Old bridge reinforcing device with monitoring function

Abstract

The utility model relates to the technical field of old bridge reinforcement, and discloses an old bridge reinforcement device with a monitoring function, which comprises an old bridge main body, a crack, a carbon fiber plate, a steel wire bundle, a zinc coating, a sensing groove, a strain sensor, a stainless steel pipe, a pressure steel plate, a bolt, a sensing element lead and an epoxy adhesive, the strain sensor is used for monitoring the stress and deformation of the structure in real time, the bolt is used for mechanically fixing the pressure steel plate and the sensor to guarantee stable installation, and the epoxy adhesive is used for bonding the sensor and other assemblies to guarantee long-term fixity and waterproofness. According to the old bridge reinforcing device with the monitoring function, the double advantages of structure enhancement and real-time state monitoring are provided, the bearing capacity of a bridge is remarkably improved through combination of the carbon fiber plates and the steel wire bundles, the service life of the bridge is greatly prolonged due to high strength and good corrosion resistance of the carbon fiber plates and the steel wire bundles, and the service life of the bridge is prolonged. And the whole reinforcing process is more efficient and economical due to the light characteristic of the carbon fibers.

Description

Technical Field

[0001] The utility model relates to the technical field of old bridge reinforcement, in particular to an old bridge reinforcement device with a monitoring function. Background Art

[0002] In recent years, the reinforcement of old bridges in my country has gradually received attention because it is related to traffic safety and the sustainable development of infrastructure. The reinforcement of old bridges is aimed at various diseases that appear in bridges after long-term use, and technical measures are taken to improve and restore the bearing capacity and performance of bridges. First of all, there are many old bridges in my country, which have been in service for a long time and are in urgent need of reinforcement. According to statistics, about one-third of the existing bridges in my country have been in service for more than 30 years. With the increase in traffic flow and load, the structural performance and durability of these bridges have been affected to varying degrees, especially in economically developed areas. The traffic load of old bridges is large and the disease problem is more prominent. Secondly, the diversification of reinforcement technology has improved the effectiveness of old bridge reinforcement. At present, my country has a lot of old bridges in the old A relatively complete technical system has been formed in bridge reinforcement, including steel strand reinforcement, carbon fiber reinforcement, and outsourced steel reinforcement. These technologies have not only improved the bearing capacity of bridges in practical applications, but also extended the service life of bridges. In addition, with the development of the Internet and big data technology, bridge structure health monitoring systems have also been widely used, providing a more scientific decision-making basis for the reinforcement of old bridges. Thirdly, the investment of government and social capital has increased significantly, and the government's financial support for the reinforcement of old bridges has increased year by year. At the same time, it also encourages social capital to participate in the investment and operation of bridge reinforcement. In recent years, many provinces and cities have introduced corresponding policies and regulations to provide a good policy environment for the reinforcement and renovation of old bridges.

[0003] However, the reinforcement of old bridges still faces certain challenges. First, the project of reinforcing old bridges is complex and technically demanding, requiring highly qualified engineering and technical personnel and advanced equipment. Second, some remote and economically underdeveloped areas are short of funds for the reinforcement of old bridges and have weak technical capabilities, and they urgently need more support and assistance at the national level. Finally, current technologies for reinforcing old bridges rarely combine reinforcement with health monitoring, and it is difficult to evaluate the reinforcement effect and subsequent safety of old bridges after reinforcement. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] The purpose of the utility model is to provide an old bridge reinforcement device with a monitoring function to solve the problem that the traditional old bridge reinforcement scheme proposed in the above background technology is complex and has high technical requirements.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an old bridge reinforcement device with monitoring function, the old bridge reinforcement device with monitoring function comprises an old bridge body, a crack, a carbon fiber plate, a steel wire bundle, a galvanized layer, a sensing slot, an elastic rubber pad, a strain sensor, a stainless steel pipe, a pressure steel plate, bolts, a sensor element lead and an epoxy adhesive, a crack exists at the lower end of the old bridge body, a carbon fiber plate is fixedly connected to the lower end of the crack, a plurality of steel wire bundles are coupled inside the carbon fiber plate, and the strain sensor is connected to the pressure steel plate through epoxy adhesive. The adhesive is adhered to the elastic pad, and the pressure steel plate is screwed to 1 / 2 of the elastic pad with bolts to complete the fixation. The old bridge body provides a basic platform for the installation of the reinforcement device, and the cracks are the target area for reinforcement. The carbon fiber plate is used to strengthen the structure and increase the bending strength. The elastic pad is located at both ends of the sensor slot to relieve the stress caused by thermal expansion or contraction. The strain sensor is used to monitor the stress and deformation of the structure in real time. Bolts are used to mechanically fix the pressure steel plate and sensor to ensure stable installation. Epoxy adhesive is used to bond sensors and other components to ensure long-term fixation and waterproofness.

