Bridge reinforcing device without interrupting traffic

Abstract

The utility model relates to the technical field of bridge reinforcing, and particularly discloses a bridge reinforcing device without interrupting traffic. The device comprises a hinge joint glue injection system, an anchor rod reinforcing system and a temporary supporting system, the hinge joint glue injection system comprises multiple groups of glue injection pipes, multiple groups of measuring pipes, multiple groups of first glue injection layers and multiple groups of second glue injection layers, the anchor rod reinforcing system comprises self-locking anchor rods, locking nuts and a steel plate. The multiple self-locking anchor rods are evenly arranged in the length direction of the hinge joint. The two temporary supporting systems are located at the two ends of the hinge joint correspondingly, and each temporary supporting system comprises a batten and a polystyrene foam layer. And through the design of'hinge joint glue injection and self-locking anchor rod reinforcement ', the bridge is reinforced without interrupting traffic. The bridge can be efficiently reinforced under the condition that traffic is not interrupted, the defects of a traditional reinforcing mode are effectively overcome, and the structural stability and safety of the bridge are remarkably improved.

Description

Technical Field

[0001] This application relates to the field of bridge reinforcement technology, and in particular to a bridge reinforcement device that does not interrupt traffic. Background Technology

[0002] In the field of bridge construction and maintenance, prefabricated hollow slab bridges are widely used, but "single-slab stress" defects occur frequently, seriously threatening bridge safety. Traditional reinforcement methods, such as chiseling out and rebuilding the asphalt and concrete pavement of the bridge deck and reinforcing it with tie rods at the hinge joints, have some effect, but have many drawbacks. First, construction requires closing the roadway, which not only leads to traffic congestion and increases traffic maintenance costs, but may also cause traffic accidents, causing great inconvenience to the social economy and public travel. Second, the construction period is long, occupying traffic resources for a long time and affecting the smooth flow of traffic in the area. Third, for the later stages of hinge joint defects, traditional methods are difficult to effectively deal with complex problems such as uneven hinge joint width and the lack of grouting conditions in some areas.

[0003] Currently, although some bridge reinforcement attempts have been made that do not interrupt traffic, such as simple hinge joint injection technology, these are only suitable for the early or middle stages of damage. When faced with the complex situation in the later stages of damage, the reinforcement effect is not good and cannot meet the requirements for long-term bridge stability. Utility Model Content

[0004] This utility model addresses the aforementioned problems in existing technologies by providing a bridge reinforcement device that does not disrupt traffic. It overcomes the shortcomings of traditional reinforcement methods, efficiently and reliably repairs bridge hinge joint defects without affecting normal traffic flow on the bridge, enhances the overall integrity and stability of the bridge structure, extends the service life of the bridge, and reduces traffic impact and construction costs.

[0005] The objective of this utility model is mainly achieved through the following solution:

[0006] A bridge reinforcement device that does not disrupt traffic, comprising:

[0007] The joint injection system includes an injection tube, a measuring tube, a first injection layer, and a second injection layer. Multiple sets of the injection tube and the measuring tube are evenly arranged along the length of the joint. The top of the injection tube is lower than the bottom of the original joint filler, the top of the measuring tube is lower than the top of the injection tube, the upper surface of the first injection layer is flush with the top of the measuring tube, and the upper surface of the second injection layer is flush with the top of the bridge deck.

[0008] An anchor reinforcement system includes self-locking anchors, locking nuts, and steel plates. Multiple self-locking anchors are evenly arranged along the length of the hinge joint, and the anchor head of the self-locking anchor is located within the second adhesive layer. The end of the self-locking anchor passes through the bottom of the hinge joint and is threadedly connected to a locking nut. The steel plate is sleeved on the end of the self-locking anchor and is fixed between the bottom of the hinge joint and the locking nut by tightening the locking nut.

[0009] The temporary support system consists of two sets, located at both ends of the hinge, each including wooden strips and a foam layer. The wooden strips are vertically inserted into the hinge, and there are at least two wooden strips. A foam layer is filled between two adjacent wooden strips.

[0010] The bottom of the hinge is also filled with a sealing layer.

[0011] Preferably, both the injection tube and the measuring tube are made of PVC conduit, and the distance between the top of the injection tube and the bottom of the original hinge filler is 0.8-1.2cm, the distance between the top of the measuring tube and the bottom of the original hinge filler is 3-15cm, and the distance between the injection tube and the measuring tube in the same group is 4-6cm.

