CN102628859B - Loading frame for simulating soil pressure in laboratory - Google Patents
Loading frame for simulating soil pressure in laboratory Download PDFInfo
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- CN102628859B CN102628859B CN201210096546.2A CN201210096546A CN102628859B CN 102628859 B CN102628859 B CN 102628859B CN 201210096546 A CN201210096546 A CN 201210096546A CN 102628859 B CN102628859 B CN 102628859B
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- loading
- loading frame
- buttress brace
- wall
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- 239000002689 soil Substances 0.000 title claims abstract description 42
- 238000012360 testing method Methods 0.000 claims description 20
- 238000004088 simulation Methods 0.000 claims description 19
- 230000003014 reinforcing effect Effects 0.000 claims description 17
- 230000003993 interaction Effects 0.000 claims description 8
- 230000005484 gravity Effects 0.000 abstract description 7
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000007596 consolidation process Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Abstract
The invention provides a loading frame for simulating the soil pressure in a laboratory. The loading frame comprises a loading beam, a reinforced beam and a plurality of reinforced columns vertically connected between the loading beam and the reinforced beam, wherein a wall body is arranged between the loading beam and the reinforced beam and is provided with through holes; the reinforced columns are slidably arranged in the through holes in a penetrating manner; and the reinforced beam is connected with a loading actuator. According to the invention, the loading beam, the reinforced beam and the reinforced columns constitute a frame structure, so as to enhance the rigidity of a loading end while simulated loading is carried out on the soil pressure in the laboratory; and meanwhile, the reinforced beam and the loading beam are respectively positioned on two sides of a concrete wall and are connected through the reinforced columns, and therefore, the gravity of the loading beam can be counteracted by the reinforced beam, so that the simulated loading of the soil pressure is more accurate, and meanwhile the service life of the whole loading frame is prolonged.
Description
Technical field
The present invention relates to Analysis of Earth Pressure analogue technique field in laboratory, particularly a kind of loading frame for testing lab simulation soil pressure.
Background technology
In the process of civil engineering construction, usually to the pressure distribution in soil-structure interactions be studied, many engineerings need the problem of solution all relevant with the pressure distribution in soil layer, such as stability of slope problem, mutual effect of the pile and soil problem and bearing capacity of pile foundation problem etc.But research means common is at present for study by small-scale model test, but when there is soil-structure interactions in the object of simulating, gravity becomes one and compares the physical quantity being difficult to simulate, and gravity is the Fundamentals causing the soil body and structure stress deformation and failure, its consolidation settlement, the soil lateral pressure etc. of structure all directly to be produced by gravity.This is difficult to simulation in the model test of small scale, and this just needs the soil-structure interactions of vast scale as subjects, and is further applied load to vast scale rock-soil layer and carries out soil pressure simulation.The domestic model test loading soil pressure loading commonly small scale about soil pressure, there is not yet and carry out soil pressure simulation loading to vast scale rock soil medium at present.And vast scale rock soil medium is being carried out in the test of soil pressure simulation loading, loading frame becomes primary design problem, should consider whether the gravity of loading frame self affects the simulation to soil pressure, consider that loading frame is by whether self-deformation and cause by force unbalance during soil pressure again, therefore, the loading frame that a kind of rigidity is strong is needed.
Summary of the invention
Problem to be solved by this invention is to provide the strong loading frame for testing lab simulation soil pressure of a kind of rigidity, and this loading frame self can offset the gravity of loading end, makes the simulation of soil pressure more accurate, overcomes the above-mentioned problems in the prior art.
A kind of loading frame for testing lab simulation soil pressure of the present invention, it comprises loading beam, buttress brace and is vertically connected on many reinforcing props between loading beam and buttress brace, a body of wall is provided with between described loading beam and buttress brace, described body of wall is provided with through hole, described reinforcing prop is located in described through hole slidably, and described buttress brace is connected with loading actuator.
Buttress brace of the present invention is connected with multiple described loading actuator.
Concrete walls of the present invention are provided with multiple through hole, are provided with a described reinforcing prop in each through hole.
Loading frame of the present invention has multilayer, and the loading beam on each layer loading frame is superimposed up and down and can relative sliding.
The length of reinforcing prop of the present invention is greater than described thickness of wall body and described loading beam maximum load distance sum.
Body of wall of the present invention is concrete walls.
The present invention also comprises a counter force wall, and described loading actuator is arranged between counter force wall and buttress brace.
By above technical scheme, loading frame for testing lab simulation soil pressure of the present invention, has two advantages: loading frame is made frame form by (one), compared with bearing loading force with an independent loading beam, overall rigidity is comparatively large, is subject to the distortion after loading force less; (2) due in the process of loading beam movement under force, the frictional force that loading beam is subject to is comparatively large, and the loading frame of this structure, the buttress brace at rear by a part of gravitational equilibrium of loading beam, can reduce the frictional force that loading beam is subject to.These two advantages all can significantly improve the service life of loading frame.
Accompanying drawing explanation
Fig. 1 is the plane of loading frame of the present invention.
Fig. 2 is the installation shaft view of multilayer loading frame of the present invention.
Fig. 3 is the installation side view of multilayer loading frame of the present invention.
Fig. 4 is the axonometric drawing of concrete walls of the present invention.
In figure: 1, loading beam; 2, concrete walls; 3, buttress brace; 4, reinforcing prop;
5, actuator is loaded; 6, counter force wall.
Detailed description of the invention
As shown in Figure 1, a kind of loading frame for testing lab simulation soil pressure of the present invention, they many reinforcing props 4 comprising loading beam 1, buttress brace 3 and be vertically connected between loading beam 1 and buttress brace 3, there is between loading beam 1 and buttress brace 3 body of wall 2, body of wall 2 is provided with through hole 21 (see Fig. 4), reinforcing prop 4 slides and is located in this through hole 21, and buttress brace 3 is connected with loading actuator 5.The present invention adopts loading beam, buttress brace and reinforcing prop to form frame structure, carry out the rigidity of loading end when strengthen test is indoor carries out simulation loading to soil pressure, buttress brace in the present invention is simultaneously laid respectively at the both sides of concrete walls with loading beam and is connected by reinforcing prop, therefore, the gravity of loading beam self can be offset by buttress brace, make the simulation loading of soil pressure more accurate, improve the service life of whole loading frame simultaneously.
The present invention also comprises a counter force wall 6, is provided with multiple loading actuator 5 between counter force wall 6 and buttress brace 3, and above-mentioned buttress brace 3 is connected with multiple loading actuator 5, and uniform stressed makes the simulation loading of soil pressure more accurate.As shown in Figure 4, above-mentioned body of wall 2 is provided with multiple through hole 21, is provided with a reinforcing prop 4, enhances the rigidity of whole loading frame, make loading beam force balance, reduce the distortion of itself in each through hole 21, improves the precision of test.
Loading frame of the present invention is used in laboratory in soil pressure simulated loading system, this simulated loading system is used for the pressure layer distributed situation in simulating reality in soil-structure interactions, this simulated loading system is arranged in a test pit, above-mentioned counter force wall 6 i.e. finger to finger test hole wall, and above-mentioned body of wall 2 can be concrete walls.As shown in Figures 2 and 3, in this simulated loading system, above-mentioned loading frame has multilayer, and the loading beam about 1 on each layer loading frame is superimposed and can relative sliding.Every layer of loading frame can to the soil-structure interactions real-time loading power in test pit under the driving loading actuator 5, and all loading beams 1 form a soil pressure loading surface be further applied load to soil-structure interactions.
If the pressure be subject to due to soil layer is greater than passive earth pressure when it destroys, this soil layer will produce destruction, therefore tests the pressure size of the soil layer of lab simulation, can not exceed passive earth pressure when it destroys.Therefore the maximum load ability loading actuator 5 can calculate according to passive earth pressure during every layer of soil layer destruction.Passive earth pressure size when soil layer destroys is according to Rankine passive earth pressure formulae discovery (as follows).
Lang Ken passive earth pressure formula:
Wherein: Z is soil depth, γ is native severe, and c is the cohesive strength of soil,
for the internal friction angle of soil.
Passive earth pressure when every layer of soil layer destroys is gone out according to above formula to calculating, with this, the maximum load power that every layer loads actuator 5 is set, the buttress brace 3 of every layer is connected with loading actuator 5 in test, therefore, loading actuator 5 acts directly on buttress brace 3, buttress brace 3 passes to loading beam 1 by reinforcing prop 4 loading force, for satisfied test, the length by length of above-mentioned reinforcing prop 4 should not be less than thickness of wall body and loading beam maximum load distance sum, so that loading beam 1 enters soil-structure interactions better in fact executing loading simulation.
Above a kind of loading frame for testing lab simulation soil pressure that the embodiment of the present invention provides is described in detail; for one of ordinary skill in the art; according to the thought of the embodiment of the present invention; all can change to some extent in specific embodiments and applications; therefore this description is only used in being described the embodiment of the present invention; should not be construed as limitation of the present invention, all any changes made according to design philosophy of the present invention are all within protection scope of the present invention.
Claims (7)
1. one kind for testing the loading frame of lab simulation soil pressure, it is characterized in that, described loading frame comprises loading beam (1), buttress brace (3) and the many reinforcing props (4) be vertically connected between loading beam (1) and buttress brace (3), a body of wall (2) is provided with between described loading beam and buttress brace, described body of wall (2) is provided with through hole (21), described reinforcing prop (4) is located in described through hole slidably, described buttress brace (3) is connected with loading actuator (5), described loading actuator (5) acts on buttress brace (3), described buttress brace (3) passes to loading beam (1) by reinforcing prop (4) loading force, described loading beam is as the soil pressure loading surface be further applied load to soil-structure interactions.
2. loading frame according to claim 1, is characterized in that, described buttress brace (3) is connected with multiple described loading actuator (5).
3. loading frame according to claim 1, is characterized in that, described body of wall (2) is provided with multiple through hole (21), is provided with a described reinforcing prop (4) in each through hole (21).
4. loading frame according to claim 1, is characterized in that, described loading frame has multilayer, and the loading beam on each layer loading frame is superimposed up and down and can relative sliding.
5. loading frame according to claim 1, is characterized in that, the length of described reinforcing prop (4) is greater than described thickness of wall body and described loading beam maximum load distance sum.
6. loading frame according to claim 1, is characterized in that, described body of wall is concrete walls.
7. loading frame according to claim 1, is characterized in that, also comprises a counter force wall, and described loading actuator (5) is arranged between counter force wall and buttress brace (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210096546.2A CN102628859B (en) | 2012-04-01 | 2012-04-01 | Loading frame for simulating soil pressure in laboratory |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210096546.2A CN102628859B (en) | 2012-04-01 | 2012-04-01 | Loading frame for simulating soil pressure in laboratory |
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| Publication Number | Publication Date |
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| CN102628859A CN102628859A (en) | 2012-08-08 |
| CN102628859B true CN102628859B (en) | 2015-04-29 |
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| CN201210096546.2A Active CN102628859B (en) | 2012-04-01 | 2012-04-01 | Loading frame for simulating soil pressure in laboratory |
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| CN102866007B (en) * | 2012-09-20 | 2015-10-07 | 潍柴动力股份有限公司 | A kind of cylinder head fatigue test device and test method |
| CN107561246B (en) * | 2017-09-29 | 2020-07-14 | 中冶交通建设集团有限公司 | Landslide model test device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0925736A (en) * | 1995-07-12 | 1997-01-28 | Mitsui Constr Co Ltd | Collision alleviating structure |
| CN2589965Y (en) * | 2002-12-24 | 2003-12-03 | 中国科学院武汉岩土力学研究所 | Reaction rack equipment for precast beam (board) static load test |
| CN101042389A (en) * | 2007-04-05 | 2007-09-26 | 同济大学 | Geotechnical engineering physical simulation multifunctional tester with adjustable molded dimension |
| CN201060186Y (en) * | 2007-07-03 | 2008-05-14 | 浙江大学 | Foundation and slope engineering model testing platform |
| CN201266124Y (en) * | 2008-08-18 | 2009-07-01 | 山东大学 | Self-balancing type true three-dimensional loading model testing bench frame with sliding wall |
| CN101865800A (en) * | 2010-05-07 | 2010-10-20 | 中国科学院武汉岩土力学研究所 | Tester for testing foundation soil bearing capacity and deformation characteristic indoors and method thereof |
-
2012
- 2012-04-01 CN CN201210096546.2A patent/CN102628859B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0925736A (en) * | 1995-07-12 | 1997-01-28 | Mitsui Constr Co Ltd | Collision alleviating structure |
| CN2589965Y (en) * | 2002-12-24 | 2003-12-03 | 中国科学院武汉岩土力学研究所 | Reaction rack equipment for precast beam (board) static load test |
| CN101042389A (en) * | 2007-04-05 | 2007-09-26 | 同济大学 | Geotechnical engineering physical simulation multifunctional tester with adjustable molded dimension |
| CN201060186Y (en) * | 2007-07-03 | 2008-05-14 | 浙江大学 | Foundation and slope engineering model testing platform |
| CN201266124Y (en) * | 2008-08-18 | 2009-07-01 | 山东大学 | Self-balancing type true three-dimensional loading model testing bench frame with sliding wall |
| CN101865800A (en) * | 2010-05-07 | 2010-10-20 | 中国科学院武汉岩土力学研究所 | Tester for testing foundation soil bearing capacity and deformation characteristic indoors and method thereof |
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| CN102628859A (en) | 2012-08-08 |
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Owner name: CHINA CONSTRUCTION THIRD ENGINEERING DIVISION CO., Effective date: 20120712 |
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Effective date of registration: 20120712 Address after: 200032 Shanghai city Xuhui District Zhaojiabang Road No. 829 Applicant after: Shanghai Third Harbor Engineering Science Technology Research Institute Co., Ltd., China Communications Construction Group Co-applicant after: China Construction Third Engineering Division Co., Ltd. Address before: 200032 Shanghai city Xuhui District Zhaojiabang Road No. 829 Applicant before: Shanghai Third Harbor Engineering Science Technology Research Institute Co., Ltd., China Communications Construction Group |
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| C53 | Correction of patent for invention or patent application | ||
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Inventor after: Wu Feng Inventor after: Zhou Guoran Inventor after: Qiu Song Inventor after: Fu Yifan Inventor after: Li Xiaozhou Inventor after: Zhang Zhang Inventor before: Zhou Guoran Inventor before: Qiu Song Inventor before: Wu Feng Inventor before: Fu Yifan Inventor before: Li Xiaozhou |
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Free format text: CORRECT: INVENTOR; FROM: ZHOU GUORAN QIU SONG WU FENG FU YIFAN LI XIAOZHOU TO: WU FENG ZHOU GUORAN QIU SONG FU YIFAN LI XIAOZHOU ZHANG ZHANG |
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