CN202492862U - Loading test device of slant dynamic load of pile foundation - Google Patents
Loading test device of slant dynamic load of pile foundation Download PDFInfo
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- CN202492862U CN202492862U CN2012200186863U CN201220018686U CN202492862U CN 202492862 U CN202492862 U CN 202492862U CN 2012200186863 U CN2012200186863 U CN 2012200186863U CN 201220018686 U CN201220018686 U CN 201220018686U CN 202492862 U CN202492862 U CN 202492862U
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- connecting plate
- fixed pulley
- oblique
- japanese
- screw rod
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Abstract
The utility model relates to a loading test device of slant dynamic loads of pile foundations, belonging to the technical field of civil engineering. The loading test device of the slant dynamic loads of the pile foundations comprises a slant support plate, the bottom end of the slant support plate is connected with an L-shaped baffle plate, and both sides of the L-shaped baffle plate are respectively provided with a first fixed pulley and a second fixed pulley; both ends of connecting plates of a frame shaped like a Chinese character 'ri' are respectively provided with circular through holes, and screw rods pass through the circular through holes of the connecting plates and are fixed by screw caps; the first screw rod of the frame shaped like a Chinese character 'ri' is hung on the first fixed pulley, the second screw rod is hung on the second fixed pulley, the center line position of the upper part of the slant surface of the slant support plate is provided with a third fixed pulley, and the slant support plate is provided with a through hole just above the third fixed pulley; the first connecting plate is connected with one end of a connecting line, the other end of the connecting line passes through the third fixed pulley to be connected with a vibration exciter through the through hole of the slant support plate, the third connecting plate is connected with a loaded body through the connecting line, the second connecting plate of the frame shaped like a Chinese character 'ri' passes through a jack to be connected with the top end of a pressure sensor, and the bottom end of the pressure sensor is arranged on the L-shaped baffle plate.
Description
Technical field
The utility model belongs to technical field of civil engineering, particularly relates to the oblique dynamic load load testing machine of a kind of pile foundation.This experimental rig is applicable to the oblique static load of pile foundation engineering, the experimental study of oblique dynamic load.
Background technology
Current civil engineering trends towards the big scale of construction, bears complicated load and extreme natural conditions.Pile foundation is not to bear simple vertical load, horizontal loading in the actual engineering, but is bearing oblique downforce, this vector load of pull out force obliquely.For the pile foundation bearing mechanism of research power, vector load action, do not have a kind of load bringing device can satisfy vector simultaneously and load and the dynamic action condition.
At present, the oblique dynamic load load testing machine of existing pile foundation is difficult to satisfy stable the applying to stake top skew force in the pile foundation test; And the process that applies of power is more complicated, and the full vector of stable power applies and is difficult to especially realize.
The utility model content
To the problem that prior art exists, the utility model provides a kind of oblique dynamic load load testing machine of pile foundation that can satisfy vector loading and dynamic action condition simultaneously.
To achieve these goals; The utility model adopts following technical scheme; The oblique dynamic load load testing machine of a kind of pile foundation; Comprise oblique gripper shoe, Japanese, jack, vibrator, L type baffle plate and pressure sensor, the bottom of said oblique gripper shoe is connected with L type baffle plate, is respectively arranged with first fixed pulley and second fixed pulley in the both sides of said L type baffle plate; Form by first connecting plate, second connecting plate, the 3rd connecting plate, first screw rod and second screw rod for said Japanese; The two ends of said first connecting plate, second connecting plate and the 3rd connecting plate are respectively arranged with manhole; Said first screw rod is through the manhole of first connecting plate, second connecting plate and the 3rd connecting plate one side; And through fixed by nut, said second screw rod passes through the manhole of first connecting plate, second connecting plate and the 3rd connecting plate opposite side, and passes through fixed by nut; First said Japanese the screw rod is taken and is placed on first fixed pulley; Second screw rod is taken and is placed on second fixed pulley; The top center line on the inclined-plane of said oblique gripper shoe is provided with the 3rd fixed pulley, and the oblique gripper shoe directly over said the 3rd fixed pulley is provided with through hole; First said Japanese the connecting plate is connected with an end of connecting line, and the other end of connecting line is connected with vibrator through the through hole on the oblique gripper shoe through the 3rd fixed pulley, and the 3rd said Japanese connecting plate is connected with receiving carrier through connecting line; Second said Japanese the connecting plate is connected with the top of pressure sensor through jack, and the bottom of said pressure sensor is arranged on the L type baffle plate.
In order to guarantee vibrator preloading stable in applying mechanism, be provided with circular groove in the center of second said Japanese the connecting plate, said circular groove is corresponding with the top of jack.
Apply in that loading procedure is stable in order to ensure the quiet dynamic load of vector, in said circular groove, be provided with spring.
Said oblique gripper shoe and L type baffle plate link together through bolt.
The beneficial effect of the utility model:
1, the oblique dynamic load load testing machine of the pile foundation of the utility model has realized that the vector of oblique dynamic loading and oblique dead load applies;
2, the oblique dynamic load load testing machine of the pile foundation of the utility model adjustable is strong, can adjust the position of connecting plate through regulating nut, makes the experimental rig of the utility model and receives the connection procedure of carrier more flexible;
3, the oblique dynamic load load testing machine of the pile foundation of the utility model can satisfy vector loading and dynamic action condition simultaneously.
The utility model is Liaoning Province's natural science fund assistance (bullets: 20102103).
Description of drawings
Fig. 1 is the structural representation of the oblique dynamic load load testing machine of the pile foundation of the utility model;
Fig. 2 is the left view of Fig. 1;
Fig. 3 is the structural representation of the oblique gripper shoe of the utility model;
Fig. 4 is the left view of Fig. 3;
Fig. 5 is Japanese the structural representation of the utility model;
Fig. 6 is the structural representation of second connecting plate of the utility model;
Fig. 7 is the Load Transfer figure of experimental rig in static loading test of the utility model;
Fig. 8 is the Load Transfer figure of experimental rig in dynamic loading test of the utility model;
Among the figure, 1-vibrator, 2-connecting line, 3-fixed end, 4-the 3rd fixed pulley, 5-first connecting plate, 6-first screw rod; 7-second connecting plate, 8-bolt, 9-jack, 10-pressure sensor, 11-L type baffle plate, Japanese of 12-, the oblique gripper shoe of 13-; 14-receives carrier, 15-the 3rd connecting plate, 16-first fixed pulley, 17-second fixed pulley, 18-through hole, 19-second screw rod; The 20-nut, 21-spring, 22-circular groove, 23-manhole, 24-fixed dam, 25-circular hole.
The specific embodiment
Like Fig. 1～shown in Figure 6; The oblique dynamic load load testing machine of a kind of pile foundation; Comprise oblique gripper shoe 13, Japanese 12, jack 9, vibrator 1, L type baffle plate 11 and pressure sensor 10; The bottom of said oblique gripper shoe 13 is connected through bolt 8 with L type baffle plate 11; Be respectively arranged with first fixed pulley 16 and second fixed pulley 17 in the both sides of said L type baffle plate 11, the axle center height of said first fixed pulley 16 and second fixed pulley 17 must guarantee that the angle of Japanese 12 load application is parallel to oblique gripper shoe 13; Form by first connecting plate 5, second connecting plate 7, the 3rd connecting plate 15, first screw rod 6 and second screw rod 19 for said Japanese 12; The two ends of said first connecting plate 5, second connecting plate 7 and the 3rd connecting plate 15 are respectively arranged with manhole 23; Said first screw rod 6 is through the manhole 23 of first connecting plate 5, second connecting plate 7 and the 3rd connecting plate 15 1 sides; And it is fixing through nut 20; Said second screw rod 19 is through the manhole 23 of first connecting plate 5, second connecting plate 7 and the 3rd connecting plate 15 opposite sides, and fixing through nut 20; First said Japanese 12 screw rod 6 is taken and is placed on first fixed pulley 16; Second screw rod 19 is taken and is placed on second fixed pulley 17; The top center line on the inclined-plane of said oblique gripper shoe 13 is provided with the 3rd fixed pulley 4, and the oblique gripper shoe 13 directly over said the 3rd fixed pulley 4 is provided with through hole 18; First said Japanese 12 connecting plate 5 is connected with an end of connecting line 2; The other end of connecting line 2 is through the 3rd fixed pulley 4; Be connected with vibrator 1 through the through hole 18 on the oblique gripper shoe 13, the 3rd said Japanese 12 connecting plate 15 is connected with receiving carrier 14 through connecting line 2; Second said Japanese 12 connecting plate 7 is connected through the top of jack 9 with pressure sensor 10, and the bottom of said pressure sensor 10 is arranged on the L type baffle plate 11.
In order to guarantee vibrator 1 preloading stable in applying mechanism, be provided with circular groove 22 in the center of second said Japanese 12 connecting plate 7, said circular groove 22 is corresponding with the top of jack 9.
Do not rock in loading procedure in order to ensure jack 9, in said circular groove 22, be provided with spring 21; In dynamic loading test; Spring 21 can be owing to the amplitude variations of vibrator 1 is extended or compressed; Avoid Japanese 12 and jack 9 disengagings; Spring 21 strokes need be considered the stake top displacement under peak swing and the dynamic load effect, and spring 21 rigidity Design values are not less than 2～3 times of Hooke's law calculated value.
In order before test, the oblique gripper shoe 13 of the utility model to be fixed on the fixed support, guarantee its safety and firmness; Fixed end 3 in said oblique gripper shoe 13 is provided with circular hole 25, and screw rod is fixed on oblique gripper shoe 13 on the fixed support through circular hole 25.
The model that said vibrator 1 adopts is: JZK-50, the model that said pressure sensor 10 adopts is: the DYB-2D resistance strain type pressure sensor.
The course of work below in conjunction with description of drawings the utility model:
1. static loading test
In the static loading test process,,, applying of oblique pulling force carried out in stake through the transmission of exertin through 9 pairs Japanese 12 effect of jack.Through the reading of pressure sensor 10, just can obtain add the numerical value of load, its Load Transfer is as shown in Figure 7.
Wherein, F
P=F
1, F
1=2F
2, F
2'=F
2, F
2'=F
3', F
3'=F
3, F
1'=2F
3, F
1'=F
w, that is: F
1=F
p=F
w
In the formula, F
1Be the power that jack applies, F
pBe the end reaction of L type baffle plate, i.e. the measured power of pressure sensor, F to jack
1' with F
wFor connecting the 3rd connecting plate and a pair of counter-force that receives on the connecting line of carrier, then F
wFor receiving the suffered power of carrier.
2. dynamic loading test
In the dynamic loading test process, generally need apply different preloadings, the utility model adopts manual spiral jack 9 to carry out applying of preloading; Through downward promotion L type baffle plate 11, upwards promote second connecting plate 7, add the stake top and apply inclined load in advance.Jack 9 is given the pre-applied force that receives carrier 14 certain earlier, and the spring 21 in second connecting plate 7 can be compressed, and this moment, whole system was in equilibrium state.Apply power through 1 pair first connecting plate 5 of vibrator then, this power transmits through connecting line 2; Through the transmission of power, dynamic load promptly can be delivered to and receive carrier 14, and the said carrier 14 that receives is pile foundation, and its Load Transfer is as shown in Figure 8.
Wherein, earlier second connecting plate 7 is applied static(al) F
1, the transmittance process of power is identical with form in the static loading test, at this moment, reads the reading F of pressure sensor 10
pAfterwards first connecting plate 5 is applied dynamic load F
0, F
0Be the one-period fluctuating load.
Wherein, F
0=2F
m, F
m=F
m', F
m'=F
n', F
n'=F
n, that is: F
0=2F
n
Because F
1Effect, make the spring 21 on second connecting plate 7 be in compressive state, work as F
0During increase, i.e. F
nIncrease F
nSpur second connecting plate 7, make spring 21 begin progressively to reply from compressive state, in the Recovery Process, the effect of 21 pairs of jack 9 of spring reduces, then F
1Can reduce; Work as F
0When increasing to maximum value, F
1Minimum value, F subsequently appear
0Can reduce gradually, and spring 21 can be compressed once more F
1Value can slowly become big, work as F
0Be reduced to F at 0 o'clock
1Return to initial value.
F during then a certain moment
0=F
p-F
p';
In the formula, F
pBe the initial value of pressure sensor, promptly do not apply power F
0The time numerical value, F
p' for applying F
0The reading value of the pressure sensor in a certain moment of back.
Use the oblique dynamic load load testing machine of pile foundation of the utility model to carry out power, the static load test on screw pile basis, its part test data are seen table 1～table 4.The wide ratio of 1# screw pile blade pitch that uses in the test is 3.14, and the wide ratio of 2# screw pile blade pitch is 5.
In the test,, again stake is applied oblique power having under the prerequisite of preloading; Between stake top horizontal movement and the exciting number of times certain rule is arranged, stake top horizontal movement meeting increases along with the increase of exciting number of times, and exciting initial stage shift value changes greatly; When exciting 1000 times; Change in displacement trend obviously reduces, and explains that pile peripheral earth is compacted under the exciting effect gradually, thereby has improved the shear strength of the soil body; This phenomenon shows that the experimental rig of the utility model can effectively pass to pile body with dynamic loading, has realized the oblique power of stake is applied.
After dynamic load applies end, again the stake top is applied oblique dead load step by step.Judge the ultimate load value of stake through load-displacement curve, and analyze the influence of dynamic action the pile foundation ultimate bearing capacity.
Table 1 1# screw pile 60% adds the exciting number of times and stake top horizontal movement of ultimate load in advance
Table 2 1# screw pile 60% adds static load test data behind the exciting of ultimate load in advance
Table 3 2# screw pile 60% adds the exciting number of times and stake top horizontal movement of ultimate load in advance
Table 4 2# screw pile 60% adds static load test data behind the exciting of ultimate load in advance
Claims (4)
1. oblique dynamic load load testing machine of pile foundation; It is characterized in that comprising oblique gripper shoe, Japanese, jack, vibrator, L type baffle plate and pressure sensor; The bottom of said oblique gripper shoe is connected with L type baffle plate, is respectively arranged with first fixed pulley and second fixed pulley in the both sides of said L type baffle plate; Form by first connecting plate, second connecting plate, the 3rd connecting plate, first screw rod and second screw rod for said Japanese; The two ends of said first connecting plate, second connecting plate and the 3rd connecting plate are respectively arranged with manhole; Said first screw rod is through the manhole of first connecting plate, second connecting plate and the 3rd connecting plate one side; And through fixed by nut, said second screw rod passes through the manhole of first connecting plate, second connecting plate and the 3rd connecting plate opposite side, and passes through fixed by nut; First said Japanese the screw rod is taken and is placed on first fixed pulley; Second screw rod is taken and is placed on second fixed pulley; The top center line on the inclined-plane of said oblique gripper shoe is provided with the 3rd fixed pulley, and the oblique gripper shoe directly over said the 3rd fixed pulley is provided with through hole; First said Japanese the connecting plate is connected with an end of connecting line, and the other end of connecting line is connected with vibrator through the through hole on the oblique gripper shoe through the 3rd fixed pulley, and the 3rd said Japanese connecting plate is connected with receiving carrier through connecting line; Second said Japanese the connecting plate is connected with the top of pressure sensor through jack, and the bottom of said pressure sensor is arranged on the L type baffle plate.
2. the oblique dynamic load load testing machine of a kind of pile foundation according to claim 1 is characterized in that being provided with circular groove in the center of second said Japanese the connecting plate, and said circular groove is corresponding with the top of jack.
3. the oblique dynamic load load testing machine of a kind of pile foundation according to claim 2 is characterized in that in said circular groove, being provided with spring.
4. the oblique dynamic load load testing machine of a kind of pile foundation according to claim 1 is characterized in that said oblique gripper shoe and L type baffle plate link together through bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200186863U CN202492862U (en) | 2012-01-16 | 2012-01-16 | Loading test device of slant dynamic load of pile foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200186863U CN202492862U (en) | 2012-01-16 | 2012-01-16 | Loading test device of slant dynamic load of pile foundation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202492862U true CN202492862U (en) | 2012-10-17 |
Family
ID=46999097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200186863U Withdrawn - After Issue CN202492862U (en) | 2012-01-16 | 2012-01-16 | Loading test device of slant dynamic load of pile foundation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202492862U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102535531A (en) * | 2012-01-16 | 2012-07-04 | 辽宁省交通高等专科学校 | Loading test device of inclined dynamic load of pile foundation |
| CN102966126A (en) * | 2012-11-27 | 2013-03-13 | 中国电力科学研究院 | Up-pull static load test method for power transmission line tower foundation |
| CN103290864A (en) * | 2013-06-14 | 2013-09-11 | 东南大学 | Device suitable for horizontal and vertical combined loading of pile foundation |
-
2012
- 2012-01-16 CN CN2012200186863U patent/CN202492862U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102535531A (en) * | 2012-01-16 | 2012-07-04 | 辽宁省交通高等专科学校 | Loading test device of inclined dynamic load of pile foundation |
| CN102535531B (en) * | 2012-01-16 | 2014-03-05 | 辽宁省交通高等专科学校 | Loading test device of inclined dynamic load of pile foundation |
| CN102966126A (en) * | 2012-11-27 | 2013-03-13 | 中国电力科学研究院 | Up-pull static load test method for power transmission line tower foundation |
| CN102966126B (en) * | 2012-11-27 | 2015-09-02 | 国家电网公司 | Up-pull static load test method for power transmission line tower foundation |
| CN103290864A (en) * | 2013-06-14 | 2013-09-11 | 东南大学 | Device suitable for horizontal and vertical combined loading of pile foundation |
| CN103290864B (en) * | 2013-06-14 | 2015-07-01 | 东南大学 | Device suitable for horizontal and vertical combined loading of pile foundation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20121017 Effective date of abandoning: 20140305 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20121017 Effective date of abandoning: 20140305 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |