Methods, equipment, and media for real-time control of axial force of steel supports during foundation pit excavation.

Abstract

This invention relates to a method, equipment, and medium for controlling the axial force of steel supports in real time during foundation pit excavation. The control method includes: acquiring the maximum axial force value that the steel supports can withstand under the current working conditions, and storing the maximum axial force value as a maximum axial force critical value; during foundation pit excavation, monitoring and acquiring trigger characteristic signals of retaining structure deformation in real time; after acquiring the trigger characteristic signals of retaining structure deformation, acquiring the axial force of the steel supports in real time, and continuously sending a continuous pressure excavation command to the excavation equipment control terminal until the current axial force value reaches the maximum axial force critical value, and then sending a command to stop pressure excavation to the excavation equipment control terminal. Compared with the prior art, this invention, through real-time monitoring and control, correlation model prediction of maximum axial force, data analysis and modeling technology, and the use of information from multiple monitoring instruments, can effectively control the axial force of steel supports during foundation pit excavation, thereby improving the safety and efficiency of construction.

Description

Technical Field

[0001] This invention relates to the field of foundation pit excavation construction technology, and in particular to a method, equipment, and medium for controlling the axial force of steel supports in real time during foundation pit excavation. Background Technology

[0002] Traditional axial force control of steel supports during foundation pit excavation involves setting a fixed axial force value in the design and inputting this data into a servo control system. During excavation, when deformation of the retaining structure leads to a loss of axial force, the system automatically compensates, restoring the axial force to the pre-set value. However, horizontal deformation of the retaining structure and deep soil cannot return it to its original position, requiring compensation through increased axial force or local reinforcement. This method is relatively fixed and cannot be adjusted in real-time according to the deformation of the retaining structure. Summary of the Invention

[0003] The purpose of this invention is to provide a method, equipment, and medium for controlling the axial force of steel supports in real time during the foundation pit excavation process in order to solve the above-mentioned problems. By using real-time monitoring and control, correlation model prediction of maximum axial force, data analysis and modeling technology, and information from various monitoring instruments, the axial force of steel supports during foundation pit excavation can be effectively controlled, thereby improving the safety and efficiency of construction.

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

[0005] The first aspect of this invention provides a method for controlling the axial force of steel supports in real time during foundation pit excavation, comprising the following steps:

[0006] S1: Obtain the maximum axial force value that the steel support can withstand under the current working conditions, and store the maximum axial force value as the maximum axial force critical value;

[0007] S2: During the excavation of the foundation pit, monitor and acquire the triggering characteristic signals of the deformation of the retaining structure in real time;

[0008] S3: After obtaining the trigger characteristic signal of the retaining structure deformation, the axial force of the steel support is obtained in real time, and a continuous pressure excavation command is continuously sent to the excavation equipment control terminal until the current axial force value reaches the maximum axial force critical value. Then, a command to stop pressure excavation is sent to the excavation equipment control terminal, and an early warning reminder is sent to the user terminal.

[0009] Furthermore, in S1, the maximum axial force that the steel support can withstand under the current working conditions is obtained through a correlation model between the working conditions and the axial force of the steel support.

[0010] Furthermore, the method for constructing the association model includes the following steps:

[0011] Collect historical data: Collect historical data related to steel supports, including engineering cases, measured data, and construction records; this data should include information related to working conditions and axial force of steel supports, such as soil parameters during construction, type and size of support structure, construction methods, and working conditions.

[0012] Data preprocessing: The collected historical data is preprocessed, including data cleaning, outlier removal, and missing value imputation; this ensures the accuracy and integrity of the data to improve the reliability of subsequent analysis.

[0013] Data analysis and modeling: Analyze historical data using appropriate data analysis and modeling techniques. Analyze the data using statistical methods or machine learning to construct the relationship between operating conditions and the axial force of the steel support, and establish a correlation model.

[0014] Furthermore, in S2, the monitoring signals output by the monitoring instruments are acquired in real time, and the triggering characteristic signals of the enclosure deformation are obtained from the monitoring signals. Commonly used monitoring instruments include displacement gauges, strain gauges, inclinometers, convergence gauges, etc.

[0015] Furthermore, in S2, the process of obtaining the triggering characteristic signal of the enclosure deformation from the monitoring signal is as follows:

[0016] Obtain the preset deformation value and use it as the deformation trigger threshold;

[0017] The deformation value acquired in real time is compared with the deformation trigger threshold. When the acquired deformation value is greater than the deformation trigger threshold, it is considered that a trigger feature signal has been acquired.

[0018] Furthermore, in S3, the axial force of the steel support is acquired in real time based on the axial force information output by the axial force measuring instrument. A dedicated axial force measuring instrument can be used to acquire the axial force information of the steel support in real time. Commonly used axial force measuring instruments include tension gauges, strain gauges, and pressure sensors. These instruments can directly measure the magnitude of the axial force on the steel support through sensors or strain gauges, and transmit the data to the monitoring system for real-time monitoring and recording.

[0019] Furthermore, in S3, pressure excavation commands are continuously sent to the excavating equipment control terminal until the current axial force value reaches the maximum critical value:

[0020] When the current axial force value reaches 90% of the maximum critical axial force value, a command is sent to the excavation equipment control terminal to reduce the pressure excavation rate.

[0021] Furthermore, in S3, the process of continuously sending pressurized excavation commands to the excavating equipment control terminal also includes:

[0022] The real-time axial force of the steel support is compared with 90% of the maximum axial force critical value. When the real-time axial force of the steel support is less than 90% of the maximum axial force critical value, a continuous pressure excavation command is continuously sent to the excavation equipment control terminal. When the real-time axial force of the steel support is greater than or equal to 90% of the maximum axial force critical value, a command to reduce the pressure excavation rate is sent to the excavation equipment control terminal, and the pressure excavation rate is adjusted to 50% of the previous rate.

[0023] A second aspect of the present invention provides an electronic device, including a memory and a processor, wherein the processor is used to execute a program in the memory to implement the method for controlling the axial force of steel supports in real time during the excavation of a foundation pit as described above.

[0024] A third aspect of the present invention provides a storage medium containing computer-executable instructions, which, when executed by a computer processor, is used to perform the method for controlling the axial force of steel supports in real time during the excavation of a foundation pit as described above.

[0025] Compared with the prior art, the present invention has the following technical advantages:

[0026] 1) This method can achieve more intelligent and dynamic axial force control of steel supports, and can automatically adjust the axial force according to the real-time deformation, so as to control the deformation of the enclosure to the greatest extent and protect the surrounding environment;

[0027] 2) This solution, by monitoring the triggering characteristic signals of the retaining structure deformation and the axial force of the steel supports in real time, can promptly grasp the situation during the foundation pit excavation process and send commands to the excavation equipment control terminal for control. This real-time capability can effectively reduce potential safety risks and the possibility of construction accidents.

[0028] 3) This solution establishes a correlation model to model and analyze the relationship between working conditions and the axial force of the steel support, which can accurately predict the maximum axial force that the steel support can withstand under the current working conditions. Thus, during actual construction, the axial force of the steel support can be controlled based on the predicted maximum critical value, ensuring the safety and stability of the construction.

[0029] 4) This scheme utilizes appropriate data analysis and modeling techniques to process and analyze historical data in order to extract key information and establish correlation models. This allows for full utilization of existing data resources, improves data reliability and analytical accuracy, and provides strong support for real-time control. Detailed Implementation

[0030] The present invention will now be described in detail with reference to specific embodiments, but this is by no means a limitation thereof. Any structural / module names, control modes, algorithms, processes, etc., not explicitly described in this technical solution are considered common technical features disclosed in the prior art.

[0031] Example 1

[0032] The first aspect of this invention provides a method for controlling the axial force of steel supports in real time during foundation pit excavation, comprising the following steps:

[0033] S1: Obtain the maximum axial force value that the steel support can withstand under the current working conditions, and store the maximum axial force value as the maximum axial force critical value;

[0034] Among them, the maximum axial force that the steel support can withstand under the current working conditions is obtained through the correlation model between the working conditions and the axial force of the steel support.

[0035] The method for constructing the association model includes the following steps:

[0036] Collect historical data: Collect historical data related to steel supports, including engineering cases, measured data, and construction records; this data should include information related to working conditions and axial force of steel supports, such as soil parameters during construction, type and size of support structure, construction methods, and working conditions.

[0037] Data preprocessing: The collected historical data is preprocessed, including data cleaning, outlier removal, and missing value imputation; this ensures the accuracy and integrity of the data to improve the reliability of subsequent analysis.

[0038] Data analysis and modeling: Analyze historical data using appropriate data analysis and modeling techniques. Analyze the data using statistical methods or machine learning to construct the relationship between operating conditions and the axial force of the steel support, and establish a correlation model.

[0039] Maximum axial force prediction based on correlation model: By establishing a correlation model, the relationship between working conditions and the axial force of the steel support is modeled and analyzed, which can accurately predict the maximum axial force value that the steel support can withstand under the current working conditions. Thus, during actual construction, the axial force of the steel support can be controlled based on the predicted maximum axial force critical value, ensuring the safety and stability of construction.

[0040] Data analysis and modeling techniques: This solution utilizes appropriate data analysis and modeling techniques to process and analyze historical data to extract key information and build correlation models. This fully leverages existing data resources, improves data reliability and analytical accuracy, and provides strong support for real-time control.

[0041] S2: During the excavation of the foundation pit, monitor and acquire the triggering characteristic signals of the deformation of the retaining structure in real time;

[0042] The system acquires monitoring signals output by monitoring instruments in real time and extracts trigger characteristic signals of enclosure deformation from these signals. Commonly used monitoring instruments include displacement gauges, strain gauges, inclinometers, and convergence meters.

[0043] In practice, the process of obtaining the triggering characteristic signal of the enclosure deformation from the monitoring signal is as follows:

[0044] Obtain the preset deformation value and use it as the deformation trigger threshold;

[0045] The deformation value acquired in real time is compared with the deformation trigger threshold. When the acquired deformation value is greater than the deformation trigger threshold, it is considered that a trigger feature signal has been acquired.

[0046] In practice, by monitoring the triggering signals of the retaining structure deformation and the axial force of the steel supports in real time, the situation during the excavation process can be grasped in a timely manner, and commands can be sent to the control terminal of the excavation equipment in real time for control. This real-time capability can effectively reduce potential safety risks and the possibility of construction accidents.

[0047] Various monitoring instruments, such as displacement gauges, strain gauges, and inclinometers, can be used to monitor and acquire triggering characteristic signals of retaining structure deformation in real time. These instruments can provide accurate monitoring data and exchange information with the excavation equipment control terminal in real time, enabling precise control of the foundation pit excavation process.

[0048] In S3, after acquiring the trigger characteristic signal of the retaining structure deformation, the axial force of the steel support is acquired in real time, and a continuous pressure excavation command is continuously sent to the excavation equipment control terminal until the current axial force value reaches the maximum axial force critical value. Then, a command to stop pressure excavation is sent to the excavation equipment control terminal, and an early warning reminder is sent to the user terminal.

[0049] The axial force of the steel support is acquired in real time based on the axial force information output by the axial force measuring instrument. Specialized axial force measuring instruments can be used to acquire the axial force information of the steel support in real time. Commonly used axial force measuring instruments include tension gauges, strain gauges, and pressure sensors. These instruments can directly measure the magnitude of the axial force on the steel support through sensors or strain gauges, and transmit the data to the monitoring system for real-time monitoring and recording.

[0050] The solution employs specialized axial force measuring instruments, such as tension gauges, strain gauges, and pressure sensors, to acquire real-time axial force information of the steel supports. These instruments can directly measure the magnitude of the axial force on the steel supports and transmit the data to the monitoring system for real-time monitoring and recording, ensuring the accuracy and reliability of the axial force data.

[0051] During the process of continuously sending pressurized excavation commands to the excavating equipment control terminal until the current axial force value reaches the maximum critical value:

[0052] When the current axial force value reaches 90% of the maximum critical axial force value, a command is sent to the excavation equipment control terminal to reduce the pressure excavation rate.

[0053] In practice, the process involves continuously sending pressurized excavation commands to the excavation equipment control terminal, and also includes:

[0054] In practice, the axial force of the steel support is compared with 90% of the maximum critical value in real time. When the axial force of the steel support is less than 90% of the maximum critical value, a continuous pressure excavation command is sent to the excavation equipment control terminal. When the axial force of the steel support is greater than or equal to 90% of the maximum critical value, a command to reduce the pressure excavation rate is sent to the excavation equipment control terminal, and the pressure excavation rate is adjusted to 50% of the previous rate.

[0055] When the above method is applied to the steel support axial force servo system, the axial force value applied by the steel support axial force servo system is dynamically adjusted according to the deformation of the foundation pit retaining structure. For example, if the net distance between the foundation pit retaining structure and the initial standard value of axial force given in the design is 200 tons, and the standard value and the ultimate value of axial force (assumed to be 300 tons) are pre-input into the servo system before construction, then within the range of 200 to 300 tons, if the retaining structure deforms and shrinks, the servo system will automatically start the control program to actively control the shrinkage displacement of the retaining body within the range of 200 to 300 tons. If the automatic control occurs within the range of 200 to 300 tons and the retaining body expands outward, the system will also automatically stop working (stopping at 300 tons), thereby controlling the continued shrinkage or expansion deformation of the retaining structure.

[0056] This embodiment also proposes a control device for the real-time axial force of steel supports during foundation pit excavation. This device includes a processor and a memory, which are coupled. The memory stores program instructions, and when the program instructions stored in the memory are executed by the processor, the aforementioned task management method is implemented. The processor can be a general-purpose processor, including a Central Processing Unit (CPU), a Network Processor (NP), etc.; it can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. The memory may include Random Access Memory (RAM) and may also include Non-Volatile Memory, such as at least one disk storage device. The memory can be an internal memory of the Random Access Memory (RAM) type. The processor and memory can be integrated into one or more independent circuits or hardware, such as an Application Specific Integrated Circuit (ASIC). It should be noted that when the computer program in the aforementioned memory is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, electronic device, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of the present invention.

[0057] This embodiment also proposes a computer-readable storage medium storing computer instructions for instructing a computer to execute the aforementioned method for controlling the axial force of steel supports in real time during foundation pit excavation. The storage medium can be an electronic medium, magnetic medium, optical medium, electromagnetic medium, infrared medium, or a semiconductor system or propagation medium. The storage medium may also include semiconductor or solid-state memory, magnetic tape, removable computer disk, random access memory (RAM), read-only memory (ROM), hard disk, and optical disc. Optical discs may include optical disc-read-only memory (CD-ROM), optical disc-read / write (CD-RW), and DVD.

[0058] The above description of the embodiments is provided to enable those skilled in the art to understand and use the invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the invention should be within the protection scope of the present invention.

Claims

1. A method for controlling the axial force of steel supports in real time during foundation pit excavation, characterized in that, Includes the following steps: S1: Obtain the maximum axial force value that the steel support can withstand under the current working conditions, and store the maximum axial force value as the maximum axial force critical value; S2: During the excavation of the foundation pit, monitor and acquire the triggering characteristic signals of the deformation of the retaining structure in real time; S3: After obtaining the trigger characteristic signal of the retaining structure deformation, the axial force of the steel support is obtained in real time, and a continuous pressure excavation command is continuously sent to the excavation equipment control terminal until the current axial force value reaches the maximum axial force critical value. Then, a command to stop pressure excavation is sent to the excavation equipment control terminal, and an early warning reminder is sent to the user terminal. In S2, the monitoring signal output by the monitoring instrument is acquired in real time, and the trigger characteristic signal of the enclosure deformation is obtained from the monitoring signal; In S2, the process of obtaining the triggering characteristic signal of the enclosure deformation from the monitoring signal is as follows: Obtain the preset deformation value and use it as the deformation trigger threshold; The deformation value acquired in real time is compared with the deformation trigger threshold. When the acquired deformation value is greater than the deformation trigger threshold, it is considered that a trigger feature signal has been acquired.

2. The method for controlling the axial force of steel supports in real time during foundation pit excavation according to claim 1, characterized in that, In S1, the maximum axial force that the steel support can withstand under the current working conditions is obtained through the correlation model between the working conditions and the axial force of the steel support.

3. The method for controlling the axial force of steel supports in real time during foundation pit excavation according to claim 2, characterized in that, The method for constructing the association model includes the following steps: Collect historical data: Collect historical data related to steel supports, including engineering cases, measured data, and construction records; Data preprocessing: The collected historical data is preprocessed, including data cleaning, outlier removal, and missing value filling; Data analysis and modeling: Analyze data using statistical or machine learning methods, construct the relationship between working conditions and axial force of steel supports, and establish a correlation model.

4. The method for controlling the axial force of steel supports in real time during foundation pit excavation according to claim 1, characterized in that, In S3, the axial force of the steel support is acquired in real time based on the axial force information output by the axial force measuring instrument.

5. The method for controlling the axial force of steel supports in real time during foundation pit excavation according to claim 4, characterized in that, In S3, pressure excavation commands are continuously sent to the excavation equipment control terminal until the current axial force value reaches the maximum critical value: When the current axial force value reaches 90% of the maximum critical axial force value, a command is sent to the excavation equipment control terminal to reduce the pressure excavation rate.

6. The method for controlling the axial force of steel supports in real time during foundation pit excavation according to claim 5, characterized in that, In S3, the process of continuously sending pressurized excavation commands to the excavation equipment control terminal also includes: The real-time axial force of the steel support is compared with 90% of the maximum axial force critical value. When the real-time axial force of the steel support is less than 90% of the maximum axial force critical value, a continuous pressure excavation command is continuously sent to the excavation equipment control terminal. When the real-time axial force of the steel support is greater than or equal to 90% of the maximum axial force critical value, a command to reduce the pressure excavation rate is sent to the excavation equipment control terminal, and the pressure excavation rate is adjusted to 50% of the previous rate.

7. An electronic device, comprising a memory and a processor, characterized in that, The processor is used to execute the program in the memory to implement the method for controlling the axial force of the steel support during the excavation of the foundation pit as described in any one of claims 1 to 6.

8. A storage medium containing computer-executable instructions, characterized in that, When the storage medium of the computer-executable instructions is executed by a computer processor, it is used to perform the method for controlling the axial force of the steel support in real time during the excavation of the foundation pit as described in any one of claims 1 to 6.