Intelligent static and dynamic rock-soil compression modulus testing device

Abstract

The present application relates to the technical field of geotechnical survey, in particular to a kind of intelligent static and dynamic rock-soil compression modulus test equipment, including base, counterforce component, linear exciter, displacement component and detection component, support piece is configured to drive the overall movement of the test equipment to preset position, and with preset fastening force is completed positioning;Counterforce component includes fixed seat, fixed column, loading plate;Fixed seat and base are contacted with preset compression force and keep movable up and down;Displacement component includes measuring bridge and laser displacement meter;Detection component carries loading pressure and displacement parameter detection, signal collection, the test data measured are arranged, the dynamic compression modulus of multiple measuring points is calculated, and the stress-deformation data obtained by multiple measuring points are fitted;The present application is conveniently moved and fixed, with the advantages of low test cost, short construction period, high safety, etc., while realizing the purpose of efficient, rapid, accurate in-situ testing of dynamic-static compression modulus of foundation soil, more practical.

Description

Technical Field

[0001] This invention relates to the fields of geotechnical surveying and compression modulus testing, specifically to an intelligent dynamic and static geotechnical compression modulus testing device. Background Technology

[0002] Both nature and human activities involve varying degrees of dynamic and static loads, especially dynamic loads such as earthquakes and mechanical movements, which have a significant impact on buildings and structures. Buildings and structures are categorized into structures and buildings. Buildings are generally referred to as structures or buildings used for production, living, or other activities. Examples include industrial buildings, civil buildings, agricultural buildings, and garden buildings. Structures generally refer to places where people do not directly engage in production or living activities, such as water towers, chimneys, piers, dams, and reservoirs. When buildings and structures are subjected to dynamic loads, they also affect the foundation. Under load, the foundation will undergo further compressive settlement, causing tilting, cracking, or even collapse of the building or structure, damaging it. Therefore, when designing buildings and structures, it is necessary to measure the dynamic and static compressive moduli of the foundation for design calculations.

[0003] Currently, the main method for obtaining the dynamic and static compression modulus parameters of foundation soil is through on-site sampling and indoor testing. However, the sampling and delivery process inevitably disturbs the specimens. Plate load tests can only obtain the deformation modulus, not the dynamic compression modulus. Furthermore, load tests require surcharge, which is costly, time-consuming, and carries the risk of surcharge collapse.

[0004] The prior art disclosed in "CN 107059833 A, On-site dynamic compression modulus tester for foundation" describes that "this invention discloses an on-site dynamic compression modulus tester for foundation, including a laser displacement meter (200) standing on the foundation surface, an experimental loading mechanism standing on the foundation, and a data processing box (100). The experimental loading mechanism has a vertical slide rail (20) on its stabilizing support (4). The reaction module (5), the linear vibrator (6), and the small-area loading hammer (8) are fixed together and slidably connected to the stabilizing support (4) through the pulley group (3). The horizontal movement of the linear vibrator (6) and the reaction module (5) is restricted by the stabilizing support (4) and the slide rail, so that they generate good vertical movement. The vertical loading pressure provided by the linear vibrator (6) is applied to the soil to be tested. The force sensor (7) and the laser displacement meter collect the force-displacement relationship curve, and finally the dynamic compression modulus of the foundation is obtained by the data processing box."

[0005] The prior art of the aforementioned disclosed patent represents our company's initial product concept and still has the following drawbacks: First, the structure is relatively simple, failing to achieve the advantages of lower testing costs, shorter construction periods, and higher safety compared to indoor tests and plate load tests, while simultaneously enabling efficient, rapid, and accurate in-situ testing of the dynamic and static compression modulus of foundation soil. Second, the compression modulus tester of the aforementioned prior art is not easily portable. Further analysis reveals that the dynamic compression modulus test of foundation soil requires moving the testing equipment to the testing point. Moreover, the testing points for foundation soil are not singular; in actual testing, multiple foundation soil testing points within a designated area need to be tested. However, the existing compression modulus tester is bulky and inconvenient to move and carry. It typically employs a split-type disassembly structure for transport, which is cumbersome, time-consuming, and labor-intensive to assemble on-site. Third, the testing results of the aforementioned existing compression modulus tester are unsatisfactory. Further analysis revealed that the parameter acquisition and processing for the vibrator and laser displacement gauge were not intelligent enough. The structure was simple, requiring manual data recording, aggregation, and calculation. Furthermore, there was no detailed explanation of the parameter acquisition, processing, dynamic compression modulus results, or stress-deformation data fitting. For testing personnel at the testing site, this meant they could not achieve intelligent and efficient data acquisition, classification, processing, and storage, nor could they effectively calculate the dynamic compression modulus or display the stress-deformation data fitting. Summary of the Invention

[0006] To address the shortcomings and deficiencies of existing geotechnical compression modulus testing technologies, this invention provides an intelligent geotechnical compression modulus testing device with a reasonable structural design, convenient movement and fixation, and advantages over indoor tests and plate load tests, such as lower testing costs, shorter construction periods, and higher safety. It also achieves efficient, rapid, and accurate in-situ testing of the dynamic and static compression modulus of foundation soil, while simultaneously enabling intelligent and efficient data acquisition, classification, processing, and storage, as well as dynamic compression modulus calculation and stress-deformation data fitting visualization.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: An intelligent dynamic and static soil compression modulus testing device includes a base, a reaction force assembly, a linear vibrator, a displacement assembly, and a detection assembly. The base is vertically distributed and has a columnar frame structure. A support member is connected to the lower end of the base, configured to move the entire testing device to a preset position and complete the positioning and installation operation with a preset clamping force. The reaction force assembly includes a fixed seat, a fixed column, and a loading plate. The fixed seat is a columnar frame structure and is positioned inside the base via a guide structure, with the two in contact with each other by a preset clamping force, ensuring that the fixed seat can only move vertically relative to the base. The fixed column is vertically distributed and fixedly connected to the fixed seat via the support plate. The area above the support plate is divided into two symmetrically distributed loading zones by the fixed column, used to add a preset weight of counterweight load during the test. The loading plate is located at the lower end of the fixed column; an array of pressure sensors is also provided on the fixed column and above the loading plate; the linear vibrator is installed on the upper end of the fixed base by fastening bolts, and the linear vibrator is also connected to a frequency converter for adjusting the speed of the linear vibrator; the displacement assembly also includes a measuring bridge and a laser displacement gauge; the measuring bridge is an inverted concave structure and can only move left and right relative to the fixed base; the laser displacement gauge is located on the measuring bridge and consists of two symmetrically distributed about the fixed column; the linear vibrator, pressure sensor, and laser displacement gauge are respectively connected to the detection assembly, which carries the functions of detecting loading pressure and displacement parameters, collecting signals, processing the measured test data, calculating the dynamic compression modulus of multiple measuring points, and fitting the stress-deformation data obtained from multiple measuring points.

[0008] As a preferred technical solution: the support includes a movable wheel, a telescopic column, and a fastening pin; the movable wheel is mounted on the base via a bracket; the telescopic column is mounted on the base and located outside the movable wheel, the bottom end of the telescopic column is provided with an installation groove, the fastening pin is vertically distributed and has a connecting arm at one end, the connecting arm is matched and installed with the installation groove.

[0009] A further preferred technical solution: A first magnet is provided in the mounting groove, and a second magnet is provided at one end of the connecting arm. The second magnet is matched and installed with the first magnet to complete the connection and fixation of the fastening nail and the telescopic column.

[0010] A further preferred technical solution: the guide structure consists of multiple groups evenly distributed in a ring, each group of the guide structure further includes a guide rod, a guide wheel, and a guide groove; the guide rods are horizontally distributed, the guide wheels are rotatably mounted on the guide rods via brackets, and the guide grooves are formed on a fixed base and remain vertically distributed; the guide wheels roll along the guide grooves.

[0011] A further preferred technical solution: A telescopic arm is also provided on one side of the guide rod. The telescopic arm includes a connecting rod and a rotating sleeve. There are two symmetrically distributed connecting rods. One connecting rod is connected to the base at one end and to the rotating sleeve at the other end. The other connecting rod is connected to the guide rod at one end and to the rotating sleeve at the other end. The rotating sleeve is disposed between the two connecting rods and maintains a rotatable connection, so that the rotating sleeve rotates clockwise to cause the telescopic arm to extend as a whole, and rotates counterclockwise to cause the telescopic arm to shorten as a whole.

[0012] A further preferred technical solution: The testing component includes a testing box, an LED screen, an operation panel, and a controller; the testing box is located on one side of the base and is coated with a waterproof coating on its outer side; the LED screen is located inside the testing box and is used to display the test operation interface and obtain the loading pressure and displacement parameters; the operation panel is located below the LED screen and is used by the operator for button operation and control; the controller is located on one side of the LED screen and is electrically connected to the linear vibrator and the laser displacement meter.

[0013] A further preferred technical solution: The controller includes a signal acquisition unit, a signal preprocessing unit, a data algorithm processing unit, and a data storage unit; the signal acquisition unit is used to acquire the loading pressure test parameter signals of the linear vibrator at different rotational speeds and the displacement deviation parameter signals detected by the laser displacement gauge; the signal preprocessing unit is used to filter and amplify the signal data stream acquired by the signal acquisition unit; the data algorithm processing unit is used to classify and aggregate the loading pressure test parameters and displacement deviation parameters of multiple measuring points into data subsets, calculate the dynamic compression modulus M using the algorithm formula of the compression modulus, and fit the stress-deformation data obtained from multiple measuring points to display it on the LED screen; the data storage unit is used to store all test data in the form of XML tables, and form a data sub-database for each test point.

[0014] As a preferred technical solution: a bearing assembly is provided between the base and the fixed seat. The bearing assembly includes a bearing plate and a hydraulic cylinder. One side of the bearing plate is hinged to the base, and one end of the hydraulic cylinder is set on the base, while the other end is hinged to the bearing plate through a connecting lug. When the test equipment is in motion, the hydraulic cylinder extends, and the bearing plate completes the support of the entire fixed seat, wherein the loading plate is left with a preset distance from the ground.

[0015] A further preferred technical solution: the support components are four groups evenly distributed in a ring.

[0016] A further preferred technical solution: The base includes a base plate and a support frame disposed above the base. A storage chamber is also provided in the base plate. The storage chamber is divided into several storage areas by multiple partitions for storing counterweight loads and equipment components.

[0017] The advantages of this invention compared to existing technologies are as follows: This compression modulus testing device adopts an integrated design with a reasonable structure. It utilizes a combination of moving wheels, a telescopic column, and a fixing nail to divide the testing device into a moving state and a fixed state. In the moving state, the telescopic column retracts, the fixing nail is not connected and is stored, and the moving wheels contact the ground, allowing for convenient movement. In the fixed state, the fixing nail is connected to the telescopic column, and the telescopic column extends, allowing the fixing nail to be inserted into the foundation for secure positioning. This allows for free switching between the moving and fixed states of the testing device, saving time and effort, and facilitating movement to different testing points at the testing site, thereby improving the operational efficiency of soil and rock compression modulus testing. This compression modulus testing equipment, employing a linear vibrator and frequency converter, enables convenient and efficient testing at different test points in the foundation soil, thereby obtaining multiple sets of force and displacement parameters. This provides a strong foundation for improving the accuracy of subsequent compression modulus testing. By turning off the vibrator and applying loads of varying weights, static compression modulus testing can be performed. Thus, compared to indoor tests and plate load tests, this testing equipment offers advantages such as lower testing costs, shorter construction time, and higher safety. It also achieves the goal of efficient, rapid, and accurate in-situ testing of the dynamic and static compression modulus of foundation soil, making it more practical. This compression modulus testing equipment collects test parameter signals of loading pressure applied by a linear vibrator at different rotation speeds (detected in real time by a pressure sensor) and displacement deviation parameter signals detected by a laser displacement gauge. It then filters and amplifies the signal data stream collected by the signal acquisition unit. The test parameters of loading pressure and displacement deviation from multiple measuring points are then categorized and aggregated into data subsets. The dynamic compression modulus M is calculated using the compression modulus algorithm formula, and the stress-deformation data obtained from multiple measuring points is fitted and displayed on an LED screen. This avoids the problems of manual data recording, lack of intuitiveness, and inability to observe on-site in existing technologies. It achieves intelligent and efficient data acquisition, classification, processing, and storage, as well as dynamic compression modulus calculation and stress-deformation data fitting display, further improving the efficiency and accuracy of the equipment for testing the compression modulus of soil and foundation soil. Attached Figure Description

[0018] 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.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a diagram showing the movement state of the substrate of the present invention; Figure 3 This is a diagram showing the fixed state of the substrate of the present invention; Figure 4 This is a three-dimensional schematic diagram of the fastening pin of the present invention; Figure 5 This is a perspective view of the fixing base of the present invention; Figure 6 This is a three-dimensional schematic diagram of the guiding structure of the present invention; Figure 7 This is a schematic diagram of the structure of the load-bearing component of the present invention; Figure 8 This is a diagram of the fixed base support structure in the moving state of the present invention; Figure 9 This is a diagram showing the distribution structure of the control box of the present invention; Figure 10 This is a flowchart illustrating the working principle of the controller of the present invention.

[0020] In the diagram: 1-Base, 11-Storage chamber, 12-Storage area, 13-Base plate, 14-Support frame, 2-Reaction component, 21-Fixed seat, 22-Fixed column, 23-Loading plate, 3-Linear vibrator, 31-Frequency converter, 4-Displacement component, 41-Measurement bridge, 42-Laser displacement gauge, 5-Detection component, 51-Detection box, 52-LED screen, 53-Operation panel, 54-Controller, 55-Signal acquisition unit, 56-Signal preprocessing unit, 57-Data calculation 58-Data storage unit, 6-Support component, 61-Moving wheel, 62-Telescopic column, 63-Fixing pin, 64-Mounting slot, 65-Connecting arm, 66-First magnet, 67-Second magnet, 7-Guide structure, 71-Guide rod, 72-Guide wheel, 73-Guide groove, 74-Telescopic arm, 75-Connecting rod, 76-Rotating sleeve, 8-Support plate, 81-Loading area, 9-Pressure sensor, 10-Bearing assembly, 101-Bearing plate, 102-Hydraulic cylinder. Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] It should be noted that, in specific embodiments of the present invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any actual relationship or order between these entities or operations. Furthermore, terms such as "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the use of phrases such as "comprising a..." to define an element does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0023] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," and "equipped" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; or they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] Example: Figures 1 to 10 As shown: An intelligent dynamic and static soil compression modulus testing device is disclosed. The device includes a base 1, a reaction force component 2, a linear vibrator 3, a displacement component 4, and a detection component 5. The base 1 is vertically distributed and has a columnar frame structure. Specifically, as follows... Figure 3 As shown: The base 1 includes a base plate 13 and a support frame 14 disposed above the base; a circular hole is left in the center of the base plate, and storage chambers 11 are provided on the left and right sides. The storage chambers 11 are divided into several storage areas 12 by multiple partitions for storing counterweights, equipment components and spare batteries; the counterweights are added step by step during the test. Therefore, the conventional method is to prepare separate boxes to hold the counterweights, which is inconvenient for staff to carry and time-consuming and labor-intensive. Therefore, by storing the counterweights one by one in the base, the space design is reasonable, easy to carry, simple to operate, and saves time and effort. The equipment components may include fastening nails, electrical equipment required for testing (laser displacement gauges and pressure sensors, etc., which can be easily replaced), and spare batteries to power the test equipment. In this way, a powerful testing foundation is provided for outdoor and mobile test equipment.

[0025] like Figure 1Vegetarian: In this embodiment, a support member 6 is also connected to the lower end of the base 1. The support member 6 is configured to move the entire testing device to a preset position and complete the positioning and installation operation with a preset fastening force. Specifically, the support member 6 includes a moving wheel 61, a telescopic column 62, and a fastening nail 63. The moving wheel 61 is mounted on the base 1 via a bracket; the telescopic column 62 is mounted on the base 1 and located outside the moving wheel 61. The bottom end of the telescopic column 62 is provided with an installation groove 64. The fastening nails 63 are vertically distributed and have a connecting arm 65 at one end. The connecting arm 65 is matched and installed with the installation groove 64. See details. Figure 4 As shown: The fastening pin includes a limiting plate and a nail portion disposed below the limiting plate. The limiting plate is circular and used to limit the insertion depth of the nail portion. One end of the nail portion is a pointed tip, and the other end is connected to the limiting plate, and the two are integrally formed. A first magnet 66 is also provided in the mounting groove 64, and a second magnet 67 is provided at one end of the connecting arm 65. The second magnet 67 and the first magnet 66 are matched and installed to complete the connection and fixation of the fastening pin 63 and the telescopic column 62. The use of magnetic adsorption improves the efficiency of installation; at the same time, in order to ensure the retrieval effect of the fastening pin, a pin is provided at the overlapping part of the telescopic column and the fastening pin to achieve lateral fastening; and a guide strip is provided on one side of the connecting arm to ensure the accuracy of the position. A traction hook is provided on one side of the base for connecting the drive device to achieve automatic movement.

[0026] This combination of casters, telescopic columns, and fastening pins allows the testing equipment to be used in both mobile and stationary states. In mobile mode, the telescopic columns retract, the fastening pins are disengaged and stored, and the casters are in contact with the ground, enabling convenient movement. See details... Figure 2 As shown. In the fixed state, the fastening nail is connected to the telescopic column, and as the telescopic column extends, the fastening nail can be inserted into the foundation to complete the fastening and positioning; see details below. Figure 3 As shown. In this way, the mobile and fixed states of the testing equipment can be freely switched, saving time and effort. It is also convenient to switch and move the equipment to different testing points on the testing site, thereby improving the efficiency of soil and rock compression modulus testing.

[0027] In a further preferred embodiment, a drive shaft is disposed between the front and rear movable wheels on the left side of the base, and a driven gear is disposed on the drive shaft; a drive motor is disposed at the bottom of the base, and a driving gear is disposed on the output shaft of the drive motor, maintaining meshing transmission between the driving gear and the driven gear; a cornering mechanism can also be connected to the movable wheels (existing technology, therefore not described in detail). The drive motor is a servo-controlled motor and is connected to a control switch, so that the operator can control the start and stop of the drive motor to achieve short-distance movement of the testing equipment. The drive motor drives the driving gear to rotate synchronously, which in turn drives the driven gear and the drive shaft to rotate, thereby realizing the movement of the movable wheels.

[0028] like Figure 5 As shown: In this embodiment, the reaction force component 2 includes a fixed base 21, a fixed column 22, and a loading plate 23. The fixed base 21 is a columnar frame structure and is disposed inside the base 1 via a guide structure 7. The fixed base 21 and the base 1 are in contact with a preset clamping force, ensuring that the fixed base 21 can only move up and down relative to the base 1. Specifically, the guide structure 7 consists of multiple sets evenly distributed in a ring. Each set of the guide structure 7 includes a guide rod 71, a guide wheel 72, and a guide groove 73. The guide rods 71 ​​are horizontally distributed, and the guide wheels 72 are rotatably mounted on the guide rods 71 ​​via brackets. The guide grooves 73 are opened in the fixed base 21 and are vertically distributed. The guide wheels 72 roll along the guide grooves 73. A telescopic arm 74 is also provided on one side of the guide rod 71. The telescopic arm 74 includes a connecting rod 75 and a rotating sleeve 76.

[0029] like Figure 6 As shown: Two connecting rods 75 are symmetrically distributed. One connecting rod 75 is connected at one end to the base 1 and at the other end to the rotating sleeve 76. The other connecting rod 75 is connected at one end to the guide rod 71 and at the other end to the rotating sleeve 76. The rotating sleeve 76 is positioned between the two connecting rods 75 and maintains a rotatable connection. Specifically, the rotating sleeve has internal threads, and the connecting rods on both sides have external threads with opposite directions of rotation. This allows the rotating sleeve to drive the connecting rods to rotate, so that clockwise rotation of the rotating sleeve 76 causes the telescopic arm 74 to extend as a whole, and counterclockwise rotation causes the telescopic arm 74 to shorten as a whole. The purpose of this arrangement is to ensure that the fixed base serves as the guiding foundation for the reaction module. At the testing site, the operator supports the guide wheel 72 with one hand (for positioning, ensuring the telescopic arm and guide rod are level) and rotates the rotating sleeve with the other hand. The rotation of the rotating sleeve causes the telescopic arm to extend and retract as a whole, thus adjusting the contact and fit between the guide wheel and the guide groove. This provides sufficient and appropriate clamping force while ensuring vertical guiding movement.

[0030] like Figure 7As shown: In this embodiment, a bearing assembly 10 is also provided between the base 1 and the fixed seat 21. The bearing assembly 10 includes a bearing plate 101 and a hydraulic cylinder 102. One side of the bearing plate 101 is hinged to the base 1, and one end of the hydraulic cylinder 102 is disposed on the base 1, while the other end is hinged to the bearing plate 101 via a connecting lug. When the test equipment is in motion, the hydraulic cylinder 102 extends, and the bearing plate 101 provides overall support for the fixed seat 21, with a preset distance between the loading plate 23 and the ground. The support assembly consists of four groups evenly distributed in a ring. In order to test the foundation soil by applying pressure and vibration using a linear vibrator, the fixed seat is movable up and down relative to the base. The purpose of this bearing assembly is that, when the test equipment is in motion or transportation, by controlling the control switch button connected to the hydraulic cylinder, the hydraulic cylinder extends, thereby ensuring that the two symmetrically distributed or four ring-distributed bearing plates are horizontal, providing good support for the fixed seat, allowing the loading plate to lift off the ground, and ensuring that the fixed seat and the base are as a whole, facilitating movement and transportation, saving time and effort. Even at outdoor testing sites, staff avoided the cumbersome carrying and assembly issues associated with existing modular technologies. When the testing equipment was moved to the designated testing point, staff first positioned and installed the equipment to ensure sufficient stability. Then, by retracting the hydraulic cylinder, the support plate tilted downwards. When the support plate was in a vertically retracted position, the mounting base moved downwards and detached from the base. Finally, the positions of the guide wheels and guide grooves were adjusted.

[0031] like Figure 8 As shown: In this embodiment, the fixed columns 22 are vertically distributed and fixedly connected to the fixed base 21 via the support plate 8. The area above the support plate 8 is divided into two symmetrically distributed loading zones 81 by the fixed columns 22, used to add a preset weight of counterweight load during the test. The loading plate 23 is located at the lower end of the fixed columns 22; the loading plate contacts and presses the foundation soil. An array of pressure sensors 9 is also provided on the fixed columns 22 and above the loading plate 23; the pressure sensors are used to detect the force applied by the linear vibrator in real time. The linear vibrator 3 is installed on the upper end of the fixed base 21 by fastening bolts, specifically on the top surface of the fixed base. The linear vibrator 3 is also connected to a frequency converter 31, used to adjust the rotational speed of the linear vibrator 3. Different rotational speeds of the linear vibrator result in different dynamic loads applied to the loading plate.

[0032] Reference Figure 1 As shown: In this embodiment, the displacement assembly 4 further includes a measuring bridge 41 and a laser displacement meter 42. The measuring bridge 41 has an inverted concave structure and can only move left and right relative to the fixed base 21; this configuration provides a strong foundation for subsequent offset distance measurement by the laser displacement meter. See details... Figure 1As shown, the measuring bridge mainly consists of a horizontal bar and two vertical bars, with supporting feet at the lower ends of the vertical bars. A sliding groove is provided on the corresponding base plate, and the horizontal bar is fitted into the groove for installation. The laser displacement gauges 42 are installed on the measuring bridge 41, and are two symmetrically distributed about the fixed column 22; the linear vibrator 3 and the laser displacement gauges 42 are respectively connected to the detection assembly 5. The laser displacement gauges are used to detect displacement parameters under different dynamic loading tests in real time.

[0033] In this embodiment, the detection component 5 carries the functions of detecting loading pressure and displacement parameters, collecting signals, processing the measured test data, calculating the dynamic compression modulus of multiple measuring points, and fitting the stress-deformation data obtained from multiple measuring points. Specifically, as shown... Figure 9 As shown: The detection component 5 includes a detection box 51, an LED screen 52, an operation panel 53, and a controller 54. The detection box 51 is located on one side of the base 1 and is coated with a waterproof coating on its outer side. The detection box has a door, and a combination lock is installed on one side of the door to ensure sufficient privacy and security. The LED screen 52 is located inside the detection box 51 and is used to display the test operation interface and to display the loading pressure (stress) and displacement (deformation) parameters. The operation panel 53 is located below the LED screen 52 and is used by the operator for button operation and control. The controller 54 is located on one side of the LED screen 52 and is electrically connected to the linear vibrator 3, the laser displacement gauge 42, and the pressure sensor 9.

[0034] like Figure 10 As shown: The controller 54 includes a signal acquisition unit 55, a signal preprocessing unit 56, a data algorithm processing unit 57, and a data storage unit 58. The signal acquisition unit 55 is used to acquire the loading pressure test parameter signals (stress signals) of the linear vibrator 3 at different speeds and with different weights of load counterweights, and the displacement deviation parameter signals (deformation signals) detected by the laser displacement gauge 42. The stress signal includes the loading pressure of the linear vibrator and the loading pressure of the load counterweight, specifically detected by a pressure sensor in real time. The signal preprocessing unit 56 is used to filter and amplify the signal data stream acquired by the signal acquisition unit 55. The data algorithm processing unit 57 is used to classify and aggregate the loading pressure test parameters and displacement deviation parameters of multiple measuring points into data subsets, calculate the dynamic compression modulus M using the algorithm formula for compression modulus (existing technology), and fit the stress-deformation data obtained from multiple measuring points to display it on the LED screen 52. The data storage unit 58 is used to store all test data in the form of XML tables, forming a data sub-database for each test point.

[0035] Fitting the stress-strain curve in this embodiment: The stress-strain curve is an important concept in mechanics of materials. It describes the relationship between stress and strain when a material is subjected to external forces. In experiments, we can measure the stress and strain of a material by applying different loads and plot the corresponding stress-strain curves. However, due to experimental errors and the nonlinear characteristics of materials, the stress-strain curves obtained from actual measurements are often not perfect straight lines or curves.

[0036] In this situation, we can try using fitting methods to obtain a more accurate stress-strain curve. Common fitting methods include linear fitting, quadratic fitting, and cubic fitting. Among them, linear fitting is suitable for the elastic stage of the material, while quadratic and cubic fitting are suitable for the elastoplastic stage.

[0037] Specifically, linear fitting can be solved using the least squares method, which obtains the optimal fitted line by minimizing the error between the actual data points and the fitted line. Quadratic and cubic fittings require more complex fitting formulas (current techniques), such as quadratic or cubic functions, to fit the data points. It is important to note that when fitting stress-strain curves, we should choose appropriate fitting methods and formulas based on the actual situation to ensure more accurate results.

[0038] This testing equipment boasts advantages such as low testing cost, short construction period, and high safety. It also achieves efficient, rapid, and accurate in-situ testing of the dynamic and static compression modulus of foundation soil, making it highly practical. The equipment collects test parameters from linear vibrators at different rotational speeds and with different counterweights, as well as displacement deviation parameters detected by laser displacement gauges. The acquired data streams are filtered and amplified. The test parameters from multiple measuring points are then categorized and aggregated into data subsets. The dynamic compression modulus M is calculated using the compression modulus algorithm, and the stress-deformation data from multiple measuring points is fitted and displayed on an LED screen. This avoids the problems of manual data recording, lack of intuitiveness, and inability to observe on-site in existing technologies. It achieves intelligent and efficient data acquisition, classification, processing, and storage, as well as dynamic compression modulus calculation and stress-deformation data fitting display, further improving the efficiency and accuracy of the equipment for testing the compression modulus of rock and soil foundation soil.