[0012] Preferably, both the first and second injection layers are made of A and B modified epoxy resin structural adhesives.

[0013] Preferably, the foam layer is made of polyurethane foam.

[0014] Preferably, the sealing layer includes mortar and sealing tape, wherein the mortar is filled at the joint and the sealing tape is adhered to the surface of the mortar.

[0015] In summary, compared with the prior art, the present invention has the following beneficial technical effects:

[0016] (1) This utility model has little impact on traffic. The entire process is carried out from the bottom of the beam. The entire reinforcement process does not require closing the bridge surface to traffic, which greatly reduces the interference with traffic, reduces the cost of maintaining traffic flow, avoids economic losses and traffic accident risks caused by traffic congestion, and improves social and economic benefits.

[0017] (2) The present invention has a good reinforcement effect. The joint injection system and the anchor reinforcement system work together to restore the bonding force between the beam and the plate through injection and to provide reliable mechanical anchoring by using self-locking anchors. This effectively solves the complex problems in the later stage of joint defects, significantly enhances the integrity and stability of the bridge structure, improves the bridge's load-bearing capacity, and extends the bridge's service life.

[0018] (3) This utility model is highly adaptable. The temporary support system can be adapted to bridges with different degrees of damage, effectively limiting beam vibration. The flexible arrangement of the injection tube, measuring tube and self-locking anchor can be flexibly adjusted according to the actual situation of the hinge joint. It is applicable to various hinge joint widths and damage conditions, improving the versatility and adaptability of the reinforcement device and reinforcement method. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the installation of the self-locking anchor rod in this utility model;

[0021] Figure 3 This is a schematic diagram of the installation of the glue injection tube and the measuring tube in this utility model;

[0022] Figure 4 This is a diagram showing the arrangement of the glue injection tube in this utility model;

[0023] Figure 5 yes Figure 4 Enlarged view of point A in the middle;

[0024] Figure 6 This is a schematic diagram of the top installation of the glue injection tube and the measuring tube in this utility model;

[0025] Figure 7 This is a schematic diagram of the temporary support system of this utility model;

[0026] Figure 8 This is a schematic diagram of the sealing layer in this utility model.

[0027] Figure reference numerals: 1: Injection tube; 2: Measuring tube; 3: First injection layer; 4: Second injection layer; 5: Bottom of original hinge joint filler; 6: Bridge deck; 7: Self-locking anchor; 8: Locking nut; 9: Steel plate; 10: Wooden strip; 11: Foaming layer; 12: Sealing layer. Detailed Implementation

[0028] The technical solution of this utility model will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings. It should be understood that the implementation of this utility model is not limited to the following embodiments, and any modifications and / or alterations made to this utility model will fall within the protection scope of this utility model.

[0029] like Figure 1-8 As shown, this utility model discloses a technical solution, a bridge reinforcement device that does not interrupt traffic, including: a hinge joint injection system, an anchor reinforcement system, a temporary support system, and a sealing layer 12.

[0030] The joint injection system includes an injection tube 1, a measuring tube 2, a first injection layer 3, and a second injection layer 4. Multiple sets of injection tubes 1 and measuring tubes 2 are evenly arranged along the length of the joint to ensure uniform injection and effective monitoring of the injection process. The top of the injection tube 1 is lower than the bottom 5 of the original joint filler, generally 0.8-1.2 cm, preferably 1 cm, to facilitate smooth injection of the adhesive into the critical bonding area at the bottom of the joint. The top of the measuring tube 2 is lower than the top of the injection tube 1, generally 3-15 cm from the bottom 5 of the original joint filler. (The last sentence appears to be incomplete and possibly refers to a different system.) The distance between the injection tube 1 and the measuring tube 2 is 4-6cm, preferably 5cm. This reasonable spacing design ensures that the measuring tube accurately measures the rise of the adhesive without affecting the injection effect. The upper surface of the first injection layer 3 is flush with the top of the measuring tube 2, and the upper surface of the second injection layer 4 is flush with the top of the bridge deck 6. The two injection structures work together to gradually fill the joint from bottom to top, enhancing the bonding effect. Both the injection tube 1 and the measuring tube 2 are made of PVC conduit, preferably 16mm PVC conduit, which has strong chemical corrosion resistance and can adapt to the adhesive environment, ensuring the stability and reliability of the injection and measurement process.

