CN206497110U - A kind of flexible lateral spacing consolidation device for being used to determine weak soil compression property - Google Patents
A kind of flexible lateral spacing consolidation device for being used to determine weak soil compression property Download PDFInfo
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- CN206497110U CN206497110U CN201621441798.4U CN201621441798U CN206497110U CN 206497110 U CN206497110 U CN 206497110U CN 201621441798 U CN201621441798 U CN 201621441798U CN 206497110 U CN206497110 U CN 206497110U
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- retaining ring
- soil sample
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The utility model discloses a kind of flexible lateral spacing consolidation device for being used to determine weak soil compression property, including confined pressure pressue device, the water filling device connected by upper box, rigid retaining ring, lower box, the consolidation container that rubber membrane is collectively formed and the vertical pressue device installed thereon, with hydraulic pipeline, and the data collecting system being connected with each sensor for pore water pressure, vertical displacement measuring device；Rigid retaining ring and the flexible confining pressure room of rubber membrane formation consolidation container inner chamber, and fasten to form one by high-strength bolt with upper box, lower box；Rubber membrane, which turns up, to be embedded in the groove of rigid retaining ring, and leaves gap between rigid retaining ring inwall, forms the closed cavity of flexible lateral spacing consolidation device；Soil sample top and bottom are closed by permeable stone in flexible confining pressure room, are separated between permeable stone and soil sample contact surface with filter paper, and the drainage pipeline below lower box is connected with sensor for pore water pressure.The utility model employs the measurement for waiting K stress control techniques, obtaining mechanical characteristic and pore water pressure dissipation overall process of the soil sample under the conditions of appropriate lateral deformation is allowed under the conditions of volume compression.
Description
Technical field
The utility model belongs to Geotechnical Engineering field, is related to a kind of Geotechnical Engineering experimental technique, and in particular to a kind of
The flexible lateral spacing consolidation devices of grade K for determining weak soil compression property.
Background technology
Conventional soft soil consolidation experiment is the K based on rigid lateral spacing0Concretion state, test objective is to determine soil sample in lateral spacing
With the compression curve and compressible index under axial drainage condition, to calculate the sedimentation of soil layer.
For deep saturated dredger soft soil layer, the soil body inevitably produces certain lateral in vertical consolidation process
Deformation, the rigid lateral spacing condition of above-mentioned conventional methods can not accurately obtain the practical distortion feature of the soil body, and experiment is obtained
Compressible index can not reasonably predict the compression of actual soil layer.
The content of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art there is provided one kind with due regard to the soil body can laterally become
Shape is influenceed and flexible lateral spacing consolidation device simple to operate, and soil sample can be determined in axial direction by the flexible lateral spacing consolidation device
Above mentioned problem present in draining and a small amount of lateral deformation technology of generation.
The utility model is the technical scheme adopted is that a kind of flexible lateral spacing consolidation dress for being used to determine weak soil compression property
Put, including installed on the consolidation container and consolidation container collectively formed by upper box, rigid retaining ring, lower box, rubber membrane vertical plus
Pressure device, confined pressure pressue device, the water filling device connected with hydraulic pipeline, and measured with each sensor for pore water pressure, vertical displacement
The data collecting system of device connection, the rigid retaining ring and the flexible confining pressure room of rubber membrane formation consolidation container inner chamber,
And fasten to form one by multiple high-strength bolts with upper box, lower box；Rubber membrane, which turns up, to be embedded in the groove of rigid retaining ring, and
Gap is left between rigid retaining ring inwall, the closed cavity of flexible lateral spacing consolidation device is formed；The flexible confining pressure room
Middle soil sample top and bottom are closed by permeable stone, are separated between permeable stone and soil sample contact surface with filter paper, the drainpipe below lower box
Road is connected with sensor for pore water pressure, the development of measuring deformation overall process Pore Pressure.
The flexible lateral spacing consolidation device described in the utility model for being used to determine weak soil compression property, is further characterized in that,
The rigid retaining ring outer wall both sides are symmetrically connected to triple valve, wherein side triple valve, and hydraulic pipeline is added with confined pressure
Pressure device, water filling device connection；The triple valve that opposite side is connected to, hydraulic pipeline and confined pressure pressue device and sensor for pore water pressure are connected
Connect, injected and deaerated to the closed cavity between rubber membrane and rigid retaining ring inwall by the water filling device connected with hydraulic pipeline
Water, is pressurizeed by two confined pressure connected with hydraulic pipeline pressue devices to de aerated water, by de aerated water directly to flexible lateral spacing
Soil sample applies the lateral pressure needed for experiment in balancing gate pit；The connected symmetrical dendrimer of confined pressure pressue device is set, and de aerated water is played
The effect of the even pressure of the soil sample into closed cavity；The drainage pipeline in the lower cassette bottom portion connects a sensor for pore water pressure, to measure
The pore water pressure dissipation process of soil sample in consolidation process.
The rubber film thickness is about 3 millimeters, and two ends form high on the inside of " Γ " shape flange, " Γ " the shape flange of rubber membrane
Degree and rigid retaining ring are contour, and cross-sectional diameter is identical with soil sample cross-sectional diameter in rubber membrane.
The pressurized framework of vertical pressue device is installed on above consolidation container, it is pressurized on cover to soil sample and apply uniform
Vertical pressure, the increased pressure frame is provided with vertical displacement measuring device.
The data collecting system on rigid retaining ring with sensor for pore water pressure that hydraulic pipeline is connected with being connected, to supervise
The stabilization of lateral pressure during survey specimen deformation；The hole that the data collecting system is connected with lower cassette bottom portion with drainage pipeline
Pressure sensor is connected, the dissipation to measure soil sample pore water pressure in consolidation process；The data collecting system and pressurization
The vertical displacement measuring device connection of vertical pressue device, the total deformation to measure soil sample in consolidation process above framework.
Two confined pressure pressue devices, in flexible confining pressure room, are pressurizeed using confined pressure and filled by triple valve symmetrical connection
Put to the de aerated water uniform pressurization in closed cavity body and the ratio of holding and vertical pressure is constant, to form flexible lateral spacing bar
K stress compression conditions are waited under part.
The utility model is used for the flexible lateral spacing consolidation device for determining weak soil compression property, relative to prior art, has
Following advantage and effect：
1st, the utility model employs flexible lateral spacing technology, can allow that soil sample is appropriate in consolidation process and produce lateral become
Shape, thus measures the compression property of the soil body closer to the vertical concretion state of actual hydraulic reclamation soil layer.
2nd, the utility model employ under the conditions of volume compression etc. K stress control techniques, the full mistake of specimen deformation can be measured
Mechanical characteristic and pore water pressure dissipation process in journey, can set up the settlement calculation model based on whole deformation process.
3rd, the utility model design is simple, in conventional K0The simple refit of measurement system and control system is carried out on consolidation apparatus
Just the utility model can be constituted, good control effect is can reach, and obtain metric data exactly.
Brief description of the drawings
Fig. 1, Fig. 2 are the flexible lateral spacing consolidation device structural representations that the utility model is used to determine weak soil compression property；
Fig. 3 is the utility model consolidation container structural representation；
Fig. 4 is the flexible lateral spacing consolidation pressure chamber structure sectional view of the utility model；
Fig. 5 a, Fig. 5 b are the flexible confining pressure room element structure schematic diagram of the utility model
In figure, box on 1., 2. rigid retaining rings, 2 ' grooves, 3. times boxes, 4. rubber membranes, 4 ' " Γ " shape flange, 5. consolidations are held
Device, 6. vertical pressue devices, 7. hydraulic pipelines, 8. confined pressure pressue devices, 9. water filling devices, 10. data collecting systems, 11. is soft
Property confining pressure room, 12. high-strength bolts, 13. closed cavities, 14. soil samples, 15. permeable stones, 16. filter paper, 17. drainpipes
Covered in road, 18. triple valves, 19. pressurizations, 20. sensor for pore water pressure, 21. increased pressure frames, 22. vertical displacement measuring devices.
