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A kind of self-balancing back pressure bridge single bearing replacement method

A technology of bridge support and bridge single, which is applied in the direction of bridges, bridge maintenance, bridge reinforcement, etc., and can solve the problems of long construction period, difficulty in reducing construction costs, and wide range of traffic influences.

Active Publication Date: 2016-01-06
刘其伟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, because individual supports on the same pier (platform) need to be replaced, all the beams on the pier (platform) need to be jacked up simultaneously, resulting in a large amount of jacking work
In this method of replacing the support, although the number of support replacements is small, the construction cost is difficult to reduce due to the heavy lifting workload
Therefore, the owner is often caught in the dilemma of "replacing or not replacing" a small number of diseased supports
The reason is that for multi-girder bridges (multiple girders in the cross-bridge direction of the same pier), using the current conventional synchronous jacking technology to replace a small number of supports has high construction costs, long construction periods, and a wide range of traffic influences. Unavoidable disadvantages of synchronous jacking

Method used

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  • A kind of self-balancing back pressure bridge single bearing replacement method
  • A kind of self-balancing back pressure bridge single bearing replacement method
  • A kind of self-balancing back pressure bridge single bearing replacement method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0125] Example 1: Replacement of self-balancing counter-pressure single support—combined

[0126] The implementation steps of this embodiment are as follows:

[0127] A. Leveling treatment

[0128] Carry out inspection and investigation on the bridge bearing disease, including the investigation of the diseased bearing, determine the type of disease, the plane geometric size of the bearing pad stone, the flatness of the beam body, etc., and determine the severity of the bearing disease;

[0129] Clean up the garbage at the beam end, release the excess constraints at the beam end, and take out the completely empty plate rubber bearing;

[0130] Use manual methods or low-power machinery to chisel out the pad stone of the empty support, and avoid damage to the main beam and platform cap during the chiseling process;

[0131] B. Install and update the support

[0132] Use structural glue to level the bottom of the beam above the support position. The plane size of the leveling ...

Embodiment 2

[0153] Example 2: Replacement of self-balancing back pressure type single support - three-point type (mechanical type)

[0154] The implementation steps of this embodiment are as follows:

[0155] Carry out according to the embodiment identical with embodiment 1, just use as the specification attached to this application diagram 2-1 and Figure 2-2 The shown three-point (mechanical) jacking support device, the structure of the three-point jacking support device is as follows:

[0156] Arrange a three-screw support device on the outer edge of the support to be replaced, and set a rectangular steel plate with a thickness of 1 to 2 cm with three screw holes on the top, place the new support to be replaced on the top surface of the steel plate, and adjust the height of the screw support. The support to be replaced is closely attached to the bottom of the beam.

[0157] A to C in Example 1 are also applicable to this process. After the monitoring equipment is installed, use a c...

Embodiment 3

[0163] Example 3: Replacement of self-balancing back pressure type single support - four-point type (mechanical type)

[0164] The implementation steps of this embodiment are as follows:

[0165] Carry out according to the embodiment identical with embodiment 1, just use as this description appended Figure 3-1 and Figure 3-2 The shown four-point (mechanical) jacking support device, the structure of the four-point jacking support device is as follows:

[0166] Arrange a four-screw support device on the outer edge of the support to be replaced, set a rectangular steel plate with a thickness of 1 to 2 cm with four screw holes on the top, place the new support to be replaced on the top surface of the steel plate, and adjust the height of the screw support. Make the support to be replaced fit closely with the bottom of the beam.

[0167] The operation mode of embodiment 3 is basically the same as that of embodiment 2, but the difference from embodiment 3 is that the order of t...

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Abstract

The invention relates to a method for replacing a self-balancing backpressure type bridge single-support. The method mainly comprises the construction steps of leveling, installation and updating of the support, installation of a monitoring device, application of pre-pressure, locking of a jacking supporting device, pouring of a support cushion stone and the like. By means of the method, a new support can not become empty or shift under the effect of a live load in a later period after bearing dead-load pre-pressure, and it is guaranteed that a beam body at the support can not be subjected to forced displacement at the same time, so that generation of additional internal force between a cross bridge and the beam body is avoided, and sufficient emergency capacity is reserved; in the whole construction process of support replacement, operation is easy and convenient, and almost no influence is imposed on structural safety of the bridge; the construction process of single-support replacement is simplified to the maximum extent, construction cost is saved, and extremely high economic benefits are obtained.

Description

【Technical field】 [0001] The invention belongs to the technical field of maintenance, repair and construction of small and medium-span bridges. More specifically, the present invention relates to a method for replacing a self-balancing counter-pressure bridge single support. 【Background technique】 [0002] The support is the connection point between the upper and lower structures of the bridge. Its function is to transfer the load of the upper structure of the bridge to the bridge pier smoothly and safely, and at the same time ensure the stability of the upper structure under the influence of factors such as load, temperature change, and concrete shrinkage and creep. Free deformation, and protect beams and piers from damage. [0003] During the routine inspection, regular inspection and special inspection of bridges, it is found that bearing diseases are very common. Among them, the defects of plate rubber bearings of small and medium-span bridges are particularly prominen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01D22/00
Inventor 刘其伟罗文林王成明杨鹏肖鹏
Owner 刘其伟
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