CN206512764U - A kind of horizontally loading test system for applying vertical load in stake top - Google Patents
A kind of horizontally loading test system for applying vertical load in stake top Download PDFInfo
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- CN206512764U CN206512764U CN201720162904.3U CN201720162904U CN206512764U CN 206512764 U CN206512764 U CN 206512764U CN 201720162904 U CN201720162904 U CN 201720162904U CN 206512764 U CN206512764 U CN 206512764U
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Abstract
The utility model discloses a kind of horizontally loading test system for applying vertical load in stake top, including static-loading test device and horizontally loading test device, when single pile bearing capacity vertical load is loaded onto the bearing capacity of single pile of design requirement, maintaining to carry out single pile horizontally loading test under conditions of vertical load is constant, test data is provided for optimization Pile Foundations Design.
Description
【Technical field】
The utility model belongs to industry and civil buildings pile detection field, is related to as the horizontal static load examination of building single pile
Test, more particularly to a kind of horizontally loading test system for applying vertical load in stake top.
【Background technology】
As pile foundation technology is continued to develop with theoretical, pile foundation turns into a kind of most commonly used basic shape of domestic and international application
Formula, its construction quality is related to the safety of superstructure.Pile foundation is collectively constituted by foundation pile with the cushion cap for being connected to stake top, pile bearing
In hard (basement rock, closely knit gravel layer) or the harder supporting course such as (hard plastic cohesive soil, in close sand), with very high perpendicular
It is conventional to bearing capacity of single pile or Bearing Capacity of Pile Groups, it is sufficient to undertake whole vertical loads (including eccentric load) of skyscraper
Pile-type mainly have precast reinforced concrete pile, prestressed reinforced concrete stake, bore (punching) hole pouring pile, manually digging hole filling pile,
Steel-pipe pile etc..In Design of Foundation, when pile foundation bears horizontal loading, horizontal bearing capacity checking computations should be carried out to pile foundation.According to
《JGJ106-2014 architecture foundation pile inspection specifications》3.1.1 provision provides that pile detection should be according to testing goal, detection side
The applicability of method, the design condition of pile foundation, pile-formation process etc., reasonable selection single pile bearing capacity, single-pile vertical orientation resist
Pull out the detection methods such as static test, single pile horizontally loading test；3.3.8 bar is provided, the pile foundation work to being designed with horizontal force requirement
Journey, should be using the detection of single pile horizontally loading test.
The horizontal force resistant and bending resistance of stake depend on stake and native mechanical property, the free degree of stake, bending rigidity, stake
The factors such as wide, stake top constraint, experimental condition should be as close with actual operating conditions as possible, and various influences are reduced into minimum journey
Degree, enables test result to try one's best and reflects the actual conditions of engineering pile.Under normal circumstances, experimental condition is difficult to accomplish and engineering pile
Situation is completely the same,《JGJ106-2014 architecture foundation pile inspection specifications》The horizontal static load of single pile is tried Deng current design criteria specification
Test and proposed in the case where stake top is in free state.
In most of pile foundation engineerings, the design of pile foundation is generally controlled by vertical load, but for the cooling tower of thermal power plant
Deng structures, vertical load is tended to meet and required, because the horizontal loading born is larger, Pile Foundations Design now is by horizontal lotus
Control action is carried.Existing test data shows that when stake top applies vertical load, horizontal bearing capacity of single pile is greatly improved.
Therefore, carry out the horizontally loading test of stake top application vertical load has important practical meaning in engineering to optimization Pile Foundations Design.
【Utility model content】
The purpose of this utility model is to provide a kind of horizontally loading test system for applying vertical load in stake top, is easy to
Carry out the horizontally loading test that stake top applies vertical load, test data is provided for optimization Pile Foundations Design.
