CN205617450U - Test device is handled to soft base of simulation joint gas injection in vacuum - Google Patents

Test device is handled to soft base of simulation joint gas injection in vacuum Download PDF

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Publication number
CN205617450U
CN205617450U CN201620330126.XU CN201620330126U CN205617450U CN 205617450 U CN205617450 U CN 205617450U CN 201620330126 U CN201620330126 U CN 201620330126U CN 205617450 U CN205617450 U CN 205617450U
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China
Prior art keywords
gas injection
soil
test
weak soil
experimental
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CN201620330126.XU
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Chinese (zh)
Inventor
屠红珍
谢立全
杨友良
赵丁灵
叶国兴
夏来琦
方娟
范与李
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Wenzhou Traffic Technology School
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Wenzhou Traffic Technology School
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Abstract

The utility model relates to a test device is handled to soft base of simulation joint gas injection in vacuum, transparent system appearance membrane is closely laminated with experimental soil box's inside wall, the sealed experimental cavity that provides enclosed environment for experimental weak soil that forms of transparent system appearance membrane, transparent system appearance membrane is equipped with the dress soil hole and exhaust hole that is linked together with experimental cavity, in experimental cavity was arranged in to the gas injection clean shot, the gas injection pipe was linked together with the gas injection clean shot, the plastics drain bar is connected with drainage catheter in arranging experimental weak soil in, the utility model discloses an experimental soil box of transparent, the experimental soil body of transparent system appearance membrane encapsulation, can monitor the drainage effect of vacuum preloading in -process and the effect that influences behind the pressure gas injection directly perceivedly, rigidity load plate sets up in experimental weak soil top, implement vertical uniform loading, simulate different depth position's weak soil ambient stress, be particularly useful for deep soft soil foundation's simulation, can implement different vacuum preloading and pressure gas injection scheme simultaneously, thereby simulate the soft basic treatment effect of the joint gas injection in vacuum well.

