CN105509683B - Displacement measuring device for self-balancing pile testing method - Google Patents
Displacement measuring device for self-balancing pile testing method Download PDFInfo
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- CN105509683B CN105509683B CN201410503911.6A CN201410503911A CN105509683B CN 105509683 B CN105509683 B CN 105509683B CN 201410503911 A CN201410503911 A CN 201410503911A CN 105509683 B CN105509683 B CN 105509683B
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 55
- 238000012360 testing method Methods 0.000 title claims abstract description 27
- 238000010998 test method Methods 0.000 claims abstract description 5
- 239000000725 suspension Substances 0.000 claims description 9
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 8
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 4
- 239000001569 carbon dioxide Substances 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 abstract description 9
- 229910000831 Steel Inorganic materials 0.000 description 9
- 239000010959 steel Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 230000001681 protective effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a displacement measuring device for a self-balancing pile testing method, which comprises a displacement wire (4) connected with the upper part or the lower part of a load box in the self-balancing pile testing method, wherein at least more than three support legs (2) are arranged around a support seat (1), a fixed pulley assembly (3) is matched on each support leg (2) in a sliding manner, the displacement wire (4) is connected with a counterweight (5) after bypassing a fixed pulley (302) on the fixed pulley assembly (3), and a displacement sensor (6) fixed on each support leg (2) monitors the movement amount of the displacement wire (4) in real time. The self-balancing pile test device is simple in structure, flexible and changeable in operation, suitable for measuring the displacement of the pile bodies with different diameters, accurate in measurement precision and significant in popularization of a self-balancing pile test method.
Description
Technical Field
The invention relates to a displacement measuring device for a self-balancing pile test method, and belongs to the technical field of foundation pile testing.
Background
A self-balancing pile test technique features that a special loading unit, load box, is embedded in the pile together with reinforcing cage at a relative position before pouring concrete, the pressure tube of loading box and the needed displacement tester are led to ground from pile body, and the pile is poured. The load box is pressurized and loaded by a pressurizing pump on the ground, and the load box generates forces in the upper direction and the lower direction and transmits the forces to the pile body. Because pile body and pile circumference ground body side hinder and become the counter-force by oneself, will obtain the data that is equivalent to two static load tests: the corresponding reaction series parameters of the upper part of the pile body during reverse loading are obtained from the part above the load box; through calculation and analysis of the relation between the loading force and the parameters (displacement and the like), not only can the bearing capacity of the pile foundation be obtained, but also a series of pile foundation engineering design data such as limit side resistance parameters of each layer of rock soil body, pile limit end resistance and the like can be obtained after the pile foundation is pre-buried with certain stress and strain test elements. The pile testing method based on the principle is called as a self-balancing pile testing method in the domestic industry, can be used for providing data basis for pile body design and can also be used for testing the bearing capacity of the engineering pile. The application numbers are: "200920086024.8", invention name: the Chinese patent document of 'a displacement acquisition device for a self-balancing pile testing method' discloses a displacement acquisition device for a self-balancing pile testing method, which is characterized in that one end of a steel wire rope is connected with an elastic clamping device, then the elastic clamping device is put into a protective tube and slides downwards along the inner wall of the protective tube, when the steel wire rope reaches the position of a load box, the steel wire rope can be clamped on a top plate or a bottom plate of the load box, meanwhile, a heavy hammer is tied at the other end of the steel wire rope to ensure that the steel wire rope is in a stretched straight state, the steel wire rope is wound on a rope pulley of a grating sensor, and when the steel wire rope moves up and down, the corresponding grating sensor main grating can be driven to rotate clockwise or anticlockwise to. However, the suspension fixing plate of the device is fixed on the beam, the grating sensor is installed on the suspension fixing plate, and the steel wire rope is wound on the rope pulley of the grating sensor, in the actual test process, because the diameter of the tested pile is different, and the position of the suspension fixing plate can not be adjusted, the steel wire rope is often not wound on the rope pulley of the grating sensor vertically after being led out from the protective pipe, which not only has the problems of difficult operation and inconvenient use, but also can influence the measurement precision of the pile body displacement in the self-balancing pile testing method during measurement, and can not achieve the ideal effect. Therefore, the use effect of the displacement measuring device of the existing self-balancing pile testing method is not ideal enough, and the use requirement cannot be met.
