CN207194039U - Piled-box foundaton horizontal cyclic load testing machine - Google Patents
Piled-box foundaton horizontal cyclic load testing machine Download PDFInfo
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- CN207194039U CN207194039U CN201720809915.6U CN201720809915U CN207194039U CN 207194039 U CN207194039 U CN 207194039U CN 201720809915 U CN201720809915 U CN 201720809915U CN 207194039 U CN207194039 U CN 207194039U
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model discloses a kind of Piled-box foundaton horizontal cyclic load testing machine, model casing (1) including upper opening, filling experiment soil (4) in it, experiment is with native (4) above coated with sand-gravel cushion (12), caisson (3) is placed on sand-gravel cushion (12), also include more test piles (2), test pile (2) the bottom embedment experiment is with native (4), top is stretched into sand-gravel cushion (12), also include weights (11) and be fixed on first fixed pulley (8) of model casing (1) side upper end, the weights (11) are fixedly connected by the steel strand wires around the first fixed pulley (8) with caisson (3) side；Also include the torque load maintainer that variable torque is provided and the second fixed pulley (21) for being fixed on model casing (1) opposite side upper end, the torque load maintainer is fixedly connected by the steel strand wires around the second fixed pulley (21) with the opposite side of caisson (3).Experimental rig of the present utility model, it is simple in construction, reliability is high.
Description
Technical field
The utility model belongs to Piled-box foundaton horizontal whirl-sprayed pile experimental rig technical field, particularly a kind of structure letter
Piled-box foundaton horizontal cyclic load testing machine single, reliability is high.
Background technology
It is a kind of new deep foundation pattern with bed course Piled-box foundaton compared to multi-column pier foundation and monomer caisson foundation, it has
There is higher Vertical Bearing Capacity, it is more economical compared with pile foundation while meeting that foundation settlement control requires, and disclosure satisfy that depth
The requirement of water bridge foundation shock insulation.The depth being thus more suitable under the complicated geological environments such as deep water, wave, current, earthquake, high wind
The deep water foundation engineering such as water Oversea bridge.
But deep water foundation engineering is acted on by the different frequencies such as earthquake, wave, circulation amplitude and number for a long time, meeting
Produce horizontal cyclic accumulation displacement, reduce the adverse effect such as foundation level bearing capacity.Field test is extremely multiple due to geological environment
It is miscellaneous, cost is high, influence factor is more etc. is often difficult to realize, it is therefore desirable to analyzed with reference to indoor model test, wherein closing
Key technology is how analog basis are acted on by different frequency, circulation amplitude and number.
Chinese utility model patent " frequency conversion horizontal cyclic load testing machine " (application number：It is 201620167184.5 open
Day：2016.8.31 a kind of long period horizontal cyclic load test research for marine single pile indoor model test) is disclosed
Device, it has the Model Pile being placed in tank, is connected to some load maintainer groups in Model Pile, load maintainer group is by being symmetrically connected to
One gravitational load mechanism of Model Pile both sides and a torque load maintainer composition；Gravitational load mechanism has the He of weight block I
Steel wire rope I, the end of steel wire rope I 1 are connected to Model Pile, other end connection weight block I, and the steel wire rope I is hung on pulley I, and pulley I passes through
Connecting rod I and rigid loading frame are fixed on ground.Its torque load maintainer includes steel wire rope II and gravity center shift mechanism, and center of gravity becomes
Change mechanism and ground, and gravity center shift mechanism are fixed on rigid loading frame through steel wire rope ‖ link model stakes, gravity center shift mechanism
Rotatably it is connected by horizontally disposed rotating shaft between rigid loading frame.Gravity center shift mechanism has line slideway, counterweight
Disk and the weight block II being placed on scale pan, wherein line slideway one end are rotatably connected rigid loading frame through rotating shaft, straight line
Guide rail is connected with steel wire rope II, and scale pan is movably disposed within line slideway, and being connected on the scale pan can drive scale pan to make
The actuating mechanism of movement away from or close to rotating shaft.
There are the following problems for the experimental rig：1st, because the experimental rig can only be confined to load amplitude (10N~100N)
Loading during smaller situation, and for Piled-box foundaton in experimental study, not only being conducted oneself with dignity by caisson, it is vertical to also suffer from
Load, this is also consistent with actual conditions, if Piled-box foundaton when the horizontal loading amplitude being subject to during experimental study is smaller, no
Beneficial to showing force-mechanism and the METHOD FOR LARGE DEFORMATION ELASTOPLASTIC rule of development of the Piled-box foundaton under horizontal whirl-sprayed pile effect, therefore it is inapplicable
Loaded in the horizontal cyclic of Piled-box foundaton；2nd, by the actuating mechanism being connected on scale pan to realize weight when the experimental rig loads
Code block and scale pan do mechanical reciprocation, therefore acting frequency is low, it is difficult to the cyclic load such as real simulation reality apoplexy, wave；
3rd, the experimental rig reduces the precision of device in itself by the conversion between a series of pulley and counterweight；4th, its torque adds
Mounted mechanism is complicated, and reliability is low, and the frequency of loading, number, amplitude etc. are restricted.
The content of the invention
The purpose of this utility model is to provide a kind of Piled-box foundaton horizontal cyclic load testing machine, simple in construction, can
By property height.
The technical solution for realizing the utility model purpose is：
A kind of Piled-box foundaton horizontal cyclic load testing machine, include the model casing 1 of upper opening, filling experiment use in it
Soil 4, experiment, above coated with sand-gravel cushion 12, place caisson 3, in addition to more test piles 2, institute with soil 4 on sand-gravel cushion 12
State in the bottom of test pile 2 embedment experiment soil 4, top is stretched into sand-gravel cushion 12, and the thickness of the sand-gravel cushion 12 is experiment
Two times of 2 diameters of stake, the length that test pile 2 stretches into the part of sand-gravel cushion 12 is equal with its diameter, in addition to the He of weights 11
The first fixed pulley 8 of the side upper end of model casing 1 is fixed on, the weights 11 pass through the steel strand wires around the first fixed pulley 8
It is fixedly connected with the side of caisson 3；Also include providing the torque load maintainer of variable torque and be fixed on the opposite side upper end of model casing 1
The second fixed pulley 21, the torque load maintainer consolidated by the opposite side of steel strand wires and caisson 3 around the second fixed pulley 21
Fixed connection.
Compared with prior art, its remarkable advantage is the utility model：
1st, it is simple in construction, reliability is high：The utility model experimental rig can be by changing circulation amplitude, cycle-index, following
The conditions such as ring frequency so as to simulate the cyclic loads such as wind, wave, current and earthquake, and with simulation precision it is high, it is applied widely and
Advantages of simple structure and simple.
2nd, multipurpose：The utility model experimental rig, can be with addition to frequency conversion horizontal whirl-sprayed pile is applied to Piled-box foundaton
The loading of cyclic load is realized to pile foundation, open caisson, open caisson staking composite foundation etc..
3rd, it is directly perceived：Model casing is made using transparent toughened glass, and energy visual pattern shows Piled-box foundaton in horizontal cyclic
Force-mechanism and the METHOD FOR LARGE DEFORMATION ELASTOPLASTIC rule of development under load action, data collecting system can obtain accurate data and be easy to study
With analysis.
The utility model is described in further detail with reference to the accompanying drawings and detailed description.
Brief description of the drawings
Fig. 1 is that the structural representation of the utility model Piled-box foundaton horizontal cyclic load testing machine (is not shown torque to add
Mounted mechanism).
Fig. 2 is the detail of construction for the torque load maintainer being connected by steel strand wires with caisson in Fig. 1.
Fig. 3 is the top view of torque load maintainer shown in Fig. 2.
In figure, 1 model casing；2 test piles；3 caissons；4 experiments soil；5 foil gauges；6 dynamometers；7 displacement transducers；8
One fixed pulley；9 deformeters；10 computers；11 weights；12 sand-gravel cushions；13 plastic foams；14 bunchers；15 slide
Ball；16 counterweights；17 U-steel levers；18 bases；19 bull sticks；20 high speed cameras；21 second fixed pulleys；22 weights.
Embodiment
As shown in figure 1, the utility model Piled-box foundaton horizontal cyclic load testing machine, include the model casing of upper opening
1, filling experiment soil 4 in it, experiment, above coated with sand-gravel cushion 12, is placed caisson 3 on sand-gravel cushion 12, also wrapped with soil 4
More test piles 2 are included, the bottom of the test pile 2 embedment experiment is with soil 4, and top is stretched into sand-gravel cushion 12, the sandstone pad
The thickness of layer 12 is two times of the diameter of test pile 2, and the length that test pile 2 stretches into the part of sand-gravel cushion 12 is equal with its diameter, also
Including weights 11 and the first fixed pulley 8 for being fixed on the side upper end of model casing 1, the weights 11 are by around first
The steel strand wires of fixed pulley 8 are fixedly connected with the side of caisson 3；
Also include the torque load maintainer that variable torque is provided and the second fixed pulley for being fixed on the opposite side upper end of model casing 1
21, the torque load maintainer around the steel strand wires of the second fixed pulley 21 with the opposite side of caisson 3 by being fixedly connected.
As shown in Fig. 2 the torque load maintainer includes U-steel lever 17, base 18.
The U-steel lever 17 is fixed on base 18, and described utility model one end of U-steel lever utility model 17 is set
Buncher 14 can be horizontally rotated by having, and the other end is provided with counterweight 16, the rotating shaft connection swingle 19 of the buncher 14
One end, the other end of swingle 19 are provided with weights 22；
Chute is provided with along longitudinal direction on the U-steel lever 17, being provided with the chute can be along the cunning ball of chute slidably
15, the sliding ball 15 around the steel strand wires of the second fixed pulley 21 with the opposite side of caisson 3 by being fixedly connected.Profit is scribbled in chute
Lubrication prescription is to reduce the sassafras that rubs of sliding ball and cell wall.
Base 18 is fixed by the fixing bolt on ground, and it is fixed on triangle steel bracket.
As shown in Figure 2,3, the output shaft of the buncher 14 runs through the end of U-steel lever 17, and and swingle
19 are fixedly connected, and described counterweight 16 is installed on the other end of U-steel lever 17 by screw rod and positioning screw hole.
Preferably, the buncher 14 is that frequency conversion adjusts motor.
As shown in figure 1, the displacement sensing for being used for measuring caisson displacement is provided between the fixed pulley 8 of caisson 3 and first
Device 7, the dynamometer 6 for being used for measuring horizontal whirl-sprayed pile is provided between the caisson 3 and torque load maintainer, described in every
Multiple foil gauges 5 are posted on test pile 2, the strain of the foil gauge 5 can be surveyed by deformeter 9 and computer 10 reads.
The one end of institute's displacement sensors 7 and the wall contacts of caisson 3, the other end are connected to the inner side of model casing 1.
Preferably, the foil gauge 5 is pasted onto the both sides of test pile 2 in pairs.
Preferably, the model casing 1 at least one side is transparent toughened glass.
The front of model casing 1 uses transparent toughened glass, and remaining can be made up of steel plate on four sides.
The model casing 1 is externally provided with for being tracked shooting to the experiment soil 4 in loading procedure and sand-gravel cushion 12
High-speed digital camera 20, the transparent toughened glass side of 20 face model casing of high-speed digital camera 1.
Foamed plastics 13 is provided between the periphery of sand-gravel cushion 12 and the inwall of model casing 1.
Foamed plastics 13 is placed in the inwall of model casing 1, to eliminate the Horizontal limiting of sand-gravel cushion 12.
The operating process of the utility model Piled-box foundaton frequency conversion horizontal cyclic load testing machine is as follows：
(1) experiment soil layering is laid in model casing using control certain knockout height, then test pile is pre-buried
Enter in experiment soil, pile body inwall symmetrically sticks foil gauge, place set in advance and depth localization is pressed in test flume, in mould
Type stake stake top lays sand-gravel cushion sample preparation, and flattens sand-gravel cushion surface；
(2) caisson, loading device and measuring equipment are laid by the position specified on sand-gravel cushion；
(3) during on-test, steel wire rope connects the cunning ball of U-steel lever system by fixed pulley, necessarily big by counterweight
Small counterweight, then adjustment hammer, is allowed to horizontal, then design follows using counterweight and weights regulation U-steel lever
Ring loading amplitude etc., then starts buncher and adjusts its swing circle to realize any loading frequency, turned by buncher
Dynamic to drive swingle to rotate so as to drive weights to do the circular motion of horizontal plane, now lever system output is in sinusoidal variations
Power.According to lever balance theory, the horizontal loading for being applied to caisson is F2 and F1 difference, and wherein F2 is by left side leverage
System is provided, and F1 is provided by the right weights.In rotation process, horizontal loading the changing with F2 and F1 differences suffered by caisson
Become and constantly change, so as to realize that horizontal cyclic loads.
