CN209941757U - Loading device for pile foundation bearing capacity characteristic test under indoor combined load effect - Google Patents
Loading device for pile foundation bearing capacity characteristic test under indoor combined load effect Download PDFInfo
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- CN209941757U CN209941757U CN201920188163.5U CN201920188163U CN209941757U CN 209941757 U CN209941757 U CN 209941757U CN 201920188163 U CN201920188163 U CN 201920188163U CN 209941757 U CN209941757 U CN 209941757U
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Abstract
The utility model discloses a loading device for pile foundation bearing capacity characteristic test under indoor combined load effect, which comprises a model box, a vertical loading device and a transverse loading device, wherein the model box is vertically embedded in a test soil body, a horizontal guide beam in the vertical loading device is horizontally and transversely arranged, a vertical weight is hung and connected on the bottom surface of a cross beam, the top of a supporting deflection device is abutted against the bottom surface of the cross beam, and the vertical weight and the supporting deflection device are symmetrically arranged relative to a test single pile; the transverse loading device comprises two groups of loading units positioned on two sides of the test single pile. The utility model has the advantages that: the test device has a simple structure, can perform horizontal force loading and bending moment loading tests while keeping vertical pressurization, and can also perform vertical load tests while keeping horizontal force or bending moment pressurization.
Description
Technical Field
The utility model belongs to the technical field of pile foundation model test, concretely relates to a loading device that is used for pile foundation bearing capacity characteristic test under indoor combined load effect.
Background
The pile foundation is the most main foundation form of the offshore wind turbine, and the pile foundation needs to simultaneously bear vertical loads transmitted by an upper structure and horizontal and bending moment loads such as wind, waves, currents and the like in the application of the offshore wind turbine. The loads can mutually influence, but the existing construction design mostly considers the foundation bearing characteristic under the action of single load, and does not consider the influence of the application of vertical load on the horizontal load and the bending moment bearing capacity characteristic or the influence of the application of horizontal load on the vertical bearing capacity characteristic. Many scholars at home and abroad do much research work on the bearing characteristics of a single pile under the combined conditions of horizontal load, vertical load and bending moment load, but a completely consistent conclusion is not yet obtained, the understanding on the bearing characteristics of the pile under the combined action of two or more loads is still not deep enough, and the analysis by combining an indoor model test is an effective way.
The existing pile foundation model test method has the following defects: only can provide loading in a single direction or in the horizontal or vertical direction, and cannot simultaneously apply various forms such as horizontal force, bending moment, vertical combined load and the like; when a load is applied in the horizontal direction, the pile top generates horizontal displacement, and the vertical load cannot guarantee that the direction is always vertical downwards.
Disclosure of Invention
The utility model aims at providing a weak point according to above-mentioned prior art provides a loading device that is used for pile foundation bearing capacity characteristic test under the effect of indoor combined load, through setting up vertical loading device and horizontal loading device, combines to support the device that shifts for equipment can carry out horizontal force loading and moment of flexure loading test when keeping vertical pressor, also can carry out vertical load test when keeping horizontal force or moment of flexure pressor.
The utility model discloses the purpose is realized accomplishing by following technical scheme:
the utility model provides a loading device that is used for experimental pile foundation bearing capacity characteristic under indoor combined load effect, includes mold box and vertical loading device, the experimental soil body is filled in the mold box, and experimental single pile buries vertically to be established in the experimental soil body, vertical loading device includes crossbeam, horizontal guide beam, two sets of vertical weights and two sets of supports shift the device, the crossbeam sets up the top of mold box, horizontal guide beam level is horizontal to be set up on the bottom surface of crossbeam, vertical weight hangs to be connect on the bottom surface of crossbeam, support shift the device top and support and be in on the bottom surface of crossbeam, vertical weight for experimental single pile symmetry sets up, support shift the device for experimental single pile symmetry sets up.
A loading device for indoor combined load effect is experimental still includes horizontal loading device for pile foundation bearing capacity characteristic down, horizontal loading device includes that two sets of being located the loading unit of experimental single pile both sides, every the loading unit includes pulley and horizontal weight, around there being the wire cable on the pulley, the vertical connection of one end of wire cable horizontal weight, other end horizontally connect experimental single pile, the pulley is installed support shift on the device.
The installation heights of the pulleys of the two groups of loading units are different.
The support deflection device comprises a spring deflection device and an upright post, and the spring deflection device is installed at the top of the upright post.
The upright column comprises a top column and a bottom column, and the top column is connected to the upper part of the bottom column in a manner of moving up and down through threads.
The spring position changer comprises a dowel bar, a pressure sensor, a spring, a limiting shell and a base, wherein the pressure sensor is arranged at the top of the dowel bar, the top of the spring is abutted to the bottom of the dowel bar, the upper part of the limiting shell is surrounded by the outer edge of the dowel bar, the lower part of the limiting shell is wrapped by the spring, the base is arranged at the bottom of the limiting shell, and the bottom of the spring is abutted to the base.
The base is detachably connected with the limiting shell.
The top of experimental single pile is provided with the pile cap, the top of pile cap is the hemisphere.
The bottom surface of the horizontal guide beam is provided with a semi-cylindrical guide groove matched with the pile cap, and the top of the pile cap is abutted to the inside of the guide groove.
The utility model has the advantages that: (1) the device can carry out horizontal force loading and bending moment loading tests while keeping vertical pressurization, and can also carry out vertical load tests while keeping horizontal force or bending moment pressurization; (2) multiple combined load forms such as horizontal force, vertical force, bending moment and the like can be applied to one set of equipment respectively or simultaneously, and the real stress state of the pile foundation is simulated; (3) when the pile top generates horizontal displacement after receiving horizontal load, the vertical load still can effectively ensure the direction to be consistent all the time.
Drawings
Fig. 1 is a schematic structural diagram of a loading device for a pile foundation bearing capacity characteristic test under the effect of indoor combined load in an embodiment of the present invention;
fig. 2 is a schematic structural view of a horizontal guide beam in an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a column in an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a spring position changer in an embodiment of the present invention.
Detailed Description
The features of the present invention and other related features are described in further detail below by way of example with reference to the accompanying drawings, for the understanding of those skilled in the art:
referring to fig. 1-4, the labels in the figures are: the device comprises a model box 1, a test single pile 2, a cross beam 3, a horizontal guide beam 4, a vertical weight 5, a spring positioner 6, a pulley 7, a transverse weight 8, a steel wire rope 9, a top column 10, a bottom column 11, a dowel steel 12, a pressure sensor 13, a spring 14, a limiting shell 15, a base 16, a pile cap 17 and a guide groove 18.
Example (b): as shown in fig. 1 to 4, the present embodiment specifically relates to a loading device for a pile foundation bearing capacity characteristic test under the effect of an indoor combined load, and by providing a vertical loading device and a horizontal loading device and combining with a supporting displacement device, the apparatus can perform a horizontal force loading test and a bending moment loading test while maintaining vertical pressurization, and also perform a vertical load test while maintaining horizontal force or bending moment pressurization.
As shown in figure 1, the loading device for the pile foundation bearing capacity characteristic test under the indoor combined load effect comprises a model box 1 and a vertical loading device, wherein a test soil body is filled in the model box 1, a test single pile 2 is vertically buried in the test soil body, and the installation environment required by the test single pile 2 is simulated through the test soil body. Vertical loading device includes crossbeam 3, horizontal guide beam 4, two sets of vertical weights 5 and two sets of supports the device that shifts, crossbeam 3 sets up in model box 1's top, horizontal guide beam 4 level transversely sets up on the bottom surface of crossbeam 3, vertical weights 5 hang and connect on the bottom surface of crossbeam 3, support the device top that shifts and support on the bottom surface of crossbeam 3, vertical weights 5 sets up for experimental monopile 2 symmetries, support the device that shifts and set up for experimental monopile 2 symmetries. Crossbeam 3 and horizontal guide beam 4 are used for exerting pressure vertical pressure to experimental single pile 2, thereby two sets of vertical weights 5 hang 3 both sides of crossbeam and exert the controllable vertical load of weight to experimental single pile 2, support the device that shifts and be used for supporting crossbeam 3 and the bearing capacity of response experimental single pile 2 under the combined load. When the pile top of the single test pile 2 generates horizontal displacement after receiving horizontal load, the vertical load can still effectively ensure the consistent direction under the action of the horizontal guide beam 4.
As shown in fig. 1, the loading device for testing the bearing capacity characteristic of the pile foundation under the effect of the indoor combined load in the embodiment further comprises a transverse loading device, the transverse loading device comprises two groups of loading units located on two sides of the test single pile 2, each loading unit comprises a pulley 7 and a transverse weight 8, a steel wire 9 is wound on each pulley 7, one end of each steel wire 9 is vertically connected with each transverse weight 8, the other end of each steel wire 9 is horizontally connected with the test single pile 2, and each pulley 7 is installed on the supporting displacement device. The mounting heights of the pulleys 7 of the two groups of loading units are different. The pulleys 7 and the steel wire 9 have a guiding function, and transverse loads are applied to different horizontal height positions of the single test pile 2 under the action of the steel wire 9 by changing the height of the pulleys 7. The loading unit applies horizontal loads to the test single pile 2 from two different directions respectively, the two horizontal loads are arranged at different heights in a split mode, more complex multi-element horizontal loads can be simulated, the environment of the test single pile 2 is more approximate to that of the actual test single pile, and more accurate test results can be obtained. The weight of the weight and the height of the pulley 7 are controlled, so that horizontal and bending moment loads can be applied to the test single pile 2.
As shown in fig. 3 and 4, in the present embodiment, the support indexing means includes a spring indexer 6 and a column, and the spring indexer 6 is mounted on the top of the column. The stand contains fore-set 10 and foundation 11, and fore-set 10 can be connected on upper portion at foundation 11 through the screw with reciprocating, and fore-set 10 accessible screw thread freely moves, possesses the ability of height-adjusting, can adapt to not unidimensional experimental single pile 2 and test. Spring ware 6 that shifts includes dowel steel 12, pressure sensor 13, spring 14, spacing casing 15, base 16, pressure sensor 13 sets up the top at dowel steel 12, the top of spring 14 supports the bottom at dowel steel 12, the outer fringe setting around dowel steel 12 on the upper portion of spacing casing 15, the moving direction of dowel steel 12 is guaranteed all the time vertically from top to bottom on the upper portion of spacing casing 15, spring 14 is wrapped up including the lower part of spacing casing 15, base 16 sets up the bottom at spacing casing 15, the bottom of spring 14 supports on base 16. The top of the dowel bar 12 is abutted against the bottom surface of the cross beam 3 through the pressure sensor 13 attached to the upper surface, the load transmitted by the cross beam 3 is sensed through the pressure sensor 13, the spring 14 can generate compression deformation under the action of the load transmitted by the dowel bar 12, and the structural stability of the spring position changer 6 is ensured. The base 16 detachably connects spacing casing 15, and the structure of accessible screw, draw-in groove is fixed, demolishs the spring 14 that can change in the spring ware 6 that shifts after the base 16, and the pile foundation model test of the different vertical power demands of spring 14 adaptation through the different models of replacement. Based on the structure that the vertical loading device and the transverse loading device are symmetrically arranged, the vertical stress of the pile top is one third of the total vertical loading obtained through calculation, and the true value of the vertical force applied to the pile top of the single test pile 2 can also be accurately calculated through the data acquired by the pressure sensor 13.
As shown in fig. 1 and 2, in the present embodiment, a pile cap 17 is provided on the top of the test mono-pile 2, and the top of the pile cap 17 is a hemisphere. The bottom surface of the horizontal guide beam 4 is provided with a semi-cylindrical guide groove 18 matched with the pile cap 17, and the top of the pile cap 17 is propped in the guide groove 18. When the test single pile 2 generates horizontal displacement, the pile cap 17 moves along with the extending direction of the horizontal guide beam 4, so that the vertical load can still effectively ensure that the directions are consistent all the time.
The embodiment has the following advantages: the device can carry out horizontal force loading and bending moment loading tests while keeping vertical pressurization, and can also carry out vertical load tests while keeping horizontal force or bending moment pressurization; multiple combined load forms such as horizontal force, vertical force, bending moment and the like can be applied to one set of equipment respectively or simultaneously, and the real stress state of the pile foundation is simulated; when the pile top generates horizontal displacement after receiving horizontal load, the vertical load still can effectively ensure the direction to be consistent all the time.
Claims (9)
1. The utility model provides a loading device that is used for experimental pile foundation bearing capacity characteristic under indoor combined load effect, a serial communication port, including mold box and vertical loading device, fill experimental soil body in the mold box, experimental single pile buries vertically and establishes in the experimental soil body, vertical loading device includes crossbeam, horizontal guide beam, two sets of vertical weights and two sets of supports shift the device, the crossbeam sets up the top of mold box, horizontal guide beam level is horizontal to be set up on the bottom surface of crossbeam, vertical weight hangs to connect on the bottom surface of crossbeam, support the device top that shifts and support and be in on the bottom surface of crossbeam, vertical weight for experimental single pile symmetry sets up, support shift the device for experimental single pile symmetry sets up.
2. The loading device for the pile foundation bearing capacity characteristic test under the indoor combined load action according to claim 1, further comprising a transverse loading device, wherein the transverse loading device comprises two groups of loading units positioned at two sides of the test single pile, each loading unit comprises a pulley and a transverse weight, a steel wire is wound on the pulley, one end of the steel wire is vertically connected with the transverse weight, the other end of the steel wire is horizontally connected with the test single pile, and the pulley is installed on the supporting deflection device.
3. The loading device for the test of the bearing capacity characteristic of the pile foundation under the effect of the indoor combined load as claimed in claim 2, wherein the installation heights of the pulleys of the two groups of loading units are different.
4. The loading device for the pile foundation bearing capacity characteristic test under the indoor combined load as claimed in claim 1, wherein the support deflection device comprises a spring deflector and a vertical column, and the spring deflector is installed at the top of the vertical column.
5. The loading device for testing the bearing capacity characteristic of the pile foundation under the action of indoor combined load as claimed in claim 4, wherein the upright column comprises a top column and a bottom column, and the top column is connected to the upper part of the bottom column in a manner that the top column can move up and down through threads.
6. The loading device for the pile foundation bearing capacity characteristic test under the indoor combined load as claimed in claim 4, wherein the spring deflector comprises a dowel, a pressure sensor, a spring, a limiting shell and a base, the pressure sensor is arranged at the top of the dowel, the top of the spring abuts against the bottom of the dowel, the upper part of the limiting shell is arranged around the outer edge of the dowel, the spring is wrapped inside the lower part of the limiting shell, the base is arranged at the bottom of the limiting shell, and the bottom of the spring abuts against the base.
7. The loading device for testing the bearing capacity characteristic of the pile foundation under the action of indoor combined load according to claim 6, wherein the base is detachably connected with the limiting shell.
8. The loading device for testing the bearing capacity characteristic of the pile foundation under the action of indoor combined load according to claim 1, wherein a pile cap is arranged at the top of the single test pile, and the top of the pile cap is hemispherical.
9. The loading device for testing the bearing capacity characteristic of the pile foundation under the indoor combined load of claim 8, wherein the bottom surface of the horizontal guide beam is provided with a semi-cylindrical guide groove matched with the pile cap, and the top of the pile cap abuts against the guide groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920188163.5U CN209941757U (en) | 2019-02-03 | 2019-02-03 | Loading device for pile foundation bearing capacity characteristic test under indoor combined load effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920188163.5U CN209941757U (en) | 2019-02-03 | 2019-02-03 | Loading device for pile foundation bearing capacity characteristic test under indoor combined load effect |
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| CN209941757U true CN209941757U (en) | 2020-01-14 |
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| CN201920188163.5U Expired - Fee Related CN209941757U (en) | 2019-02-03 | 2019-02-03 | Loading device for pile foundation bearing capacity characteristic test under indoor combined load effect |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109972670A (en) * | 2019-02-03 | 2019-07-05 | 华东交通大学 | The loading device of lower bearing capacity of pile foundation attribute testing is acted on for indoor combined load |
| CN111719602A (en) * | 2020-06-30 | 2020-09-29 | 扬州大学 | Pile foundation model loading device under complex load effect |
| CN113130098A (en) * | 2021-03-30 | 2021-07-16 | 上海核工程研究设计院有限公司 | Nuclear fuel assembly prevents hook performance test device |
| CN113740095A (en) * | 2021-09-14 | 2021-12-03 | 中海石油(中国)有限公司湛江分公司 | Simulation experiment device and simulation experiment method for building suction pile well |
-
2019
- 2019-02-03 CN CN201920188163.5U patent/CN209941757U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109972670A (en) * | 2019-02-03 | 2019-07-05 | 华东交通大学 | The loading device of lower bearing capacity of pile foundation attribute testing is acted on for indoor combined load |
| CN111719602A (en) * | 2020-06-30 | 2020-09-29 | 扬州大学 | Pile foundation model loading device under complex load effect |
| CN111719602B (en) * | 2020-06-30 | 2022-03-22 | 扬州大学 | Pile foundation model loading device under complex load effect |
| CN113130098A (en) * | 2021-03-30 | 2021-07-16 | 上海核工程研究设计院有限公司 | Nuclear fuel assembly prevents hook performance test device |
| CN113740095A (en) * | 2021-09-14 | 2021-12-03 | 中海石油(中国)有限公司湛江分公司 | Simulation experiment device and simulation experiment method for building suction pile well |
| CN113740095B (en) * | 2021-09-14 | 2024-04-09 | 中海石油(中国)有限公司湛江分公司 | Simulation experiment device and simulation experiment method for suction pile well construction |
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Granted publication date: 20200114 Termination date: 20210203 |