CN209117492U - It is a kind of original position hole in directly measure coefficient of collapsibility of loess and its anisotropic device - Google Patents
It is a kind of original position hole in directly measure coefficient of collapsibility of loess and its anisotropic device Download PDFInfo
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- CN209117492U CN209117492U CN201821798246.8U CN201821798246U CN209117492U CN 209117492 U CN209117492 U CN 209117492U CN 201821798246 U CN201821798246 U CN 201821798246U CN 209117492 U CN209117492 U CN 209117492U
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Abstract
The utility model discloses coefficient of collapsibility of loess and its anisotropic device, including the acquisition of loading device, load bar, bidirectional hydraulic device, data and controller, load bearing beam, earth anchor, loading device control line and load bar connector are directly measured in a kind of hole in situ.Loading device includes horizontal loading apparatus, horizontal addload porous disc, horizontal displacement sensors, Vertical loading device, Vertical loading porous disc, vertical displacement sensor and loading device connector.The utility model can obtain the coefficient of collapsibility in situ of the soil body；Soil body horizontal can be obtained simultaneously to coefficient of collapsibility of loess and vertically to coefficient of collapsibility of loess；The horizontal direction coefficient of collapsibility of loess of available different depth；The anisotropy of soil body coefficient of collapsibility can be assessed.
Description
Technical field
The utility model belongs to geotechnical engineering field, and in particular to it is a kind of original position hole in directly measure coefficient of collapsibility of loess and
Its anisotropic device is realized and is measured on place in situ to the coefficient of collapsibility of the soil body, is realized in different depth, difference
Quick in situ test under load.
Background technique
Collapsible loess is widely distributed in China, saturated yielding type, the saturated yielding grade of foundation soil in basement process and design,
It is directly related to basis selection and the method for processing foundation of building, while being also directly related to the duration of foundation, cost.
And reconnoitre the middle loess sample for needing to take different depth at the scene at the scene and carry out laboratory test to determine the collapsibility of loess, but
Some place yellow soil horizon of collapsibility are too deep and are extremely easy to disturb undisturbed soil sample in taking native, transportational process, and disturb
Soil sample afterwards directly affects the judgement to collapsibility of loess.Therefore before to Assessment of loess collapsibility, it is also very desirable to Yi Zhongjian
The influence that single effective method excludes soil sample disturbance carries out accurate judgement to the collapsibility of Loess Layer.
Utility model content
The purpose of this utility model is in view of the above-mentioned problems existing in the prior art, to provide and directly measure in a kind of hole in situ
Coefficient of collapsibility of loess and its anisotropic device, utility model device design structure is simple, easy to operate, each group component passes through
It is durable long, it is practical.
To achieve the above object, the utility model uses following technical measures:
Coefficient of collapsibility of loess and its anisotropic device are directly measured in a kind of original position hole, including data acquisition and control
Device, further includes load bearing beam, load bar and loading device,
Load bearing beam is erected at drill hole, bidirectional hydraulic device is equipped on load bearing beam, the loading end of bidirectional hydraulic device is by adding
The top for carrying bar connector and load bar connects,
Loading device include horizontal loading apparatus, horizontal addload porous disc, horizontal displacement sensors, Vertical loading device,
Vertical loading porous disc and vertical displacement sensor,
Horizontal loading apparatus includes two and is located at same straight line and towards opposite loading end, and two of horizontal loading apparatus
Loading end is connected with corresponding horizontal addload porous disc respectively, the horizontal position of the horizontal displacement for measuring horizontal addload porous disc
Displacement sensor is fixed in the fixing seat of horizontal loading apparatus, and the bottom end of load bar passes through loading device connector and horizontal addload
The fixing seat of device connects,
The fixing seat of Vertical loading device and the fixing seat of horizontal loading apparatus connect, and the loading end of Vertical loading device connects
Vertical loading porous disc is connect, is fixed on vertical add for measuring the vertical displacement sensor of vertical displacement of Vertical loading porous disc
It carries in the fixing seat set,
Data acquisition connect bidirectional hydraulic device by hydraulic control line with controller, and data acquisition also passes through with controller to be added
It carries and sets control line and connect respectively with the control terminal of the control terminal of horizontal loading apparatus and Vertical loading device.
Vertical loading porous disc as described above is circle, and it is permeable that the center of circle of Vertical loading porous disc is provided with Vertical loading
Plate connector 131, Vertical loading porous disc connector 131 are connect with the loading end of Vertical loading device, Vertical loading porous disc
On be uniformly distributed Vertical loading porous disc permeable hole 132.
Horizontal addload porous disc as described above is arc panel, shape and the drilling of the extrados of horizontal addload porous disc
The shape adaptation of inner wall, horizontal addload porous disc extrados are provided with vertical striped 18, the loading end and water of horizontal loading apparatus
The intrados connection of flat load porous disc.
The utility model compared with the existing technology, has the advantages that
1) coefficient of collapsibility in situ of the soil body can be obtained；
2) present apparatus can obtain soil body horizontal to coefficient of collapsibility of loess and vertically to coefficient of collapsibility of loess simultaneously；
3) the horizontal direction coefficient of collapsibility of loess of available different depth；
4) anisotropy of soil body coefficient of collapsibility can be assessed.
Detailed description of the invention
Fig. 1 is the utility model overall structure diagram；
Fig. 2 is the structural schematic diagram of loading device；
Fig. 3 is the structural schematic diagram of Vertical loading porous disc；
Fig. 4 is the structural schematic diagram of horizontal addload porous disc.
In figure, 1- loading device；2- load bar；3- bidirectional hydraulic device；The acquisition of 4- data and controller；5- load bearing beam；6-
Earth anchor；7- loading device control line；8- load bar connector；9- load bar connector；10- hydraulic control line；11- horizontal addload
Device；12- horizontal addload porous disc；13- horizontal displacement sensors；14- Vertical loading device；15- Vertical loading porous disc；
16- vertical displacement sensor；17- loading device connector；The vertical striped of 18-；131- Vertical loading porous disc connector；132-
Vertical loading porous disc permeable hole.
Specific embodiment
The utility model is understood and implemented for the ease of those of ordinary skill in the art, it is practical to this below with reference to embodiment
It is novel to be described in further detail, it should be understood that it is practical new that implementation example described herein is only used for describing and explaining this
Type is not used to limit the utility model.
Embodiment 1:
As shown in Figure 1, directly testing coefficient of collapsibility measuring device in hole, including loading device 1, load bar 2, bidirectional hydraulic
Device 3, data acquisition and controller 4, load bearing beam 5, earth anchor 6, loading device control line 7, load bar connector 9.
Load bearing beam 5 is erected at drill hole, and bidirectional hydraulic device 3 is equipped on load bearing beam 5, and the loading end of bidirectional hydraulic device 3 is logical
It crosses load bar connector 9 to connect with the top of load bar 2, the bottom end of load bar 2 extends in drilling and connects with loading device 1
It connects.
As depicted in figs. 1 and 2, loading device 1 includes horizontal loading apparatus 11, horizontal addload porous disc 12, horizontal displacement
Sensor 13, Vertical loading device 14, Vertical loading porous disc 15, vertical displacement sensor 16, loading device connector 17.
Horizontal loading apparatus 11 includes two and is located at same straight line and towards opposite loading end, horizontal loading apparatus 11
Two loading ends are connected with corresponding horizontal addload porous disc 12 respectively, and horizontal loading apparatus 11 is that horizontal addload porous disc 12 mentions
For horizontal loading forces, horizontal displacement sensors 13 are fixed in the fixing seat of horizontal loading apparatus 11, horizontal displacement sensors 13
Measure the horizontal displacement of horizontal addload porous disc 12.Two loading ends of horizontal loading apparatus 11 push two horizontal addloads permeable
Plate 12 is two-way equidistant toward hole wall movement.
The fixing seat of Vertical loading device 14 is connect with the fixing seat of horizontal loading apparatus 11, and Vertical loading device 14 adds
It carries end and connects Vertical loading porous disc 15, Vertical loading device 14 is that Vertical loading porous disc 15 provides Vertical loading power, vertically
Displacement sensor 16 is fixed in the fixing seat of Vertical loading device 14, and vertical displacement sensor 16 measures Vertical loading porous disc
15 vertical displacement.Load bar 2 is connect by loading device connector 17 with the fixing seat of horizontal loading apparatus 11.
As shown in Figure 1, the data acquisition connect bidirectional hydraulic device 3, data by hydraulic control line 10 with controller 4
Acquisition with controller 4 also by loading device control line 7 respectively with the control terminal of horizontal loading apparatus 11 and Vertical loading device
14 control terminal connection.Data acquisition passes through the loading end of 7 controlled level loading device 11 of loading device control line with controller 4
With the stretching motion of the loading end of Vertical loading device 14.
As shown in figure 3, the Vertical loading porous disc 15 is circle, the center of circle of Vertical loading porous disc 15 is provided with vertical
Straight load porous disc connector 131, Vertical loading porous disc connector 131 connect with the loading end of Vertical loading device 14, hang down
Vertical loading porous disc permeable hole 132 is uniformly distributed on straight load porous disc 15.
As shown in figure 4, the horizontal addload porous disc 12 is arc panel, the shape of the extrados of horizontal addload porous disc 12
The shape adaptation of shape and the inner wall of drilling, 12 extrados of horizontal addload porous disc are provided with vertical striped (18), horizontal addload dress
11 loading end is set to connect with the intrados of horizontal addload porous disc 12.
When horizontal loading apparatus 11 applies horizontal applied force, horizontal addload porous disc 12 is moved to hole wall, wherein horizontal
The fixing seat of loading device 11 remains stationary.Vertical loading device 14 apply active force when, Vertical loading porous disc 15 to
Bottom hole movement, wherein the fixing seat of Vertical loading device 14 remains stationary.
As shown in Figure 1, the load bearing beam 5 connects bidirectional hydraulic device 3, load bearing beam 5 passes through earth anchor 6 and ground face contact, institute
The bidirectional hydraulic device 3 stated connects load bar connector 9, and the load bar connector 9 connects load bar 2.
Data acquire and load of the controller 4 for horizontal loading apparatus 11 and Vertical loading device 14 controls and right
The reading of the data of horizontal displacement sensors 13 and vertical displacement sensor 16, so for calculate display coefficient of collapsibility and it is each to
Anisotropic coefficient.
Embodiment 2:
Coefficient of collapsibility measuring device is directly tested in the hole recorded using embodiment 1 carries out horizontal direction coefficient of collapsibility of loess
Measurement method, step include:
Bore position is chosen in step 1, place cleaning, is drilled using drilling machine drilling predetermined depth, has set up load bearing beam
5, earth anchor 6 and fixed load bearing beam 5 are squeezed at 5 both ends of load bearing beam.
Step 2, load bar 2 are connect by loading device connector 17 with the fixing seat of horizontal loading apparatus 11, two-way liquid
The loading end of depressor 3 connects load bar 2 by load bar connector 9, and data acquisition is connected with controller 4 by hydraulic control line 10
Connect the control terminal of bidirectional hydraulic device 3, data acquisition and controller 4 by loading device control line 7 respectively with horizontal loading apparatus
11 control terminal is connected with the control terminal of Vertical loading device 14.
Loading device 1 is placed the interior predetermined depth that drills by load bar 2 by step 3, and load bar 2 is located at drill center.It is logical
Two loading ends of data acquisition with 4 controlled level of controller load porous disc 12 are crossed, and then drive two horizontal addloads permeable
Plate 12 and the hole wall of drilling offset.
Step 4 applies identical original by data acquisition and two loading ends of 4 controlled level loading device 11 of controller
Position horizontal stress load, in-situ horizontal stress load load the hole wall in drilling, data acquisition by horizontal addload porous disc 12
The horizontal displacement for obtaining two horizontal addload porous discs 12 by horizontal displacement sensors 13 with controller 4, when two levels add
When variable quantity is respectively less than 0.10mm in continuous 2 hours in the horizontal displacement of load porous disc 12, it is believed that stabilization, record two
The mean value of the horizontal displacement of a horizontal addload porous disc 12, is denoted as sx。
Step 5, toward drilling in continue etc. flow water injections, observe water level, when the SEA LEVEL VARIATION rate in drilling when 2 is small interior guarantor
When holding constant, it is believed that test soil layer range has been saturated,
Applied by two loading ends of data acquisition and 4 controlled level loading device 11 of controller identical in situ horizontal
Stress load, in-situ horizontal stress load load the hole wall in drilling, data acquisition and control by horizontal addload porous disc 12
Device 4 obtains the horizontal displacement of two horizontal addload porous discs 12 by horizontal displacement sensors 13, when two horizontal addloads are permeable
When variable quantity is respectively less than 0.10mm in continuous 2 hours in the horizontal displacement of plate 12, it is believed that stabilization records two levels
The mean value for loading the horizontal displacement of porous disc 12, is denoted as s 'x。
Step 6 calculates the wet limit coefficient of horizontal direction loess: horizontal direction coefficient of collapsibility of loess δx=(s 'x-sx)/1.5Dx, Dx table
Levy soil layer influence depth, Dx=1.5 (Ax/ π)0.5, wherein Ax is the permeable plate suqare of horizontal addload, and π is pi.
Embodiment 3:
In example 2, it is tested in drilling different depth, removes soil in the soaked coverage of upper depth test point
Body repeats step 3~6 in embodiment 2 in each predetermined depth, obtains the horizontal direction coefficient of collapsibility of loess of different depth.
Embodiment 4:
Coefficient of collapsibility measuring device is directly tested in the hole recorded using embodiment 1 to carry out vertically to coefficient of collapsibility of loess
Test method, test procedure include:
Bore position is chosen in step 1, place cleaning, is drilled using drilling machine drilling predetermined depth, has set up load bearing beam
5, earth anchor 6 and fixed load bearing beam 5 are squeezed at 5 both ends of load bearing beam.
Step 2, load bar 2 are connect by loading device connector 17 with the fixing seat of horizontal loading apparatus 11, two-way liquid
The loading end of depressor 3 connects load bar 2 by load bar connector 9, and data acquisition is connected with controller 4 by hydraulic control line 10
Connect the control terminal of bidirectional hydraulic device 3, data acquisition and controller 4 by loading device control line 7 respectively with horizontal loading apparatus
11 control terminal is connected with the control terminal of Vertical loading device 14.
Loading device 1 is placed the interior predetermined depth that drills by load bar 2 by step 3, passes through data acquisition and controller 4
The loading end of Vertical loading device 14 is controlled, and then Vertical loading porous disc 15 and the bottom hole of drilling is driven to offset.
Step 4 applies vertical stress load in situ by data acquisition and the control Vertical loading device 14 of controller 4, former
Position vertical stress load loads the bottom hole in drilling by Vertical loading porous disc 15, and data acquisition passes through vertical with controller 4
Displacement sensor 16 obtains the vertical displacement of Vertical loading porous disc 15, when the vertical displacement of Vertical loading porous disc 15 is continuous
2 hours in variable quantity be less than 0.10mm when, it is believed that stabilization, record Vertical loading porous disc 15 be displaced, be denoted as sz。
Step 5, toward drilling in continue etc. flow water injections, observe water level, when the SEA LEVEL VARIATION rate in drilling when 2 is small interior guarantor
When holding constant, it is believed that test soil layer range has been saturated, and is controlled Vertical loading device 14 with controller 4 by data acquisition and is applied original
Position vertical stress load, the vertical displacement of Vertical loading porous disc 15 are thought when variable quantity is less than 0.10mm in continuous 2 hours
Stabilization records the vertical displacement of Vertical loading porous disc 15, is denoted as s 'z。
Step 6 calculates vertically to coefficient of collapsibility of loess: vertically to coefficient of collapsibility of loess δz=(s 'z-sz)/1.5Dz, Dz table
Levy soil layer influence depth, Dz=1.5 (Az/ π)0.5, wherein Az is the permeable plate suqare of Vertical loading, and π is pi.
Embodiment 5:
The each to different of coefficient of collapsibility measuring device assessment coefficient of collapsibility of loess is directly tested in the hole recorded using embodiment 1
The method of property,
First drilling and the second drilling of two same depths are drilled using identical drilling machine in Same Site, is bored for first
Hole repeats step 3~6 of embodiment 2, obtains the wet limit coefficient δ of horizontal direction loessx, second drilling repeat embodiment 4 step 3~
6, it obtains vertically to the wet limit coefficient δ of loessz, the anisotropy for defining coefficient of collapsibility of loess is η=δx/δz, different depth can obtain
Different anisotropy is obtained, is evaluated from soil depth.
Specific embodiment described herein is only to give an example to the utility model.The affiliated skill of the utility model
The technical staff in art field can make various modifications or additions to the described embodiments or substitute, but not partially
Marrow from the utility model surmounts the range defined outside the appended claims.
Claims (3)
1. directly measuring coefficient of collapsibility of loess and its anisotropic device, including data acquisition and controller in a kind of original position hole
(4), which is characterized in that it further include load bearing beam (5), load bar (2) and loading device (1),
Load bearing beam (5) is erected at drill hole, is equipped on load bearing beam (5) bidirectional hydraulic device (3), the load of bidirectional hydraulic device (3)
End is connect by load bar connector (9) with the top of load bar (2),
Loading device (1) includes horizontal loading apparatus (11), horizontal addload porous disc (12), horizontal displacement sensors (13), hangs down
Straight loading device (14), Vertical loading porous disc (15) and vertical displacement sensor (16),
Horizontal loading apparatus (11) includes two and is located at same straight line and towards opposite loading end, horizontal loading apparatus (11)
Two loading ends are connected with corresponding horizontal addload porous disc (12) respectively, for measuring the level of horizontal addload porous disc (12)
The horizontal displacement sensors (13) of displacement are fixed in the fixing seat of horizontal loading apparatus (11), and the bottom end of load bar (2) passes through
Loading device connector (17) is connect with the fixing seat of horizontal loading apparatus (11),
The fixing seat of Vertical loading device (14) is connect with the fixing seat of horizontal loading apparatus (11), Vertical loading device (14)
Loading end connects Vertical loading porous disc (15), passes for measuring the vertical displacement of vertical displacement of Vertical loading porous disc (15)
Sensor (16) is fixed in the fixing seat of Vertical loading device (14),
Data acquisition is connect bidirectional hydraulic device (3) with controller (4) by hydraulic control line (10), data acquisition and controller
(4) also by loading device control line (7) respectively with the control terminal of horizontal loading apparatus (11) and Vertical loading device (14)
Control terminal connection.
2. coefficient of collapsibility of loess and its anisotropic device are directly measured in a kind of hole in situ according to claim 1,
It is characterized in that, the Vertical loading porous disc (15) is circle, the center of circle of Vertical loading porous disc (15) is provided with vertically
It loads porous disc connector (131), the loading end of Vertical loading porous disc connector (131) and Vertical loading device (14) connects
It connects, Vertical loading porous disc permeable hole (132) is uniformly distributed on Vertical loading porous disc (15).
3. coefficient of collapsibility of loess and its anisotropic device are directly measured in a kind of hole in situ according to claim 1,
It is characterized in that, the horizontal addload porous disc (12) is arc panel, the shape of the extrados of horizontal addload porous disc (12)
With the shape adaptation of the inner wall of drilling, horizontal addload porous disc (12) extrados is provided with vertical striped (18), horizontal addload dress
The loading end for setting (11) is connect with the intrados of horizontal addload porous disc (12).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821798246.8U CN209117492U (en) | 2018-11-02 | 2018-11-02 | It is a kind of original position hole in directly measure coefficient of collapsibility of loess and its anisotropic device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821798246.8U CN209117492U (en) | 2018-11-02 | 2018-11-02 | It is a kind of original position hole in directly measure coefficient of collapsibility of loess and its anisotropic device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109238866A (en) * | 2018-11-02 | 2019-01-18 | 湖北省路桥集团有限公司 | The measurement method of the direct measuring device of coefficient of collapsibility and coefficient of collapsibility of loess in hole |
| CN114184485A (en) * | 2021-11-30 | 2022-03-15 | 长安大学 | Equipment capable of measuring loess anisotropic deformation parameters in situ in hole and use method |
-
2018
- 2018-11-02 CN CN201821798246.8U patent/CN209117492U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109238866A (en) * | 2018-11-02 | 2019-01-18 | 湖北省路桥集团有限公司 | The measurement method of the direct measuring device of coefficient of collapsibility and coefficient of collapsibility of loess in hole |
| CN109238866B (en) * | 2018-11-02 | 2024-04-26 | 湖北省路桥集团有限公司 | Direct measurement device for in-hole collapse coefficient and measurement method for loess collapse coefficient |
| CN114184485A (en) * | 2021-11-30 | 2022-03-15 | 长安大学 | Equipment capable of measuring loess anisotropic deformation parameters in situ in hole and use method |
| CN114184485B (en) * | 2021-11-30 | 2023-08-29 | 长安大学 | Equipment capable of measuring loess anisotropic deformation parameters in situ in holes and application method |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A device for directly measuring the collapsibility coefficient and anisotropy of loess in situ through boreholes Effective date of registration: 20230927 Granted publication date: 20190716 Pledgee: Industrial Bank Limited by Share Ltd. Wuhan branch Pledgor: HUBEI PROVINCIAL ROAD & BRIDGE Co.,Ltd. Registration number: Y2023980059401 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |