CN210439341U - Height detection device for bored pile - Google Patents
Height detection device for bored pile Download PDFInfo
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- CN210439341U CN210439341U CN201920711228.XU CN201920711228U CN210439341U CN 210439341 U CN210439341 U CN 210439341U CN 201920711228 U CN201920711228 U CN 201920711228U CN 210439341 U CN210439341 U CN 210439341U
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Abstract
The utility model discloses a drilling bored concrete pile height detection device, which comprises a frequency acquisition instrument, a tray, a pressure box and a sampling pipe; the upper surface and the lower surface of the tray are provided with raised circular grooves, wherein the upper circular groove is used for accommodating the pressure box, and the lower circular groove is used for connecting a sampling pipe; when the sampling pipe is used, the tray connected with the sampling pipe is placed in the drilled hole, the sampling pipe penetrates through the mud layer, and the sampling pipe stops after reaching the concrete layer; then, lifting the tray, resetting the leakage-stopping blade in the sampling pipe to close the pipe orifice, moving the sampling pipe out of the drill hole, judging the interface of the mixed layer and the concrete from a perspective window on the sampling pipe, and recording the thickness of the mixed layer; separating the sampling pipe from the tray, arranging the pressure box on the tray, then putting the tray down in the drill hole, collecting the frequency of the pressure box in real time, calculating the pressure of the slurry covered on the pressure box according to a formula, measuring the weight of the slurry to obtain the height of the pressure box from the hole opening, and subtracting the height from the total height of the drill hole and the thickness of the mixed layer to obtain the pouring height of the concrete.
Description
Technical Field
The utility model belongs to the technical field of the pile foundation detects, concretely relates to bored concrete pile height detection device.
Background
The cast-in-situ bored pile plays an important role in the aspects of guaranteeing the structural stability of engineering, guaranteeing the construction quality of an engineering foundation and the like, the concrete over-cast height detection is highly concerned by relevant professionals at home and abroad as the most effective measure for ensuring the pile body quality, and the accuracy of the detection method can directly influence the construction quality and progress of the engineering foundation.
At present, a heavy hammer detection method and a cone measuring disc method are adopted for measuring the pile top elevation of the cast-in-situ bored pile, the method is simple and convenient to operate, but has extremely high requirements on experience of operators and extremely inaccurate detection results, and the pile body quality of the cast-in-situ bored pile cannot be guaranteed because the weight and the compactness of concrete cannot meet the design requirements when the pile head is broken to the designed elevation; or the concrete is excessively poured to a large height, so that the concrete is seriously wasted, the material cost is increased, the personnel cost for breaking the pile head and the workload for breaking the pile head at the later stage are increased, and the construction progress is seriously influenced.
The traditional monitoring and detecting method has the defects of high labor cost, large error result, easy influence of external factors and the like, along with the development and the improvement of the level of the automation technology, more and more engineering technicians begin to combine the method with the engineering monitoring and detecting technology, such as a laser range finder, a full-automatic inclinometer, a vibration rotation type axial force meter, the popularization and the application of a vibration rotation type soil pressure box in deep foundation pit engineering and the like.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art not enough, provide a drilling bored concrete pile height detecting device.
The utility model discloses a realize through following technical scheme:
a device for detecting the height of a bored pile comprises a frequency acquisition instrument (1), a tray (2), a pressure box (3) and a sampling pipe (4); the upper surface and the lower surface of the tray (2) are provided with raised circular grooves, wherein the upper circular groove (2-1) is used for accommodating the pressure box (3), and the lower circular groove is used for connecting a sampling pipe (4); the sampling tube (4) consists of a tube head (4-1) and a tube body (4-2), the tube head (4-1) and the tube body (4-2) are connected through threads, a leakage stopping blade (4-3) is arranged in the tube head (4-1), a vent hole (4-5) is formed in the tube wall at the top of the tube body (4-2), and a perspective window (4-6) is axially arranged on the tube wall of the tube body (4-2).
