CN103031861B - Test device for simulating six-direction load action on raft of raft base - Google Patents
Test device for simulating six-direction load action on raft of raft base Download PDFInfo
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- CN103031861B CN103031861B CN201210593959.1A CN201210593959A CN103031861B CN 103031861 B CN103031861 B CN 103031861B CN 201210593959 A CN201210593959 A CN 201210593959A CN 103031861 B CN103031861 B CN 103031861B
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Abstract
The invention relates to a test device for simulating six-direction load action on a raft of a raft base. The test device comprises a model groove, a raft base, support columns, a horizontal guide rail, a transverse beam, vertical guide rails, a four-edge platform loading framework, a vertical loading module and a horizontal loading module, wherein a soil body is arranged in the model groove; the raft base is buried in the soil body of the model groove; the support columns are arranged in the model groove; the horizontal guide rail is arranged on the support columns; the transverse beam is arranged on the horizontal guide rail; the vertical guide rail is connected with the transverse beam; the four-edge platform framework is connected to the vertical guide rail; the vertical loading module is connected to the four-edge platform framework, is connected with the raft base, and is used for applying a vertical load to the raft base; and the horizontal loading module is connected to the four-edge platform loading framework, is connected with the raft base, and is used for applying a horizontal load to the raft base. Compared with the prior art, the test device has the advantages of capability of simulation the working condition of combined loading of a plurality of loads, high simulation accuracy, and the like.
Description
Technical field
The present invention relates to a kind of model load testing machine, especially relate to a kind of experimental rig of simulating raft foundation raft plate and be subject to six direction load action.
Background technology
In recent decades, World Economics rapidly increases, and science and technology innovation constantly advances social development, and in civil construction field, performance is particularly outstanding.At present, a large amount of highrise buildings are constantly built in the whole world, and no matter, from building height, building complexity or building function, all oneself is through having entered a new developing period and stage.
So far, the highrise building of China has also obtained swift and violent development to reform and opening-up.For the object of protecting farmland, China strictly limits construction land, and utilizable construction area is more and more less, thereby has impelled the development of highrise building.Highrise building build is huge, and load is higher, and the bearing capacity of foundation soil of most areas can not meet so huge load.Because superstructure load is very high, adjacent foundation impact is large, load distribution form complexity, therefore foundation is proposed to stricter requirement.In soft clay area, adopt conventional basic most buildings all can sedimentation larger.For the highrise building having a large capacity and a wide range, reasonable selection base case, requires not only to meet technical feasibility, and will take into full account difficulty of construction and economic condition.
It is generally acknowledged, pile-raft foundation overall performance is better, has very large rigidity, and the effect of its vertical bearing capacity and adjustment differential settlement is very remarkable, in the engineering design of tall building foundation base case, is often selected in a large number.Pile-raft foundation and Upper Structure harmony are high, make structure can bear larger wind load, when earthquake, can resist larger horizontal force, have advantages of incomparable, very wide at weak soil and the high regional application prospect of earthquake protection grade.
Present stage, the form of superstructure thing becomes increasingly complex, and the environment of building periphery becomes increasingly complex, and pile-raft foundation often bears the effect of multidirectional coupling load, only considers the effect of vertical load and the design of carrying out raft foundation is irrational.For vertical, level to and moment load coupling under pile-raft foundation, Hengshan Mountain good fortune full (1981) is pointed out simple principle of superimposed stresses and is not suitable for.Therefore present stage pile-raft foundation design face two new problems: the impact of (1) multidirectional coupling load on dress raft foundation distortion.(2) impact of multidirectional coupling load on pile-raft foundation bearing capacity.For making up the limitation of theory analysis, for important engineering, need to analyze in conjunction with indoor model test, key technology is wherein the effect how analog basis is subject to multidirectional coupling load, and not yet finds the report about this problem at present.
Summary of the invention
Object of the present invention is exactly that a kind of experimental rig that can simulate multiple Load Combination loading condition, simulation raft foundation raft plate that simulation precision is high and be subject to six direction load action is provided in order to overcome the defect that above-mentioned prior art exists.
Object of the present invention can be achieved through the following technical solutions:
Simulate raft foundation raft plate and be subject to the experimental rig of six direction load action, comprising:
Model groove, is equipped with the soil body in this model groove;
Raft foundation, this raft foundation is embedded in the soil body of model groove;
Support column, this support column is installed on model groove;
Horizontal guide rail, this horizontal guide rail is installed on support column;
Crossbeam, this crossbeam is located on horizontal guide rail;
Vertical guide, this vertical guide is connected with crossbeam;
Truncated rectangular pyramids loading frame, this truncated rectangular pyramids loading frame is connected in vertical guide;
Vertical load-on module, this vertical load-on module is connected on truncated rectangular pyramids loading frame, and is connected with raft foundation, and raft foundation is applied to vertical load;
Horizontal load-on module, this horizontal load-on module is connected on truncated rectangular pyramids loading frame, and is connected with raft foundation, and raft foundation is applied to horizontal load.
Described support column is provided with four, is welded on respectively on four jiaos of model groove, between every two support columns, welds a horizontal guide rail.
Described beam-end is provided with pulley, and crossbeam is connected on horizontal guide rail slidably by this pulley.
Described vertical guide is provided with multiple bolts hole, and vertical guide is connected with crossbeam adjustably by bolt hole.
Described truncated rectangular pyramids loading frame comprises end face quadrangle and bottom surface quadrangle, and tetragonal four jiaos of end face is connected by slant edge with tetragonal four jiaos of bottom surface, and end face quadrangle is connected with vertical guide.
Described vertical load-on module comprises four groups of vertical charging assemblies, and four groups of vertical charging assemblies are symmetricly set on tetragonal two opposite side of end face.
Described vertical charging assembly comprises vertical loading actuator and vertical load bar, described vertical loading actuator is connected with end face quadrangle, one end of described vertical load bar connects the vertical actuator that loads, the other end is bolted raft foundation, vertically loads actuator and drives vertical load bar to apply vertical load to raft foundation.
Described horizontal load-on module comprises four groups of horizontal charging assemblies, every two groups of horizontal charging assemblies are connected on the tetragonal one group of opposite side in bottom surface, wherein two groups of horizontal charging assemblies apply horizontal X direction load to raft foundation, and other two groups of horizontal charging assemblies apply horizontal Y-direction load to raft foundation.
Described horizontal charging assembly comprises that two levels load actuator and horizontal load bar, and horizontal load bar connects respectively two levels and loads actuator.
Described horizontal load bar comprises mobile jib, two connecting rods and two secondary bars, described mobile jib two ends connection level respectively loads actuator, two described connecting rods are located at the two ends of mobile jib, one end of described secondary bar is connected with connecting rod, the other end is connected with raft foundation, two secondary spans are adjustable, clamp raft foundation.
Compared with prior art, the present invention has the following advantages:
1) the present invention is by arranging vertical charging assembly and horizontal charging assembly, can realize vertical, horizontal X to, the horizontal Y-direction load test of six direction altogether, break through existing experimental rig and can only carry out the restriction to unidirectional loading of vertical and level, can simulate the combination loading condition of multiple load, applied widely;
2) truncated rectangular pyramids loading frame horizontal level of the present invention is adjustable, highly also adjustable, can be good at the various situations on adaptive model basis, and simulation precision is high.
Brief description of the drawings
Fig. 1 is front view of the present invention;
Fig. 2 is top view of the present invention;
Fig. 3 is lateral view of the present invention;
Fig. 4 is horizontal load bar schematic diagram of the present invention.
In figure: 1, support column; 2, horizontal guide rail; 3, crossbeam; 4, vertical guide; 5, end face quadrangle; 6, slant edge; 7, bottom surface quadrangle; 8, vertically load actuator; 9, vertical load bar; 10, level loads actuator; 11, horizontal load bar; 12, raft foundation; 13, mobile jib; 14, connecting rod; 15, secondary bar.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.The present embodiment is implemented as prerequisite taking technical solution of the present invention, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment
As shown in Figure 1-Figure 3, a kind of experimental rig of simulating raft foundation raft plate and be subject to six direction load action, comprise model groove, raft foundation (pile-raft foundation) 12, support column 1, horizontal guide rail 2, crossbeam 3, vertical guide 4, truncated rectangular pyramids loading frame, vertical load-on module and horizontal load-on module, model groove is made up of channel-section steel skeleton and organic glass, the soil body is housed in groove, raft foundation 12 is embedded in the soil body of model groove, support column 1 is installed on model groove, horizontal guide rail 2 is installed on support column 1, crossbeam 3 is located on horizontal guide rail 2, vertical guide 4 is connected with crossbeam 3, truncated rectangular pyramids loading frame is connected in vertical guide 4, vertical load-on module is connected on truncated rectangular pyramids loading frame, and be connected with raft foundation 12, raft foundation is applied to vertical load, horizontal load-on module is connected on truncated rectangular pyramids loading frame, and be connected with raft foundation 12, raft foundation is applied to horizontal load.
Support column 1 is by H section steel manufacture welding model groove, and support column 1 is provided with four, is welded on respectively on four jiaos of model groove, between every two support columns, welds a horizontal guide rail 2, and horizontal guide rail 2 is made by channel-section steel.
Crossbeam 3 is made by channel-section steel, and its end is provided with pulley, and crossbeam 3 is connected on horizontal guide rail 2 slidably by this pulley.
Vertical guide 4 is made by channel-section steel, and establishes multiple bolts hole along channel-section steel length, and vertical guide 4 is connected with crossbeam 3 adjustably by bolt hole.
Truncated rectangular pyramids loading frame comprises end face quadrangle 5 and bottom surface quadrangle 7, and four jiaos of end face quadrangle 5 and four jiaos of bottom surface quadrangle 7 weld together by slant edge 6, and end face quadrangle 5 is connected with vertical guide 4.
Vertical load-on module comprises four groups of vertical charging assemblies, and four groups of vertical charging assemblies are symmetricly set on two opposite side of end face quadrangle 5.Vertical charging assembly comprises vertical loading actuator 8 and vertical load bar 9, the vertical actuator 8 that loads is connected with end face quadrangle 5, one end of vertical load bar 9 connects the vertical actuator 8 that loads, the other end is bolted raft foundation 12, vertically loads actuator 8 and drives vertical load bar 9 to apply vertical load to raft foundation 12.
Horizontal load-on module comprises four groups of horizontal charging assemblies, every two groups of horizontal charging assemblies are connected on the tetragonal one group of opposite side in bottom surface, wherein two groups of horizontal charging assemblies apply horizontal X direction load to raft foundation, and other two groups of horizontal charging assemblies apply horizontal Y-direction load to raft foundation.Horizontal charging assembly comprises that two levels load actuator 10 and horizontal load bar 11, and horizontal load bar 11 connects respectively two levels and loads actuator 10.As shown in Figure 4, horizontal load bar 11 comprises mobile jib 13, two connecting rods 14 and two secondary bars 15, described mobile jib 13 two ends connection level respectively loads actuator 10, two described connecting rods 15 are located at the two ends of mobile jib 13, one end of described secondary bar 15 is connected with connecting rod 14, the other end is connected with raft foundation 12, and two secondary spans are adjustable, clamps raft foundation.
As shown in Figure 1 to 4, model flute length is 3000mm, and height is 1500mm, and wide is 2000mm, is made up of channel-section steel skeleton and organic glass.Support column 1 height is 700mm, and by H section steel manufacture, flange width is 100mm, and thickness is 10mm, and web width is 100mm, and web thickness is 10mm, is arranged in isolated edge 250mm place; Horizontal guide rail 2 is made for channel-section steel, is highly 100mm, and leg width is 60mm, the thick 10mm of waist, and length is 2500mm, is welded on support column; Crossbeam 3 is made for channel-section steel, and long is highly 100mm for 2000mm, and leg width is 60mm, and the thick 20mm of waist, apart from 700mm place, two ends, on the leg of inner side, arranges respectively four bolts hole.Vertical guide 4 is made for channel-section steel, and long 800mm, is highly 100mm, and leg width is 60mm, the thick 20mm of waist, and every 80mm arranges two bolts hole along its length, that can adjust is arranged on crossbeam 3.The end face quadrangle 5 of truncated rectangular pyramids loading frame is for channel-section steel is welded, and wherein channel-section steel height is 100mm, and leg is wide is 60mm, and waist is thick is 10mm, wherein two long 600mm, and two are long is 480mm; Bottom surface quadrangle 7 is for channel-section steel is welded, and wherein channel-section steel height is 100mm, and leg is wide is 60mm, and waist is thick is 10mm, wherein two long 1200mm, and two are long is 1080; Slant edge 6 is made long 545mm for channel-section steel, and the distance of controlling between top and bottom is 450mm, is welded to connect into truncated rectangular pyramids loading frame with end face quadrangle 5 with bottom surface quadrangle 7; This truncated rectangular pyramids loading frame is connected by welding in vertical guide 4; The vertical actuator 8 that loads is welded on two opposite side of end face quadrangle 5, is 200mm from end distance, arranges altogether four; Vertical load bar 9 has just been managed for cylindrical, massive, and diameter is 5mm, long 750mm, and 20mm place, bottom arranges junction, and 2 bolts hole are set on junction, can fix with the junction at raft foundation top, and top is connected in vertical loading actuator.Level loads actuator 10 and is welded on one group of opposite side of bottom surface quadrangle 7, arranges altogether two groups, and each group is 275mm from nearest end distance.
Horizontal load bar 11 is made up of mobile jib 13, connecting rod 14, secondary bar 15, mobile jib 13 is cylindrical, massive steel pipe, diameter is 50mm, long 1400mm, secondary bar 15 is cylindrical, massive steel pipe, diameter is 50mm, long 240mm, through the tapping of connecting rod, and can move, can clamp raft foundation 12.Connecting rod 14 is divided into two kinds of sizes according to the difference of connecting rod length, is respectively used on the horizontal load bar of directions X and Y-direction.For the connecting rod H section steel manufacture of the horizontal load bar of directions X, arrange at mobile jib 13 two ends, be 160mm from mobile jib end distance, length is 210mm, the high 70mm of cross section, flange width is 50mm, thickness is 8mm, and web thickness is 8mm, and connecting rod bottom is far from the web perforate of 160mm place, top, aperture is 50mm, can pass secondary bar 15.For the connecting rod of the horizontal load bar of Y-direction, using H section steel manufacture, arrange at mobile jib 13 two ends, is 160mm from mobile jib end distance, length is 150mm, the high 70mm of cross section, flange width is 50mm, thickness is 8mm, web thickness is 8mm, connecting rod bottom is far from the web perforate of 100mm place, top, and aperture is 50mm, can pass secondary bar 15.Connecting rod 14 tops are welded on mobile jib 13, and bolt hole is offered on the edge of a wing, connecting rod bottom, can be bolted secondary bar.
Raft foundation 12 is placed in model groove, at vertical load bar 9 correspondence positions, junction is set, and two bolts hole are set on junction, and vertically load bar 9 bolts connect.
The course of work of this device: the filling test soil body in model groove, in the soil body, bury a raft model basis underground, adjust the position of crossbeam and vertical guide, four vertical load bars are connected on raft plate top surface with bolt.By outer computer control, can realize to raft foundation the multiple Load Combination operating mode of six direction load, and can instant recording load condition (load); Can collect data by measurement mechanism, the carrying on analytical model basis and deformation characteristic, and the displacement situation of pile peripheral earth generation.
Claims (10)
1. simulate raft foundation raft plate and be subject to the experimental rig of six direction load action, it is characterized in that, comprising:
Model groove, is equipped with the soil body in this model groove;
Raft foundation, this raft foundation is embedded in the soil body of model groove;
Support column, this support column is installed on model groove;
Horizontal guide rail, this horizontal guide rail is installed on support column;
Crossbeam, this crossbeam is located on horizontal guide rail;
Vertical guide, this vertical guide is connected with crossbeam;
Truncated rectangular pyramids loading frame, this truncated rectangular pyramids loading frame is connected in vertical guide;
Vertical load-on module, this vertical load-on module is connected on truncated rectangular pyramids loading frame, and is connected with raft foundation, and raft foundation is applied to vertical load;
Horizontal load-on module, this horizontal load-on module is connected on truncated rectangular pyramids loading frame, and is connected with raft foundation, and raft foundation is applied to horizontal load.
2. a kind of experimental rig of simulating raft foundation raft plate and be subject to six direction load action according to claim 1, is characterized in that, described support column is provided with four, is welded on respectively on four jiaos of model groove, between every two support columns, welds a horizontal guide rail.
3. a kind of experimental rig of simulating raft foundation raft plate and be subject to six direction load action according to claim 1, is characterized in that, described beam-end is provided with pulley, and crossbeam is connected on horizontal guide rail slidably by this pulley.
4. a kind of experimental rig of simulating raft foundation raft plate and be subject to six direction load action according to claim 1, is characterized in that, described vertical guide is provided with multiple bolts hole, and vertical guide is connected with crossbeam adjustably by bolt hole.
5. a kind of experimental rig of simulating raft foundation raft plate and be subject to six direction load action according to claim 1, it is characterized in that, described truncated rectangular pyramids loading frame comprises end face quadrangle and bottom surface quadrangle, tetragonal four jiaos of end face is connected by slant edge with tetragonal four jiaos of bottom surface, and end face quadrangle is connected with vertical guide.
6. a kind of experimental rig of simulating raft foundation raft plate and be subject to six direction load action according to claim 5, it is characterized in that, described vertical load-on module comprises four groups of vertical charging assemblies, and four groups of vertical charging assemblies are symmetricly set on tetragonal two opposite side of end face.
7. a kind of experimental rig of simulating raft foundation raft plate and be subject to six direction load action according to claim 6, it is characterized in that, described vertical charging assembly comprises vertical loading actuator and vertical load bar, described vertical loading actuator is connected with end face quadrangle, one end of described vertical load bar connects the vertical actuator that loads, the other end is bolted raft foundation, vertically loads actuator and drives vertical load bar to apply vertical load to raft foundation.
8. a kind of experimental rig of simulating raft foundation raft plate and be subject to six direction load action according to claim 5, it is characterized in that, described horizontal load-on module comprises four groups of horizontal charging assemblies, every two groups of horizontal charging assemblies are connected on the tetragonal one group of opposite side in bottom surface, wherein two groups of horizontal charging assemblies apply horizontal X direction load to raft foundation, and other two groups of horizontal charging assemblies apply horizontal Y-direction load to raft foundation.
9. a kind of experimental rig of simulating raft foundation raft plate and be subject to six direction load action according to claim 8, it is characterized in that, described horizontal charging assembly comprises that two levels load actuator and horizontal load bar, and horizontal load bar connects respectively two levels and loads actuator.
10. a kind of experimental rig of simulating raft foundation raft plate and be subject to six direction load action according to claim 9, it is characterized in that, described horizontal load bar comprises mobile jib, two connecting rods and two secondary bars, described mobile jib two ends connection level respectively loads actuator, two described connecting rods are located at the two ends of mobile jib, and one end of described secondary bar is connected with connecting rod, and the other end is connected with raft foundation, two secondary spans are adjustable, clamp raft foundation.
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| CN201210593959.1A CN103031861B (en) | 2012-12-31 | 2012-12-31 | Test device for simulating six-direction load action on raft of raft base |
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| CN105334109B (en) * | 2015-11-27 | 2017-12-12 | 中国矿业大学 | A kind of experimental rig and its test method based on electromagnetic field simulation Complicated Loads |
| CN106013279B (en) * | 2016-07-27 | 2018-11-20 | 北京金风科创风电设备有限公司 | Fan foundation test loading device and method |
| CN107313470B (en) * | 2017-06-16 | 2019-03-29 | 同济大学 | The experimental rig that the preconsolidation simulation Piled-box foundaton Long-term Cyclic Loading that pressurizes acts on |
| CN112878387B (en) * | 2021-01-05 | 2023-08-08 | 安徽省建筑科学研究设计院 | Test system and method for simulating influence of top dynamic load on pile structure performance |
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| CN102277876A (en) * | 2011-05-17 | 2011-12-14 | 石家庄铁道大学 | Multifunctional pile-raft foundation and construction process thereof |
| CN102312449A (en) * | 2010-07-02 | 2012-01-11 | 同济大学 | Simulation long board-peg work centrifugal model and test unit and method thereof |
| CN102518152A (en) * | 2011-11-18 | 2012-06-27 | 同济大学 | Test device simulating bridge pile foundation under bidirectional cyclic load effect |
| CN102568291A (en) * | 2011-12-12 | 2012-07-11 | 同济大学 | Pile foundation aided test teaching demonstration system for simulating multiple loading methods |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5383358B2 (en) * | 2009-07-10 | 2014-01-08 | 株式会社竹中工務店 | Building foundation loading test method |
| JP2012255305A (en) * | 2011-06-09 | 2012-12-27 | Takenaka Komuten Co Ltd | Foundation load testing method |
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| CN102312449A (en) * | 2010-07-02 | 2012-01-11 | 同济大学 | Simulation long board-peg work centrifugal model and test unit and method thereof |
| CN102277876A (en) * | 2011-05-17 | 2011-12-14 | 石家庄铁道大学 | Multifunctional pile-raft foundation and construction process thereof |
| CN102518152A (en) * | 2011-11-18 | 2012-06-27 | 同济大学 | Test device simulating bridge pile foundation under bidirectional cyclic load effect |
| CN102568291A (en) * | 2011-12-12 | 2012-07-11 | 同济大学 | Pile foundation aided test teaching demonstration system for simulating multiple loading methods |
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