Standard penetration test device, method and system based on energy measurement

Abstract

The invention provides a standard penetration test device, method and system based on energy measurement. The standard penetration test device is provided with a drill rod, a hammering unit and a penetration device. An energy measuring module is arranged between the drill rod and the penetrometer, and a force sensor and an acceleration sensor are arranged in the energy measuring module; threads are arranged at the two ends of the energy measuring module, one end of the energy measuring module is fixedly connected with the bottom end of the drill rod through the threads, the other end of the energy measuring module is rotatably and fixedly connected with the penetrometer through the threads, and the hammering unit is arranged at the top end of the drill rod. By means of the standard penetration test device, the energy measuring point is moved to the energy transmission tail end, energy actually received by the penetrometer is directly captured, energy loss and rod length influence are separated in a force and acceleration parameter fusion mode, and the precision and efficiency of a standard penetration test are improved.

Description

Technical Field

[0001] This application relates to the field of geotechnical engineering investigation technology, and in particular to a standard penetration test apparatus, method and system based on energy measurement. Background Technology

[0002] The standard penetration test (SPT) is a field testing method that uses a freely falling hammer to strike a penetrator to a certain depth in the soil and records the number of blows to assess the mechanical properties of the soil. This test is widely used in engineering scenarios such as foundation bearing capacity assessment, soil liquefaction detection, and soil classification, and is one of the core tools in geotechnical engineering investigation.

[0003] In practical applications, standard penetration tests need to be conducted in complex field environments. The test depth may extend from shallow layers (such as a few meters) to deep layers (such as tens of meters). For different depths, equipment needs to be disassembled and the drill rod length adjusted in order to complete the test.

[0004] However, existing technologies require frequent disassembly and assembly of equipment and cannot directly measure the actual energy transmitted to the bottom of the drill pipe, which reduces the efficiency and accuracy of penetration tests. Summary of the Invention

[0005] This application provides a standard penetration test apparatus, method, and system based on energy measurement, which can optimize the energy measurement location, directly measure the actual energy transmitted at the bottom of the drill pipe, and then calculate the rod length correction factor for ultra-deep drill pipes, thereby improving the accuracy and efficiency of standard penetration tests.

[0006] In a first aspect, embodiments of this application provide a standard penetration test apparatus based on energy measurement, comprising:

[0007] Drill pipe, hammer unit, and penetrometer;

[0008] An energy measurement module is provided between the drill pipe and the penetrometer, and a force sensor and an acceleration sensor are deployed in the energy measurement module.

[0009] The hammering unit is located at the top of the drill rod.

[0010] Furthermore, the energy measurement module also includes a cylindrical metal casing and a fixed base;

[0011] The fixed base is fixed to the cylindrical metal shell;

[0012] The force sensor is mounted on the cylindrical metal housing;

[0013] The acceleration sensor is mounted on the fixed base.

[0014] Furthermore, the force sensor is a ring strain sensor, which is used to measure the instantaneous impact force generated by the hammering unit;

[0015] The acceleration sensor is a piezoelectric accelerometer, which is used to measure the instantaneous acceleration generated by the hammering unit.

[0016] Furthermore, the energy measurement module also includes a wireless transmission unit;

[0017] The wireless transmission unit is mounted on the fixed base and is used to transmit the data information detected by the energy measurement module.

[0018] Furthermore, the standard penetration test apparatus also includes a data acquisition unit;

[0019] The data acquisition unit is used to receive the data information sent by the wireless transmission unit.

[0020] Furthermore, the hammering unit includes a hammer body, a guide rod, and a hammer pad;

[0021] The hammer body is connected to the hammer pad via the guide rod, and the hammer pad is connected to the top end of the drill rod.

[0022] Furthermore, a traction unit is provided at the top of the hammering unit, which is used to traction and control the hammering unit to perform hammering action on the drill rod.

[0023] Furthermore, a drill rod connecting unit is provided at the bottom end of the drill rod, and an internal thread is provided on the inner side of the drill rod connecting unit;

[0024] The drill pipe connection unit is fixedly connected to one end of the energy measurement module via the internal thread.

[0025] Secondly, this application proposes a standard penetration test method based on energy measurement, including:

[0026] Based on the energy measurement module, the acceleration and force signals of the hammering unit are collected. The hammering unit is used to perform the hammering action of the standard penetration test.

[0027] The acceleration signal and the force signal are analyzed and processed to obtain the hammer impact energy information;

[0028] Based on the hammer impact energy information, the rod length correction formula coefficient is calculated to obtain the hammer impact correction information;

[0029] Based on the hammer impact energy information and the hammer impact correction information, the standard penetration test results are obtained.

[0030] Thirdly, this application proposes a standard penetration test system based on energy measurement, including a standard penetration test apparatus and a computer program electronic device as described in any of the first aspects;

[0031] The electronic device includes a memory and a processor, wherein the memory stores computer-executed instructions;

[0032] The processor executes computer execution instructions stored in the memory, causing the processor to perform the method as described in the second aspect.

[0033] This application proposes a standard penetration test (SPT) apparatus, method, and system based on energy measurement. The apparatus includes a drill pipe, a hammering unit, and a penetrometer. An energy measurement module is positioned between the drill pipe and the penetrometer, housing a force sensor and an acceleration sensor. The energy measurement module has threads at both ends; one end is threadedly fixed to the bottom of the drill pipe, and the other end is threadedly rotatably fixed to the penetrometer. The hammering unit is located at the top of the drill pipe. By moving the energy measurement point to the end of the energy transmission path, the energy actually received by the penetrometer is directly captured. Furthermore, by fusing force and acceleration parameters, the influence of energy loss and drill pipe length is separated, thus improving the accuracy and efficiency of the SPT. Attached Figure Description

[0034] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0035] Figure 1 A schematic diagram of the standard penetration test apparatus based on energy measurement provided in this application;

[0036] Figure 2 This application provides a schematic flowchart of an embodiment of a standard penetration test method based on energy measurement;

[0037] Figure 3 A schematic diagram of the structure of the electronic device provided in this application.

[0038] Figure label:

[0039] 100-Standard penetration test apparatus based on energy measurement; 101-Drill pipe; 102-Penetrating device; 103-Drill pipe adapter unit; 104-Hammer body; 105-Guide rod; 106-Hammer pad; 107-Traction unit; 108-Energy measurement module; 109-Threaded adapter; 110-Fixed base; 111-Force sensor; 112-Acceleration sensor; 113-Wireless transmission unit; 114-Data acquisition unit.

[0040] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0041] 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 denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0042] Existing standard penetration testing equipment generally suffers from problems such as bulky structure, strong reliance on cables, and poor versatility, which limit its rapid deployment and efficient operation in complex geological conditions in the field. At the same time, traditional testing methods mainly rely on subjective blow count recording and lack a means of real measurement of hammer impact energy, resulting in significant deviations in penetration results between different equipment and different operators, making it difficult to meet the requirements for accuracy and consistency in penetration testing.

[0043] To address the aforementioned technical issues, this technical solution integrates a ring strain sensor and a piezoelectric accelerometer into a small cylindrical metal module at the bottom of the drill pipe. This enables the acquisition of dual parameters—instantaneous force and acceleration—during the penetration test. By using data fusion and integration algorithms, the actual energy transferred in each impact is accurately reconstructed, improving the objectivity, accuracy, and comparability of the standard penetration test results. This provides a more efficient and reliable technical approach for geotechnical engineering investigation.

[0044] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0045] Furthermore, this invention is applied to the standard penetration test in the field of geotechnical engineering investigation, and is particularly suitable for geological investigation situations requiring on-site evaluation of soil compaction and engineering foundation bearing capacity. The system as a whole can be embedded into existing penetration test procedures, possessing high practicality and versatility. The embodiments of this application will now be described with reference to the accompanying drawings.

[0046] Figure 1 A schematic diagram of the standard penetration test apparatus based on energy measurement provided in this application. Figure 1 As shown, the standard penetration test apparatus 100 based on energy measurement includes:

[0047] The system includes a drill pipe 101, a hammering unit, and a penetrometer 102. The drill pipe 101 is a standard 40mm diameter drill pipe. In this embodiment, it consists of multiple units, each 2-3.5m long, connected by an adapter unit. The specific length can be adjusted according to the actual application scenario. The multiple-unit design facilitates on-site assembly and disassembly, allowing for rapid adaptation to different burial depths and reducing manufacturing and maintenance costs.

[0048] The top end of drill pipe 101 is connected to the hammering unit, which includes a hammer body 104, a guide rod 105, and a hammer pad 106. In this embodiment, the hammer body 104 is a 63.5kg through-hole hammer with good inertial stability. The guide rod 105 is 76cm long, which ensures the stability of the hammering path.

[0049] The guide rod 105 is connected to the top of the drill rod 101 via the hammer pad 106, which can buffer the hammering force and transmit it to the drill rod 101. In this embodiment, the guide rod 105 of fixed length is combined with the hammer body 104 to ensure that the kinetic energy of each hammering is consistent, which helps to improve the accuracy of subsequent energy measurement.

[0050] In another aspect, this application embodiment also includes a traction unit 107, which pulls the hammer body 104 up to the top to trigger the automatic unhooking device to drop the hammer and strike the hammer pad 106, thereby transmitting the force to the drill rod 101.

[0051] The automatic unhooking device is a key mechanical structure in this invention used to achieve automatic release and fall of the hammer in the standard penetration test. Its function is to automatically trigger the release device after the hammer is lifted to a set height (e.g., 76cm) by the traction unit 107, so that the hammer can fall freely and hit the hammer pad without manual intervention, thereby ensuring the consistency of the height of each hammer strike and the stability of the vertical force.

[0052] Specifically, an automatic unhooking device typically includes the following components: a traction unit interface, a limit trigger mechanism, a latching mechanism, and a reset unit. The traction unit interface connects to the traction unit to pull the hammer to a set height. The limit trigger mechanism is used to trigger the hammer to release the hook immediately after it is pulled to the top of the guide rod and the trigger is engaged. The latching mechanism can temporarily fix the hook structure of the hammer and release it quickly once triggered. The reset unit automatically resets after unhooking to prepare for the next hammer strike, such as with a spring.

[0053] Using an automatic unhooking device can ensure consistent hammering height and avoid errors caused by human control. For example, it ensures that the hammer drop height is 76cm each time. At the same time, it can eliminate the need for manual unhooking, shorten the test cycle, and avoid the risk of operator misoperation or injury during the unhooking process. This ensures that the force and acceleration data measured later are accurate and can be used to scientifically calculate hammering energy and correction coefficients. It is a fundamental link to ensure the test accuracy and intelligence level of the entire system.

[0054] The lower end of the drill rod 101 is connected to the penetrometer 102. Specifically, the penetrometer 102 is a device for penetrating the soil. Its length is set to 70cm and it is installed at the bottom of the drill rod 101 to actually penetrate the soil layer and reflect the mechanical properties of the soil layer.

[0055] An energy measurement module 108 is provided between the drill pipe 101 and the penetrometer 102. The energy measurement module 108 is the core component of this application. Its structure is a compact cylindrical metal shell, located between the drill pipe 101 and the penetrometer 102, and the end is provided with a standard thread, which can quickly connect the drill pipe 101 and the penetrometer 102.

[0056] The energy measurement module 108 also includes a fixed base 110 to provide structural stability for supporting the various internal components.

[0057] Specifically, the energy measurement module 108 has threaded adapters 109 at both ends. One end of the energy measurement module 108 is fixedly connected to the bottom end of the drill rod 101. Specifically, the bottom end of the drill rod 101 also has a drill rod connecting unit 103, which has internal threads. The drill rod connecting unit 103 is fixedly connected to the threaded adapter 109 at one end of the energy measurement module 108 via the internal threads. The other end of the energy measurement module 108 is fixedly connected to the penetrometer 102 via the threaded adapter 109. It should be noted that the energy measurement module described in this application is a universal module and can be installed in other standard penetration testing (SPT) devices in China.

[0058] On the other hand, the energy measurement module 108 also includes a force sensor 111 and an acceleration sensor 112. The force sensor 111 is located between the cylindrical metal housing and the fixed base 110, while the acceleration sensor 112 is located on the fixed base 110. Specifically, the force sensor 111 is a ring strain sensor used to measure the instantaneous impact force generated by the hammering unit; the acceleration sensor 112 is a piezoelectric accelerometer used to measure the instantaneous acceleration generated by the hammering unit.

[0059] On the other hand, the energy measurement module 108 also includes a wireless transmission unit 113, which is disposed on the fixed base 110 and is used to transmit the data information detected by the energy measurement module 108.

[0060] The standard penetration test apparatus proposed in this application also includes a data acquisition unit 114, which is used to receive data information sent by the wireless transmission unit 113. The data acquisition unit 114 is equipped with an analysis algorithm that can calculate the effective energy of each hammer blow based on the synchronous signals of the two parameters of force and acceleration, and display the current number of blows and the result of the corrected number of blows in real time, and store the complete record of each test, and finally form an electronic data report.

[0061] For example, in accordance with the requirements of on-site geological exploration, the energy measurement module 108 of the present invention is installed between the drill rod 101 and the penetrometer 102 of the standard penetration test equipment. The energy measurement module 108 is a compact cylindrical metal housing unit with standard threads at its upper and lower ends, which are mechanically connected to the bottom end of the drill rod 101 and the top end of the penetrometer 102, respectively, ensuring a stable and reliable connection. It is easy to install or remove at different depths without the need for additional customized connecting parts.

[0062] Subsequently, a hammering unit is installed at the upper end of the test equipment. This unit includes a 63.5kg through-type hammer, a 76cm long guide rod 105, and a hammer pad 106. The hammer is raised to the top of the guide rod via a traction unit 107 and is precisely released under the control of an automatic release device, ensuring that each hammer blow falls freely from a fixed height and strikes the hammer pad. The impact force is then transmitted along the drill rod 101 to the penetrometer 102 and the bottom soil layer.

[0063] At the moment of each impact, the ring strain sensor (for collecting impact force) and the piezoelectric accelerometer (for collecting acceleration) installed inside the energy measurement module 108 are activated simultaneously to collect and transmit the mechanical response signal generated by the shock wave in real time. To ensure data real-time performance and anti-interference capability, the module also integrates a wireless transmission unit 113, which can efficiently transmit the measured dual-channel data wirelessly to the data acquisition unit 114 on the ground.

[0064] The data acquisition unit 114, as the core of the system's control and analysis, synchronously analyzes and processes the received force and acceleration signals, extracts key signal features such as signal amplitude, integral energy, and peak time, and calculates the actual energy value acting on the penetrator 102. Subsequently, the system automatically compensates for energy loss according to the rod length correction formula corresponding to the penetration depth, and outputs the corrected penetration energy and the corresponding blow count correction value.

[0065] Ultimately, by combining the corrected data from each hammer blow, the system can generate complete standard penetration test results, including parameters such as the number of blows (N), effective energy (E), and penetration resistance, achieving a more accurate, efficient, and standardized assessment of foundation soil layers. The entire experimental process achieves high integration, convenient assembly, real-time data acquisition, automatic analysis, and wireless communication, effectively solving problems such as complex field operation, data distortion, and poor versatility inherent in traditional devices, significantly improving the efficiency and accuracy of engineering surveys.

[0066] The standard penetration test device based on energy measurement proposed in this application effectively solves the problems of poor portability, insufficient versatility, poor depth applicability, and low energy measurement accuracy of existing equipment by integrating a lightweight energy measurement module. By incorporating a built-in ring strain sensor and a piezoelectric accelerometer, it achieves dual parameter acquisition of impact force and acceleration during the hammering process, significantly improving the accuracy of energy calculation and the comprehensiveness of correction coefficients. At the same time, it is equipped with a wireless transmission module, eliminating the need for traditional cable connections, improving the flexibility and safety of field operations, and enhancing the reliability and measurement efficiency of penetration test data.

[0067] Figure 2 This application provides a flowchart illustrating an embodiment of a standard penetration test method based on energy measurement. This embodiment offers a data processing method based on an energy measurement module, suitable for precise data recording, processing, and result correction for each hammer blow in a standard penetration test, thereby outputting a more objective and accurate blow count correction result. This method operates on a ground-based data acquisition unit and communicates with force and acceleration sensors at the bottom of the device. Figure 2 As shown, it includes:

[0068] S201. Based on the energy measurement module, the acceleration and force signals of the hammering unit are collected.

[0069] In this step, the main components are the piezoelectric accelerometer and the ring strain sensor in the energy measurement module.

[0070] Specifically, whenever the hammer is released by the automatic unhooking device and falls onto the hammer pad, transmitting the impact force along the drill rod to the energy measurement module at the bottom, the acceleration sensor records the instantaneous acceleration time change curve, and the force sensor also senses the time change curve corresponding to the force at the moment of hammer impact.

[0071] In this embodiment, the energy strategy module is installed at the bottom of the drill pipe, which can directly sense the actual energy acting on the penetrometer. This avoids the estimation deviation caused by drill pipe transmission loss in traditional methods, and can capture a more complete impact response process, which is beneficial for subsequent energy analysis and correction parameter calculation.

[0072] S202. Perform signal analysis and processing on the acceleration and force signals to obtain the hammer impact energy information.

[0073] In this step, the data acquisition unit is the main operator. Specifically, the data acquisition unit first performs synchronous time window processing on the acceleration and force signals to ensure calculation accuracy, and then performs noise reduction, smoothing, and normalization on the signals.

[0074] Then, based on the acceleration signal, the velocity curve v(t) is obtained through integration, as shown in the following formula:

[0075]

[0076] Where a(t) represents the acceleration signal, and then the actual energy transferred by the hammer is calculated by combining it with the force signal, as shown in the following formula:

[0077]

[0078] Where F(t) represents the force signal and E represents the actual energy transferred.

[0079] Then, the average actual energy transferred at this depth is calculated based on the actual energy transferred for each strike, using the following formula:

[0080]

[0081] in, The actual energy transferred in each strike is given by n, which is the total number of strikes at the depth of this experiment.

[0082] S203. Based on the hammer impact energy information, calculate the rod length correction formula coefficient to obtain the hammer impact correction information.

[0083] This step takes into account the impact of shock wave attenuation and inertia caused by different drill pipe lengths.

[0084] For example, after obtaining the average energy value of the hammer blows, the rod length correction factor is calculated based on the formula for each standard penetration test depth segment, as follows:

[0085]

[0086] Where N is the original number of hits, This is the corrected hit count. The calculation formula is 63.5kg * 0.76m * 9.8m / m² = 473J, that is... The value is fixed at 473J. This calculation fully considers the attenuation characteristics of energy during the transmission process in the drill pipe, making the correction of the number of blows more physically based.

[0087] The above steps can output correction coefficients for different drill pipe lengths and hammer energy fluctuations, which can accurately reflect the actual penetration energy efficiency and reduce human experience judgment.

[0088] S204. Based on the hammering energy information and hammering correction information, the standard penetration test results are obtained.

[0089] After each trial is completed, output the energy value of each hit. Average energy at each test depth Original hit count N and final corrected hit count Finally, all data is automatically used to generate a standard penetration test report, which includes blow count correction curves for each depth, energy transfer statistics tables, and graphs of the entire test process.

[0090] This embodiment, by setting up a bottom energy measurement module and adopting a force-acceleration dual-signal fusion algorithm, can not only accurately reflect the effective energy transfer process during hammering, but also automatically calculate correction coefficients based on the factors of drill pipe length and inertia, thereby outputting more accurate and reliable penetration test results. It solves the technical bottlenecks of inaccurate energy measurement, reliance on experience for correction, and poor applicability in traditional penetration tests, and has broad engineering promotion value.

[0091] Figure 3 A schematic diagram of the structure of the electronic device provided in this application. Figure 3 As shown, the electronic device 30 provided in this embodiment includes:

[0092] At least one processor 301 and memory 302. Optionally, the device 30 also includes a communication component 303.

[0093] The processor 301, memory 302 and communication component 303 are connected via bus 304.

[0094] In a specific implementation, at least one processor 301 executes computer execution instructions stored in memory 302, causing at least one processor 301 to perform the above-described method.

[0095] The specific implementation process of processor 301 can be found in the above method embodiments, and its implementation principle and technical effect are similar. It will not be repeated here.

[0096] In the above embodiments, it should be understood that the processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), etc. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in this invention can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules within the processor.

[0097] The memory may include random access memory (RAM) and may also include non-volatile memory (NVM), such as at least one disk storage device.

[0098] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of illustration, the buses shown in the accompanying drawings are not limited to a single bus or a single type of bus.

[0099] This application also provides a standard penetration test system based on energy measurement, which integrates a hammering unit, drill pipe, penetrator, energy measurement module and electronic equipment. By arranging the energy measurement module with built-in force sensor and acceleration sensor at the bottom of the drill pipe, the impact force and acceleration signal of each hammering is collected in real time and transmitted wirelessly to the ground data terminal. With the help of energy calculation and correction algorithms, the system completes the automated processing and output of standard penetration test data.