To reach above-mentioned purpose, the utility model is adopted the following technical scheme that：
A kind of horizontally loading test system for applying vertical load in stake top, including static-loading test device and water
Flat static-load testing device；
Static-loading test device includes vertical load counter force system, loading and voltage-stabilizing system and observation system；Hang down
Straight load counter force system uses anchor pile beam counterforce device, the cloth by the way of 4 anchoring piles and 1 static-loading test stake
Put, 4 anchoring pile equidistant placements are in 1 static-loading test stake surrounding, static-loading test pile center and anchoring pile
The distance between heart is more than 4D and more than 2.0m, and D is static-loading test stake diameter, and middle 1 is erected by 4 anchoring piles
Apply counter-force to compressive static load test stake；
The loading of static-loading test device and voltage-stabilizing system include applying vertical load jack, girder, auxiliary girder
With vertical load measuring instrument equipment；4 anchoring piles are connected by girder, auxiliary girder, jack is installed in the geometry of 4 anchoring piles
The heart, vertical load measuring instrument equipment is arranged between jack and static-loading test stake, by jack by load
Static-loading test stake is put on, by vertical load measuring instrument equipment control load, load passes sequentially through girder, pair
Beam is transferred to 4 anchoring piles；
Static-loading test observation system includes reference stake, datum line beam and vertical displacement observation instrument equipment；Two
Fixed reference beam on reference stake, datum line beam is arranged near static-loading test stake, and vertical displacement observation instrument equipment connects
It is connected on static-loading test stake and datum line beam；
Horizontally loading test device includes horizontal loading counter force system, loading and voltage-stabilizing system and observation system；Horizontal lotus
Carrying counter force system includes counter-force concret block, and counter-force is provided by counter-force concret block and the wall soil body of testing pits；
The loading of horizontally loading test device and voltage-stabilizing system, which include application horizontal loading Horizontal jack, jack, to be fixed
Device and horizontal loading measuring instrument equipment, apply horizontal loading Horizontal jack and pass through jack fixing device and vertical compression
Static test stake connection, horizontal loading measuring instrument equipment, which is arranged on, applies horizontal loading Horizontal jack and vertical compression static load
Between test pile；
During the application of horizontally loading test horizontal force, pass through the anti-friction in static-loading test stake top
Brush assembly overcomes constraint of the vertical load to stake top horizontal direction；
Horizontally loading test device includes horizontal displacement observation instrument and equipment, and horizontal displacement observation instrument and equipment is connected to perpendicular
To in compressive static load test stake and datum line beam.
Further, the jack fixing device includes steel cushion block and spherical hinged-support, applies horizontal loading horizontal very heavy
Top is connected by steel cushion block and spherical hinged-support with static-loading test stake.
Further, there is stalloy using expansion bolt anchoring on static-loading test stake pile body, stalloy surface is adopted
Sheet glass is fixed with butter or vaseline, vertical displacement observation instrument equipment is installed on the glass sheet.
Further, horizontal displacement observation instrument and equipment and vertical displacement the observation instrument equipment is that dial gauge or displacement are passed
Sensor, its scale division value/resolving power is superior or equal to 0.01mm.
Further, the horizontally loading test device is arranged in the testing pits of subsurface 2.0m.
Further, the application horizontal loading Horizontal jack is Horizontal jack.
The horizontally loading test system of the present utility model for applying vertical load in stake top, including static-loading test
Device and horizontally loading test device, the single pile bearing of design requirement is loaded onto in single pile bearing capacity vertical load
During power characteristic value, maintaining to carry out single pile horizontally loading test under conditions of vertical load is constant, provided for optimization Pile Foundations Design
Test data.
【Brief description of the drawings】
Fig. 1 is the horizontally loading test system schematic that the utility model stake top applies vertical load；
The horizontally loading test equipment that Fig. 1 a stake tops apply vertical load installs top view；Fig. 1 b stake tops apply vertical load
Horizontally loading test observation device side view；
In figure：1 is girder；2 be auxiliary girder；3 be vertical load measuring instrument equipment；4 be application vertical load jack；5
For anti-friction brush assembly；6 be static-loading test stake；7 be anchoring pile；Stake on the basis of 8；Beam on the basis of 9；10 be that vertical displacement is seen
Survey instrument and equipment；11 be counter-force concret block；12 be application horizontal loading Horizontal jack；13 be horizontal loading measuring instrument
Equipment；14 be steel cushion block；15 be spherical hinged-support；16 be horizontal displacement observation instrument and equipment.
【Embodiment】
With reference to the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out clear
Chu, complete description, embodiment described herein are only a part of embodiment of the present utility model, and not all implementation
Example.Based on the embodiment in the utility model, what those of ordinary skill in the art were obtained under the premise of no creative work
Every other embodiment, belongs to the utility model protection domain.
The utility model applies the horizontally loading test system of vertical load, including static-loading test dress in stake top
Put with horizontally loading test device, static-loading test device by vertical load counter force system, loading and voltage-stabilizing system and
Observation system is constituted；Horizontally loading test device is made up of horizontal loading counter force system, loading and voltage-stabilizing system and observation system；
When single pile bearing capacity vertical load is loaded onto the bearing capacity of single pile of design requirement, vertical lotus is being maintained
Single pile horizontally loading test is carried out under conditions of load is constant.
Vertical load counter force system uses anchor pile beam counterforce device, is tried using 4 anchoring piles 7 and 1 vertical compression static load
The mode for testing stake 6 arranges that 4 equidistant placements of anchoring pile 7 are in 1 static-loading test 6 surrounding of stake, static-loading test
The distance between 6 centers of stake and the center of anchoring pile 7 are more than 4D and more than 2.0m, and D is static-loading test 6 diameters of stake, passes through 4
7 pairs of root anchoring pile centre 1 static-loading test stake 6 applies counter-force；
The loading of static-loading test device and voltage-stabilizing system include applying vertical load jack 4, girder 1, pair
Beam 2 and vertical load measuring instrument equipment 3；4 anchoring piles 7 are connected by girder 1, auxiliary girder 2, jack 4 is installed on 4 anchoring piles
7 geometric center, vertical load measuring instrument equipment 3 is arranged between jack 4 and static-loading test stake 6, is passed through
Load is put on static-loading test stake 6 by jack 4, passes through the control load of vertical load measuring instrument equipment 3, load
Pass sequentially through girder 1, auxiliary girder 2 and be transferred to 4 anchoring piles 7；
Static-loading test observation system includes reference stake 8, datum line beam 9 and vertical displacement observation instrument equipment 10；
The fixed reference beam 9 on two reference stakes 8, datum line beam 9 is arranged near static-loading test stake 6, vertical displacement visualizer
Device equipment 10 is connected on static-loading test stake 6 and datum line beam 9；
It is solid that the loading of horizontally loading test device and voltage-stabilizing system include application horizontal loading Horizontal jack 12, jack
Determine device and horizontal loading measuring instrument equipment 13, apply horizontal loading Horizontal jack 12 by jack fixing device with erecting
Connected to compressive static load test stake 6, horizontal loading measuring instrument equipment 13, which is arranged on, applies the He of horizontal loading Horizontal jack 12
Between static-loading test stake 6；
Horizontally loading test device includes horizontal displacement observation instrument and equipment 16, and horizontal displacement observation instrument and equipment 16 is connected
In static-loading test stake 6 and datum line beam 9.
Further, horizontal displacement observation instrument and equipment 16, pedestal are respectively mounted at horizontal force action face and above 50cm
Pile body is anchored at using diameter 10mm~12mm expansion bolts, expansion bolt exposed section weld size 100mm parallel to the ground ×
100mm thickness 5mm stalloys, stalloy surface uses butter or vaseline fixed dimension 100mm × 100mm thickness 3mm~5mm glass
Glass piece is used to install horizontal displacement observation instrument and equipment 16.The horizontal displacement observation instrument and equipment 16 and vertical displacement visualizer
Device equipment 10 is dial gauge or displacement transducer, and its scale division value/resolving power is superior or equal to 0.01mm.
The jack fixing device includes steel cushion block 14 and spherical hinged-support 15, applies horizontal loading Horizontal jack 12
It is connected by steel cushion block 14 and spherical hinged-support 15 with static-loading test stake 6.
Illustrate the utility model content below by way of specific embodiment.
