A method for monitoring and repairing bridge settlement

Abstract

This invention belongs to the field of bridge engineering, specifically a method for monitoring and adjusting bridge settlement. The lower part of the bridge bearing body is a base basin, on which monitoring and height adjustment channels are respectively opened. The upper part of the bearing body can move relative to the lower base basin in the height direction. A data acquisition module located outside the bearing body collects bridge bearing pressure data from monitoring sensors and uploads it to a cloud server. A data monitoring platform is deployed on the cloud server, displaying the bridge bearing pressure data uploaded to the cloud server. This allows for real-time monitoring of the stress on the bridge pier. When the bridge pier shows signs of settlement, a height adjustment medium is injected through the height adjustment channels to raise the upper part of the bearing body, completing the settlement adjustment. This invention not only allows for real-time monitoring and feedback of bridge operation, but also enables stepless height adjustment without supporting the beam or interrupting traffic.

Description

Technical Field

[0001] This invention belongs to the field of bridge engineering, specifically a method for monitoring and repairing bridge settlement. Background Technology

[0002] In recent years, with the continuous improvement of my country's economic level, the country has been investing more and more in transportation construction, resulting in a surge in bridge projects. This is closely related to the current level of socio-economic development. Although the construction industry has developed rapidly in recent years, shortcomings still exist in bridge construction; in particular, uneven bridge settlement is a prominent issue. This not only causes vehicles to bounce during travel but also triggers other traffic problems, seriously affecting traffic safety. Therefore, to effectively improve the situation, appropriate countermeasures must be taken during the design of the roadbed and pavement in the settlement section of bridge construction to improve the quality of roadbed and pavement construction in this section and ensure the quality of bridge construction and its normal operation during use. When bridge pile foundation settlement and construction errors occur, force measurement and early warning systems should be implemented, and bridge height adjustments should be made. Establishing permanent monitoring of bridges is an important aspect of bridge maintenance and management, providing strong evidence for assessing the health status of bridges. Summary of the Invention

[0003] In order to meet the needs of bridge pile foundation settlement monitoring and bridge height adjustment, the purpose of this invention is to provide a bridge settlement monitoring and repair method.

[0004] The objective of this invention is achieved through the following technical solution:

[0005] The bridge bearing of this invention has a base basin at the bottom, on which a monitoring channel and a height adjustment channel are respectively opened. The upper part of the bearing body can move relative to the lower base basin in the height direction. A monitoring medium is injected through the monitoring channel to form an oil film between the base basin and the upper part of the bearing body. One end of the monitoring channel extends below the oil film, and the other end is equipped with a monitoring sensor after the monitoring medium is injected. One end of the height adjustment channel extends between the base basin and the upper part of the bearing body, and is located outside the oil film. The other end of the height adjustment channel is connected to a height adjustment medium source. A data acquisition module located outside the bearing body collects the bridge bearing pressure data from the monitoring sensor and uploads it to a data monitoring platform for display, thereby monitoring the stress on the bridge pier in real time. When the bridge pier settles, the height adjustment medium is injected through the height adjustment channel to adjust the upper part of the bearing body, completing the adjustment after settlement.

[0006] The specific steps are as follows:

[0007] Step 1: During the construction of a new bridge or the renovation of an old bridge, bridge bearings are installed between the beams and the piers. The bridge bearings monitor the stress on the piers in real time through internal monitoring sensors, external data acquisition and transmission modules, and a data monitoring platform. During the installation of the bridge bearings, the stress on the bridge bearings is also monitored in real time.

[0008] Step 2: During normal operation of the bridge, the bridge bearing monitors the stress on the piers in real time through internal monitoring sensors, external data acquisition and transmission modules, and a data monitoring platform. When the force attenuation rate or increase rate is greater than the force value at the beginning of operation, the data monitoring platform of the bridge bearing will display an alarm.

[0009] Step 3: By measuring the elevation of the bridge piers, determine whether the bridge piers at the bridge supports and other bridge piers under the same beam have subsided.

[0010] Step four: If the change in force value is caused by the settlement of the bridge pier, the bridge bearings with decreased force value are raised to the same beam. The force value deviation of multiple bridge bearings is within the set range, and the settlement correction is completed.

[0011] In step one, if the force deviation of multiple bridge bearings under the same beam is within 3%, the requirement is met; otherwise, the height of the bridge bearings is adjusted by filling the height adjustment medium through the height adjustment channel until the force deviation is less than 3%, and the data monitoring platform records the initial force value.

[0012] In step two, when the force value attenuation rate or increase rate exceeds 30% of the force value at the beginning of operation, the data monitoring platform will display an alarm.

[0013] In step four, the force deviation of multiple bridge bearings is within 3%, completing the post-settlement adjustment.

[0014] The adjusting medium is a single-component thermoplastic material or an AB-component polymer prepolymer material.

[0015] The data acquisition and transmission module collects pressure data from the monitoring sensor in the form of electrical signals, obtains the maximum and minimum values ​​collected each day, and uploads the electrical signal data to the data monitoring platform. The data monitoring platform converts the electrical signal data into bridge bearing pressure data through linear proportional relationship calculation and displays it on the data monitoring platform.

[0016] The advantages and positive effects of this invention are as follows:

[0017] This invention can not only monitor and provide real-time feedback on the bridge's operational status, but also achieve stepless height adjustment without lifting the beams or interrupting traffic. Attached Figure Description

[0018] Figure 1 This is a structural cross-sectional view of the bridge support of the present invention;

[0019] Figure 2 This is a schematic diagram illustrating the working principle of the present invention;

[0020] Wherein: 1 is the support body, 2 is the base basin, 3 is the monitoring channel, 4 is the height adjustment channel, and 5 is the oil film. Detailed Implementation

[0021] The invention will now be described in further detail with reference to the accompanying drawings.

[0022] like Figure 1 , Figure 2 As shown, the bridge bearing of the present invention includes a bearing body 1, a data acquisition and transmission module, a cloud server, and a data monitoring platform. The lower part of the bearing body 1 is a base basin 2. The bottom end of the base basin 2 is provided with a monitoring channel 3 and a height adjustment channel 4 that connect to the interior of the base basin 2. In this embodiment, there are multiple monitoring channels 3 and height adjustment channels 4, which are evenly arranged along the circumference and are spaced apart. The number of height adjustment channels 4 depends on the number of times the bridge bearing needs to be adjusted during use. The upper part of the bearing body 1 can move relative to the lower base basin 2 in the height direction. A monitoring medium is injected through the monitoring channel 3 to form an oil film 5 between the base basin 2 and the upper part of the bearing body 1. One end of each monitoring channel 3 extends below the oil film 5, and a monitoring sensor (e.g., a pressure transmitter) is installed at the other end after the monitoring medium is injected. When the bridge pier settles, the oil film 5 transmits pressure to the monitoring sensor through the monitoring channel 3. The monitoring sensor collects pressure data and can monitor the bridge settlement in real time. One end of each height adjustment channel 4 is opened between the base basin 2 and the upper part of the support body 1, and is located outside the oil film 5. The other end of the height adjustment channel 4 is connected to the height adjustment medium source. The monitoring medium in this embodiment is silicone oil.

[0023] The high-polymer medium of this invention is a single-component thermoplastic material or an AB-component polymer prepolymer material. The single-component thermoplastic material, such as low-density polyethylene resin (HP-LDPE) produced by Shanghai Yuanye Biotechnology Co., Ltd., has a density of 0.918 g / cm³, a melting point of 105–115°C, is solid at room temperature, and becomes liquid after heating. The AB-component polymer prepolymer material, such as HC-5261AB produced by Shanghai Hecheng Polymer Technology Co., Ltd., has components A and B as liquids before filling, with a weight ratio of 1:1. The stirring time is not less than 2 minutes (3 minutes in this embodiment), and the mixture is poured into a high-pressure filling device with a filling pressure not less than 45 MPa (50 MPa in this embodiment). After filling, the AB components naturally solidify at room temperature for 0.5 h–24 h (24 h in this embodiment). Regardless of whether the high-polymer medium is single-component or two-component, the hardness IRHD after curing is less than 60, and the compressive strength is greater than 45 MPa. In this embodiment, the height adjustment medium is a polymer prepolymer material of component AB, which has a hardness of 1RHD50 and a compressive strength of 60MPa after curing.

[0024] The data acquisition and transmission module located outside the bearing body 1 collects pressure data from the monitoring sensors in the form of electrical signals. It calculates the maximum and minimum values ​​collected daily and then uploads the data to a cloud server via 4G or WiFi wireless communication. The data monitoring platform, located on the cloud server, converts the electrical signal data into bridge bearing pressure data using linear proportional calculations and displays it on the platform. This allows for real-time monitoring of the pier's stress. When pier subsidence occurs, a heightening medium is injected through the heightening channel to raise the upper part of the bearing body 1, completing the post-settlement adjustment.

[0025] The specific steps for bridge settlement monitoring and repair are as follows:

[0026] Step 1: During the construction or renovation of a bridge, bridge bearings are installed between the beam and the pier. The bridge bearings monitor the stress on the piers in real time through monitoring sensors inside the bearing body 1, data acquisition and transmission modules outside the bearing body 1, and a data monitoring platform. During the installation of the bridge bearings, the stress on the bridge bearings is monitored in real time. When the force value deviation of multiple bridge bearings under the same beam is within 3%, the requirements are met. When the force value exceeds the tolerance, the height of the bridge bearings is adjusted by filling the AB component of the high polymer prepolymer material in the height adjustment channel 4 until the force value deviation is less than 3%. The monitoring system records the initial force value.

[0027] Step 2: During normal operation of the bridge, the bridge bearings monitor the stress on the piers in real time through monitoring sensors inside the bearing body 1, data acquisition and transmission modules outside the bearing body 1, and a data monitoring platform. When the force attenuation rate or increase rate is greater than 30% of the force value at the beginning of operation, the data monitoring platform of the bridge bearings will display an alarm. For example, if the force value at the beginning of operation is D, and the force value later is less than 90%D or greater than 110%D, an alarm will be triggered.

[0028] Step 3: The operation and maintenance personnel arrive at the bridge bearing site to take measurements. They measure the elevation of the piers at the bridge bearings under the same beam and compare it with the design value to determine if there is any subsidence. At the same time, they check the surface of the piers for cracks and damage. If there is subsidence and the surface of the piers is not damaged, it indicates a problem with the foundation settlement.

[0029] Step four: Based on the on-site inspection, if the change in force value is caused by the settlement of the bridge pier, the bridge bearings with decreased force value are raised to the same beam. The force value deviation of multiple bridge bearings is within 3%, thus completing the adjustment after settlement.

Claims

1. A method of bridge settlement monitoring and remediation, the method comprising: The bottom of the support body (1) of the bridge support is a bottom basin (2), monitoring passages (3) and height adjusting passages (4) are respectively arranged on the bottom basin (2), the upper part of the support body (1) can move along the height direction relative to the bottom basin (2), monitoring medium is injected through the monitoring passages (3), an oil film (5) is formed between the bottom basin (2) and the upper part of the support body (1), one end of the monitoring passage (3) is arranged below the oil film (5), and the other end is provided with a monitoring sensor after the monitoring medium is injected, one end of the height adjusting passage (4) is arranged between the bottom basin (2) and the upper part of the support body (1) and is located outside the oil film (5), and the other end of the height adjusting passage (4) is in communication with a height adjusting medium source; the bridge support pressure data of the monitoring sensor is collected by a data acquisition and transmission module outside the support body (1) and is uploaded to a data monitoring platform to be displayed, so that the stress condition of the pier is monitored in real time, when the pier is in the sinking condition, the height adjusting medium is injected through the height adjusting passage, the upper part of the support body (1) is adjusted in height, and the adjustment after the settlement is completed. The data acquisition and transmission module collects the pressure data of the monitoring sensor in the form of an electric signal, obtains the maximum value and the minimum value collected in each day, and uploads the electric signal data to the data monitoring platform; the data monitoring platform converts the electric signal data into the bridge support pressure data through linear proportional relationship operation and displays the data on the data monitoring platform. The specific steps are as follows: step one, during the construction of a new bridge or the reconstruction of an old bridge, a bridge support is arranged between the beam body and the pier, the stress condition of the pier is monitored in real time by the internal monitoring sensor, the external data acquisition and transmission module and the data monitoring platform, and the stress condition of the bridge support is monitored in real time during the installation of the bridge support; Step two, during the normal operation of the bridge, the stress condition of the pier is monitored in real time by the internal monitoring sensor, the external data acquisition and transmission module and the data monitoring platform of the bridge support, and the data monitoring platform of the bridge support is alarm displayed when the force value attenuation rate or the increase rate is greater than the initial force value; Step three, whether the pier under the bridge support and other piers under the same beam are in the sinking condition is determined by measuring the elevation of the pier; Step four, if the change of the force value is caused by the sinking of the pier, the height of the force value attenuation bridge support is adjusted, the height is adjusted to the same beam, the force value deviation of the multiple bridge supports is within the set range, and the adjustment after the settlement is completed.

2. The method of claim 1, wherein: In step one, when the force value deviation of the multiple bridge supports under the same beam is within 3%, the requirement is met; otherwise, the height of the bridge support is adjusted by filling the height adjusting medium through the height adjusting passage (4), the force value deviation is adjusted to be less than 3%, and the initial force value is recorded by the data monitoring platform.

3. The method of claim 1, wherein: In step two, when the force value attenuation rate or the increase rate is greater than 30% of the initial force value, the data monitoring platform is alarm displayed.

4. The method of claim 1, wherein: In step four, the force value deviation of the multiple bridge supports is within 3%, and the adjustment after the settlement is completed.

5. The method of claim 1, wherein: The height adjustment medium is a single-component thermoplastic material or an AB-component polymeric prepolymer material.

Images