CN104101896B - Pile bottom cave sonar detection device and method - Google Patents

Pile bottom cave sonar detection device and method Download PDF

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Publication number
CN104101896B
CN104101896B CN201410276785.5A CN201410276785A CN104101896B CN 104101896 B CN104101896 B CN 104101896B CN 201410276785 A CN201410276785 A CN 201410276785A CN 104101896 B CN104101896 B CN 104101896B
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sonar
stress wave
stake
chip microcomputer
detection
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CN104101896A (en
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刘鎏
陶凤娟
刘春生
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Wuhan Changsheng Engineering Detection Tech Dev Co Ltd
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Wuhan Changsheng Engineering Detection Tech Dev Co Ltd
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Abstract

The invention discloses a pile bottom cave sonar detection device and method. The signal output end of a three-dimensional electronic compass it connected with the compass signal input end of a single-chip microcomputer. The signal input end of a sonar stress wave driving module is connected with the signal output end of the single-chip microcomputer. The stress wave driving signal output end of the sonar stress wave driving module is connected with a sonar stress wave transmitter. A sonar stress wave receiving sensor is connected with the sonar signal input end of the single-chip microcomputer through a sonar stress wave signal processing module. The communication end of the single-chip microcomputer is connected with an on-site host through a communication cable. A sonar detection probe is perpendicular to the bottom of a pile. The pile bottom cave sonar detection device and method, which are provided by the invention, can carry out detailed karst cave or weak rock detection on an area below the pile bottom, and can accurately determine whether a karst cave or weak rock is in a pile bottom detection range, wherein the karst cave or the weak rock influences the bearing capacity of the pile bottom.

Description

A kind of stake bottom solution cavity sonar detection device and method
Technical field
The present invention relates to applied geophysics sonar detection technical field, in particular to a kind of solution cavity sonar detection of stake bottom Device and detection method.
Background technology
Stake bottom CAVE DETECTION is presently mainly that the geological prospecting carrying out small-bore (generally 5 to 10mm) in stake holes position is bored Hole, gets into 5 meters about below a bottom design attitude, and being considered as this bottom when boring 8 does not run into solution cavity 9 does not have solution cavity, such as Shown in Fig. 1.But, the place producing solution cavity is all limestone area, limestone easily corrosion, and corrosion is complex-shaped various, and one is little Boring it is difficult to ensure that detect accurate one 1 meter to the stake holes bottom of 3 rice diameters 5 meters within whether have solution cavity, often occur one A little stake bottoms while being rock, be solution cavity or soil situation (when solution cavity is present in below stake holes but in stake holes be not just During lower section, carry out boring CAVE DETECTION at the center of stake holes and arise that the feelings detecting less than the solution cavity being present in below stake holes Condition.If it is partially soil layer that the bottom of stake holes there are one, when major part is rock stratum, carry out, at the center of stake holes, solution cavity spy of holing Survey the situation about detecting less than the small part soil layer being present in stake holes bottom that also occurs), if stake bottom solution cavity is not sent out in time The bearing capacity of pile foundation now can be caused significantly to reduce, cause building to decline situation that is uneven or building inclination occurring and topples over, Cause extreme loss to people's lives and properties.
Some artificial digging piles can reach a bottom due to testing staff at present, has carried out the detection method of some physical prospectings, such as Geological radar and seismic wave method, and achieve some application effects;But, current stake holes great majority are rotary drillings or impact into Hole, is all mud serosity in stake holes, and personnel cannot reach a bottom and be detected;Therefore, just stake bottom preferably cannot be visited Survey, cause the very scabrous problem of a bottom solution cavity.
List of references: " the CAVE DETECTION technical research of Pile bottom ", Chongqing Jiaotong University master opinion in 2012 Literary composition, the big light of white silk writes.
P304 page of list of references " PRINCIPLE OF SEISMIC PROSPECTING WITH and method ", Geology Publishing House, 1986.
Content of the invention
Present invention aim to providing a kind of stake bottom solution cavity sonar detection device and detection method, by this device and Method, can carry out detailed solution cavity to stake bottom lower zone or soft rock mass detects, and in the range of energy Accurate Determining stack base exploration Solution cavity with the presence or absence of impact stake bottom bearing capacity and soft stratum.
For realizing this purpose, stake bottom solution cavity sonar detection device designed by the present invention, it includes being arranged on showing outside stake Field main frame and the sonar detection probe being arranged on a bottom, described sonar detection probe includes sonar stress wave drive module, sonar Stress wave launcher, sonar stress wave receive sensor, sonar stress wave signal processing module, single-chip microcomputer and three-dimensional electronic sieve Disk, wherein, the signal output part of described three-dimensional electronic compass connects the compass signal input of single-chip microcomputer, and sonar stress wave drives The signal input part of module connects the stress wave signal outfan of single-chip microcomputer, and the stress wave of sonar stress wave drive module drives letter Number outfan connects sonar stress wave launcher, and described sonar stress wave receives sensor and processes mould by sonar stress wave signal Block connects the sonar signal input of single-chip microcomputer, and the communication ends of described single-chip microcomputer connect live main frame by communication cable, described Sonar detection probe vertical is in stake bottom.
A kind of stake bottom CAVE DETECTION method using above-mentioned stake bottom solution cavity sonar detection device is it is characterised in that it includes Following steps:
Step 1: pour into water at the stake bottom of stake holes, make a bottom have the high water layer of 10~20cm, now sonar detection is popped one's head in It is immersed in above-mentioned water layer;
Step 2: live main frame passes through communication cable and sends the control of sonar stress wave to the single-chip microcomputer in sonar detection probe Instruction, single-chip microcomputer sends sonar stress wave control signal according to sonar stress wave control instruction to sonar stress wave drive module, Sonar stress wave drive module controls sonar stress wave launcher transmitting work(in side's under stake according to sonar stress wave control signal Rate scope is 1kw~7kw, and frequency range is the sonar stress wave of 1000~10000hz, and each sonar stress wave receives sensor Receive the reflected signal of an above-mentioned sonar stress wave, each sonar stress wave signal processing module is to corresponding sonar stress The reflected signal of ripple is amplified process, Filtering Processing and analog-to-digital conversion process successively, obtains the sonar stress after one group of process The reflected signal of ripple, the reflected signal of the sonar stress wave after one group of process is sent to list by sonar stress wave signal processing module Piece machine, meanwhile, three-dimensional electronic compass senses that in sonar detection probe, each sonar stress wave receives sensor direction now, Thus obtaining one group of bearing data, and by this group direction data transfer to single-chip microcomputer;
Step 3: the reflected signal of the sonar stress wave after above-mentioned one group process is transferred to by single-chip microcomputer by communication cable Live main frame, simultaneously single-chip microcomputer by above-mentioned sonar stress wave reception sensor one group of bearing data now passed by communication cable It is defeated by live main frame;
Step 4: by sonar detection 20~30 degree of rotation of probe, and repeat step 2 and step 3, make live main frame obtain The reflected signal of sonar stress wave after processing to another group and all sonar stress waves receive sensor after rotation another Group bearing data, live host computer above-mentioned two groups process after the reflected signal of sonar stress wave and two groups of sonar stress waves connect Receive the sonar reflection stress wave wavy profile that sensor orientation data obtains tested surface according to existing sonar stress wave imaging method Figure;
Step 5: existing stess wave method is carried out to the sonar reflection stress wave wavy profile figure of above-mentioned tested surface and divides Analysis determines that stake bottom bottom part down 10m whether there is solution cavity or soft rock mass with inner region.
