A dynamic sounding recording method and apparatus

Abstract

The application discloses a dynamic sounding recording method and device, the device comprises a falling hammer, a dynamic sounding rod, a hammer pad, a laser range finder, a recording device and a computer; the method records the process of the field dynamic sounding test and uploads the process to the computer in real time, determines the occurrence time of each hammering in the sounding test after identification processing; the laser range finder can be controlled to automatically measure the corresponding height of the falling hammer at each hammering, the penetration depth of the dynamic sounding rod in the soil layer at each hammering is calculated according to the height of the falling hammer measured by the laser range finder, and the total penetration depth of the dynamic sounding rod in the soil layer at each hammering is obtained by combining the voice description in the recording, so that the result of the dynamic sounding can be obtained and recorded.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of engineering geological survey, and particularly relates to a dynamic penetration test recording method and device. BACKGROUND

[0002] The dynamic penetration test (DPT) is a common in-situ test method in geotechnical engineering investigation. The method uses a standard mass of a driving hammer to hit a hammer pad at a certain height of free fall. The hammer pad transmits kinetic energy to the probe at the bottom through the drill rod. According to the difficulty of the standard specification probe penetrating into the soil, i.e. the number of hammer blows required to hit a certain distance into the soil, the mechanical properties of the soil layer are determined, and the method has the dual functions of exploration and testing.

[0003] The traditional dynamic penetration test recording is manually counted by the detection personnel on the test site. However, due to the large number of hammer blows and the long test process, and the existence of certain interference in the test site environment, it is easy for the detection personnel to make mistakes in counting the number of hammer blows.

[0004] A Chinese patent with the publication number CN115059046A discloses a dynamic penetration automatic recorder and a control method thereof. The device includes a bottom plate, a connecting rod, a hammer head, and a penetration pipe. The hammer head is connected with a lifting rope. The top end of the connecting rod is fixedly installed with a hammer pad. The bottom end of the connecting rod is fixedly connected with one end of the penetration pipe. The bottom plate is provided with a through hole for the penetration of the connecting rod and the penetration pipe. The side of the hammer pad away from the connecting rod is fixedly installed with a guide rod. The hammer head is slidingly sleeved on the guide rod. The bottom side of the hammer pad is fixedly installed with a first distance sensor. The top side of the hammer pad is fixedly embedded with a first pressure sensor. The top side of the bottom plate is placed with a display. The display is electrically connected to the first pressure sensor and the first distance sensor. However, the device still has the following problems: 1. The device has a large structure, which is not conducive to storage and carrying, and is not convenient to use when the site is limited; 2. A large number of sensors are required, and the installation is complex. SUMMARY

[0005] The purpose of the present application is to overcome at least one of the defects in the prior art, and to provide a dynamic penetration test recording method and device that can record the test results conveniently.

[0006] In order to achieve the above-mentioned purpose, the technical scheme of the present application is as follows:

[0007] In a first aspect, the present application provides a dynamic penetration test recording method, comprising the following steps:

[0008] Step S1, installing the drop hammer and the hammer pad: setting the hammer pad on the soil site of the dynamic sounding test, and setting the drop hammer above the hammer pad; setting the drop hammer as a driving hammer sleeved on the dynamic sounding rod, setting the part of the dynamic sounding rod above the hammer pad as a guide rod, fixing the hammer pad on the bottom of the guide rod, and the guide rod is used for guiding the drop hammer to fall along it and hit the hammer pad; setting the part of the dynamic sounding rod below the hammer pad as a sounding rod, and the bottom end of the sounding rod is used for contacting and penetrating into the soil site to form a test hole site;

[0009] Step S2, installing the laser range finder: installing the laser range finder below the drop hammer and the hammer pad, and making the laser range finder measure the height h of the drop hammer corresponding to the time t in the vertical direction t ;

[0010] Step S3, measuring and recording the initial height of the drop hammer: at the beginning of the dynamic sounding test, the tester controls the laser range finder to measure the initial height h of the hammer pad at the initial time t 00 and records the initial height

[0011] Step S4, on-site recording: recording on site during the whole process of the dynamic sounding test, including:

[0012] Step S41, recording the tester's spoken information: recording the tester's spoken information at the beginning of the dynamic sounding test, and the spoken information includes the soil site information and the initial length L0 of the sounding rod;

[0013] Step S42, recording the hammering sound: recording the sound of the test process throughout the process during the dynamic sounding test;

[0014] Step S5, audio recognition: recognizing the recording content of step S4, including:

[0015] Step S51: identifying the tester's spoken information: identifying the soil site information and the initial length L0 of the sounding rod recorded in step S41;

