CN103726516A - High-precision cast-in-place pile pore diameter detection technology - Google Patents
High-precision cast-in-place pile pore diameter detection technology Download PDFInfo
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- CN103726516A CN103726516A CN201210381968.4A CN201210381968A CN103726516A CN 103726516 A CN103726516 A CN 103726516A CN 201210381968 A CN201210381968 A CN 201210381968A CN 103726516 A CN103726516 A CN 103726516A
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- mechanical arms
- sealing drum
- place pile
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Abstract
The invention relates to a high-precision cast-in-place pile pore diameter detection technology which is applied to building foundation engineering. The detection technology is achieved through a sealing drum, a linear sliding potential sensor, umbrella-shaped mechanical arms, and the like. The umbrella-shaped mechanical arms automatically open and close under the action of inner springs and outer force. The umbrella-shaped mechanical arms are four in number, evenly distributed in four directions around the sealing drum, fixed on the sealing drum and connected with the linear sliding potential sensor in the sealing drum through a pressure equalizer. The inner springs are arranged at the fixing positions of the four mechanical arms and the sealing drum. The inner springs exert force to enable the mechanical arms to open to make contact with cast-in-place pile hole walls and track changes of the diameters of cast-in-place pile holes in the directions of the four mechanical arms. The changes of the diameters of the cast-in-place pile holes enable the mechanical arms to open and close, so that the measuring potential of the linear sliding potential sensor which is arranged in the sealing drum and connected with the mechanical arms changes. Through measurement of the changes, a high-precision cast-in-place pile hole diameter value can be obtained through calculation. The basic structure can be seen in abstract attached drawings.
Description
Affiliated technical field
The present invention relates to the detection technique in castinplace pile aperture in a kind of Foundation Design, the aperture high accuracy that is mainly used in realizing the priming concrete pile hole in the large foundation engineerings such as highrise building, bridge, port and pier and nuclear power station detects.
Background technology
Flourish along with China's engineering construction cause, bored concrete pile foundation extensively adopts in the major workss such as highrise building, bridge, heavy factory building, port and pier and nuclear power station, has become most important a kind of Foundation Design form in engineering construction.The quality of pile foundation engineering is directly connected to the safety of whole engineering construction.Pile foundation is conventionally underground or under water, and construction sequence complexity, technical requirements is high, difficulty of construction is large, easily occurs quality problems, and therefore the quality examination of pile foundation engineering is extremely important.The initial form of this pile foundation is construction priming concrete pile hole.One of most important quality requirement of priming concrete pile hole is whether aperture reaches designing requirement.
The Main Means of the detection in stake aperture, hole is that the mode that adopts mechanical arm to stretch is measured aperture now, is driven the variation of slide potentiometer by the stretching, extension of mechanical arm, measures slide potentiometer resistance variations formal output magnitude of voltage and gets final product calculated hole diameters.Concrete scheme is: castinplace pile aperture instrument front end has four mechanical arms, mechanical arm under the effect of contained spring and external force, automatically to open and to close up, and just as an automatic umbrella, mechanical arm adopts beveled structure.Apertometer is put into a Kong Zhonghou, mechanical arm naturally opens and contacts with stake hole wall with certain pressure, aperture becomes greatly mechanical arm open-angle and also becomes large, aperture dwindles hole wall compressing mechanical arm and draws in, the open-angle of mechanical arm diminishes, article four, mechanical arm composition is measured respectively the aperture value of two orthogonal directions, is averaged the aperture as measuring point.When stake hole apertometer is promoted to aperture at the bottom of hole, along with the variation in aperture, mechanical arm can be measured an aperture for hole different depth just as a ruler.
From the detection method in existing stake aperture, hole, can find out, the key that affects accuracy of detection is slide potentiometer.And the slide potentiometer adopting is at present copper wire-wound resistor, by the contact point of contact and copper cash position, moves and cause the variation of measuring potential value.The Measurement Resolution of this mode and precision determine by the diameter of copper cash, and copper wire diameter is large, and resolution ratio is low, and certainty of measurement is low; Copper wire diameter is little, and resolution ratio improves, but very easily damages; Its certainty of measurement is subject to the restriction of copper wire diameter, can only reach ± 15mm of measure error.
Summary of the invention
In order to overcome the accuracy of detection of detection method in existing stake aperture, hole be subject to the sliding problem of copper wirewound potential meter restriction, the present invention proposes a kind of stake hole Pore Diameter Detection technology that adopts linear slide potentiometric sensor, this detection technique has high-resolution, high-precision feature, makes castinplace pile aperture detect can reach ± 5mm of measure error.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further described.
Accompanying drawing 1 is structure principle chart of the present invention.
In Fig. 1:
1. interface---be connected with demonstration, control appliance;
2. sealing drum---instrument electronic circuit cavity, built-in sliding linear slide potentiometric sensor and measuring circuit;
3. measure leg turning joint;
4. pressure compensator;
5. measure leg;
6. hole diameter calibration device.
Accompanying drawing 2 is technology realization figure of the present invention.
In Fig. 2:
7. be, 8., 9., 10. linear slide potentiometric sensor, the slip of contact can cause the variation of measuring current potential linearly, can carry out voltage measurement, and its value is Δ V1, Δ V2, Δ V3, Δ V4.
for high precision constant current power supply.
The specific embodiment
(1) 1. snap joint be used for connecting the cable of going into the well, and whole instruments weight is all born by the cable of going into the well, and power supply, transmission data and measuring command are provided.
(2) sealing drum is equipped with measuring mechanism, directional survey module and electronic circuit in 2., 4. the pressure compensator of its lower end adopts oil resistant rubber to make, and 2. connect with sealing drum, wherein fill with transformer oil, instrument is when down-hole, though measurement leg understands enlargement and contraction but because external and internal pressure remains balance, mud can not invaded in sealing drum, guarantees normal operation of sensor.
(3) 5. instrument has four measurement legs of measuring hole diameter sizes, and box in bond tightens up at ordinary times, when instrument is gone into the well, constraint box is sunk to out to leg box bottom, measures leg and is opened leg box and retrain, and in the time of at the bottom of arrival hole, can be opened.
(4) 7., 8., 9., 10. four linear slide potentiometric sensors can detect caliper logging leg and change at two orthogonal directions, calculate the actual change amount of aperture value after amplifier amplifies.
(5) special manufacturing process has guaranteed hole diameter D and the linear functional relation of measuring-signal Δ V.
(6) aperture design formulas: D=D
0+ Δ V K
0
In formula, D
0-initial aperture (constant);
K
0-instrumental constant, is drawn by demarcation;
ΔV＝ΔV
1+ΔV
2+ΔV
3+ΔV
4。
Claims (2)
1. a high accuracy castinplace pile aperture detection technique, the stretching, extension of four umbrella shape mechanical arms and the variation of drawing the interior slide potentiometer contact position being connected with umbrella shape mechanical arm of drive sealing drum in, stretching, extension and the gathering of this variation reflection umbrella shape mechanical arm, carry out the detection of castinplace pile aperture, it is characterized in that: be connected with umbrella shape mechanical arm in sealing drum slide potentiometer adopt linear slide potentiometric sensor, realize the detection of high accuracy castinplace pile aperture.
2. according to claim 1 hole diameter detecting instrument, is characterized in that adopting the one or more and extensible linear slide potentiometric sensor being connected with the umbrella shape mechanical arm drawing in, realizes high accuracy castinplace pile aperture detect by the variation of contact position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210381968.4A CN103726516A (en) | 2012-10-10 | 2012-10-10 | High-precision cast-in-place pile pore diameter detection technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210381968.4A CN103726516A (en) | 2012-10-10 | 2012-10-10 | High-precision cast-in-place pile pore diameter detection technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103726516A true CN103726516A (en) | 2014-04-16 |
Family
ID=50450787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210381968.4A Pending CN103726516A (en) | 2012-10-10 | 2012-10-10 | High-precision cast-in-place pile pore diameter detection technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103726516A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104746539A (en) * | 2015-03-31 | 2015-07-01 | 王春龙 | Disc diameter detector |
| CN105672374A (en) * | 2016-03-23 | 2016-06-15 | 东华理工大学 | Grouting pile hole wall karst cave detector and detection method thereof |
| CN117704922A (en) * | 2024-02-01 | 2024-03-15 | 山东鼎晟装饰工程有限公司 | Pile hole aperture detection device for building engineering construction |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11133004A (en) * | 1997-10-31 | 1999-05-21 | Tokyo Soil Reserch:Kk | Method and device for evaluating soundness of underground concrete structure such as cast-ins-place concrete pile |
| JP2000291768A (en) * | 1999-04-02 | 2000-10-20 | Mitsuba Corp | Actuator |
| CN2737947Y (en) * | 2004-06-07 | 2005-11-02 | 上海昌吉地质仪器有限公司 | Pile hole diameter detecting instrument |
| CN1831492A (en) * | 2005-03-10 | 2006-09-13 | 上海昌吉地质仪器有限公司 | Underwater concrete pouring level position indicator |
| CN202031113U (en) * | 2011-04-23 | 2011-11-09 | 金文洪 | Five-dimensional digital detection system for cast-in-place pile hole |
-
2012
- 2012-10-10 CN CN201210381968.4A patent/CN103726516A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11133004A (en) * | 1997-10-31 | 1999-05-21 | Tokyo Soil Reserch:Kk | Method and device for evaluating soundness of underground concrete structure such as cast-ins-place concrete pile |
| JP2000291768A (en) * | 1999-04-02 | 2000-10-20 | Mitsuba Corp | Actuator |
| CN2737947Y (en) * | 2004-06-07 | 2005-11-02 | 上海昌吉地质仪器有限公司 | Pile hole diameter detecting instrument |
| CN1831492A (en) * | 2005-03-10 | 2006-09-13 | 上海昌吉地质仪器有限公司 | Underwater concrete pouring level position indicator |
| CN202031113U (en) * | 2011-04-23 | 2011-11-09 | 金文洪 | Five-dimensional digital detection system for cast-in-place pile hole |
Non-Patent Citations (1)
| Title |
|---|
| 何峰: "精密动态测量精度检测技术研究", 《中国优秀硕士学位论文全文数据库》, 23 April 2008 (2008-04-23), pages 2 - 11 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104746539A (en) * | 2015-03-31 | 2015-07-01 | 王春龙 | Disc diameter detector |
| CN105672374A (en) * | 2016-03-23 | 2016-06-15 | 东华理工大学 | Grouting pile hole wall karst cave detector and detection method thereof |
| CN117704922A (en) * | 2024-02-01 | 2024-03-15 | 山东鼎晟装饰工程有限公司 | Pile hole aperture detection device for building engineering construction |
| CN117704922B (en) * | 2024-02-01 | 2024-04-26 | 山东鼎晟装饰工程有限公司 | Pile hole aperture detection device for building engineering construction |
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Application publication date: 20140416 |