Shown in Figure 1, the horizontally loading test equipment that Fig. 1 a stake tops apply vertical load installs top view, Fig. 1 b stake tops
Apply the horizontally loading test observation device side view of vertical load.Before testing equipment installation, first in vertical compression static load
Excavate and test pits in the surrounding subsurface 2.0m of test pile 6, size is width 2m, long 4~5m, depth 2m, observation horizontal displacement side can
For arc.Static-loading test loading facilities is installed using two or more hydraulic jacks parallel connection synchronous working
Jack is made a concerted effort geometric center of the center for 4 anchoring piles 7, and applying vertical load jack 4, that load is put on into vertical compression is quiet
Carry test pile 6, while by the control load of the vertical load measuring instrument such as force snesor equipment 3, load pass sequentially through girder 1,
Auxiliary girder 2 is transferred to anchoring pile 7.It is being more than 4 times of stake footpaths and more than setting reference stake at 2.0m away from 6 centers of static-loading test stake
8, by the fixed reference beam 9 of reference stake 8,4 dial gauges or displacement transducer etc. are installed on the top of static-loading test stake 6 and erected
To displacement observation instrument and equipment 10.Plus, off-load and data acquisition can be completed by test for static load instrument, static-loading test is performed
《JGJ106-2014 architecture foundation pile inspection specifications》Pertinent regulations.In single pile bearing capacity Vertical loading extremely
During the bearing capacity of single pile of design requirement (such as 4000kN), maintaining to be ready for single pile under conditions of vertical load is constant
Horizontally loading test.
Horizontally loading test subsurface 2.0m test pits it is interior carry out, horizontal thrust loading equipemtn uses Horizontal jack,
Apply horizontal loading Horizontal jack 12 and load is put on into counter-force concret block 11 and the wall soil body of testing pits, while being passed by power
The control load of the horizontal loading measuring instrument such as sensor equipment 13, load passes sequentially through steel cushion block 14, spherical hinged-support 15 and is transferred to
Static-loading test stake 6, disposes spherical hinged-support 15 in 6 contact positions of static-loading test stake, acts on jack
Power passes through pile body axis.During horizontal force application, pass through the friction resistant group on the top of static-loading test stake 6
Part 5 overcomes constraint of the vertical load to stake top horizontal direction, it is ensured that Accurate Determining horizontal displacement and equipment, testing crew safety.
It is being more than 4 times of stake footpaths and more than reference stake 8 is set at 2.0m away from 6 centers of static-loading test stake, is being fixed by reference stake 8
Datum line beam 9, is respectively mounted the horizontal displacement observation instrument such as dial gauge or displacement transducer at horizontal force action face and above 50cm
Device equipment 16, pedestal is anchored at pile body, the weldering parallel to the ground of expansion bolt exposed section using diameter 10mm~12mm expansion bolts
Connect size 100mm × 100mm thickness 5mm stalloys, stalloy surface using butter or vaseline fixed dimension 100mm ×
100mm thickness 3mm~5mm sheet glass is used to install displacement measuring instrument.Plus, off-load and data acquisition can be complete by test for static load instrument
Into horizontally loading test is performed《JGJ106-2014 architecture foundation pile inspection specifications》Pertinent regulations.
Above example is merely to illustrate the technical solution of the utility model rather than its limitations, although with reference to above-mentioned implementation
The utility model is described in detail example, and those of ordinary skill in the art still can be to of the present utility model specific
Embodiment is modified or equivalent substitution, and these without departing from the utility model spirit and scope any modification or
Equivalent substitution, it is within claims of the present utility model.
Claims (6)
1. a kind of horizontally loading test system for applying vertical load in stake top, it is characterised in that：Including the examination of vertical compression static load
Experiment device and horizontally loading test device；
Static-loading test device includes vertical load counter force system, loading and voltage-stabilizing system and observation system；Vertical lotus
Carry counter force system and use anchor pile beam counterforce device, by the way of 4 anchoring piles (7) and 1 static-loading test stake (6)
Arrangement, 4 anchoring pile (7) equidistant placements are in 1 static-loading test stake (6) surrounding, in static-loading test stake (6)
The distance between the heart and anchoring pile (7) center are more than 4D and more than 2.0m, and D is static-loading test stake (6) diameter, passes through 4
Root anchoring pile (7) applies counter-force to middle 1 static-loading test stake (6)；