[0016] Step S52: identifying the hammering sound and the corresponding hammering time: identifying the sound of each time the drop hammer hammers the hammer pad in step S42, and obtaining the hammering time t 0n from the time information of the recording corresponding to each hammering sound

[0017] Step S6, laser range finder measuring the height of the drop hammer: when the hammering is identified in step S52, the laser range finder measures the height of the drop hammer when it falls to the hammer pad at the hammering time t 0n ;​ And record it;

[0018] Step S7: Obtain the hammer drop height corresponding to each hammer strike: Record the hammer strike time t corresponding to each hammer strike sound identified in step S52. 0n The height at which the hammer falls onto the hammer pad, measured and recorded at each hammer strike as recorded in step S6. One-to-one correspondence yields the time t of each hammer strike. 0n The corresponding height of the drop hammer when it lands on the hammer pad

[0019] Step S8: Calculate the hammer displacement at each hammer strike: Calculate the change in hammer height described in steps S3 and S7, and calculate the time t between two adjacent hammer strikes. 0n With t 0n-1 The drop weight displacement that occurs between As in equation (1):

[0020]

[0021] Get the time t of each hammer strike 0n Corresponding drop weight displacement

[0022] Step S9: Calculate the cumulative displacement corresponding to each hammer blow: Identify and count the time period t in step S52. 00 -t 0n Corresponding total number of hammer blows The falling hammer is calculated using equation (2). Cumulative displacement at time 1

[0023] Step S10: Obtain the results of the dynamic penetration test: The dropping hammer described in step S9 is placed at each t 0n Cumulative displacement at time t With each time t 0n Corresponding number of hammer blows Perform a one-to-one correspondence to obtain the cumulative displacement of the falling hammer. The corresponding cumulative number of hammer blows The dynamic penetration test results C corresponding to the fixed displacement SC of each soil point below the surface are calculated according to equation (3). n :

[0024] when hour,

[0025] when hour,

[0026]

[0027] Preferably, between step S8 and step S9, the following steps are performed:

[0028] Step S11, the Mth time of adding drill rod: moving away the drop hammer, the guide rod and the hammer pad, connecting the drill rod between the guide rod and the feeler rod, connecting the guide rod and the hammer pad on the feeler rod, and sleeving the drop hammer on the guide rod and above the hammer pad;

[0029] Before the Mth time of adding the drill rod, the cumulative displacement calculation result is recorded as The height of the last time the drop hammer drops to the hammer pad is recorded as

[0030] The tester controls the laser range finder to measure the initial height of the hammer pad after the Mth time of adding the drill rod Record the length information of adding the drill rod in audio;

[0031] Add the length L of this time of adding the drill rod M As formula (4):

[0032]

[0033] After the nth time of adding the drill rod, the total length L of the drill rod is added n As formula (5):

[0034]

[0035] The total length L of the feeler rod is as formula (6):

[0036]

[0037] Repeat steps S5 to S8;

[0038] Step S12, get the displacement of the drill rod at each time after this time of adding the drill rod: the displacement of the drop hammer at The time corresponding to the displacement is as formula (7):

[0039]

[0040] The cumulative displacement at this time is As formula (8):

[0041]

[0042] Then, step S10 is performed again.

[0043] Preferably, before the drop hammer drops to the height position of the laser range finder, step S11 to step S12 are performed between step S9 and step S10.

[0044] Preferably, if the soil point position encounters a hard interlayer, the following steps are performed between step S12 and step S10:

[0045] Step 13, passing through the hard interlayer: the feeler rod is taken out of the test hole, the drill rod is drilled into the test hole by the drilling machine until it passes through the hard interlayer, then the drill rod is taken out, and the feeler rod is put into the test hole again;

[0046] Step S14, recording the test personnel's spoken information after the Nth time of passing through the hard interlayer: the thickness H of the hard interlayer is recorded N by the test personnel's spoken information;

[0047] Step S15, voice recognition of the thickness of the hard interlayer: the thickness H of the hard interlayer recorded in step S14 is voice recognized N ;

[0048] Step S5 to step S8 are repeated;

[0049] Step S16, calculating the displacement after passing through the hard interlayer this time: the displacement of the drop hammer at time t Mn after passing through the hard interlayer this time is calculated as formula (9):

[0050]

[0051] The cumulative displacement before the Nth time of passing through the hard interlayer is recorded as , then the cumulative displacement at this time is as formula (10):

[0052]

[0053] Then, step S10 is performed again.

[0054] Preferably, after step S10, step S101, correcting the number of hammering: the number of hammering C corresponding to the fixed displacement SC of the segment n is corrected according to formula (11):

[0055] C′ n = αC n (11)

[0056] In formula (11), C′ n is the corrected number of hammering, C n is the measured number of hammering, and α is the correction coefficient.

[0057] Preferably, in step S1, at least two of the laser range finders are used, and the multiple laser range finders are arranged at the same horizontal height.

[0058] In a second aspect, the present application provides a dynamic sounding recording device, comprising a falling hammer, a dynamic sounding rod, a hammer pad, a laser range finder, a recording device and a computer, a vertical through hole is arranged in the falling hammer; the dynamic sounding rod passes through the through hole on the falling hammer; the hammer pad is fixed on the dynamic sounding rod and is below the falling hammer, and the outer diameter of the hammer pad is greater than the inner diameter of the through hole of the falling hammer; the laser range finder is installed below the falling hammer and the hammer pad; the recording device is arranged within a preset distance range from the hammer pad; and the computer is connected with the laser range finder and the recording device.

[0059] Preferably, the device further comprises an additional drill rod, the dynamic sounding rod comprises a guide rod and a sounding rod which are detachably connected, and the drill rod is detachably connected between the guide rod and the sounding rod, so as to increase the overall length of the dynamic sounding rod.

[0060] Preferably, the drill rod is installed on a drilling machine.

[0061] Preferably, a support is arranged on the drilling machine, and the laser range finder is installed on the support.

[0062] The dynamic sounding recording method and device provided by the present application have the following beneficial effects:

[0063] 1. In the traditional dynamic sounding test, the detection personnel at the test site manually count the number of hammering, which is easily disturbed by the environment of the test site and is prone to counting errors. However, the dynamic sounding recording method provided by the present application can accurately record the number of hammering and the displacement at which the hammering occurs, can realize the on-site recording of dynamic sounding, and can conveniently record the test results, which can greatly improve the test accuracy compared with the manual observation of the traditional technology.

[0064] 2. In the traditional dynamic sounding test, the test data is recorded manually, and the on-site recording results need to be re-input into the computer for subsequent data statistical processing during the analysis of the test results. However, the dynamic sounding recording method provided by the present application can directly save the test data in the computer and calculate and process the data through the computer, which can improve the automation degree of the test, save a large amount of data processing time and labor cost, and improve the test efficiency.

[0065] 3. The dynamic sounding recording device provided by the present application is suitable for the dynamic sounding recording method, has a reasonable structure, is easy to install, is convenient to store, carry and transport, saves space, is easy to use, and is convenient to install the laser range finder. BRIEF DESCRIPTION OF DRAWINGS

[0066] Fig. 1 A schematic flowchart of the dynamic penetration recording method provided for the implementation of the present invention.

[0067] Fig. 2 A schematic diagram of the structure of the dynamic penetration recording device provided for the implementation of the present invention.

[0068] Fig. 3 A side view of the power penetration recording device provided for the implementation of the present invention.

[0069] Figure reference numerals:

[0070] 1 is the drop hammer, 2 is the power cone penetrometer, 210 is the guide rod, 220 is the penetrometer rod, 3 is the hammer pad, 4 is the laser rangefinder, 5 is the recording device, 6 is the computer, 7 is the drilling rig, and 8 is the support. Detailed Implementation

[0071] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0072] Example 1

[0073] Please refer to Figs. 1 to 3 A dynamic probe recording method includes the following steps:

[0074] Step S1: Install the drop hammer and hammer pad: Place the hammer pad 3 at the soil point of the dynamic penetration test, and place the drop hammer 1 above the hammer pad 3; set the drop hammer 1 as a through hammer fitted on the dynamic penetration rod 2, set the part of the dynamic penetration rod 2 above the hammer pad 3 as a guide rod 210, and fix the hammer pad 3 to the bottom of the guide rod 210. The guide rod 210 is used to guide the drop hammer 1 down its path and strike the hammer pad 3; set the part of the dynamic penetration rod 2 below the hammer pad 3 as a penetration rod 220, and the bottom end of the penetration rod 220 is used to contact and penetrate the soil point to form the test hole;

[0075] Step S2: Install the laser rangefinder: Install the laser rangefinder 4 below the drop hammer 1 and the hammer pad 3, and make the laser rangefinder 4 measure the height h of the drop hammer 1 at time t in the vertical direction. t ;

[0076] Step S3: Measure and record the initial height of the falling hammer: At the start of the dynamic cone penetration test, the test personnel control the laser rangefinder 4 to measure the initial height t. 00 Initial height of hammer pad 3 And record the initial height.

[0077] Step S4, On-site Recording: Record the entire dynamic penetration test process on-site, including:

[0078] Step S41: Record the test personnel's verbal information: At the beginning of the dynamic penetration test, record the test personnel's verbal information, which includes the soil layer location information and the initial length L0 of the penetration rod 220.

[0079] Step S42: Record the hammering sound: Record the sound of the entire test process during the dynamic penetration test;

[0080] Step S5, Audio Recording Recognition: Recognize the recorded content from step S4, including:

[0081] Step S51: Identify the verbal information provided by the test personnel: Identify the soil layer location information recorded in step S41 and the initial length L0 of the cone probe 220;

[0082] Step S52: Identify the hammering sound and its corresponding hammering time: Identify the sound of each hammer blow of the hammer pad 3 recorded in step S42, and obtain the hammering time t corresponding to each hammering sound from the recording time information. 0n ;

[0083] Step S6: Laser rangefinder measures the height of the falling hammer: When the hammer strike is detected in step S52, the laser rangefinder 4 measures the moment t of the hammer strike. 0n The height of the drop hammer 1 when it falls to the hammer pad 3 And record it;

[0084] Step S7: Obtain the hammer drop height corresponding to each hammer strike: Record the hammer strike time t corresponding to each hammer strike sound identified in step S52. 0n The height of the falling hammer 1 when it lands on the hammer pad 3, as measured and recorded at each hammer blow in step S6. One-to-one correspondence yields the time t of each hammer strike. 0n The height at which the corresponding drop hammer 1 descends to the hammer pad 3

[0085] Step S8: Calculate the hammer displacement at each impact moment: Calculate the change in hammer height 1 in steps S3 and S7, and calculate the time t between two adjacent impact moments. 0n With t 0n-1 The drop weight displacement that occurs between As in equation (1):

[0086]

[0087] Get the time t of each hammer strike 0n Corresponding drop weight displacement

[0088] Step S9: Calculate the cumulative displacement corresponding to each hammer blow: Identify and count the time period t in step S52.00 -t 0n corresponding hammering number The cumulative displacement of the drop hammer 1 at time t is calculated by formula (2) The cumulative displacement of the drop hammer 1 at time t is calculated by formula (2)

[0089] Step S10, obtaining the dynamic sounding test result: the cumulative displacement of the drop hammer 1 at each time t in step S9 is one-to-one corresponding to the hammering number at each time t 0n The cumulative displacement of the drop hammer 1 at time t is calculated by formula (2) The cumulative displacement of the drop hammer 1 at time t is calculated by formula (2) 0n The cumulative displacement of the drop hammer 1 at time t is calculated by formula (2) The cumulative displacement of the drop hammer 1 at time t is calculated by formula (2) The cumulative displacement of the drop hammer 1 at time t is calculated by formula (2) The dynamic sounding test result C corresponding to each fixed displacement SC of the soil layer point below the surface is calculated according to formula (3) n :

[0090] When ,

[0091] When ,

[0092]

[0093] Example 2

[0094] Please refer to Figs. 1 to 3 , a dynamic sounding recording method similar to example 1, the difference is that between step S9 and step S10, the following steps are performed:

[0095] Step S11, the Mth time of adding drill rod: remove the drop hammer 1, the guide rod 210 and the hammer pad 3, connect the drill rod between the guide rod 210 and the sounding rod 210, then connect the guide rod 210 and the hammer pad 3 to the sounding rod 210, and set the drop hammer 1 on the guide rod 210 above the hammer pad 3;

[0096] Before the Mth time of adding drill rod, the cumulative displacement calculation result is recorded as The height of the last drop hammer 1 when it falls to the hammer pad 3 is recorded as

[0097] The test personnel control the laser range finder 4 to measure the initial height of the hammer pad 3 after the Mth time of adding drill rod Record the length information of the added drill rod in the audio;

[0098] Add the length L of the added drill rod this time M As formula (4):

[0099]

[0100] Total length L of the drill rod after the n th time of increasing the drill rod n As formula (5) :

[0101]

[0102] Total length L of the feeler rod 220 is as formula (6) :

[0103]

[0104] Repeat steps S5 to S8;

[0105] Step S12, get displacement of each time of the drill rod after the current time of increasing the drill rod: the hammer 1 after the current time of increasing the drill rod is at the height of the laser range finder 4 The displacement corresponding to the time is as formula (7) :

[0106]

[0107] At this time, the cumulative displacement is As formula (8) :

[0108]

[0109] Then, step S10 is performed again.

[0110] Specifically, when the hammer 1 is lowered to the height position of the laser range finder 4, step S11 to step S12 are performed between step S9 and step S10, so that when the feeler rod 220 penetrates into the soil layer point below a larger depth position as the dynamic penetration test is performed, the height of the hammer pad 3 is relatively low to the height of the laser range finder 4, which affects the ranging work of the laser range finder 4.

[0111] Specifically, in step S1, the bottom of the guide rod 210 and the top of the feeler rod 220 are detachably connected;

[0112] In step S11, when the drill rod is installed, the connecting structure of the bottom of the guide rod 210 and the top of the feeler rod 220 is detached, and the hammer 1, the guide rod 210 and the hammer pad 3 are taken out; the top of the drill rod is connected with the bottom of the guide rod 210, and then the bottom of the guide rod 210 is connected with the bottom of the feeler rod 220, and the hammer 1 is sleeved on the guide rod 210 and arranged above the hammer pad 3;

[0113] Specifically, in step S11, the drill rod is arranged as at least two, and the multiple drill rods are detachably connected in sequence from top to bottom.

[0114] Embodiment 3

[0115] Please refer to Figs. 1 to 3A dynamic sounding recording method similar to that of Embodiment 2, except that, if the soil point encounters a hard interlayer, between step S12 and step S10, the following steps are performed:

[0116] Step 13, passing through the hard interlayer: the sounding rod 220 is taken out of the test hole, the drill rod is drilled into the test hole by the drilling machine 7 until it passes through the hard interlayer, then the drill rod is taken out, and the sounding rod 220 is put back into the test hole again;

[0117] Step S14, recording the test personnel's spoken information after the Nth time of passing through the hard interlayer: the thickness H of the hard interlayer is recorded N by the test personnel's spoken information;

[0118] Step S15, voice recognition of the thickness of the hard interlayer: the thickness H of the hard interlayer recorded in step S14 is voice recognized N ;

[0119] Steps S5 to S8 are repeated;

[0120] Step S16, calculating the displacement after the current time of passing through the hard interlayer: the displacement of the hammer 1 corresponding to the time t Mn after the current time of passing through the hard interlayer is calculated as formula (9):

[0121]

[0122] The cumulative displacement before the Nth time of passing through the hard interlayer is recorded as Then the cumulative displacement at this time is as formula (10):

[0123]

[0124] Then, step S10 is performed again.

[0125] Preferably, after step S10, step S101, correcting the number of hammering, is performed: the number of hammering C corresponding to the fixed displacement SC of the segment is corrected n according to formula (11):

[0126] C′ n = αC n (11)

[0127] In formula (11), C′ n is the corrected number of hammering, C n is the measured number of hammering, and a is the correction coefficient.

[0128] According to the building foundation detection specification JGJ340-2015, when the weight of the drop hammer 1 is 63.5 kg, it is a heavy-duty conical dynamic sounding structure, and the correction coefficient a is selected according to the following table 1 and is corrected by formula (10); when the weight of the drop hammer 1 is 120 kg, it is an extra-heavy conical dynamic sounding structure, and the correction coefficient a is selected according to the following table 2 and is corrected by formula (10).

[0129] In the formula, the conical dynamic sounding structure refers to the probe at the bottom end of the sounding rod 210 being in the shape of an inverted cone.

[0130] Table 1, correction coefficient a selection table for heavy-duty conical dynamic sounding structure

[0131]

[0132] In table 1, the left vertical first column represents the length of the drill rod, which is 2 m, 4 m, 6 m, …, 20 m. The right horizontal second row represents the number of hammering of the drop hammer 1, which is 5 times, 10 times, 15 times, …, 50 times. When the correction coefficient a is selected, the value at the intersection of the drill rod length and the number of hammering in table 1 is the corresponding correction coefficient a. For example, the drill rod length is 4 m and the number of hammering is 20 times, and the corresponding correction coefficient a is 0.92; the drill rod length is 16 m and the number of hammering is 35 times, and the corresponding correction coefficient a is 0.51.

[0133] Table 2, correction coefficient a selection table for extra-heavy conical dynamic sounding structure

[0134]

[0135]

[0136] The use method of table 2 is referred to the use method of table 1 above.

[0137] After correction by formula (10), the number of hammering can be used to judge the mechanical properties of the corresponding soil layer, and the processing flow is recorded in the computer 6, so that the number of hammering required to hit the sounding rod 210 into the soil layer to a certain depth is obtained, and the mechanical properties of the soil layer at that depth are determined, that is, the test result of the dynamic sounding test.

[0138] In the dynamic sounding recording method of any embodiment, specifically, in step S2, the laser range finder 4 and the computer 6 are connected through data line or wireless network data communication, so that the height h t The data is transmitted to the computer 6 in real time and saved therein. The laser range finder 4 can be set as an infrared laser range finder. The computer 6 can control the laser ranging sensor 3 in real time through the RS232 serial port line and obtain the height h tData of the height of the falling weight 1 at each time point and the corresponding time point t 0n Real-time transmission to the computer 6.

[0139] In the dynamic sounding recording method of any embodiment, specifically, in step S6, the test personnel on site control the laser range finder 4 to measure the height of the falling weight 1 at the time point t 0n The height of the falling weight 1 falling to the hammer pad 3

[0140] In the dynamic sounding recording method of any embodiment, specifically, in step S1, at least two laser range finders 4 are used, and the multiple laser range finders 4 are arranged at the same horizontal height, so as to avoid that the laser range finder 4 will heat up and affect the measurement accuracy after working for a long time, and therefore the multiple laser range finders 4 are used to work in turns.

[0141] In the dynamic sounding recording method of any embodiment, specifically, in step S4, the recording device 5 is connected with the computer 6, and the recording of the recording device 5 is transmitted to the computer 6 for saving and real-time identification.

[0142] In the dynamic sounding recording method of any embodiment, specifically, in step S4, the distance between the recording device 5 and the hammer pad 3 is set to ≤3m, so as to clearly record the sound of the falling weight 1 hammering the hammer pad 3, and facilitate accurate identification of the sound of the falling weight 1 hammering the hammer pad 3 in step S52.

[0143] In the dynamic sounding recording method of any embodiment, specifically, in step S4, the distance between the recording device 5 and the drilling rig 7 is set to ≤2m.

[0144] In the dynamic sounding recording method of any embodiment, specifically, in step S41, the recorded spoken information of the test personnel includes the hole number information, the hole mouth elevation information and the soil layer type information of the soil layer point of the dynamic sounding rod 2 tested at the soil layer point.

[0145] In the dynamic sounding recording method of any embodiment, specifically, in step S41, the test personnel describes the recording on site to avoid the time point of the falling weight 1 hammering the hammer pad 3, so as to clearly record the spoken information of the test personnel, and facilitate accurate identification of the spoken information of the test personnel in step S51.

[0146] In the dynamic sounding recording method of any embodiment, specifically, in step S5, noise reduction processing is performed on the recording.

[0147] In the dynamic sounding recording method of any of the embodiments, specifically, in step S5, the identification result of the recording can be manually checked, and if an error is found, the test result is recalculated and corrected.

[0148] Embodiment 4

[0149] Please refer to Fig. 2 and Fig. 3 A dynamic sounding recording device, comprising a drop hammer 1, a dynamic sounding rod 2, a hammer pad 3, a laser range finder 4, a recording device 5, and a computer 6, the drop hammer 1 is internally provided with a vertical through hole; the dynamic sounding rod 2 passes through the through hole on the drop hammer 1; the hammer pad 3 is fixed on the dynamic sounding rod 2 and is located below the drop hammer 1, and the outer diameter of the hammer pad 3 is greater than the inner diameter of the through hole of the drop hammer 1; the laser range finder 4 is installed below the drop hammer 1 and the hammer pad 3; the recording device 5 is arranged within a preset distance range from the hammer pad 3; and the computer 6 is connected with the laser range finder 4 and the recording device 5.

[0150] The dynamic sounding recording device of the embodiment is applicable to the dynamic sounding recording method of any of the embodiments.

[0151] Specifically, the bottom end of the dynamic sounding rod 2 is provided in a reverse conical shape.

[0152] Specifically, the preset distance between the recording device 5 and the hammer pad 3 can be set to ≤3m.

[0153] Specifically, the device further comprises an additional drill rod, the dynamic sounding rod 2 comprises a guide rod 210 and a sounding rod 220 connected in a detachable manner, and the drill rod is detachably connected between the guide rod 210 and the sounding rod 220, so as to increase the overall length of the dynamic sounding rod 2. At this time, the device is applicable to the dynamic sounding recording method of embodiment 2.

[0154] For example, the top of the drill rod is provided with a first threaded structure, and the bottom of the drill rod is provided with a second threaded structure, the first threaded structure and the second threaded structure are matched;

[0155] The bottom of the guide rod 210 is provided with a third threaded structure, and the top of the sounding rod 220 is provided with a fourth threaded structure, the third threaded structure and the fourth threaded structure are matched;

[0156] The first threaded structure and the third threaded structure are matched, and the third threaded structure and the fourth threaded structure are matched;

[0157] The top of the drill rod and the bottom of the guide rod 210 are connected through the first threaded structure and the third threaded structure, and the bottom of the drill rod and the top of the sounding rod 220 are connected through the third threaded structure and the fourth threaded structure.

[0158] The first threaded structure can be a first threaded hole, the second threaded structure can be a second threaded rod, the third threaded structure can be a third threaded rod, and the fourth threaded structure can be a fourth threaded hole. The third threaded rod at the bottom of the guide rod 210 is inserted into the fourth threaded hole at the top of the feeler rod 220.

[0159] At this time, in step S91 of the power feeler recording method, the guide rod 210 can be rotated so that the third threaded rod at the bottom of the guide rod 210 is removed from the fourth threaded hole at the top of the feeler rod 220; then the third threaded rod at the bottom of the guide rod 210 is rotated and connected into the first threaded hole at the top of the drill rod, and the second threaded rod at the bottom of the drill rod is rotated and connected into the fourth threaded hole at the top of the feeler rod 220, to realize the connection of the power feeler rod 2 and the drill rod.

[0160] When multiple drill rods need to be connected, the second threaded rod at the bottom of the drill rod above is sequentially rotated and connected into the first threaded hole at the top of the drill rod below, to realize the connection of multiple drill rods.

[0161] Specifically, the drill rod is installed on the drilling machine 7. At this time, the device can be applied to the power feeler recording method of embodiment 3.

[0162] Specifically, a support 8 is arranged on the drilling machine 7, and the laser range finder 4 is installed on the support 8. The support 8 can be a rectangular frame. The support 8 can coincide with the central axis of the drill rod, facilitating the installation of more laser range finders 4. When the laser range finder 4 is installed on the support 8, the laser range finder 4 can be installed directly below the drop hammer 1 and the hammer pad 3, and the top of the laser range finder 4 is ensured not to be blocked by the hammer pad 3, so that the laser range finder 4 can normally measure the distance.

[0163] Specifically, the laser range finder 4 is provided with at least two, and multiple laser range finders 4 are arranged at the same horizontal height position.

[0164] The above embodiments are only examples for clear illustration, and are not limitations on the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments cannot be exhausted, and the obvious changes or variations derived therefrom are still within the protection scope of the present application.

[0165] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0166] In the description of the application, it is to be understood by those skilled in the art that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the device or element referred to has a particular orientation, is constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. In addition, the terms "first", "second" and the like are only for the purpose of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0167] In the description of the application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

Claims

1. A dynamic sounding method, characterized by, The method comprises the following steps: Step S1, installing a drop hammer and a hammer pad: the hammer pad is arranged on a soil point of a dynamic sounding test, and the drop hammer is arranged above the hammer pad; the drop hammer is arranged as a driving hammer sleeved on a dynamic sounding rod, a portion of the dynamic sounding rod above the hammer pad is arranged as a guide rod, and the hammer pad is fixedly connected to the bottom of the guide rod, and the guide rod is used for guiding the drop hammer to fall along the guide rod and hit the hammer pad; The part of the power sounding rod below the hammer pad is set as a sounding rod, and the bottom end of the sounding rod is used to contact and penetrate into the soil point to form a test hole; step S2, installing a laser range finder: the laser range finder is installed below the drop hammer and the hammer pad, and the laser range finder measures the height of the drop hammer corresponding to the time t in the vertical direction ; Step S3, measuring and recording the drop height of the hammer: at the beginning of the dynamic penetration test, the test person controls the laser distance meter to measure the initial height of the hammer cushion at the initial time and records the initial height . Step S3, measuring and recording the drop height of the hammer: at the beginning of the dynamic penetration test, the test person controls the laser distance meter to measure the initial height of the hammer cushion at the initial time and records the initial height . Step S3, measuring and recording the drop height of the hammer: at the beginning of the dynamic penetration test, the test person controls the laser distance Step S4, on-site recording: on-site recording is performed during the whole process of the dynamic sounding test, including: Step S41, record the test personnel's oral information: at the beginning of the dynamic penetration test, record the test personnel's oral information, the oral information includes the soil layer point information and the initial length of the penetration rod ; Step S42, recording hammering sound: recording sound of the whole test process during the dynamic sounding test; Step S5, recording identification: identifying the recording content of the recording of step S4, including: Step S51: recognizing the test personnel's spoken information: recognizing the soil layer point information recorded in step S41 and the initial length of the sounding rod ; Step S52: identifying the hammering sound and its corresponding hammering time: identifying the sound of each drop of the falling hammer hitting the hammer pad recorded in step S42, and obtaining the hammering time corresponding to each hammering sound from the time information of the recording ; Step S6, laser rangefinder measures drop height: when the hammer blow is identified in step S52, the laser rangefinder measures the height to which the drop hammer descends upon the anvil at the moment of the hammer blow and records it ; Step S7, obtaining the height of the falling hammer 1 corresponding to the hammering time: taking the hammering time corresponding to the hammering sound identified in step S52 in the recording , and the height of the falling hammer 1 when falling onto the hammer pad measured and recorded when each hammering occurs in step S6 One-to-one correspondence, obtaining the height of the falling hammer 1 when falling onto the hammer pad corresponding to the hammering time Corresponding to the height of the falling hammer 1 when falling onto the hammer pad ; Step S8, calculating the drop hammer displacement occurring at the hammering time: calculating the change of the drop hammer height described in Step S3 and Step S7, calculating the drop hammer displacement occurring between the hammering time of adjacent two times With the drop hammer displacement as formula (1): （1）； obtaining the time of occurrence of each hammer blow corresponding drop hammer displacement ; Step S9, calculating the accumulated displacement corresponding to each hammering: identifying and counting the time period through step S52 the corresponding total number of hammerings , calculating the accumulated displacement corresponding to the time instant through formula (2) of the falling hammer : （2）； Step S10, obtaining the dynamic sounding test result: one-to-one correspondence between the cumulative displacement of the falling hammer at each time point and the number of hammering at each time point in step S9, to obtain the cumulative number of hammering of the falling hammer at each cumulative displacement corresponding to each time point corresponding to each time point corresponding to each time point corresponding to each time point corresponding to each time point corresponding to each time point corresponding to each time point corresponding to each time point When time, ; When , , （3）。 2. The dynamic sounding method according to claim 1, wherein, Between step S8 and step S9, the following steps are performed: Step S11, the first Second additional drill pipe: the hammer, the guide rod and the hammer pad away, the drill pipe is connected between the guide rod and the probe rod, and the guide rod and the hammer pad are connected on the probe rod, and the hammer sleeve is set on the guide rod and is arranged above the hammer pad; The first The cumulative displacement calculation result before the drill pipe is added is recorded as The height of the last time the drop hammer drops to the hammer pad is recorded as ; The tester controls the laser range finder to measure the first After the drill pipe is added, the tester controls the laser range finder to measure the initial height of the hammer pad The audio recording adds the length information of the drill pipe Length of the drill pipe added this time As formula (4): （4）； after the n-th increase of the drill pipe, increasing the total length of the drill pipe as formula (5): （5）； total length of the feeler rod as formula (6): （6）； Steps S5 to S8 are repeated; Step S12, obtaining the displacement of the drill pipe at each time point after the current increase: the displacement of the drop hammer at the time point after the current increase of the drill pipe is as formula (7): (7) （7）； The accumulated displacement at this time As equation (8): （8）； Then, step S10 is performed again.