[0100] The standard penetration test system based on energy measurement proposed in this application is lightweight, modular, and capable of deep hole operation, which significantly improves the accuracy, efficiency, and applicability of penetration testing. It solves the problems of the inability to directly measure penetration energy, bulky and inconvenient test equipment, and single correction coefficient in the prior art, thereby improving the versatility of penetration test equipment and reducing test costs.

[0101] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the above-described method.

[0102] This application also provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the above-described method.

[0103] The aforementioned readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The readable storage medium can be any available medium accessible to a general-purpose or special-purpose computer.

[0104] An exemplary readable storage medium is coupled to a processor, enabling the processor to read information from and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can reside in an Application Specific Integrated Circuit (ASIC). Alternatively, the processor and the readable storage medium can exist as discrete components in the device.

[0105] The division of units is merely a logical functional division; in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, devices, or units, and may be electrical, mechanical, or other forms.

[0106] The units described as separate components may or may not be physically separate. 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 units can be selected to achieve the purpose of this embodiment according to actual needs.

[0107] In addition, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0108] If a function is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0109] Those skilled in the art will understand that all or part of the steps of the above-described method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments; and the aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0110] Finally, it should be noted that other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A standard penetration test apparatus based on energy measurement, characterized in that, include: Drill pipe, hammer unit, and penetrometer; An energy measurement module is provided between the drill pipe and the penetrometer, and a force sensor and an acceleration sensor are deployed in the energy measurement module. The hammering unit is located at the top of the drill rod.

2. The standard penetration test apparatus according to claim 1, characterized in that, The energy measurement module also includes a cylindrical metal casing and a fixed base; The fixed base is fixed to the cylindrical metal shell; The force sensor is mounted on the cylindrical metal housing; The acceleration sensor is mounted on the fixed base.

3. The standard penetration test apparatus according to claim 1, characterized in that, The force sensor is a ring strain sensor, which is used to measure the instantaneous impact force generated by the hammering unit. The acceleration sensor is a piezoelectric accelerometer, which is used to measure the instantaneous acceleration generated by the hammering unit.

4. The standard penetration test apparatus according to claim 2, characterized in that, The energy measurement module also includes a wireless transmission unit; The wireless transmission unit is mounted on the fixed base and is used to transmit the data information detected by the energy measurement module.

5. The standard penetration test apparatus according to any one of claims 1 to 4, characterized in that, The standard penetration test apparatus also includes a data acquisition unit; The data acquisition unit is used to receive the data information sent by the wireless transmission unit.

6. The standard penetration test apparatus according to any one of claims 1 to 4, characterized in that, The hammering unit includes a hammer body, a guide rod, and a hammer pad; The hammer body is connected to the hammer pad via the guide rod, and the hammer pad is connected to the top end of the drill rod.

7. The standard penetration test apparatus according to any one of claims 1 to 4, characterized in that, The hammering unit is also equipped with a traction unit at its top, which is used to traction and control the hammering unit to perform hammering action on the drill rod.

8. The standard penetration test apparatus according to any one of claims 1 to 4, characterized in that, The bottom end of the drill rod is also provided with a drill rod connecting unit, and the inner side of the drill rod connecting unit is provided with an internal thread; The drill pipe connection unit is fixedly connected to one end of the energy measurement module via the internal thread.

9. A standard penetration test method based on energy measurement, characterized in that, include: Based on the energy measurement module, the acceleration and force signals of the hammering unit are collected. The hammering unit is used to perform the hammering action of the standard penetration test. The acceleration signal and the force signal are analyzed and processed to obtain the hammer impact energy information; Based on the hammer impact energy information, the rod length correction formula coefficient is calculated to obtain the hammer impact correction information; Based on the hammer impact energy information and the hammer impact correction information, the standard penetration test results are obtained.

10. A standard penetration test system based on energy measurement, characterized in that, Includes the standard penetration test apparatus and electronic equipment as described in any one of claims 1 to 8; The electronic device includes a memory and a processor, wherein the memory stores computer-executed instructions; The processor executes computer execution instructions stored in the memory, causing the processor to perform the method as described in claim 9.

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