CN214530829U - Device for measuring pile tip displacement - Google Patents
Device for measuring pile tip displacement Download PDFInfo
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- CN214530829U CN214530829U CN202120614096.6U CN202120614096U CN214530829U CN 214530829 U CN214530829 U CN 214530829U CN 202120614096 U CN202120614096 U CN 202120614096U CN 214530829 U CN214530829 U CN 214530829U
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 55
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 21
- 230000000903 blocking effect Effects 0.000 claims abstract description 3
- 230000009471 action Effects 0.000 claims description 9
- 239000000463 material Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 11
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000002265 prevention Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The utility model provides a measure device of stake end displacement, include: the sounding pipe is embedded in the foundation pile, two reducer pipes which are symmetrical about the axis of the sounding pipe are arranged close to the bottom of the sounding pipe, and the reducer pipes are used for blocking the measuring device; the displacement meter is connected to a cross beam, and the cross beam is arranged above the sound measuring tube; measuring device, it arranges in the acoustic survey intraductal, includes from last locating plate, magnet and the guide arm that connects gradually extremely down, wear to establish the wire on the locating plate, the end of wire is worn and is wound on the displacement meter, the slider that can follow its upper and lower slip is established to the cover on the guide arm, two card arms of terminal swing joint of guide arm, card arm and slider swing joint, the slider is made by armature, drive slider rebound behind the magnet circular telegram, slider rebound drives the card arm shrink. The device provided by the utility model simple structure, the preparation is convenient, and the material source is extensive, and used repeatedly many times, and the suitability is good, the facilitate promotion.
Description
Technical Field
The utility model relates to a building pile basis field, concretely relates to measure device of stake end displacement.
Background
With the increasing investment of infrastructure, high-rise buildings and oversized bridges are more and more, and pile foundations are more and more widely used. The pile foundation is a foundation for transmitting earth surface load to deep stratum and utilizing side friction of soil body and end bearing force of pile end to bear earth surface load. The pile foundation can generate settlement in the pile forming process and the using process, and the necessity and the importance of pile foundation settlement observation are more obvious in order to ensure the normal service life of the pile foundation and the safety of buildings and provide reliable data and corresponding settlement parameters for future investigation and design construction.
The pile tip displacement data can be used for evaluating the resistance exertion condition of the pile tip holding layer end, calculating the pile body compression amount and estimating the exertion condition of the pile side friction resistance.
The traditional method for measuring the pile end settlement is to obtain the pile end settlement by observing the pile top settlement and subtracting the pile body compression amount. The pile body compression is obtained through theoretical calculation and has certain errors, so the pile end measuring method is not accurate.
The existing specified measurement method is a method adopting a displacement rod, but the method is not suitable for measuring the displacement of the pile end of a long pile, and the displacement rod is easy to deform in the pile. At present, measuring personnel adopt a mode of sectional displacement rods, specifically, a method of arranging displacement rods every 20m is adopted to measure the displacement of a pile end, but the method has a plurality of displacement rods and a plurality of sections of displacement rods, and the error of a measuring system is large.
Patent 200710022420X discloses a suspension measurement method and device for internal displacement of pile body, which uses a flexible method to measure displacement, but needs to set a slot at a specific position, so that when measuring the pile end, the slot may be filled with grout and cannot be used. Patent 2016209553033 discloses a pile tip displacement measuring device, specifically discloses that the displacement of pile tip can be measured by using displacement wires and hooks, and the pile tip displacement of 50m pile length can be measured, but the controllability of the hooks during recovery is not good.
Therefore, it is very important to develop a pile tip measuring device that is accurate, recyclable, controllable, and low in cost.
Disclosure of Invention
In order to overcome the influence of pile body compressive capacity when surveing the stake end and subsiding, the utility model provides a measure device of stake end displacement.
The utility model provides a measure device of stake end displacement, include:
the sounding pipe is embedded in the foundation pile, two reducer pipes which are symmetrical about the axis of the sounding pipe are arranged close to the bottom of the sounding pipe, and the reducer pipes are used for blocking the measuring device;
the displacement meter is connected to a cross beam, and the cross beam is arranged above the sound measuring tube;
measuring device, it arranges in the acoustic survey intraductal, includes from last locating plate, magnet and the guide arm that connects gradually extremely down, wear to establish the wire on the locating plate, the end of wire is worn and is wound on the displacement meter, the slider that can follow its upper and lower slip is established to the cover on the guide arm, two card arms of terminal swing joint of guide arm, card arm and slider swing joint, the slider is made by armature, drive slider rebound behind the magnet circular telegram, slider rebound drives the card arm shrink.
