Bridge concrete pouring temperature monitoring method

Abstract

The invention provides a bridge concrete pouring temperature monitoring method, which comprises the following steps of: in the concrete pouring construction process of a bridge, fixing an inhaul cable in a cable guide pipe, and arranging a temperature detection assembly at a position corresponding to the lower part of each cable guide pipe on the bridge; a coordinate system is established in the axial direction of the bridge with the starting point of one end of the bridge as the origin of coordinates, and after coordinate values of the temperature sensors are obtained according to the coordinate system, the coordinate average value corresponding to each temperature detection assembly is calculated according to the coordinate values; temperature values measured by the temperature sensors are obtained, and a temperature average value corresponding to each temperature detection assembly is obtained through calculation according to the temperature values; temperature values of all positions of the bridge are obtained through a spline interpolation method, and early warning signals are sent to bridge areas with the temperature lower than or higher than a preset critical value. According to the bridge concrete pouring temperature monitoring method, the accuracy is higher, and early warning signals can be sent out to dangerous places more accurately.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge engineering monitoring, and in particular relates to a method for monitoring bridge concrete pouring temperature. Background Art

[0002] With the rapid development of our society, a large amount of investment has been made in the construction of transportation infrastructure, and bridges are an important part of it. Cable-stayed bridges, as an important type of bridge, are widely used in engineering design. The main beams of many cable-stayed bridges are made of concrete, and their construction technology has become relatively mature after years of development. Since the mechanical properties of concrete are greatly affected by temperature, if the temperature is too low before the concrete solidifies during the construction stage, it is easy to freeze, and if the temperature of the concrete during maintenance is too high, it is easy to crack. Therefore, during the construction and operation and maintenance stages of the bridge, it is necessary to monitor the temperature of the concrete so that corresponding intervention measures can be taken later to prevent the concrete from being too low or too high. However, the existing bridge concrete temperature monitoring method still has unreasonable temperature measurement point settings, resulting in inaccurate measured temperatures, which affects the monitoring effect of the overall temperature field of the bridge concrete. Summary of the invention

[0003] In view of this, the present invention aims to propose a bridge concrete pouring temperature monitoring method to solve the problem of inaccurate temperature measured at the temperature measuring point in the existing bridge concrete temperature monitoring method.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0005] A bridge concrete pouring temperature monitoring method, comprising:

[0006] Obtaining a design drawing of the bridge, and determining a fixing position of the cables on the bridge according to the design drawing;

[0007] During the concrete pouring construction of the bridge, the cables are fixed in the cable guide tubes, and a temperature detection assembly is arranged at a position corresponding to the position below each cable guide tube on the bridge; wherein the temperature detection assembly includes temperature sensors arranged in a plum blossom shape;

[0008] A coordinate system is established along the axial direction of the bridge with a starting point at one end of the bridge as the coordinate origin, and after obtaining the coordinate values ​​of each temperature sensor according to the coordinate system, the coordinate average value corresponding to each temperature detection component is calculated according to the coordinate values;

[0009] Obtaining the temperature value measured by the temperature sensor, and calculating the average temperature value corresponding to each temperature detection component according to the temperature value;

[0010] According to the coordinate average value and temperature average value corresponding to each of the temperature detection components, the temperature value of each part of the bridge is obtained by using the spline interpolation method, and a warning signal is issued for the bridge area where the temperature is lower than or higher than the preset critical value.

[0011] Furthermore, during the concrete pouring construction of the bridge, the cables are fixed in the cable guide tube, and a temperature detection assembly is arranged at a position corresponding to the position below each cable guide tube on the bridge; wherein the temperature detection assembly includes temperature sensors arranged in a plum blossom shape, including:

[0012] During the concrete pouring construction of the bridge, the cables are fixed in the cable guide tubes, and temperature measuring points arranged in a plum blossom shape are reserved at the positions below each cable guide tube on the bridge;

[0013] Place the temperature sensor inside the temperature measuring point.

[0014] Further, the obtaining of the temperature value measured by the temperature sensor and calculating the average temperature value corresponding to each temperature detection component according to the temperature value includes:

[0015] Using a concrete temperature recorder to obtain the temperature value measured by the temperature sensor, and transmitting the temperature value to a computer;

[0016] The computer is used to calculate the temperature value according to the temperature value to obtain the temperature average value corresponding to each temperature detection component.

[0017] Furthermore, the temperature sensor at the center of the temperature detection assembly is arranged at a middle position corresponding to the vertical direction of the bridge.

[0018] Furthermore, the temperature detection component includes five temperature sensors arranged in a plum blossom shape.

[0019] Compared with the prior art, the bridge concrete pouring temperature monitoring method described in the present invention has the following advantages:

[0020] The present invention provides a bridge concrete pouring temperature monitoring method, which arranges temperature measuring points at reasonable positions of the bridge, measures the temperature at the positions in real time, and then fits and calculates the temperature field of the entire bridge, which is more accurate and is conducive to more accurate early warning signals for dangerous places. By using a computer to process the bridge temperature monitoring data, the operation is simple, the accuracy is high, the cost is low, and it is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0022] Figure 1 A schematic flow chart of a bridge concrete pouring temperature monitoring method according to an embodiment of the present invention;

[0023] Figure 2 The present invention is a schematic diagram of the arrangement structure of temperature sensors in a bridge concrete pouring temperature monitoring method according to an embodiment of the present invention.

[0024] Description of reference numerals:

[0025] 1. Cable; 2. Cable guide tube; 3. Bridge; 4. Temperature sensor. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0027] The embodiment of the present invention provides a bridge concrete pouring temperature monitoring method, which can monitor the temperature of the bridge concrete structure during the construction and operation and maintenance stages to prevent the temperature from being too low or too high. Figure 1 and Figure 2 As shown, this monitoring method specifically includes the following steps:

[0028] Step 101: Obtain a design drawing of a bridge 3, and determine a fixing position of a cable 1 on the bridge 3 according to the design drawing.

[0029] Step 102: During the concrete pouring construction of the bridge 3, the cables 1 are fixed in the cable guide tubes 2, and temperature detection components are set at positions below each cable guide tube 2 on the bridge 3; wherein the temperature detection components include temperature sensors 4 arranged in a plum blossom shape.

[0030] Step 103, establish a coordinate system along the axial direction of the bridge 3 with one end of the bridge 3 as the coordinate origin, obtain the coordinate values ​​of each temperature sensor 4 according to the coordinate system, and then calculate the coordinate average value corresponding to each temperature detection component according to the coordinate values.

[0031] Specifically, a computer can be used to establish a coordinate system along the axis of the bridge 3 with one end of the bridge 3 as the coordinate origin, and after obtaining the coordinate values ​​of each temperature sensor 4 according to the coordinate system, the coordinate average value corresponding to each temperature detection component is calculated according to the coordinate values.

[0032] Step 104 , obtaining the temperature value measured by the temperature sensor 4 , and calculating the average temperature value corresponding to each temperature detection component according to the temperature value.

[0033] Step 105: According to the coordinate average and temperature average corresponding to each of the temperature detection components, the temperature value of each part of the bridge 3 is obtained by using the spline interpolation method, and a warning signal is issued to the area of ​​the bridge 3 where the temperature is lower than or higher than the preset critical value. The preset critical value can be determined according to the critical temperature at which concrete is damaged, for example, it can be equal to the critical temperature. In addition, those skilled in the art can also set the preset critical value according to actual needs, which will not be repeated here.

[0034] Preferably, step 102, during the concrete pouring construction of the bridge 3, the cables 1 are fixed in the cable guide tube 2, and a temperature detection assembly is provided at a position corresponding to the position below each cable guide tube 2 on the bridge 3; wherein the temperature detection assembly includes temperature sensors 4 arranged in a plum blossom shape, and specifically includes the following steps:

[0035] Step 1021 , during the concrete pouring construction of the bridge 3 , the cables 1 are fixed in the cable guide tubes 2 , and temperature measuring points arranged in a plum blossom shape are reserved at positions below each cable guide tube 2 on the bridge 3 .

[0036] Step 1022: Place the temperature sensor 4 in the temperature measurement point.

[0037] In actual application, a cable-stayed bridge generally includes a main beam, a cable 1 and a cable guide 2. One end of the cable 1 is fixed in the cable guide 2, and the cable guide 2 is divided into multiple groups and fixed on the main beam. Below the main beam, at positions corresponding to the cable guide 2, temperature measuring points for fixing temperature sensors 4 are provided, and the temperature measuring points are arranged in a plum blossom shape.

[0038] Preferably, step 104, obtaining the temperature value measured by the temperature sensor 4 and calculating the average temperature value corresponding to each temperature detection component according to the temperature value, specifically includes the following steps:

[0039] Step 1041: Use a concrete temperature recorder to obtain the temperature value measured by the temperature sensor 4, and transmit the temperature value to a computer.

[0040] Step 1042: Utilize the computer to calculate the temperature average value corresponding to each temperature detection component according to the temperature value.

[0041] Preferably, the temperature sensor 4 at the center of the temperature detection assembly is arranged at a middle position corresponding to the vertical direction of the bridge 3 .

[0042] Exemplarily, the temperature detection assembly includes five temperature sensors 4 arranged in a plum blossom shape. The lateral spacing and vertical spacing of the five temperature sensors 4 can be determined according to the size of the main beam to cover a larger area of ​​the main beam. Those skilled in the art can make settings according to actual needs, which will not be repeated here.

[0043] In actual application, the specific monitoring of cable-stayed bridges can be carried out according to the following steps:

[0044] Step 1: Determine the fixed position of the cable of the cable-stayed bridge according to the design drawings;

[0045] Step 2: During the concrete construction of the main beam, the cables are fixed in the cable guide tube, and temperature sensors are placed below the bridge deck where the cable guide tube is fixed. The temperature sensors are placed in a plum blossom shape in the temperature measuring points, and five temperature sensors are placed below each cable guide tube. The lateral and vertical spacing of the five temperature sensors is determined according to the size of the main beam, and the central temperature sensor is located in the middle of the main beam in the vertical direction.

[0046] Step 3: Use a concrete temperature recorder to record the temperature measured by each sensor and transmit it to the computer in the monitoring room. The computer can process the temperature measurement values ​​of the temperature sensor through programming.

[0047] Step 4: Take the starting point at one end of the main beam as the coordinate origin, establish a natural coordinate system along the axis of the main beam, and calculate the coordinate value of each temperature sensor.

[0048] Step 5: Take the average temperature of the five sensors at the bottom of each cable guide and the average coordinate as the temperature of that point.

[0049] Step 6: Based on the average temperature and coordinates of the lower part of each cable guide tube, the temperature value of each part of the entire main beam is obtained by using the spline interpolation method. For areas where the temperature is lower than or higher than a certain critical value, an early warning signal is issued.

[0050] The working principle of this monitoring method: Cable-stayed bridges, as an important type of bridge, are widely used in engineering design. Since the mechanical properties of concrete are greatly affected by temperature, the temperature of the main beam concrete of the cable-stayed bridge should be monitored during the construction and operation and maintenance stages. The temperature monitoring method proposed in the present invention, during the concrete construction process of the main beam, five temperature sensors are placed in a plum blossom shape under each cable guide tube, and the temperature measured by each sensor is recorded by a concrete temperature recorder and transmitted to the computer in the monitoring room. Then, according to the coordinate position and temperature value of the sensor, the temperature of each part of the entire main beam is obtained by averaging and interpolation methods, and early warning signals are issued for dangerous areas. This method can use computer programming to process and analyze data in real time, is easy to use, and plays a good role in protecting the construction quality and safety of the bridge.

[0051] The present invention provides a bridge concrete pouring temperature monitoring method, which arranges temperature measuring points at reasonable positions of the bridge, measures the temperature at the positions in real time, and then fits and calculates the temperature field of the entire bridge, which has higher accuracy and is conducive to more accurate early warning signals for dangerous places. By using a computer to process the bridge temperature monitoring data, the operation is simple, the accuracy is high, the cost is low, and it is easy to use.

[0052] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A bridge concrete pouring temperature monitoring method, characterized in that: include: Obtaining a design drawing of the bridge, and determining a fixing position of the cables on the bridge according to the design drawing; During the concrete pouring construction of the bridge, the cables are fixed in the cable guide tubes, and a temperature detection assembly is arranged at a position corresponding to the position below each cable guide tube on the bridge; wherein the temperature detection assembly includes temperature sensors arranged in a plum blossom shape; A coordinate system is established along the axial direction of the bridge with a starting point at one end of the bridge as the coordinate origin, and after obtaining the coordinate values ​​of each temperature sensor according to the coordinate system, the coordinate average value corresponding to each temperature detection component is calculated according to the coordinate values; Obtaining the temperature value measured by the temperature sensor, and calculating the average temperature value corresponding to each temperature detection component according to the temperature value; According to the coordinate average value and temperature average value corresponding to each of the temperature detection components, the temperature value at each location of the bridge is calculated using the spline interpolation method, and an early warning signal is issued for the bridge area where the temperature is lower than or higher than a preset critical value.

2. A bridge concrete pouring temperature monitoring method according to claim 1, characterized in that: During the concrete pouring construction of the bridge, the cables are fixed in the cable guide tube, and a temperature detection assembly is arranged on the bridge at a position corresponding to the position below each cable guide tube; wherein the temperature detection assembly includes temperature sensors arranged in a plum blossom shape, including: During the concrete pouring construction of the bridge, the cables are fixed in the cable guide tubes, and temperature measuring points arranged in a plum blossom shape are reserved at the positions below each cable guide tube on the bridge; Place the temperature sensor inside the temperature measuring point.

3. A bridge concrete pouring temperature monitoring method according to claim 1, characterized in that: The obtaining of the temperature value measured by the temperature sensor and calculating the average temperature value corresponding to each temperature detection component according to the temperature value includes: Using a concrete temperature recorder to obtain the temperature value measured by the temperature sensor, and transmitting the temperature value to a computer; The computer is used to calculate the temperature value according to the temperature value to obtain the temperature average value corresponding to each temperature detection component.

4. A bridge concrete pouring temperature monitoring method according to claim 1, characterized in that: The temperature sensor at the center of the temperature detection component is arranged at the middle position corresponding to the vertical direction of the bridge.

5. A bridge concrete pouring temperature monitoring method according to any one of claims 1 to 4, characterized in that: The temperature detection component includes five temperature sensors arranged in a plum blossom shape.

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