Method for detecting vertical bearing capacity of pile based on hydraulic feedback system

Abstract

The present application relates to geotechnical engineering detection technical field, specifically to a kind of based on hydraulic feedback system's foundation pile vertical bearing capacity detection method, comprising the following steps: oil is supplied to the loading cylinder fixed to the counterforce frame of foundation pile top, vertical load is applied to foundation pile, and the internal pressure of oil cylinder is monitored in real time, and the internal pressure data of oil cylinder is output;Symmetrically collect foundation pile vertical displacement data, fuse foundation pile vertical displacement data and the internal pressure data of oil cylinder, and output pressure and displacement data;According to pressure and displacement data, analyze the stress state and deformation rate of foundation pile, and send adjustment instruction to oil circuit control valve group, dynamically adjust supply pressure to adjust loading parameter;According to pressure and displacement data, generate key curve, and calculate the vertical ultimate bearing capacity and characteristic bearing capacity of foundation pile, and output detection report containing multiple information;Through the above mode, according to the real-time stress state and deformation rate of foundation pile in loading process are adjusted, to meet the actual demand in the field of engineering detection.

Description

Technical Field

[0001] This invention relates to the field of geotechnical engineering testing technology, and in particular to a method for testing the vertical bearing capacity of foundation piles based on a hydraulic feedback system. Background Technology

[0002] As the core foundation component of various civil engineering projects such as building construction, bridge construction, and transportation engineering, the vertical bearing capacity of foundation piles directly determines the stability and safety of the superstructure and is a key indicator for engineering quality control. Therefore, accurate and efficient testing of the vertical bearing capacity of foundation piles is of great engineering significance.

[0003] Currently, existing testing methods generally lack a dynamically adaptable loading adjustment mechanism. Loading parameters are mostly fixed during the testing process, making it difficult to flexibly adjust them according to the real-time stress state and deformation rate of the pile during loading. This problem easily leads to two types of risks: first, excessive loading force or loading rate may cause irreversible damage to the pile, affecting the safety of subsequent use of the project; second, insufficient loading or a loading rate that is too slow will result in the test data failing to fully reflect the true bearing capacity of the pile, reducing testing accuracy and making it difficult to quickly provide comprehensive and accurate technical basis for project quality assessment. Summary of the Invention

[0004] The purpose of this invention is to provide a method for detecting the vertical bearing capacity of foundation piles based on a hydraulic feedback system. This method aims to solve the technical problems in the prior art, such as the lack of a dynamic adaptation loading adjustment mechanism, the fact that loading parameters are mostly fixed during the detection process, and the difficulty in flexibly adjusting them according to the real-time stress state and deformation rate of the foundation pile during the loading process.

[0005] To achieve the above objectives, the present invention employs a method for detecting the vertical bearing capacity of foundation piles based on a hydraulic feedback system, comprising the following steps: Oil is supplied to the loading cylinder fixed to the reaction frame at the top of the foundation pile to apply vertical load to the foundation pile, and the internal pressure of the cylinder is monitored in real time and the internal pressure data of the cylinder is output. Symmetrically collect vertical displacement data of the foundation piles, integrate the vertical displacement data of the foundation piles and the internal pressure data of the hydraulic cylinder, and output pressure and displacement data; Based on the pressure and displacement data, the stress state and deformation rate of the foundation pile are analyzed, and adjustment commands are sent to the oil circuit control valve group to dynamically adjust the oil supply pressure to regulate the loading parameters. Based on pressure and displacement data, key curves are generated, and the vertical ultimate bearing capacity and characteristic bearing capacity of the foundation piles are calculated, outputting a test report containing multiple pieces of information.

[0006] In the steps of supplying oil to the loading cylinder fixed to the reaction frame at the top of the foundation pile, applying a vertical load to the foundation pile, and monitoring the internal pressure of the cylinder in real time and outputting the internal pressure data of the cylinder: Clean the top surface of the foundation pile and ensure it is flat and free of debris. Install the reaction frame on the top of the foundation pile, and vertically fix the loading cylinder on the reaction frame so that the piston rod axis of the cylinder coincides with the axis of the foundation pile. Adjust the bearing plate to fit tightly against the top surface of the foundation pile. Connect the hydraulic pump station, oil circuit control valve group and loading cylinder to form a complete hydraulic circuit, check the oil circuit sealing and remove air from the circuit.

[0007] After connecting the hydraulic pump station, oil circuit control valve group and loading cylinder to form a complete hydraulic circuit, checking the oil circuit sealing and removing air from the circuit: A hydraulic sensor is installed at the oil inlet of the loading cylinder. Based on the set initial loading force and loading rate parameters, the hydraulic pump station is started, and hydraulic oil is introduced into the rodless chamber of the loading cylinder by the oil circuit control valve group according to the set parameters to apply vertical load to the foundation pile. At the same time, the hydraulic sensor is used to monitor the internal pressure of the cylinder in real time and output the internal pressure data of the cylinder.

[0008] Among them, in the steps of symmetrically collecting vertical displacement data of the foundation piles, fusing the vertical displacement data of the foundation piles and the internal pressure data of the hydraulic cylinder, and outputting pressure and displacement data: Displacement sensors are symmetrically installed on the edge of the bearing plate; wherein the measurement direction of the displacement sensors is vertical and consistent with the displacement direction of the foundation pile; Check the connection status of the displacement sensor and establish signal connections with the hydraulic sensor and displacement sensor. Collect the simulated internal pressure signal of the cylinder output by the hydraulic sensor and the simulated vertical displacement signal of the foundation pile collected by the displacement sensor.

[0009] The process includes checking the connection of the displacement sensor, establishing signal connections with the hydraulic sensor and the displacement sensor, and collecting the simulated internal pressure signal of the hydraulic cylinder output by the hydraulic sensor and the simulated vertical displacement signal of the foundation pile collected by the displacement sensor, respectively: The pressure analog signal and displacement analog signal are converted into digital signals, and the data are fused to output the integrated pressure and displacement data.

[0010] In the steps of converting the pressure analog signal and the displacement analog signal into digital signals, fusing the data, and outputting the integrated pressure and displacement data: The pressure digital signal and displacement digital signal corresponding to the same acquisition time are correlated and matched, and abnormal fluctuation data and invalid data are removed to output valid data; The matched valid data are structured and integrated to form a unified data set containing acquisition time, pressure value, and displacement value, and the integrated pressure and displacement data are output in a standardized format.

[0011] Among them, in the step of analyzing the stress state and deformation rate of the foundation pile based on pressure and displacement data, and sending adjustment commands to the oil circuit control valve group to dynamically adjust the oil supply pressure to regulate the loading parameters: Receive pressure and displacement data, calculate the current load, settlement and settlement rate of the foundation pile, and obtain the stress state and deformation rate of the foundation pile; The calculated settlement rate is compared with the set threshold, and it is determined whether the current loading force has reached the target value of graded loading.

[0012] In the step of comparing the calculated settlement rate with a set threshold and determining whether the current loading force has reached the target value for graded loading: If the loading force does not reach the target value but the settling rate meets the requirements, an instruction to increase the oil supply pressure is sent to the oil circuit control valve group. If either the settlement rate exceeds the threshold or the displacement reaches the warning value, a command to reduce the loading force is sent. Loading continues after the pile settlement stabilizes, and the loading parameters are dynamically adjusted.

[0013] Among the steps, generating key curves based on pressure and displacement data, calculating the ultimate vertical bearing capacity and characteristic bearing capacity of the foundation piles, and outputting a test report containing multiple pieces of information includes: Acquire pressure and displacement data, and generate key curves such as vertical load-displacement curve, settlement rate-time curve, and load-rebound displacement curve for the foundation pile. Calculate the vertical ultimate bearing capacity and characteristic bearing capacity of the foundation pile.

[0014] After calculating the vertical ultimate bearing capacity and characteristic bearing capacity of the foundation piles: Save test data, curves, and calculation results; integrate basic test information, equipment parameters, process data, curves and charts, and load-bearing capacity results; and output a test report.

[0015] This invention discloses a method for detecting the vertical bearing capacity of foundation piles based on a hydraulic feedback system. The method involves supplying oil to a loading cylinder fixed to a reaction frame at the top of the foundation pile to apply a vertical load to the pile, while simultaneously monitoring the internal pressure of the cylinder in real time and outputting the internal pressure data. Vertical displacement data of the foundation pile is symmetrically acquired, and the vertical displacement data and internal pressure data of the cylinder are fused to output pressure and displacement data. Based on the pressure and displacement data, the method analyzes the stress state and deformation rate of the foundation pile and sends adjustment commands to the hydraulic control valve group to dynamically adjust the oil supply pressure to regulate the loading parameters. Key curves are generated based on the pressure and displacement data, and the ultimate vertical bearing capacity and characteristic bearing capacity of the foundation pile are calculated, outputting a test report containing multiple pieces of information. Through this method, adjustments are made based on the real-time stress state and deformation rate of the foundation pile during the loading process to meet the practical needs of the engineering testing field. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a flowchart of the steps of the method for detecting the vertical bearing capacity of foundation piles based on a hydraulic feedback system according to the present invention.

[0018] Figure 2 This is a flowchart of steps S100 of the present invention.

[0019] Figure 3 This is a flowchart of steps S200 of the present invention.

[0020] Figure 4 This is a flowchart of steps S300 of the present invention.

[0021] Figure 5 This is a flowchart of steps S400 of the present invention.

[0022] Figure 6 This is a schematic diagram of the structural principle of the pile vertical bearing capacity detection system based on the hydraulic feedback system of the present invention.

[0023] Figure 7 This is a schematic diagram of the electronic device of the present invention.

[0024] 501-Hydraulic loading module, 502-Data acquisition module, 503-Feedback control module, 504-Data analysis module. Detailed Implementation

[0025] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application.

[0026] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0027] It should be understood that although the terms first, second, third, etc., may be used in this application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."

[0028] Please see Figures 1-5 This invention provides a method for detecting the vertical bearing capacity of foundation piles based on a hydraulic feedback system, comprising the following steps: S100: Supply oil to the loading cylinder fixed to the reaction frame at the top of the foundation pile, apply vertical load to the foundation pile, monitor the internal pressure of the cylinder in real time, and output the internal pressure data of the cylinder.

[0029] In this embodiment, oil is supplied to the loading cylinder fixed to the reaction frame at the top of the foundation pile to apply a vertical load to the foundation pile, and the internal pressure of the cylinder is monitored in real time, outputting the internal pressure data of the cylinder. The specific process is as follows: S101: Clean the top surface of the foundation pile and ensure it is flat and free of debris. Install the reaction frame on the top of the foundation pile, and fix the loading cylinder vertically on the reaction frame so that the piston rod axis of the cylinder coincides with the axis of the foundation pile. Adjust the bearing plate to fit tightly against the top surface of the foundation pile. S102: Connects the hydraulic pump station, oil circuit control valve group and loading cylinder to form a complete hydraulic circuit, checks the oil circuit sealing and removes air from the circuit; S103: A hydraulic sensor is installed at the oil inlet of the loading cylinder. Based on the set initial loading force and loading rate parameters, the hydraulic pump station is started. The oil circuit control valve group supplies hydraulic oil to the rodless chamber of the loading cylinder according to the set parameters to apply a vertical load to the foundation pile. At the same time, the hydraulic sensor monitors the internal pressure of the cylinder in real time and outputs the internal pressure data of the cylinder.

[0030] In the above process, the top surface of the foundation pile is first thoroughly cleaned to remove surface debris, dust, and protruding particles, ensuring that the top surface is flat, smooth, and free of any obstacles that may affect the transfer of force. Then, a reaction frame is installed at the corresponding position on the top of the foundation pile. The reaction frame must be firmly fixed to ensure that it does not shift or shake during loading. The loading cylinder is vertically hoisted to the preset installation position of the reaction frame and fixed. The position of the cylinder is adjusted so that the piston rod axis is precisely aligned with the foundation pile axis to avoid eccentric force during loading. Finally, the bearing plate is placed, and the angle and position of the bearing plate are finely adjusted to ensure that it is completely and tightly fitted with the top surface of the foundation pile, ensuring that the load can be evenly transferred to the foundation pile.

[0031] Connect the outlet of the hydraulic pump station to the input end of the hydraulic control valve group via a high-pressure oil pipe according to the preset connection method. Then connect the output end of the hydraulic control valve group to the rodless and rod-side interfaces of the loading cylinder via high-pressure oil pipes to form a complete hydraulic circuit. After the connection is completed, close all valves of the hydraulic control valve group, introduce a small amount of hydraulic oil into the hydraulic circuit, and check for leaks at each oil pipe joint, valve interface, and cylinder seal. If leaks are found, replace the seals or tighten the joints in time. After confirming that the seal is good, slowly open the vent valve and start the hydraulic pump station to supply oil briefly to completely expel the air in the circuit. After the venting is completed, close the vent valve.

[0032] A hydraulic sensor is installed on the inlet pipe of the loading cylinder, ensuring a tight and well-sealed connection between the sensor and the pipe, and that the sensor's measurement interface faces the direction of oil flow. Based on the engineering design requirements and the pile foundation testing plan, loading parameters such as initial loading force, loading rate, and graded loading increments are determined and accurately set on the control equipment. The hydraulic pump station is started, and the high-pressure hydraulic oil output from the pump station, after being regulated by the oil circuit control valve group, is continuously supplied to the rodless chamber of the loading cylinder according to the set parameters, pushing the piston rod downwards and applying a vertical load to the pile foundation through the bearing plate. During this process, the hydraulic sensor continuously senses the pressure changes inside the cylinder, converting the pressure signal into a recognizable electrical signal, and outputting the internal pressure data of the cylinder in real time via the signal transmission line, ensuring that the load data at every moment is accurately recorded.

[0033] S200: Symmetrically acquires vertical displacement data of foundation piles, integrates vertical displacement data of foundation piles and internal pressure data of hydraulic cylinders, and outputs pressure and displacement data.

[0034] In this embodiment, vertical displacement data of the foundation piles are symmetrically acquired, and then fused with the vertical displacement data of the foundation piles and the internal pressure data of the hydraulic cylinder to output pressure and displacement data. The specific process is as follows: S201: Displacement sensors are symmetrically installed on the edge of the bearing plate; wherein the measurement direction of the displacement sensor is vertical and consistent with the displacement direction of the foundation pile; S202: Check the connection status of the displacement sensor and establish signal connections with the hydraulic sensor and displacement sensor. Collect the simulated signal of the internal pressure of the cylinder output by the hydraulic sensor and the simulated signal of the vertical displacement of the foundation pile collected by the displacement sensor, respectively. S203: Correlate and match the pressure digital signal and displacement digital signal corresponding to the same acquisition time, and remove abnormal fluctuation data and invalid data to output valid data; S204: The matched valid data is structured and integrated to form a unified data set containing acquisition time, pressure value, and displacement value, and the integrated pressure and displacement data is output in a standardized format.

[0035] In the above process, based on the size of the bearing plate and the diameter of the pile, at least two symmetrically distributed installation points are selected on the edge of the bearing plate to ensure that the distance from the installation point to the center of the pile is equal. The displacement sensor is fixed on the selected installation point, and the installation angle of the sensor is adjusted so that the measurement direction of the sensor is kept vertical and completely consistent with the vertical displacement direction that the pile may generate during loading, so as to avoid distortion of displacement data due to deviation of measurement direction.

[0036] Check the secure fixing of each displacement sensor one by one to prevent the sensors from loosening due to vibration during loading; connect all displacement sensors to the data acquisition device through signal lines, and also connect the signal output terminal of the hydraulic sensor to the data acquisition device; start the data acquisition device and perform signal connection tests to confirm that the device can normally receive the simulated internal pressure signal of the hydraulic cylinder output by the hydraulic sensor and the simulated vertical displacement signal of the foundation pile collected by each displacement sensor, ensuring stable signal transmission without interruption or interference.

[0037] Set the sampling frequency of the data acquisition device to ensure that the acquisition times of pressure and displacement signals are completely synchronized. The data acquisition device simultaneously receives pressure analog signals and displacement analog signals at the set frequency and converts them into corresponding digital signals. Then, according to the acquisition timestamp, the pressure digital signals and displacement digital signals at the same time are matched one by one to form pairs of raw data. The matched raw data are initially screened to remove abnormal fluctuation data caused by signal interference, instantaneous sensor failure, etc., as well as invalid data that exceeds the reasonable measurement range, and retain the valid data that meets the detection requirements.

[0038] The filtered valid data are structured and integrated according to a fixed format of "collection time - pressure value - displacement value" to establish a unified dataset. The values ​​in the dataset are standardized to ensure that the units of pressure and displacement data conform to engineering testing specifications. Finally, the integrated pressure and displacement data are output in a standardized file format for easy access and analysis in subsequent stages.

[0039] S300: Analyzes the stress state and deformation rate of the foundation pile based on pressure and displacement data, and sends adjustment commands to the oil circuit control valve group to dynamically adjust the oil supply pressure to regulate the loading parameters.

[0040] In this embodiment, the stress state and deformation rate of the foundation pile are analyzed based on pressure and displacement data, and adjustment commands are sent to the oil circuit control valve group to dynamically adjust the oil supply pressure to regulate the loading parameters. The specific process is as follows: S301: Receives pressure and displacement data, calculates the current load, settlement and settlement rate of the foundation pile, and obtains the stress state and deformation rate of the foundation pile. S302: Compare the calculated settlement rate with the set threshold and determine whether the current loading force has reached the target value of graded loading; if the loading force has not reached the target value and the settlement rate meets the requirements, send an instruction to increase the oil supply pressure to the oil circuit control valve group; if the settlement rate exceeds the threshold or the displacement reaches the warning value, send an instruction to stop loading or reduce the loading force, and continue loading after the foundation pile settlement stabilizes, dynamically adjusting the loading parameters.

[0041] In the above process, the pressure and displacement data are received and integrated. Based on the conversion relationship between pressure value and load, the actual load currently borne by the pile is calculated. By comparing the displacement values ​​at different acquisition times, the settlement of the pile in the corresponding time period is calculated. Combined with the acquisition time interval, the settlement rate of the pile is further calculated. By combining the data such as load size, settlement amount and settlement rate, the current stress state of the pile (such as whether it is in a stable stress stage, whether it is close to the bearing limit, etc.) and deformation rate characteristics are determined.

[0042] The system retrieves key indicators such as the settlement rate threshold, graded loading target value, and displacement warning value from preset detection parameters. The calculated actual settlement rate is compared with the set threshold, and it is determined whether the current load on the pile has reached the target value for this graded loading. If the current loading force has not reached the graded loading target value, and the settlement rate is less than or equal to the set threshold, it indicates that the pile is under stable stress and loading can continue. In this case, an instruction to increase the oil supply pressure is sent to the oil circuit control valve group. If the settlement rate exceeds the set threshold, or the displacement reaches the preset warning value, it indicates that the pile is deforming too quickly and there may be a risk of damage. In this case, an instruction to stop loading or reduce the oil supply pressure is immediately sent to the oil circuit control valve group. After continuous monitoring shows that the pile settlement rate has returned to a stable standard, an instruction to continue loading is sent according to the actual situation. By repeatedly and dynamically adjusting the loading parameters, the system ensures the safety of the loading process and the accuracy of the detection data.

[0043] S400: Generates key curves based on pressure and displacement data, calculates the ultimate vertical bearing capacity and characteristic bearing capacity of the foundation piles, and outputs a test report containing multiple pieces of information.

[0044] In this embodiment, key curves are generated based on pressure and displacement data, and the vertical ultimate bearing capacity and characteristic bearing capacity of the foundation piles are calculated, outputting a test report containing multiple pieces of information. The specific process is as follows: S401: Acquire pressure and displacement data, and generate key curves such as vertical load-displacement curve, settlement rate-time curve, and load-rebound displacement curve for the foundation pile. S402: Calculate the vertical ultimate bearing capacity and characteristic bearing capacity of the foundation piles; S403: Saves test data, curves and calculation results, integrates basic test information, equipment parameters, process data, curves and charts, load-bearing capacity results, and outputs test reports.

[0045] During the above process, all pressure and displacement data during the loading and unloading phases are collected, including settlement data corresponding to different loads during loading and rebound displacement data corresponding to different unloading amounts during unloading. Using data processing tools, a vertical load-displacement curve of the foundation pile is plotted with load as the vertical axis and settlement as the horizontal axis; a settlement rate-time curve is plotted with time as the horizontal axis and settlement rate as the vertical axis; and a load-rebound displacement curve is plotted with load as the vertical axis and rebound displacement as the horizontal axis. The stress-deformation characteristics of the foundation pile are presented intuitively through these three key curves.

[0046] Based on the plotted key curves and referring to relevant engineering testing specifications and standards, the inflection point method is used to identify obvious inflection points on the load-displacement curve, and the load corresponding to the inflection point is determined as the vertical ultimate bearing capacity of the foundation pile. If the curve has no obvious inflection point, the ultimate settlement method is used to determine the vertical ultimate bearing capacity according to the load corresponding to the ultimate settlement value specified in the specifications. Then, based on the vertical ultimate bearing capacity and the safety factor required by the engineering design, the vertical characteristic bearing capacity of the foundation pile is calculated.

[0047] All raw data generated during the testing process, filtered valid data, three key curves plotted, and the calculated vertical ultimate bearing capacity and characteristic bearing capacity results are classified and saved to establish a complete testing data archive. Then, basic testing information is integrated, including project name, pile number, pile type, pile length, and pile diameter; testing equipment parameters, including loading cylinder model, sensor accuracy, and data acquisition frequency; testing process data, including loading grading, settlement data for each loading level, and unloading rebound data; curves, charts, and bearing capacity calculation results; finally, a clear and comprehensive testing report is generated, explicitly stating whether the vertical bearing capacity of the piles meets the design requirements, and outputting the report according to the standard format.

[0048] Corresponding to the aforementioned embodiments of the pile vertical bearing capacity detection method based on a hydraulic feedback system, this application also provides embodiments of a pile vertical bearing capacity detection system based on a hydraulic feedback system.

[0049] Figure 6 This is a block diagram illustrating a vertical bearing capacity detection system for foundation piles based on a hydraulic feedback system, according to an exemplary embodiment. (Refer to...) Figure 6 The system may include: a hydraulic loading module 501, a data acquisition module 502, a feedback control module 503, and a data analysis module 504; wherein: The hydraulic loading module 501 is used to supply oil to the loading cylinder fixed to the reaction frame at the top of the foundation pile, apply vertical load to the foundation pile, monitor the internal pressure of the cylinder in real time, and output the internal pressure data of the cylinder. The data acquisition module 502 is used to symmetrically acquire vertical displacement data of the foundation pile, integrate the vertical displacement data of the foundation pile and the internal pressure data of the hydraulic cylinder, and output pressure and displacement data. The feedback control module 503 is used to analyze the stress state and deformation rate of the foundation pile based on pressure and displacement data, and send adjustment commands to the oil circuit control valve group to dynamically adjust the oil supply pressure to regulate the loading parameters. The data analysis module 504 is used to generate key curves based on pressure and displacement data, calculate the vertical ultimate bearing capacity and characteristic bearing capacity of the foundation pile, and output a test report containing multiple pieces of information.

[0050] In this embodiment, the hydraulic loading module 501 supplies oil to the loading cylinder fixed to the reaction frame at the top of the pile, applies a vertical load to the pile, and monitors the internal pressure of the cylinder in real time, outputting the internal pressure data. The data acquisition module 502 symmetrically acquires the vertical displacement data of the pile, integrates the vertical displacement data and the internal pressure data of the cylinder, and outputs pressure and displacement data. The feedback control module 503 analyzes the stress state and deformation rate of the pile based on the pressure and displacement data, and sends adjustment commands to the oil circuit control valve group to dynamically adjust the oil supply pressure to regulate the loading parameters. The data analysis module 504 generates key curves based on the pressure and displacement data, calculates the ultimate vertical bearing capacity and characteristic bearing capacity of the pile, and outputs a test report containing multiple pieces of information. Through the above methods, adjustments are made according to the real-time stress state and deformation rate of the pile during the loading process to meet the actual needs of the engineering testing field.

[0051] Regarding the system in the above embodiments, the specific ways in which each module performs operations have been described in detail in the embodiments related to the method, and will not be elaborated here.

[0052] For the system embodiments, since they basically correspond to the method embodiments, the relevant parts can be referred to in the description of the method embodiments. The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this application according to actual needs. Those skilled in the art can understand and implement this without creative effort.

[0053] Accordingly, this application also provides an electronic device, comprising: one or more processors; a memory for storing one or more programs; and when the one or more programs are executed by the one or more processors, causing the one or more processors to implement the above-described method for detecting the vertical bearing capacity of foundation piles based on a hydraulic feedback system.Figure 7 The diagram shown is a hardware structure diagram of any device with data processing capabilities, including a pile vertical bearing capacity detection system based on a hydraulic feedback system provided in an embodiment of the present invention. (Except for...) Figure 7 In addition to the processor, memory, and network interface shown, any data processing device in the embodiment may also include other hardware depending on the actual function of the data processing device, which will not be described in detail here.

[0054] Accordingly, this application also provides a computer-readable storage medium storing computer instructions, which, when executed by a processor, implement the aforementioned method for detecting the vertical bearing capacity of foundation piles based on a hydraulic feedback system. The computer-readable storage medium can be an internal storage unit of any data-processing device as described in any of the foregoing embodiments, such as a hard disk or memory. The computer-readable storage medium can also be an external storage device, such as a plug-in hard disk, smart media card (SMC), SD card, flash card, etc., equipped on the device. Furthermore, the computer-readable storage medium can include both internal storage units of any data-processing device and external storage devices. The computer-readable storage medium is used to store the computer program and other programs and data required by the data-processing device, and can also be used to temporarily store data that has been output or will be output.

[0055] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein.

[0056] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope.

Claims

1. A method for detecting the vertical bearing capacity of foundation piles based on a hydraulic feedback system, characterized in that, Includes the following steps: Oil is supplied to the loading cylinder fixed to the reaction frame at the top of the foundation pile to apply vertical load to the foundation pile, and the internal pressure of the cylinder is monitored in real time and the internal pressure data of the cylinder is output. Symmetrically collect vertical displacement data of the foundation piles, integrate the vertical displacement data of the foundation piles and the internal pressure data of the hydraulic cylinder, and output pressure and displacement data; Based on the pressure and displacement data, the stress state and deformation rate of the foundation pile are analyzed, and adjustment commands are sent to the oil circuit control valve group to dynamically adjust the oil supply pressure to regulate the loading parameters. Based on pressure and displacement data, key curves are generated, and the vertical ultimate bearing capacity and characteristic bearing capacity of the foundation piles are calculated, outputting a test report containing multiple pieces of information.

2. The method for detecting the vertical bearing capacity of foundation piles based on a hydraulic feedback system as described in claim 1, characterized in that, In the steps of supplying oil to the loading cylinder fixed to the reaction frame at the top of the foundation pile, applying a vertical load to the foundation pile, and monitoring the internal pressure of the cylinder in real time and outputting the internal pressure data of the cylinder: Clean the top surface of the foundation pile and ensure it is flat and free of debris. Install the reaction frame on the top of the foundation pile, and vertically fix the loading cylinder on the reaction frame so that the piston rod axis of the cylinder coincides with the axis of the foundation pile. Adjust the bearing plate to fit tightly against the top surface of the foundation pile. Connect the hydraulic pump station, oil circuit control valve group and loading cylinder to form a complete hydraulic circuit, check the oil circuit sealing and remove air from the circuit.

3. The method for detecting the vertical bearing capacity of foundation piles based on a hydraulic feedback system as described in claim 2, characterized in that, After connecting the hydraulic pump station, oil circuit control valve group and loading cylinder to form a complete hydraulic circuit, checking the oil circuit sealing and removing air from the circuit: A hydraulic sensor is installed at the oil inlet of the loading cylinder. Based on the set initial loading force and loading rate parameters, the hydraulic pump station is started, and hydraulic oil is introduced into the rodless chamber of the loading cylinder by the oil circuit control valve group according to the set parameters to apply vertical load to the foundation pile. At the same time, the hydraulic sensor is used to monitor the internal pressure of the cylinder in real time and output the internal pressure data of the cylinder.

4. The method for detecting the vertical bearing capacity of foundation piles based on a hydraulic feedback system as described in claim 1, characterized in that, In the steps of symmetrically acquiring vertical displacement data of the foundation piles, fusing the vertical displacement data of the foundation piles with the internal pressure data of the hydraulic cylinders, and outputting pressure and displacement data: Displacement sensors are symmetrically installed on the edge of the bearing plate; wherein the measurement direction of the displacement sensors is vertical and consistent with the displacement direction of the foundation pile; Check the connection status of the displacement sensor and establish signal connections with the hydraulic sensor and displacement sensor. Collect the simulated internal pressure signal of the cylinder output by the hydraulic sensor and the simulated vertical displacement signal of the foundation pile collected by the displacement sensor.

5. The method for detecting the vertical bearing capacity of foundation piles based on a hydraulic feedback system as described in claim 4, characterized in that, After checking the displacement sensor connection and establishing signal connections with the hydraulic sensor and displacement sensor, and respectively acquiring the simulated internal pressure signal of the cylinder output by the hydraulic sensor and the simulated vertical displacement signal of the foundation pile acquired by the displacement sensor: The pressure analog signal and displacement analog signal are converted into digital signals, and the data are fused to output the integrated pressure and displacement data.

6. The method for detecting the vertical bearing capacity of foundation piles based on a hydraulic feedback system as described in claim 5, characterized in that, In the steps of converting analog pressure signals and analog displacement signals into digital signals, fusing the data, and outputting the integrated pressure and displacement data: The pressure digital signal and displacement digital signal corresponding to the same acquisition time are correlated and matched, and abnormal fluctuation data and invalid data are removed to output valid data; The matched valid data are structured and integrated to form a unified data set containing acquisition time, pressure value, and displacement value, and the integrated pressure and displacement data are output in a standardized format.

7. The method for detecting the vertical bearing capacity of foundation piles based on a hydraulic feedback system as described in claim 1, characterized in that, In the steps of analyzing the stress state and deformation rate of the foundation pile based on pressure and displacement data, and sending adjustment commands to the oil circuit control valve group to dynamically adjust the oil supply pressure to regulate the loading parameters: Receive pressure and displacement data, calculate the current load, settlement and settlement rate of the foundation pile, and obtain the stress state and deformation rate of the foundation pile; The calculated settlement rate is compared with the set threshold, and it is determined whether the current loading force has reached the target value of graded loading.

8. The method for detecting the vertical bearing capacity of foundation piles based on a hydraulic feedback system as described in claim 7, characterized in that, In the step of comparing the calculated settlement rate with the set threshold and determining whether the current loading force has reached the target value of the graded loading: If the loading force does not reach the target value but the settling rate meets the requirements, an instruction to increase the oil supply pressure is sent to the oil circuit control valve group. If either the settlement rate exceeds the threshold or the displacement reaches the warning value, a command to reduce the loading force is sent. Loading continues after the pile settlement stabilizes, and the loading parameters are dynamically adjusted.

9. The method for detecting the vertical bearing capacity of foundation piles based on a hydraulic feedback system as described in claim 1, characterized in that, In the steps of generating key curves based on pressure and displacement data, calculating the ultimate vertical bearing capacity and characteristic bearing capacity of the foundation piles, and outputting an inspection report containing multiple pieces of information: Acquire pressure and displacement data, and generate key curves such as vertical load-displacement curve, settlement rate-time curve, and load-rebound displacement curve for the foundation pile. Calculate the vertical ultimate bearing capacity and characteristic bearing capacity of the foundation pile.

10. The method for detecting the vertical bearing capacity of foundation piles based on a hydraulic feedback system as described in claim 9, characterized in that, After calculating the vertical ultimate bearing capacity and characteristic bearing capacity of the foundation piles: Save test data, curves, and calculation results; integrate basic test information, equipment parameters, process data, curves and charts, and load-bearing capacity results; and output a test report.

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