CN108490139A - A kind of laboratory testing rig and its test method of simulation base pit engineering building enclosure random variation - Google Patents
A kind of laboratory testing rig and its test method of simulation base pit engineering building enclosure random variation Download PDFInfo
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- CN108490139A CN108490139A CN201810470936.9A CN201810470936A CN108490139A CN 108490139 A CN108490139 A CN 108490139A CN 201810470936 A CN201810470936 A CN 201810470936A CN 108490139 A CN108490139 A CN 108490139A
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- 238000012360 testing method Methods 0.000 title claims abstract description 23
- 238000004088 simulation Methods 0.000 title claims abstract description 16
- 238000010998 test method Methods 0.000 title abstract description 4
- 239000002689 soil Substances 0.000 claims abstract description 42
- 239000011435 rock Substances 0.000 claims abstract description 21
- 238000006243 chemical reaction Methods 0.000 claims abstract description 11
- 230000006378 damage Effects 0.000 claims abstract description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 80
- 239000010959 steel Substances 0.000 claims description 80
- 229910001220 stainless steel Inorganic materials 0.000 claims description 13
- 239000010935 stainless steel Substances 0.000 claims description 13
- 239000011148 porous material Substances 0.000 claims description 12
- 230000002787 reinforcement Effects 0.000 claims description 9
- 238000002474 experimental method Methods 0.000 claims description 8
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 238000013461 design Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000010425 computer drawing Methods 0.000 claims description 2
- 230000009897 systematic effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 6
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 238000009533 lab test Methods 0.000 description 2
- 101100008047 Caenorhabditis elegans cut-3 gene Proteins 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- 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 laboratory testing rigs and its test method of simulation base pit engineering building enclosure random variation, including model slot, building enclosure, combination baffle, reaction frame and data acquisition device.The experimental rig of this structure can simulate the random variation of base pit engineering building enclosure by changing baffle shapes, and the stress variation characteristic and foundation pit damage -form of Rock And Soil in foundation pit can be monitored, it can make that the experimental study of base pit engineering is more systematic, more science, while be alternatively the proposition of related foundation pit engineering theory system and being formed and reliable test basis is provided.
Description
Technical field
The present invention relates to geotechnological laboratory test field more particularly to a kind of simulation base pit engineering building enclosure random variations
Laboratory testing rig and its test method.
Background technology
With the continuous quickening of Urbanization in China, in order to solve explosive population growth backwardness opposite with urban infrastructure
Contradiction, urban construction more form Three-dimensional pattern, this also promotes the quantity of base pit engineering more and more, and form is more and more
Sample, local environment become increasingly complex, and Deformation control requirement is higher and higher, and the design of base pit engineering is converted into change from stability contorting
Shape controls, which also promotes the theory of base pit engineering finer.
Currently, the indoor model test for base pit engineering is all based on similarity principle, depanning is calculated by the likelihood ratio
The rigidity of foundation pit enclosure structure in type simulates building enclosure by selecting suitable material, and obtains to refer to by experiment
Lead conclusion or the suggestion of Practical Project.Though a certain specific engineering can be simulated and be instructed to the above method, it is unable to get with more
The conclusion of broad sense, and with the diversification of base pit engineering form and the complication of environment, the change of foundation pit enclosure structure
Shape characteristic becomes increasingly complex, and the Deformation control of base pit engineering is also increasingly stringenter, and it is different urgently to carry out foundation pit enclosure structure thus
The stress variation characteristic research of the soil body under deformation characteristic pushes base pit engineering to fine to enrich the theoretical system of base pit engineering
Change control transformation.
Such as Publication No. CN102914632A, a kind of multifunctional soil wooden mold chamber by model test box body plus
It carries and is formed with part of detecting, activity stake baffle with the components such as control section and displacement test system are moved down, utilize videographic measurment
Technology measures whole audience displacement.Can be achieved 20 kinds of piles with different away from than upper arch effect demonstrating, Piled Embankments filler particles soil arch effect
Answer and rigid foundation under composite foundation bed course effect analog experiment.Simultaneously also using the chamber carry out underground pipe stress with
The geotechnical model test device of the simulations such as deformation simulative, slope deforming, excavation of foundation pit and building enclosure stress and deformation.The technology
Foundation pit enclosure structure cannot achieve the random variation of active in scheme, and experimental condition range also suffers restraints.
Publication No. CN203949850U for another example, a kind of experimental rig of base pit engineering seepage failure evolution should
Device is mainly made of dress sample slot device, water level control slot device, data acquisition device etc..Dress sample slot is internally provided with baffle and inserts
Slot can simulate the insert depth of practical base pit engineering building enclosure to base by changing the insert depth of internal entity baffle
The seepage flow and seepage failure phenomenon for cheating bottom and surrounding soil generation, overcome in the past to that can only study soil body one dimensional fluid flow
Limitation；Change height of water level, seepage flow and seepage failure of the simulation foundation pit under different levels of ground water by water level control slot；It is right
The data that dual rotor flowmeter, head measuring device, deformation measuring device are collected are analyzed, and corresponding seepage flow is obtained
Field, stress field, deformation field.Design and construction for building enclosure in practical base pit engineering provides guidance, can also be used as ground
Engineering is used with hydraulic engineering teaching with scientific experiment.The technical solution is permeated mainly in level of ground water, the change to soil layer
Shape test is ineffective, and cannot achieve the active deformation of building enclosure.
Invention content
Present invention aim to address the deficiencies of prior art, and it is arbitrary to provide a kind of special simulation base pit engineering building enclosure
The experimental rig and its test method of Rock soil Characteristics under deformation.
The technical solution adopted by the present invention is：A kind of laboratory test dress of simulation base pit engineering building enclosure random variation
It sets, including model slot, building enclosure, combination baffle, reaction frame and data acquisition device；The model slot includes pedestal, at least
Two side steel plates and the support of at least two section steel reinforcements, the side steel plate are equipped with side steel plate groove；The building enclosure includes steel
Lath, stainless steel hinge and sealing plate are connected by stainless steel hinge between the steel plate strip, and the steel plate strip is closed around stainless steel
Page rotation, stainless steel hinge connect sealing plate close to Rock And Soil side；The combination baffle for arbitrary shape baffle combination and
At shape is determined that the baffle is positioned in the side steel plate groove of side steel plate by default building enclosure deformation；The counter-force
Frame includes shape steel bracket, jack and shaped steel vertical beam, and shaped steel vertical beam front end connects Fence structure, and its rear end connection is very heavy
Top, described jack one end connect shaped steel vertical beam, other end bolt-connected steel bracket；The data acquisition device includes soil
Pressure cell, pore pressure gauge, data collecting instrument and data terminal.
As a further improvement on the present invention, the pedestal is equipped with base groove, and side steel plate lower end is located on pedestal
In base groove, side steel plate top is welded with section steel reinforcement support.
As a further improvement of the present invention, the soil pressure cell and pore pressure gauge are located in model slot, and according to
Secondary signal connection data collecting instrument and data terminal.
The advantageous effect that the present invention uses is：The experimental rig of this structure simulates base pit engineering by changing baffle shapes
The random variation of building enclosure, and the stress variation characteristic and foundation pit damage -form of Rock And Soil in foundation pit can be monitored, base can be made
The experimental study of cheating engineering is more systematic, more science, while being alternatively the proposition and formation of related foundation pit engineering theory system
Reliable test basis is provided.
Description of the drawings
Fig. 1 is schematic diagram of the present invention.
Fig. 2 is the A-A sectional views of Fig. 1.
Fig. 3 is the B-B sectional views of Fig. 1.
Fig. 4 is the C-C sectional views of Fig. 3.
As shown in the figure：1 pedestal, 2 steel plate strips, 3 baffles, 4 shaped steel vertical beams, 5 base grooves, 6 jack, 7 shaped steel
Holder, 8 side steel plates, 9 side steel plate grooves, the support of 10 section steel reinforcements, 11 stainless steel hinges, 12 sealing plates, 13 soil pressure cells,
14 pore pressure gauges, 15 data collecting instruments, 16 data terminals.
Specific implementation mode
With reference to Fig. 1 to Fig. 4, the present invention is described further.
As shown, a kind of laboratory testing rig of simulation base pit engineering building enclosure random variation, including model slot, enclose
Protection structure, combination baffle, reaction frame and data acquisition device；
The model slot includes pedestal 1, at least two side steel plates 8 and at least two section steel reinforcements support 10, is set on the side steel plate 8
There is side steel plate groove 9；Two blocks of side steel plates, one piece of steel plate base and section steel reinforcement support are fixed as one and stablize whole, section steel reinforcement
Support is linked to be an entirety on top with side steel plate by welding, ensures the plumbness and stabilization of side steel plate.On the steel plate of side respectively
Two grooves are set, for fixing and placing building enclosure and combination baffle.
The building enclosure includes steel plate strip 2, stainless steel hinge 11 and sealing plate 12, by not between the steel plate strip 2
The steel hinge 11 that becomes rusty is connected, and the steel plate strip is rotated around stainless steel hinge 11, and stainless steel hinge 11 connects close close to Rock And Soil side
Sealing plate 12 avoids Rock And Soil from being squeezed out from stainless steel hinge 11；Ensure that building enclosure can random variation by above-mentioned technological means.
