External pre-stressed anchoring device for concrete bridge body and rapid strengthening method
An external prestressing and anchoring device technology, applied in bridge reinforcement, bridge, bridge maintenance, etc., can solve the problems of long construction period, small external prestressing, complex construction process, etc. , The effect of simple installation process
Active Publication Date: 2014-01-15
SHIJIAZHUANG TIEDAO UNIV
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Problems solved by technology
In the field of external prestressed bridge reinforcement, concrete anchor blocks are usually planted on existing beams. The disadvantages of this anchor method are: complex construction technology, long construction period, large and heavy volume, and cannot meet the requirements of rapid reinforcement construction; Shear failure is prone to occur between the concrete anchor block and the original bridge concrete interface; the difference in performance between the old and new concrete can easily cause shrinkage and creep cracks
[0006] Although most of the existing steel anchoring devices can be flexible, light, and easy to install quickly, most of the anchoring devices are connected to the bridge through organic adhesives, anchor bolts or high-strength expansion bolts, organic adhesive bonding, anchor bolts or high-strength expansion bolts The maximum load that the expansion bolt can bear is limited, and the external prestress provided is small. It is suitable for the restoration of the bearing capacity of existing bridges, and is not suitable for the reinforcement of bridges that have higher requirements for bearing capacity.
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[0026] as attached figure 1 , 2 , 3, and 4, the anchoring device of the present invention includes two groups of structurally symmetrical anchor blocks arranged on both sides of the concrete bridge body 11, wherein the left anchor block 13 and the right anchor block 15 arranged at both ends of the concrete bridge body 11 The structure is symmetrical, the left anchor block 13 and the right anchor block 15 are provided with an anchor cable 10 through a fork-ear anchorage, and the two ends of the anchor cable 10 are provided with a fork-ear anchorage, on the anchor cable 10 A diverter 12 is provided, and the left anchor block 13 is structurally symmetrical to the anchor block 14 disposed on the other side of the concrete bridge body 11. The left anchor block 13 includes a bottom plate 1 and a connecting plate fixed on the bottom plate 1 2. Fix the ear plate 3 on the connecting plate 2, one end of the connecting plate 2 is provided with a semicircular groove that can be inserted ...
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The invention relates to an external pre-stressed anchoring device for a concrete bridge body and a rapid strengthening method. The anchoring device comprises two anchoring pieces with symmetrical structures, wherein the anchoring pieces are arranged at two sides of the concrete bridge body; an anchor cable is arranged between the left anchoring piece and the right anchoring piece; a steering gear is arranged on the anchor cable; each anchoring piece comprises a base plate, connection plate fixedly arranged on the base plate and an ear plate fixedly arranged on the connection plate; a half-round groove is arranged at one end of the connection plate; and a baffle is arranged on a pin hole. The strengthening method provided by the invention comprises the following steps of: anchoring piece processing, bridge body polishing, installing, glue pouring and tensioning. The device and the method which are provided by the invention have the advantages that: the installation process is simple and rapid; the traffic needs not to be interrupted during installation; the construction period of installing the device provided by the invention is short; and the volume of the device is small and the device is flexible to ensure that the requirements for rapid strengthening construction can be satisfied.
Description
technical field [0001] The invention relates to an external prestressed anchoring device and a rapid reinforcement method for a concrete bridge. Background technique [0002] At present, the concrete bridges in our country that have been in operation for many years have suffered from various damages. The bridge damage has accumulated continuously, and the bearing capacity has declined. The rapid development of existing transportation has made the original design bearing capacity of the bridge unable to meet the growing transportation needs. Therefore, without interrupting traffic It is very urgent to quickly strengthen the concrete bridge under the premise of the above conditions; domestic and foreign studies have shown that using external prestressing to strengthen the concrete bridge can restore and improve the bearing capacity of the bridge. [0003] Existing external prestressing reinforcement methods mostly use anchors to anchor the prestressed external cables on the br...
Claims
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IPC IPC(8): E01D22/00
Inventor杜彦良胡彦君王新敏
OwnerSHIJIAZHUANG TIEDAO UNIV