A prefabricated assembled arch rib of ultra-high performance concrete and its manufacturing and installation method
An ultra-high performance, concrete technology, used in arch bridges, bridge forms, erection/assembly of bridges, etc., to achieve the effect of expanding the scope of application, reducing the requirements of geological conditions, and improving corrosion resistance
Active Publication Date: 2016-05-18
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology
[0004] There is currently no method for fabricating prefabricated rib-arch bridges using ultra-high performance concrete
Method used
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[0018] Such as figure 1 As shown, the rib arch bridge includes piers 1 and arch ribs. Pier 1 is made of ordinary concrete, and the arch rib is made of ultra-high performance concrete. The arch ring in the figure is composed of two separated arch ribs. The arch ribs are hoisted and assembled by cables. Towers 3 of a certain height are erected on both piers, and main cables 4 are anchored on corresponding piers 1 . Before hoisting the arch rib prefabricated component 2, first clean up the stains and sundries on the concrete surface of the component, apply epoxy resin glue on the interface of the arch rib prefabricated component 2 and the reserved hole 10, and then install the arch rib prefabricated component 2 in sequence Carry out symmetrical hoisting in place.
[0019] The inventive method comprises the following steps:
[0020] ① Concrete mix design. The water-cement ratio is 0.16-0.22, the sand-cement ratio is 0.8-2.0, and the ratio of cement: silica fume: finely ground...
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Abstract
The invention discloses an ultrahigh-performance-concrete arch rib and a prefabricated component manufacturing method thereof. Ultrahigh-performance concrete is adopted to manufacture arch rib prefabricated components, and the arch rib prefabricated components are spliced to be the arch rib. An arch ring is composed of two separated arch ribs, the arch rib prefabricated components are connected by adopting single-step-type glued joints, multiple reserved holes are formed at one end of each arch rib prefabricated component, and multiple connecting rods matched with the reserved holes in size are fixed at the other end of each arch rib prefabricated component. Before hoisting, sufficient epoxy resin is smeared on arch rib prefabricated component ports, the reserved holes and the connecting rods; during hoisting, the connecting rods at one end of one of each two arch rib prefabricated components are inserted into the reserved holes at one end of the other arch rib prefabricated component. By the method, quick assembling of the arch ribs within short time can be guaranteed, and construction quality of the arch ribs and durability of a whole bridge are ensured.
Description
technical field [0001] The invention relates to the technical field of structural engineering in the wood engineering industry, in particular to a prefabricated assembled arch rib of ultra-high performance concrete and a method for manufacturing and installing the same. Background technique [0002] Compared with the cast-in-place construction technology, the assembled rib-arch bridge has the advantages of large-scale prefabrication, convenient transportation and installation, short construction period, less average labor consumption, and easy to guarantee construction quality, especially for high-strength concrete. For the arch bridge across the reservoir, the water level of the river is at a high level for a long time, it is inconvenient to control the river water, and the river cannot be cut off for a long time, and the pouring-in-place construction period is long. , and the construction quality cannot be guaranteed. [0003] High-performance concrete, especially ultra-h...
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IPC IPC(8): E01D19/00E01D4/00E01D21/00C04B28/04
Inventor 蒋田勇田仲初陈福焕
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY