CN212956175U - Reinforcing structure of pedestrian bridge - Google Patents

Abstract

The utility model provides a reinforcing structure of a pedestrian bridge, which comprises a bridge body, wherein the bottom of the bridge body is provided with a pier, a bridge plate is arranged on the pier, the side surface of the bridge plate is upwards protruded with a limiting part, the reinforcing structure also comprises a bridge floor, the bridge floor is arranged on the bridge plate, the side surface of the bridge floor is butted with the limiting part, and the thickness of the bridge floor is smaller than the height of the limiting part; the pier is arranged along the cross-sectional direction of pontic, and the pier is equipped with 2 at least, and at the mutual symmetry in pontic bottom both sides, be equipped with the reinforcing bar in the pier, the skin is concrete layer, reinforcing bar in the pier and the steel bar connection on the bridge plate, paste multilayer carbon fiber cloth layer in pier bottom surface, carbon fiber cloth layer anchors carbon fiber cloth through the U-shaped hoop. This scheme waters a layer of concrete bridge face on the bridge slab, prescribes a limit to the position of bridge face through the spacing portion of shaft side, realizes renovating the bridge face, and the construction is simple, and extensive applicability is general, and the pier underrun hoop carries out the anchor with carbon cloth through U-shaped, further improves the resistance to compression, the shearing of pier, tensile strength.

Description

Reinforcing structure of pedestrian bridge

Technical Field

The utility model belongs to bridge building field, concretely relates to footbridge reinforced structure.

Background

At present, the pedestrian bridge can solve the problem of traffic jam and provide a channel for people to walk under various environments of cities, villages and docks, does not occupy useful space, and plays an important role in multiple aspects such as relieving traffic pressure. And convenience is provided for pedestrians passing through the road, so that the safety is guaranteed. However, the pedestrian bridges constructed in various environments are limited in function from design to construction until being put into use, and pedestrians can pass through roads safely.

However, in many areas at present, the pedestrian bridge is not repaired for a long time after being used for a long time, the problem that the bridge deck is perforated and the hollow is uneven is the most common, and the problems that the concrete of the bridge deck collapses, the reinforcing steel bars of the beam plate are exposed and the like can be further caused without overhauling, so that great potential safety hazards are caused, but some special places are not convenient for dismantling and building the bridge, the time and the construction cost for newly building the bridge are huge, so that the original pedestrian bridge is required to be improved and reinforced integrally, and the selection is carried out by combining with the corresponding occasions and the construction cost, so that the problem that the existing pedestrian bridge is not convenient for integrally reinforcing the bridge is solved.

SUMMERY OF THE UTILITY MODEL

The utility model discloses lie in to above-mentioned problem, improve a construction simply, the strong and pedestrian bridge reinforced structure of being convenient for construction of durability.

The utility model provides a reinforcing structure of a pedestrian bridge, which comprises a bridge body, wherein the bottom of the bridge body is provided with a pier, a bridge plate is arranged on the pier, the side surface of the bridge plate is upwards protruded with a limiting part, the reinforcing structure also comprises a bridge floor, the bridge floor is arranged on the bridge plate, the side surface of the bridge floor is pressed against the limiting part, and the thickness of the bridge floor is smaller than the height of the limiting part; the pier is arranged along the cross-sectional direction of bridge body, and the pier is equipped with 2 at least, at the mutual symmetry in bridge body bottom both sides, be equipped with the reinforcing bar in the pier, the skin is concrete layer, reinforcing bar in the pier and the steel bar connection on the bridge plate multilayer carbon cloth layer is pasted to the pier bottom surface, carbon cloth layer anchors carbon cloth through the U-shaped hoop.

The utility model discloses a reinforced structure to pedestrian bridge makes after long-time the use at the pontic, the pontic has more problem, and then passes through the utility model provides a technical scheme overhauls the bridge, consolidates, waters a layer of concrete bridge floor on the bridge slab on the pontic to spacing portion through pontic side is injectd the position of bridge floor, is filled one deck reinforced concrete bridge floor, renovates the bridge floor, and further renovates the bridge floor, and the construction is simple, and extensive applicability is general, pastes multilayer carbon fiber cloth layer in the bottom surface of pier, and anchor carbon fiber cloth through U-shaped hoop, further improve the compressive strength of pier, and make the tensile of pontic, shear, the ability of antidetonation promote.

Further, a structural reinforcing mesh is arranged in the bridge deck. The bridge deck is supported and qualified by constructing the reinforcing mesh in the bridge deck, so that the stability of the bridge deck is ensured.

Furthermore, 4 piers are arranged, and are arranged at equal intervals; the equal-interval arrangement of the bridge piers can ensure that the bridge body is more stably supported by the bridge piers, the stress is balanced, and the problem of overlarge stress on one side is avoided.

Furthermore, five circles of U-shaped hoops are adhered outside the carbon fiber cloth layer on the bottom surface of each pier, and a better anchoring effect is achieved when the carbon fiber cloth is bent and reinforced on the concrete beam.

Drawings

FIG. 1 is a cross-sectional view of a bridge deck of the reinforcing structure of a pedestrian bridge of the present invention;

FIG. 2 is a schematic structural diagram of a pier of a pedestrian bridge;

fig. 3 is a schematic plan view of a pedestrian bridge.

Detailed Description

The utility model discloses a footbridge reinforced structure is explained with the attached drawing.

Referring to fig. 1-3, the bridge comprises a bridge body 1, the bridge body 1 is used as a body of a pedestrian bridge, the bridge body 1 is improved and reinforced, a structure identical to that of the bridge body 1 can be newly built as the body of the pedestrian bridge, the bridge body 1 is used as a previously used bridge body and has a plurality of use marks such as perforations, hollows, scratches and the like, reinforcing steel bars are arranged inside the bridge body 1, concrete is poured outside the reinforcing steel bars, the bridge body comprises bridge piers 11 at the bottom and bridge slabs 12 at the upper layer, the bridge piers 11 are arranged along the cross section direction of the bridge body, the number of the bridge piers is 4, support is provided for the cross section direction of the bridge, and the bridge piers 11 are arranged at equal intervals and are symmetrical to each other at two sides of the bottom of the bridge body 1; the bridge pier 11 is arranged at equal intervals, so that the support of the bridge pier on a bridge body is more stable, the stress is balanced, the problem of overlarge stress on one side is avoided, the bridge plate 12 is a rectangular plane and is of a reinforced concrete structure, the constructional steel bars are all arranged in a crossed mode through three stages of steel bars, a limiting part 13 protrudes upwards from the side face, connected with the bridge pier, of the steel bar structure inside the supporting table, the limiting part 13 and the bridge deck 2 are equal to the bridge plate 12 in length and equal to the bridge plate in length, the bridge deck 2 further comprises a bridge deck 2, the bridge deck 2 is filled with glue on the bridge plate 12, the side face of the bridge deck 2 abuts against the limiting part 13, the thickness of the newly filled bridge deck 2 is smaller than the height of the limiting part 13, and a constructional steel bar mesh is arranged in the; the bridge deck is supported and qualified by constructing the reinforcing mesh in the bridge deck, so that the stability of the bridge deck is ensured; be equipped with the reinforcing bar in the pier, the skin is concrete layer, reinforcing bar in the pier 11 and the steel bar connection on the bridge plate multilayer carbon fiber cloth layer 14 is pasted to the bottom surface of pier 11, preferably pastes 5 layers of carbon fiber cloth, consider to choose the carbon fiber cloth of I level intensity 300 g/square meter, the thick specification of 0.167mm for use, need paste the effective cross sectional area that the three-layer just can satisfy the carbon fiber, in order to leave sufficient surplus, guarantee that the structure reinforces enough effective safety, consider to paste 5 layers of carbon fiber cloth of 0.167mm specification, the carbon fiber cloth layer is through U-shaped hoop 141 with carbon fiber cloth anchor, in carbon fiber cloth is in concrete beam bending reinforcement, play better anchor effect, further improve pier 11's compressive strength, and make the tensile of bridge body, shear, the ability of antidetonation promote, adopt carbon fiber cloth to have following advantage: the strength is high, the density is small, the thickness is thin, and the self weight and the section size of the reinforcing member are not basically increased; the method has wide application range, and is widely applicable to the reinforcement and restoration, the seismic reinforcement and the node structural reinforcement of various structural types and structural shapes such as bridges and tunnels of buildings. The construction is convenient, large-scale machines and equipment are not needed, wet operation is not needed, fire is not needed, on-site fixing facilities are not needed, the occupied area is small, the construction work efficiency is high, the durability is high, and the paint is not rusted and is very suitable for being used in high-acid, alkali, salt and atmospheric corrosion environments.

During construction, the pedestrian bridge is judged according to the current situation, and under the current situation, the bearing capacity of the right section of the pedestrian bridge does not meet the safety requirement. Aiming at the hidden trouble, the carbon fiber cloth is adhered to the bottom of the beam so as to increase the strength of the concrete structure and enable the bearing capacity of the right section to meet the safety requirement. Aiming at the phenomenon of rib leakage of the bottom surface of the bridge deck, the carbon fiber cloth is pasted after the concrete mortar is used for trowelling, so that the strength of the bridge deck is increased, and the pedestrian bridge structure is protected. The handrail is additionally arranged to protect the safety of pedestrians; when the unsatisfied safety requirement of bearing capacity that bends as original pedestrian bridge normal cross-section, the construction is hung in the reverse direction of this scheme consideration, erects I-shaped steel roof beam and anchor in pedestrian bridge both sides, and both sides support department sets up the hanging beam, builds construction platform board on the hanging beam, carries out the carbon cloth construction on construction platform. 5 layers of carbon fiber cloth (I-grade strength 300 g/square meter) with the width of 200mm and the thickness of 0.167mm are pasted on the bottom surface of each beam, 5 circles of U-shaped hoops (I-grade strength 300 g/square meter carbon fiber cloth) are pasted on the bottom surface of the bridge pier, the carbon fiber cloth at the bottom of the beam is anchored, and the carbon fiber cloth construction process comprises the following steps: unloading, bottom layer treatment, bottom layer resin coating, leveling construction surface, carbon fiber sheet adhesion, surface protection and decoration.

The construction process comprises the following specific steps: 1. unloading; the reinforced component should be relieved as much as possible before reinforcement. 2. Bottom layer treatment; the concrete should be chiseled off at the place where the peeling, hollowing, corrosion, etc. appear on the surface. The crack site is first subjected to a sealing treatment. Removing impurities such as laitance, oil stain and the like on the surface of the concrete by using machines such as a concrete angle grinder, abrasive paper and the like, polishing the surface of the member to be flat, polishing the convex part to be flat, and polishing the corner to be in a circular arc shape (R is more than or equal to 20 mm). And cleaning the surface of the concrete and keeping the surface dry. 3. Coating a bottom resin; the prepared bottom resin is metered and stirred uniformly, the dosage is determined according to the actual air temperature, and the service time is controlled; and (3) uniformly brushing the bottom resin on the surface of the concrete, and after the glue is cured (the curing time depends on the field temperature, and the finger touch drying is taken as the standard), carrying out the next procedure. 4. Leveling a construction surface; the concave parts on the surface of the component are filled by using leveling glue, and the parts with height difference are filled by using the leveling glue; the corner is also repaired into an arc shape by leveling glue, and the radius is not less than 10 mm. 5. Pasting; cutting the carbon fiber cloth according to the size and the layer number required by the design, wherein the length of the carbon fiber cloth is generally within 3m unless special requirements are met; blending the infiltration resin, uniformly coating the infiltration resin on the part to be adhered, and coating a plurality of portions such as lap joints, corners and the like; sticking the carbon fiber cloth, repeatedly rolling by using a roller to remove air bubbles, fully soaking the carbon fiber cloth by using the soaking glue, repeating the steps for sticking the plurality of layers, and sticking the next layer until the surface of the carbon fiber cloth is dry by finger touch; the lapping length of the carbon fiber cloth along the fiber direction is not less than 100mm, and the end part of the carbon fiber cloth is fixed by transverse carbon fibers or bonded steel; 6. protection and decoration; the surface of the reinforced fiber should be protected by plastering or spraying fireproof paint, and can be properly decorated.

Variations and modifications to the above-described embodiments may occur to those skilled in the art, in light of the above teachings and teachings. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should fall within the protection scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims (5)

1. The utility model provides a reinforced structure of foot bridge which characterized in that: the bridge comprises a bridge body, bridge piers are arranged at the bottom of the bridge body, bridge plates are arranged on the bridge piers, limiting parts are arranged on the side surfaces of the bridge plates in an upward protruding mode, the bridge also comprises a bridge deck, the bridge deck is a rectangular concrete layer and is arranged on the bridge plates, the side surfaces of the bridge deck abut against the limiting parts, and the thickness of the bridge deck is smaller than the height of the limiting parts;

the pier is arranged along the cross-sectional direction of bridge body, and the pier is equipped with 2 at least, at the mutual symmetry in bridge body bottom both sides, be equipped with the reinforcing bar in the pier, the skin is concrete layer, reinforcing bar in the pier and the steel bar connection on the bridge plate multilayer carbon cloth layer is pasted to the pier bottom surface, carbon cloth layer anchors carbon cloth through the U-shaped hoop.

2. The reinforcing structure of a footbridge, as recited in claim 1, wherein: and a structural reinforcing mesh is arranged in the bridge floor.

3. The reinforcing structure of a footbridge, as recited in claim 1, wherein: the number of the piers is 4, and the piers are arranged at equal intervals.

4. The reinforcing structure of a footbridge, as recited in claim 1, wherein: five layers of carbon fiber cloth layers with primary strength are adhered to the bottom surface of the pier.

5. The reinforcing structure of a footbridge, as recited in claim 1, wherein: and five circles of U-shaped hoops are adhered outside the carbon fiber cloth layer on the bottom surface of each pier.

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