CN104062419B - Swelled ground vertical swelling pressure subtracts swollen effect comprehensive test device - Google Patents
Swelled ground vertical swelling pressure subtracts swollen effect comprehensive test device Download PDFInfo
- Publication number
- CN104062419B CN104062419B CN201410330506.9A CN201410330506A CN104062419B CN 104062419 B CN104062419 B CN 104062419B CN 201410330506 A CN201410330506 A CN 201410330506A CN 104062419 B CN104062419 B CN 104062419B
- Authority
- CN
- China
- Prior art keywords
- layer
- swelled ground
- bed structure
- test device
- swollen
- 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.)
- Expired - Fee Related
Links
- 230000008961 swelling Effects 0.000 title claims abstract description 29
- 238000012360 testing method Methods 0.000 title claims abstract description 29
- 239000002689 soil Substances 0.000 claims abstract description 46
- 238000001514 detection method Methods 0.000 claims abstract description 9
- 238000006073 displacement reaction Methods 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 239000004576 sand Substances 0.000 claims description 16
- 238000002347 injection Methods 0.000 claims description 15
- 239000007924 injection Substances 0.000 claims description 15
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 239000000945 filler Substances 0.000 claims description 6
- 239000004575 stone Substances 0.000 claims description 5
- 238000011160 research Methods 0.000 abstract description 8
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000004927 clay Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005213 imbibition Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a kind of swelled ground vertical swelling pressure and subtract swollen effect comprehensive test device, comprise model casing, be filled with expansion soil layer in model casing from the bottom to top successively, subtract swollen layer and foundation bed structure layer, the top of foundation bed structure layer is provided with for executing stressed force assembly and the displacement detecting assembly for measuring foundation bed structure layer deflection to foundation bed structure layer downwards, subtract between swollen layer and foundation bed structure layer and be provided with pressure detecting part, in expansion soil layer, be provided with multiple Humidity Detection parts being divided into different depth position.The present invention can test the vertical swelling pressure of different brackets swelled ground under variety classes, different-thickness and different gradation subtract swollen layer condition, and obtain this vertical swelling pressure with humidity variable quantity in expansion soil layer, Changing Pattern along swelled ground layer depth direction, thering is provided foundation for reasonably selecting to subtract swollen layer filling kind, thickness and grating, the impact of swollen layer on the bulging force of swelled ground being subtracted on research and is of great importance.
Description
Technical field
The present invention relates to civil engineering surveying technical field, be specifically related to a kind of swelled ground vertical swelling pressure and subtract swollen effect comprehensive test device.
Background technology
Swelled ground is a kind of highly plastic clay with larger imbibition and dehydration shrinkage deformation behaviour.Be built in the basis on expansive soil foundation, expansive soil slope gear a structure to bear its bulging force produced due to expansion.This bulging force even as big as having influence on basis and propping up the stable of gear structure, even makes it destroy sometimes.For this reason, except raising works self-strength, increase except works allowable transformation, the conducts such as sand stone layer also can be set between works and swelled ground and subtract swollen layer.It mainly contains the effect of two aspects: 1. reduce bulging force make it act on equably on works, improve the stress of works, thus plays and subtract swollen effect; 2. in time the moisture drainage between works and swelled ground, swelled ground water-cut variation amplitude near works can be reduced, plays the effect of loaded filter during rainy season.About the open source literature of research swelled ground bulging force has: " laying the desk research that sand bedding course reduces the swelling pressure " [J] " subgrade engineering " 02 phase in 1991 of Zhang Yingjun, 32-37 page; " research of bulging force and test method thereof " " Guangxi University's journal " (natural science edition) the 3rd phase in 1988 of Xu Jian, 60-65 page.
At present, also research does not subtract the test unit subtracting swollen effect of swollen layer reality under test conditions, is not easy to reasonably select to subtract swollen layer filler, thickness and grating etc.
Summary of the invention
The technical problem to be solved in the present invention is the deficiency overcoming prior art existence, a kind of swelled ground vertical swelling pressure is provided to subtract swollen effect comprehensive test device, this proving installation can test the vertical swelling pressure of different brackets swelled ground under variety classes, different-thickness and different gradation subtract swollen layer condition, and obtain this vertical swelling pressure with humidity variable quantity in expansion soil layer, Changing Pattern along swelled ground layer depth direction, thering is provided foundation for reasonably selecting to subtract swollen layer filling kind, thickness and grating, the impact of swollen layer on the bulging force of swelled ground being subtracted on research and is of great importance.
For solving the problems of the technologies described above, the present invention by the following technical solutions:
A kind of swelled ground vertical swelling pressure subtracts swollen effect comprehensive test device, comprise model casing, be filled with expansion soil layer in described model casing from the bottom to top successively, subtract swollen layer and foundation bed structure layer, the top of described foundation bed structure layer is provided with for executing stressed force assembly and the displacement detecting assembly for measuring described foundation bed structure layer vertical deformation to foundation bed structure layer downwards, described subtracting between swollen layer and foundation bed structure layer is provided with pressure detecting part, is provided with multiple Humidity Detection parts being divided into different depth position in described expansion soil layer.
As a further improvement on the present invention:
The reaction beam that described force assembly comprises pressing plate, lifting jack and is located on model casing, described pressing plate contacts with the upper surface of described foundation bed structure layer, and described lifting jack is installed between described reaction beam and pressing plate.
Described displacement detecting assembly is be installed in the dial gauge on described pressing plate.
Be interval with multilayer along depth direction in described expansion soil layer and ooze drainage pipeline networks, the described drainage pipeline networks that oozes comprises the sand furrow being arranged in described expansion soil layer and the pvc pipe being embedded in described sand furrow, described pvc pipe is offered porose, the pvc pipe that each layer oozes in drainage pipeline networks is all connected with water injection pipe.
Described model casing is also provided with the water injection hole be positioned at above expansion soil layer and the weep hole be positioned at bottom model casing, and each layer is oozed drainage pipeline networks and is communicated with described water injection hole by corresponding water injection pipe.
Described foundation bed structure layer is AB group filler or graded broken stone.
It is described that to subtract swollen layer be medium coarse sand packed layer.
Described pressure detecting part is soil pressure cell matching used with JMZX-5006A tester.
Described Humidity Detection parts are the matching used soil humidity sensor of FDS-100 soil humidity tester.
Compared with prior art, the invention has the advantages that: swelled ground vertical swelling pressure of the present invention subtract swollen effect comprehensive test device can study under test conditions subtract swollen layer reality subtract swollen effect, different brackets swelled ground can be tested at variety classes, different-thickness and different gradation subtract vertical swelling pressure under swollen layer condition and distortion, and obtain this vertical swelling pressure with humidity variable quantity in expansion soil layer and the Changing Pattern along swelled ground layer depth direction, swollen layer filling kind is subtracted for reasonably selecting, thickness and grating provide foundation, subtract the impact of swollen layer on the bulging force of swelled ground to research to be of great importance.
Accompanying drawing explanation
Fig. 1 is the main sectional structure simplified schematic diagram that swelled ground vertical swelling pressure of the present invention subtracts swollen effect comprehensive test device.
Marginal data:
1, model casing; 11, water injection hole; 12, weep hole; 2, expansion soil layer; 3, swollen layer is subtracted; 4, foundation bed structure layer; 5, exert a force assembly; 51, pressing plate; 52, lifting jack; 53, reaction beam; 6, pressure detecting part; 7, Humidity Detection parts; 8, dial gauge; 9, drainage pipeline networks is oozed; 10, water injection pipe.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
As shown in Figure 1, swelled ground vertical swelling pressure of the present invention subtracts swollen effect comprehensive test device, comprise model casing 1, be filled with expansion soil layer 2 in model casing 1 from the bottom to top successively, subtract swollen layer 3 and foundation bed structure layer 4, wherein, foundation bed structure layer 4 is AB group filler or graded broken stone, subtracts swollen layer 3 for medium coarse sand packed layer, to the related request of AB group filler or graded broken stone, sand bedding course during specific requirement can refer to " Design of High-speed Railway specification ".Also comprise for executing stressed force assembly 5 and the displacement detecting assembly for measuring foundation bed structure layer 4 vertical deformation to foundation bed structure layer 4 downwards, the top of foundation bed structure layer 4 is located at by force assembly 5, subtract between swollen layer 3 and foundation bed structure layer 4 and be provided with pressure detecting part 6, pressure detecting part 6 is soil pressure cell matching used with JMZX-5006A tester, soil pressure cell selects suitable model and range according to the inflation level of swelled ground, and is laid along the spacing of depth direction by testing scheme requirement by soil pressure cell.Multiple Humidity Detection parts 7 are provided with in expansion soil layer 2, multiple Humidity Detection parts 7 to be embedded in expansion soil layer 2 and to arrange along depth direction interval, can detect the humidity at expansion soil layer 2 different depth position place, Humidity Detection parts 7 are soil humidity sensor matching used with FDS-100 soil humidity tester.
In the present embodiment, the reaction beam 53 that force assembly 5 comprises pressing plate 51, lifting jack 52 and is located on model casing 1, pressing plate 51 adopt thickness be about 20mm steel plate make, it covers the upper surface of foundation bed structure layer 4 with the form directly contacted, lifting jack 52 is installed between reaction beam 53 and pressing plate 51, this lifting jack 52 is screw jack, pressing plate 51 pairs of foundation bed structure layers 4 can be made to apply downward pressure by lifting jack 52, and then the vertical dilatational strain of repression of swelling soil.Displacement detecting assembly is dial gauge 8, and dial gauge 8 is installed on pressing plate 51, and it can detect the vertical displacement amount of pressing plate 51, and then can obtain the vertical dilatational strain amount of swelled ground.
In the present embodiment, be provided with multilayer in expansion soil layer 2 and ooze drainage pipeline networks 9, multilayer oozes drainage pipeline networks 9 along depth direction interval layout, and each layer oozes drainage pipeline networks 9 and includes the sand furrow being arranged in expansion soil layer 2 and the pvc pipe being embedded in sand furrow, and pvc pipe is offered porose.Ooze drainage pipeline networks 9 specifically to insert at swelled ground in the process of model casing 1 and overlay formation, according to packing and the perviousness of expansion soil layer 2, lay in the varying level spacing of different depth, same level layer, the ditch that 5cm is wide, 5cm is dark is excavated after expansion soil layer 2 is tamped, and in ditch, fill out medium coarse sand formation sand furrow, in sand furrow, bury pvc pipe with holes underground, formed and ooze drainage pipeline networks 9.The pvc pipe that each layer oozes in drainage pipeline networks 9 is all connected with water injection pipe 10, model casing 1 is also provided with the water injection hole 11 be positioned at above expansion soil layer 2 and the weep hole 12 be positioned at bottom model casing 1, each layer is oozed drainage pipeline networks 9 and is communicated with water injection hole 11 by corresponding water injection pipe 10, to respectively oozing drainage pipeline networks 9 water filling, the water in model casing 1 can be discharged by the break-make controlling weep hole 12 by water injection hole 11.By controlling to expansion soil layer 2 intracontour waterflooding or draining, the humidity of expansion soil layer 2 can be made to change, thus cause bulging force to change, to meet testing scheme requirement.In the injecting process, observe the reading of dial gauge 8 at any time, adjust lifting jack 52 pressure when its reading changes at once, make dial gauge 8 reading return to initial reading.