The application present invention can realize the detection of a bottom solution cavity or soft rock mass, sets compared to existing stake bottom CAVE DETECTION Standby and method, beneficial effects of the present invention are mainly manifested in:
(1) adopt the present invention, by sonar detection probe placement in stake bottom, the spy of achievable stake bottom solution cavity and soft stratum Survey, it is applied to all stake holes forms of construction work, and speed of detection is fast, result of detection is accurate, do not have anthropic factor to affect, will not delay Construction speed.
(2) present invention achieves the gross area at stake bottom detects, be not in bore detecting limitation and delaying construct into Degree problem, is not in the problem that only artificial digging pile just can carry out comprehensive detection of radar and seismic wave method, is pile foundation construction Quality safety provides and preferably ensures.
(3) can realize intuitively showing result of detection in real time during live host detection using the present invention, and generate detection Analysis results figure, artificial data analysis that need not be complicated and processing stage.Therefore, assembly of the invention possesses operability, standard Really the advantages of property, practicality.
(4) measurement result that the present invention obtains compares the result that traditional boring CAVE DETECTION mode obtains, and has higher Accuracy, any dead angle at a bottom will not be omitted.
Brief description
Fig. 1 is the schematic diagram of existing boring CAVE DETECTION method;
Fig. 2 is the structural representation of the present invention;
Fig. 3 is the structured flowchart of live main frame in the present invention;
Fig. 4 is the structured flowchart of sonar detection probe in the present invention;
Fig. 5 is that in the present invention, sonar stress wave receives the scattergram in sonar detection probe bottom for the sensor.
Wherein, 1 live main frame, 1.1 system bus, 1.2 central processing units, 1.3 memorizeies, 1.4 man-machine Interactive device, 1.5 usb communication interfaces, 2 sonar detection probes, 2.1 sonar stress wave drive modules, 2.2 three-dimensional electricity At sub- compass, 2.3 sonar stress wave launchers, 2.4 sonar stress waves reception sensors, 2.5 sonar stress wave signals Reason module, 2.6 single-chip microcomputers, 3 communication cables, 4 bottoms, 5 stake holes, 6 aperture supports, 7 water layers, 8 borings, 9 solution cavities.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:
The ultimate principle of the present invention is: stake bottom solution cavity and soft stratum form an obvious boundary of change with the rock mass at stake bottom Face, this interface is mainly manifested in the impact to stress wave velocity of wave of the density of rock or soil, and therefore, this interface is to sonar stress The transmission of ripple can produce stronger reflection echo, when sonar transmission probe Firing Sonar in the slurry liquid at stake bottom 4, sonar meeting By the rock mass travel downward at stake bottom 4, if run in communication process to produce reflection echo when solution cavity or soft rock mass, echo meeting Received sensor 2.4 by sonar stress wave to receive, the echo-signal according to receiving just can detect a bottom well and whether there is Solution cavity or soft stratum.
Stake bottom solution cavity sonar detection device as shown in Figure 2-5, it includes the live main frame 1 being arranged on outside stake and setting Sonar detection probe 2 at stake bottom 4, described sonar detection probe 2 includes sonar stress wave drive module 2.1, sonar stress wave Emitter 2.3, sonar stress wave receive sensor 2.4, sonar stress wave signal processing module 2.5, single-chip microcomputer 2.6 and three-dimensional electricity Sub- compass 2.2, wherein, the signal output part of described three-dimensional electronic compass 2.2 connects the compass signal input of single-chip microcomputer 2.6, The signal input part of sonar stress wave drive module 2.1 connects the stress wave signal outfan of single-chip microcomputer 2.6, and sonar stress wave drives The stress wave drive signal outfan of dynamic model block 2.1 connects sonar stress wave launcher 2.3, and described sonar stress wave receives sensing Device 2.4 connects the sonar signal input of single-chip microcomputer 2.6, described single-chip microcomputer 2.6 by sonar stress wave signal processing module 2.5 Communication ends live main frame 1 is connected by communication cable 3, described sonar detection probe 2 is perpendicular to stake bottom 4.
In technique scheme, described scene main frame 1 includes system bus 1.1, central processing unit 1.2, memorizer 1.3 (for being stored the sonar data in the direction and inclination data and detection reception that obtain sonar detection probe 2), man-machine Interactive device 1.4, usb (universal serial bus, USB (universal serial bus)) communication interface 1.5 (are used for realizing the present invention Live main frame 1 and ancillary equipment between data communication), wherein, described central processing unit 1.2, memorizer 1.3, man-machine friendship Mutually equipment 1.4 (including touch screen, display screen and photoelectricity knob (being equivalent to computer mouse)), usb communication interface 1.5 be all and system Bus 1.1 connects.
In technique scheme, it also includes being erected at the aperture support 6 at stake holes 5 top, and described aperture support 6 is in stake mouth Hold up communication cable 3.
In technique scheme, described sonar stress wave receives sensor 2.4 and sonar stress wave signal processing module 2.5 All there are 4~8, each sonar stress wave receives sensor 2.4 all by corresponding sonar stress wave signal processing module 2.5 even Connect the sonar signal input of single-chip microcomputer 2.6.Described 4~8 sonar stress waves receive sensor 2.4 along sonar detection probe 2 The circumference of bottom is evenly arranged.
In technique scheme, the sonar stress wave launcher 2.3 in described sonar detection probe 2, sonar stress wave connect Receive sensor 2.4 and three-dimensional electronic compass 2.2 is each perpendicular to a bottom 4.
Each equipment described in technique scheme is the existing equipment of maturation in itself.
A kind of stake bottom CAVE DETECTION method using above-mentioned stake bottom solution cavity sonar detection device, it comprises the steps:
Step 1: pour into water at the stake bottom 4 of stake holes 5, make a bottom 4 have the high water layer of 10~20cm 7, now sonar detection Probe 2 is immersed in above-mentioned water layer 7 (just calls in the stress wave of water transmission and receives, wherein water is the best coupling of stress wave again Agent, can make with water the stress wave on a bottom interface pass through Water transport to receiving in sensor, be received sensor and receive);
Step 2: live main frame 1 passes through communication cable 3 and sends sonar stress to the single-chip microcomputer 2.6 in sonar detection probe 2 Ripple control instruction, single-chip microcomputer 2.6 sends sonar stress according to sonar stress wave control instruction to sonar stress wave drive module 2.1 Wave control signal, sonar stress wave drive module 2.1 controls sonar stress wave launcher 2.3 according to sonar stress wave control signal It is 1kw~7kw to stake bottom 4 lower section transmission power scope, frequency range is the sonar stress wave of 1000~10000hz, each sound Stress wave of receiving receives the reflected signal that sensor 2.4 receives an above-mentioned sonar stress wave, at each sonar stress wave signal Reason module 2.5 is amplified process, Filtering Processing and analog-to-digital conversion process successively to the reflected signal of corresponding sonar stress wave, Obtain the reflected signal of the sonar stress wave after one group of process, after one group is processed by sonar stress wave signal processing module 2.5 The reflected signal of sonar stress wave is sent to single-chip microcomputer 2.6, and meanwhile, three-dimensional electronic compass 2.2 senses in sonar detection probe 2 Each sonar stress wave receives sensor 2.4 direction now, thus obtaining one group of bearing data, and this group bearing data is passed It is defeated by single-chip microcomputer 2.6;
Step 3: the reflected signal of the sonar stress wave after above-mentioned one group process is passed by single-chip microcomputer 2.6 by communication cable 3 It is defeated by live main frame 1, above-mentioned sonar stress wave reception sensor 2.4 one group of bearing data now is led to by single-chip microcomputer 2.6 simultaneously Cross communication cable 3 and be transferred to live main frame 1;
Step 4: 20~30 degree of sonar detection probe 2 rotation (is selected this number of rotation can improve stake bottom 4 bottom part down inspection Survey the accuracy of result), and repeat step 2 and step 3, the sonar stress after making live main frame 1 obtain another group of process The reflected signal of ripple and all sonar stress waves receive sensor 2.4 another group of bearing data after rotation, live main frame 1 profit The reflected signal of the sonar stress wave after being processed with above-mentioned two groups and two groups of sonar stress waves receive sensor 2.4 bearing data root Obtain the sonar reflection stress wave wavy profile figure of tested surface according to existing sonar stress wave imaging method;Such processing form energy More accurately determine that stake bottom 4 bottom part down whether there is solution cavity or soft rock mass);
Step 5: existing stess wave method is carried out to the sonar reflection stress wave wavy profile figure of above-mentioned tested surface and divides Analysis determination (p304 page of list of references " PRINCIPLE OF SEISMIC PROSPECTING WITH and method ", Geology Publishing House, 1986) stake bottom 4 bottom part down 10m (stake bottom 4 bottom part down 10m region below is 1kw~7kw for power bracket, and frequency range is the stress wave of 1000~10000hz Net long wave radiation region) with inner region whether there is solution cavity or soft rock mass.
Technical staff confirms a bottom the need of carrying out a bottom basement process according to the result of above-mentioned test.
In the step 2 of technique scheme, three-dimensional electronic compass 2.2 by sonar detection probe 2, visit by sonar detection now Head inclination data is also transmitted to single-chip microcomputer 2.6;In step 3, sonar detection probe inclination data is passed through communication electricity by single-chip microcomputer 2.6 Cable 3 is transferred to the central processing unit 1.2 of live main frame 1, and the central processing unit 1.2 of live main frame 1 inclines according to sonar detection probe Angular data confirms whether sonar detection probe 2 now is vertical with stake bottom 4, if sonar detection probe 2 is not vertical with stake bottom 4, Need by sonar detection probe 2 be adjusted to vertical with stake bottom 4.
The content that this specification is not described in detail belongs to prior art known to professional and technical personnel in the field.

Claims (6)

1. the stake bottom CAVE DETECTION method of a kind of utilization stake bottom solution cavity sonar detection device, described stake bottom solution cavity sonar detection device Including the live main frame (1) being arranged on outside stake with sonar detection probe (2) that is arranged on a bottom (4), described sonar detection probe (2) sonar stress wave drive module (2.1), sonar stress wave launcher (2.3), sonar stress wave reception sensor are included (2.4), sonar stress wave signal processing module (2.5), single-chip microcomputer (2.6) and three-dimensional electronic compass (2.2), wherein, described three The signal output part of dimension electronic compass (2.2) connects the compass signal input of single-chip microcomputer (2.6), sonar stress wave drive module (2.1) signal input part connects the stress wave signal outfan of single-chip microcomputer (2.6), sonar stress wave drive module (2.1) Stress wave drive signal outfan connects sonar stress wave launcher (2.3), and described sonar stress wave receives sensor (2.4) and leads to Cross the sonar signal input that sonar stress wave signal processing module (2.5) connects single-chip microcomputer (2.6), described single-chip microcomputer (2.6) Communication ends pass through communication cable (3) and connect live main frame (1), perpendicular to stake bottom (4), it is special for described sonar detection probe (2) Levy and be: stake bottom CAVE DETECTION method comprises the steps:
Step 1: pour into water at the stake bottom (4) of stake holes (5), make a bottom (4) have the high water layer of 10~20cm (7), now sonar Detect probe (2) to be immersed in above-mentioned water layer (7);
Step 2: live main frame (1) is passed through communication cable (3) and sent sonar to the single-chip microcomputer (2.6) in sonar detection probe (2) Stress wave control instruction, single-chip microcomputer (2.6) sends to sonar stress wave drive module (2.1) according to sonar stress wave control instruction Sonar stress wave control signal, sonar stress wave drive module (2.1) controls sonar stress according to sonar stress wave control signal Wave launcher (2.3) transmission power scope to below stake bottom (4) is 1kw~7kw, and frequency range is the sound of 1000~10000hz Receive stress wave, each sonar stress wave receives the reflected signal that sensor (2.4) receives an above-mentioned sonar stress wave, each Sonar stress wave signal processing module (2.5) is amplified successively processing, filters to the reflected signal of corresponding sonar stress wave Process and analog-to-digital conversion process, obtain the reflected signal of the sonar stress wave after one group of process, sonar stress wave signal processes mould The reflected signal of the sonar stress wave after one group of process is sent to single-chip microcomputer (2.6), meanwhile, three-dimensional electronic compass by block (2.5) (2.2) sense that in sonar detection probe (2), each sonar stress wave receives sensor (2.4) direction now, thus obtaining One group of bearing data, and by this group direction data transfer to single-chip microcomputer (2.6);
Step 3: the reflected signal of the sonar stress wave after above-mentioned one group process is passed through communication cable (3) and passes by single-chip microcomputer (2.6) It is defeated by live main frame (1), above-mentioned sonar stress wave is received sensor (2.4) one group of direction now by single-chip microcomputer (2.6) simultaneously Data is transferred to live main frame (1) by communication cable (3);
Step 4: by sonar detection pop one's head in (2) rotate 20~30 degree, and repeat step 2 and step 3, make live main frame (1) Obtain the reflected signal of sonar stress wave after another group of process and all sonar stress waves receive sensor (2.4) after rotation Another group of bearing data, live main frame (1) utilize above-mentioned two groups process after the reflected signal of sonar stress wave and two groups of sound Stress wave of receiving receives the sonar reflection that sensor (2.4) bearing data obtains tested surface according to existing sonar stress wave imaging method Stress wave waveform profile;
Step 5: existing stess wave method analysis is carried out really to the sonar reflection stress wave wavy profile figure of above-mentioned tested surface Determine stake bottom (4) bottom part down 10m and solution cavity or soft rock mass be whether there is with inner region.
2. according to claim 1 bottom CAVE DETECTION method it is characterised in that: described scene main frame (1) include system Bus (1.1), central processing unit (1.2), memorizer (1.3), human-computer interaction device (1.4), usb communication interface (1.5), its In, described central processing unit (1.2), memorizer (1.3), human-computer interaction device (1.4), usb communication interface (1.5) are all and system Bus (1.1) connects.
3. according to claim 1 bottom CAVE DETECTION method it is characterised in that: it also includes being erected at stake holes (5) top The aperture support (6) in portion, described aperture support (6) holds up communication cable (3) in stake mouth.
4. according to claim 1 bottom CAVE DETECTION method it is characterised in that: described sonar stress wave receives sensor (2.4) and sonar stress wave signal processing module (2.5) all have multiple, each sonar stress wave receive sensor (2.4) all logical Cross the sonar signal input that corresponding sonar stress wave signal processing module (2.5) connects single-chip microcomputer (2.6), the plurality of sound Stress wave of receiving reception sensor (2.4) is evenly arranged along the circumference of sonar detection probe (2) bottom.
5. according to claim 1 bottom CAVE DETECTION method it is characterised in that: in described sonar detection probe (2) Sonar stress wave launcher (2.3), sonar stress wave receive sensor (2.4) and three-dimensional electronic compass (2.2) is each perpendicular to stake Bottom (4).
6. according to claim 1 bottom CAVE DETECTION method it is characterised in that: in described step 2, three-dimensional electronic compass (2.2) by sonar detection pop one's head in (2) now sonar detection probe inclination data be also transmitted to single-chip microcomputer (2.6);In step 3, Sonar detection probe inclination data is transferred to live main frame (1), live main frame (1) by communication cable (3) by single-chip microcomputer (2.6) Confirm whether sonar detection probe (2) now is vertical with stake bottom (4) according to sonar detection probe inclination data, if sonar is visited Probing head (2) is not vertical with stake bottom (4), need by sonar detection pop one's head in (2) be adjusted to vertical with stake bottom (4).
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