Furthermore, the reducing pipes are fixedly connected to the inner wall of the sounding pipe, the distance between the two reducing pipes is smaller than the diameter of the positioning plate, and the distance between the two reducing pipes is smaller than the maximum distance between the two clamping arms.
Further, the upper end of the reducing pipe is provided with an arc part, and the clamping arm can move downwards along the arc part.
Furthermore, the tail end of each clamping arm is fixedly connected with a clamping arm counterweight, and the two clamping arms are in an open state in a natural state under the action of the clamping arm counterweights.
Furthermore, the guide rod is provided with a falling prevention piece, the falling prevention piece is positioned below the sliding block, and the sliding block is blocked when moving downwards to the falling prevention piece.
Furthermore, a connecting rod is arranged between each clamping arm and the sliding block, one end of each connecting rod is hinged to the corresponding clamping arm, and the other end of each connecting rod is hinged to the corresponding sliding block.
Furthermore, the tail end of the lead is connected with a ground surface counterweight, and the mass of the ground surface counterweight is greater than the sum of the masses of the measuring device, the sliding block and the clamping arm.
Compared with the prior art, the utility model has the advantages of it is following:
(1) the device provided by the utility model has simple structure, convenient manufacture, wide material source, repeated use, good applicability and convenient popularization;
(2) the device provided by the utility model can directly observe the displacement settlement of the pile end, and avoid the influence of the self compression of the pile body on the observation of the displacement of the pile end;
(3) the utility model provides a device has avoided the great shortcoming of error when traditional displacement pole measures the long pile, and the controllability is better.
Drawings
Fig. 1 is a schematic structural view of a device for measuring pile tip displacement according to the present invention;
fig. 2 is a schematic structural view of a clamp arm and a positioning plate of a device for measuring pile tip displacement according to the present invention;
fig. 3 is a schematic view of the positioning of the clamp arm of a device for measuring pile tip displacement according to the present invention;
fig. 4 is a schematic view of the clip arm recovery of a device for measuring pile tip displacement according to the present invention;
fig. 5 is a top view of a reducer pipe of a device for measuring pile tip displacement according to the present invention;
fig. 6 is a side view of a reducer pipe of a device for measuring pile tip displacement according to the present invention.
In the figure: 1-sound measuring tube, 2-displacement meter, 3-measuring device, 31-positioning plate, 32-magnet, 33-guide rod, 34-lead, 35-slide block, 36-falling prevention piece, 37-clamping arm, 38-connecting rod, 39-clamping arm balance weight, 4-cross beam, 5-reference beam, 6-diameter-changing tube, 61-arc part and 7-earth surface balance weight.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be further described below with reference to the accompanying drawings.
Referring to fig. 1, 2, 3 and 4, an embodiment of the present invention provides a device for measuring pile tip displacement, including a sounding pipe 1, a displacement meter 2 and a measuring device 3, where the sounding pipe 1 is buried in a foundation pile, the displacement meter 2 is disposed above the sounding pipe 1, and the measuring device 3 is disposed inside the sounding pipe 1.
The displacement meter 2 is connected below a cross beam 4, the cross beam 4 is arranged above the sounding pipe 1, and the lower end of the cross beam 4 is provided with a reference beam 5; the reference beam 5 is used for calibration before the initial metrology.
The measuring device 3 comprises a positioning plate 31, a magnet 32 and a guide rod 33, a lead 34 penetrates through the positioning plate 31, the tail end of the lead 34 penetrates and winds the displacement meter 2, the diameter of the positioning plate 31 is smaller than the inner diameter of the sounding pipe 1, the magnet 32 is welded below the positioning plate 31, the guide rod 33 is welded below the magnet 32, a hollow slide block 35 is sleeved on the guide rod 33, the inner diameter of the slide block 35 is slightly larger than the diameter of the guide rod 33, so that the slide block 35 can slide up and down along the guide rod 33, a descending stop sheet 36 is welded on the guide rod 33, the descending stop sheet 36 is positioned below the slide block 35, two clamping arms 37 are arranged at the tail end of the guide rod 33, the two clamping arms 37 are hinged at the tail end of the guide rod 33 in a V shape, a connecting rod 38 is arranged between each clamping arm 37 and the slide block 35, one end of the connecting rod 38 is hinged with the clamping arm 37, and the other end of the connecting rod 38 is hinged with the slide block 35; in this embodiment, the positioning plate 31 is made of light plastic with light weight, the thickness of the positioning plate is 0.5 cm-1 cm, and the diameter of the positioning plate is slightly smaller than 2 mm; the slider 35 is made of an armature; the displacement meter 2 is composed of a pulley and a displacement sensor, the lead 34 moves on the pulley so as to drive the pulley to rotate, and the pulley rotates to enable the displacement sensor to complete metering.
In this embodiment, the clip arms 37 are made of steel with high hardness, the tail end of each clip arm 37 is fixedly connected with an arc-shaped clip arm counterweight 39, and under the action of the clip arm counterweight 39, the center of gravity of the clip arms 37 in a natural state is located outside the tail end of the guide rod 33, so that the two clip arms 37 are in an open shape in the natural state.
Referring to fig. 5 and 6, two reducer pipes 6 symmetrical with respect to the axis of the sounding pipe 1 are welded to the inner wall of the sounding pipe 1, the two reducer pipes 6 are disposed near the bottom of the sounding pipe 1, the distance between the two reducer pipes 6 is smaller than the length of the positioning plate 31, the distance between the two reducer pipes 6 is smaller than the maximum distance when the two clamp arms 37 are opened in a natural state, an arc portion 61 is disposed at the upper end of the reducer pipe 6, and the clamp arms 37 can move downward along the arc portion 61; in this embodiment, the reducer 6 is made of rigid steel having a high hardness and is cylindrical, and the height of the reducer 6 is 5 cm.
In this embodiment, a surface weight 7 is attached to the end of the wire 34, and the mass of the surface weight 7 is greater than the sum of the masses of the measuring device 3, the slider 35, and the clamp arm 37.
The process of measuring the displacement of the pile tip by using the device provided by the embodiment comprises the following steps:
(1) embedding the sounding pipe 1 in a foundation pile, lowering the measuring device 3 to the center of the sounding pipe 1 through a lead 34, wherein in the lowering process, under the action of a clamp arm counterweight 39, two clamp arms 37 are always in an open state, when the measuring device 3 moves downwards until the clamp arms 37 contact the upper end of the reducer pipe 6, the measuring device 3 can continuously move downwards along an arc part 61 under the action of gravity, at the moment, the two reducer pipes 6 generate upward extrusion force on the clamp arms 37, under the extrusion action, the clamp arms 37 are retracted, so that the slide blocks 35 slide upwards, and the measuring device 3 continuously moves downwards to enable the clamp arms 37 to pass through the reducer pipe 6; after the clamping arms 37 pass through the diameter-changing pipe 6, under the action of the clamping arm balance weights 39, the sliding blocks 35 move downwards until being blocked by the descending-stopping sheets 36, and drive the two clamping arms 37 to be in an open state;
(2) when the measuring device 3 moves downwards until the positioning plate 31 contacts the upper ends of the diameter-changing pipes 6, because the distance between the two diameter-changing pipes 6 is smaller than the diameter of the positioning plate 31, the positioning plate 31 is clamped at the upper ends of the two diameter-changing pipes 6, the measuring device 3 cannot continue to move downwards, the tail end of the lead 34 is connected with the ground surface counterweight 7 at the moment, and because the mass of the ground surface counterweight 7 is larger than the sum of the masses of the measuring device 3, the sliding block 35 and the clamping arm 37, the positioning plate 31 with lighter weight is subjected to upward acting force to generate upward deviation under the action of the ground surface counterweight 7, and the clamping arm 37 is clamped at the lower end of the diameter-changing pipes 6 and cannot move;
(3) recording the indication of the displacement meter 2 at the moment;
(4) allowing the pile body to naturally settle, reading the reading of the displacement meter 2 at regular intervals, and recording;
(5) when the monitoring is stopped, the earth surface counterweight 7 is taken down, the positioning plate 31 moves downwards until contacting the upper end of the reducer pipe 6, the magnet 32 is electrified through the lead 34 at the moment, after the magnet 32 is electrified, the slide block 35 is attracted and moves upwards under the action of magnetic force, the slide block 35 moves upwards to drive the clamping arm 37 to contract, and then the measuring device 3 can be lifted and collected through the lead 34.
The above mentioned parts are not related to the prior art.
In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.
The features of the embodiments and embodiments described herein above may be combined with each other without conflict.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (7)
1. A device for measuring pile tip displacement, comprising:
the sounding pipe (1) is embedded in the foundation pile, two diameter-changing pipes (6) which are symmetrical about the axis of the sounding pipe (1) are arranged close to the bottom of the sounding pipe (1), and the diameter-changing pipes (6) are used for blocking the measuring device (3);
the displacement meter (2) is connected to a cross beam (4), and the cross beam (4) is arranged above the sound measuring tube (1);
measuring device (3), it arranges in sounding pipe (1), includes from last locating plate (31), electro-magnet (32) and guide arm (33) that connect gradually down, wear to establish wire (34) on locating plate (31), the end of wire (34) is worn around on displacement meter (2), cover is established and is followed its gliding slider (35) from top to bottom on guide arm (33), two card arms (37) of terminal swing joint of guide arm (33), card arm (37) and slider (35) swing joint, slider (35) are made by armature, drive slider (35) rebound behind magnet (32) circular telegram, slider (35) rebound drives card arm (37) shrink.
2. The device for measuring pile tip displacement according to claim 1, characterized in that the reducer pipe (6) is fixedly connected to the inner wall of the sounding pipe (1), the distance between the two reducer pipes (6) is smaller than the diameter of the positioning plate (31), and the distance between the two reducer pipes (6) is smaller than the maximum distance between the two clamping arms (37).
3. Device for measuring pile end displacement according to claim 1, characterized in that the reducer pipe (6) is provided with a circular arc (61) at its upper end, and the gripping arm (37) is movable downwards along the circular arc (61).
4. The device for measuring the pile tip displacement according to claim 1, wherein the tail end of each clamping arm (37) is fixedly connected with a clamping arm counterweight (39), and under the action of the clamping arm counterweight (39), the two clamping arms (37) are in an open state in a natural state.
5. The device for measuring pile tip displacement according to claim 1, characterized in that the guide rod (33) is provided with a drop stop (36), the drop stop (36) is located below the slide block (35), and the slide block (35) is blocked when moving down to the drop stop (36).
6. Device for measuring pile end displacement according to claim 1, characterized in that a connecting rod (38) is arranged between each gripping arm (37) and the slide (35), one end of the connecting rod (38) being hinged to the gripping arm (37) and the other end of the connecting rod (38) being hinged to the slide (35).
7. Device for measuring pile tip displacement according to claim 1, characterized in that the end of the wire (34) is connected to a ground weight (7), the mass of the ground weight (7) being greater than the sum of the masses of the measuring device (3), the slide (35) and the gripping arm (37).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120614096.6U CN214530829U (en) | 2021-03-25 | 2021-03-25 | Device for measuring pile tip displacement |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120614096.6U CN214530829U (en) | 2021-03-25 | 2021-03-25 | Device for measuring pile tip displacement |
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| Publication Number | Publication Date |
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| CN214530829U true CN214530829U (en) | 2021-10-29 |
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| CN202120614096.6U Expired - Fee Related CN214530829U (en) | 2021-03-25 | 2021-03-25 | Device for measuring pile tip displacement |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115387404A (en) * | 2022-08-29 | 2022-11-25 | 中煤长江基础建设有限公司 | Concrete liquid level height detection device and detection method for cast-in-place pile |
-
2021
- 2021-03-25 CN CN202120614096.6U patent/CN214530829U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115387404A (en) * | 2022-08-29 | 2022-11-25 | 中煤长江基础建设有限公司 | Concrete liquid level height detection device and detection method for cast-in-place pile |
| CN115387404B (en) * | 2022-08-29 | 2024-03-22 | 中煤长江基础建设有限公司 | Concrete liquid level detection device and detection method for cast-in-place pile |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211029 |
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| CF01 | Termination of patent right due to non-payment of annual fee |