Highway bridge prestressed concrete slab beam external prestressed reinforcement structure and method
A concrete slab and external prestressing technology, applied in bridge reinforcement, bridges, bridge materials, etc., can solve problems such as reinforcement of simply supported slabs and beams of unprestressed concrete, and achieve the effects of good passability, short cycle and fast construction
Pending Publication Date: 2020-06-05
FUZHOU UNIV
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Problems solved by technology
[0004] The purpose of the present invention is to provide a road bridge prestressed concrete slab girder external prestressing reinforcement structure and method, the reinforcement structure and method can solve the problem that conventional external prestressing cannot be applied to prestressed concrete simply supported slab girder reinforcement
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[0028] In order to make the above-mentioned features and advantages of the present invention easier to understand, the following specific embodiments are described in detail with reference to the accompanying drawings, but the present invention is not limited thereto.
[0029] refer to Figure 1 to Figure 3
[0030] An external prestressed reinforcement structure of prestressed concrete slab girder of a highway bridge, comprising a slab structure layer 1, on which a slab asphalt layer and a pavement layer 2 are arranged, in order to facilitate the insertion of anchor components, the slab structure layer Slots are made above the anchorage areas at both ends of the body structure layer, that is, slots 9 are respectively arranged on the anchorage areas at both ends of the asphalt layer of the slab body and the pavement layer, and a tensioning mechanism is arranged in the two slots to realize the external tension of the slab body structure layer. Anchor components for prestressed...
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The invention relates to a highway bridge prestressed concrete slab beam external prestress reinforcing structure and method. The structure comprises a plate body structure layer, a plate body asphaltlayer and a pavement layer are arranged on the plate body structure layer, open grooves are formed in anchoring areas at the two ends of the plate body asphalt layer and the two ends of the pavementlayer respectively, and anchoring assemblies for achieving external prestress reinforcement of the plate body structure layer through a tensioning mechanism are arranged in the two open grooves. The reinforcing method comprises the steps that an asphalt layer and a pavement layer above a plate body anchoring area are grooved to a structural layer, anchors are arranged at the two ends of a plate body, a base plate and an anchorage device are placed, and a 45-degrees inclined hole leading to the bottom of the plate is formed in the structural layer below the base plate; a steering gear is arranged at the plate bottom inclined hole steering position; the two ends of the steel strand penetrate through the two inclined holes through steering gears to be fixedly connected with the anchorage device. After the steel strand is connected with the anchorage device, the two ends of the steel strand are tensioned. The reinforcing structure and method can solve the problem that conventional externalprestress cannot be applied to reinforcement of the prestressed concrete simply-supported plate girder.
Description
technical field [0001] The invention relates to an external prestressed reinforcement structure and method of a prestressed concrete slab girder of a highway bridge. Background technique [0002] In recent years, with the rapid increase of traffic volume in our country, the increasing traffic density and vehicle load have brought many hidden dangers to the bearing capacity of bridges, making the structural damage of prestressed concrete bridges more serious. Secondly, the impact and impact of the lower part of the uplink bridge on the bottom plate caused concrete cracking and collapse, and the prestressed steel strands were broken. The occurrence of this situation caused almost irreparable damage to the bridge; among them, the prestressed concrete bridge structure in During its entire service period, due to the influence of factors such as stress relaxation, corrosion, slippage and anchorage deformation of the prestressed steel strands, the effective prestress of the prestre...
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Login to View More IPC IPC(8): E01D22/00E01D101/28
CPCE01D22/00E01D2101/28
Inventor 王黎园沈圣
Owner FUZHOU UNIV