Embodiment
The utility model is described in detail with reference to the accompanying drawings and detailed description.
A kind of flexible lateral spacing consolidation device for being used to determine weak soil compression property, as shown in Fig. 1~Fig. 4, including by upper box
The vertical pressue device 6 installed on the consolidation container 5 and consolidation container 5 that 1, rigid retaining ring 2, lower box 3, rubber membrane 4 are collectively formed,
Confined pressure pressue device 8, water filling device 9, the sensor for pore water pressure 20 being connected with hydraulic pipeline 7, and with sensor for pore water pressure 20, vertical
The data collecting system 10 that displacement measuring device 22 is connected；Rigid retaining ring 2 and the flexibility of the formation consolidation container 5 of rubber membrane 4 inner chamber
Confining pressure room 11, and one is formed by the fastening of multiple high-strength bolts 12 with upper box 1, lower box 3；Rubber membrane 4, which turns up, to be embedded in
In the groove 2 ' of rigid retaining ring 2, and gap is left between rigid retaining ring inwall, form the closing chamber of flexible lateral spacing consolidation device
Body 13；The top and bottom of soil sample 14 are closed by permeable stone 15 in flexible confining pressure room 11, between permeable stone 15 and the contact surface of soil sample 14
Separated, connected by the drainage pipeline 17 of the lower bottom of box 3 in sensor for pore water pressure 20, measurement whole deformation process in soil sample 14 with filter paper 16
The development of pore water pressure.
The outer wall both sides of rigid retaining ring 2 of the present utility model are symmetrically connected with triple valve 18, as shown in Fig. 3, wherein side three
Port valve 18, hydraulic pipeline 7 is connected with confined pressure pressue device 8, water filling device 9；The triple valve 18 that opposite side is connected to, by water-supply-pipe
Road 7 is connected with confined pressure pressue device 8 and sensor for pore water pressure 20, by the water filling device 9 that is connected with hydraulic pipeline 7 to rubber membrane
The injection de aerated water of closed cavity 13 between 4 and the rigid inwall of retaining ring 2, is pressurizeed by two confined pressures connected with hydraulic pipeline 7
Device 8 pressurizes to de aerated water, and the soil sample 14 directly into flexible confining pressure room 11 applies the lateral pressure needed for experiment；This
The connected symmetrical dendrimer of utility model confined pressure pressue device 8 is set, and de aerated water is played the uniform soil sample 14 into closed cavity 13 and is pressed
Effect；The bottom discharge pipeline 17 of lower box 3 is connected with a sensor for pore water pressure 20, the hole to measure soil sample 14 in consolidation process
Gap water pressure evanishment.
As shown in Fig. 4, Fig. 5 a, Fig. 5 b, the thickness of the utility model rubber membrane 4 is about 3 millimeters, and two ends form " Γ " shape and turned over
Side 4 ', the inside height of " Γ " shape flange 4 ' of rubber membrane 4 and rigid retaining ring 2 are contour, cross-sectional diameter and soil sample 14 in rubber membrane 4
Cross-sectional diameter is identical；After rubber membrane 4 turns up, " Γ " shape flange 4 ' is embedded in the groove 2 ' of rigid retaining ring 2, and with rigid retaining ring
Gap is left between 2 inwalls, the closed cavity 13 with flexible lateral spacing consolidation device is formed.
The pressurized framework 21 of the vertical pressue device 6 of the utility model is installed on consolidation container 5 top of box 1, it is pressurized on
Lid 19 uniformly applies vertical pressure to soil sample 14, and increased pressure frame 21 is provided with vertical displacement measuring device 22；Data collecting system
10 on rigid retaining ring 2 with sensor for pore water pressure 20 that hydraulic pipeline 7 is connected with being connected, to monitor in the deformation process of soil sample 14
The stabilization of lateral pressure；Data collecting system 10 is connected with the lower bottom of box 3 with the sensor for pore water pressure 20 that drainage pipeline 17 is connected,
Dissipation to measure the pore water pressure of soil sample 14 in consolidation process；The data collecting system 10 and the top of increased pressure frame 21
The vertical displacement measuring device 22 of vertical pressue device 6 is connected, the total deformation to measure soil sample 14 in consolidation process.
The utility model confined pressure pressue device 8, in flexible confining pressure room 11, utilizes confined pressure by triple valve symmetrical connection
Pressue device 8 is to the de aerated water uniform pressurization in the body of closed cavity 13 and the ratio of holding and vertical pressure is constant, to be formed
K stress compression conditions are waited under the conditions of flexible lateral spacing.
In addition, the experiment of the K stress conditions such as non-can also be carried out using the utility model, i.e., enclosing for de aerated water is not kept
Pressure, allows that soil sample produces more free lateral deformation in compression process, by measuring confined pressure and vertical pressure in process of the test
The change of ratio, more complicated stress change during analytical soil sample densification.
Embodiment：
The utility model is used for the flexible lateral spacing consolidation device for determining weak soil compression property in use, preparing rank in experiment
Section, the sensor for pore water pressure 20 that first the rigid outer wall side of retaining ring 2 is connected on triple valve 18 is unloaded, and only connects confined pressure pressue device
8, and by the closed cavity 13 and ft connection of consolidation container 5, can free drainage；The connection confined pressure pressurization of triple valve 18 of opposite side
Device 8 and water filling device 9, and water filling device 9 is connected with the closed cavity 13 of consolidation container 5, de- in water filling device 9
In air water injection closed cavity 13；The closed cavity 13 of consolidation container 5 is connected with confined pressure pressue device 9 again, to closed cavity
In 13 cavitys de aerated water pressurization and by the water containing gas on the rigid outer wall opposite side hydraulic pipeline 7 of retaining ring 2 three-way valve
Passage discharge outside 18 connections, so repeatedly, the bubble in extrusion closed cavity 13, and ensure the closing chamber of consolidation container 5
De aerated water is filled in body 13 completely, the sensor for pore water pressure 20 that at this moment the rigid outer wall side of retaining ring 2 is connected on triple valve 18 connects
On.
Experimental stage, after de aerated water is filled in the closed cavity 13 of consolidation container 5, by two three of the rigid outer wall of retaining ring 2
The connection of port valve 18 confined pressure pressue device 8 and closed cavity 13, by confined pressure pressue device 8 symmetrically towards de- in closed cavity 13
Air water is pressurizeed；After after confined pressure steady, the triple valve 18 of the rigid outer wall side of retaining ring 2 is connected into sensor for pore water pressure 20 and closing
Cavity 13, monitors confined pressure and keeps the ratio of lateral confined pressure and vertical pressure constant.
Applied step by step vertically by the upper lid 19 of the pressurization of vertical pressue device 6 on vertical increased pressure frame 21 by testing program
Load, the sensor for pore water pressure 20 connected by the lower bottom discharge pipeline 17 of box 3 measures pore water of the soil sample 14 in consolidation process
Pressure change, the total settlement of soil sample 14 is tested by vertical displacement measuring equipment 22 on increased pressure frame 21.
Above-mentioned embodiment is an example of the present utility model, is not intended to limit implementation and the right of utility model
Scope, equivalence changes and modification that all contents according to described in present utility model application scope of patent protection are made, all should include
In present utility model application the scope of the claims.
Claims (6)
- Be used to determining the flexible lateral spacing consolidation device of weak soil compression property 1. a kind of, including by upper box (1), rigid retaining ring (2), under The consolidation container (5) that box (3), rubber membrane (4) are collectively formed, and installed on consolidation container (5) vertical pressue device (6), with Confined pressure pressue device (8) that hydraulic pipeline (7) is connected by triple valve (18), water filling device (9), and with each sensor for pore water pressure (20), vertical displacement measuring device (22) connection data collecting system (10), it is characterised in that the rigid retaining ring (2) with The flexible confining pressure room (11) of rubber membrane (4) formation consolidation container (5) inner chamber, and with upper box (1), lower box (3) by multiple High-strength bolt (12) fastening forms one；Rubber membrane (4), which turns up, to be embedded in the groove (2 ') of rigid retaining ring (2), and with rigidity Gap is left between retaining ring inwall, the closed cavity (13) of flexible lateral spacing consolidation device is formed；The flexible confining pressure room (11) soil sample (14) top and bottom are closed by permeable stone (15) in, and filter paper (16) is used between permeable stone (15) and soil sample (14) contact surface Separate, sensor for pore water pressure (20), measuring deformation overall process Pore Pressure are connected by the drainage pipeline (17) of lower box (3) bottom Development.
- 2. the flexible lateral spacing consolidation device according to claim 1 for being used to determine weak soil compression property, it is characterised in that institute State rigid retaining ring (2) outer wall both sides and be symmetrically connected with triple valve (18), wherein side triple valve (18), by hydraulic pipeline (7) with Confined pressure pressue device (8), water filling device (9) connection；The triple valve (18) that opposite side is connected to, hydraulic pipeline (7) is added with confined pressure Pressure device (8) and sensor for pore water pressure (20) connection, by the water filling device (9) that connect with hydraulic pipeline (7) to rubber membrane (4) and Closed cavity (13) injection de aerated water between rigid retaining ring (2) inwall, is added by two confined pressures connected with hydraulic pipeline (7) Pressure device (8) pressurizes to de aerated water, and by de aerated water, soil sample (14) applies experiment institute directly into flexible confining pressure room (11) The lateral pressure needed；The connected symmetrical dendrimer of confined pressure pressue device (8) is set, and plays de aerated water uniform to flexible confining pressure room (11) effect that soil sample (14) presses in；The drainage pipeline (17) of lower box (3) bottom connects a sensor for pore water pressure (20), uses To measure the pore water pressure dissipation process of soil sample in consolidation process (14).
- 3. the flexible lateral spacing consolidation device according to claim 1 for being used to determine weak soil compression property, it is characterised in that institute It is about 3 millimeters to state rubber membrane (4) thickness, and two ends are formed in " Γ " shape flange (4 '), " Γ " the shape flange (4 ') of rubber membrane (4) Side height is contour with rigid retaining ring (2), and rubber membrane (4) interior cross-sectional diameter is identical with soil sample (14) cross-sectional diameter.
- 4. the flexible lateral spacing consolidation device according to claim 1 for being used to determine weak soil compression property, it is characterised in that：Institute State vertical pressue device (6) pressurized framework (21) to be installed on above consolidation container (5), pressurized upper cover (19) are to soil sample (14) Apply uniform vertical pressure, the increased pressure frame (21) is provided with vertical displacement measuring device (22).
- 5. the flexible lateral spacing consolidation device according to claim 1 for being used to determine weak soil compression property, it is characterised in that institute Data collecting system (10) is stated with being connected on rigid retaining ring (2) with sensor for pore water pressure (20) that hydraulic pipeline (7) is connected, use To monitor the stabilization of lateral pressure in soil sample (14) deformation process；The data collecting system (10) and lower box (3) bottom and row Sensor for pore water pressure (20) connection that waterpipe (17) is connected, to measure soil sample in consolidation process (14) pore water pressure Dissipate；The data collecting system (10) and the vertical displacement measuring device of vertical pressue device (6) above increased pressure frame (21) (22) connect, the total deformation to measure soil sample in consolidation process (14).
- 6. the flexible lateral spacing consolidation device according to claim 1 for being used to determine weak soil compression property, it is characterised in that two The individual confined pressure pressue device (8), in flexible confining pressure room (11), is pressurizeed by triple valve (18) symmetrical connection using confined pressure Device (8) passes through hydraulic pipeline (7) the de aerated water uniform pressurization internal to closed cavity (13) and the ratio of holding and vertical pressure Value is constant, and K stress compression conditions are waited to be formed under the conditions of flexible lateral spacing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621441798.4U CN206497110U (en) | 2016-12-26 | 2016-12-26 | A kind of flexible lateral spacing consolidation device for being used to determine weak soil compression property |
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| CN201621441798.4U CN206497110U (en) | 2016-12-26 | 2016-12-26 | A kind of flexible lateral spacing consolidation device for being used to determine weak soil compression property |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107632139A (en) * | 2017-10-17 | 2018-01-26 | 中交第公路勘察设计研究院有限公司 | Consider each salt marsh earth salt expansive force test device and usage to confined pressure |
| CN108871952A (en) * | 2018-06-11 | 2018-11-23 | 三峡大学 | The lateral confinement device and its application method of a kind of simulation country rock inside lining deformation condition |
| CN108871962A (en) * | 2018-04-24 | 2018-11-23 | 上海大学 | The soil sample unconfined compression test device of controllable suction |
| CN109752254A (en) * | 2019-01-29 | 2019-05-14 | 青岛理工大学 | A kind of mobile rigid boxboard leakage-proof apparatus of geotechnique's true triaxial test and method |
| CN109752252A (en) * | 2019-01-22 | 2019-05-14 | 北京交通大学 | A kind of device of triaxial apparatus high confining pressure pressure chamber sealing |
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| CN112595837A (en) * | 2021-03-03 | 2021-04-02 | 中南大学 | Consolidation apparatus |
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- 2016-12-26 CN CN201621441798.4U patent/CN206497110U/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107632139A (en) * | 2017-10-17 | 2018-01-26 | 中交第公路勘察设计研究院有限公司 | Consider each salt marsh earth salt expansive force test device and usage to confined pressure |
| CN108871962A (en) * | 2018-04-24 | 2018-11-23 | 上海大学 | The soil sample unconfined compression test device of controllable suction |
| CN108871952A (en) * | 2018-06-11 | 2018-11-23 | 三峡大学 | The lateral confinement device and its application method of a kind of simulation country rock inside lining deformation condition |
| CN108871952B (en) * | 2018-06-11 | 2020-06-30 | 三峡大学 | Lateral limiting device for simulating deformation condition of lining inside surrounding rock and using method thereof |
| CN109752252A (en) * | 2019-01-22 | 2019-05-14 | 北京交通大学 | A kind of device of triaxial apparatus high confining pressure pressure chamber sealing |
| CN109752254A (en) * | 2019-01-29 | 2019-05-14 | 青岛理工大学 | A kind of mobile rigid boxboard leakage-proof apparatus of geotechnique's true triaxial test and method |
| CN109752254B (en) * | 2019-01-29 | 2024-04-26 | 青岛理工大学 | Device and method for preventing water leakage of movable rigid box plate in geotechnical true triaxial test |
| CN110082191A (en) * | 2019-05-29 | 2019-08-02 | 海南大学 | A kind of model test soil case that novel confining pressure is controllable |
| CN111413485A (en) * | 2019-06-20 | 2020-07-14 | 中山大学 | Small hole expansion test device and method |
| CN112595837A (en) * | 2021-03-03 | 2021-04-02 | 中南大学 | Consolidation apparatus |
| CN113176161A (en) * | 2021-04-02 | 2021-07-27 | 东南大学 | Large-size coarse and loose particle resilience modulus testing device considering different depth confining pressures |
| CN117871267A (en) * | 2024-03-12 | 2024-04-12 | 西南交通大学 | Consolidation apparatus and implementation method for non-confined condition |
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