[0039] The testing process for dynamic soil compression modulus: 1. When conducting on-site soil testing, the testing site must first be leveled. Once the levelness of the testing point meets the requirements, the testing equipment is moved to the testing point. The next step is to remove the fastening nails and install them on the telescopic column. Then, the staff extends the telescopic column and drives all the fastening nails into the foundation soil to complete the equipment fixing operation and provide sufficient stability.

[0040] 2. In the initial state, the hydraulic cylinder extends, ensuring that the two symmetrically distributed or four ring-shaped bearing plates are horizontal, providing good support for the fixed seat, allowing the loading plate to detach from the ground, and ensuring that the fixed seat and base are a single unit for easy movement and transportation. When the testing equipment is moved to the designated test point, the operator first completes the positioning and installation of the equipment to ensure sufficient stability. Then, by opening the hydraulic cylinder to retract, the bearing plate deflects downwards. When the bearing plate is in a vertically retracted state, the fixed seat moves downwards and detaches from the base, and the loading plate at the lower end of the fixed column contacts and presses against the foundation soil. Finally, the position of the guide wheel and the guide groove is adjusted to ensure that the guide wheel is in close contact with the guide groove of the reaction component, ensuring that the fixed seat can only move up and down relative to the base. Then, the LED screen of the control box is turned on, the data cables connecting the pressure sensor array and the laser displacement gauge are tested, and the data acquisition system is started.

[0041] 3. Observe the reading of the laser displacement gauge and wait for the measured point to complete the pre-compression consolidation under the no-load state of the testing equipment.

[0042] 4. The staff adjusts the eccentric block angle of the linear vibrator to the first-level load, and at the same time adjusts the frequency converter to make the linear vibrator speed reach a certain speed M1, and starts the first-level power loading L1. After the loading lasts for 300s, the first-level loading test ends.

[0043] 5. Add a pre-set weight of counterweight (counterweight steel plate) inside the loading zone of the reaction component, and adjust the eccentric block angle of the linear vibrator to the secondary load. Adjust the frequency converter to make the linear vibrator speed reach a certain speed M2, and start the secondary power loading L2. After loading for 300s, end the secondary loading test. Among them, M1, M2...Mn show a gradually increasing trend. L1, L2...Ln also show a gradually increasing trend.

[0044] 6. Repeat the above steps until the test equipment produces "jumping vibration" in a certain level of loading or completes the fifth level of loading (speed M5, power loading L5).

[0045] 7. Then, the staff uses auxiliary equipment or manpower to lift the fixed base and linear vibrator as a whole, simultaneously extending the hydraulic cylinder to tilt the bearing plate to a horizontal position, thus completing the support of the fixed base and linear vibrator. At this point, the loading plate is off the ground. Next, the staff controls the telescopic column to retract, pulling the fixing nails out of the foundation soil. At this point, the moving wheels are in contact with the ground and can be moved. The staff then moves the testing equipment to another testing point with the same soil conditions. In this embodiment, the conventional three-point testing method is used; therefore, the testing equipment is moved to two other testing points, and the testing steps are repeated. The control unit processes the measured test data. Specifically, the signal acquisition unit acquires the load pressure test parameter signals (stress signals) applied by the linear vibrator at different rotational speeds and the displacement deviation parameter signals (deformation signals) detected by the laser displacement gauge. The data algorithm processing unit categorizes and aggregates the load pressure test parameters and displacement deviation parameters from multiple measuring points into data subsets. The dynamic compression modulus M is calculated using the existing compression modulus algorithm formula, and the stress-deformation data from multiple measuring points is fitted. The data storage unit stores all test data in XML table format, forming a data sub-database for each test point. Each sub-database contains multiple sets of stress and deformation parameters. Operators calculate the dynamic compression modulus of three measuring points using the existing compression modulus algorithm formula and fit the stress-deformation data from these three points. The fitted stress-deformation curve is displayed intuitively on an LED screen for easy viewing.

[0046] In this embodiment, the static compressive modulus can be tested by turning off the linear vibrator. The test steps are the same as those for the dynamic compressive modulus.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An intelligent testing device for dynamic and static soil compression modulus, characterized in that: The testing equipment includes a base, a reaction force assembly, a linear vibrator, a displacement assembly, and a detection assembly. The base is vertically distributed and has a columnar frame structure. A support member is connected to the lower end of the base. The support member is configured to move the entire testing equipment to a preset position and complete the positioning and installation operation with a preset clamping force. The support member includes a moving wheel, a telescopic column, and a fastening nail. The moving wheel is mounted on the base via a bracket. The telescopic column is mounted on the base and located outside the moving wheel. The bottom end of the telescopic column has a mounting groove. The fastening nails are vertically distributed and have a connecting arm at one end. The connecting arm is matched and installed with the mounting groove. A first magnet is also provided in the mounting groove, and a second magnet is provided at one end of the connecting arm. The second magnet is matched and installed with the first magnet to complete the connection and fixation between the fastening nail and the telescopic column. The reaction force assembly includes a fixed base, a fixed column, and a loading plate. The fixed base is a columnar frame structure and is positioned inside the base via a guide structure. The fixed base and the base are in contact with a preset clamping force, ensuring that the fixed base can only move up and down relative to the base. The fixed columns are vertically distributed and fixedly connected to the fixed base via a support plate. The area above the support plate is divided into two symmetrically distributed loading zones by the fixed columns, used to add a preset weight of counterweight during the test. The loading plate is located at the lower end of the fixed column. A loading plate is also provided on the fixed column and above the loading plate. The device includes a pressure sensor with an array structure; a linear vibrator is mounted on the upper end of a fixed base via fastening bolts, and a frequency converter is also connected to the linear vibrator for adjusting its rotational speed; a load-bearing assembly is provided between the base and the fixed base, the load-bearing assembly including a load-bearing plate and a hydraulic cylinder; one side of the load-bearing plate is hinged to the base, one end of the hydraulic cylinder is located on the base, and the other end is hinged to the load-bearing plate via a connecting lug; when the testing equipment is in motion, the hydraulic cylinder extends, and the load-bearing plate provides overall support to the fixed base, with a preset distance between the load-bearing plate and the ground; The displacement assembly also includes a measuring bridge and a laser displacement gauge; the measuring bridge is an inverted concave structure and can only move left and right relative to the fixed base; the laser displacement gauge is disposed on the measuring bridge and consists of two symmetrically distributed about the fixed column; the linear vibrator, pressure sensor and laser displacement gauge are respectively connected to the detection assembly, which carries the functions of detecting loading pressure and displacement parameters, collecting signals, processing the measured test data, calculating the dynamic compression modulus of multiple measuring points, and fitting the stress-deformation data obtained from multiple measuring points.

2. The intelligent dynamic and static soil compression modulus testing device as described in claim 1, characterized in that: The guide structure consists of multiple sets evenly distributed in a ring. Each set of the guide structure further includes a guide rod, a guide wheel, and a guide groove. The guide rods are horizontally distributed, the guide wheels are rotatably mounted on the guide rods via brackets, and the guide grooves are formed on a fixed base and kept vertically distributed. The guide wheels roll along the guide grooves.

3. The intelligent dynamic and static soil compression modulus testing device as described in claim 2, characterized in that: A telescopic arm is also provided on one side of the guide rod. The telescopic arm includes a connecting rod and a rotating sleeve. There are two symmetrically distributed connecting rods. One connecting rod is connected to the base at one end and to the rotating sleeve at the other end. The other connecting rod is connected to the guide rod at one end and to the rotating sleeve at the other end. The rotating sleeve is disposed between the two connecting rods and maintains a rotatable connection, so that the rotating sleeve rotates clockwise to cause the telescopic arm to extend as a whole, and rotates counterclockwise to cause the telescopic arm to shorten as a whole.

4. The intelligent dynamic and static soil compression modulus testing device as described in claim 3, characterized in that: The testing assembly includes a testing box, an LED screen, an operation panel, and a controller. The testing box is located on one side of the base and is coated with a waterproof coating on its outer side. The LED screen is located inside the testing box and is used to display the test operation interface and obtain the loading pressure and displacement parameters. The operation panel is located below the LED screen and is used by the operator for button operation and control. The controller is located on one side of the LED screen and is electrically connected to the linear vibrator and the laser displacement meter.

5. The intelligent dynamic and static soil compression modulus testing device as described in claim 4, characterized in that: The controller includes a signal acquisition unit, a signal preprocessing unit, a data algorithm processing unit, and a data storage unit. The signal acquisition unit is used to acquire loading pressure test parameter signals of the linear vibrator at different speeds and with different load weights, and displacement deviation parameter signals detected by the laser displacement gauge. The signal preprocessing unit is used to filter and amplify the signal data stream acquired by the signal acquisition unit. The data algorithm processing unit is used to classify and aggregate the loading pressure test parameters and displacement deviation parameters of multiple measuring points into data subsets, calculate the dynamic compression modulus M using the algorithm formula of compression modulus, and fit the stress-deformation data obtained from multiple measuring points to display it on the LED screen. The data storage unit is used to store all test data in the form of XML tables and form a data sub-database by test point.

6. The intelligent dynamic and static soil compression modulus testing device as described in claim 5, characterized in that: The load-bearing components are four groups evenly distributed in a ring.

7. The intelligent dynamic and static soil compression modulus testing device as described in claim 6, characterized in that: The base includes a base plate and a support frame disposed above the base; a storage chamber is also provided inside the base plate, which is divided into several storage areas by multiple partitions for storing counterweights and equipment components.

Images