CN204385784U - Based on the experimental rig of geotechnical centrifuge simulation pile foundation extraction-resistant behavior - Google Patents
Based on the experimental rig of geotechnical centrifuge simulation pile foundation extraction-resistant behavior Download PDFInfo
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- CN204385784U CN204385784U CN201420774503.XU CN201420774503U CN204385784U CN 204385784 U CN204385784 U CN 204385784U CN 201420774503 U CN201420774503 U CN 201420774503U CN 204385784 U CN204385784 U CN 204385784U
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Abstract
The utility model discloses a kind of experimental rig based on geotechnical centrifuge simulation pile foundation extraction-resistant behavior, comprise model casing, support, and pile foundation pulling capacity loading system, splendid attire foundation soil in model casing, test pile inserts in foundation soil, pile foundation pulling capacity loading system comprises the stake being arranged on load weighted platform outside model casing and being arranged on test pile upper end and to bear responsibility platform, load weighted platform and stake platform of bearing responsibility is connected by wire rope, wire rope one end is fixed on load weighted platform, the wire rope other end is fixed on stake and bears responsibility on platform, support is arranged the first pulley being used for the wire rope of upwards drawing from load weighted platform being guided to level, for the wire rope of drawing from the first pulley is guided to stake bear responsibility the second pulley above platform and be used for by draw from the second pulley and the wire rope of horizontal-extending guides to stake downwards bears responsibility the 3rd pulley of platform.The structure of this experimental rig is simple, can the extraction-resistant behavior of effective testing experiment stake.
Description
Technical field
The utility model belongs to pile foundation pullout tests technical field, is specifically related to a kind of experimental rig based on geotechnical centrifuge simulation pile foundation extraction-resistant behavior.
Background technology
When geotechnical centrifuge operates, the model casing be fixed on geotechnical centrifuge pivoted arm can circle along with centrifuge pivoted arm, rotating speed is faster, and in model casing, the acceleration field of object is larger, and the acceleration field in model casing can be increased to more than 100g by centrifuge usually.
When doing pile foundation pullout tests at present, load mode generally adopts hydraulic jack, not yet has the charger of the pile foundation pullout tests that can be used on centrifuge.If existing jack load mode is used for centrifugal model test, in the high acceleration field of model casing, hydraulic jack is from great on the one hand, needs more firm fixed form and adjust extremely inconvenience in high acceleration field; On the other hand, jack load mode does not consider that going to make full use of the high acceleration field existed in model casing loads test pile.
Utility model content
The purpose of this utility model is to overcome above-mentioned deficiency of the prior art, provides a kind of experimental rig based on geotechnical centrifuge simulation pile foundation extraction-resistant behavior.The structure of this experimental rig is simple, can the extraction-resistant behavior of effective testing experiment stake.
For achieving the above object, the technical solution adopted in the utility model is: based on the experimental rig of geotechnical centrifuge simulation pile foundation extraction-resistant behavior, it is characterized in that: comprise the model casing be arranged in geotechnical centrifuge hanging basket, be arranged on support above described model casing, and pile foundation pulling capacity loading system, be loaded with foundation soil in described model casing, test pile inserts in described foundation soil, described pile foundation pulling capacity loading system comprises the stake being arranged on load weighted platform outside described model casing and being arranged on described test pile upper end and to bear responsibility platform, described load weighted platform and stake platform of bearing responsibility is connected by wire rope, one end of described wire rope is fixed on load weighted platform, the other end of described wire rope is fixed on stake and bears responsibility on platform, described support is provided with the first pulley for the wire rope of upwards drawing from load weighted platform being guided to level, for the wire rope of drawing from the first pulley is guided to stake bear responsibility the second pulley above platform and be used for by draw from the second pulley and the wire rope of horizontal-extending guides to stake downwards bears responsibility the 3rd pulley of platform.
The above-mentioned experimental rig based on geotechnical centrifuge simulation pile foundation extraction-resistant behavior, it is characterized in that: described support comprises the support bar of two parallel layings and the first reaction beam of parallel laying and the second reaction beam, described support bar is arranged on the top of model casing, described first reaction beam and the second reaction beam are all arranged on the top of support bar, described first reaction beam and the second reaction beam are all perpendicular with described support bar, described first pulley to be arranged on the second reaction beam and to be positioned at the top of load weighted platform, described second pulley is arranged on the inner side of one of them support bar, described 3rd pulley is arranged on the bottom of the first reaction beam.
The above-mentioned experimental rig based on geotechnical centrifuge simulation pile foundation extraction-resistant behavior, it is characterized in that: described support bar stretches out model casing, and the position that described support bar stretches out model casing is provided with Terrace prevention plate, the lower end of described Terrace prevention plate is connected with the U-board for receiving described load weighted platform.
The above-mentioned experimental rig based on geotechnical centrifuge simulation pile foundation extraction-resistant behavior, it is characterized in that: the bottom surface of described first reaction beam offers the first chute extended along its length, the mount pad of described 3rd pulley is arranged on described first reaction beam by the screw stretching into described first chute.
The above-mentioned experimental rig based on geotechnical centrifuge simulation pile foundation extraction-resistant behavior, it is characterized in that: the inner side of described support bar offers the second chute extended along its length, the mount pad of described second pulley is arranged on described support bar by the screw stretching into described second chute.
The above-mentioned experimental rig based on geotechnical centrifuge simulation pile foundation extraction-resistant behavior, it is characterized in that: the upper surface of two described support bars all offers the 3rd chute extended along its length, described first reaction beam is connected with described support bar by the screw stretching into described 3rd chute.
The utility model compared with prior art has the following advantages:
1, structure of the present utility model is simple, rationally novel in design.
2, the utility model has taken into full account the feature of centrifugal test high acceleration field, pulley and wire rope is adopted to provide pulling capacity to test pile, weighted platform is unsettled design, high acceleration field on geotechnical centrifuge can be made full use of to provide load force, when weighted platform places the load of equal quality, acceleration field is larger, and the available power of weighted platform is also larger.
3, the utility model is by offering the second chute in the inner side of support bar, thus facilitate the adjustment of the second pulley position, by offering the first chute in the bottom surface of the first reaction beam, thus facilitate the adjustment of the 3rd pulley position, the pullout tests that not only can carry out straight up to pile foundation, also can carry out the pullout tests of drawing obliquely.
4, of the present utility model to realize cost low, and result of use is good, is convenient to promote the use of.
In sum, the utility model structure is simple, and rationally novel in design, functional reliability is high, long service life, and test effect is good, is convenient to promote the use of.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is top view of the present utility model.
Fig. 2 is the A-A sectional view in Fig. 1.
Fig. 3 is the B-B sectional view in Fig. 1.
Fig. 4 is that the utility model carries out the using state schematic diagram of drawing obliquely to test pile.
Fig. 5 is the top view of the utility model first reaction beam.
Fig. 6 be the utility model and geotechnical centrifuge with the use of structural representation.
Description of reference numerals:
1-model casing; 2-support; 2-1-the first reaction beam;
2-2-the second reaction beam; 2-3-support bar; 2-4-the first chute;
2-5-the second chute; 2-6-the 3rd chute; 3-stake is born responsibility platform;
4-test pile; 5-foundation soil; 6-wire rope;
7-the three pulley; 8-the second pulley; 9-the first pulley;
10-Terrace prevention plate; 11-U-board; 12-load weighted platform;
13-geotechnical centrifuge; 13-1-hanging basket; 13-2-centrifuge rotating shaft;
13-3-centrifuge pivoted arm; 13-4-hanging basket rotating shaft; 13-5-hanging basket base plate.
Detailed description of the invention
A kind of experimental rig based on geotechnical centrifuge simulation pile foundation extraction-resistant behavior as shown in Figure 1, Figure 2 and Figure 3, comprise the model casing 1 be arranged in geotechnical centrifuge 13 hanging basket 13-1, be arranged on support 2 above described model casing 1, and pile foundation pulling capacity loading system, be loaded with foundation soil 5 in described model casing 1, test pile 4 inserts in described foundation soil 5, described pile foundation pulling capacity loading system comprises the stake being arranged on load weighted platform outside described model casing 1 12 and being arranged on described test pile 4 upper end and to bear responsibility platform 3, described load weighted platform 12 and stake platform 3 of bearing responsibility is connected by wire rope 6, one end of described wire rope 6 is fixed on load weighted platform 12, the other end of described wire rope 6 is fixed on stake and bears responsibility on platform 3, described support 2 is provided with the first pulley 9 for the wire rope of upwards drawing from load weighted platform 12 6 being guided to level, for the wire rope 6 of drawing from the first pulley 9 is guided to stake bear responsibility the second pulley 8 above platform 3 and be used for by draw from the second pulley 8 and the wire rope 6 of horizontal-extending guides to stake downwards bears responsibility the 3rd pulley 7 of platform 3.
As Fig. 1, shown in Fig. 2 and Fig. 3, described support 2 comprises the support bar 2-3 of two parallel layings and the first reaction beam 2-1 of parallel laying and the second reaction beam 2-2, described support bar 2-3 is arranged on the top of model casing 1, described first reaction beam 2-1 and the second reaction beam 2-2 is all arranged on the top of support bar 2-3, described first reaction beam 2-1 and the second reaction beam 2-2 is all perpendicular with described support bar 2-3, described first pulley 9 to be arranged on the second reaction beam 2-2 and to be positioned at the top of load weighted platform 12, described second pulley 8 is arranged on the inner side of one of them support bar 2-3, described 3rd pulley 7 is arranged on the bottom of the first reaction beam 2-1.
As shown in Figure 3, described support bar 2-3 stretches out model casing 1, and the position that described support bar 2-3 stretches out model casing 1 is provided with Terrace prevention plate 10, and the lower end of described Terrace prevention plate 10 is connected with the U-board 11 for receiving described load weighted platform 12.
As shown in Figure 5, the bottom surface of described first reaction beam 2-1 offers the first chute 2-4 extended along its length, and the mount pad of described 3rd pulley 7 is arranged on described first reaction beam 2-1 by the screw stretching into described first chute 2-4.
As shown in Figure 3, the inner side of described support bar 2-3 offers the second chute 2-5 extended along its length, and the mount pad of described second pulley 8 is arranged on described support bar 2-3 by the screw stretching into described second chute 2-5.
As shown in Figure 1, the upper surface of two described support bar 2-3 all offers the 3rd chute 2-6 extended along its length, and described first reaction beam 2-1 is connected with described support bar 2-3 by the screw stretching into described 3rd chute 2-6.
In the present embodiment, when installing this experimental rig, be arranged on by the 3rd pulley 7 on first reaction beam 2-1, now the 3rd pulley 7 can move along the first chute 2-4 on the first reaction beam 2-1; Be arranged on support bar 2-3 by the first reaction beam 2-1 that the 3rd pulley 7 is housed, now the first reaction beam 2-1 can move along the 3rd chute 2-6 on support bar 2-3; Support bar 2-3 is arranged on model casing 1, and adjusts the position of the first reaction beam 2-1 according to pile anchoring position along the 3rd chute 2-6 and fix the first reaction beam 2-1; Adjust the position of the 3rd pulley 7 along the first chute 2-4, now, if carry out vertically pulling-resistant test, align and fix in the center of platform 10 of the position of stretching out wire rope 6 from the 3rd pulley 7 and stake need being born responsibility; If carry out oblique pullout tests, the 3rd pulley 7 need be adjusted to required position along the first chute 2-4 and fix; Second reaction beam 2-2 to be arranged on support bar 2-3 and fixing, then be bolted and the first pulley 9 is arranged on the soffit of the second reaction beam 2-2 and the one side be positioned at inside support bar 2-3, the pulley spindle of described first pulley 9 parallels with the central axis of the second reaction beam 2-3.Then, wire rope 6 is arrived stake through the first pulley 9, second pulley 8 and the first pulley 9 successively and to bear responsibility platform 3 be fixed on stake and bear responsibility on platform 3, wire rope 6 other end is then fixed on load weighted platform 12.U-board 11 is fixed on the lower end of Terrace prevention plate 10, then Terrace prevention plate 10 bolt is connected to the inner side that support bar 2-3 stretches out model casing 1 part.
Composition graphs 2, Fig. 3 and Fig. 6, geotechnical centrifuge 13 is a kind of test apparatuses that can provide artificial high gravitational field.Described geotechnical centrifuge 13 comprises hanging basket 13-1, centrifuge rotating shaft 13-2, centrifuge pivoted arm 13-3 and hanging basket rotating shaft 13-4, during use, is fixed on by mounted experimental rig on the hanging basket base plate 13-5 in hanging basket 13-1.When geotechnical centrifuge 13 does not start, the acceleration field a in hanging basket 13-1 is gravity acceleration g, and direction is vertical with hanging basket base plate 13-5.When geotechnical centrifuge 13 runs, centrifuge pivoted arm 13-3 drives hanging basket 13-1 around centrifuge rotating shaft 13-2 High Rotation Speed, and hanging basket 13-1 can rotate around hanging basket rotating shaft 13-4 under centrifugal action, thus run-off the straight, acceleration field a now in model casing 1 is the vector sum of the acceleration field (horizontal direction) that earth gravitational field g (vertical direction) and centrifugal force produce, the direction of this acceleration field a does not change relative to hanging basket 13-1, still perpendicular to hanging basket base plate 13-5.When geotechnical centrifuge 13 runs, there is centrifugal acceleration field a in hanging basket 13-1, regulate because hanging basket 13-1 can carry out rotation around hanging basket rotating shaft 13-4, therefore the direction of this acceleration field a is vertical with hanging basket base plate 13-5 all the time when centrifuge speed is different.Under the effect of centrifugal acceleration field a, quality is that the load load plate of m is arranged on load weighted platform 12, produces tensile force f straight down, wherein F=m × a to wire rope 6.Bear responsibility on platform 3 because wire rope 6 other end is fixed on stake, by the transmission of wire rope 6 pairs of tensile force fs, pulling capacity is applied to test pile 4, thus the extraction-resistant behavior of test pile 4 is tested.
50g, 60g, 140g, 200g is set as respectively when geotechnical centrifuge 13 runs acceleration; quality is the pulling capacity F that the load load plate of m is created stake top by wire rope 6; size is respectively 50mg, 60mg, 140mg, 200mg, thus reaches the object of not shutting down hierarchical loading.
As shown in Figure 4, by adjusting the position of the 3rd pulley 7, and then can realize carrying out drawing obliquely to test pile 4.As shown in Figure 2, by adjusting the position of the 3rd pulley 7, and then can realize test pile 4 pullout tests straight up.
The above; it is only preferred embodiment of the present utility model; not the utility model is imposed any restrictions; every above embodiment is done according to the utility model technical spirit any simple modification, change and equivalent structure transformation, all still belong in the protection domain of technical solutions of the utility model.
Claims (6)
1. based on the experimental rig of geotechnical centrifuge simulation pile foundation extraction-resistant behavior, it is characterized in that: comprise the model casing (1) be arranged in geotechnical centrifuge (13) hanging basket (13-1), be arranged on the support (2) of described model casing (1) top and pile foundation pulling capacity loading system, be loaded with foundation soil (5) in described model casing (1), test pile (4) inserts in described foundation soil (5), described pile foundation pulling capacity loading system comprises the load weighted platform (12) being arranged on described model casing (1) outside and the stake being arranged on described test pile (4) upper end and to bear responsibility platform (3), described load weighted platform (12) and stake platform (3) of bearing responsibility is connected by wire rope (6), one end of described wire rope (6) is fixed on load weighted platform (12), the other end of described wire rope (6) is fixed on stake and bears responsibility on platform (3), described support (2) is provided with the first pulley (9) for the wire rope of upwards drawing from load weighted platform (12) (6) being guided to level, for the wire rope of drawing from the first pulley (9) (6) is guided to stake bear responsibility platform (3) top the second pulley (8) and for by draw from the second pulley (8) and the wire rope of horizontal-extending (6) guides to stake downwards bears responsibility the 3rd pulley (7) of platform (3).
2. the experimental rig based on geotechnical centrifuge simulation pile foundation extraction-resistant behavior according to claim 1, it is characterized in that: described support (2) comprises the support bar (2-3) of two parallel layings and first reaction beam (2-1) of parallel laying and the second reaction beam (2-2), described support bar (2-3) is arranged on the top of model casing (1), described first reaction beam (2-1) and the second reaction beam (2-2) are all arranged on the top of support bar (2-3), described first reaction beam (2-1) and the second reaction beam (2-2) are all perpendicular with described support bar (2-3), described first pulley (9) is arranged on the second reaction beam (2-2) and goes up and the top being positioned at load weighted platform (12), described second pulley (8) is arranged on the inner side of one of them support bar (2-3), described 3rd pulley (7) is arranged on the bottom of the first reaction beam (2-1).
3. the experimental rig based on geotechnical centrifuge simulation pile foundation extraction-resistant behavior according to claim 2, it is characterized in that: described support bar (2-3) stretches out model casing (1), and the position that described support bar (2-3) stretches out model casing (1) is provided with Terrace prevention plate (10), the lower end of described Terrace prevention plate (10) is connected with the U-board (11) for receiving described load weighted platform (12).
4. the experimental rig based on geotechnical centrifuge simulation pile foundation extraction-resistant behavior according to claim 2, it is characterized in that: the bottom surface of described first reaction beam (2-1) offers the first chute (2-4) extended along its length, the mount pad of described 3rd pulley (7) is arranged on described first reaction beam (2-1) by the screw stretching into described first chute (2-4).
5. the experimental rig based on geotechnical centrifuge simulation pile foundation extraction-resistant behavior according to claim 2, it is characterized in that: the inner side of described support bar (2-3) offers the second chute (2-5) extended along its length, the mount pad of described second pulley (8) is arranged on described support bar (2-3) by the screw stretching into described second chute (2-5).
6. the experimental rig based on geotechnical centrifuge simulation pile foundation extraction-resistant behavior according to claim 2, it is characterized in that: the upper surface of two described support bars (2-3) all offers the 3rd chute (2-6) extended along its length, described first reaction beam (2-1) is connected with described support bar (2-3) by the screw stretching into described 3rd chute (2-6).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420774503.XU CN204385784U (en) | 2014-12-09 | 2014-12-09 | Based on the experimental rig of geotechnical centrifuge simulation pile foundation extraction-resistant behavior |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420774503.XU CN204385784U (en) | 2014-12-09 | 2014-12-09 | Based on the experimental rig of geotechnical centrifuge simulation pile foundation extraction-resistant behavior |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105604106A (en) * | 2016-03-10 | 2016-05-25 | 清华大学 | Ocean engineering pile foundation experiment simulation apparatus and method under long-term horizontal cyclic loading |
| CN109403396A (en) * | 2018-12-24 | 2019-03-01 | 西安建筑科技大学 | A kind of pile foundation model test combines loading device and method with above pulling out with horizontal |
| CN111024496A (en) * | 2019-11-28 | 2020-04-17 | 中国建筑第八工程局有限公司 | Force transmission device for anti-pulling test and detection method thereof |
-
2014
- 2014-12-09 CN CN201420774503.XU patent/CN204385784U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105604106A (en) * | 2016-03-10 | 2016-05-25 | 清华大学 | Ocean engineering pile foundation experiment simulation apparatus and method under long-term horizontal cyclic loading |
| CN105604106B (en) * | 2016-03-10 | 2017-05-17 | 清华大学 | Ocean engineering pile foundation experiment simulation apparatus and method under long-term horizontal cyclic loading |
| CN109403396A (en) * | 2018-12-24 | 2019-03-01 | 西安建筑科技大学 | A kind of pile foundation model test combines loading device and method with above pulling out with horizontal |
| CN109403396B (en) * | 2018-12-24 | 2024-03-12 | 西安建筑科技大学 | Horizontal and upward pulling combined loading device and method for pile foundation model test |
| CN111024496A (en) * | 2019-11-28 | 2020-04-17 | 中国建筑第八工程局有限公司 | Force transmission device for anti-pulling test and detection method thereof |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150610 Termination date: 20161209 |