Hollow slab bridge comprehensive reinforcing system based on UHPC and retard-bonded steel strands and construction method of hollow slab bridge comprehensive reinforcing system
A technology of hollow slab bridges and steel strands, which is applied in the direction of bridge reinforcement, bridges, bridge parts, etc., can solve problems such as loose connection of beams and slabs, depending on the degree of cleanliness, and corrosion of steel components, so as to improve lateral integrity and avoid stress Complexity, the effect of improving the bending load capacity
Pending Publication Date: 2021-04-09
ZHEJIANG COMM CONSTR GRP CO LTD
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Problems solved by technology
However, there are still some problems in terms of practical application effects. For example, the treatment effect of joint grouting depends on the cleanliness of the joint, and the effect is limited for heavy-duty traffic; steel members often face corrosion of steel components, and the connection with the beam and slab is loose. and other issues; the loss of prestress in the operation stage after transverse prestress reinforcement is still to be discussed; pavement strengthening and hinge joint redoing are relatively good ways to deal with the force effect of veneer, and at the same time, they have a great impact on traffic , there is a greater security risk
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[0028] Such as Figure 1-2 As shown, a comprehensive reinforcement system for hollow slab bridges based on UHPC and slowly bonded steel strands includes several hollow slabs 1, hinge joints 2 are formed between adjacent hollow slabs 1, and formwork 10 is installed at the bottom of hollow slabs 1. The formwork 10 is equipped with a steel skeleton assembly, and a UHPC cast-in-place layer 8 is poured in the formwork 10, and a grouting pipe 7 is inserted into the joint 2, and the grouting pipe 7 extends into the formwork 10; the present invention belongs to a comprehensive reinforcement system for hollow slabs , improve the flexural bearing capacity of the hollow slab itself through the good tensile properties of the UHPC cast-in-place layer, and at the same time improve the lateral integrity of the hollow slab bridge through the UHPC cast-in-place layer and transverse tension prestress.
[0029] Specifically, if there is cracking and water seepage in the hinge joint 2 between adj...
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The invention relates to a hollow slab bridge comprehensive reinforcing system based on UHPC and retard-bonded steel strands and a construction method of the hollow slab bridge comprehensive reinforcing system. The hollow slab bridge comprehensive reinforcing system comprises a plurality of hollow slabs, hinge joints are formed between the adjacent hollow slabs, a formwork body is assembled at the bottoms of the hollow slabs, a steel reinforcement framework assembly is mounted on the formwork body, a UHPC cast-in-place layer is poured in the formwork body, grouting pipes are inserted in the hinge joints, and the grouting pipes extend into the formwork body. The invention belongs to a comprehensive reinforcing system of a hollow slab, the bending resistance and bearing capacity of the hollow slab are improved through the good tensile property of the UHPC cast-in-place layer, and meanwhile, the transverse integrity of a hollow slab bridge is improved through the UHPC cast-in-place layer and transverse tensioning prestress.
Description
technical field [0001] The invention belongs to the technical field of bridge maintenance and reinforcement devices, and in particular relates to a comprehensive reinforcement system for hollow slab bridges based on UHPC and slowly bonded steel strands and a construction method thereof. Background technique [0002] Hollow slab girders are widely used in medium and small-span bridges of various grades of highways because of their advantages such as simple prefabrication, convenient installation, low cost and small building height. Most of the hollow slabs built in the early stage are small hinged structures, which are vulnerable components of hollow slabs. The damage of hinged joints usually manifests as joint cracking and water seepage, reflection cracks in bridge deck pavement, and even single-slab stress, which seriously affects the hollow slab. The operational safety and service life of the bridge. [0003] For the hinge joint disease of hollow slab bridges, depending o...
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IPC IPC(8): E01D22/00E01D19/00E01D101/26
CPCE01D19/00E01D22/00E01D2101/26
Inventor 程坤杜引光凌之涵吴强强刘漳任智勤黄考取孙沪许文煜黄岳斌
Owner ZHEJIANG COMM CONSTR GRP CO LTD