CN107288161B - Device and method for automatically detecting concrete over-filling of cast-in-place pile - Google Patents
Device and method for automatically detecting concrete over-filling of cast-in-place pile Download PDFInfo
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- CN107288161B CN107288161B CN201710522743.9A CN201710522743A CN107288161B CN 107288161 B CN107288161 B CN 107288161B CN 201710522743 A CN201710522743 A CN 201710522743A CN 107288161 B CN107288161 B CN 107288161B
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- electrical impedance
- mechanical seal
- impedance detection
- seal box
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/10—Miscellaneous comprising sensor means
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- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention belongs to the technical field of building pile foundation engineering, and discloses a device and a method for automatically detecting concrete over-grouting for a cast-in-place pile; the technical scheme is as follows: a mechanical seal box is respectively arranged on an upper top plate and a lower top plate of a cylindrical screen cylinder, a stepping motor and a laser displacement sensor are arranged on a base in the mechanical seal box, a torque limiter is sleeved on a moving bearing of the stepping motor, one end of a ball screw is connected with the torque limiter, the other end of the ball screw is fixed in a sleeve of the mechanical seal box, the middle of a sliding block with a baffle is sleeved on the ball screw through a nut seat, two threaded ports are arranged on a sliding trolley, two driving rods are arranged on the sliding trolley, hollow steel pipes are welded on two sides of the mechanical seal box, data wires of an electrical impedance cathode end, an electrical impedance anode end, the stepping motor and the laser displacement sensor are led out to be connected with a numerical control device to control the movement of the electrical impedance cathode end, the electrical impedance anode end, the stepping motor and the laser displacement sensor, displacement data are observed, whether concrete pouring is poured to a designated elevation is judged, and the purpose of preventing over pouring is achieved.
Description
Technical Field
The invention discloses a device and a method for automatically detecting concrete over-grouting for a cast-in-place pile, and belongs to the technical field of pile foundation engineering in the field of buildings.
Background
In the pile foundation engineering, the pore diameter of the cast-in-place pile is changed by various factors such as hole collapse and the like, so that whether the cast-in-place pile reaches a preset elevation volume part or not can not be accurately calculated through the volume of the cast-in-place concrete. In conventional construction, a worker hangs a 1kg measuring hammer by using a measuring rope, hits broken stones and calculates the concrete pouring elevation by using hand feeling, but the concrete top surface has thicker slurry, the grain diameter of commercial concrete broken stones is obviously reduced compared with the prior art, the difficulty of sensing quantity by hands and determining whether the concrete is poured to the preset elevation is obviously increased compared with the prior art, and the deeper the concrete pile top is, the longer the hollow hole is, the larger the measuring error is, and the better the control is, the more than 2 m-5 m the over-pouring is. After the foundation pit is excavated, the height of the pile body columns in the pit is different and is in a stone forest shape, the concrete waste amount caused by over-irrigation is quite remarkable, and the loss is huge. In the past, extensive and rapidly developing infrastructure often made such waste invisible, but now with the intense competition and environmental protection requirements, the problem is increasingly emphasized and needs to be solved urgently.
Disclosure of Invention
The invention overcomes the defects of the prior art, provides a device and a method for automatically detecting concrete over-filling for a filling pile, solves the over-filling problem in the engineering field, and can effectively control the filling elevation of a pile body.
In order to solve the technical problems, the invention adopts the technical scheme that: a device capable of automatically detecting concrete over-filling for a cast-in-place pile comprises a cylindrical sieve drum, an upper mechanical seal box, a lower mechanical seal box, an electrical impedance detection anode head and an electrical impedance detection cathode head, wherein the upper mechanical seal box and the lower mechanical seal box are respectively and fixedly arranged at the upper end and the lower end of the cylindrical sieve drum;
the structure of the driving device is as follows: including step motor, ball screw, torque limiter, slider and laser displacement sensor, step motor and laser displacement sensor are all fixed to be set up in upper and lower mechanical seal case, the bottom side, step motor's output is connected with ball screw through torque limiter, the slider suit is at ball screw, the slider is used for reflecting the laser that laser displacement sensor launched, the actuating lever is connected with the slider to with slider synchronous motion.
The supporting rod is a steel pipe and is used for inserting signal lines of an electrical impedance detection anode head and an electrical impedance detection cathode head, a U-shaped pipe is inserted into the top of the supporting rod, two ends of the U-shaped pipe are respectively inserted into the supporting rod correspondingly, a vertical pipe is vertically arranged in the middle of a transverse pipe of the U-shaped pipe and is used for guiding the signal lines of the electrical impedance detection anode head and the electrical impedance detection cathode head.
A guide rod is arranged between the stepping motor and the cylindrical screen drum and penetrates through the sliding block to be used for guiding the sliding block.
The invention relates to a method for a device for automatically detecting concrete over-filling for a filling pile, which is implemented by the following steps of setting a resistance value of a torque limiter, a volume ratio of crushed stones of a cylindrical screen drum corresponding to the displacement of a laser displacement sensor and resistance values of an electrical impedance detection anode head and an electrical impedance detection cathode head in concrete in advance: according to engineering requirements, selecting a supporting rod or a plurality of sections of supporting rods with required length to splice, assembling the supporting rods with the U-shaped pipe, and placing the whole device at the designed elevation of the cast-in-place pile through the supporting rods;
the second step is that: the data line and the electric wire are connected with the numerical control equipment on the ground through the hollow support rod and the U-shaped pipe;
the third step: controlling the upper pressing plate and the lower pressing plate to move to initial positions, namely, attaching the upper pressing plate and the lower pressing plate to the upper fixing plate and the lower fixing plate of the cylindrical screen drum;
the fourth step: pouring construction of the cast-in-place pile is started, and when the floating slurry or the floating slurry concrete mixed medium contacts the electrical impedance detection anode head and the electrical impedance detection cathode head, the upper mechanical seal box, the lower mechanical seal box and the driving device do not work; when the concrete medium completely wraps the electrical impedance detection anode head and the electrical impedance detection cathode head, the mechanical device starts to work, the upper pressing plate and the lower pressing plate move in the same direction, and meanwhile, the laser displacement sensor transmits the obtained data to the numerical control equipment according to the displacement condition of the sliding block;
the fifth step: after a set resistance value is reached, the torque limiter works, the upper pressing plate and the lower pressing plate stop moving, the displacement transmitted by the laser displacement sensor is analyzed, and after a set value of the volume rate of broken stones is reached, pouring construction of the cast-in-place pile can be stopped;
and a sixth step: after the measurement is finished, the volume rate and the resistance value of the crushed stones set in advance are combined, and finally the fact that the concrete pouring reaches the specified elevation is determined.
Compared with the prior art, the invention has the following beneficial effects.
1. The invention is provided with the electrical impedance cathode end and the electrical impedance anode end, realizes the measurement of the electrical impedance value of the contact medium in the cast-in-place pile by the equipment, provides a working signal for a mechanical transmission device, realizes the electromechanical integration and realizes the automatic control.
2. According to the invention, the upper and lower independent mechanical seal boxes are adopted, so that the disassembly, the overhaul or the replacement are convenient, the external thread is arranged at the outlet of the three-way connecting buckle, the actual required length of the steel pipe can be continuously connected according to the requirement, the device is not connected with the heavy steel pipe, the use and the carrying are convenient, and the application range is wide.
3. The stepping motor is provided with the torque limiter, and when the pressure plate exceeds a set resistance value, the stepping motor only drives the torque limiter to rotate and does not drive the ball screw to rotate, so that idling is realized, the pressure plate is ensured to stop moving, and the safety, reliability and low manufacturing cost of the motor are also protected.
4. The moving trolley is provided with the baffle, the displacement is measured by the laser displacement sensor, the displacement is calculated without the rotation parameters of the stepping motor, the invalid displacement is also avoided being calculated under the condition of motor idling, the precision is high, and the data is reliable.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a schematic view of the present invention.
Fig. 2 is a cross-sectional view of the present invention.
In the figure: the device comprises a cylindrical screen cylinder 1, an upper mechanical seal box 2, a lower mechanical seal box 3, an electrical impedance detection anode head 4, an electrical impedance detection cathode head 5, a support rod 6, a driving device 7, a stepping motor 71, a ball screw 72, a torque limiter 73, a slide block 74, a laser displacement sensor 75, a driving rod 8, an upper pressure plate 9, a lower pressure plate 10, a U-shaped tube 11 and a guide rod 12.
Detailed Description
As shown in fig. 1 and 2, the device capable of automatically detecting concrete over-filling for a cast-in-place pile of the present invention includes a cylindrical sieve cylinder 1, an upper mechanical seal box 2, a lower mechanical seal box 3, an electrical impedance detection anode head 4 and an electrical impedance detection cathode head 5, wherein the upper mechanical seal box 2 and the lower mechanical seal box 3 are respectively and fixedly disposed at the upper end and the lower end of the cylindrical sieve cylinder 1, support rods 6 are disposed at both sides of the upper mechanical seal box 2, the lower ends of the support rods 6 are fixedly disposed at the upper end of the cylindrical sieve cylinder 1, the lower portions of the two support rods 6 are respectively provided with the electrical impedance detection anode head 4 and the electrical impedance detection cathode head 5, driving devices 7 are disposed inside the upper mechanical seal box 2 and the lower mechanical seal box 3, the two driving devices 7 are respectively connected with an upper pressing plate 9 and a lower pressing plate 10 disposed inside the cylindrical sieve cylinder 1 through driving rods 8, and the upper pressing plate 9 and the lower pressing plate 10 are driven by the driving devices 7 to move in opposite directions and opposite directions in the cylindrical sieve cylinder 1;
the structure of the driving device 7 is as follows: the laser displacement detection device comprises a stepping motor 71, a ball screw 72, a torque limiter 73, a slider 74 and a laser displacement sensor 75, wherein the stepping motor 71 and the laser displacement sensor 75 are fixedly arranged at the bottom sides in an upper mechanical seal box 2 and a lower mechanical seal box 3, the output end of the stepping motor 71 is connected with the ball screw 72 through the torque limiter 73, the slider 74 is sleeved on the ball screw 72, the slider 74 is used for reflecting laser emitted by the laser displacement sensor 75, and the driving rod 8 is connected with the slider 74 and moves synchronously with the slider 74.
The support rod 6 is a steel pipe and is used for inserting signal lines of the electrical impedance detection anode head 4 and the electrical impedance detection cathode head 5, the U-shaped pipe 11 is inserted into the top of the support rod 6, two ends of the U-shaped pipe 11 are respectively inserted into the support rod 6 correspondingly, and a vertical pipe is vertically arranged in the middle of the horizontal pipe of the U-shaped pipe 11 and is used for guiding the signal lines of the electrical impedance detection anode head 4 and the electrical impedance detection cathode head 5.
A guide rod 12 is arranged between the stepping motor 71 and the cylindrical screen drum 1, and the guide rod 12 penetrates through the sliding block 74 and is used for guiding the sliding block 74.
The invention relates to a method for a device for automatically detecting concrete over-filling for a filling pile, which is implemented by the following steps of setting a resistance value of a torque limiter 73, a crushed stone volume rate of a cylindrical screen cylinder 1 corresponding to the displacement of a laser displacement sensor 75, and a resistance value of an electrical impedance detection anode head 4 and an electrical impedance detection cathode head 5 in concrete in advance: according to the engineering requirement, selecting a supporting rod 6 with the required length or a plurality of sections of supporting rods 6 to splice, assembling the supporting rods with the U-shaped pipe 11, and placing the whole device at the designed elevation of the cast-in-place pile through the supporting rods 6;
the second step is that: a data line and an electric wire are connected with a numerical control device on the ground through a hollow supporting rod 6 and a U-shaped pipe 11;
the third step: controlling the upper pressing plate 9 and the lower pressing plate 10 to move to initial positions, namely, attaching the upper pressing plate and the lower pressing plate to the upper fixing plate and the lower fixing plate of the cylindrical screen cylinder 1;
the fourth step: pouring construction of the cast-in-place pile is started, and when the floating slurry or the floating slurry concrete mixed medium contacts the electrical impedance detection anode head 4 and the electrical impedance detection cathode head 5, the driving devices 7 of the upper mechanical seal box 2 and the lower mechanical seal box 3 do not work; when the concrete medium completely wraps the electrical impedance detection anode head 4 and the electrical impedance detection cathode head 5, the mechanical device 7 starts to work, the upper pressing plate 9 and the lower pressing plate 10 move in the same direction, and meanwhile, the laser displacement sensor 75 transmits obtained data to the numerical control equipment according to the displacement condition of the sliding block 74;
the fifth step: after a set resistance value is reached, the torque limiter 73 works, the upper pressing plate 9 and the lower pressing plate 10 stop moving, the displacement transmitted by the laser displacement sensor 75 is analyzed, and after a set value of the volume rate of broken stones is reached, pouring construction of the cast-in-place pile can be stopped;
and a sixth step: after the measurement is finished, the volume rate and the resistance value of the crushed stones set in advance are combined, and finally the fact that the concrete pouring reaches the specified elevation is determined.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (4)
1. The utility model provides a device that ability automated inspection concrete super irritates for bored concrete pile which characterized in that: the device comprises a cylindrical screen drum (1), an upper mechanical seal box (2), a lower mechanical seal box (3), an electrical impedance detection anode head (4) and an electrical impedance detection cathode head (5), wherein the upper mechanical seal box (2) and the lower mechanical seal box (3) are fixedly arranged at the upper end and the lower end of the cylindrical screen drum (1) respectively, support rods (6) are arranged on two sides of the upper mechanical seal box (2), the lower ends of the support rods (6) are fixedly arranged at the upper end of the cylindrical screen drum (1), the lower parts of the two support rods (6) are respectively provided with the electrical impedance detection anode head (4) and the electrical impedance detection cathode head (5), driving devices (7) are arranged in the upper mechanical seal box (2) and the lower mechanical seal box (3), the two driving devices (7) are connected with an upper pressing plate (9) and a lower pressing plate (10) which are positioned in the cylindrical screen drum (1) correspondingly through driving rods (8), and the upper pressing plate (9) and the lower pressing plate (10) are driven to move in opposite directions in the cylindrical screen drum (1) through the driving devices (7);
the structure of the driving device (7) is as follows: including step motor (71), ball screw (72), torque limiter (73), slider (74) and laser displacement sensor (75), step motor (71) and laser displacement sensor (75) are all fixed to be set up the bottom side in upper and lower mechanical seal case (2), (3), the output of step motor (71) is connected with ball screw (72) through torque limiter (73), slider (74) suit is at ball screw (72), slider (74) is used for the laser of reflection laser displacement sensor (75) transmission, actuating lever (8) are connected with slider (74) to with slider (74) simultaneous movement.
2. The apparatus for automatically detecting concrete over-grouting pile according to claim 1, wherein: the supporting rod (6) is a steel pipe and is used for inserting signal lines of the electrical impedance detection anode head (4) and the electrical impedance detection cathode head (5), the supporting rod (6) is provided with a U-shaped pipe (11) in an inserting mode at the top, the two ends of the U-shaped pipe (11) are correspondingly inserted into the supporting rod (6) respectively, and a vertical pipe is vertically arranged in the middle of the horizontal pipe of the U-shaped pipe (11) and is used for guiding the signal lines of the electrical impedance detection anode head (4) and the electrical impedance detection cathode head (5).
3. The device for automatically detecting concrete over-filling for cast-in-place piles according to claim 1, wherein: be provided with guide bar (12) between step motor (71) and cylinder sieve section of thick bamboo (1), guide bar (12) run through slider (74) and set up for slider (74) direction.
4. A method for an apparatus for automatically detecting concrete over-grouting for a bored concrete pile according to claim 1, wherein: the method comprises the following steps of setting a resistance value of a torque limiter (73), a crushed stone volume rate of a cylindrical screen drum (1) corresponding to the displacement of a laser displacement sensor (75), and resistance values of an electrical impedance detection anode head (4) and an electrical impedance detection cathode head (5) in concrete in advance, and then implementing the following steps: according to engineering requirements, selecting a supporting rod (6) with a required length or a plurality of sections of supporting rods (6) to splice, assembling the supporting rods with the U-shaped pipe (11), and placing the whole device at the designed elevation of the cast-in-place pile through the supporting rods (6);
the second step: the data line and the electric wire are connected with the numerical control equipment on the ground through the hollow support rod (6) and the U-shaped pipe (11);
the third step: controlling the upper pressing plate (9) and the lower pressing plate (10) to move to initial positions, namely, the upper pressing plate and the lower pressing plate are attached to the upper fixing plate and the lower fixing plate of the cylindrical screen drum (1);
the fourth step: pouring construction of the cast-in-place pile is started, and when the floating slurry or the floating slurry concrete mixed medium contacts the electrical impedance detection anode head (4) and the electrical impedance detection cathode head (5), the driving devices (7) of the upper mechanical seal box (2) and the lower mechanical seal box (3) do not work; when the concrete medium completely wraps the electrical impedance detection anode head (4) and the electrical impedance detection cathode head (5), the mechanical device (7) starts to work, the upper pressing plate (9) and the lower pressing plate (10) move in the same direction, and meanwhile, the laser displacement sensor (75) transmits obtained data to the numerical control equipment according to the displacement condition of the sliding block (74);
the fifth step: after a set resistance value is reached, the torque limiter (73) works, the upper pressing plate (9) and the lower pressing plate (10) stop moving, the displacement transmitted by the laser displacement sensor (75) is analyzed, and pouring construction of the cast-in-place pile can be stopped after a set value of the volume ratio of broken stones is reached;
and a sixth step: after the measurement is finished, the volume rate and the resistance value of the crushed stones set in advance are combined, and finally the fact that the concrete pouring reaches the specified elevation is determined.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710522743.9A CN107288161B (en) | 2017-06-30 | 2017-06-30 | Device and method for automatically detecting concrete over-filling of cast-in-place pile |
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| CN201710522743.9A CN107288161B (en) | 2017-06-30 | 2017-06-30 | Device and method for automatically detecting concrete over-filling of cast-in-place pile |
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| CN107288161B true CN107288161B (en) | 2022-11-01 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108589703B (en) * | 2018-07-26 | 2023-08-04 | 大成科创基础建设股份有限公司 | Anti-overcharging device for filling pile |
| CN110273440B (en) * | 2019-06-03 | 2021-02-09 | 中北大学 | Cast-in-place pile over-irrigation monitoring system and method |
| CN112127364B (en) * | 2020-10-14 | 2022-12-20 | 广州市市政集团有限公司 | Pile head over-filling monitoring device for cast-in-place pile |
| CN113386264A (en) * | 2021-07-19 | 2021-09-14 | 湖北四通专用汽车有限公司 | Tunnel concrete tank truck tank body structure |
| 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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