[0031] The anchor reinforcement system includes self-locking anchors 7, locking nuts 8, and steel plates 9. Multiple self-locking anchors 7 are evenly arranged along the length of the hinge joint, with a distance of 40-60cm between adjacent self-locking anchors 7, preferably 50cm, to ensure stable mechanical anchoring force at different positions of the hinge joint. The anchor head of the self-locking anchor 7 is located within the second adhesive layer 4, and enhances the anchoring effect through synergy with the adhesive. The end passes through the bottom of the hinge joint and is threadedly connected to the locking nut 8. The steel plate 9 is fitted onto the end of the self-locking anchor 7. Tightening the locking nut 8 fixes the steel plate 9 between the bottom of the hinge joint and the locking nut 8, thereby effectively reinforcing the hinge joint and preventing misalignment between beams and slabs.

[0032] The temporary support system has one set at each end of the hinge joint. Each set includes a wooden strip 10 inserted vertically into the hinge joint and a foam layer 11 filled between adjacent wooden strips 10. The wooden strips 10 provide a certain rigid support. The foam layer 11 is made of polyurethane foam, which has good filling and cushioning properties. During construction, especially during the injection and anchoring process, it can effectively limit the vibration amplitude of the beam and prevent brittle failure, thus ensuring construction safety and quality. Preferably, each end has three layers of wooden strips 10.

[0033] Sealing layer 12: Located at the bottom of the hinge joint, it consists of mortar and sealing tape. The mortar fills the gap of the hinge joint, and the sealing tape is pasted on the surface of the mortar to prevent the glue from leaking during the injection of glue, ensuring that the glue is effectively filled in the hinge joint and improving the reinforcement effect. The mortar can be anti-sagging polymer mortar or epoxy mortar, and the sealing tape can be fiber reinforced rubber tape.

[0034] Specifically, both the first adhesive layer 3 and the second adhesive layer 4 use A and B modified epoxy resin structural adhesives.

[0035] This application also provides a bridge reinforcement method using the aforementioned non-disruptive traffic reinforcement device, comprising the following steps:

[0036] S1. Install a temporary support system: Install a temporary support system at both ends of the hinge joint at the bottom of the bridge beam to be reinforced. Gradually fill the hinge joint with wooden strips 10 and fill the space between adjacent wooden strips 10 with expanding foam. The combination of wooden strips 10 and expanding foam layer 11 can quickly provide support to the beam, limit the vibration amplitude of the beam, prevent brittle failure, and avoid the aggravation of the disease or the impact on the construction quality due to vibration during subsequent construction. Generally, when the misalignment between the bridge decks of the diseased bridge is greater than 5mm, a temporary support system is installed.

[0037] S2. Cleaning damaged hinge joints: Use an electric wire brush to initially clean the debris inside the hinge joint, remove loose particles and oil stains, and then rinse with high-pressure water to thoroughly remove mud, sand, debris and other debris from the hinge joint, creating good bonding conditions for subsequent glue injection and self-locking anchor bolt 7 implantation.

[0038] S3. Insert self-locking anchor rod 7: Vertically insert self-locking anchor rod 7 at the hinge joint position at the bottom of the beam, ensuring that the anchor head is inserted into the original hinge joint filler, and evenly arranged at a spacing of 40-60cm to provide mechanical anchoring force for the hinge joint and enhance the connection strength between the beam and the plate.

[0039] S4. Install injection tube 1 and measuring tube 2: Vertically insert injection tube 1 and measuring tube 2 at the hinge joint position at the bottom of the beam. Multiple sets of injection tube 1 and measuring tube 2 are evenly arranged along the length of the hinge joint, and ensure that the top of injection tube 1 is 1cm below the bottom 5 of the original hinge joint filler, so as to facilitate the smooth injection of adhesive into the hinge joint. The top of measuring tube 2 is lower than the top of injection tube 1, so as to achieve accurate measurement of the injection process.

[0040] S5. Sealing the bottom of the hinge joint: Use sealing layer 12 to seal the bottom of the hinge joint. Use a trowel to evenly apply the anti-sagging polymer mortar to the bottom of the hinge joint. The thickness of the mortar should be controlled at 5-10mm. During the application process, ensure that the mortar is applied evenly and smoothly to avoid voids or uneven thickness. Ensure that it can effectively prevent the adhesive from flowing down. After the anti-sagging polymer mortar is applied, immediately stick the sealing tape to the mortar surface. When sticking, start from one end and slowly stick to the other end. At the same time, press the sealing tape with your hand or a tool to make it fully adhere to the mortar and expel the air between the sealing tape and the mortar. Ensure that the adhesion is firm and tight and prevent air bubbles or hollows. Pay special attention to the contact surface between the glue injection tube 1 and the measuring tube 2. It must be sealed to prevent grout leakage. After the construction is completed, let it stand for at least 48 hours and observe the sealing effect of the hinge joint. Only if there are no abnormalities can the next step of construction be carried out.

[0041] S6. One-time injection: Use a pressure injector to inject A and B modified epoxy resin structural adhesive into the hinge joint through injection tube 1. The ratio of A and B components is 2:1. The amount of adhesive prepared at one time shall not exceed 3kg, and the injection time shall not exceed 30min. Inject adhesive without pressure until the adhesive comes out of the measuring tube 2 in the same group. After emptying injection tube 1, wait for the adhesive to cure (about 2 hours at 25℃). If the ambient temperature is lower than 15℃, the curing time shall be extended appropriately to allow the adhesive to initially fill the bottom of the hinge joint and restore some of the bonding strength. The prepared adhesive must be injected immediately. If the prepared adhesive is left for more than 30min, the adhesive should be prepared again.

[0042] S7. Secondary injection: Seal the measuring tube 2, and inject the same adhesive again through the injection tube 1 using a pressure injector. Control the pressure to 0.5MPa to ensure good flowability and penetration of the adhesive, so that it can fill the crack. Continue to inject adhesive until adhesive comes out of the bridge deck 6 or leaks at the beam end, or inject and maintain a pressure of 0.5MPa for 15 minutes to ensure that the hinge joint is completely filled and further enhance the bonding effect.

[0043] S8. Install steel plate 9: After the adhesive has cured, anchor steel plate 9 at the end of self-locking anchor rod 7 by locking nut 8, so as to effectively transfer the anchoring force of self-locking anchor rod 7 to hinge joint structure and enhance the overall reinforcement effect.

[0044] S9. Remove the temporary support system: At least 48 hours after construction is completed, remove the temporary support system to restore the bridge to its normal stress state, while ensuring the reinforcement effect is stable and reliable.

[0045] Specifically, in steps S6 and S7, the glue injection sequence is from one end of the bottom hinge joint of the beam to the other end. The injection can be stopped when glue flows out of the measuring tube 2, and then the injection can be moved to the next glue injection tube 1 to continue.

[0046] The following details the specific implementation of this application:

[0047] 1. Project Overview: A prefabricated hollow slab bridge on a city expressway has developed "single-slab stress" defects. There are obvious longitudinal joints at the hinge joints. When heavy vehicles pass, the beams and slabs shift significantly. After inspection, the defects are found to be quite serious. Some hinge joints have uneven widths, requiring reinforcement treatment that does not interrupt traffic.

[0048] 2. Construction process:

[0049] Install a temporary support system: Insert wooden strips 10 vertically at both ends of the bottom hinge joint of the beam according to the design requirements, and fill the space between adjacent wooden strips 10 with polyurethane foam to form a foam layer 11, which quickly provides stable support to the beam and limits the vibration of the beam.

[0050] Cleaning damaged hinge joints: Use an electric wire brush to thoroughly clean the inside of the hinge joints, removing loose materials and oil stains from the surface; then use a high-pressure water gun to rinse and thoroughly remove mud, sand, debris, etc. from the hinge joints to ensure that the hinge joints are clean;

[0051] Insert self-locking anchor 7: According to the design spacing of 50cm, drill vertical holes at the bottom hinge joint of the beam and insert self-locking anchor 7, ensuring that the anchor head is accurately inserted into the original hinge joint filler. After completion, check the verticality and anchoring depth of the anchor.

[0052] Install injection tube 1 and measuring tube 2: Vertically insert injection tube 1 and measuring tube 2 at the hinge joint position at the bottom of the beam. Control the distance between the top of injection tube 1 and the bottom 5 of the original hinge joint filler to be 1cm, and the distance between the top of measuring tube 2 and the bottom 5 of the original hinge joint filler to be 12cm. The distance between injection tube 1 and measuring tube 2 in the same group is 5cm to ensure the accuracy of injection and measurement.

[0053] To seal the bottom of the hinge joint: First, fill the bottom of the hinge joint with mortar, then stick the sealing tape on the mortar surface to form a sealing layer 12. After the construction is completed, let it stand for 48 hours. During this period, check the sealing layer regularly for cracks or peeling.

[0054] One-time injection: Prepare modified epoxy resin structural adhesives of components A and B in a 2:1 ratio. Prepare 2kg of adhesive at a time. Use a pressure injector for pressureless injection. Inject adhesive from one end of the bottom hinge joint of the beam to the other end. When adhesive comes out of measuring tube 2 in the same group, stop the injection, empty the injection tube 1, and wait for the adhesive to cure for 2 hours at an ambient temperature of 25℃.

[0055] Secondary injection: Seal the measuring tube 2, prepare the same adhesive again, and inject the adhesive using a pressure injector at a pressure of 0.5MPa. During the injection process, closely observe the bridge surface 6. The injection should continue until adhesive seeps out of the bridge surface 6. For hinge joints on the bridge surface 6 without cracks, the injection should continue until adhesive leaks out at the beam end or until the injection reaches and maintains a pressure of 0.5MPa for 15 minutes.

[0056] Install steel plate 9: After the adhesive has completely cured, put steel plate 9 on the end of self-locking anchor 7, and fix steel plate 9 firmly to the bottom of hinge by tightening locking nut 8 to complete the installation of anchor reinforcement system;

[0057] Remove the temporary support system: 48 hours after construction is completed, remove the temporary support system at both ends of the hinge joint, namely the wooden strip 10 and the foam layer 11.

[0058] 3. Effect Detection: After the reinforcement was completed, static load test and dynamic load test were carried out on the bridge. The test results showed that the overall stiffness of the bridge was significantly improved, the misalignment between the beams and slabs was effectively suppressed, the bond strength at the hinge joints met the design requirements, the load-bearing capacity of the bridge was significantly enhanced, and it met the traffic needs of the urban expressway. In the subsequent long-term monitoring, no new defects were found in the bridge, and the reinforcement effect was stable and reliable.

[0059] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A bridge reinforcement device that does not disrupt traffic, characterized in that, include: The joint injection system includes an injection tube (1), a measuring tube (2), a first injection layer (3), and a second injection layer (4). The injection tube (1) and the measuring tube (2) are evenly arranged in multiple sets along the length of the joint. The top of the injection tube (1) is lower than the bottom (5) of the original joint filler, the top of the measuring tube (2) is lower than the top of the injection tube (1), the upper surface of the first injection layer (3) is flush with the top of the measuring tube (2), and the upper surface of the second injection layer (4) is flush with the top of the bridge deck (6). The anchor reinforcement system includes a self-locking anchor (7), a locking nut (8) and a steel plate (9). Multiple self-locking anchors (7) are evenly arranged along the length of the hinge joint, and the anchor head of the self-locking anchor (7) is located in the second adhesive layer (4). The end of the self-locking anchor (7) passes through the bottom of the hinge joint and is threadedly connected to the locking nut (8). The steel plate (9) is sleeved on the end of the self-locking anchor (7), and the steel plate (9) is fixed between the bottom of the hinge joint and the locking nut (8) by tightening the locking nut (8). The temporary support system has two sets, which are located at both ends of the hinge. Each set includes a wooden strip (10) and a foam layer (11). The wooden strip (10) is vertically inserted into the hinge, and there are at least two wooden strips (10). A foam layer (11) is filled between two adjacent wooden strips (10). The bottom of the hinge is also filled with a sealing layer (12).

2. The bridge reinforcement device that does not interrupt traffic according to claim 1, characterized in that: Both the glue injection tube (1) and the measuring tube (2) are made of PVC conduit. The distance between the top of the glue injection tube (1) and the bottom of the original hinge filler (5) is 0.8-1.2cm, and the distance between the top of the measuring tube (2) and the bottom of the original hinge filler (5) is 3-15cm. The distance between the glue injection tube (1) and the measuring tube (2) in the same group is 4-6cm.

3. The bridge reinforcement device that does not interrupt traffic according to claim 1, characterized in that: Both the first injection layer (3) and the second injection layer (4) are made of A and B modified epoxy resin structural adhesives.

4. The bridge reinforcement device that does not interrupt traffic according to claim 1, characterized in that: The foam layer (11) is made of polyurethane foam.

5. A bridge reinforcement device that does not interrupt traffic as described in claim 1, characterized in that: The sealing layer (12) shown includes mortar and sealing tape, wherein the mortar is filled at the joint and the sealing tape is adhered to the surface of the mortar.

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