CN104131584B - With continuous wall trench underground quality detection device and the method thereof of electronic compass - Google Patents
With continuous wall trench underground quality detection device and the method thereof of electronic compass Download PDFInfo
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- CN104131584B CN104131584B CN201410244920.8A CN201410244920A CN104131584B CN 104131584 B CN104131584 B CN 104131584B CN 201410244920 A CN201410244920 A CN 201410244920A CN 104131584 B CN104131584 B CN 104131584B
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Abstract
The invention discloses a kind of continuous wall trench underground quality detection device with electronic compass and method thereof, relate to construction work detection technique.This device comprises diaphragm wall, support, pulley, signal cable, main frame line; Displacement has electric winch and main frame, and is provided with underground probe; The grooving notch place of diaphragm wall is provided with support, support is provided with pulley; The low side of signal cable is connected with underground probe, and the high-end of signal cable is connected with electric winch through pulley; Electric winch is connected on main frame by main frame line.The present invention adopts mechanical contact, and more traditional sonic method is more direct, and therefore testing result is more accurate and reliable, is applicable to continuous wall trench underground quality examination.
Description
Technical field
The present invention relates to construction work detection technique, particularly relate to a kind of continuous wall trench underground quality detection device with electronic compass and method thereof.
Background technology
Diaphragm wall is in construction work, uses Special digging scouring machine tool, under the condition of mud off, has the groove section of certain length, width and the degree of depth, lay reinforcing cage, concrete perfusion at underground excavation; Then connect each groove section, form one underground reinforced concrete wall of continuous print.Its Main Function:
1. underground water is blocked, for construction in foundation ditch creates conditions;
2. surrounding soil lateral pressure is born;
3. use as body of wall function;
4. as a part for foundation, to bear upper load.
Current diaphragm wall has been widely used in all kinds of permanent constructions such as dam foundation antiseepage, shaft excavation, industrial premises jumbo basis, city underground, High-Rise Building Deep Foundation, railway and bridge engineering, dock, ship lock, harbour, buried tank, underground detritus tank.For ensureing the quality of diaphragm wall, first the groove section (also claiming continuous wall trench underground) of underground excavation should meet construction engineering quality requirement.Some local provinces and cities have formulated the technology for detection code of continuous wall trench underground quality, the testing requirement of mandatory provisions to continuous wall trench underground quality, as Jiangsu Province has promulgated " drilling pouring pile hole, continuous wall trench underground quality detection technology code " DGJ32/TJ117-2011.The detection of grooving groove width and grooving verticality should be carried out the detection of continuous wall trench underground quality before laying reinforcing cage, will table one be asked for an interview to its allowable variation.
Table one: Jiangsu Province's continuous wall trench underground quality detection technology code (DGJ32/TJ117 – 2011)
At present, sonic method is the comparatively normal detection method about continuous wall trench underground quality used.
As shown in Figure 1, its checkout gear includes diaphragm wall 10 (measurand), support 11, pulley 12, bearing steel wire 13, signal cable 14, sonic method electric winch 15, main frame line 16, sonic method main frame 17, sonic method underground probe 18 and sonic sensor 19;
Its position and annexation are:
Grooving is formed between diaphragm wall 10, the notch place of grooving is provided with support 11, support 11 is provided with pulley 12, the sonic method underground probe 18 being placed in grooving is connected with the lower end of two bearing steel wires 13, the upper end of two bearing steel wires 13 is connected with sonic method electric winch 15 through pulley 12, and sonic method electric winch 15, main frame line 16 are connected successively with sonic method main frame 17;
Sonic method underground probe 18 is provided with two sonic sensors 19, the acoustic signals detected by sonic sensor 19 is delivered in sonic method main frame 17 through main frame line 16.
Its operating principle is:
Acoustic signals launched by sonic sensor 19, its from propagate, then arrive grooving groove face, then the time reflecting back into sonic sensor 19 is exactly the time of advent of acoustic reflection signal; Acoustic reflection signal can differentiate in the acoustic signals of pickup, and its time of advent is as the time span in Fig. 2 represented by dotted line.
Usually be full of the muddy water containing mud in grooving, if the spread speed of known acoustic signals in muddy water is v, then sonic sensor 19 is to the distance d=v × t/2 of grooving groove face.Distance d under different depth position detected by two sonic sensors 19, can be plotted on curve as shown in Figure 3.Grooving groove width required by table one is these two sonic detection distance sums.
Fig. 3 draws out the medium line between two sonic detection distances, and carries out linear fit to it, the slope of the straight line obtained can represent the grooving verticality required by table one.
According to the requirement of table one, should carry out into the detection of groove depth, it is completed by the device for counting depth on electric winch 15.
The DM series borehole sidewall detector that the domestic comparatively normal instrument used is Japanese KODEN company.
But in actual applications, there is larger limitation in the Successful utilization of sonic method, this mainly because:
1. be full of mixed water in grooving, the many mud particles wherein suspended easily cause acoustic signals to produce the physical phenomenon such as scattering and diffusion, cause the decay of acoustic signals Propagation of Energy, thus acoustic reflection weak output signal;
2. acoustic signals reflects at grooving groove face place, and reflected intensity depends on the difference of the wave impedance (it equals the product of velocity of wave and Media density) of groove face place both sides medium; Difference is larger, reflects stronger.But because the medium on both sides is earth and mixed water respectively, it is so large that its wave impedance difference is far from expecting, thus acoustic reflection signal is strong, causes it not easy to identify;
3. aqueous medium viscosity is higher, makes when acoustic reflection signal is got back near sonic sensor 19, and the acoustic signals originally launched does not disappear completely; Like this, the synergistic effect of signal has flooded originally just fainter acoustic reflection signal;
4. the spread speed of sound wave in mixed aqueous medium should be slightly less than the spread speed in pure water, but the exact value of reality is not easily determined, this can affect the computational accuracy of Acoustic Wave Propagation distance.
5. such checkout equipment is heavy, not easily carries, and expensive.
Summary of the invention
The object of the invention is to the limitation overcoming prior art, a kind of continuous wall trench underground quality detection device with electronic compass and method thereof are provided.
The object of the present invention is achieved like this:
One, with the continuous wall trench underground quality detection device (abbreviation device) of electronic compass
This device comprises diaphragm wall (measurand), support, pulley, signal cable, main frame line;
Displacement has electric winch and main frame, and is provided with underground probe;
Its position and annexation are:
The grooving notch place of diaphragm wall is provided with support, support is provided with pulley;
The low side of signal cable is connected with underground probe, and the high-end of signal cable is connected with electric winch through pulley;
Electric winch is connected on main frame by main frame line.
Described underground probe includes main circuit board, side arm circuit board, cable plug, compression spring, interconnector, side arm turning cylinder, side arm locking disk, sealed cylindrical, side arm, linear electric motors, linear electric motors screw mandrel, polished rod and dynamic seal ring;
Its position and annexation are:
The cable plug of the lower end connecting downhole probe of signal cable;
Cable plug is arranged on the top of sealed cylindrical;
Main circuit board, interconnector, linear electric motors, linear electric motors screw mandrel and polished rod is provided with in sealed cylindrical; Be provided with dynamic seal ring in the bottom of sealed cylindrical, the polished rod be connected with linear electric motors screw mandrel can pass freely through this dynamic seal ring;
Cable plug, main circuit board, side arm circuit board and linear electric motors couple together by the interconnector of underground probe;
The surrounding of underground probe is provided with the side arm that four are in cross quadrature position;
Compression spring is arranged on the top of side arm, and its normal pressure applied can make side arm freely outwards open around side arm turning cylinder; Before detection starts, side arm is locked in side arm locking disk;
Linear electric motors drive linear electric motors screw mandrel to move up and down, and linear electric motors screw mandrel connects polished rod, and polished rod connects again side arm locking disk; When detecting beginning, linear electric motors drive side arm locking disk to move downward, and side arm finally can throw off side arm locking disk, and relies on the effect of compression spring outwards freely to open.
Two, with the continuous wall trench underground quality determining method (abbreviation method) of electronic compass
This method comprises the following steps:
1. first utilize the electronic compass in underground probe, detect the azimuth (before detection starts, confirming that four side arms are locked in side arm locking disk) under the geomagnetic field of continuous wall trench underground on the ground;
2. by electric winch, underground probe is put into continuous wall trench underground, understand underground probe depth location residing in grooving according to the device for counting depth in electric winch simultaneously;
3. by judging the degree of tightness of signal cable, whether confirmation underground probe arrives bottom grooving, and detects (required by table one) one-tenth groove depth by the device for counting depth in electric winch;
4. the linear electric motors in programme-control underground probe, to drive linear electric motors screw mandrel and polished rod to move downward, finally make four side arms throw off side arm locking disk and outwards freely open; Two pairs of side arms are in cross quadrature position, and therefore regardless of the azimuth of underground probe, a pair side arm at least having position relative contacts with grooving groove face;
5. programme-control electric winch lifting underground probe, under each depth location pre-set, is read by main frame and stores the open-angle of azimuth that electronic compass in underground probe detects and four side arms;
6. according to the bearing data of the grooving detected on the ground, and the bearing data of underground probe in grooving under each depth location and the open-angle data of side arm, ground main frame can calculate grooving groove width and verticality (and the result provided as shown in Figure 3, to meet the requirement of table one).
The present invention has following advantages and good effect:
1. accuracy of detection is high
The accuracy of detection of grooving groove width and verticality depends on the precision of the electronic compass be arranged in underground probe on main circuit board, and the precision of open-angle sensing chip on side arm circuit board.The azimuth detection range of electronic compass is 0 ° ~ 360 °, and its accuracy of detection can reach 1 °; And the detection range of open-angle sensing chip is 0 ° ~ 90 °, its accuracy of detection can reach 0.1 °; Under normal circumstances, whole equipment is without the need to demarcating;
2. testing process is efficient and convenient
Checkout gear is lightweight, and a dead lift is convenient, and operating process is simple; And the equipment that traditional sonic method uses is owing to adopting a signal cable and two bearing steel wires, make the structure of sonic method electric winch 15 more complicated, whole equipment is heavier, sometimes needs crane to coordinate, and could be placed into detection site.
In a word, the present invention adopts mechanical contact, and more traditional sonic method is more direct, and therefore testing result is more accurate and reliable, is applicable to continuous wall trench underground quality examination.
Accompanying drawing explanation
Fig. 1 is the structural representation utilizing sonic method to detect the checkout gear of continuous wall trench underground quality;
Fig. 2 is acoustic reflection signal schematic representation;
Fig. 3 is the curve map that sonic method detects continuous wall trench underground groove width and verticality;
Fig. 4 is the structural representation of this device;
Fig. 5 is the structural representation of underground probe;
Fig. 6 is main circuit board circuit theory diagrams;
Fig. 7 is side arm board circuit schematic diagram;
Fig. 8 is programme controlled workflow diagram;
Fig. 9 is that schematic diagram (top view) is detected at continuous wall trench underground azimuth;
Figure 10 .1 is one of continuous wall trench underground inner webs position view (top view);
Figure 10 .2 is two of continuous wall trench underground inner webs position view (top view);
Figure 11 is that side arm projector distance detects schematic diagram (lateral view);
Figure 12 is that side arm projector distance detects schematic diagram (top view);
Figure 13 is side arm end points movement locus schematic diagram (lateral view);
Figure 14 is continuous wall trench underground groove width and verticality result of calculation schematic diagram.
Wherein:
10-diaphragm wall; 11-support; 12-pulley;
13-bearing steel wire; 14-signal cable; 15-sonic method electric winch;
16-main frame line; 17-sonic method main frame; 18-sonic method underground probe;
19-sonic sensor.
20-electric winch; 21-main frame;
100-underground probe;
1A0-main circuit board;
1A1-communication signal socket;
1A2-serial converter;
1A3-ARM host scm;
1A4-electronic compass;
1A4A-main accelerometer; 1A4B-magnetoresistive transducer;
1A5-digital multi-channel switch;
1A6-side arm signal baseplug;
1B0-side arm circuit board;
1B1-side arm signal current tap socket;
1B2-ARM divides single-chip microcomputer;
1B3-side arm accelerometer.
101-cable plug; 102-compression spring; 103-interconnector;
104-side arm turning cylinder; 105-side arm locking disk; 106-sealed cylindrical;
107-side arm; 108-linear electric motors; 109-linear electric motors screw mandrel;
110-polished rod; 111-dynamic seal ring.
Detailed description of the invention
Below in conjunction with drawings and Examples to the detailed description of the invention:
One, device
1, overall
As Fig. 4, this device comprises diaphragm wall 10 (measurand), support 11, pulley 12, signal cable 14, main frame line 16;
Displacement has electric winch 20 and main frame 21, and is provided with underground probe 100;
Its position and annexation are:
The grooving notch place of diaphragm wall 10 is provided with support 11, support 11 is provided with pulley 12;
The low side of signal cable 14 is connected with underground probe 100, and the high-end of signal cable 14 is connected with electric winch 20 through pulley 12;
Electric winch 20 is connected on main frame 21 by main frame line 16.
2, functional part
1) electric winch 20
Electric winch 20 provides power to promote or decline underground probe 100; It is built-in with general AC motor, and can complete forward or reverse under program.
2) main frame 21
Main frame 21 is a kind of general secondary meters, and its internal construction consists predominantly of: general touch display liquid crystal display, general Industry Control computer and general communicating circuit plate.
Touch instruction or parameter that display liquid crystal display receives user's input, and can testing result be shown;
Industry Control computer runs independently developed application software and programme-control, comprises and controls testing process, process detection data, display or store testing result (seeing below explanation).
Communicating circuit plate completes the communication function with underground probe 100.
Main frame 21 carries out data communication by signal cable 14 and underground probe 100, and drives electric winch 20, to control the lifting of underground probe 100 in grooving; The azimuth of the underground probe 100 under each degree of depth of final entry and the open-angle of four side arms 107.
3) underground probe 100
As Fig. 5, described underground probe 100 includes main circuit board 1A0, side arm circuit board 1B0, cable plug 101, compression spring 102, interconnector 103, side arm turning cylinder 104, side arm locking disk 105, sealed cylindrical 106, side arm 107, linear electric motors 108, linear electric motors screw mandrel 109, polished rod 110 and dynamic seal ring 111;
Its position and annexation are:
The cable plug 101 of the lower end connecting downhole probe 100 of signal cable 14;
Cable plug 101 is arranged on the top of sealed cylindrical 106;
Main circuit board 1A0, interconnector 103, linear electric motors 108, linear electric motors screw mandrel 109 and polished rod 110 is provided with in sealed cylindrical 106; Be provided with dynamic seal ring 111 in the bottom of sealed cylindrical 106, the polished rod 110 be connected with linear electric motors screw mandrel 109 can pass freely through this dynamic seal ring 111;
Cable plug 101, main circuit board 1A0, side arm circuit board 1B0 and linear electric motors 108 couple together by the interconnector 103 of underground probe 100;
The surrounding of underground probe 100 is provided with the side arm 107 that four are in cross quadrature position;
Compression spring 102 is arranged on the top of side arm 107, and its normal pressure applied can make side arm 107 freely outwards open around side arm turning cylinder 104; Before detection starts, side arm 107 is locked in side arm locking disk 105;
Linear electric motors 108 drive linear electric motors screw mandrel 109 to move up and down, and linear electric motors screw mandrel 109 connects polished rod 110, and polished rod 110 connects again side arm locking disk 105; Like this when detecting beginning, linear electric motors 108 can drive side arm to lock disk 105 and move downward, and side arm 107 finally can throw off side arm locking disk 105, and relies on the effect of compression spring 102 outwards freely to open.
As known from the above, this device improves prior art, and signal cable 14 not only transmits detection signal, and the weight of carrying underground probe 100, therefore eliminates two bearing steel wires, simplify the structure of electric winch.
* main circuit board 1A0
As Fig. 6, main circuit board 1A0 includes communication signal socket 1A1, serial converter 1A2, ARM host scm 1A3, electronic compass 1A4, digital multi-channel switch 1A5 and side arm signal baseplug 1A6;
Electronic compass 1A4 includes main accelerometer 1A4A and magnetoresistive transducer 1A4B;
Communication signal socket 1A1 is connected with serial converter 1A2;
Side arm signal baseplug 1A6 is connected with digital multi-channel switch 1A5;
Serial converter 1A2, main accelerometer 1A4A, magnetoresistive transducer 1A4B, digital multi-channel switch 1A5 are connected with ARM host scm 1A3 respectively with side arm signal baseplug 1A6.
The operating principle of main circuit board 1A0:
Main accelerometer 1A4A will detect that angle of slope data are sent in ARM host scm 1A3 by SPI interface, and the magnetic resistance three-component detected is passed through I by magnetoresistive transducer 1A4B
2c interface is sent in ARM host scm 1A3; The last azimuth calculated by the general-purpose algorithm be stored in ARM host scm 1A3 under geomagnetic field;
ARM host scm 1A3 receives the open-angle data coming from four side arm circuit board 1B0 respectively by digital multi-channel switch 1A5;
Side arm circuit board 1B0 is connected to side arm signal baseplug 1A6 by interconnector 103;
ARM host scm 1A3 by serial converter 1A2, connecting communication signal plug 1A1, then is connected with cable plug 101 by interconnector 103, to complete the data communication of underground probe 100 and ground main frame 21.
The main devices of main circuit board 1A0:
* communication signal socket 1A1
Communication signal socket 1A1 selects general RS-422 interface.
* serial converter 1A2
Serial converter 1A2 selects the MAX3422 of MAXIM company, and its effect converts RS-232 serial ports (TXD, RXD) to RS-422 serial ports (A, B, Z, Y), so that Long line transmission.
* ARM host scm 1A3
ARM host scm 1A3 selects the LPC2114 series of Phillips.
The main accelerometer 1A4A of *
Main accelerometer 1A4A selects the ADIS16003 of AnalogDevices company, and it is connected with ARM host scm 1A3 by 4 holding wires MOSI, MISO, CLK, CS of SPI interface.
* magnetoresistive transducer 1AB
Magnetoresistive transducer 1AB selects the HMC5843 of Honeywell company, and it passes through I
22 holding wires SDA, SCL of C interface are connected with ARM host scm 1A3.
* digital multi-channel switch 1A5
Digital multi-channel switch 1A5 selects general 74LS151, and its address signal end (A0, A1, A2) is connected with the data I/O mouth (P10, P11, P12) of ARM host scm 1A3; The data output end Y of digital multi-channel switch 1A5 is connected with the RXDO end of ARM host scm 1A3; The data input pin (D0, D1, D2, D3) of digital multi-channel switch 1A5 is connected to side arm signal baseplug 1A6.
* side arm signal baseplug 1A6
Side arm signal baseplug 1A6 selects general purpose I C socket, and it connects the serial data line (TXD0, TXD1, TXD2, TXD3) coming from four side arm circuit board 1B0; Wherein, the PWM of side arm signal baseplug 1A6 is data transmission synchronization end, and it connects the pwm signal end of ARM host scm 1A3.
* side arm circuit board 1B0
As Fig. 6, side arm circuit board 1B0 divides single-chip microcomputer 1B2 and side arm accelerometer 1B3 to form by side arm signal current tap socket 1B1, ARM of connecting successively.
The operating principle of test arm circuit board 1B0:
Side arm accelerometer 1B3 is for detecting the open-angle of side arm 107, and testing result is sent to ARM by SPI interface (holding wire MOSI, MISO, CLK, CS) and divides in single-chip microcomputer 1B2;
ARM divides the serial ports output TXD of single-chip microcomputer 1B2 to be connected to the TXD of side arm signal current tap socket 1B1;
ARM divides the synchronizing signal end EINT of single-chip microcomputer 1B2 to be connected to the data transmission synchronization end PWM of side arm signal current tap socket 1B1.
The main devices of side arm circuit board 1B0:
* side arm signal current tap socket 1B1
Side arm signal current tap socket 1B1 selects general purpose I C socket; Its rs 232 serial interface signal output TXD is connected to the side arm signal baseplug 1A6 (in TXD1, TXD2, TXD3, TXD4) in main circuit board 1A0.
* ARM divides single-chip microcomputer 1B2
The LPC2114 series that ARM divides single-chip microcomputer 1B2 to select Phillips.
* side arm accelerometer 1B3
Side arm accelerometer 1B3 selects the ADIS16003 of AnalogDevice company, and it divides single-chip microcomputer 1B2 to be connected by 4 holding wires MOSI, MISO, CLK, CS of SPI interface with ARM.
* cable plug 101
Cable plug 101 is lower ends of a kind of general part, connection signal cable 14, and the upper end of signal cable 14 then connects ground electric winch 20 and main frame 21.
* compression spring 102
Four compression springs 102 are arranged on four side arms 107 respectively; Compression spring 102 provides normal pressure, side arm 107 outwards can be rotated around side arm turning cylinder 104, and can freely outwards open.
* interconnector 103
Interconnector 103 is for connecting main circuit board 1A0, the signal of telecommunication between four side arm circuit board 1B0 and cable plug 101.
* side arm turning cylinder 104
Side arm turning cylinder 104 is tie points of side arm 107 and sealed cylindrical 111; Test arm 107 can rotate around it.
* side arm locking disk 105
Side arm locking disk 105 is a kind of disks.
* sealed cylindrical 106
Sealed cylindrical 106 is main bodys of underground probe 100, adopts stainless steel material, can ensure that underground probe 100 100 meters under water (1MPa pressure) normally works.
* side arm 107
Contact with the groove face of grooving after side arm 107 opens, and along with the change of groove width, the open-angle of side arm 107 changes thereupon.
* linear electric motors 108
Linear electric motors 108 are a kind of universal products.
* linear electric motors screw mandrel 109
Linear electric motors screw mandrel 109 is a kind of spiral metal stocks.
* polished rod 110
Polished rod 110 is a kind of long metal bars.
* dynamic seal ring 111
Dynamic seal ring 111 is a kind of universal products.
Linear electric motors 108 connect linear electric motors screw mandrel 109 and polished rod 110; Polished rod 110 is connected to side arm locking disk 105 through dynamic seal ring 111; Under the driving of linear electric motors 108, side arm locking disk 105 can move up or down.
Two, method
As Fig. 8, described programme-control comprises the following step:
A, work start;
B, on the ground use " underground probe " detect the azimuth λ of grooving;
Whether C, hand inspection four " side arm ", in " side arm locking disk ", are enter step e, otherwise enter step D;
D, manually four " side arms " to be put into four " side arm locking disks ";
E, to transfer in grooving " underground probe ", and start depth counter counting;
Whether F, hand inspection " signal cable " relax, to confirm whether " underground probe " arrives the bottom of grooving; Be enter step G, otherwise jump to step e;
G, shown that by depth counter the degree of depth of grooving is D; It is S that setting " underground probe " promotes step pitch; Calculate the quantity of test point: N=D/S; Degree of depth array H (i) is set: sequence number i=1 ... N; When detecting beginning: i=N, and: H (N)=D;
H, programme-control " linear electric motors ", and moved downward by " linear electric motors screw mandrel " and " polished rod " drive " side arm locking disk ", until four " side arm " is thrown off completely and outwards freely opened, to be attached to the groove face of grooving;
I, under depth location H (i) record: the azimuthal angle beta (i) of " underground probe ", and the open-angle of four " side arms "
wherein j=1 ... 4;
J, according to side arm length L, the azimuth λ of grooving, the azimuthal angle beta (i) of " underground probe ", the open-angle of four " side arms "
calculate width W (i) and the verticality of the grooving under depth location H (i);
K, by step pitch S promote underground probe: sequence number i ﹤=i-1; Depth location H (i) ﹤=H (i)-S;
L, judge i≤0, be enter step M, otherwise jump to step I;
M, stopping promote " underground probe ";
N, drafting W (i) – H (i) (i=1 ... N) curve;
The verticality of O, calculating grooving;
P, end-of-job.
Three, operating principle
The present invention is that the side arm accelerometer 1B3 (open-angle sensing chip) that electronic compass 1A4 (including main accelerometer 1A4A and magnetoresistive transducer 1A4B) by installing on the main circuit board 1A0 of underground probe 100 and side arm circuit board 1B0 installs realizes.
According to the tilt angle information of the underground probe 100 that main accelerometer 1A4A records, and the geomagnetic field information that magnetoresistive transducer 1AB records, the azimuth under using general-purpose algorithm can calculate the geomagnetic field of underground probe 100.
The side arm accelerometer 1B3 that side arm circuit board 1B0 installs directly can provide the open-angle of side arm 107.
Specific works principle is as follows:
1, as Fig. 9 (top view), detect the azimuth λ of grooving first on the ground with underground probe 100, the reference azimuth of this angle is the direct north of geomagnetic field.Underground probe 100 has 4 side arms 107, when placing underground probe 100 on ground, wherein sequence number be 1 side arm 107 vertically should point to a face of grooving, obviously, the relative sequence number in position be 3 side arm 107 will vertically point to another face; Now, main frame 21 on the ground can read the azimuth λ of grooving;
2, according to the workflow shown in Fig. 8, grooving quality is detected.After underground probe 100 is placed into grooving, because signal cable 14 likely twists, cause underground probe 100 also to twist, thus its azimuth change; Therefore, this needs the azimuth detecting underground probe 100 under each depth location.After testing process terminates, can following data be obtained:
1) the azimuth λ of grooving;
2) degree of depth D of grooving;
3) under each depth location H (i), the azimuthal angle beta (i) of underground probe 100, the open-angle of four side arms 107
here, the sequence number i=1 of indicated depth position ... N, and N=D/S and H (N)=D, S represents the lifting step pitch of underground probe 100; Sequence number j=1 ... 4, indicate four side arms 107.
3, under each depth location, a pair side arm 107 that underground probe 100 always has at least position relative can contact with grooving groove face, namely occurs the one in Figure 10 .1 and two kinds of situations shown in Figure 10 .2 (top view).A pair side arm 107 only having position relative shown in Figure 10 .1 contacts with grooving groove face, and pair side arm of two shown in Figure 10 .2 107 all contacts with grooving groove face.Judge to belong to which kind of situation, only need know whether that the open-angle of a pair side arm 107 that position is relative reaches maximum.But, when carrying out grooving groove width and calculating, only need to choose arbitrarily that contact with groove face, that position is relative a pair side arm 107 and get final product (namely this does not reach maximum to the open-angle of side arm 107).
4, as Figure 11 (lateral view), assuming that the side arm 107 that sequence number is 1 and 3 is selected, its side arm length is all L, and its end points is respectively P1 and P3, and the vertical center line of underground probe 100 is C0; Under depth location H (i), if the open-angle of side arm 107 is respectively
with
can calculate L1 and L3, it is side arm 107 projector distance in the horizontal direction (or end points P1 and P3 is the horizontal range of C0 to vertical center line):
5, as Figure 12 (top view), O point is the central point of underground probe 100, and line segment cb and line segment uv points to the normal direction of grooving groove face; Under depth location H (i), above measured horizontal range L1 and L3 be the length of line segment oa and line segment ob respectively; Such L1 and L3 projector distance is in the normal direction respectively W1 (length of line segment ou) and W3 (length of line segment ov), can calculate:
W1＝L1*cos[β(i)–λ][3]
W3＝L3*cos[β(i)–λ][4]
As seen from Figure 11: if
with
unequal, W1 and W3 sum, not on same horizon, like this, can not be considered as the grooving groove width under depth location H (i) by end points P1 and P3 of side arm 107 simply.