In the technical scheme, the tray (2) is a steel disc, and the inner diameter of the upper circular groove (2-1) on the upper surface of the tray is equal to the outer diameter of the pressure box (3), so that the pressure box (3) can be firmly clamped.
In the technical scheme, the edge of the upper circular groove (2-1) of the tray (2) is provided with a notch (a), and a lead of the pressure box (3) can be led out from the notch.
In the technical scheme, the lower circular groove on the lower surface of the tray (2) is provided with an external thread, and can be in threaded connection with the upper port of the sampling pipe (4).
In the technical scheme, the edges of the trays (2) are provided with the threading holes at equal intervals on the circumference, the threading holes are used for binding the measuring ropes (5), the number of the threading holes is preferably more than or equal to 3, and the trays (2) can be prevented from overturning when being transferred.
In the technical scheme, the pressure box (3) is a steel string type pressure box, the self-vibration frequency of the pressure box changes correspondingly by utilizing different tension forces of steel strings, and the change of the pressure borne by the pressure box is obtained by measuring the change of the frequency of the steel strings.
In the technical scheme, the leakage stopping blades (4-3) are in a disc shape and are hinged on the inner wall of the tube head, flanges (4-4) are further arranged on the inner wall of the tube head, and the flanges (4-4) are used for preventing the leakage stopping blades (4-3) from rotating downwards, so that the core sample is prevented from sliding out of the sampling tube (4).
In the technical scheme, the upper port and the lower port of the sampling pipe (4) are both provided with internal threads, the internal threads of the upper port are used for being connected with the external threads of the lower circular groove of the tray (2), and the internal threads of the lower port are used for being connected with the external threads of the upper port of the pipe head (4-1).
In the technical scheme, the number of the vent holes (4-5) can be multiple, and the vent holes are used for exhausting gas in the tube and ensuring that the core sample enters the sampling tube (4).
In the technical scheme, the perspective window (4-6) is made of transparent plastic materials and is used for observing the boundary layer of the core sample in the pipe body (4-2), and the perspective window (4-6) is provided with scale marks.
The detection method of the bored pile height detection device comprises the following steps:
① assembling the sampling tube (4) and the tray (2), and binding the tray (2) with the measuring rope (5);
② the tray (2) connected with the sampling tube (4) is put down in the drill hole, the leak-stopping blade (4-3) is washed away by the mud when moving down, the sampling tube (4) drives the tray (2) to rapidly pass through the mud layer by the dead weight, when the tube head (4-1) passes through the mixed layer and contacts with the concrete layer, the sampling tube (4) stops moving down;
③ lifting the tray (2), the leak-stopping blade (4-3) resets after being stressed by the dead weight and the core sample in the tube body (4-2), and the orifice of the sampling tube (4) is closed;
④ moving the sampling tube (4) out of the hole, judging the interface of the mixed layer and the concrete from the perspective window (4-6), and recording the thickness of the mixed layer;
⑤ separating the sampling tube (4) from the tray (2), placing the pressure box (3) in the circular groove on the upper surface, and collecting the initial frequency f0 of the pressure box (3) by using the frequency collector (1);
⑥ the tray (2) is put down in the drill hole, because of the light dead weight, when the tray (2) reaches the surface of the mixed layer, the tray stops moving down, the concrete filled subsequently pushes the filled concrete to move up, the mixed layer is always on the uppermost layer;
⑦ real-time acquiring the frequency f1 of the pressure box (3);
⑧, calculating the pressure F of the overburden mud on the pressure box (3) in the pouring process according to the formula F-k (fi2-F02), wherein k is the soil pressure box rate coefficient;
⑨ the mud weight gamma is measured by volume-weight method, the height of the pressure box (2) from the hole opening (i.e. H is the height of mud) is calculated according to the formula H ═ F/gamma, and the height H subtracted from the total height of the drilled hole and the thickness of the mixed layer are the pouring height of the concrete.
The utility model discloses an advantage and beneficial effect do:
compared with the existing cast-in-place pile over-filling height detection technology, the utility model adopts the sampling pipe device to accurately judge the height of the mixed layer and effectively control the over-filling height of the concrete, thereby ensuring the pile body quality, avoiding the material waste caused by the over-filling height, and breaking a series of problems that the pile head increases the labor cost and the outward transportation cost, and the field construction is influenced; the utility model applies the frequency acquisition instrument and the pressure box to the field of concrete super-irrigation height detection, and realizes the detection of concrete super-irrigation height; the concrete filling in-process can detect the height of irritating of concrete in good time, does not have any influence to the construction progress, has greatly improved the construction progress, in addition, the utility model discloses simple structure, the cost is lower, and convenient operation has stronger practicality.
Drawings
Fig. 1 is a schematic structural diagram of a bored pile height detection device.
Fig. 2 is a sectional view taken along line a-a in fig. 1.
Fig. 3 is a schematic diagram of a space explosion structure of a sampling pipe.
Description of reference numerals: 1: frequency acquisition instrument, 2: tray, 3: pressure cell, 4: sampling pipe, 5: measuring rope, 2-1: upper circular groove, 4-1: tube head, 4-2: a pipe body, 4-3: leak-stopping blades, 4-4: flange, 4-5: vent hole, 4-6: a see-through window.
For a person skilled in the art, other relevant figures can be obtained from the above figures without inventive effort.
Detailed Description
In order to make the technical field person understand the solution of the present invention better, the technical solution of the present invention is further described below with reference to the specific embodiments.
Example one
Referring to the attached drawings, the device for detecting the height of the bored pile comprises a frequency acquisition instrument 1, a tray 2, a pressure box 3 and a sampling pipe 4.
The upper surface and the lower surface of the tray 2 are provided with raised circular grooves, wherein the upper circular groove 2-1 is used for accommodating the pressure box 3, and the lower circular groove is used for connecting the sampling tube 4; the sampling tube 4 consists of a tube head 4-1 and a tube body 4-2, the tube head 4-1 is connected with the tube body 4-2 through threads, a leakage-stopping blade 4-3 is arranged in the tube head 4-1, a vent hole 4-5 is arranged on the tube wall at the top of the tube body 4-2, and a perspective window 4-6 is axially arranged on the tube wall of the tube body 4-2.
When in use, the tray 2 connected with the sampling pipe 4 is placed in a drilled hole, and the sampling pipe 4 passes through the mud layer and stops after reaching the concrete layer; then, the tray 2 is lifted, the leakage-stopping blades 4-3 are reset to close the pipe orifice, the sampling pipe 4 is moved out of the drill hole, the interface of the mixed layer and the concrete is judged from the perspective window 4-6, and the thickness of the mixed layer is recorded. Separating the sampling pipe 4 from the tray 2, arranging the pressure box 3 on the tray 2, collecting the initial frequency f0 of the pressure box 3 by using the frequency collector 1, then lowering the tray 2 in a drill hole, collecting the frequency f1 of the pressure box 3 in real time, calculating the pressure of the overlying slurry on the pressure box 3 according to a formula, measuring the weight of the slurry, obtaining the height of the pressure box 3 from an orifice, and subtracting the thickness of a mixed layer to obtain the pouring height of concrete.
Further, the frequency acquisition instrument 1 is used for acquiring a frequency output signal of the vibrating wire type pressure cell 3.
Furthermore, the tray 2 is a steel disc, and the inner diameter of an upper circular groove 2-1 on the upper surface of the tray is equal to the outer diameter of the pressure box 3, so that the pressure box 3 can be firmly clamped; the edge of the upper circular groove 2-1 is provided with a notch a, and a lead of the pressure box 3 can be led out from the notch a; the lower circular groove on the lower surface of the tray 2 is provided with external threads which can be in threaded connection with the upper port of the sampling tube 4; 2 edges of tray are circumference equidistant and are equipped with through wires hole b, and through wires hole b is used for ligature survey rope 5, and the quantity in through wires hole is preferred to be greater than or equal to 3, can avoid toppling when tray 2 transfers.
Further, the pressure box 3 is a steel string type pressure box, the natural frequency of the pressure box changes correspondingly by using different tension (stress) of the steel string, and the change of the pressure borne by the pressure box is obtained by measuring the change of the frequency of the steel string.
Furthermore, the leakage-stopping blades 4-3 are in a disc shape and are hinged on the inner wall of the tube head, and flanges 4-4 are further arranged on the inner wall of the tube head, and the flanges 4-4 are used for preventing the leakage-stopping blades 4-3 from rotating downwards, so that the core sample is prevented from sliding out of the sampling tube 4.
Furthermore, the upper port and the lower port of the sampling tube 4 are both provided with internal threads, the internal threads of the upper port are used for being connected with the external threads of the lower circular groove of the tray 2, and the internal threads of the lower port are used for being connected with the external threads of the upper port of the tube head 4-1.
The following is a specific use method of the bored pile height detection device:
① assembling the sampling tube 4 and the tray 2, and binding the tray 2 with the measuring rope 5;
② the tray 2 connected with the sampling tube 4 is put down in the drill hole, the leak-stopping blade 4-3 is washed away by the mud when moving down, the sampling tube 4 drives the tray 2 to rapidly pass through the mud layer by the dead weight, when the tube head 4-1 passes through the mixed layer and contacts with the concrete layer, the sampling tube stops moving down;
③ lifting the tray 2, the leakage-stopping blade 4-3 is reset after being stressed by the dead weight and the pressure of the core sample in the tube body 4-2, and the opening of the sampling tube 4 is closed;
④ moving the sampling tube 4 out of the hole, judging the interface of the mixed layer and the concrete from the perspective window 4-6, and recording the thickness of the mixed layer;
⑤ separating the sampling tube 4 from the tray 2 while placing the pressure cell 3 in a circular groove on the upper surface and acquiring the initial frequency f0 of the pressure cell 3 with the frequency acquirer 1;
⑥ the tray 2 is lowered into the borehole, because of its light weight, when the tray 2 reaches the surface of the mixed layer, it stops moving downwards, the concrete filled subsequently will move upwards against the filled concrete, the mixed layer is always on the top layer;
⑦, acquiring the frequency f1 of the pressure box 3 in real time;
⑧, calculating the pressure F of the overlying mud applied to the pressure box 3 in the pouring process according to the formula F-k (fi2-F02), wherein k is the soil pressure box rate coefficient;
⑨ the mud weight gamma is measured by volume-weight method, the height of the pressure box (2) from the hole opening (i.e. H is the height of mud) is calculated according to the formula H ═ F/gamma, and the height H subtracted from the total height of the drilled hole and the thickness of the mixed layer are the pouring height of the concrete.
Example two
On the basis of the first embodiment, the transparent window 4-6 is made of transparent plastic and is used for observing the boundary layer of the core sample in the pipe body 4-2, and the transparent window 4-6 is provided with scale marks.
EXAMPLE III
On the basis of the first embodiment, furthermore, the number of the vent holes 4-5 can be multiple, and the vent holes are used for exhausting gas in the tube and ensuring that the core sample enters the sampling tube 4.
The invention has been described above by way of example, and it should be noted that any simple variants, modifications or other equivalent substitutions by a person skilled in the art without spending creative effort may fall within the scope of protection of the present invention without departing from the core of the present invention.
Claims (9)
1. The utility model provides a bored concrete pile height detection device which characterized in that: comprises a frequency acquisition instrument (1), a tray (2), a pressure box (3) and a sampling tube (4); the upper surface and the lower surface of the tray (2) are provided with raised circular grooves, wherein the upper circular groove (2-1) is used for accommodating the pressure box (3), and the lower circular groove is used for connecting a sampling pipe (4); the sampling tube (4) consists of a tube head (4-1) and a tube body (4-2), the tube head (4-1) and the tube body (4-2) are connected through threads, a leakage stopping blade (4-3) is arranged in the tube head (4-1), a vent hole (4-5) is formed in the tube wall at the top of the tube body (4-2), and a perspective window (4-6) is axially arranged on the tube wall of the tube body (4-2).
2. The bored pile height detection device according to claim 1, wherein: the edge of the upper circular groove (2-1) of the tray (2) is provided with a notch, and a lead of the pressure box (3) can be led out from the notch.
3. The bored pile height detection device according to claim 1, wherein: the lower circular groove of the lower surface of the tray (2) is provided with external threads, and can be in threaded connection with the upper port of the sampling pipe (4).
4. The bored pile height detection device according to claim 1, wherein: the edge of the tray (2) is provided with threading holes at equal intervals on the circumference, the threading holes are used for binding the measuring ropes (5), and the number of the threading holes is more than or equal to 3.
5. The bored pile height detection device according to claim 1, wherein: the pressure box (3) is a steel string type pressure box.
6. The bored pile height detection device according to claim 1, wherein: the leakage stopping blades (4-3) are in a disc shape and are hinged to the inner wall of the tube head, flanges (4-4) are further arranged on the inner wall of the tube head, and the flanges (4-4) are used for preventing the leakage stopping blades (4-3) from rotating downwards.
7. The bored pile height detection device according to claim 1, wherein: the upper port and the lower port of the sampling pipe (4) are both provided with internal threads, the internal threads of the upper port are used for being connected with the external threads of the lower circular groove of the tray (2), and the internal threads of the lower port are used for being connected with the external threads of the upper port of the pipe head (4-1).
8. The bored pile height detection device according to claim 1, wherein: the number of the vent holes (4-5) is plural.
9. The bored pile height detection device according to claim 1, wherein: the perspective window (4-6) is made of transparent plastic materials and is used for observing the boundary layer of the core sample in the pipe body (4-2), and the perspective window (4-6) is provided with scale marks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920711228.XU CN210439341U (en) | 2019-05-17 | 2019-05-17 | Height detection device for bored pile |
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| CN201920711228.XU CN210439341U (en) | 2019-05-17 | 2019-05-17 | Height detection device for bored pile |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110185071A (en) * | 2019-05-17 | 2019-08-30 | 中交天津港湾工程研究院有限公司 | Cast-in-situ bored pile height detecting device and its detection method |
| CN110241867A (en) * | 2019-05-29 | 2019-09-17 | 中交天津港湾工程研究院有限公司 | Cast-in-situ bored pile height detecting device and its detection method |
| CN114232585A (en) * | 2021-12-31 | 2022-03-25 | 苏州大学 | On-site installation method for keeping levelness of soil pressure cell |
-
2019
- 2019-05-17 CN CN201920711228.XU patent/CN210439341U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110185071A (en) * | 2019-05-17 | 2019-08-30 | 中交天津港湾工程研究院有限公司 | Cast-in-situ bored pile height detecting device and its detection method |
| CN110185071B (en) * | 2019-05-17 | 2024-08-23 | 中交天津港湾工程研究院有限公司 | Drilling bored concrete pile height detection device and detection method thereof |
| CN110241867A (en) * | 2019-05-29 | 2019-09-17 | 中交天津港湾工程研究院有限公司 | Cast-in-situ bored pile height detecting device and its detection method |
| CN114232585A (en) * | 2021-12-31 | 2022-03-25 | 苏州大学 | On-site installation method for keeping levelness of soil pressure cell |
| CN114232585B (en) * | 2021-12-31 | 2023-03-24 | 苏州大学 | On-site installation method for keeping levelness of soil pressure cell |
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