CN103031861A - 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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- CN103031861A CN103031861A CN2012105939591A CN201210593959A CN103031861A CN 103031861 A CN103031861 A CN 103031861A CN 2012105939591 A CN2012105939591 A CN 2012105939591A CN 201210593959 A CN201210593959 A CN 201210593959A CN 103031861 A CN103031861 A CN 103031861A
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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 that raft foundation raft plate is subjected to the six direction load action of simulating.
Background technology
In recent decades, World Economics rapidly increases, and the science and technology innovation constantly advances social development, and performance is particularly outstanding in the civil construction field.At present, a large amount of highrise buildings are constantly built in the whole world, no matter on building height, building complexity or building function, have all entered a new developing period and stage.
Reform and open up to the outside world so far, the highrise building of China has also obtained swift and violent development.For the purpose 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.The highrise building build is huge, and load is higher, and the bearing capacity of foundation soil of most areas can not satisfy so huge load.Because the superstructure load is very high, the adjacent foundation impact is large, the load distribution form is complicated, therefore foundation has been proposed stricter requirement.In soft clay area, adopt conventional basic most buildings all can sedimentation larger.For the highrise building that has a large capacity and a wide range, the reasonable selection base case requires not only will satisfy technical feasibility, and will take into full account difficulty of construction and economic condition.
It is generally acknowledged that the pile-raft foundation overall performance is better, have very large rigidity, the effect of its vertical bearing capacity and adjustment differential settlement is very remarkable, is often selected in a large number in the engineering design of tall building foundation base case.Pile-raft foundation and Upper Structure harmony are high, so that structure can be born larger wind load, can resist larger horizontal force during earthquake, have incomparable advantage, and is very wide in the regional application prospect that weak soil and earthquake protection grade are high.
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 the moment load coupling under pile-raft foundation, Hengshan Mountain fortunately 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: (1) multidirectional coupling load is on the impact of dress raft foundation distortion.(2) multidirectional coupling load is on the impact of pile-raft foundation bearing capacity.For remedying the limitation of theory analysis, for important engineering, need to analyze in conjunction with indoor model test, key technology wherein is the effect how analog basis is subjected to multidirectional coupling load, and not yet finds at present the report of relevant this problem.
Summary of the invention
Purpose of the present invention is exactly to provide a kind of can simulate the experimental rig that multiple Load Combination loading condition, simulation raft foundation raft plate that simulation precision is high are subjected to the six direction load action in order to overcome the defective that above-mentioned prior art exists.
Purpose of the present invention can be achieved through the following technical solutions:
A kind ofly simulate the experimental rig that raft foundation raft plate is subjected to the six direction load action, comprising:
The model groove is equipped with the soil body in this model groove;
Raft foundation, this raft foundation are embedded in the soil body of model groove;
Support column, this support column are installed on the model groove;
Horizontal guide rail, this horizontal guide rail is installed on the support column;
Crossbeam, this crossbeam is located on the horizontal guide rail;
Vertical guide, this vertical guide is connected with crossbeam;
The truncated rectangular pyramids loading frame, this loading truncated rectangular pyramids framework is connected on the vertical guide;
Vertical load-on module, this vertical load-on module is connected on the truncated rectangular pyramids loading frame, and is connected with raft foundation, and raft foundation is applied vertical load;
Horizontal load-on module, this horizontal load-on module is connected on the truncated rectangular pyramids loading frame, and is connected with raft foundation, and raft foundation is applied horizontal load.
Described support column is provided with four, is welded on respectively on four jiaos of model groove horizontal guide rail of welding between per two support columns.
Described beam-end is provided with pulley, and crossbeam is connected on the horizontal guide rail slidably by this pulley.
Described vertical guide is provided with a plurality of 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, end face tetragonal four jiaos be connected with the bottom surface four jiaos connect by slant edge, the 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 the 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 raft foundation is applied vertical load.
Described horizontal load-on module comprises four groups of horizontal charging assemblies, per 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, respectively connection level of described mobile jib two ends loads actuator, described two 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 that vertical, horizontal X is to, the horizontal Y-direction load test of six direction altogether, break through existing experimental rig and can only carry out vertical and level to the restriction of unidirectional loading, 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.
Description of 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.
Among the 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.
The specific embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments.Present embodiment is implemented as prerequisite take 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 ofly simulate the experimental rig that raft foundation raft plate is subjected to the six direction load action, comprise the model groove, raft foundation (pile-raft foundation) 12, support column 1, horizontal guide rail 2, crossbeam 3, vertical guide 4, the truncated rectangular pyramids loading frame, vertical load-on module and horizontal load-on module, the model groove is made of channel-section steel skeleton and organic glass, the soil body is housed in the groove, raft foundation 12 is embedded in the soil body of model groove, support column 1 is installed on the model groove, horizontal guide rail 2 is installed on the support column 1, crossbeam 3 is located on the horizontal guide rail 2, vertical guide 4 is connected with crossbeam 3, loading the truncated rectangular pyramids framework is connected on the vertical guide 4, vertical load-on module is connected on the truncated rectangular pyramids loading frame, and be connected with raft foundation 12, raft foundation is applied vertical load, horizontal load-on module is connected on the truncated rectangular pyramids loading frame, and be connected with raft foundation 12, raft foundation is applied horizontal load.
Support column 1 is by on H section steel manufacture and the welding model groove, and support column 1 is provided with four, be welded on respectively on four jiaos of model groove, and horizontal guide rail 2 of welding between per two support columns, 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 the horizontal guide rail 2 slidably by this pulley.
The truncated rectangular pyramids loading frame comprises end face quadrangle 5 and bottom surface quadrangle 7, and four jiaos of end face quadrangle 5 and bottom surface quadrangle 7 four jiaos 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 9 pairs of raft foundations 12 of the actuator 8 vertical load bars of drive and applies vertical load.
Horizontal load-on module comprises four groups of horizontal charging assemblies, per 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, respectively connection level of described mobile jib 13 two ends loads actuator 10, described two 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.
Such as Fig. 1～shown in Figure 4, the model flute length is 3000mm, and height is 1500mm, and wide is 2000mm, is made of channel-section steel skeleton and organic glass.Support column 1 height is 700mm, and by the 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, highly is 100mm, and the leg width is 60mm, the thick 10mm of waist, and length is 2500mm, is welded on the support column; Crossbeam 3 is made for channel-section steel, and long highly is 100mm for 2000mm, and the leg width is 60mm, and the thick 20mm of waist at 700mm place, distance two ends, on interior survey leg, arranges respectively four bolts hole.Vertical guide 4 is made for channel-section steel, and long 800mm highly is 100mm, and the leg width is 60mm, the thick 20mm of waist, and every 80mm arranges two bolts hole along its length, that can adjust is installed on the crossbeam 3.The end face quadrangle 5 of truncated rectangular pyramids loading frame is for channel-section steel is welded, and wherein the channel-section steel height is 100mm, and leg is wide to be 60mm, and waist is thick to be 10mm, two long 600mm wherein, and two are long is 480mm; Bottom surface quadrangle 7 is for channel-section steel is welded, and wherein the channel-section steel height is 100mm, and leg is wide to be 60mm, and waist is thick to be 10mm, two long 1200mm wherein, and two are long is 1080; Slanting 6 is made long 545mm for channel-section steel, and the distance between the control top and bottom is 450mm, is welded to connect into the 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 on the vertical guide 4; The vertical actuator 8 that loads is welded on two opposite side of end face quadrangle 5, is 200mm from the 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 in bottom arranges the junction, and 2 bolts hole are set on the junction, can fix with the junction at raft foundation top, and top is connected on the 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.
The course of work of this device: the soil body is used in the filling test in the model groove, buries a raft model basis in the soil body underground, adjusts the position of crossbeam and vertical guide, and four vertical load bars are connected on the 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, but and 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 the experimental rig that raft foundation raft plate is subjected to the six direction load action for one kind, it is characterized in that, comprising:
The model groove is equipped with the soil body in this model groove;
Raft foundation, this raft foundation are embedded in the soil body of model groove;
Support column, this support column are installed on the model groove;
Horizontal guide rail, this horizontal guide rail is installed on the support column;
Crossbeam, this crossbeam is located on the horizontal guide rail;
Vertical guide, this vertical guide is connected with crossbeam;
The truncated rectangular pyramids loading frame, this loading truncated rectangular pyramids framework is connected on the vertical guide;
Vertical load-on module, this vertical load-on module is connected on the truncated rectangular pyramids loading frame, and is connected with raft foundation, and raft foundation is applied vertical load;
Horizontal load-on module, this horizontal load-on module is connected on the truncated rectangular pyramids loading frame, and is connected with raft foundation, and raft foundation is applied horizontal load.
2. a kind of experimental rig that raft foundation raft plate is subjected to the six direction load action of simulating 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 horizontal guide rail of welding between per two support columns.
3. a kind of experimental rig that raft foundation raft plate is subjected to the six direction load action of simulating according to claim 1 is characterized in that described beam-end is provided with pulley, and crossbeam is connected on the horizontal guide rail slidably by this pulley.
4. a kind of experimental rig that raft foundation raft plate is subjected to the six direction load action of simulating according to claim 1 is characterized in that described vertical guide is provided with a plurality of bolts hole, and vertical guide is connected with crossbeam adjustably by bolt hole.
5. a kind of experimental rig that raft foundation raft plate is subjected to the six direction load action of simulating according to claim 1, it is characterized in that, described truncated rectangular pyramids loading frame comprises end face quadrangle and bottom surface quadrangle, end face tetragonal four jiaos be connected with the bottom surface four jiaos connect by slant edge, the end face quadrangle is connected with vertical guide.
6. a kind of experimental rig that raft foundation raft plate is subjected to the six direction load action of simulating 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 that raft foundation raft plate is subjected to the six direction load action of simulating 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 the 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 raft foundation is applied vertical load.
8. a kind of experimental rig that raft foundation raft plate is subjected to the six direction load action of simulating according to claim 5, it is characterized in that, described horizontal load-on module comprises four groups of horizontal charging assemblies, per 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 that raft foundation raft plate is subjected to the six direction load action of simulating 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 that raft foundation raft plate is subjected to the six direction load action of simulating according to claim 9, it is characterized in that, described horizontal load bar comprises mobile jib, two connecting rods and two secondary bars, respectively connection level of described mobile jib two ends loads actuator, described two connecting rods are located at the two ends of mobile jib, and an 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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| Application Number | Priority Date | Filing Date | Title |
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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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| 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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| CN103031861B CN103031861B (en) | 2014-12-10 |
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| CN106013279A (en) * | 2016-07-27 | 2016-10-12 | 北京金风科创风电设备有限公司 | Fan foundation test loading device and method |
| CN107313470A (en) * | 2017-06-16 | 2017-11-03 | 同济大学 | The experimental rig that the preconsolidation simulation Piled-box foundaton Long-term Cyclic Loading that pressurizes is acted on |
| CN112878387A (en) * | 2021-01-05 | 2021-06-01 | 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105334109A (en) * | 2015-11-27 | 2016-02-17 | 中国矿业大学 | Test device for simulating complicated loads based on electromagnetic field, and test method using test device |
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| 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 |
| CN112878387A (en) * | 2021-01-05 | 2021-06-01 | 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 |
| 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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