[0008] Preferably, the outer layer of the carbon fiber plate is provided with a galvanized layer, and a sensing groove is provided at the center of the carbon fiber plate along the arrangement direction of the steel wire bundle, and the sensing groove is designed to install and protect the strain sensor to maintain its position and accuracy.

[0009] Preferably, elastic rubber pads are provided at both ends of the sensing slot, and a stainless steel pipe is provided inside the sensing slot.

[0010] Preferably, sensing element leads are provided at both ends of the strain sensor, and the sensing element leads are responsible for transmitting data collected from the strain sensor.

[0011] Preferably, the carbon fiber plate has a thickness of 2-5 cm, and the carbon fiber plate is used to strengthen the structure and increase the bending strength.

[0012] Preferably, the steel wire bundle is twisted from more than 6 steel wires, and has a diameter of less than 1 cm, and provides additional tensile and shear strength.

[0013] Preferably, the galvanized layer has a thickness of 0.1 cm-0.2 cm, and the galvanized layer is used to protect the carbon fiber plate and the steel wire bundle from environmental corrosion.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The old bridge reinforcement device with monitoring function provides the dual advantages of structural reinforcement and real-time status monitoring. The combination of carbon fiber plates and steel wire bundles not only significantly improves the bearing capacity of the bridge, but also greatly extends the service life of the bridge due to its high strength and good corrosion resistance. The lightweight characteristics of carbon fiber also make the entire reinforcement process more efficient and economical;

[0016] 2. The old bridge reinforcement device with monitoring function can monitor the stress and deformation of the bridge in real time by embedding strain sensors in the carbon fiber plates. The precise data from the sensors helps the maintenance team to understand the health of the bridge in a timely manner and detect potential structural problems early, so as to take appropriate maintenance measures to ensure traffic safety.

[0017] 3. The old bridge reinforcement device with monitoring function uses epoxy adhesives and bolts to ensure the firm installation of carbon fiber plates and sensors. This fixing method provides extremely high mechanical stability and long-term reliability. The setting of elastic rubber pads also effectively alleviates the structural stress that may be caused by temperature changes, ensuring the accuracy of the sensors and the durability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of the reinforcement device of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the strain sensor of the utility model;

[0020] Figure 3 This is a schematic diagram of the cross-sectional structure of the reinforcement device of the utility model;

[0021] Figure 4 This is a schematic diagram of the application scenario structure of the reinforcement device of the utility model;

[0022] Figure 5 This is a schematic diagram of the steel wire bundle structure of the utility model.

[0023] In the figure: 1. The main body of the old bridge; 2. The crack; 3. The carbon fiber plate; 4. The steel wire bundle; 5. The galvanized layer; 6. The sensor slot; 7. The elastic rubber pad; 8. The strain sensor; 9. The stainless steel pipe; 10. The pressure steel plate; 11. The bolt; 12. The sensor element lead; 13. The epoxy adhesive. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-Figure 5The utility model provides a technical solution: an old bridge reinforcement device with a monitoring function, the old bridge reinforcement device with a monitoring function comprises an old bridge body 1, a crack 2, a carbon fiber plate 3, a steel wire bundle 4, a galvanized layer 5, a sensing groove 6, an elastic rubber pad 7, a strain sensor 8, a stainless steel pipe 9, a pressure steel plate 10, a bolt 11, a sensor element lead 12 and an epoxy adhesive 13. There is a crack 2 at the lower end of the old bridge body 1, and a carbon fiber plate 3 is fixedly connected to the lower end of the crack 2. The carbon fiber plate 3 is internally coupled with multiple steel wire bundles 4. The old bridge body 1 provides a basic platform for the entire reinforcement project and is the main object of construction. The crack 2 marks the area that needs special reinforcement. The carbon fiber plate 3 enhances the overall stability of the bridge by improving the tensile strength and bending resistance of the structure. The steel wire bundle 4 is used in combination with the carbon fiber plate to provide additional strength and flexibility to cope with various stresses.

[0026] The strain sensor 8 is made of a pressure steel plate 10 adhered to the elastic rubber pad 7 by an epoxy adhesive 13, and the pressure steel plate 10 is screwed to 1 / 2 of the elastic rubber pad 7 with a bolt 11 to complete the fixation. The outer layer of the carbon fiber plate 3 is provided with a galvanized layer 5, and a sensing groove 6 is provided at the center of the carbon fiber plate 3 along the arrangement direction of the steel wire bundle 4. The galvanized layer 5 covers the carbon fiber plate and the steel wire bundle to prevent environmental factors such as humidity and corrosion from damaging the material. The sensing groove 6 is specially designed for placing strain sensors to ensure that the sensor is accurately installed and protect the sensor from direct external impact. The elastic rubber pad 7 is installed at both ends of the sensing groove to alleviate the influence of expansion or contraction caused by temperature on the sensor and maintain the measurement accuracy of the sensor. The strain sensor 8 is responsible for real-time monitoring of the stress and deformation of the reinforced area to provide data support for bridge health monitoring.

