One kind infiltration gas pressure consolidation instrument
The utility model is related to a kind of infiltration gas pressure consolidation instrument.
Under the background that urbanization process is accelerated, all kinds of Large Infrastructure Projects in China coast urban area successively soft glutinous
Engineering construction is carried out in soil base, over time, various engineering problems often occurs, even results in and build (structure)
Build thing and different degrees of destruction occur.Sedimentation is the immediate cause that Geotechnical Engineering geological disaster and engineering accident occur, in engineering
Foundation settlement deformation rule is probed into practice usually by means of indoor consolidation test, consolidation apparatus is geotechnical engineering investigation soil test
Important test apparatus.
Consolidation apparatus can evaluate the consolidation and creep deformation properties of the soil body for carrying out soil mechanics compression test.It can pass through
Compression curve, calculates cake compressibility, the modulus of resilience, coefficient of consolidation of the soil body etc..The consolidation apparatus used at present mainly has two kinds：It is single
Lever consolidation apparatus and full automatic gas pressure consolidation apparatus.Simple lever consolidation apparatus is the innovation and creation seventies in last century, former using lever
Reason, passes through the artificial loading of counterweight；Full automatic gas pressure consolidation apparatus is innovation and creation at initial stage in this century, according to the principle of Pneumatic Transmission
Loading, has the advantages that convenient and swift.
Also part experts and scholars invent and design seepage consolidation instrument, (2015) are to seepage flow such as Zhou Aihong
Consolidation apparatus, which carries out transformation, can determine the infiltration coefficient and the compressed coefficient under correspondence void ratio simultaneously；Perhaps graceful (2014), Zhong Qian
Pretty (2011) Nie Liangzuo (2010) has carried out appearance design to seepage consolidation instrument；Plum pacifies (2009) to combining hyperosmosis characteristic
It has developed high-pressure permeability consolidometer.
But in engineering practice, intertidal zone (beach area) subgrade engineering, port and pier engineering, high earth-rock works and
All there is hyperosmosis, and soil body sidewise restraint and non-rigid restraint in research certain limit in the soil body of waterway engineering, be
There is certain elasticity, traditional permeability consolidometer can not truly reflect that the hydromechanical coupling of soil is made to a certain extent
With the consolidation characteristics of the lower soil body, there is the limitation of following two aspects：
(1) instrument is heavy, and floor space is larger；
(2) because the rigid constraint of cutting ring is acted on, it is impossible to truly expressed soil lateral characteristic.
Based on above-mentioned situation, necessary research and development one kind is under the conditions of flexible constraint and under hyperosmosis effect, and the soil body is solid
Tie experimental rig.
Utility model content
In view of the above-mentioned problems, the purpose of this utility model is to overcome the deficiencies in the prior art, Thief zone is born with reference to the soil body
Pressure and the characteristics of allow lateral deformation it is simple there is provided a kind of test operation, have the advantages that Consideration more comprehensively, controllability it is strong
Infiltration gas pressure consolidation instrument, infiltration gas pressure consolidation instrument of the present utility model can simulate soil body penetration field-stress field coupling
Lower Consolidation Deformation Character and lateral deformation rule.The technical solution of the utility model is as follows：
One kind infiltration gas pressure consolidation instrument, including base 5, pass through cover plate 15 of the supports support on base 5, scale water storage
Case 7, graduated cylinder 23, device for exerting and computer 6, it is characterised in that：
Base 5 is internally provided with cavity, and cavity is communicated to scale storage tank 7 by water inlet pipe 4, and with base air bleeding valve 3
Communicate, the through hole being connected with cavity is offered on the top of base 5, lower permeable stone 9 is placed in above base 5, in the He of upper dankness stone 8
Soil sample is placed between lower permeable stone 9, soil sample is placed in the soft rubber of upper and lower opening set, and upper dankness stone 8 is placed in above soil sample, is claimed
Space between upper dankness stone 8, lower permeable stone 9 and soft rubber set is soil sample balancing gate pit 12；
Described device for exerting includes pressure axle 18, the jacking 16 being placed on pressure axle 18 and the weight being placed on jacking 16
Code 17, offers for the through hole through pressure axle 18 on cover plate 15, is tightly connected, presses between cover plate 15 and pressure axle 18
Axle 18 is placed on cover plate 15, and the delivery port 22 for being connected to graduated cylinder 23 is provided with cover plate 15；
The periphery covered in soft rubber is fixed with the airbag chamber 10 for placing air bag 11, and intake valve is offered on air bag 11
1 and inlet valve 2；
Displacement meter 14 is provided with the cover board, air gauge 13 is provided with air bag 11, is provided with soft rubber set 21
Pressure sensor 20；The data that air gauge 13, displacement meter 14 and pressure sensor 20 are gathered are admitted to computer 6.
Infiltration gas pressure consolidation instrument of the present utility model is for soil body penetration Consolidation Deformation Character and soil lateral etc.
Feature and design, compared with prior art with advantages below：
(1) test apparatus is gently small, and floor space is few, loads convenient and reliable；
(2) influence of the consolidation characteristics of the soil body under the conditions of hyperosmosis can be simulated, can integrate and examine seepage field-stress field
Under coupling, weak soil pore pressure, void ratio and deformation mechanism etc.；
(3) sidewise restraint is air bag, for flexible constraint, can simulate triaxial test, realize K0Consolidate and wait to consolidation.
Brief description of the drawings
Fig. 1 is infiltration gas pressure consolidation instrument schematic diagram of structure of the present utility model.
Fig. 2 is infiltration gas pressure consolidation instrument schematic three dimensional views of the present utility model.
Fig. 3 is infiltration gas pressure consolidation instrument foil gauge of the present utility model or the signal of pressure sensor location for paste local structure
Label declaration in figure：1 intake valve；2 inlet valves；3 base air bleeding valves；4 water inlet pipes；5 bases；6 computers；7 scales
Storage tank；8 upper dankness stones；9 times permeable stones；10 airbag chambers；11 air bags；12 soil sample balancing gate pits；13 air gauges；14 displacement meters；15
Cover plate；16 jackings；17 counterweights；18 pressure axles；19 foil gauges or pressure sensor location for paste；20 foil gauges/pressure sensor；
21 soft rubber sets；22 delivery ports；23 graduated cylinders.
The utility model is illustrated with reference to the accompanying drawings and examples.
Referring to Fig. 1 and Fig. 2, the infiltration gas pressure consolidation instrument that the utility model is provided, specifically include intake valve 1, inlet valve 2,
Base air bleeding valve 3, water inlet pipe 4, base 5, computer 6, scale storage tank 7, upper dankness stone 8, lower permeable stone 9, airbag chamber 10, gas
Capsule 11, soil sample balancing gate pit 12, air gauge 13, displacement meter 14, cover plate 15, jacking 16, counterweight 17, pressure axle 18, delivery port 22, amount
Water inlet pipe 4 and the phase of base air bleeding valve 3 that infiltration gas pressure consolidation instrument base 5 is connected with water-filled scale storage tank 7
It is logical；Lower permeable stone, soil sample and upper dankness stone are sequentially placed into soil sample balancing gate pit 12 from the lower to the upper；Offered on cover plate 15
For the through hole through pressure axle 18, it is tightly connected, upper dankness stone and can moves freely between cover plate 15 and pressure axle 18
The axle 18 that presses is connected, and delivery port 22 is offered on cover plate 15, delivery port 22 is connected with graduated cylinder 23；The top of pressure axle is with being placed with
The jacking 16 of counterweight 17 is connected with displacement meter 14；Air gauge 13, displacement meter 14 and foil gauge/pressure sensor 20 are adopted by data
Storage is connected with computer 6.
Air bag applies confined pressure to soil sample balancing gate pit 12, mainly connects air bag 11 by air inlet 1, be connected pressure with air bag 11
Table 13 is controlled.Inlet valve 2 can cause air bag 11 fully to be contacted with the soil sample of soil sample balancing gate pit 12.
Referring to Fig. 3, the foil gauge of infiltration gas pressure consolidation instrument of the present utility model or pressure sensor location for paste, specific bag
Include foil gauge/pressure sensor 20, soft rubber set 21, computer 6., it is necessary to use soft rubber before soil sample balancing gate pit 12 is put into
Set 21 wraps up soil sample, and is pasting foil gauge/pressure sensor 20 thereon, and is connected by data acquisition unit with computer 6.
(1) before on-test, computer 6 is opened, and water is filled in scale storage tank 7, and records scale reading, and by soil
Sample soft rubber set 21 is entangled, and places upper dankness stone 8 and lower permeable stone 9 at it.
(2) need the air emptying of the cavity of base 5 by water inlet pipe reclaimed water, untill water occurs in base air bleeding valve 3；
(3) base air bleeding valve 3 is closed, intake valve 1 and inlet valve 2 is opened so that air bag 11 and cavity wall in airbag chamber 10
Contact, the confined pressure value that the display of pressure gauge 13 applies, can specifically be determined according to testing program；
(4) bottom of pressure axle 18 is fully contacted with upper dankness stone 8, and apply counterweight 17 on jacking 16, can basis
Testing program is specifically determined；
(5) consolidation time is determined according to earthwork test rule (SL237-1999)；
(6) off-test, should record the water yield in the unit interval, according to Darcy's law calculation permeability coefficient.
(7) after off-test, first intake valve 1 should be opened, then by counterweight 17, pressure axle 18, upper dankness stone 8, soil sample