In implementation process, swelled ground is inserted in model casing 1 and form expansion soil layer 2, overlay formation simultaneously and ooze drainage pipeline networks 9; Then lay medium coarse sand at expansion soil layer 2 upper surface, and vibratory compaction formation subtracts swollen layer 3; To pave certain thickness foundation bed structure layer 4 subtracting swollen layer 3 upper surface again; Finally pressing plate 51 is placed on foundation bed structure layer 4, and covers the upper surface of foundation bed structure layer 4, pressing plate 51 is installed lifting jack 52 and dial gauge 8.Above-mentioned expansion soil layer 2 can need to select the swelled ground of different brackets to fill according to test and obtain, and subtracting swollen layer 3 can select different types of filler as required, and is laid to different-thickness.
Swelled ground vertical swelling pressure of the present invention subtract swollen effect comprehensive test device can study under test conditions subtract swollen layer 3 reality subtract swollen effect, the vertical swelling pressure of different brackets swelled ground under variety classes, different-thickness and different gradation subtract swollen layer 3 condition and distortion can be tested, and obtain this vertical swelling pressure with humidity variable quantity in expansion soil layer 2 and the Changing Pattern along expansion soil layer 2 depth direction, thering is provided foundation for reasonably selecting to subtract swollen layer 3 filling kind, thickness and grating, the impact of swollen layer 3 on the bulging force of swelled ground being subtracted on research and is of great importance.This proving installation is made primarily of welded steel, and its technique is simple, be convenient to grasp; Involved components and parts and testing tool, through practical application for many years, have stable performance, feature that reliability is strong.
The above is only the preferred embodiment of the present invention, and protection scope of the present invention is also not only confined to above-described embodiment.For those skilled in the art, do not departing from the improvement that obtains under the technology of the present invention concept thereof and conversion also should be considered as protection scope of the present invention.
Claims (9)
1. a swelled ground vertical swelling pressure subtracts swollen effect comprehensive test device, it is characterized in that: comprise model casing (1), expansion soil layer (2) is filled with from the bottom to top successively in described model casing (1), subtract swollen layer (3) and foundation bed structure layer (4), the top of described foundation bed structure layer (4) is provided with for executing stressed force assembly (5) and the displacement detecting assembly for measuring described foundation bed structure layer (4) vertical deformation to foundation bed structure layer (4) downwards, described subtracting between swollen layer (3) and foundation bed structure layer (4) is provided with pressure detecting part (6), multiple Humidity Detection parts (7) being divided into different depth position are provided with in described expansion soil layer (2).
2. swelled ground vertical swelling pressure according to claim 1 subtracts swollen effect comprehensive test device, it is characterized in that: the reaction beam (53) that described force assembly (5) comprises pressing plate (51), lifting jack (52) and is located on model casing (1), described pressing plate (51) contacts with the upper surface of described foundation bed structure layer (4), and described lifting jack (52) is installed between described reaction beam (53) and pressing plate (51).
3. swelled ground vertical swelling pressure according to claim 2 subtracts swollen effect comprehensive test device, it is characterized in that: described displacement detecting assembly is for being installed in the dial gauge (8) on described pressing plate (51).
4. swelled ground vertical swelling pressure according to claim 1 subtracts swollen effect comprehensive test device, it is characterized in that: be interval with multilayer along depth direction in described expansion soil layer (2) and ooze drainage pipeline networks (9), the described drainage pipeline networks (9) that oozes comprises the sand furrow being arranged in described expansion soil layer (2) and the pvc pipe being embedded in described sand furrow, described pvc pipe is offered porose, each layer pvc pipe oozed in drainage pipeline networks (9) is all connected with water injection pipe (10).
5. swelled ground vertical swelling pressure according to claim 4 subtracts swollen effect comprehensive test device, it is characterized in that: described model casing (1) is also provided with the water injection hole (11) being positioned at expansion soil layer (2) top and the weep hole (12) being positioned at model casing (1) bottom, and each layer is oozed drainage pipeline networks (9) and is communicated with described water injection hole (11) by corresponding water injection pipe (10).
6. swelled ground vertical swelling pressure according to any one of claim 1 to 5 subtracts swollen effect comprehensive test device, it is characterized in that: described foundation bed structure layer (4) is AB group filler or graded broken stone.
7. swelled ground vertical swelling pressure according to any one of claim 1 to 5 subtracts swollen effect comprehensive test device, it is characterized in that: described in subtract swollen layer (3) for medium coarse sand packed layer.
8. swelled ground vertical swelling pressure according to any one of claim 1 to 5 subtracts swollen effect comprehensive test device, it is characterized in that: described pressure detecting part (6) is soil pressure cell matching used with JMZX-5006A tester.
9. swelled ground vertical swelling pressure according to any one of claim 1 to 5 subtracts swollen effect comprehensive test device, it is characterized in that: described Humidity Detection parts (7) are the matching used soil humidity sensor of FDS-100 soil humidity tester.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410330506.9A CN104062419B (en) | 2014-07-11 | 2014-07-11 | Swelled ground vertical swelling pressure subtracts swollen effect comprehensive test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410330506.9A CN104062419B (en) | 2014-07-11 | 2014-07-11 | Swelled ground vertical swelling pressure subtracts swollen effect comprehensive test device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104062419A CN104062419A (en) | 2014-09-24 |
| CN104062419B true CN104062419B (en) | 2016-01-20 |
Family
ID=51550226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410330506.9A Expired - Fee Related CN104062419B (en) | 2014-07-11 | 2014-07-11 | Swelled ground vertical swelling pressure subtracts swollen effect comprehensive test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104062419B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105181204B (en) * | 2015-09-08 | 2017-12-08 | 长沙理工大学 | Swelled ground lateral swelling force comprehensive test device |
| CN111735935B (en) * | 2020-07-24 | 2025-04-29 | 陕西佳维空间地理信息科技有限公司 | An in-situ testing device for swelling parameters of expansive soil |
| CN112034140B (en) * | 2020-09-21 | 2021-10-08 | 中南大学 | A device for measuring physical and mechanical parameters of unsaturated expansive soil |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2583876A1 (en) * | 1985-06-21 | 1986-12-26 | Sopena | Method and device for measuring the shear characteristics of a soil |
| JPH11200784A (en) * | 1998-01-14 | 1999-07-27 | Komatsu Ltd | Protective structure of earth pressure cell |
| CN2909257Y (en) * | 2006-05-26 | 2007-06-06 | 荆州市创联石油科技发展有限公司 | High temp, high pressure intelligent expansion performance investigator |
| CN201945541U (en) * | 2011-01-13 | 2011-08-24 | 东华理工大学 | Osmosis-expansion force coupling test device for clay |
| CN102636427A (en) * | 2012-03-26 | 2012-08-15 | 长沙理工大学 | Tester for soil vertical and radial expansive deformation and expansive force relation |
| CN102735800A (en) * | 2012-06-27 | 2012-10-17 | 兰州大学 | Measurement apparatus for swelling force change of buffer backfill material along with water absorption change, and measurement method thereof |
| CN102809641A (en) * | 2012-07-11 | 2012-12-05 | 西安理工大学 | Undisturbed soil sample expansion force testing device capable of controlling saturation |
| CN202631513U (en) * | 2012-06-27 | 2012-12-26 | 兰州大学 | Device for measuring relation of expansibility of buffering backfill material along with water absorbing capacity change |
-
2014
- 2014-07-11 CN CN201410330506.9A patent/CN104062419B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2583876A1 (en) * | 1985-06-21 | 1986-12-26 | Sopena | Method and device for measuring the shear characteristics of a soil |
| JPH11200784A (en) * | 1998-01-14 | 1999-07-27 | Komatsu Ltd | Protective structure of earth pressure cell |
| CN2909257Y (en) * | 2006-05-26 | 2007-06-06 | 荆州市创联石油科技发展有限公司 | High temp, high pressure intelligent expansion performance investigator |
| CN201945541U (en) * | 2011-01-13 | 2011-08-24 | 东华理工大学 | Osmosis-expansion force coupling test device for clay |
| CN102636427A (en) * | 2012-03-26 | 2012-08-15 | 长沙理工大学 | Tester for soil vertical and radial expansive deformation and expansive force relation |
| CN102735800A (en) * | 2012-06-27 | 2012-10-17 | 兰州大学 | Measurement apparatus for swelling force change of buffer backfill material along with water absorption change, and measurement method thereof |
| CN202631513U (en) * | 2012-06-27 | 2012-12-26 | 兰州大学 | Device for measuring relation of expansibility of buffering backfill material along with water absorbing capacity change |
| CN102809641A (en) * | 2012-07-11 | 2012-12-05 | 西安理工大学 | Undisturbed soil sample expansion force testing device capable of controlling saturation |
Non-Patent Citations (1)
| Title |
|---|
| 中－强膨胀土竖向膨胀力原位试验;王亮亮等;《铁道学报》;20140115;第36卷(第1期);第94-99页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104062419A (en) | 2014-09-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Indraratna et al. | Soft ground improvement via vertical drains and vacuum assisted preloading | |
| Zhang et al. | Stability analysis method of geogrid reinforced expansive soil slopes and its engineering application | |
| Rujikiatkamjorn et al. | 2D and 3D numerical modeling of combined surcharge and vacuum preloading with vertical drains | |
| Chai et al. | Finite element simulation of an embankment on soft clay–Case study | |
| CN104062056A (en) | Swelling soil side expansive force comprehensive testing device | |
| Cui et al. | In situ tests simulating traffic-load-induced settlement of alluvial silt subsoil | |
| Li et al. | Loose fill slope stabilization with soil nails: full-scale test | |
| Arulrajah et al. | Piezometer measurements of prefabricated vertical drain improvement of soft soils under land reclamation fill | |
| CN104452507A (en) | Construction method for filling roadbed by using wind deposited sand | |
| Alonso et al. | Modelling the response of Lechago earth and rockfill dam | |
| CN104062419B (en) | Swelled ground vertical swelling pressure subtracts swollen effect comprehensive test device | |
| Lo et al. | Long-term performance of a wide embankment on soft clay improved with prefabricated vertical drains | |
| CN113338358A (en) | Model device for measuring negative frictional resistance of pile foundation in unconsolidated soil, preparation method and test method | |
| CN112067503B (en) | Three-dimensional simulation experiment device and method for flow rule of overburden rock isolation grouting filling slurry | |
| CN101560762A (en) | Vacuum prepressing improved technical method | |
| CN219675996U (en) | A communication channel anti-inrush water test device | |
| Zhao et al. | Fully coupled hydromechanical study of tunnel excavation considering leachate leakage from a high water-level landfill | |
| CN213062128U (en) | Pile foundation static load test device suitable for expansive soil | |
| Soralump et al. | Use of geosynthetic clay liner as a remedial measure of claystone degradation in Lam Ta Khong hydropower plant | |
| Qubain et al. | Cam clay–coupled consolidation analysis of field instrumented preloading program | |
| Khattab et al. | Model test on lateral earth pressure of highly expansive soil | |
| Rahardjo et al. | Performance of geobarrier system under rainfall infiltration | |
| Indraratna | Recent advancements in the use of prefabricated vertical drains in soft soils. | |
| Gupta et al. | Moisture migration in geogrid reinforced expansive subgrades | |
| Pardsouie et al. | Numerical Investigation Impact of the Spacing between Vertical Drains on the Diameter of the Influence Zone |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160120 Termination date: 20160711 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |