Method and device for regulating and controlling axial force of steel support

Abstract

The invention discloses a method and a device for regulating and controlling axial force of a steel support. The steel support axial force regulation and control method comprises the steps that current deformation data of a foundation pit support structure are obtained; obtaining steel support axial force data applied to the foundation pit support structure according to the current deformation data of the foundation pit support structure and the axial force control model; after the steel support servo equipment applies the steel support axial force corresponding to the steel support axial force data to the foundation pit support structure, updating the current deformation data of the foundation pit support structure; and optimizing the axial force control model according to the current deformation data of the foundation pit support structure until the optimized axial force control model controls the current deformation data generated by the steel support axial force applied to the foundation pit support structure by the steel support servo equipment to meet a preset deformation condition. According to the method, the problem of mutual interference between steel support axial forces of different foundation pit support structures can be solved, and accurate control over the steel support axial forces is achieved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of foundation pit construction, and in particular to a method and device for regulating the axial force of a steel support. Background Art

[0002] With the construction of underground rail transit, the environment around foundation pit projects has become increasingly complex. Support shaft force servo systems are commonly used in projects to support foundation pit retaining structures during foundation pit excavation to ensure that the deformation of the foundation pit during construction is within a strict range.

[0003] At present, the axial force servo system of steel support is precisely controlled by taking the axial force of steel support in the process of foundation pit support as the measurement and control target, and the axial force of the system is loaded and unloaded with the increase and decrease of the pressure on the side wall of the foundation pit. However, the pressure on the side wall of the foundation pit is a passive load caused by the soil pressure. There is no specific mathematical relationship between the lateral displacement of the retaining structure and the axial force, and the axial force cannot be finely regulated with the deformation of the foundation pit. In addition, there is a certain correlation between the forces between each steel support, and the loading and unloading of each steel support will affect the forces of the adjacent steel supports. Therefore, it is defective to take the axial force of the steel support in the process of foundation pit support as the measurement and control target. Summary of the invention

[0004] The present invention provides a steel support axial force control method and device, so as to realize accurate control of the steel support axial force and control the deformation of the enclosure structure in real time.

[0005] In a first aspect, an embodiment of the present invention provides a method for regulating the axial force of a steel support, the method comprising:

[0006] Obtain the current deformation data of the foundation pit retaining structure;

[0007] Obtaining steel support axial force data applied to the foundation pit retaining structure according to current deformation data of the foundation pit retaining structure and an axial force control model;

[0008] After the steel support servo device applies the steel support axial force corresponding to the steel support axial force data to the foundation pit retaining structure, updating the current deformation data of the foundation pit retaining structure;

[0009] The axial force control model is optimized according to the current deformation data of the foundation pit retaining structure until the current deformation data generated by the steel support axial force applied to the foundation pit retaining structure by the steel support servo device controlled by the optimized axial force control model meets the preset deformation conditions.

[0010] In a second aspect, an embodiment of the present invention further provides a steel support axial force control system, the system comprising a plurality of steel support servo devices and a data processing center; each of the steel support servo devices is communicatively connected to the data processing center; the data processing center is used to execute the steel support axial force control method described in any embodiment of the present invention, and the data processing center comprises:

[0011] An acquisition unit, used for acquiring current deformation data of the foundation pit retaining structure;

[0012] A steel support controller, used for obtaining the steel support axial force data applied to the foundation pit retaining structure according to the current deformation data of the foundation pit retaining structure and the axial force control model;

[0013] The acquisition unit is also used to update the current deformation data of the foundation pit retaining structure after the steel support servo device applies the steel support axial force corresponding to the steel support axial force data to the foundation pit retaining structure;

[0014] The steel support controller is also used to optimize the axial force control model according to the current deformation data of the foundation pit retaining structure until the current deformation data generated by the steel support axial force applied to the foundation pit retaining structure by the steel support servo device controls the optimized axial force control model to meet the preset deformation conditions.

[0015] The present invention provides a steel support axial force control method and device, the steel support axial force control method comprising: acquiring real-time deformation data of a foundation pit retaining structure; obtaining steel support axial force data applied to the foundation pit retaining structure according to the real-time deformation data and an axial force control model of the foundation pit retaining structure, thereby applying the steel support axial force of the foundation pit retaining structure through the steel support axial force data; after obtaining the steel support axial force according to the steel support axial force data through a steel support servo device and applying the steel support axial force to the foundation pit retaining structure, obtaining the actual deformation value of the foundation pit retaining structure again to optimize the axial force control model according to the actual deformation value; controlling the steel support axial force applied to the foundation pit retaining structure by the steel support servo device according to the optimized axial force control model to form a closed-loop control system, continuously and automatically adjusting the axial force control model, controlling the deformation of the foundation pit retaining structure in real time, and gradually eliminating the mutual interference between the steel support axial forces applied to different foundation pit retaining structures, until the actual deformation value of the foundation pit retaining structure meets the preset deformation condition to control the deformation of the retaining structure in real time. The present invention can solve the problem of mutual interference between the axial forces of steel supports of different foundation pit retaining structures, and realize accurate control of the axial forces of the steel supports. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A flow chart of a steel support axial force control method provided in an embodiment of the present invention.

[0017] Figure 2A flow chart of another steel support axial force control method provided in an embodiment of the present invention.

[0018] Figure 3 A schematic diagram of the control principle of the axial force of a steel support provided in an embodiment of the present invention.

[0019] Figure 4 Another schematic diagram of regulating the axial force of a steel support provided in an embodiment of the present invention.

[0020] Figure 5 A structural schematic diagram of a steel support axial force control system provided in an embodiment of the present invention.

[0021] Figure 6 A schematic diagram of the structure of a data processing center provided in an embodiment of the present invention.

[0022] Figure 7 A schematic structural diagram of a steel support servo device provided in an embodiment of the present invention.

[0023] Figure 8 A schematic structural diagram of a servo cylinder drive unit provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0024] 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.

[0025] The embodiment of the present invention provides a steel support axial force control method, which is applicable to the application scenario of controlling the steel support axial force of the foundation pit retaining structure during the foundation pit support process. The method can be executed by a steel support axial force control device, which can be implemented in the form of hardware and / or software. Figure 1 A flow chart of a steel support axial force control method provided by an embodiment of the present invention, such as Figure 1 As shown, the steel support axial force control method includes:

[0026] S110. Obtain current deformation data of the foundation pit retaining structure.

[0027] Among them, the foundation pit retaining structure mainly bears the water pressure and soil pressure generated by the unloading of the foundation pit excavation, and transfers this pressure to the support. It is a temporary retaining wall structure for stabilizing the foundation pit. The foundation pit retaining structure can ensure the stability of the foundation pit and the safety and convenience of the operation in the pit, so that the displacement of the soil at the bottom of the pit and outside the pit is controlled within a certain range, ensuring the normal use of adjacent buildings and municipal facilities. The side wall pressure of the foundation pit is a passive load caused by soil pressure. There is no specific mathematical relationship between the lateral displacement of the foundation pit retaining structure and the axial force of the steel support. Therefore, it is necessary to obtain the real-time current deformation data of the foundation pit retaining structure to continuously and automatically adjust the steel support axial force applied to the foundation pit retaining structure, and control the deformation of the pit retaining structure in real time, so as to gradually eliminate the mutual interference between the steel support axial forces applied to each foundation pit retaining structure.

[0028] S120. Obtaining steel support axial force data applied to the foundation pit retaining structure according to the current deformation data of the foundation pit retaining structure and the axial force control model.

[0029] Among them, the axial force control model can be established before obtaining the current deformation data of the foundation pit retaining structure. Exemplarily, the axial force control model can be a PID controller, and the PID parameters of the PID controller are adjusted and optimized through the historical data of the steel support servo equipment.

[0030] Specifically, after obtaining the current deformation data of the foundation pit retaining structure, the current deformation data of the foundation pit retaining structure is input into the axial force control model to obtain the steel support axial force data applied to the foundation pit retaining structure. According to the steel support axial force data applied to the foundation pit retaining structure, the steel support servo equipment can generate the corresponding steel support axial force, which is applied to the foundation pit retaining structure to control the deformation of the foundation pit retaining structure.

[0031] S130. After the steel support servo device applies the steel support axial force corresponding to the steel support axial force data to the foundation pit retaining structure, the current deformation data of the foundation pit retaining structure is updated.

[0032] Among them, the steel support servo equipment can achieve the purpose of ensuring the safety of the foundation pit and controlling the deformation of the foundation pit by adjusting the axial force of the foundation pit support system. In an embodiment of the present invention, the steel support servo equipment can generate corresponding steel support axial force according to the steel support axial force data, apply it to the foundation pit retaining structure, and control the deformation of the foundation pit retaining structure, so that the foundation pit retaining structure is always within a reasonable force range, thereby reducing construction risks and enhancing construction safety.

[0033] Specifically, after obtaining the steel support axial force according to the steel support axial force data through the steel support servo device and applying the steel support axial force to the foundation pit retaining structure, the current deformation data of the foundation pit retaining structure is updated, so as to optimize the axial force control model according to the current deformation data. Exemplarily, the current deformation data includes the actual deformation value of the foundation pit retaining structure, and the actual deformation value can be compared with the preset target deformation value to calculate the current deformation error. The calculated error is used to adjust the weight and bias of the network through the back propagation algorithm of the BP neural network to further optimize the parameters of the axial force control model, thereby achieving further adjustment of the axial force control model and improving the precise control of the steel support axial force.

[0034] S140. Optimize the axial force control model according to the current deformation data of the foundation pit retaining structure until the current deformation data generated by the axial force of the steel support applied to the foundation pit retaining structure by the steel support servo device controlled by the optimized axial force control model meets the preset deformation conditions.

[0035] It should be noted that in the same foundation pit, there can be multiple steel support servo devices and corresponding foundation pit retaining structures to support the foundation pit. There is a certain correlation between the forces between the foundation pit retaining structures. The loading and unloading of the steel support axial force on each foundation pit retaining structure will affect the force on the adjacent foundation pit retaining structure. Therefore, it is necessary to continuously control the steel support axial force and axial force control model applied to the foundation pit retaining structure, gradually eliminate the mutual interference between the steel supports, and achieve stable and precise control of the system. In an embodiment of the present invention, each axial force control model controls a corresponding steel support servo device, and each steel support servo device applies a corresponding steel support axial force to a foundation pit retaining structure.

[0036] Specifically, the axial force of the steel support applied to the foundation pit retaining structure by the steel support servo device is controlled according to the optimized axial force control model. Optionally, the axial force control model can be repeatedly optimized according to the actual deformation value, and the axial force of the steel support applied to the foundation pit retaining structure by the steel support servo device can be repeatedly controlled according to the optimized axial force control model to form a closed-loop control system, thereby continuously and automatically adjusting the axial force outputted to the steel support of the foundation pit retaining structure by each steel support servo device, continuously optimizing the axial force control model corresponding to each steel support servo device, and controlling the deformation of the retaining structure in real time. During multiple cycles and parameter optimization, the axial force outputted to the steel support of the foundation pit retaining structure by each steel support servo device is adjusted to gradually eliminate mutual interference between steel supports, thereby achieving stable and precise control of the system.

[0037] The embodiment of the present invention provides a steel support axial force control method, which includes: obtaining current deformation data of a foundation pit retaining structure; obtaining steel support axial force data applied to the foundation pit retaining structure according to the current deformation data of the foundation pit retaining structure and an axial force control model, thereby applying the steel support axial force of the foundation pit retaining structure through the steel support axial force data; after the steel support servo device applies the steel support axial force corresponding to the steel support axial force data to the foundation pit retaining structure, updating the current deformation data of the foundation pit retaining structure; optimizing the axial force control model according to the current deformation data of the foundation pit retaining structure, forming a closed-loop control system, continuously and automatically adjusting the axial force control model, controlling the deformation of the foundation pit retaining structure in real time, and gradually eliminating the mutual interference between the steel support axial forces applied to different foundation pit retaining structures, until the current deformation data generated by the steel support axial force applied to the foundation pit retaining structure by the optimized axial force control model controls the steel support servo device to meet the preset deformation condition. The present invention can solve the problem of mutual interference between the steel support axial forces of different foundation pit retaining structures and realize accurate control of the steel support axial force.

[0038] The embodiment of the present invention also provides another method for regulating the axial force of a steel support. Figure 2 A flow chart of another steel support axial force control method provided by an embodiment of the present invention, such as Figure 2 As shown, the axial force control model is optimized according to the current deformation data of the foundation pit retaining structure, until the current deformation data generated by the axial force of the steel support applied to the foundation pit retaining structure by the optimized axial force control model controlling the steel support servo device meets the preset deformation conditions, including:

[0039] S210. Adjust the steel support axial force applied to the foundation pit retaining structure by the steel support servo device through the optimized axial force control model and the current deformation data of the foundation pit retaining structure.

[0040] Specifically, the axial force control model can be repeatedly optimized according to the actual deformation value of the foundation pit retaining structure, and the steel support axial force applied to the foundation pit retaining structure by the steel support servo device can be repeatedly controlled according to the optimized axial force control model to form a closed-loop control system, thereby continuously and automatically adjusting the axial force output by each steel support servo device to the steel support axial force of the foundation pit retaining structure, continuously optimizing the axial force control model corresponding to each steel support servo device, and controlling the deformation of the retaining structure in real time.

[0041] S220. Under the action of the adjusted steel support axial force, the deformation rate and deformation trend of the foundation pit retaining structure are obtained according to the actual deformation value of the foundation pit retaining structure.

[0042] Specifically, under the action of the adjusted steel support axial force, the deformation rate of the foundation pit retaining structure can be obtained according to the actual deformation value and deformation time of the foundation pit retaining structure, and the deformation value of the foundation pit retaining structure at the next moment can be obtained according to the deformation rate of the foundation pit retaining structure, thereby obtaining the deformation value trend of the foundation pit retaining structure.

[0043] Optionally, the preset deformation conditions include that the actual deformation value of the foundation pit retaining structure is less than the preset target deformation value, and the deformation rate of the foundation pit retaining structure is less than the preset deformation rate, and the deformation trend of the foundation pit retaining structure is less than the preset deformation trend; wherein, the current deformation data includes the actual deformation value of the foundation pit retaining structure.

[0044] S230. When the actual deformation value of the foundation pit retaining structure is less than the preset target deformation value, and the deformation rate of the foundation pit retaining structure is less than the preset deformation rate, and the deformation trend of the foundation pit retaining structure is less than the preset deformation trend, stop adjusting the steel support axial force applied by the foundation pit retaining structure and the control parameters in the steel support controller.

[0045] Specifically, in the process of multiple cycles of controlling the steel support axial force control and parameter optimization of the axial force control model, when the actual deformation value of the foundation pit retaining structure is less than the preset target deformation value, and the deformation rate of the foundation pit retaining structure is less than the preset deformation rate, and the deformation trend of the foundation pit retaining structure is less than the preset deformation trend, then the regulation cycle enters the stable cycle, indicating that the mutual interference between the steel supports has been gradually eliminated, the problem of mutual interference between the axial forces of the steel supports of different foundation pit retaining structures has been solved, and the precise control of the axial force of the steel supports has been achieved.

[0046] Optionally, when the current deformation data of the foundation pit retaining structure does not meet the preset deformation condition, it also includes:

[0047] When the actual deformation value of the foundation pit retaining structure is greater than or equal to the preset target deformation value, a first warning message is issued; when the deformation rate of the foundation pit retaining structure is greater than or equal to the preset deformation rate, a second warning message is issued; when the deformation trend of the foundation pit retaining structure is greater than or equal to the preset deformation trend, a third warning message is issued.

[0048] Specifically, different early warning information can be set according to the actual deformation value of the foundation pit retaining structure, the deformation rate of the foundation pit retaining structure and the deformation trend of the foundation pit retaining structure, so that the foundation pit workers can timely discover the deformation state of the foundation pit retaining structure and then take countermeasures, thereby improving the safety of foundation pit construction.

[0049] Optionally, the axial force control model includes a PID control model, and the axial force control model is optimized according to current deformation data of the foundation pit retaining structure, including:

[0050] The actual deformation value is compared with the preset target deformation value to obtain the deformation error value; the PID control model is adjusted according to the deformation error value and based on the neural network model. Specifically, the actual deformation value is compared with the preset target deformation value to obtain the deformation error value, and based on the deformation error value, the weight and bias of the neural network are adjusted through the back propagation algorithm of the BP neural network to further optimize the parameters of the PID controller model.

[0051] Figure 3 A schematic diagram of the control principle of the axial force of a steel support provided in an embodiment of the present invention, Figure 4 Another schematic diagram of regulating the axial force of a steel support provided by an embodiment of the present invention. Figure 3As shown, in an embodiment of the present invention, the axial force control model is a PID control model, and the steel support axial force data applied to the foundation pit retaining structure is obtained according to the real-time deformation data of the foundation pit retaining structure and the axial force control model, and the steel support axial force, that is, the initial axial force F0, is obtained by the steel support servo device according to the steel support axial force data. After the initial axial force F0 is applied to the foundation pit retaining structure, due to the influence of the foundation pit excavation conditions and the surrounding conditions, the deformation trend of the foundation pit retaining structure changes, and the steel support axial force is cyclically regulated through the regulation period t, and the steel support axial force applied to the foundation pit retaining structure by the steel support servo device is adjusted through the optimized axial force control model and the real-time deformation data of the foundation pit retaining structure, and under the action of the adjusted steel support axial force, the deformation rate and deformation trend of the foundation pit retaining structure are obtained according to the actual deformation value of the foundation pit retaining structure. When the actual deformation value of the foundation pit retaining structure is less than the preset target deformation value, the actual deformation value is compared with the preset target deformation value to obtain a deformation error value, which can also be called an expected error e. When the expected error e is less than 0, and the deformation rate k of the foundation pit retaining structure is less than 0, and the deformation trend x of the foundation pit retaining structure is less than the preset deformation trend X0, stop adjusting the axial force of the steel support applied by the foundation pit retaining structure and the control parameters in the steel support controller, and finally make the axial force of the steel support applied on the foundation pit retaining structure and the deformation data of the foundation pit retaining structure have a finite element mapping relationship. However, if the expected error e≥0, the first warning message is issued, and the steel support axial force applied to the foundation pit retaining structure by the steel support servo device is continuously adjusted through the optimized axial force control model and the real-time deformation data of the foundation pit retaining structure; when the deformation rate k of the foundation pit retaining structure is <0, the second warning message is issued, and the steel support axial force applied to the foundation pit retaining structure by the steel support servo device is continuously adjusted through the optimized axial force control model and the real-time deformation data of the foundation pit retaining structure; when the deformation trend x of the deformation trend of the foundation pit retaining structure is ≥ the second preset deformation trend X1, the third warning message is issued, and the axial force control model is continuously optimized and the steel support axial force is continuously adjusted; when the deformation trend x of the deformation trend of the foundation pit retaining structure is < the second preset deformation trend X1, and the deformation trend x is ≥ the preset deformation trend X0, the axial force control model is continuously optimized and the steel support axial force is adjusted. Reference Figure 4 By adjusting the steel support axial force F, the real-time deformation data of the foundation pit retaining structure is controlled within the allowable range X. The minimum value of the allowable range X is the initial 0 value, and the maximum value is the deformation control value X1. The deformation control value X1 is equal to the second preset deformation trend X1. The expected deformation is the expected displacement X0. The expected displacement X0 is equal to the preset deformation trend X0, and the expected error e is also equal to the expected displacement X0. For example, when the deformation trend of the foundation pit retaining structure is deformation trend 2 and deformation trend 3, it is necessary to continue to cyclically optimize the axial force control model and regulate the steel support axial force. When the deformation trend of the foundation pit retaining structure is deformation trend 1, it is not necessary to continue to cyclically optimize the axial force control model and regulate the steel support axial force.

[0052] Optionally, before obtaining the real-time deformation data of the foundation pit retaining structure, the following steps are also included:

[0053] An initial axial force control model and historical operation data are obtained; the initial axial force control model is optimized according to the historical operation data to obtain an axial force control model.

[0054] Specifically, the initial axial force control model is also a PID control model, that is, a PID controller. Each PID controller controls the steel support axial force applied to the foundation pit retaining structure by a steel support servo device, and the historical operation data is the historical operation data of the steel support servo device. Through experimental methods, each PID controller is debugged to determine its initial proportional, integral and differential parameters as initial parameters to meet basic control requirements. By establishing a BP neural network model, the initial parameters of the initial PID controller and the historical operation data of the steel support servo device are used as input data and optimized using a neural network. The optimized parameters output by the neural network are updated to each PID controller, replacing the original initial parameters, and the optimized PID controller, that is, the axial force control model, is obtained. Through this process, the accuracy of the steel support axial force data output by the axial force control model can be improved, so that the steel support axial force output by the steel support servo device meets the actual application requirements.

[0055] Optionally, the initial axial force control model is optimized according to historical operation data to obtain an axial force control model, including:

[0056] According to the historical operation data, the initial axial force control model is optimized based on the neural network model to obtain the axial force control model.

[0057] Specifically, the optimization parameters output by the neural network are updated to each PID controller to replace the original initial parameters, and the optimized PID controller, i.e., the axial force control model, is obtained. This process can improve the accuracy of the steel support axial force data output by the axial force control model, so that the steel support axial force output by the steel support servo device meets the actual application requirements.

[0058] An embodiment of the present invention provides a steel support axial force regulation method, which controls the steel support axial force applied to the foundation pit retaining structure by a steel support servo device according to an optimized axial force control model to form a closed-loop control system, continuously and automatically adjust the axial force control model, and control the deformation of the foundation pit retaining structure in real time, and gradually eliminate the mutual interference between the steel support axial forces applied to different foundation pit retaining structures, until the actual deformation value of the foundation pit retaining structure meets the preset deformation condition, and the deformation of the retaining structure is controlled in real time, which can solve the problem of mutual interference between the steel support axial forces of different foundation pit retaining structures and realize precise control of the steel support axial force.

[0059] The embodiment of the present invention also provides a steel support axial force control system. Figure 5 A structural schematic diagram of a steel support axial force control system provided by an embodiment of the present invention, Figure 6 A schematic diagram of the structure of a data processing center provided by an embodiment of the present invention, such as Figure 5 and Figure 6 As shown, the system includes a plurality of steel support servo devices 120 and a data processing center 110; each steel support servo device 120 is in communication connection with the data processing center 110; the data processing center 110 is used to execute the steel support axial force control method of any embodiment of the present invention, and the data processing center 110 includes:

[0060] The acquisition unit 1101 is used to acquire the current deformation data of the foundation pit retaining structure.

[0061] The steel support controller 1102 is used to obtain the steel support axial force data applied to the foundation pit retaining structure according to the current deformation data of the foundation pit retaining structure and the axial force control model.

[0062] The acquisition unit 1101 is also used to update the current deformation data of the foundation pit retaining structure after the steel support servo device applies the steel support axial force corresponding to the steel support axial force data to the foundation pit retaining structure.

[0063] The steel support controller 1102 is also used to optimize the axial force control model according to the current deformation data of the foundation pit retaining structure until the current deformation data generated by the steel support axial force applied to the foundation pit retaining structure by the optimized axial force control model controls the steel support servo device to meet the preset deformation conditions.

[0064] Among them, the steel support controller 1102 is a PID controller, each PID controller controls a steel support servo device to apply a steel support axial force to the foundation pit retaining structure, and the historical operation data is the historical operation data of the steel support servo device. Through experimental methods, each PID controller can be debugged to determine its initial proportional, integral and differential parameters as initial parameters to meet basic control requirements. It is also possible to establish a BP neural network model, use the initial parameters of the PID controller and the historical operation data of the steel support servo device as input data, and use the neural network for optimization.

[0065] Specifically, in the same foundation pit, there may be multiple steel support servo devices 120 and corresponding foundation pit retaining structures to support the foundation pit. There is a certain correlation between the forces acting on each foundation pit retaining structure. The loading and unloading of the steel support axial force on each foundation pit retaining structure will affect the forces acting on the adjacent foundation pit retaining structures. Therefore, it is necessary to continuously control the steel support axial force and axial force control model applied to the foundation pit retaining structure, gradually eliminate mutual interference between steel supports, and achieve stable and precise control of the system. The current deformation data of the foundation pit retaining structure is acquired by the acquisition unit 1101, and the steel support controller 1102 obtains the steel support axial force data applied to the foundation pit retaining structure according to the current deformation data of the foundation pit retaining structure and the axial force control model. The acquisition unit 1101 is also used to obtain the steel support axial force according to the steel support axial force data through the steel support servo equipment, and update the current deformation data of the foundation pit retaining structure after the steel support axial force is applied to the foundation pit retaining structure. The steel support controller 1102 is also used to optimize the axial force control model according to the current deformation data of the foundation pit retaining structure to control the deformation of the retaining structure in real time. During multiple cycles and parameter optimization processes, the axial force output by each steel support servo equipment to the steel support of the foundation pit retaining structure is adjusted to gradually eliminate mutual interference between steel supports until the current deformation data generated by the steel support axial force applied to the foundation pit retaining structure by the optimized axial force control model controls the steel support servo equipment to meet the preset deformation conditions, thereby achieving stable and precise control of the system.

[0066] An embodiment of the present invention provides a steel support axial force control system, wherein an acquisition unit acquires real-time deformation data of a foundation pit retaining structure, and a steel support controller obtains steel support axial force data applied to the foundation pit retaining structure according to the current deformation data of the foundation pit retaining structure and an axial force control model. The acquisition unit is also used to update the current deformation data of the foundation pit retaining structure after the steel support servo device applies the steel support axial force corresponding to the steel support axial force data to the foundation pit retaining structure. The steel support controller also optimizes the axial force control model according to the current deformation data of the foundation pit retaining structure to form a closed-loop control system, continuously and automatically adjusts the axial force control model, controls the deformation of the foundation pit retaining structure in real time, and gradually eliminates mutual interference between the steel support axial forces applied to different foundation pit retaining structures, until the current deformation data generated by the steel support axial force applied to the foundation pit retaining structure by the optimized axial force control model controls the steel support servo device to meet the preset deformation condition, which can solve the problem of mutual interference between the steel support axial forces of different foundation pit retaining structures and realize precise control of the steel support axial force.

[0067] In the embodiment of the present invention, optionally, the data processing center 110 includes a plurality of steel support controllers 1102 , and each steel support controller 1102 corresponds to a steel support servo device 120 .

[0068] Specifically, each steel support controller 1102 has an axial force control model, and each steel support controller 1102 corresponds to a steel support servo device. Then, each axial force control model controls a steel support servo device, and each steel support servo device applies a steel support axial force to a foundation pit retaining structure, thereby realizing the control of the steel support axial forces output by multiple steel support servo devices 120 respectively.

[0069] Optionally, the data processing center 110 may also include an early warning module, which can send an early warning message to the user's device when the actual deformation value of the foundation pit retaining structure meets the preset conditions, thereby improving the safety of the foundation pit construction. Exemplarily, the user's device can be a mobile phone. Optionally, the early warning module sends a first early warning message when the actual deformation value of the foundation pit retaining structure is greater than or equal to the preset target deformation value; sends a second early warning message when the deformation rate of the foundation pit retaining structure is greater than or equal to the preset deformation rate; and sends a third early warning message when the deformation trend of the foundation pit retaining structure is greater than or equal to the preset deformation trend.

[0070] Figure 7 A schematic diagram of the structure of a steel support servo device provided by an embodiment of the present invention, such as Figure 7 As shown, optionally, the steel support servo device 120 includes a cylinder displacement monitoring unit 121 and a servo cylinder driving unit 122; the cylinder displacement monitoring unit 121 is used to feedback the position of the cylinder in the servo cylinder driving unit 122. The servo cylinder driving unit 122 is used to apply the steel support axial force to the foundation pit retaining structure according to the steel support axial force data.

[0071] Specifically, the steel support servo device 120 is integrated, including a cylinder displacement monitoring unit 121 and a servo cylinder drive unit 122. It can be controlled by a single-chip microcomputer and 5G network communication, powered by a low-voltage 48V power supply and a backup battery (uninterruptible power supply). Multiple steel support servo devices 120 are networked through a wireless network, and the axial force and cylinder displacement data are uploaded based on the communication protocol. The steel support servo device 120 can also upload the foundation pit deformation data based on the communication protocol, perform data filtering processing, solve the deformation rate, and predict the deformation trend in the next stage. The cylinder displacement monitoring unit 121 can be composed of a pressure acquisition sensor and a displacement acquisition sensor, which collects the position data of the cylinder in the servo cylinder drive unit 122 to ensure the application of the axial force. The servo cylinder drive unit 122 applies the steel support axial force to the foundation pit retaining structure according to the steel support axial force data output by the steel support controller 1102, thereby controlling the deformation of the pit retaining structure, thereby gradually eliminating the mutual interference between the steel support axial forces applied to each foundation pit retaining structure.

[0072] Figure 8 A schematic diagram of the structure of a servo cylinder drive unit provided in an embodiment of the present invention is shown in FIG. Figure 8As shown, optionally, the servo cylinder drive unit 122 includes a servo motor 1201 , a booster unit 1202 , a cylinder 1203 , a proportional valve 1204 and two hydraulic locks 1205 .

[0073] The output end of the servo motor 1201 , the booster unit 1202 and the oil inlet of the cylinder 1203 are connected in sequence through an oil pipe. The servo motor 1201 is used to draw hydraulic oil to the booster unit 1202 , and the booster unit 1202 is used to boost the hydraulic oil and then deliver it to the cylinder 1203 .

[0074] The proportional valve 1204 is disposed on the oil pipe of the oil outlet of the oil cylinder 1203 , and the proportional valve 1204 is used to control the discharge of the hydraulic oil in the oil cylinder 1203 .

[0075] The two hydraulic locks 1205 are respectively provided with an oil inlet and an oil outlet of the oil cylinder 1203 , and the hydraulic locks 1205 are used to control the volume of the hydraulic oil in the oil cylinder 1203 to remain unchanged.

[0076] In addition, the servo cylinder drive unit 122 also includes a reversing valve 1206, a pressure sensor 1207, and a relief valve 1208. The reversing valve 1206 can control the hydraulic oil from the booster unit 1202 to be input into the cylinder 1203, and can also control the hydraulic oil from the cylinder 1203. The pressure sensor 1207 can detect the oil pressure of the hydraulic oil at the location. The relief valve 1208 can maintain the pressure in the servo cylinder drive unit 122 to be nearly constant, and at the same time, the excess hydraulic oil in the servo cylinder drive unit 122 can overflow back to the oil tank, which plays a role in safety protection.

[0077] Specifically, the piston is pushed by hydraulic oil in the oil cylinder 1203, so that the steel support axial force can be generated and applied to the foundation pit retaining structure. The hydraulic oil can be transferred from the low-pressure oil pipe to the high-pressure oil cylinder 1203 through the booster unit 1202. The steel support axial force can be adjusted by the proportional valve 1204. The oil inlet and the oil outlet of the oil cylinder 1203 are respectively set by two hydraulic locks 1205, so that the volume of the hydraulic oil in the oil cylinder 1203 controlled by the hydraulic lock 1205 remains unchanged, thereby keeping the steel support axial force generated by the oil cylinder 1203 unchanged.

[0078] In addition, the steel support axial force control system of the embodiment of the present invention includes but is not limited to the above modules. The steel support axial force control system of the embodiment of the present invention can adaptively set relevant functional modules according to the steel support axial force control method in any embodiment of the present invention to achieve the function and technical effect of the steel support axial force control method in any embodiment of the present invention.

[0079] An embodiment of the present invention provides a steel support axial force regulation system, which controls the steel support axial force applied to the foundation pit retaining structure by a steel support servo device according to an optimized axial force control model to form a closed-loop control system, continuously and automatically adjust the axial force control model, control the deformation of the foundation pit retaining structure in real time, and gradually eliminate the mutual interference between the steel support axial forces applied to different foundation pit retaining structures, until the actual deformation value of the foundation pit retaining structure meets the preset deformation condition, and controls the deformation of the retaining structure in real time, which can solve the problem of mutual interference between the steel support axial forces of different foundation pit retaining structures and achieve precise control of the steel support axial force.

[0080] 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 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 method for regulating the axial force of a steel support, characterized in that: The steel support axial force control method comprises: Obtain the current deformation data of the foundation pit retaining structure; Obtaining steel support axial force data applied to the foundation pit retaining structure according to current deformation data of the foundation pit retaining structure and an axial force control model; After the steel support servo device applies the steel support axial force corresponding to the steel support axial force data to the foundation pit retaining structure, updating the current deformation data of the foundation pit retaining structure; The axial force control model is optimized according to the current deformation data of the foundation pit retaining structure until the current deformation data generated by the steel support axial force applied to the foundation pit retaining structure by the steel support servo device controlled by the optimized axial force control model meets the preset deformation conditions.

2. The steel support axial force control method according to claim 1 is characterized in that: The preset deformation condition includes that the actual deformation value of the foundation pit retaining structure is less than the preset target deformation value, and the deformation rate of the foundation pit retaining structure is less than the preset deformation rate, and the deformation trend of the foundation pit retaining structure is less than the preset deformation trend; wherein, the current deformation data includes the actual deformation value of the foundation pit retaining structure.

3. The steel support axial force control method according to claim 2 is characterized in that: When the current deformation data of the foundation pit retaining structure does not meet the preset deformation condition, the method further includes: When the actual deformation value of the foundation pit retaining structure is greater than or equal to the preset target deformation value, a first warning message is issued; When the deformation rate of the foundation pit retaining structure is greater than or equal to the preset deformation rate, a second warning message is issued; When the deformation trend of the foundation pit retaining structure is greater than or equal to the preset deformation trend, a third warning message is issued.

4. The steel support axial force control method according to claim 2, characterized in that: The axial force control model includes a PID control model, and the optimization of the axial force control model according to the current deformation data of the foundation pit retaining structure includes: Comparing the actual deformation value with the preset target deformation value to obtain a deformation error value; The PID control model is adjusted according to the deformation error value and based on a neural network model.

5. The steel support axial force control method according to claim 1, characterized in that: Before obtaining the current deformation data of the foundation pit retaining structure, the method further includes: Obtain the initial axial force control model and historical operation data; The initial axial force control model is optimized according to the historical operation data to obtain the axial force control model.

6. The steel support axial force control method according to claim 5, characterized in that: The step of optimizing the initial axial force control model according to the historical operation data to obtain the axial force control model includes: The initial axial force control model is optimized based on a neural network model according to the historical operation data to obtain the axial force control model.

7. A steel support axial force control system, characterized in that: The system includes a plurality of steel support servo devices and a data processing center; each of the steel support servo devices is in communication connection with the data processing center; the data processing center is used to execute the steel support axial force control method according to any one of claims 1 to 6, and the data processing center includes: An acquisition unit, used for acquiring current deformation data of the foundation pit retaining structure; A steel support controller, used for obtaining the steel support axial force data applied to the foundation pit retaining structure according to the current deformation data of the foundation pit retaining structure and the axial force control model; The acquisition unit is also used to update the current deformation data of the foundation pit retaining structure after the steel support servo device applies the steel support axial force corresponding to the steel support axial force data to the foundation pit retaining structure; The steel support controller is also used to optimize the axial force control model according to the current deformation data of the foundation pit retaining structure until the current deformation data generated by the steel support axial force applied to the foundation pit retaining structure by the steel support servo device controls the optimized axial force control model to meet the preset deformation conditions.

8. The steel support axial force control system according to claim 7, characterized in that: The data processing center includes a plurality of the steel support controllers, and each of the steel support controllers corresponds to one of the steel support servo devices.

9. The steel support axial force control system according to claim 7, characterized in that: The steel support servo equipment includes a cylinder displacement monitoring unit and a servo cylinder driving unit; The oil cylinder displacement monitoring unit is used to feedback the position of the oil cylinder in the servo oil cylinder driving unit; The servo cylinder driving unit is used to apply the steel support axial force to the foundation pit retaining structure according to the steel support axial force data.

10. The steel support axial force control system according to claim 9, characterized in that: The servo cylinder drive unit includes a servo motor, a booster unit, a cylinder, a proportional valve and two hydraulic locks; The output end of the servo motor, the booster unit and the oil inlet of the oil cylinder are connected in sequence through an oil pipe, the servo motor is used to draw hydraulic oil to the booster unit, and the booster unit is used to boost the hydraulic oil and then deliver it to the oil cylinder; The proportional valve is arranged on the oil pipe of the oil outlet of the oil cylinder, and the proportional valve is used to control the discharge of the hydraulic oil in the oil cylinder; The two hydraulic locks are respectively provided with an oil inlet and an oil outlet of the oil cylinder, and the hydraulic locks are used to control the volume of the hydraulic oil in the oil cylinder to remain unchanged.

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