(4) when testing, connected by the foil gauge of deformeter and test pile, and be connected with computer, you can instantaneous acquiring
The data that Piled-box foundaton deforms during horizontal cyclic loads.
(5) during experiment, high speed camera is set up in model casing front, through safety glass to the sand in loading procedure
Stone bed course, experiment are tracked shooting with soil and stake, and shooting photo is tested using image relevant treatment software analysis, and then intuitively
Image shows force-mechanism and the METHOD FOR LARGE DEFORMATION ELASTOPLASTIC rule of development of the Piled-box foundaton under horizontal whirl-sprayed pile effect.
Claims (10)
1. a kind of Piled-box foundaton horizontal cyclic load testing machine, include the model casing (1) of upper opening, filling experiment use in it
Above coated with sand-gravel cushion (12), caisson (3), in addition to more are placed on sand-gravel cushion (12) with native (4) for native (4), experiment
Test pile (2), test pile (2) the bottom embedment experiment is with native (4), and top is stretched into sand-gravel cushion (12), the sandstone
The thickness of bed course (12) is two times of test pile (2) diameter, and the length that test pile (2) stretches into sand-gravel cushion (12) part is straight with it
Footpath is equal,
It is characterized in that：
Also include weights (11) and be fixed on first fixed pulley (8) of model casing (1) side upper end, the weights
(11) it is fixedly connected by the steel strand wires around the first fixed pulley (8) with caisson (3) side；
Also include the torque load maintainer that variable torque is provided and the second fixed pulley for being fixed on model casing (1) opposite side upper end
(21), the torque load maintainer is fixedly connected by the steel strand wires around the second fixed pulley (21) with the opposite side of caisson (3).
2. experimental rig according to claim 1, it is characterised in that：
The torque load maintainer includes U-steel lever (17), base (18)；
The U-steel lever (17) is fixed on base (18), and described U-steel lever (17) one end, which is provided with, can horizontally rotate tune
Speed motor (14), the other end are provided with counterweight (16), one end of the rotating shaft connection swingle (19) of the buncher (14), rotation
The other end of bull stick (19) is provided with weights (22)；
Chute is provided with along longitudinal direction on the U-steel lever (17), being provided with the chute can be along the cunning ball of chute slidably
(15), the sliding ball (15) is fixedly connected by the steel strand wires around the second fixed pulley (21) with the opposite side of caisson (3).
3. experimental rig according to claim 2, it is characterised in that：
The output shaft of the buncher (14) runs through the end of U-steel lever (17), and is fixedly connected with swingle (19),
Described counterweight (16) is installed on U-steel lever (17) other end by screw rod and positioning screw hole.
4. experimental rig according to claim 3, it is characterised in that：
The buncher (14) is that frequency conversion adjusts motor.
5. experimental rig according to claim 1, it is characterised in that：
The displacement transducer (7) for being used for measuring caisson displacement is provided between the caisson (3) and the first fixed pulley (8), in institute
The dynamometer (6) for being provided between caisson (3) and torque load maintainer and being used for measuring horizontal whirl-sprayed pile is stated, in the every experiment
Multiple foil gauges (5) are posted in stake (2), the strain of the foil gauge (5) can be surveyed by deformeter (9) and computer (10) reads.
6. experimental rig according to claim 5, it is characterised in that：
Institute's displacement sensors (7) one end and caisson (3) wall contacts, the other end are connected on the inside of model casing (1).
7. experimental rig according to claim 5, it is characterised in that：
The foil gauge (5) is pasted onto the both sides of test pile (2) in pairs.
8. experimental rig according to claim 1, it is characterised in that：
The model casing (1) at least one side is transparent toughened glass.
9. experimental rig according to claim 1, it is characterised in that：
The model casing (1) is externally provided with for being tracked bat with native (4) and sand-gravel cushion (12) to the experiment in loading procedure
The high-speed digital camera (20) taken the photograph, high-speed digital camera (20) face model casing (1) the transparent toughened glass side.
10. experimental rig according to claim 1, it is characterised in that：
Foamed plastics (13) is provided between the sand-gravel cushion (12) periphery and model casing (1) inwall.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720809915.6U CN207194039U (en) | 2017-07-06 | 2017-07-06 | Piled-box foundaton horizontal cyclic load testing machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720809915.6U CN207194039U (en) | 2017-07-06 | 2017-07-06 | Piled-box foundaton horizontal cyclic load testing machine |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109024713A (en) * | 2018-06-12 | 2018-12-18 | 同济大学 | Simulate clump of piles dynamic effect and the coefficient device of Pile Soil and its analogy method |
| CN109269903A (en) * | 2018-09-20 | 2019-01-25 | 浙江大学 | Various boundary conditions Lower chains and the tangential drag test device of soil and method |
| CN109374418A (en) * | 2018-09-20 | 2019-02-22 | 浙江大学 | Equivalent Elasticity boundary Lower chains and native tangential and normal direction drag test device |
| CN109470550A (en) * | 2018-09-20 | 2019-03-15 | 浙江大学 | The experimental rig and test method that analog complex stress Lower chains and soil tangentially act on |
| CN109695262A (en) * | 2019-01-20 | 2019-04-30 | 西南交通大学 | A kind of prominent heavy experimental rig of simulation open caisson generation founding |
| CN110344452A (en) * | 2019-07-16 | 2019-10-18 | 广东工业大学 | A kind of bending measuring device and its measurement method |
| CN110424440A (en) * | 2019-08-23 | 2019-11-08 | 东北大学 | A kind of composite pile foundation basis of open caisson staking |
| CN110761342A (en) * | 2019-10-28 | 2020-02-07 | 中国地质大学（武汉） | System and method for stability research model test of foundation pit construction process under blasting load |
| CN111610144A (en) * | 2020-05-27 | 2020-09-01 | 交通运输部天津水运工程科学研究所 | Gravity type structural stability test bottom friction coefficient calibration system |
| CN111719602A (en) * | 2020-06-30 | 2020-09-29 | 扬州大学 | Pile foundation model loading device under complex load effect |
| CN111851605A (en) * | 2020-07-01 | 2020-10-30 | 扬州大学 | Pile foundation model loading device for vertical/horizontal cyclic loading |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109024713A (en) * | 2018-06-12 | 2018-12-18 | 同济大学 | Simulate clump of piles dynamic effect and the coefficient device of Pile Soil and its analogy method |
| CN109470550B (en) * | 2018-09-20 | 2020-06-19 | 浙江大学 | Test device and test method capable of simulating tangential action of anchor chain and soil under complex stress |
| CN109269903A (en) * | 2018-09-20 | 2019-01-25 | 浙江大学 | Various boundary conditions Lower chains and the tangential drag test device of soil and method |
| CN109374418A (en) * | 2018-09-20 | 2019-02-22 | 浙江大学 | Equivalent Elasticity boundary Lower chains and native tangential and normal direction drag test device |
| CN109470550A (en) * | 2018-09-20 | 2019-03-15 | 浙江大学 | The experimental rig and test method that analog complex stress Lower chains and soil tangentially act on |
| CN109695262A (en) * | 2019-01-20 | 2019-04-30 | 西南交通大学 | A kind of prominent heavy experimental rig of simulation open caisson generation founding |
| CN110344452A (en) * | 2019-07-16 | 2019-10-18 | 广东工业大学 | A kind of bending measuring device and its measurement method |
| CN110424440A (en) * | 2019-08-23 | 2019-11-08 | 东北大学 | A kind of composite pile foundation basis of open caisson staking |
| CN110761342A (en) * | 2019-10-28 | 2020-02-07 | 中国地质大学（武汉） | System and method for stability research model test of foundation pit construction process under blasting load |
| CN110761342B (en) * | 2019-10-28 | 2024-05-31 | 中国地质大学（武汉） | Stability research model test system and method for foundation pit construction process under blasting load |
| CN111610144A (en) * | 2020-05-27 | 2020-09-01 | 交通运输部天津水运工程科学研究所 | Gravity type structural stability test bottom friction coefficient calibration system |
| CN111610144B (en) * | 2020-05-27 | 2023-02-14 | 交通运输部天津水运工程科学研究所 | Gravity type structural stability test bottom friction coefficient calibration system |
| 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 |
| CN111851605A (en) * | 2020-07-01 | 2020-10-30 | 扬州大学 | Pile foundation model loading device for vertical/horizontal cyclic loading |
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