CN206090651U - Experimental displacement testing device of pile bearing capacity - Google Patents
Experimental displacement testing device of pile bearing capacity Download PDFInfo
- Publication number
- CN206090651U CN206090651U CN201621089911.7U CN201621089911U CN206090651U CN 206090651 U CN206090651 U CN 206090651U CN 201621089911 U CN201621089911 U CN 201621089911U CN 206090651 U CN206090651 U CN 206090651U
- Authority
- CN
- China
- Prior art keywords
- container
- bearing capacity
- differential pressure
- pile bearing
- test
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model discloses an experimental displacement testing device of pile bearing capacity relates to pile bearing capacity detection technical field, including sealed first container, sealed second container and differential pressure sensor, the second container is equipped with the fill orifice that can seal, and the second container is linked together with first container bottom, differential pressure sensor one end links to each other with the top of first container, and the other end links to each other with the top of second container. The utility model discloses an experimental displacement testing device of pile bearing capacity need not the benchmark roof beam, lays the construction simply, can eliminate the human factor influence, reduces to test the error, improves the measuring accuracy.
Description
Technical field
The utility model is related to pile bearing capacity detection technique field, and in particular to a kind of pile bearing capacity test displacement is surveyed
Trial assembly is put.
Background technology
In pile bearing capacity process of the test, the accurate test of foundation pile displacement is a critically important action, foundation pile position
Move whether test mainly bearing capacity of the foundation load-displacement curves to determine foundation pile meets design requirement.
Displacement measurement method in pile bearing capacity test commonly used in the prior art will settle bar one end using sedimentation bar
The test point of connection foundation pile, the other end is extended to more than ground, and sedimentation bar is connected with displacement measurement instrument, heavy for detecting
Drop bar displacement, so as to obtain foundation pile displacement according to sedimentation bar displacement.On the one hand, displacement measurement instrument when in use, need to have enough
The datum line beam of rigidity and stability, for fixed and bracing displacement test instrumentation, datum line beam construction time and effort consuming, and requires benchmark
Beam can not be touched destruction, nearby not have vibration source, affected not by the interference such as direct sunlight and wind and rain, not by test pile sinking.
On the other hand, in order to directly according to sedimentation bar displacement obtain each measuring point displacement of foundation pile, need displacement measurement instrument
Table is installed vertically on sedimentation bar so that the installation perpendicularity requirement to displacement test instrumentation is very high, increases laying construction difficult
Degree, is affected larger by human factor, easily increases test error, affects the accuracy of measurement.Furthermore, due to foundation pile displacement pair
Measuring accuracy has high demands, and the range of displacement transducer is usually no more than 50mm, adapts to foundation pile displacement and is widely varied
Situation, needs the position for repeatedly adjusting displacement transducer in process of the test, cumbersome, and causes measurement accuracy to reduce.
Utility model content
For defect present in prior art, the purpose of this utility model is to provide a kind of pile bearing capacity to test position
Test device is moved, construction is laid simply, human factor impact can be eliminated, reduce test error, improve the accuracy of measurement.
To reach object above, the present invention is adopted the technical scheme that：
A kind of pile bearing capacity tests displacement tester, including：
First container of sealing；
The second container of sealing, the second container is provided with sealable fill orifice, the second container and the first container
Bottom is connected；
Differential pressure pickup, described differential pressure pickup one end is connected with the top of first container, the other end and described
The top of two containers is connected.
On the basis of above-mentioned technical proposal, the intracavity section product of the second container and the first container is equal.
On the basis of above-mentioned technical proposal, first container side is provided with a sealable overfall.
On the basis of above-mentioned technical proposal, the differential pressure pickup is with the first container by first gas communicating pipe phase
Even, the differential pressure pickup is connected with second container by second gas communicating pipe, the first gas communicating pipe and the second gas
Body communicating pipe, volume was proportional.
On the basis of above-mentioned technical proposal, first container includes a top cover, and a through hole is offered on the top cover,
The first gas communicating pipe, one end connected the differential pressure pickup, and the other end connects the through hole.
On the basis of above-mentioned technical proposal, the second gas communicating pipe one end be connected with the differential pressure pickup, separately
One end is connected with the fill orifice.
On the basis of above-mentioned technical proposal, also including data acquisition and transmitting device, LCDs, the data are adopted
Collection is connected with transmitting device with differential pressure pickup, LCDs.
Compared with prior art, the utility model has the advantage of：
(1) the utility model pile bearing capacity test displacement tester includes first container and second container of sealing,
First container is connected with second container, and two containers connect respectively the two ends of differential pressure pickup, when in use, only need to be according to two
The change of air pressure difference in individual container is obtained foundation pile displacement, and the device at foundation pile test point need not be exactly perpendicularly to connection
Bar, lays construction simply, can eliminate human factor impact, reduces test error, improves the accuracy of measurement.
(2) the first container is provided with sealable overfall in the utility model, can inject from the fill orifice of second container
Liquid medium, until the liquid medium in the first container flows out from overfall so that liquid is situated between in the first container and second container
The initial liquid level of matter is identical, and simple structure is easy to operate, reduces measure error.
Description of the drawings
Fig. 1 is the structural representation that pile bearing capacity tests displacement tester in the utility model embodiment；
Fig. 2 is the schematic diagram of pile bearing capacity displacement measurement method in the utility model embodiment；
Fig. 3 is pile bearing capacity displacement measurement principle schematic in the utility model embodiment.
In figure：The containers of 1- first, 11- overfalls, 12- top covers, 13- through holes, 2- second containers, 21- fill orifices, 3- pressure reduction
Sensor, 4- first gas communicating pipes, 5- second gas communicating pipes, 6- data acquisitions and transmitting device, 7- LCDs, 8-
Foundation pile, 9- connecting rods, 10- load boxes.
Specific embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
Shown in Figure 1, the utility model embodiment provides a kind of pile bearing capacity and tests displacement tester, including：
First container 1 of sealing, the second container 2 for sealing and differential pressure pickup 3.
The intracavity section product of the container 1 of second container 2 and first is equal.The side of first container 1 is provided with a sealable overflow
Mouth 11.First container 1 includes a top cover 12, and a through hole 13 is offered on top cover 12.Second container 2 is provided with sealable fill orifice
21, second container 2 is connected with the bottom of the first container 1.
The one end of differential pressure pickup 3 is connected with the top of the first container 1, and the other end is connected with the top of second container 2.Pressure reduction
With the first container 1 by being connected first gas communicating pipe 4, differential pressure pickup 3 passes through second gas to sensor 3 with second container 2
Communicating pipe 5 be connected, first gas communicating pipe 4 and second gas communicating pipe 5 volume it is proportional, can associated ideal gaseous state
Equation takes temperature-compensating measure to eliminate the impact of temperature.One end connection of first gas communicating pipe 4 differential pressure pickup 3, the other end
Connection through hole 13.Second gas communicating pipe 5, one end was connected with differential pressure pickup 3, and the other end is connected with fill orifice 21.
Pile bearing capacity test displacement tester of the present utility model also includes data acquisition and transmitting device 6, liquid crystal
Display screen 7, data acquisition is connected with transmitting device 6 with differential pressure pickup 3, LCDs 7.
When displacement tester is tested using the utility model pile bearing capacity, only need to be according to draught head in two containers
The change of value is obtained foundation pile displacement, and the device at foundation pile test point is laid without the need for being installed vertically on completely in connecting rod
Construction is simple, can eliminate human factor impact, reduces test error, improves the accuracy of measurement；Also, base of the present utility model
Pile bearing capacity is tested displacement tester and is designed using totally enclosed type, can avoid the shadow of atmospheric pressure change and wind field to test
Ring, can also reduce test error, improve the accuracy of measurement.
It is shown in Figure 2, also provide a kind of using the test displacement survey of above-mentioned pile bearing capacity in the utility model embodiment
The pile bearing capacity displacement measurement method that trial assembly is put, it is for testing displacement of the foundation pile 8 under test bearing capacity effect including following
Step：
S1：Appropriate amount of fluid medium is injected from the fill orifice 21 of second container 2, the liquid medium is flowed into the first container 1
In second container 2, and fill orifice 21 is closed；
S2：The first container 1 is fixedly mounted on ground near foundation pile 8；
S3：Test point is chosen on foundation pile 8, connecting rod 9 is set at test point, and connecting rod 9 is extended on foundation pile 8
Side, on the top of connecting rod 9 second container 2 is installed, the position for making the initial position height of second container 2 be located with the first container 1
It is highly identical；
S4：Differential pressure pickup 3 is surveyed and reads air pressure difference initial in the first container 1 and second container 2, in load box 10
Injection hydraulic oil, differential pressure pickup 3 surveys again the air pressure difference read in the first container 1 and second container 2 after change；
S5：Data are read in the survey for obtaining differential pressure pickup 3 by data acquisition and transmitting device 6, LCDs 7.
In the utility model, the automatic data collection of RS485/RF/GPRS standards is supported in data acquisition with transmitting device 6.At this
In embodiment, the upper surface of foundation pile 2 and the upper surface of load box 10 are chosen as test point, according to the method described above step, every
Pile bearing capacity test displacement tester is respectively mounted in individual test point.Specifically, is respectively mounted in each test point
Two containers 2, are then correspondingly arranged the first container 1 being connected with second container 2 on the neighbouring ground outside loading effect area.
When the vertical displacement of foundation pile 8 test is carried out, the connecting rod top being connected with test point can also pacify the utility model
The first container 1 is filled, second container 2 is fixedly installed on the ground near foundation pile 8, two kinds of different arrangement differential pressure pickups
Test result absolute value it is identical, the positive and negative difference of numerical value.
In step S1, sealable overfall 11 is provided with the side of the first container 1, overfall 11 is opened, from second container 2
Fill orifice 21 injection liquid medium, in second container 2 after hydraulically full medium, then make liquid medium flow into the first container 1, directly
Liquid medium into the first container 1 flows out from overfall 11, now stops injection liquid medium, and gravity makes the He of the first container 1
The initial liquid level of liquid medium is identical in second container 2, closes overfall 11, and simple structure is easy to operate, is easy to the device
Commercialization is produced.
Shown in Figure 3, the test philosophy for testing the utility model pile bearing capacity displacement tester makees further
Illustrate, p1For the pressure of closed gas in original state second container 2, p3For the pressure of closed gas in the first container of original state 1
By force, h ' is poor for the liquid level elemental height of the first container 1 and second container 2, and ρ, g are respectively the density of liquid medium and gravity accelerates
Degree.Then have：
p3+ ρ gh '=p1 (1)
The initial reading Δ of differential pressure pickup 31For：
Δ1=p1-p3=ρ gh ' (2)
After there is vertical displacement u at test point, p2For closed gas in second container 2 after test point generation vertical displacement
Pressure, p4For the pressure that test point occurs closed gas in the first container 1 after vertical displacement, v1For original state second container 2
The volume of interior closed gas, A1Lumenal cross-section for second container 2 is accumulated, Δ l1There is the second appearance after vertical displacement for test point
The height change value of liquid medium, v in device 23For the volume of closed gas in the first container of original state 1, A3For the first container 1
Lumenal cross-section product, Δ l3For the height change value that test point occurs liquid medium in the first container 1 after vertical displacement.It is closed
Gas is approximately perfect gas, meets The Ideal-Gas Equation, now the reading Δ of differential pressure pickup 32For：
From formula (1)～(3), the difference of reading Δ of differential pressure pickup 3 before and after test point vertical displacement occurs is：
Due to there is geometrical relationship：
U=Δ h+ Δ l1+Δl3-h′ (5)
Wherein Δ h is that the liquid level of the first container 1 and second container 2 after test point generation vertical displacement is poor.
Obviously
Δ=ρ g Δ h (6)
Continuity equation is：
A1Δl1=A3Δl3 (7)
Simultaneous formula (4)～formula (7), obtains：
The range of differential pressure pickup 3 is -1kPa～1kPa in the embodiment, and pressure test precision chooses 0.1Pa can be full
Full border test request.In whole test process, liquid medium is in quasi- inactive state in the first container 1 and second container 2,
Liquid medium can adopt water, when the temperature is low, also can select silicone oil or appropriate anti-icing fluid is filled in water.