Description

A kind for the treatment of of soft foundation assay device simulating vacuum combined gas injection
Technical field
This utility model relates to Soft foundation treatment technical field, more specifically, it relates to one Plant the treatment of soft foundation assay device simulating vacuum combined gas injection.
Background technology
Flourish along with coastal, city along the river's economy and capital construction, and further Urban development planning, there is the situation that land-based area land used is not enough, will dredge out in more domestic harbours Mud be used for sea reclamation or structure bunder land-based area, this has become as land development Important means.Such as 6696 kilometers of coastline, Zhejiang Province, ranks first in the country, and area 500 is flat 3061, the above island of rice, side, from " 15 " to " 13 ", seaports in Zhejiang Province economy Develop on an unprecedented scale to corresponding port engineering, coastal engineering build dynamics continue to increase, rely on port The lands used such as the facing-port industry base of mouth development, Logistics Park are filled out by enclosing, substantially so large area is dredged The consolidation process dredging reclaimed ground is particularly important.The geotechnical engineering problems relevant with barged-in fill is more Coming the most prominent, key problem is the process of the soft base of barged-in fill.
In recent years, at the beginning of the soft base processing method of vacuum combined gas injection the most gradually obtains in engineering Step application, but its treatment of soft foundation effect is affected and restriction by a large amount of factors, in it note Gas influencing mechanism and control technology the most do not recognize clear, lack the theory analysis side of practicability and effectiveness Method, has the biggest blindness in engineer applied, therefore the method is the most preferably promoted Application.For making up the limitation of theory analysis, to large-area treatment of soft foundation engineering, need knot Conjunction indoor model test is analyzed, and key control technology therein is how to simulate different depth Vacuum in soft soil foundation and gas injection coupling, and not yet find that this model test fills at present Put.
Utility model content
Defect that the purpose of this utility model is contemplated to overcome above-mentioned prior art to exist and carry For a kind of soft Ji Chu simulating vacuum combined gas injection easily realizing vacuum and gas injection coupling The assay device of reason mechanism.
For achieving the above object, this utility model provides following technical scheme:
A kind for the treatment of of soft foundation assay device simulating vacuum combined gas injection, including transparent sample preparation film, Plastic draining board, drainage duct, gas injection hollow ball, gas injection conduit, rigidity load plate and test Soil case;Described transparent sample preparation film fits tightly with the medial wall of test soil case, described transparent sample preparation Film phonograph seal is formed as testing weak soil provides the test cavity of enclosed environment;Described transparent sample preparation film sets There is the dress soil hole and steam vent being connected with test cavity, pour into mud from dress soil hole and form test Weak soil, wherein the water body of mud is drained from steam vent with gas;Described gas injection hollow ball is placed in examination Testing in cavity, described gas injection conduit is connected with gas injection hollow ball and leads to test weak soil injection pressure gas Body;Described plastic draining board is placed in test weak soil, is connected with drainage duct, leads through draining Pipe carries out vacuum preloading to test weak soil;Described rigidity load plate is arranged on test weak soil Side, implements uniform load, the weak soil ambient stress of simulation different depth position to weak soil.
This utility model is arranged further: described plastic draining board is arranged on the upper of test weak soil Layer.
This utility model is arranged further: described plastic draining board is positioned at immediately below dress soil hole, buries It is located in test weak soil.
This utility model is arranged further: described transparent sample preparation film is made by silastic material, Described test soil case is cylindric.
This utility model is arranged further: described gas injection hollow ball is arranged under test weak soil Layer.
This utility model is arranged further: described gas injection hollow ball is provided with injecting hole, described The spherome surface of gas injection hollow ball is enclosed with non-woven fabrics.
This utility model is arranged further: the uniform cloth of described injecting hole is at four points of gas injection hollow ball One of on sphere, described injecting hole is centrally disposed towards test weak soil.
Compared with prior art, this utility model is simple to operate, monitoring is convenient, has following prominent Go out advantage:
1). this utility model uses cylindric test soil case, and seals with transparent sample preparation film Dress, can monitor the shadow after the drainage effect during vacuum preloading injects with pressed gas intuitively Ring effect, and adapt to the consolidation of weak soil, sedimentation and deformation, during being beneficial to simulation vacuum preloading Soil body discharging consolidation process.
2). this utility model installs rigidity load plate at weak soil end face, it is easy to implement vertical uniform Load, the weak soil ambient stress of simulation different depth position, be particularly suited for deep soft soil foundation Simulation.
3). this utility model can implement different vacuum preloadings and pressed gas injection side simultaneously Case, thus simulate the treatment of soft foundation effect of vacuum combined gas injection well.
4). the plastic draining board model in this utility model and test length, gas injection hollow ball position Put, vacuum preloading and pressed gas injecting scheme all can adjust, as required at relative analysis base Optimal enforcement effect on plinth, result of the test can directly apply to engineering, reduces following weak soil ground Base processing cost.
Accompanying drawing explanation
Fig. 1 is a kind for the treatment of of soft foundation assay device simulating vacuum combined gas injection of this utility model Structural representation.
Fig. 2 is a kind for the treatment of of soft foundation assay device simulating vacuum combined gas injection of this utility model Plan structure schematic diagram.
Fig. 3 is gas injection conduit and the structural representation of gas injection hollow ball note.
In figure 1, soft soil foundation;2, transparent sample preparation film;3, plastic draining board;4, draining Conduit;5, gas injection hollow ball;6, gas injection conduit;7, rigidity load plate;8, steam vent; 9, test soil case;10, dress soil hole.
Detailed description of the invention
1 to Fig. 3 soft Ji Chu of simulating vacuum combined gas injection a kind of to this utility model referring to the drawings Reason assay device is described in further details.
A kind for the treatment of of soft foundation assay device simulating vacuum combined gas injection, its structure such as Fig. 1 is to figure Shown in 3, this assay device include test weak soil 1, transparent sample preparation film 2, plastic draining board 3, Drainage duct 4, gas injection hollow ball 5, gas injection conduit 6, rigidity load plate 7 and test soil case 9, Described transparent sample preparation film 2 fits tightly with the medial wall of test soil case 9, described transparent sample preparation film 2 seal the test cavity being formed as testing weak soil offer enclosed environment;Described transparent sample preparation film 2 It is provided with and tests dress soil hole 10 and the steam vent 8 that cavity is connected.
Wherein the bottom of drainage duct 4 is connected with plastic draining board 3, and the other end is with vacuum pump even Connecing, its operating principle is identical with conventional vacuum preloading method, described gas injection conduit 6 one end and gas injection Hollow ball 5 connects, and the other end is connected with air compressor machine, and air compressor machine provides constant pressed gas.
On 1/4th spheres of gas injection hollow ball 5, uniformly lay and be largely used to gas injection Pore, can be from all directions even into test weak soil 1 so that injecting gas, owing to gas injection is hollow Ball 5 is arranged on the bottom outside of test weak soil 1, so having only to four to gas injection hollow ball 5 / mono-sphere carries out injecting hole laying.
Test weak soil 1 is encapsulated in transparent sample preparation film 2, the unnecessary water body of soil body surface and gas Body is all discharged from steam vent 8, arranges long fine non-woven fabrics bottom steam vent 8, and soil particle will not Running off from this hole, after sample preparation completes, by steam vent 8 covered and enclosed, rigidity load plate 7 is installed On test weak soil 1, the upper surface of test weak soil 1 must be smooth, so that rigidity loads Plate 7 horizontal setting, vertically loading uniformly, in rigidity load plate 7, can carry out uniform load, Soft soil foundation ambient stress at simulation different depth.
Test soil case 9 is cylindric, and for transparent organic glass material, height is 3 meters, diameter It is 1.5 meters, wall thickness 20mm;Transparent sample preparation film 2 is silastic material, high transparency, thickness For 3mm;It is arranged at the steam vent 8 of transparent sample preparation film 2 upper surface, a diameter of 5mm, permissible Add a cover closing;Plastic draining board 3 is Type B, a length of 1 meter;Drainage duct 4 and gas injection are led The PE trachea that pipe 6 uses external diameter to be 4.6mm.Gas injection hollow ball 5 is steel hollow ball, outward Footpath is 5cm, wall thickness 2mm, a diameter of 0.5mm of injecting hole, arrangement pitch 5mm;Gas injection is hollow Ball 5 is with long fine non-woven wraps, it is intended to avoid earth fine grained to leak into gas injection hollow ball 5;Just Property load plate 7 be steel plate, thickness 20mm, diameter than test soil the case 9 little 5mm of internal diameter.Dress soil Hole 10 is the silicone rubber tube being connected with transparent sample preparation film 2, a diameter of 10cm;Steam vent 8 Aperture is 1cm, in order to get rid of dress soil process, soil solidifying during unnecessary water body and gas.
Its work process is as follows:
1). lay transparent sample preparation film 2 in test soil case 9 in, the two bottom surface fits tightly, and Install gas injection hollow ball 5 and gas injection conduit 6 bottom transparent sample preparation film 2 laying, open aerofluxus Hole 8, closes gas injection conduit 6;
2). according to test water content of soil needs, the configuration soil body and water in proportion, mix is uniform, Form mud;
3). by uniform for mix mud, pour into transparent sample preparation film 2 from dress soil hole 10, dress Must assure that during soil that transparent sample preparation film 2 side form face is tight with the wall laminating of test soil case 9 Close;
4). after transparent sample preparation film 2 is completely filled with the soil body, by plastic draining board 3 from dress soil hole 10 insert in the soil body, and plastic draining board 3 is embedded in weak soil completely, close dress soil hole 10;
5). in soil sample rigidity installed above load plate 7, it is ensured that it installs level, it is beneficial to vertical Load uniformly;
6). load on rigidity load plate 7 so that it is the stress state of lower earthing body and engineering Actual it is consistent;
7). the standing consolidation time of mud in transparent sample preparation film 2, it is necessary to meet the soil body and reach examination Testing the required degree of consolidation, the unnecessary water body produced during standing is discharged from steam vent 8;
8). after the weak soil in transparent sample preparation film 2 reaches test requirements document, steam vent 8 is closed, Form the weak soil experimental enviroment closed;
9). open drainage duct 4, the weak soil in transparent sample preparation film 2 is carried out vacuum preloading, And timing opening and closing gas injection conduit 6 carries out the injection of pressed gas as required;
10). test can carry out related data monitoring, with vacuum drainage amount-time graph analysis The drainage effect of gas injection, studies vacuum combined gas injection with the t curve appearing S of weak soil end face Treatment of soft foundation mechanism;
11). change plastic draining board 3 length, the installation site of gas injection hollow ball 5, change Vacuum and gas injection pressure, repeat above test, relative analysis gas injection to vacuum precompressed soft foundation at The Influencing Mechanism of reason effect, optimize plastic draining board 3 and gas injection hollow ball 5 arrangement, Vacuum and gas injection Joint Implementation scheme.
The above is only preferred implementation of the present utility model, protection model of the present utility model Enclosing and be not limited merely to above-described embodiment, all technical schemes belonged under this utility model thinking are equal Belong to protection domain of the present utility model.It should be pointed out that, the ordinary skill for the art For personnel, without departing from the some improvements and modifications under this utility model principle premise, these Improvements and modifications also should be regarded as protection domain of the present utility model.

Claims (7)

1. simulate a treatment of soft foundation assay device for vacuum combined gas injection, it is characterized in that: include transparent Sample preparation film, plastic draining board, drainage duct, gas injection hollow ball, gas injection conduit, rigidity load Plate and test soil case;
Described transparent sample preparation film fits tightly with the medial wall of test soil case, described transparent sample preparation film Seal the test cavity being formed as testing weak soil offer enclosed environment;
Described transparent sample preparation film is provided with and tests dress soil hole and the steam vent that cavity is connected, from dress Soil hole pours into mud and forms test weak soil, and wherein the water body of mud is drained from steam vent with gas;
Described gas injection hollow ball is placed in test cavity, described gas injection conduit and gas injection hollow ball phase Connect to test weak soil injection pressure gas;
Described plastic draining board is placed in test weak soil, is connected with drainage duct, leads through draining Pipe carries out vacuum preloading to test weak soil;
Described rigidity load plate is arranged at above test weak soil, and weak soil is implemented uniform load, mould Intend the weak soil ambient stress of different depth position.
A kind for the treatment of of soft foundation test dress simulating vacuum combined gas injection the most according to claim 1 Put, it is characterized in that: described plastic draining board is arranged on the upper strata of test weak soil.
A kind for the treatment of of soft foundation test dress simulating vacuum combined gas injection the most according to claim 2 Put, it is characterized in that: described plastic draining board is positioned at immediately below dress soil hole, is embedded in test weak soil In.
A kind for the treatment of of soft foundation test dress simulating vacuum combined gas injection the most according to claim 1 Put, it is characterized in that: described transparent sample preparation film is made by silastic material, described test soil case For cylindrical shape.
5. according to a kind of soft base simulating vacuum combined gas injection described in claim 1 or 2 or 3 or 4 Process assay device, it is characterized in that: described gas injection hollow ball is arranged on the lower floor of test weak soil.
A kind for the treatment of of soft foundation assay device simulating vacuum combined gas injection the most as claimed in claim 5, It is characterized in that: described gas injection hollow ball is provided with injecting hole, the spheroid of described gas injection hollow ball It is coated with non-woven fabrics.
A kind for the treatment of of soft foundation assay device simulating vacuum combined gas injection the most as claimed in claim 6, It is characterized in that: the uniform cloth of described injecting hole is on 1/4th spheres of gas injection hollow ball, described Injecting hole is centrally disposed towards test weak soil.
CN201620330126.XU 2016-04-18 2016-04-18 Test device is handled to soft base of simulation joint gas injection in vacuum Active CN205617450U (en)

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Application Number Priority Date Filing Date Title
CN201620330126.XU CN205617450U (en) 2016-04-18 2016-04-18 Test device is handled to soft base of simulation joint gas injection in vacuum

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201620330126.XU CN205617450U (en) 2016-04-18 2016-04-18 Test device is handled to soft base of simulation joint gas injection in vacuum

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105862936A (en) * 2016-04-18 2016-08-17 温州交通技术学校 Soft foundation treatment test device for stimulating vacuum joint gas injection

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105862936A (en) * 2016-04-18 2016-08-17 温州交通技术学校 Soft foundation treatment test device for stimulating vacuum joint gas injection
CN105862936B (en) * 2016-04-18 2018-02-16 温州交通技术学校 A kind for the treatment of of soft foundation experimental rig for simulating vacuum combined gas injection

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