A kind of reinforcement method of post-tensioning cable
A force cable and pre-tightening force technology, which is applied in the field of post-tensioning cable reinforcement, can solve the problems of inconvenient construction, inconspicuous reinforcement effect, and high reinforcement cost, achieving low reinforcement cost, controllable application process, Practical effect
Inactive Publication Date: 2016-06-08
BEIJING JIAOTONG UNIV
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Problems solved by technology
Traditional technology has high reinforcement cost, inconvenient construction, and inconspicuous reinforcement effect
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[0023] refer to Figure 1-4 Examples of the present invention will be described.
[0024] In order to make the above objects, features and advantages more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0025] The concrete description will be given below by taking bridge reinforcement as an example, but the present invention is not limited to the application of bridge reinforcement.
[0026] The post-adding pretensioning force cable reinforcement method of the present invention, the method is: firstly set the ground anchor system 2 for fixing the cable 5 at an appropriate position on the ground; on the connecting key 23 of the ground anchor system 2 Install the device 4 for applying pre-tightening force; install the sleeve 3 for fixing the cable 5 at an appropriate position on the upper part of the pier 1; fix the upper end of the cable 5 on the sleeve 3, and fix the lowe...
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The invention discloses a post-added pre-stress cable strengthening method which includes the following steps: arranging a plurality of ground anchor systems for fixing cables on the periphery of a component to be strengthened, installing devices for exerting stress on connection keys of the ground anchor systems, arranging sleeves for fixing the cables on proper positions of the upper portion of the component to be strengthened, fixing the upper ends of the cables on the sleeves, fixing the lower ends of the cables on the devices for exerting stress, screwing nuts on the stress exerting devices to exert stress on the cables, enabling stress cables to generate down force on piers. The post-added pre-stress cable strengthening method can be used for urgent and fast strengthening of the piers, and also can be used for permanent strengthening of the piers. The exerting process is controllable, easy to practice and adjustable in later stage. Strengthening cost of the piers is low, and no damage exists for an original bridge structure. Practicability is strong, strengthening structure is convenient and simple, strengthening effect is obvious, and the like.
Description
technical field [0001] The invention relates to the field of mechanical technology, in particular to a reinforcement method for post-applied pre-tightening force cables. Background technique [0002] The vibration of the bridge structure is usually divided into the vibration of the upper girder structure and the vibration of the lower pier structure. In the past, the vibration of the eccentric beam structure was studied, but the influence of the pier abutment was ignored. However, for bridges with high piers, light piers, or bridges with weak foundation stiffness, the vibration of bridge piers has a greater impact on the overall structure. [0003] At present, the speed of railway lines continues to increase, and the density of trains has increased sharply. Many existing bridges have large lateral vibrations at the top of the pier due to factors such as relatively large pier slenderness, weak transverse direction, or shallow foundation embedding, which can no longer guarante...
Claims
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IPC IPC(8): E01D22/00E01D19/16
Inventor 周长东张葆妍潘庆龙王京京
Owner BEIJING JIAOTONG UNIV