When the elevation such as liquid level in the first container of original state 1 and second container 2, i.e. h '=0 makes p3=p1=p0, A1=
A3, l1=l3, p0For standard atmospheric pressure, h0For calibrated altitude, l1For gas in second container 2 before test point generation vertical displacement
Height, l3For the height that test point occurs gas in the first container 1 before vertical displacement, formula (8) abbreviation is：
When liquid medium is pure water, have：
Δ h～u the respective values for solving, are shown in Table 1.
The Δ h of table 1～u mapping tables
Work as A1<<A3When,Δl3→ 0, then have：
I.e.：
Δh2+(h0+l1-u)Δh-h0U=0 10
Δ h～u respective values that it is solved, are shown in Table 2.
The Δ h of table 2～u mapping tables
From table 1, table 2：u≈Δh.For the engineering reality of pile bearing capacity test, l is selected1=1.25mm, foundation pile
Vertical displacement during test is less than 100mm, and now absolute error is less than 0.012mm, fully meets test request.
Therefore, formula (6), (8) show, as long as measuring the pressure difference that foundation pile 8 occurs the differential pressure pickup 3 before and after vertical displacement
ρ g Δ h, you can obtain vertical displacement value u at the test point.
This test device and method can be used for the displacement measurement in pile bearing capacity test, and test result disturbs little, precision
Height, lays easy to operate.
The utility model is not limited to above-mentioned embodiment, for those skilled in the art, not
On the premise of departing from the utility model principle, some improvements and modifications can also be made, these improvements and modifications are also considered as this reality
Within new protection domain.The content not being described in detail in this specification belongs to known to professional and technical personnel in the field
Prior art.
Claims (7)
1. a kind of pile bearing capacity tests displacement tester, it is characterised in that include：
First container (1) of sealing；
The second container (2) of sealing, the second container (2) is provided with sealable fill orifice (21), the second container (2) with
First container (1) bottom is connected；
Differential pressure pickup (3), described differential pressure pickup (3) one end is connected with the top of first container (1), the other end and institute
The top for stating second container (2) is connected.
2. pile bearing capacity as claimed in claim 1 tests displacement tester, it is characterised in that：The second container (2)
Accumulate equal with the intracavity section of the first container (1).
3. pile bearing capacity as claimed in claim 1 tests displacement tester, it is characterised in that：First container (1)
Side is provided with a sealable overfall (11).
4. pile bearing capacity as claimed in claim 1 tests displacement tester, it is characterised in that：The differential pressure pickup
(3) it is connected by first gas communicating pipe (4) with the first container (1), the differential pressure pickup (3) passes through with second container (2)
Second gas communicating pipe (5) is connected, and the first gas communicating pipe (4) and second gas communicating pipe (5) volume are proportional.
5. pile bearing capacity as claimed in claim 4 tests displacement tester, it is characterised in that：First container (1)
Including a top cover (12), a through hole (13) is offered on the top cover (12), described first gas communicating pipe (4) one end connects institute
Differential pressure pickup (3) is stated, the other end connects the through hole (13).
6. pile bearing capacity as claimed in claim 4 tests displacement tester, it is characterised in that：The second gas connection
Pipe (5) one end is connected with the differential pressure pickup (3), and the other end is connected with the fill orifice (21).
7. pile bearing capacity as claimed in claim 1 tests displacement tester, it is characterised in that：Also include data acquisition with
Transmitting device (6), LCDs (7), the data acquisition and transmitting device (6) and differential pressure pickup (3), LCDs
(7) it is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621089911.7U CN206090651U (en) | 2016-09-28 | 2016-09-28 | Experimental displacement testing device of pile bearing capacity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621089911.7U CN206090651U (en) | 2016-09-28 | 2016-09-28 | Experimental displacement testing device of pile bearing capacity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206090651U true CN206090651U (en) | 2017-04-12 |
Family
ID=58481607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621089911.7U Active CN206090651U (en) | 2016-09-28 | 2016-09-28 | Experimental displacement testing device of pile bearing capacity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206090651U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106223376A (en) * | 2016-09-28 | 2016-12-14 | 中铁大桥科学研究院有限公司 | A kind of pile bearing capacity test displacement tester and method |
| CN108759781A (en) * | 2018-06-11 | 2018-11-06 | 武汉二航路桥特种工程有限责任公司 | The vertical displacement monitoring device and method of initial big height difference structure |
| CN109506605A (en) * | 2018-12-05 | 2019-03-22 | 武汉二航路桥特种工程有限责任公司 | The beam body vertical displacement monitoring device and method of segmented construction bridges |
| CN112723165A (en) * | 2020-12-31 | 2021-04-30 | 上海海事大学 | Measuring device for bridge crane, bridge crane and measuring method |
| CN115324129A (en) * | 2022-09-08 | 2022-11-11 | 江西联保工程咨询有限公司 | Combined type displacement test reference system |
-
2016
- 2016-09-28 CN CN201621089911.7U patent/CN206090651U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106223376A (en) * | 2016-09-28 | 2016-12-14 | 中铁大桥科学研究院有限公司 | A kind of pile bearing capacity test displacement tester and method |
| CN108759781A (en) * | 2018-06-11 | 2018-11-06 | 武汉二航路桥特种工程有限责任公司 | The vertical displacement monitoring device and method of initial big height difference structure |
| CN108759781B (en) * | 2018-06-11 | 2024-01-16 | 中交特种工程有限公司 | Vertical displacement monitoring device and method for initial large-height-difference structure |
| CN109506605A (en) * | 2018-12-05 | 2019-03-22 | 武汉二航路桥特种工程有限责任公司 | The beam body vertical displacement monitoring device and method of segmented construction bridges |
| CN109506605B (en) * | 2018-12-05 | 2024-02-13 | 中交特种工程有限公司 | Device and method for monitoring vertical displacement of beam body of sectional construction bridge |
| CN112723165A (en) * | 2020-12-31 | 2021-04-30 | 上海海事大学 | Measuring device for bridge crane, bridge crane and measuring method |
| CN115324129A (en) * | 2022-09-08 | 2022-11-11 | 江西联保工程咨询有限公司 | Combined type displacement test reference system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206090651U (en) | Experimental displacement testing device of pile bearing capacity | |
| CN202793989U (en) | Light constant head permeameter for porous concrete | |
| CN102252797B (en) | U-shaped pipe pressure meter and pressure measurement method thereof | |
| CN203720054U (en) | Porous vegetation concrete permeability performance determinator | |
| CN103487564A (en) | Double-chamber determinator for volume frost-heaving ratio of frozen soil | |
| CN205157556U (en) | Soil body frozen -heave factor and melting sinks coefficient and jointly surveys test instrument | |
| CN106768499B (en) | Hydraulic soil pressure sensor | |
| CN103592000B (en) | A kind of liquid level emasuring device | |
| CN106223376B (en) | A kind of pile bearing capacity test displacement measurement method | |
| CN101358523B (en) | Differential pressure type flow densimeter underground | |
| CN206804037U (en) | A kind of Shockproof type instrument and meter device | |
| CN108489882A (en) | It is a kind of can more experiment control conditions Seep- Solidifying experimental provision and application method | |
| CN104748903B (en) | Liquid-gas conversion pressure measurement device and pressure measurement device with synchronous electrical measurement and digital display for tests | |
| CN208520864U (en) | A kind of device for big particle diameter soil body microdilatancy testing experiment | |
| CN208733435U (en) | A kind of highway pavement lifting degree detection device | |
| CN205280175U (en) | Take exhaust apparatus's liquid level detection ware and flow measurement device | |
| CN108981576A (en) | A kind of Simple engineering geology crack measuring device | |
| CN208239265U (en) | It is a kind of can more experiment control conditions Seep- Solidifying experimental provision | |
| CN209584749U (en) | A kind of subgrade and pavement compactness detection filling sand cylinder | |
| CN206756144U (en) | A kind of gas riser settlement gauge | |
| CN203132949U (en) | On-line densimeter | |
| CN113447098A (en) | Accurate calibration equipment of water supply meter | |
| CN207515770U (en) | A kind of quick measurement hydrostatic level | |
| CN206601129U (en) | A kind of fluid pressure type hydrostatic level | |
| CN206556713U (en) | Environment-friendly tank |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |