Anti-seismic reinforcing method for bridge transverse check block
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A stopper and transverse technology, which is applied in the field of seismic reinforcement of bridge transverse stoppers, can solve problems such as weak lateral restraint ability of stoppers, and achieve the effects of short construction period, reduced damage, and high elastic modulus
Inactive Publication Date: 2020-02-11
XIANGTAN UNIV
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[0005] The invention proposes a brand-new bridge transverse anti-seismic block for the situation that the bridge transverse anti-seismic block is damaged but the damage of other components does not affect the normal use of the structure, or the original block is too weak due to the weak design of the block lateral restraint ability. The anti-seismic reinforcement method of the block is to make up for the deficiencies of the existing anti-seismic reinforcement methods and technologies of the block
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Embodiment 1
[0042] like Figure 4 , Figure 5 , Figure 9 Shown, a kind of anti-seismic strengthening method of bridge transverse stopper, in this embodiment, the method for quick anti-seismic reinforcement and repair after bridge transverse stopper damage. It is suitable for damaged stoppers 7 where common failures such as oblique shear failure, bending shear failure, and flat shear failure occur.
[0043] The seismic reinforcement method for the transverse block of the bridge includes the following steps:
[0044] S1, reset the laterally displaced main girder 3 and replace the bridge support 9
[0045] S2, cutting off the damaged transverse block 7 on the existing cover beam 2, and performing overlay treatment on the cut surface;
[0046] S3, design and prefabricate a new anti-seismic block assembly 1, and hoist it to the two ends of the existing cover beam 2 for positioning;
[0047] S4, the splicing of the new anti-seismic block assembly 1 and the existing cover beam 2 is realize...
Embodiment 2
[0067] like Image 6 , Figure 7 , Figure 9 As shown, an aseismic reinforcement method for a bridge transverse block, in this embodiment, is suitable for the case where the designed weak block 8 is too weak in lateral restraint capacity.
[0068] An anti-seismic reinforcement method for a bridge transverse stopper is characterized in that it comprises the following steps:
[0069] S1, check whether the main beam 3 is displaced and whether the support 9 is damaged. If the main beam is displaced, reset the main beam 3 and replace it.
[0070] Change the support 9;
[0071] S2, cutting off the weakly designed transverse stopper 8 on the cover beam 2, and performing overlay treatment on the cut surface;
[0072] S3, design and manufacture a new anti-seismic block assembly 1, and hoist it to the two ends of the existing cover beam 2 for positioning;
[0073] S4, realizing the splicing of the new anti-seismic block assembly 1 and the existing cover beam 2 by stretching the ext...
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Abstract
The invention discloses an anti-seismic reinforcing method for a bridge transverse check block. The anti-seismic reinforcing method is suitable for quick seismic resistance reinforcing and repairing after the bridge transverse check block is suffered from seismic damage. According to the technical scheme, the anti-seismic reinforcing method comprises the following steps that firstly, a main beam moved transversely is restored, and bridge supports are replaced; secondly, the damaged transverse check block is cut off on an existing cover beam, and top facing processing is carried out on the cut-off face; thirdly, new anti-seismic check block assembling parts are designed and manufactured and hoisted to the two ends of the existing cover beam to be positioned; fourthly, splicing of the new anti-seismic check block and the existing cover beam is achieved by tensioning outer prestress steel bars; and fifthly, anti-corrosion and anti-rusting treatment is carried out on the external prestresssteel bars, an anchoring system and the like. By means of the anti-seismic reinforcing method, quick repair of the check blocks after seism can be carried out under the premise of not damaging the existing cover beam, and the method is suitable for anti-seismic reinforcing of various check blocks of domestic small and medium span bridges; and the method is simple in construction process, short infield operation time and good in anti-seismic reinforcing effect.
Description
technical field [0001] The invention belongs to the field of anti-seismic technology of bridges, and in particular relates to an anti-seismic reinforcement method for a bridge transverse block. Background technique [0002] At present, with the rapid development of my country's national economy, the intensity of transportation construction continues to increase, and a large number of road and railway bridges have been built, among which small and medium-span reinforced concrete beam bridges account for the largest proportion. [0003] Most of the small and medium-span reinforced concrete beam bridges in my country adopt directly shelved slab rubber bearings, that is, there are no anchoring measures between the upper surface of the bearing and the bottom of the beam and the cover beam, and the main girder will produce large damage under strong earthquake action or the impact of super-high vehicles. The lateral horizontal displacement of the bridge needs to be set up with bridg...
Claims
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