Disclosure of Invention
The invention aims to provide a displacement measuring device for a self-balancing pile test method, which has the advantages of simple structure, flexible and changeable operation, adaptability to measurement of pile bodies with different diameters, accurate measurement precision and capability of overcoming the defects of the prior art.
The technical scheme of the invention is as follows: the utility model provides a displacement measurement device for self-balancing test pile method, includes the displacement silk of connecting load case upper portion or lower part in the self-balancing test pile method, is provided with the landing leg more than three at least around the supporting seat, and sliding fit has fixed pulley assembly on the landing leg, and the displacement silk is connected with the counter weight after the fixed pulley on the fixed pulley assembly is walked around to the displacement silk, fixes the displacement sensor real-time supervision displacement silk's on the landing leg amount of movement.
A cross beam is hung between the adjacent supporting legs through a hanging device, and a fixed pulley assembly is matched on the cross beam in a sliding mode.
The fixed pulley assembly comprises a fixed pulley and a first sleeve in sliding fit with the supporting leg or the cross beam, and locking screws are arranged on two sides of the first sleeve.
The suspension device comprises a second sleeve in sliding fit with the supporting leg and a third sleeve in sliding fit with the cross beam, the third sleeve is connected with the second sleeve through a hanging pin and can rotate around the hanging pin, and locking screws are arranged on two sides of the second sleeve.
The displacement wire is made of the carbon dioxide protection welding wire, the carbon dioxide protection welding wire is high in plastic deformation resistance, the ductility of the carbon dioxide protection welding wire can be ignored, and the measurement accuracy of the displacement is guaranteed.
By adopting the technical scheme, the displacement wire is connected with the counterweight after bypassing the fixed pulley on the fixed pulley assembly, so that the displacement wire is ensured to be in a tensioned state all the time, and meanwhile, the position of the fixed pulley assembly can be freely adjusted on a horizontal plane, so that the displacement wire is vertical to the horizontal plane, and the measurement accuracy of the pile body displacement in the self-balancing pile testing method is ensured to be more accurate. Therefore, the self-balancing pile test device is simple in structure, flexible and changeable in operation, suitable for measuring the displacement of the pile bodies with different diameters, accurate in measurement precision and significant in popularization of a self-balancing pile test method.
Drawings
FIG. 1 is a perspective view of a schematic structure of a first embodiment of the present invention;
FIG. 2 is a perspective view of a schematic structural diagram of a second embodiment of the present invention;
FIG. 3 is a perspective view of a schematic of the construction of the fixed sheave assembly;
fig. 4 is a perspective view of a schematic construction of the suspension device.
Description of reference numerals: 1-supporting seat, 2-supporting leg, 3-fixed pulley component, 4-displacement wire, 5-counterweight, 6-displacement sensor, 7-cover plate, 8-stud, 9-nut, 10-suspension device, 11-cross beam, 12-locking screw, 101-second sleeve, 102-hanging pin, 103-third sleeve, 301-first sleeve and 302-fixed pulley.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and examples.
Example one
The displacement measuring device for the self-balancing pile testing method is shown in fig. 1 (fig. 1 is a simplified view, only one of the displacement wires is shown), and comprises a displacement wire 4 connected with the upper part or the lower part of a load box in the self-balancing pile testing method, 6 support legs 2 are arranged around a support seat 1, a fixed pulley assembly 3 is matched on each support leg 2 in a sliding manner, the displacement wire 4 is connected with a counterweight 5 after bypassing a fixed pulley 302 on the fixed pulley assembly 3, so that the displacement wire 4 is always in a tightening state, then the position of a first sleeve 301 on each support leg 2 is adjusted, the displacement wire 4 is perpendicular to a horizontal plane, and locking screws 12 on two sides of the first sleeve 301 are tightened as shown in fig. 3, and at the moment, the displacement sensor 6 can be adopted to monitor the displacement of the displacement wire 4 in.
Example two
The displacement measuring device for the self-balancing test pile method is shown in fig. 2 (fig. 2 only shows one displacement wire for simplifying the view), and comprises a displacement wire 4 connected with the upper part or the lower part of a load box in the self-balancing test pile method, 6 support legs 2 are arranged around a support seat 1, a cross beam 11 is hung between the adjacent support legs 2 through a suspension device 10, a fixed pulley assembly 3 is matched on the cross beam 11 in a sliding manner, and the displacement wire 4 is connected with a counterweight 5 after bypassing a fixed pulley 302 on the fixed pulley assembly 3, so that the displacement wire 4 is always in a tightening state. As shown in fig. 4, the suspension device 10 comprises a second sleeve 101 slidably engaged with the leg 2 and a third sleeve 103 slidably engaged with the beam 11, wherein the third sleeve 103 is connected with the second sleeve 101 through a hanging pin 102 and can rotate around the hanging pin 102, and locking screws 12 are arranged on two sides of the second sleeve 101. In operation, after the position of the second sleeve 101 on the leg 2 and the position of the first sleeve 301 on the cross beam 11 are adjusted to make the displacement wire 4 perpendicular to the horizontal plane, as shown in fig. 3 and 4, the locking screws 12 on the two sides of the second sleeve 101 and the first sleeve 301 are tightened, and at this time, the displacement sensor 6 can be used to monitor the movement amount of the displacement wire 4 in real time.
Claims (2)
1. A displacement measuring device for a self-balancing pile testing method comprises a displacement wire (4) connected with the upper part or the lower part of a load box in the self-balancing pile testing method, and is characterized in that more than three support legs (2) are arranged around a support seat (1), a fixed pulley assembly (3) is matched on each support leg (2) in a sliding manner, the displacement wire (4) bypasses a fixed pulley (302) on the fixed pulley assembly (3) and then is connected with a counterweight (5), and a displacement sensor (6) fixed on each support leg (2) monitors the movement amount of the displacement wire (4) in real time; a cross beam (11) is hung between the adjacent supporting legs (2) through a hanging device (10), and a fixed pulley assembly (3) is matched on the cross beam (11) in a sliding way; the fixed pulley assembly (3) comprises a fixed pulley (302) and a first sleeve (301) in sliding fit with the supporting leg (2) or the cross beam (11), and locking screws (12) are arranged on two sides of the first sleeve (301); the suspension device (10) comprises a second sleeve (101) in sliding fit with the supporting leg (2) and a third sleeve (103) in sliding fit with the cross beam (11), the third sleeve (103) is connected with the second sleeve (101) through a hanging pin (102) and can rotate around the hanging pin (102), and locking screws (12) are arranged on two sides of the second sleeve (101).
2. The displacement measuring device for the self-balancing pile test method according to claim 1, wherein the displacement wire (4) is made of carbon dioxide protection welding wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410503911.6A CN105509683B (en) | 2014-09-22 | 2014-09-22 | Displacement measuring device for self-balancing pile testing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410503911.6A CN105509683B (en) | 2014-09-22 | 2014-09-22 | Displacement measuring device for self-balancing pile testing method |
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| Publication Number | Publication Date |
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| CN105509683A CN105509683A (en) | 2016-04-20 |
| CN105509683B true CN105509683B (en) | 2020-04-24 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106066141A (en) * | 2016-06-15 | 2016-11-02 | 武汉中和工程技术有限公司 | The pile body shifting discharge observation device of foundation pile self-balanced static-load testing and measuring method |
| CN108824508A (en) * | 2018-09-12 | 2018-11-16 | 贵州鑫瑞达科技有限公司 | A kind of load test system for concrete pipe base |
| CN110106922A (en) * | 2019-04-01 | 2019-08-09 | 南昌永祺科技发展有限公司 | A kind of pile bearing capacity test displacement measurement integrated apparatus and test method |
| CN111256979B (en) * | 2020-03-25 | 2025-02-21 | 贾佳 | Expansion monitoring device and system |
| CN112212817B (en) * | 2020-10-10 | 2025-03-18 | 中国计量大学 | Dynamic wire width measuring device |
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|---|---|---|---|---|
| GB1413160A (en) * | 1972-12-20 | 1975-11-05 | Shell Int Research | Method and means for load testing openended piles penetrating the soil |
| CN1385586A (en) * | 2002-06-17 | 2002-12-18 | 浙江大学 | Vacuum negative pressure static force pile testing method and device thereof |
| CN2564986Y (en) * | 2002-10-11 | 2003-08-06 | 长葛市黄河电气有限公司 | Stroke signal detector for precise displacement sensor of piston stroke |
| ES2221783B1 (en) * | 2002-10-18 | 2006-12-16 | Universidad De Almeria | DEVICE FOR MEASURING THE FOUNDATION BEHAVIOR BEFORE A TRACTION OR COMPRESSION EFFORT. |
| CN1896712A (en) * | 2006-06-14 | 2007-01-17 | 郭杨 | Planar loading testing method and tester for self-balanced deep foundation piles |
| CN201463838U (en) * | 2009-05-31 | 2010-05-12 | 葛云峰 | Displacement acquisition device for self-balance loading method |
| CN101839002A (en) * | 2010-05-27 | 2010-09-22 | 关喜才 | Compressive pile full-automatic hydraulic load detection device and method+ |
| CN103063175A (en) * | 2012-12-19 | 2013-04-24 | 东南大学 | Hanging-type electric displacement measuring device |
| CN103323336A (en) * | 2013-01-22 | 2013-09-25 | 同济大学 | Simulation experiment apparatus used for testing drawing force of anchor pole and application method thereof |
| CN204085480U (en) * | 2014-09-22 | 2015-01-07 | 贵州中建建筑科研设计院有限公司 | A kind of displacement measuring device for self-balanced test method |
-
2014
- 2014-09-22 CN CN201410503911.6A patent/CN105509683B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1413160A (en) * | 1972-12-20 | 1975-11-05 | Shell Int Research | Method and means for load testing openended piles penetrating the soil |
| CN1385586A (en) * | 2002-06-17 | 2002-12-18 | 浙江大学 | Vacuum negative pressure static force pile testing method and device thereof |
| CN2564986Y (en) * | 2002-10-11 | 2003-08-06 | 长葛市黄河电气有限公司 | Stroke signal detector for precise displacement sensor of piston stroke |
| ES2221783B1 (en) * | 2002-10-18 | 2006-12-16 | Universidad De Almeria | DEVICE FOR MEASURING THE FOUNDATION BEHAVIOR BEFORE A TRACTION OR COMPRESSION EFFORT. |
| CN1896712A (en) * | 2006-06-14 | 2007-01-17 | 郭杨 | Planar loading testing method and tester for self-balanced deep foundation piles |
| CN201463838U (en) * | 2009-05-31 | 2010-05-12 | 葛云峰 | Displacement acquisition device for self-balance loading method |
| CN101839002A (en) * | 2010-05-27 | 2010-09-22 | 关喜才 | Compressive pile full-automatic hydraulic load detection device and method+ |
| CN103063175A (en) * | 2012-12-19 | 2013-04-24 | 东南大学 | Hanging-type electric displacement measuring device |
| CN103323336A (en) * | 2013-01-22 | 2013-09-25 | 同济大学 | Simulation experiment apparatus used for testing drawing force of anchor pole and application method thereof |
| CN204085480U (en) * | 2014-09-22 | 2015-01-07 | 贵州中建建筑科研设计院有限公司 | A kind of displacement measuring device for self-balanced test method |
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| CN105509683A (en) | 2016-04-20 |
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