CN104631517A - Bored pile concrete interface monitoring device and method - Google Patents
Bored pile concrete interface monitoring device and method Download PDFInfo
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- CN104631517A CN104631517A CN201410833047.6A CN201410833047A CN104631517A CN 104631517 A CN104631517 A CN 104631517A CN 201410833047 A CN201410833047 A CN 201410833047A CN 104631517 A CN104631517 A CN 104631517A
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Abstract
The invention relates to a bored pile concrete interface monitoring device which is designed through an electrical impedance physical property testing method for media such as concrete, slurry and water in the bored pile underwater concrete pouring process and sensitivity test analysis and through researches on the testing method and instrument for an underwater electrical impedance testing probe and underwater concrete pouring elevation positioning. The bored pile concrete interface monitoring device comprises a ground host, a probe electronic cavity, a push rod arranged on the top of the probe electronic cavity, an insulation rod arranged at the bottom of the probe electronic cavity, a first electrode, a second electrode, a resistance value measuring module and an analog-digital converter, wherein the first electrode and the second electrode are fixedly connected to the insulation rod in a sleeving mode, and the resistance value measuring module and the analog-digital converter are arranged in the probe electronic cavity. According to the key technological principle, in the pouring process of a pouring hole, the electrical impedance of water and slurry is obviously different form that of the concrete, and the positioning of the concrete pouring interface (or depth) is achieved by measuring the difference.
Description
Technical field
The present invention relates to bored pile underwater gliders technical field in a kind of foundation construction engineering, refer to a kind of bored pile concrete interface monitoring device and method particularly.
Background technology
Flourish along with China's engineering construction cause, bored concrete pile foundation engineering extensively adopts in the major workss such as highrise building, bridge, port and pier, offshore production platform and nuclear power station, has become most important a kind of Foundation Design form in engineering construction.The extensive employing of bored concrete pile foundation engineering and the increase of the stake degree of depth, filling concrete amount is increased increasingly, according to relevant statistics, major part all engineerings below ± 0.00 in filling concrete use field, as Foundation Designs such as high-rise building basis, underground chamber, subterranean tunnel, bridge, harbour, harbours, all adopt underwater gliders on the basis of bridge, harbour, harbour and highrise building especially.In engineering reality, how to judge the interface of filling concrete, accurately determine the important engineering problem that the degree of depth of filling concrete becomes in the urgent need to address.
Due to the mixture that more than filling concrete face there is mud thus pour into a mould in the more difficult correct positioning control of true absolute altitude of concrete surface, the method of estimation is often adopted in engineering construction in the past, for ensureing the reliability of groundwater increment, often cause the increase of filling concrete amount.Especially obvious in the work progress of Tall Building Foundation bored pile, every pile often needs many perfusions 2 ~ 4m, cause the serious waste of concrete resource on the one hand, add the difficulty of foundation excavation simultaneously, add construction cost and the project construction cost of project on the other hand, and bring how to bury the problem of environmental pollution that process any excess concrete abandons block.If estimation is not enough, then causes filling concrete interface inadequate, affect Quality of Foundation.
How underwater gliders controls the underwater perfusion interface of concrete well, reaches the requirement at design perfusion interface, does not also have corresponding monitoring method at home, special monitoring instrument and equipment is not had yet, the method of employing estimation, accuracy extreme difference, wastes greatly or quality can not ensure; Special monitoring instrument or equipment is not had in the world yet.
Summary of the invention
Object of the present invention will provide a kind of bored pile concrete interface monitoring device and method exactly, by these apparatus and method, effectively can monitor and control the underwater perfusion interface of concrete in bored pile underwater gliders engineering, reach the requirement at engineering design perfusion interface.
For realizing this object, bored pile concrete interface monitoring device designed by the present invention, it is characterized in that: it comprises ground host machine, probe electronics chamber, be arranged on the push rod of probe electronics top of chamber, be arranged on the insulating rod bottom probe electronics chamber, fixedly sleeved the first electrode on insulating rod and the second electrode, be arranged on the resistance measurement module in probe electronics chamber and analog-digital converter, at a distance of the spacing preset between described first electrode and the second electrode, the wire of described first electrode and the second electrode is through two the resistance value test sides accessing resistance measurement module after the wire guide of described insulating rod, the signal output part of resistance measurement module connects the signal input part of described analog-digital converter, the signal output part of described analog-digital converter connects described ground host machine signal input part.
In technique scheme, described push rod is vertical with probe electronics chamber, and described insulating rod is vertical with probe electronics chamber.
In technique scheme, on the fixedly sleeved sidewall bottom insulating rod of described second electrode.
In technique scheme, the spacing range between described first electrode and the second electrode is 10 ~ 30cm.
In technique scheme, be also provided with amplifier and wave filter in described probe electronics chamber, the signal output part of described resistance measurement module is successively by the signal input part of amplifier and wave filter connection mode number converter.
In technique scheme, the signal output part of described analog-digital converter connects described ground host machine signal input part by test cable.
In technique scheme, the alarm signal output ends of described ground host machine is also connected with alarm.
Utilize a bored pile concrete interface monitoring method for right above-mentioned bored pile concrete interface monitoring device, it is characterized in that, it comprises the following steps:
Step 1: pour into concrete to be poured in Insulation test bucket, described first electrode and the second electrode are immersed in the concrete of Insulation test bucket, now resistance measurement module records concrete resistance value in described Insulation test bucket by the first electrode and the second electrode, and this resistance value is transferred in ground host machine shows, the resistance value of now ground host machine display is as judging whether the concrete of castinplace pile perfusion reaches the threshold resistance value of design perfusion target location;
Step 2: before castinplace pile concrete perfusion, is inserted described probe electronics chamber and described insulating rod in castinplace pile by push rod, and described first electrode on described insulating rod is positioned the filling concrete target location designed by castinplace pile concrete perfusion;
Step 3: start the described concrete poured in described castinplace pile in described step 1, filling concrete face in described castinplace pile constantly raises, the now resistance value of ground host machine display described in real-time monitored, when in 95% ~ 105% scope that real-time resistance value reaches the threshold resistance value determined in step 1, stop concrete perfusion, now described first electrode and described second electrode are immersed in the concrete in described castinplace pile completely, and the concrete of castinplace pile perfusion reaches perfusion target location.
In described step 3, when in 95 ~ 105% scopes that real-time resistance value reaches the threshold resistance value determined in step 1, reported to the police by alarm, make operating personnel stop concrete perfusion.
In described step 1, described Insulation test bucket is plastic testing bucket, pour in described plastic testing bucket 30cm dark treat concrete perfusion.
Key technology of the present invention be fill orifice in filling process, resistance and the concrete resistance of water, mud have obvious difference, realize the location of filling concrete interface (or degree of depth) by measuring this difference.
Beneficial effect of the present invention is:
(1) in Foundation Design bored pile underwater gliders process, adopt the present invention can the effective underwater perfusion position of monitor and forecast concrete, and reach the requirement at design perfusion interface, avoid the waste causing concrete resource, the construction cost of reduction project and project construction cost, and the problem of environmental pollution efficiently solving that any excess concrete abandons block.
(2) adopt the present invention concrete accurately can be filled into the perfusion position of design, avoid causing filling concrete do not reach design interface and affect Quality of Foundation.
(3) the present invention is also provided with alarm, when in 95% ~ 105% scope that the resistance value of ground host machine display reaches threshold resistance value, alarm device can send warning, can stop filling with stake, simple to operation, and in time, accurately.
(4) device of the present invention is simple to operation, is convenient for carrying; And volume is little, do not affect whole work progress; Can need and regulating pushing rod length according to the degree of depth of reality perfusion, applied range.
Accompanying drawing explanation
Fig. 1 is using state structural representation of the present invention;
Fig. 2 is structural representation of the present invention.
1-ground host machine, 2-probe electronics chamber, 2.1-impedance bioelectrical measurement module, 2.2-amplifier, 2.3-analog-digital converter, 2.4-wave filter, 3-test cable, 4-push rod, 5-castinplace pile, 6-insulating rod, the 7-the first electrode, the 7.1-the second electrode, 8-alarm.
Detailed description of the invention
Below in conjunction with attached Fig. 1 and 2 and specific embodiment, the present invention is described in further detail:
The present invention is mainly used in the monitoring of concrete interface in the filling process of the priming concrete pile hole in highrise building, bridge, port and pier, infrastructure engineering such as marine Bian oil platform and nuclear power station etc.
The present invention passes through the electrical impedance physical property measurement method of medium and the test analysis of sensitivity such as concrete, mud, water in bored pile underwater gliders process, the method of testing of electrical impedance test probe and underwater gliders absolute altitude location and the research of tester, propose drill-pouring pile underwater concrete absolute altitude interface detection method and have developed bored pile concrete interface monitoring device under water.The key technology principle of this device be fill orifice in filling process, electrical impedance and the concrete electrical impedance of water, mud have obvious difference, realize the location of filling concrete interface (or degree of depth) by measuring this difference.
Bored pile concrete interface monitoring device as illustrated in fig. 1 and 2, it comprises ground host machine 1, probe electronics chamber 2, be arranged on the push rod 4 at top, probe electronics chamber 2, be arranged on the insulating rod 6 bottom probe electronics chamber 2, fixedly sleeved the first electrode 7 and the second electrode 7.1 on insulating rod 6, be arranged on the resistance measurement module 2.1 in probe electronics chamber 2 and analog-digital converter 2.3, at a distance of the spacing preset between described first electrode 7 and the second electrode 7.1, the wire of described first electrode 7 and the second electrode 7.1 is through two the resistance value test sides accessing resistance measurement module 2.1 after the wire guide of described insulating rod 6, the signal output part of resistance measurement module 2.1 connects the signal input part of described analog-digital converter 2.3, the signal output part of described analog-digital converter 2.3 connects described ground host machine 1 signal input part.
In technique scheme, described push rod 4 is vertical with probe electronics chamber 2, and described insulating rod 6 is vertical with probe electronics chamber 2, and described push rod 4 is scalable push rod, and can need according to the degree of depth of reality perfusion and regulate described push rod 4 length, length range be 1 ~ 30 meter.
In technique scheme, on the fixedly sleeved sidewall bottom insulating rod 6 of described second electrode 7.1.
In technique scheme, the spacing range between described first electrode 7 and the second electrode 7.1 is 10 ~ 30cm, can overcome concrete inhomogeneities, make too greatly accuracy of detection reduce, and too little meeting makes detection data discrete comparatively large, increases the accuracy judged.
In technique scheme, be also provided with amplifier 2.2 and wave filter 2.4 in described probe electronics chamber 2, the signal output part of described resistance measurement module 2.1 passes through the signal input part of amplifier 2.2 and wave filter 2.4 connection mode number converter 2.3 successively.
In technique scheme, the signal output part of described analog-digital converter 2.3 connects described ground host machine 1 signal input part by test cable 3.
In technique scheme, the alarm signal output ends of described ground host machine 1 is also connected with alarm 8.
A kind of bored pile concrete interface monitoring method utilizing above-mentioned bored pile concrete interface monitoring device, the method determines interface or the depth location of concrete perfusion by the resistance variations measuring medium in priming concrete pile hole, according to concrete in underwater gliders process, the electrical impedance physical property of the media such as mud and the difference of sensitivity characteristic, adopt concrete in two electrode monitoring filling concrete processes of monitoring probe, the change of the electrical impedance of the media such as mud, when change reaches threshold value, ground host machine is just reported to the police, now illustrate that concrete reaches default interface location.
Concrete steps are:
Step 1: pour into concrete to be poured in Insulation test bucket, described first electrode 7 and the second electrode 7.1 are immersed in the concrete of Insulation test bucket, now resistance measurement module 2.1 records concrete resistance value in described Insulation test bucket by the first electrode 7 and the second electrode 7.1, and this resistance value is transferred in ground host machine 1 shows, now the resistance value that shows of ground host machine 1 is as judging whether concrete that castinplace pile 5 pours into reaches the threshold resistance value of design perfusion target location;
Step 2: before castinplace pile 5 concrete perfusion, described probe electronics chamber 2 and described insulating rod 6 are inserted in castinplace pile 5 by push rod 4, and described first electrode 7 on described insulating rod 6 is positioned the filling concrete target location designed by castinplace pile 5 concrete perfusion;
Step 3: start the described concrete poured in described castinplace pile 5 in described step 1, (monitor value now should be the resistance value of mud, it and threshold resistance value have certain difference) filling concrete face in described castinplace pile 5 constantly raises, the now resistance value of ground host machine 1 display described in real-time monitored, when in 95% ~ 105% scope that real-time resistance value reaches the threshold resistance value determined in step 1, stop concrete perfusion, now described first electrode 7 and described second electrode 7.1 are immersed in the concrete in described castinplace pile 5 completely, the concrete that castinplace pile 5 pours into reaches perfusion target location.
In described step 3, when in 95 ~ 105% scopes that real-time resistance value reaches the threshold resistance value determined in step 1, reported to the police by alarm, make operating personnel stop concrete perfusion.
In described step 1, described Insulation test bucket is plastic testing bucket, pour in described plastic testing bucket 30cm dark treat concrete perfusion.Plastic testing bucket can reduce the resistance value of test bucket to the interference of threshold resistance value, makes step 1 can obtain threshold resistance value accurately.
The content that this manual is not described in detail belongs to the known prior art of professional and technical personnel in the field.
Claims (10)
1. a bored pile concrete interface monitoring device, it is characterized in that: it comprises ground host machine (1), probe electronics chamber (2), be arranged on the push rod (4) at probe electronics chamber (2) top, be arranged on the insulating rod (6) of bottom, probe electronics chamber (2), fixedly sleeved the first electrode (7) on insulating rod (6) and the second electrode (7.1), be arranged on the resistance measurement module (2.1) in probe electronics chamber (2) and analog-digital converter (2.3), at a distance of the spacing preset between described first electrode (7) and the second electrode (7.1), described first electrode (7) and the second electrode (7.1) access two resistance value test sides of resistance measurement module (2.1) respectively by wire, the signal output part of resistance measurement module (2.1) connects the signal input part of described analog-digital converter (2.3), the signal output part of described analog-digital converter (2.3) connects described ground host machine (1) signal input part.
2. bored pile concrete interface monitoring device according to claim 1, it is characterized in that: described push rod (4) is vertical with probe electronics chamber (2), described insulating rod (6) is vertical with probe electronics chamber (2).
3. bored pile concrete interface monitoring device according to claim 1, is characterized in that: described second electrode (7.1) is fixedly sleeved on the sidewall of insulating rod (6) bottom.
4. bored pile concrete interface monitoring device according to claim 1, is characterized in that: the spacing range between described first electrode (7) and the second electrode (7.1) is 10 ~ 30cm.
5. bored pile concrete interface monitoring device according to claim 1, it is characterized in that: be also provided with amplifier (2.2) and wave filter (2.4) in described probe electronics chamber (2), the signal output part of described resistance measurement module (2.1) passes through the signal input part of amplifier (2.2) and wave filter (2.4) connection mode number converter (2.3) successively.
6. bored pile concrete interface monitoring device according to claim 1, is characterized in that: the signal output part of described analog-digital converter (2.3) connects described ground host machine (1) signal input part by test cable (3).
7. bored pile concrete interface monitoring device according to claim 1, is characterized in that: the alarm signal output ends of described ground host machine (1) is also connected with alarm (8).
8. utilize a bored pile concrete interface monitoring method for the bored pile concrete interface monitoring device described in claim 1, it is characterized in that, it comprises the following steps:
Step 1: pour into concrete to be poured in Insulation test bucket, described first electrode (7) and the second electrode (7.1) are immersed in the concrete of Insulation test bucket, now resistance measurement module (2.1) records concrete resistance value in described Insulation test bucket by the first electrode (7) and the second electrode (7.1), and this resistance value is transferred in ground host machine (1) shows, whether the resistance value that now ground host machine (1) shows reaches the threshold resistance value of design perfusion target location as the concrete that judgement castinplace pile (5) is poured into,
Step 2: before castinplace pile (5) concrete perfusion, described probe electronics chamber (2) and described insulating rod (6) are inserted in castinplace pile (5) by push rod (4), and described first electrode (7) on described insulating rod (6) is positioned the filling concrete target location designed by castinplace pile (5) concrete perfusion;
Step 3: start the described concrete in the described step 1 of perfusion in described castinplace pile (5), filling concrete face in described castinplace pile (5) constantly raises, the now resistance value that shows of ground host machine described in real-time monitored (1), when in 95% ~ 105% scope that real-time resistance value reaches the threshold resistance value determined in step 1, stop concrete perfusion, now described first electrode (7) and described second electrode (7.1) are immersed in the concrete in described castinplace pile (5) completely, the concrete that castinplace pile (5) pours into reaches perfusion target location.
9. bored pile concrete interface monitoring method according to claim 8, it is characterized in that: in described step 3, when in 95 ~ 105% scopes that real-time resistance value reaches the threshold resistance value determined in step 1, reported to the police by alarm, make operating personnel stop concrete perfusion.
10. bored pile concrete interface monitoring method according to claim 8, is characterized in that: in described step 1, and described Insulation test bucket is plastic testing bucket, pour in described plastic testing bucket 30cm dark treat concrete perfusion.
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| CN113818442A (en) * | 2021-08-17 | 2021-12-21 | 山东大学 | Sliding triggering type bored pile concrete pouring height control device and method |
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| CN113981977A (en) * | 2021-12-09 | 2022-01-28 | 中铁二十二局集团第四工程有限公司 | Pile top elevation control device for drilling and pouring pile foundation |
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| CN117091497B (en) * | 2023-10-16 | 2024-01-16 | 中铁大桥局集团有限公司 | Device and method for dynamically monitoring concrete slurry interface of bored pile |
| CN118516993A (en) * | 2024-07-17 | 2024-08-20 | 广东电白二建集团有限公司 | Intelligent concrete slurry filling construction method and system based on filling pile |
| CN118516993B (en) * | 2024-07-17 | 2024-10-01 | 广东电白二建集团有限公司 | Intelligent concrete slurry filling construction method and system based on filling pile |
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