A method, system and device for automatic testing of a cone penetration test

Abstract

This application relates to an automatic testing method and system for cone dynamic penetration testing. The testing method includes obtaining a specified depth value G0; obtaining the number of hammer blows and the cumulative penetration depth value G of the probe after the i-th hammer blow. i The cumulative penetration depth value G will be calculated. i Matching with the specified depth value G0; based on the cumulative penetration depth value G i The matching results with the specified depth value G0 are output as exploration record information; the exploration record information includes the number of hammer blows for each penetration to the specified depth value G0. During the implementation of the cone dynamic penetration test, the number of hammer blows and the cumulative penetration depth G of the probe after the i-th blow are automatically recorded. i This helps ensure the accuracy of the original data, and in turn, based on accurate original data, it helps to obtain accurate survey results.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of geotechnical investigation, in particular to a conical dynamic sounding automatic testing method, system and device. BACKGROUND

[0002] The conical dynamic sounding is an in-situ testing method that uses a specified hammering energy to drive a specified size probe into the soil, and determines the soil properties according to the number of hammering for each specified depth of the probe driven into the soil, and mechanically stratifies the soil. According to the type of conical dynamic sounding, it is divided into light, heavy and super heavy dynamic sounding. This testing method can directly determine the mechanical characteristics of the stratum, divide the stratum, and provide parameters such as bearing capacity, deformation parameter, and compaction degree. It has the advantages of simple operation, wide adaptability, high efficiency, and low cost.

[0003] The existing CN217810916U file discloses a dynamic sounding test instrument. One end of the steel wire rope is connected to the cross hammer and hung on the fixed pulley, and the other end is wound on the shaft of the driving member (motor). The shaft of the driving member is used to wind the steel wire rope.

[0004] The above-mentioned dynamic sounding test instrument uses a motor to lift the cross hammer, which reduces the labor intensity.

[0005] At present, when performing conical dynamic sounding, manual observation (i.e. manually measuring and recording the penetration depth of the probe, manually counting and recording the number of hammering, etc.) is still used. The observation error directly affects the accuracy of the investigation results. SUMMARY

[0006] In order to improve the accuracy of the investigation results, the present application provides a conical dynamic sounding automatic testing method and system.

[0007] In the first aspect, the present application provides a conical dynamic sounding automatic testing method, which adopts the following technical solution:

[0008] A conical dynamic sounding automatic testing method, comprising:

[0009] Obtaining a specified depth value G0;

[0010] Obtaining the number of hammering and the cumulative penetration depth value G i of the probe after the i-th hammering;

[0011] Matching the cumulative penetration depth value G i with the specified depth value G0;

[0012] Based on the matching result of the cumulative penetration depth value G i and the specified depth value G0, outputting the exploration record information; the exploration record information includes the number of hammering for each penetration of the specified depth value G0.

[0013] By adopting the technical scheme, in the process of the conical dynamic sounding, the hammering times and the cumulative penetration depth value G i of the probe after the i-th hammering are automatically recorded

[0014] Preferably, based on the matching result of the cumulative penetration depth value G i and the specified depth value G0, the exploration record information is outputted, which includes:

[0015] G i-1 <G0<G i , G0-G i-1 <G i -G0, the hammering number when the first penetration reaches the specified depth value G0 is i-1.

[0016] G i-1 <G0<G i , G0-G i-1 >G i -G0, the hammering number when the first penetration reaches the specified depth value G0 is i.

[0017] By adopting the technical scheme, in the process of the conical dynamic sounding, the penetration depth of each hammering cannot be artificially controlled, so that there will be a deviation between the cumulative penetration depth value G i and the specified depth value G0 (for example, the specified depth value G0 is 30 cm, and the actual cumulative penetration depth value G i is 29.8 cm or 30.5 cm). At this time, the cumulative penetration depths G i-1 and G i after the i-1th and i-th hammering are matched with G0 respectively, so as to output the hammering number corresponding to the cumulative penetration depth value closest to the specified depth value G0.

[0018] Preferably, based on the matching result of the cumulative penetration depth value G i and the specified depth value G0, the exploration record information is outputted, which includes:

[0019] G i-1 <G0<G i , G0-G i-1 =G i -G0, the hammering number when the first penetration reaches the specified depth value G0 is i-1.

[0020] By adopting the technical scheme, if G i-1 and G i are both the cumulative penetration depth values closest to the specified depth value G0, the smaller value (i.e., i-1) is outputted as the hammering number.

[0021] Based on the number of hammering to evaluate the bearing capacity of soil layer, the smaller value of the number of hammering makes the bearing capacity evaluation value lower than the actual value of bearing capacity, and based on the bearing capacity evaluation value to carry out the construction of buildings and other constructions above the soil layer, it is beneficial to meet the design and construction requirements of the actual bearing capacity of the soil layer.

[0022] Preferably, based on the cumulative penetration depth value G i The matching result of the specified depth value G0 is output in the exploration record information, including:

[0023] G i-1 <G0<G i , G0-G i-1 =G i -G0, based on G1-G i Construct a test curve and derive G′ i-1 , G′ i ;

[0024] G′ i-1 >G′ i , the output is the number of hammering when the first penetration of the specified depth value G0 is i-1;

[0025] G′ i-1 <G′ i , the output is the number of hammering when the first penetration of the specified depth value G0 is i.

[0026] By adopting the above technical scheme, if G i-1 , G i are the cumulative penetration depth values closest to the specified depth value G0, then a test curve is constructed to analyze the bearing capacity and compaction degree of the soil layer at different depths.

[0027] G′ i-1 >G′ i , as the penetration depth increases, the penetration resistance decreases, and the actual value of the bearing capacity of the soil layer decreases, then the smaller value is output as the number of hammering.

[0028] G′ i-1 <G′ i , as the penetration depth increases, the penetration resistance increases, and the actual value of the bearing capacity of the soil layer increases, then the larger value is output as the number of hammering.

[0029] Preferably, based on the cumulative penetration depth value G i The matching result of the specified depth value G0 is output in the exploration record information, including:

[0030] G i-1 <G0<G i , G0-G i-1 =Gi In the case of -G0, based on G1-G i Construct the test curve and differentiate it to obtain G′ i-1 G′ i ;

[0031] G′ i-1 =G′ i In the case of i-1, the number of hammer blows when the first penetration depth G0 is output is i-1.

[0032] By adopting the above technical solution, G′ i-1 =G′ i In this case, as the penetration depth increases, the penetration resistance remains basically unchanged, the actual value of the soil bearing capacity remains basically unchanged, and a smaller value is output as the number of hammer blows.

[0033] Preferably, based on the cumulative penetration depth value G i The matching results with the specified depth value G0 are included in the output exploration record information, including:

[0034] G i-k-1 <(n-1)G0<G i-k G i-1 <nG0<G i G i-k +G0-G i-1 <G i -G i-k-1 In the case of -G0, the number of hammer blows when the nth penetration depth value G0 is output as k-1;

[0035] G i-k-1 <(n-1)G0<G i-k G i-1 <nG0<G i G i-k +G0-G i-1 >G i -G i-k-1 In the case of -G0, the number of hammer blows when the nth penetration depth value G0 is output as k+1;

[0036] n≥2.

[0037] By adopting the above technical solution, the cumulative penetration depth G after the (ik-1), (ik), (i-1), and (i-1)th hammer blows is calculated. i-k-1 G i-k G i-1 G i and G i-1 -G i-k G i -G i-k-1Matched with G0 respectively, to output the difference value of the number of hammering corresponding to the specific two cumulative penetration depth values (the two cumulative penetration depth values are the two cumulative penetration depth values closest to the specified depth value G0) as the number of hammering when the n-th time penetration reaches the specified depth value G0.

[0038] Preferably, based on the cumulative penetration depth value G i The matching result with the specified depth value G0 is output in the exploration record information, including:

[0039] G i-k-1 < (n-1) G0 < G i-k , G i-1 < nG0 < G i , G i-k + G0-G i-1 = G i -G i-k-1 -G0, output the number of hammering when the n-th time penetration reaches the specified depth value G0 is k.

[0040] n≥2.

[0041] By adopting the above technical solution, G i-1 -G i-k , G i -G i-k-1 Matched with G0 respectively, G i-k + G0-G i-1 = G i -G i-k-1 -G0, then the penetration depth value of the i-k-1 to i-1 time hammering is equal to the penetration depth value of the i-k to i time hammering, and both are close to the specified depth value G0, then output the number of hammering when the n-th time penetration reaches the specified depth value G0 is k.

[0042] Preferably, the specified depth value G0 includes:

[0043] Obtain the cone dynamic sounding type information;

[0044] Based on the cone dynamic sounding type information to output the specified depth value G0.

[0045] By adopting the above technical solution, the cone dynamic sounding type is divided into light, heavy, super heavy dynamic sounding, and the corresponding specified depth value G0 is 30cm, 10cm, 10cm.

[0046] Preferably, it further includes:

[0047] Based on the exploration record information to output the soil layer exploration information; the soil layer exploration information includes bearing capacity and compaction degree.

[0048] By adopting the technical scheme, the cone dynamic penetration is used to judge the mechanical characteristics of the stratum, divide the stratum, and provide parameters such as bearing capacity, deformation parameter, and compaction degree.

[0049] In a second aspect, the application provides a cone dynamic penetration automatic testing system, which adopts the following technical scheme:

[0050] A cone dynamic penetration automatic testing system comprises:

[0051] A storage module is configured to store a cone dynamic penetration automatic testing program and data.

[0052] A processing module is configured to execute the steps of the cone dynamic penetration automatic testing method when the cone dynamic penetration automatic testing program is running.

[0053] By adopting the technical scheme, the number of hammering and the cumulative penetration depth value G i of the probe rod after the i-th hammering are automatically recorded during the cone dynamic penetration, which is beneficial to ensuring the accuracy of the original data and obtaining accurate survey results based on the accurate original data.

[0054] In a third aspect, the application provides a cone dynamic penetration automatic testing device, which adopts the following technical scheme:

[0055] A cone dynamic penetration automatic testing device comprises:

[0056] A force sensor is configured to acquire the number of hammering.

[0057] A displacement sensor is configured to acquire the cumulative penetration depth value G i of the probe rod.

[0058] A processing device is configured to run the cone dynamic penetration automatic testing program.

[0059] In summary, the application has at least one of the following beneficial technical effects:

[0060] The number of hammering and the cumulative penetration depth value G i of the probe rod after the i-th hammering are automatically recorded during the cone dynamic penetration, which is beneficial to ensuring the accuracy of the original data and obtaining accurate survey results based on the accurate original data.

[0061] The bearing capacity of the soil layer is evaluated based on the number of hammering, and a smaller number of hammering makes the bearing capacity evaluation value lower than the actual bearing capacity value. When the construction such as the building construction on the soil layer is performed based on the bearing capacity evaluation value, the actual bearing capacity of the soil layer meets the design and construction requirements. BRIEF DESCRIPTION OF DRAWINGS

[0062] Figure 1is a structural block diagram of a conical dynamic penetration automatic testing device.

[0063] Figure 2 is a structural block diagram of a conical dynamic penetration automatic testing system.

[0064] Figure 3 is a structural block diagram of an acquisition module in an embodiment.

[0065] Figure 4 is a structural block diagram of an acquisition module in another embodiment.

[0066] Figure 5 is a flow chart of a conical dynamic penetration automatic testing method.

[0067] Figure 6 is a flow chart of acquiring a specified depth value G0. Embodiments

[0068] The following description is made in conjunction with the accompanying drawings. Figures 1-6 The present application is described in further detail.

[0069] A dynamic penetration tester, one end of a steel wire rope is connected to a driving hammer and hung on a fixed pulley, the other end is wound on the rotating shaft of a driving member (motor), the rotating shaft of the driving member is used to wind the steel wire rope. The driving hammer is lifted by the motor.

[0070] With reference to Figure 1 The present application discloses a conical dynamic penetration automatic testing device, comprising a force sensor, a displacement sensor and a processing device.

[0071] The force sensor is connected to the dynamic penetration tester, and is used to acquire load information of the dynamic penetration tester. The force sensor outputs the load information. Specifically, the load information mainly includes load (stress) data of the steel wire rope.

[0072] The displacement sensor is used to measure the penetration depth of the probe rod, and outputs the penetration depth information.

[0073] The processing device is connected to the force sensor, the displacement sensor and the dynamic penetration tester.

[0074] The processing device controls the operation of the dynamic penetration tester based on the load information and the penetration depth information.

[0075] For example, after the driving hammer is released, the processing device judges that there is no load based on the load information output by the force sensor, and judges that the penetration depth value no longer increases after the penetration depth value increases based on the penetration depth information, so that a single hammering is completed; then the processing device controls the dynamic penetration tester to lift the driving hammer to prepare for the next hammering; and in the case that the processing device judges that there is no load based on the load information output by the force sensor, the processing device accumulates the release times.

[0076] Meanwhile, the processing device executes the following steps of the automatic test method of the cone dynamic penetration. The processing device can be a computer, a handheld terminal, or the like, and can realize human-computer interaction.

[0077] With reference to Figure 2 The embodiment of the application discloses an automatic test system of the cone dynamic penetration, which comprises an acquisition module, a storage module, and a processing module.

[0078] The acquisition module is used to acquire the cone dynamic penetration type information, the number of hammering, and the cumulative penetration depth value G i of the probe rod after the i-th hammering. The storage module is used to store the automatic test program and data of the cone dynamic penetration. The processing module executes the following steps of the automatic test method of the cone dynamic penetration when the automatic test program of the cone dynamic penetration is run.

[0079] In one embodiment:

[0080] With reference to Figure 3 The acquisition module comprises a human-computer interaction device, a ranging device, and a processor.

[0081] The human-computer interaction device is used for the user to operate to input the cone dynamic penetration type information, and the human-computer interaction device can be a keyboard, a touch screen, or the like.

[0082] The ranging device is used to measure the cumulative penetration depth value of the probe rod, and the ranging device can be a ranging radar, a laser ranging sensor, or the displacement sensor described above.

[0083] The processor receives the cone dynamic penetration type information and the cumulative penetration depth value and performs operation processing.

[0084] The processing device described above can comprise the human-computer interaction device, the processor, the storage module, and the processing module.

[0085] In another embodiment:

[0086] With reference to Figure 4 The acquisition module comprises a human-computer interaction device, a detection device, a ranging device, and a processor.

[0087] The detection device is used to acquire the number of hammering, and the detection device can be the force sensor described above.

[0088] The ranging device is used to measure the cumulative penetration depth value of the probe rod, and the ranging device can be a ranging radar, a laser ranging sensor, or the displacement sensor described above.

[0089] The processor receives the number of hammering and the cumulative penetration depth value and performs operation processing.

[0090] The following describes implementation of the automatic testing method of the conical dynamic penetrometer automatic testing system.

[0091] In another embodiment

[0092] The acquisition module includes a camera, an image processing device, a distance measuring device, a hammer recording device, and a processing device.

[0093] The camera is used to collect images of the probe and the probe rod for processing by the image processing device.

[0094] The image processing device is used to output the probe and probe rod specification information.

[0095] The distance measuring device is used to measure the cumulative penetration depth value of the probe rod, and can be a distance measuring radar, a laser distance measuring sensor, etc.

[0096] The hammer recording device is used to record hammer data; for example, the hammer recording device receives hammer sound waves and establishes a waveform database.

[0097] The processing device receives the probe and probe rod specification information, the cumulative penetration depth value, and the hammer data and performs calculation processing.

[0098] With reference to Figure 5 , the present application also discloses a conical dynamic penetrometer automatic testing method, comprising:

[0099] S10, acquiring a specified depth value G0;

[0100] S20, acquiring the number of hammering times and the cumulative penetration depth value G i of the probe rod after the i-th hammering.

[0101] S30, matching the cumulative penetration depth value G i with the specified depth value G0;

[0102] S40, outputting exploration record information based on the matching result of the cumulative penetration depth value G i and the specified depth value G0.

[0103] S50, outputting soil layer exploration information based on the exploration record information.

[0104] With reference to Figure 6 , in S10, comprising:

[0105] S11, acquiring conical dynamic penetrometer type information;

[0106] S12, outputting the specified depth value G0based on the conical dynamic penetrometer type information.

[0107] Specifically, the data stored in the storage module includes preset one-to-one conical dynamic penetration type information, probe and probe rod specification information and specified depth value G0. The probe and probe rod specification information mainly includes the size of the probe and the size of the probe rod.

[0108] Specifically:

[0109] The human-computer interaction device outputs corresponding conical dynamic penetration type information according to the user's operation; the processor selects the corresponding specified depth value G0 from the data based on the conical dynamic penetration type information, and the processor outputs the specified depth value G0 to the processing module;

[0110] In another embodiment:

[0111] The image processing device processes the image of the probe and the probe rod collected by the camera to obtain the probe and probe rod specification information; the processing device selects the corresponding conical dynamic penetration type information and the specified depth value G0 from the data based on the probe and probe rod specification information.

[0112] Regarding S20.

[0113] In one embodiment:

[0114] The ranging device measures and outputs the cumulative penetration depth value of the probe rod, and the processing device receives the cumulative penetration depth value and constructs a "time-cumulative penetration depth value" curve;

[0115] The cumulative penetration depth value of the probe rod increases (jumps) once per hammering, and the cumulative penetration depth value of the probe rod does not increase between adjacent hammering intervals, i.e. in a short time period (such as 0.5S, 0.1s, etc.) sampling, the cumulative penetration depth value of the probe rod is not continuously increased;

[0116] The processing device analyzes the "time-cumulative penetration depth value" curve, and takes the number of increases (jumps) of the cumulative penetration depth value as the number of hammerings.

[0117] In another embodiment:

[0118] The ranging device measures and outputs the cumulative penetration depth value of the probe rod;

[0119] The force sensor measures the load of the dynamic penetration tester and outputs the load information, the processor calculates the current state of the penetration device, and the release of the driving hammer is confirmed by the state change, the number of releases is accumulated, and the total number of releases is the number of hammerings.

[0120] Regarding S30, S40.

[0121] G i-1 <G0<G i , G0-G i-1 <G iIn the case of -G0, the number of hammer blows when the first penetration depth G0 is output is i-1.

[0122] G i-1 <G0<G i G0-G i-1 >G i In the case of -G0, the number of hammer blows when the first penetration depth G0 is output as i.

[0123] G i-1 <G0<G i G0-G i-1 =G i In the case of -G0:

[0124] The number of hammer blows when the first penetration reaches the specified depth G0 is output as i-1;

[0125] or

[0126] Based on G1-G i Construct the test curve and differentiate it to obtain G′ i-1 G′ i ;

[0127] G′ i-1 >G′ i In the case of i-1, the number of hammer blows when the first penetration depth G0 is output as i-1.

[0128] G′ i-1 =G′ i In the case of i-1, the number of hammer blows when the first penetration depth G0 is output as i-1.

[0129] G′ i-1 <G′ i In the case of i, the number of hammer blows when the first penetration depth G0 is output as i.

[0130] G i-k-1 <(n-1)G0<G i-k G i-1 <nG0<G i G i-k +G0-G i-1 <G i -G i-k-1 In the case of -G0, the number of hammer blows when the nth penetration depth is G0 is output as k-1; n≥2, where n is an integer.

[0131] G i-k-1 <(n-1)G0<G i-k G i-1 <nG0<G i G i-k +G0-Gi-1 >G i -G i-k-1 In the case of G0, the number of hammering when the penetration depth value G0 is reached for the nth time is output as k; n≥2, n is an integer.

[0132] G i-k-1 <(n-1)G0<G i-k 、G i-1 <nG0<G i 、G i-k +G0-G i-1 >G i -G i-k-1 In the case of G0, the number of hammering when the penetration depth value G0 is reached for the nth time is output as k+1; n≥2, n is an integer.

[0133] In S50, the soil layer exploration information includes stratum division information, bearing capacity, deformation parameter, compaction degree, etc.

[0134] The implementation principle of the automatic testing method for the cone dynamic sounding is as follows: in the process of the cone dynamic sounding, the number of hammering and the cumulative penetration depth value Gi of the probe rod after the ith hammering are automatically recorded, which is beneficial to guarantee the accuracy of the original data, and then based on the accurate original data, it is beneficial to obtain accurate exploration results.

[0135] Based on the number of hammering to evaluate the bearing capacity of the soil layer, the smaller value of the number of hammering makes the bearing capacity evaluation value lower than the actual bearing capacity value, and based on the bearing capacity evaluation value to carry out the construction of buildings and other buildings above the soil layer, it is beneficial to meet the design and construction requirements of the actual bearing capacity of the soil layer.

[0136] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. An automatic testing method for cone dynamic penetration testing, characterized in that, include: Obtain the specified depth value G0; Obtain the number of hammer blows and the cumulative penetration depth G of the probe after the i-th blow. i ; The cumulative penetration depth value G i Match with the specified depth value G0; Based on the cumulative penetration depth value G i The matching results with the specified depth value G0 are used to output exploration record information; the exploration record information includes the number of hammer blows per penetration depth value G0. Based on the cumulative penetration depth value G i The matching results with the specified depth value G0 are included in the output exploration record information, including: G i-k-1 <(n-1)G0<G i-k G i-1 <nG0<G i G i-k +G0-G i-1 <G i -G i-k-1 In the case of -G0, the number of hammer blows when the nth penetration depth value G0 is output as k-1; G i-k-1 <(n-1)G0<G i-k G i-1 <nG0<G i G i-k +G0-G i-1 >G i -G i-k-1 In the case of -G0, the number of hammer blows when the nth penetration depth value G0 is output as k+1; n≥2。 2. The automatic testing method for conical dynamic penetration testing according to claim 1, characterized in that, Based on the cumulative penetration depth value G i The matching results with the specified depth value G0 are included in the output exploration record information, including: G i-k-1 <(n-1)G0<G i-k G i-1 <nG0<G i G i-k +G0-G i-1 =G i -G i-k-1 In the case of -G0, the number of hammer blows when the nth penetration depth G0 is output as k. n≥2。 3. The automatic testing method for conical dynamic penetration testing according to claim 2, characterized in that, Based on the cumulative penetration depth value G i The matching results with the specified depth value G0 are included in the output exploration record information, including: G i-1 <G0<G i G0-G i-1 <G i In the case of -G0, the number of hammer blows when the first penetration depth G0 is output as i-1; G i-1 <G0<G i G0-G i-1 >G i In the case of -G0, the number of hammer blows when the first penetration depth G0 is output as i.

4. The automatic testing method for conical dynamic penetration testing according to claim 2 or 3, characterized in that, Based on the cumulative penetration depth value G i The matching results with the specified depth value G0 are included in the output exploration record information, including: G i-1 <G0<G i G0-G i-1 =G i In the case of -G0, the number of hammer blows when the first penetration depth G0 is output is i-1.

5. The automatic testing method for conical dynamic penetration testing according to claim 2 or 3, characterized in that, Based on the cumulative penetration depth value G i The matching results with the specified depth value G0 are included in the output exploration record information, including: G i-1 <G0<G i G0-G i-1 =G i In the case of -G0, based on G1-G i Construct the test curve and differentiate it to obtain G′ i-1 G′ i ; G′ i-1 >G′ i In the case of i-1, the number of hammer blows when the first penetration depth G0 is output as i-1. G′ i-1 <G′ i In the case of i, the number of hammer blows when the first penetration depth G0 is output as i.

6. The automatic testing method for conical dynamic penetration testing according to claim 2 or 3, characterized in that, Based on the cumulative penetration depth value G i The matching results with the specified depth value G0 are included in the output exploration record information, including: G i-1 <G0<G i G0-G i-1 =G i In the case of -G0, based on G1-G i Construct the test curve and differentiate it to obtain G′ i-1 G′ i ; G′ i-1 =G′ i In the case of i-1, the number of hammer blows when the first penetration depth G0 is output is i-1.

7. The automatic testing method for conical dynamic penetration testing according to claim 2, characterized in that, Obtaining the specified depth value G0 includes: Obtain information on the type of cone dynamic penetration test; The specified depth value G0 is output based on the cone dynamic penetration test type information.

8. An automatic testing system for cone dynamic penetration testing, characterized in that, include: The storage module is used to store the automatic test program and data for the cone dynamic penetration test; The processing module, when running the automatic cone dynamic penetration test program, executes the steps of the automatic cone dynamic penetration test method according to any one of claims 1-7.

9. An automatic testing device for cone dynamic penetration testing, characterized in that, include: Force sensor used to obtain the number of hammer blows; Displacement sensor, used to obtain the cumulative penetration depth G of the probe. i ; A processing device for running the automatic test program for the cone dynamic penetration test as described in claim 8.

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