The combination baffle is that the baffle 3 of arbitrary shape is composed, and shape is determined by default building enclosure deformation,
Baffle 3 is cut by steel plate, and baffle 3 is positioned over before the test in the side steel plate groove 9 of side steel plate 8, and is located at and can arbitrarily be become
The outside of shape building enclosure；The baffle that combination baffle is differed by each shape is constituted, and can be combined into arbitrary shape.
The reaction frame includes shape steel bracket 7, jack 6 and shaped steel vertical beam 4, and 4 front end of shaped steel vertical beam connects fence
Structure, its rear end connect jack 6, and 6 one end of the jack connects shaped steel vertical beam 4, other end bolt-connected steel bracket
7；Ensure that building enclosure is in vertical state before the test.
The data acquisition device includes soil pressure cell 13, pore pressure gauge 14, data collecting instrument 15 and data terminal
16.Soil pressure cell 13, pore pressure gauge 14 are buried in the Rock And Soil sample in model slot, and the data of acquisition are acquired through data
Instrument 15 is transmitted to data terminal 16 and carries out analyzing processing.
Model slot is made of side steel plate 8 and section steel reinforcement a support 10 with groove of steel plate base 1, two with groove.
Steel plate 8 lower end in side is inserted directly into the groove of steel plate base 1, it is ensured that relative displacement, 8 top of side steel plate and two types do not occur in it
Steel strengthening support 10 is linked to be an entirety by welding, ensures the vertical of side steel plate and stablizes.
Set that there are four hydraulic synchronization jack, four hydraulic synchronizations thousand to improve the working performance of reaction frame, on reaction frame
Jin top edge vertical direction is set as two rows of, and each vertical setting of types jack front end connects a shaped steel vertical beam, and shaped steel vertical beam directly acts on
In building enclosure.Two hydraulic synchronization jack are respectively acting in three branches of building enclosure in horizontal direction.
Building enclosure according to predetermined condition coordinate combination baffle realize presupposed solution, the deformation of active control building enclosure,
It realizes active experiment, improves test effect.Laboratory testing rig using the present invention can simulate various situations, to protect in advance
The integrality of confirmatory test, controllability and comprehensive.
The Experimental Method in Laboratory of simulation base pit engineering enclosed structure random variation, including three are carried out using above-mentioned experimental rig
A stage, that is, preparation stage, experimental stage and clean-up phase,
（1）Preparation stage
First, according to preset foundation pit enclosure structure deformation characteristic, by computer drawing deformation curve, and baffle is cut 3 and is cut
At preset shape, baffle combination is got up to may make up the combination baffle of arbitrary shape, building enclosure and combination baffle are put together
Enter in the side steel plate groove 9 of side steel plate 8, wherein combination baffle is located at the outside of building enclosure.Then, the liquid on reaction frame is utilized
Synchronous jack 6 is pressed, and is acted directly in building enclosure by shaped steel vertical beam 4, it is ensured that is enclosed during banketing to model slot
Protection structure is in vertical state.Finally, by prepared Rock And Soil soil sample placement in layers to model slot, at the same it is in place
It is embedded to soil pressure cell 13 and pore pressure gauge 14, and is connected with data collecting instrument 15 and data terminal 16, Rock And Soil is filled out
It builds to designed elevation, preconsolidation is carried out to Rock And Soil.
（2）Experimental stage
After the completion of waiting for Rock And Soil preconsolidation, control hydraulic synchronization jack 6 is shunk, and building enclosure is made directly to be deformed into combination gear
On plate, default deformation occurs, while utilizing soil in soil pressure cell 13, pore pressure gauge 14 and data collecting instrument record Rock And Soil
The change procedure of pressure and pore water pressure observes the destruction characteristic of foundation pit.
（3）Clean-up phase
After off-test, the Rock And Soil in model slot is cleared up, building enclosure and combination baffle, and site clearing are extracted, under
Secondary experiment prepares.
The experimental rig of this structure simulates the random variation of base pit engineering building enclosure by changing baffle shapes, and can
The stress variation characteristic and foundation pit damage -form for monitoring Rock And Soil in foundation pit, can make the experimental study of base pit engineering more be
System, more science, while being alternatively the proposition of related foundation pit engineering theory system and being formed and reliable test basis is provided.
Those skilled in the art, can also be it is to be understood that the protection scheme of the present invention is not limited only to the above embodiments
Various permutation and combination and transformation are carried out on the basis of above-described embodiment, under the premise of without prejudice to spirit of that invention, to the present invention
The various transformation carried out are all fallen in protection scope of the present invention.
Claims (6)
1. a kind of laboratory testing rig of simulation base pit engineering building enclosure random variation, it is characterized in that including model slot, going along with sb. to guard him
Structure, combination baffle, reaction frame and data acquisition device；
The model slot includes pedestal（1）, at least two side steel plates（8）It is supportted at least two section steel reinforcements（10）, the side steel
Plate（8）It is equipped with side steel plate groove（9）；
The building enclosure includes steel plate strip（2）, stainless steel hinge（11）And sealing plate（12）, the steel plate strip（2）Between lead to
Cross stainless steel hinge（11）It is connected, the steel plate strip is around stainless steel hinge（11）Rotation, stainless steel hinge（11）Close to Rock And Soil
Side connects sealing plate（12）；
The combination baffle is the baffle of arbitrary shape（3）It is composed, shape is determined by default building enclosure deformation, institute
State baffle（3）It is positioned over side steel plate（8）Side steel plate groove（9）It is interior；
The reaction frame includes shape steel bracket（7）, jack（6）With shaped steel vertical beam（4）, the shaped steel vertical beam（4）Front end connects
Fence structure, its rear end connect jack（6）, the jack（6）One end connects shaped steel vertical beam（4）, another terminal bolt company
Direct type steel bracket（7）；
The data acquisition device includes soil pressure cell（13）, pore pressure gauge（14）, data collecting instrument（15）With data end
End（16）.
2. a kind of laboratory testing rig of simulation base pit engineering building enclosure random variation according to claim 1, special
Sign is the pedestal（1）It is equipped with base groove（5）, side steel plate（8）Lower end is located at pedestal（1）On base groove（5）It is interior, side
Steel plate（8）It is supportted with section steel reinforcement on top（10）Welding.
3. a kind of laboratory testing rig of simulation base pit engineering building enclosure random variation according to claim 1, special
Sign is that the reaction frame is set there are four hydraulic synchronization jack, and four hydraulic synchronization jack are vertically set as two
Row, each vertical setting of types hydraulic synchronization jack connect a steel vertical beam.
4. a kind of laboratory testing rig of simulation base pit engineering building enclosure random variation according to claim 3, special
Sign is horizontally oriented two hydraulic synchronization jack and is respectively acting in three branches of building enclosure.
5. a kind of interior of simulation base pit engineering building enclosure random variation as claimed in any of claims 1 to 4
Experimental rig, it is characterized in that the soil pressure cell（13）And pore pressure gauge（14）In model slot, and signal connects successively
Connect data collecting instrument（15）And data terminal（16）.
6. a kind of Experimental Method in Laboratory of simulation base pit engineering building enclosure random variation, it is characterized in that including following three ranks
Section：
1）Preparation stage
First according to preset foundation pit enclosure structure deformation characteristic, by computer drawing deformation curve；
Secondly baffle is cut into preset shape, baffle combination is got up to constitute combination baffle, by building enclosure and combination baffle
It is put into side steel plate（8）Side steel plate groove（9）It is interior；
Then the jack on reaction frame is utilized（6）And pass through shaped steel vertical beam（4）Act directly in building enclosure, it is ensured that
Building enclosure is in vertical state during model slot bankets；
Finally by prepared Rock And Soil soil sample placement in layers to model slot, while embedment soil pressure cell in place（14）
And pore pressure gauge（14）, and and data collecting instrument（15）And data terminal（16）It connects, Rock And Soil is filled to design
After absolute altitude, preconsolidation is carried out to Rock And Soil；
2）Experimental stage
After the completion of waiting for Rock And Soil preconsolidation, jack is controlled（6）It shrinks, building enclosure is made directly to be deformed on combination baffle,
Default deformation occurs；
Utilize soil pressure cell（13）, pore pressure gauge（14）And data collecting instrument（15）Record soil pressure and hole in Rock And Soil
The change procedure of water pressure observes the destruction characteristic of foundation pit；
3）Clean-up phase
The Rock And Soil in model slot is cleared up, building enclosure and combination baffle, and site clearing are extracted, is prepared for experiment next time.
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| CN201810470936.9A CN108490139A (en) | 2018-05-17 | 2018-05-17 | A kind of laboratory testing rig and its test method of simulation base pit engineering building enclosure random variation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111945697A (en) * | 2020-07-29 | 2020-11-17 | 湖南联智智能科技有限公司 | Test system and test method for steel support axial force servo system |
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