[0027] Elastic rubber pads 7 are provided at both ends of the sensing groove 6, a stainless steel pipe 9 is provided inside the sensing groove 6, sensing element leads 12 are provided at both ends of the strain sensor 8, the carbon fiber plate 3 has a thickness of 2-5 cm, the steel wire bundle 4 is twisted by more than 6 steel wires, and its diameter is less than 1 cm, the galvanized layer 5 has a thickness of 0.1 cm-0.2 cm, the stainless steel pipe 9 serves as a protective shell of the strain sensor to prevent mechanical damage and environmental factors from invading the sensor, the pressure steel plate 10 is used to fix the strain sensor in a predetermined position, and is firmly fixed by bolts 11 to ensure that the sensor can work stably in an appropriate position, the sensing element lead 12 connects the strain sensor and the data monitoring system to realize real-time data transmission, and the epoxy adhesive 13 is used to fix the sensor and other key components to ensure that all components can work stably even in harsh environments and provide long-term reliability and waterproofness.

[0028] Working principle: There are cracks 2 at the lower end of the old bridge body 1. In order to reinforce and repair these cracks, carbon fiber plates 3 are used to cover and fix them. The interior of the carbon fiber plate 3 is coupled with multiple steel wire bundles 4 to enhance its structural strength and flexibility. The outer layer of the carbon fiber plate 3 is also coated with a galvanized layer 5 to prevent corrosion and improve its durability. A sensing groove 6 is provided in the center of the carbon fiber plate 3 along the arrangement direction of the steel wire bundles 4. A strain sensor 8 made of a stainless steel pipe 9 is installed in the sensing groove 6 to monitor the real-time stress and deformation of the bridge. Elastic rubber pads 7 are installed at both ends of the sensing groove 6 to relieve the expansion pressure caused by temperature changes. The thickness of the plate 3 is 2-5cm, the steel wire bundle 4 is twisted by more than 6 steel wires and has a diameter of less than 1cm. The thickness of the galvanized layer 5 is 0.1cm-0.2cm. The strain sensor 8 is fixed on the sensing groove 6 through the pressure steel plate 10. The pressure steel plate 10 is adhered to the elastic rubber pad 7 with epoxy adhesive 13 and tightened with bolts 11 to ensure stable fixation. Both ends of the strain sensor 8 are connected to sensor element leads 12 so that data can be transmitted to the monitoring system for analysis. In this way, the old bridge is effectively reinforced, and its structural health status is monitored in real time through the strain sensor 8 to ensure the safety and stability of the bridge.

[0029] Finally, it should be noted that the above content is only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model. Simple modifications or equivalent substitutions of the technical solution of the utility model by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the utility model.

Claims

1. An old bridge reinforcement device with monitoring function, comprising an old bridge body (1), a crack (2) and a carbon fiber plate (3), characterized in that: There is a crack (2) at the lower end of the old bridge body (1), and a carbon fiber plate (3) is fixedly connected to the lower end of the crack (2). A plurality of steel wire bundles (4) are coupled inside the carbon fiber plate (3). The strain sensor (8) is adhered to the elastic rubber pad (7) by a pressure steel plate (10) through an epoxy adhesive (13), and the pressure steel plate (10) is screwed to 1 / 2 of the elastic rubber pad (7) with a bolt (11) to complete the fixation.

2. The old bridge reinforcement device with monitoring function according to claim 1 is characterized in that: The outer layer of the carbon fiber plate (3) is provided with a galvanized layer (5), and a sensing groove (6) is provided at the center of the carbon fiber plate (3) along the arrangement direction of the steel wire bundle (4).

3. The old bridge reinforcement device with monitoring function according to claim 2 is characterized in that: Elastic rubber pads (7) are provided at both ends of the sensing groove (6), and a stainless steel pipe (9) is provided inside the sensing groove (6).

4. The old bridge reinforcement device with monitoring function according to claim 1 is characterized in that: Sensing element leads (12) are provided at both ends of the strain sensor (8).

5. The old bridge reinforcement device with monitoring function according to claim 1 is characterized in that: The carbon fiber plate (3) has a thickness of 2-5 cm.

6. The old bridge reinforcement device with monitoring function according to claim 1 is characterized in that: The steel wire bundle (4) is twisted together from more than 6 steel wires, and has a diameter of less than 1 cm.

7. The old bridge reinforcement device with monitoring function according to claim 2 is characterized by: The thickness of the zinc coating (5) is 0.1 cm-0.2 cm.

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