6, set up plane coordinate system (X-Y) by Figure 13 (lateral view), X represents horizontal range here, and Y represents depth location.The vertical center line of underground probe 100 is C0, its line correspondence X=X0 (X0 can be given as arbitrary value in advance); Depth location H (i) refers to initial point O on underground probe 100 (intersection point of straight line Y=H (i) and straight line X=X0) relative to the vertical distance bottom grooving; The coordinate of such side arm end points P1 (X, Y) and P3 (X, Y) is:
When underground probe 100 is by when upwards promoting bottom grooving, side arm 107 end points along the movement locus of depth direction as shown in black circle in Figure 13.
7, the black circle data occurred in Figure 13 are further processed.First Quadratic Spline Interpolation is carried out to two groups of end points movement locus of side arm 107, obtain spline curve C1 as shown in figure 14 and C3, and suppose that its function expression is respectively X=f1 (Y) and X=f3 (Y); Like this, the grooving groove width required by table one can be provided by following formula (Y represents any depth location):
W(Y)＝f3(Y)-f1(Y)[7]
As shown in figure 14, the center line curve of spline curve C1 and C3 is C5, its expression formula:
0.5*[f3(Y)+f1(Y)][8]
Linear fit is carried out to center line curve C 5, can linear equation be obtained:
X＝AY+B[9]
Or,
Y＝(1/A)*X-B[10]
Parameter 1/A in above formula is the verticality of the grooving required by table one.
Claims (5)
1., with a continuous wall trench underground quality detection device for electronic compass, comprise diaphragm wall (10), support (11), pulley (12), signal cable (14) and main frame line (16);
It is characterized in that:
Displacement has electric winch (20) and main frame (21), and is provided with underground probe (100);
Its position and annexation are:
The grooving notch place of diaphragm wall (10) is provided with support (11), support (11) is provided with pulley (12);
The low side of signal cable (14) is connected with underground probe (100), and the high-end of signal cable (14) is connected with electric winch (20) through pulley (12);
Electric winch (20) is connected on main frame (21) by main frame line (16);
Described underground probe (100) includes main circuit board (1A0), side arm circuit board (1B0), cable plug (101), compression spring (102), interconnector (103), side arm turning cylinder (104), side arm locking disk (105), sealed cylindrical (106), side arm (107), linear electric motors (108), linear electric motors screw mandrel (109), polished rod (110) and dynamic seal ring (111);
Its position and annexation are:
The cable plug (101) of lower end connecting downhole probe (100) of signal cable (14);
Cable plug (101) is arranged on the top of sealed cylindrical (106);
Main circuit board (1A0), interconnector (103), linear electric motors (108), linear electric motors screw mandrel (109) and polished rod (110) is provided with in sealed cylindrical (106); Be provided with dynamic seal ring (111) in the bottom of sealed cylindrical (106), the polished rod (110) be connected with linear electric motors screw mandrel (109) can pass freely through this dynamic seal ring (111);
Cable plug (101), main circuit board (1A0), side arm circuit board (1B0) and linear electric motors (108) couple together by the interconnector (103) of underground probe (100);
The surrounding of underground probe (100) is provided with the side arm (107) that four are in cross quadrature position;
Compression spring (102) is arranged on the top of side arm (107), and its normal pressure applied can make side arm (27) freely outwards open around side arm turning cylinder (104); Before detection starts, side arm (107) is locked in side arm locking disk (105);
Linear electric motors (108) drive linear electric motors screw mandrel (109) to move up and down, and linear electric motors screw mandrel (109) connects polished rod (110), polished rod (110) connects again side arm locking disk (105); When detecting beginning, linear electric motors (108) drive side arm locking disk (105) to move downward, side arm (107) finally can throw off side arm locking disk (105), and relies on the effect of compression spring (102) outwards freely to open.
2., by continuous wall trench underground quality detection device according to claim 1, it is characterized in that:
Described main circuit board (1A0) includes communication signal socket (1A1), serial converter (1A2), ARM host scm (1A3), electronic compass (1A4), digital multi-channel switch (1A5) and side arm signal baseplug (1A6);
Electronic compass (1A4) includes main accelerometer (1A4A) and magnetoresistive transducer (1A4B);
Communication signal socket (1A1) is connected with serial converter (1A2);
Side arm signal baseplug (1A6) is connected with digital multi-channel switch (1A5);
Serial converter (1A2), main accelerometer (1A4A), magnetoresistive transducer (1A4B), digital multi-channel switch (1A5) are connected with ARM host scm (1A3) respectively with side arm signal baseplug (1A6).
3., by continuous wall trench underground quality detection device according to claim 1, it is characterized in that:
Described side arm circuit board (1B0) divides single-chip microcomputer (1B2) and side arm accelerometer (1B3) to form by the side arm signal current tap socket (1B1) connected successively, ARM.
4. utilize the continuous wall trench underground quality detection device described in claim 1 to carry out the method detected, it is characterized in that comprising the following steps:
1. first utilize the electronic compass in underground probe, detect the azimuth under the geomagnetic field of continuous wall trench underground on the ground;
2. by electric winch, underground probe is put into continuous wall trench underground, understand underground probe depth location residing in grooving according to the device for counting depth in electric winch simultaneously;
3. by judging the degree of tightness of signal cable, confirming whether underground probe arrives bottom grooving, and detecting into groove depth by the device for counting depth in electric winch;
4. the linear electric motors in programme-control underground probe, to drive linear electric motors screw mandrel and polished rod to move downward, finally make four side arms throw off side arm locking disk and outwards freely open; Two pairs of side arms are in cross quadrature position, and therefore regardless of the azimuth of underground probe, a pair side arm at least having position relative contacts with grooving groove face;
5. programme-control electric winch lifting underground probe, under each depth location pre-set, is read by main frame and stores the open-angle of azimuth that electronic compass in underground probe detects and four side arms;
6. according to the bearing data of grooving detected on the ground, and the bearing data of underground probe in grooving under each depth location and the open-angle data of side arm, ground main frame can calculate grooving groove width and verticality.
5. carry out the method detected by continuous wall trench underground quality detection device according to claim 4, it is characterized in that described programme-control is:
A, work start;
B, on the ground use " underground probe " detect the azimuth λ of grooving;
Whether C, hand inspection four " side arm ", in " side arm locking disk ", are enter step e, otherwise enter step D;
D, manually four " side arms " to be put into four " side arm locking disks ";
E, to transfer in grooving " underground probe ", and start depth counter counting;
Whether F, hand inspection " signal cable " relax, to confirm whether " underground probe " arrives the bottom of grooving; Be enter step G, otherwise jump to step e;
G, shown that by depth counter the degree of depth of grooving is D; It is S that setting " underground probe " promotes step pitch; Calculate the quantity of test point: N=D/S; Degree of depth array H (i) is set: sequence number i=1 ... N; When detecting beginning: i=N, and: H (N)=D;
H, programme-control " linear electric motors ", and moved downward by " linear electric motors screw mandrel " and " polished rod " drive " side arm locking disk ", until four " side arm " is thrown off completely and outwards freely opened, to be attached to the groove face of grooving;
I, under depth location H (i) record: the azimuthal angle beta (i) of " underground probe ", and the open-angle of four " side arms "
(ji), wherein j=1 ... 4;
J, according to side arm length L, the azimuth λ of grooving, the azimuthal angle beta (i) of " underground probe ", the open-angle of four " side arms "
(ji) width W (i) and the verticality of the grooving under depth location H (i), is calculated;
K, by step pitch S promote underground probe: sequence number i ﹤=i-1; Depth location H (i) ﹤=H (i)-S;
L, judge i≤0, be enter step M, otherwise jump to step I;
M, stopping promote " underground probe ";
N, drafting W (i) – H (i) (i=1 ... N) curve;
The verticality of O, calculating grooving;
P, end-of-job.
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| CN104963680B (en) * | 2015-06-23 | 2017-08-25 | 武汉中岩科技有限公司 | A kind of control method and device of pore-forming grooving detection |
| CN106482706A (en) * | 2015-08-24 | 2017-03-08 | 中国华冶科工集团有限公司 | A kind of shaft section area digital measuring device and method |
| CN112359884B (en) * | 2020-10-28 | 2022-01-18 | 武汉中岩科技股份有限公司 | Ultrasonic grooving detection probe device and detection method thereof |
| CN112281938B (en) * | 2020-11-23 | 2022-04-15 | 湖州菱创科技有限公司 | Pouring amount measuring device for cast-in-place pile and using method thereof |
| CN115198783B (en) * | 2022-07-08 | 2023-09-08 | 中交第二航务工程局有限公司 | Construction control method of compartment type ground continuous wall anchorage foundation |
| CN115506422A (en) * | 2022-08-23 | 2022-12-23 | 中交二航局第四工程有限公司 | Contact type grooving detection equipment and method suitable for grooving detection of diaphragm wall |
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