3. The dynamic penetrometer logging method according to claim 2, wherein, Between step S9 and step S10, steps S11 to S12 are performed when the drop hammer falls to the height position of the laser range finder.

4. The dynamic sounding method according to claim 2, wherein, If the soil point encounters a hard interlayer, the following steps are performed between step S12 and step S10: Step S13, passing through the hard interlayer: the sounding rod is taken out of the test hole, a drill rod is drilled into the test hole by a drilling machine until the drill rod passes through the hard interlayer, then the drill rod is taken out, and the sounding rod is placed in the test hole again; Step S14, the first After the second time through the hard interlayer, the recording test person speaks information: spoken information through the thickness of the hard interlayer ​ Step S15, voice recognition hard interlayer thickness: the thickness of the recorded hard interlayer in the voice recognition step S14 ; Steps S5 to S8 are repeated; Step S16, calculate the displacement after this time through the hard layer: the drop hammer in the displacement after this time through the hard layer corresponding to the time As formula (9): （9）； Let the cumulative displacement before the first pass through the hard layer be denoted by Let the cumulative displacement before the second pass through the hard layer be denoted by Then the cumulative displacement at this time is As in equation (10): （10）； Then, step S10 is performed again.

5. The dynamic sounding method according to any one of claims 1 to 4, wherein, After step S10, step S101, correcting the number of hammering: the number of hammering corresponding to the fixed displacement of the segment is corrected in accordance with equation (11) : （11）； In formula (11), is the corrected number of hammer blows, is the measured number of hammer blows, is the correction factor.

6. The dynamic sounding recording method according to claim 5, characterized in that, In step S1, at least two laser range finders are used, and the multiple laser range finders are arranged at the same horizontal height.

7. A dynamic penetrometer recording device, characterized by The dynamic sounding recording device for implementing the dynamic sounding recording method according to claim 4 comprises a drop hammer, a dynamic sounding rod, a hammer pad, a laser range finder, a recording device, and a computer, the inside of the drop hammer is provided with a vertical through hole, the dynamic sounding rod passes through the through hole of the drop hammer, the hammer pad is fixed on the dynamic sounding rod and below the drop hammer, and the outer diameter of the hammer pad is greater than the inner diameter of the through hole of the drop hammer, the laser range finder is installed below the drop hammer and the hammer pad, the recording device is arranged within a preset distance range from the hammer pad, the computer is connected with the laser range finder and the recording device, the device further comprises an additional drill rod, the dynamic sounding rod comprises a guide rod and a sounding rod which are detachably connected, and the drill rod is detachably connected between the guide rod and the sounding rod, used for increasing the overall length of the dynamic sounding rod, and the drill rod is installed on a drilling machine.

8. The powered sounding device of claim 7, wherein, A support is arranged on the drilling machine, and the laser range finder is installed on the support.

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