, the pins are connected, and then the column head and column body are welded together. This invention, through ground assembly, precise infrared monitoring, temporary positioning, and delayed ear plate welding, effectively eliminates hoisting deformation and installation deviations, increases the first-pass perforation rate of the pins, avoids the risk of enlarged holes, and significantly improves installation efficiency and structural safety.