The loading of static-loading test device and voltage-stabilizing system include applying vertical load jack (4), girder (1), pair
Beam (2) and vertical load measuring instrument equipment (3)；4 anchoring piles (7) are connected by girder (1), auxiliary girder (2), jack (4)
The geometric center of 4 anchoring piles (7) is installed on, vertical load measuring instrument equipment (3) is arranged on jack (4) and vertical compression is quiet
Carry between test pile (6), load is put on by static-loading test stake (6) by jack (4), surveyed by vertical load
Measuring appratus equipment (3) control load, load passes sequentially through girder (1), auxiliary girder (2) and is transferred to 4 anchoring piles (7)；
Static-loading test observation system includes reference stake (8), datum line beam (9) and vertical displacement observation instrument equipment
(10)；The fixed reference beam (9) on two reference stakes (8), datum line beam (9) is arranged near static-loading test stake (6), is erected
It is connected to displacement observation instrument and equipment (10) in static-loading test stake (6) and datum line beam (9)；
Horizontally loading test device includes horizontal loading counter force system, loading and voltage-stabilizing system and observation system；Horizontal loading is anti-
Force system includes counter-force concret block (11), and counter-force is provided by counter-force concret block (11) and the wall soil body of testing pits；
The loading of horizontally loading test device and voltage-stabilizing system, which include application horizontal loading Horizontal jack (12), jack, to be fixed
Device and horizontal loading measuring instrument equipment (13), apply horizontal loading Horizontal jack (12) by jack fixing device with
Static-loading test stake (6) connection, it is horizontal very heavy that horizontal loading measuring instrument equipment (13) is arranged on application horizontal loading
Push up between (12) and static-loading test stake (6)；During the application of horizontally loading test horizontal force, by installed in perpendicular
Overcome constraint of the vertical load to stake top horizontal direction to the anti-friction brush assembly (5) on compressive static load test stake (6) top；
Horizontally loading test device includes horizontal displacement observation instrument and equipment (16), horizontal displacement observation instrument and equipment (16) connection
In static-loading test stake (6) and datum line beam (9).
2. a kind of horizontally loading test system for applying vertical load in stake top according to claim 1, it is characterised in that：
The jack fixing device includes steel cushion block (14) and spherical hinged-support (15), applies horizontal loading Horizontal jack (12) and leads to
Steel cushion block (14) and spherical hinged-support (15) is crossed to be connected with static-loading test stake (6).
3. a kind of horizontally loading test system for applying vertical load in stake top according to claim 1, it is characterised in that：
There is stalloy using expansion bolt anchoring on static-loading test stake (6) pile body, stalloy surface uses butter or all scholars
Woods is fixed with sheet glass, and horizontal displacement observation instrument and equipment (16) is installed on the glass sheet.
4. a kind of horizontally loading test system for applying vertical load in stake top according to claim 1,2 or 3, its feature
It is：The horizontal displacement observation instrument and equipment (16) and vertical displacement observation instrument equipment (10) are dial gauge or displacement sensing
Device, its scale division value/resolving power is superior or equal to 0.01mm.
5. a kind of horizontally loading test system for applying vertical load in stake top according to claim 1,2 or 3, its feature
It is：It is interior that the horizontally loading test device is arranged in testing pits for subsurface 2.0m.
6. a kind of horizontally loading test system for applying vertical load in stake top according to claim 1,2 or 3, its feature
It is：The application horizontal loading Horizontal jack (12) is Horizontal jack.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107012899A (en) * | 2017-06-08 | 2017-08-04 | 攀枝花天誉工程检测有限公司 | Foundation pile static loading test system |
| CN107724442A (en) * | 2017-10-16 | 2018-02-23 | 浙江煤炭测绘院 | A kind of static load resistance to compression lotus experimental rig |
| CN109469123A (en) * | 2019-01-11 | 2019-03-15 | 深圳宏业基岩土科技股份有限公司 | A kind of self balancing device and test method of the pile foundation level load of double jack |
| CN109778923A (en) * | 2019-02-27 | 2019-05-21 | 河海大学 | A kind of foundation pile buckling critical load experimental rig and method |
| CN110541438A (en) * | 2019-09-27 | 2019-12-06 | 兰州交通大学 | Anti-slide pile horizontal load test device and method for measuring proportionality coefficient |
| CN111139879A (en) * | 2020-03-20 | 2020-05-12 | 淮安市建筑工程质量检测中心有限公司 | All-round electromechanical integrated foundation pile bearing capacity detection system and method |
| CN111650047A (en) * | 2020-07-09 | 2020-09-11 | 中国水利水电科学研究院 | Large-tonnage soil load test vertical counter-force loading device and loading method thereof |
| CN111535375B (en) * | 2020-05-22 | 2021-02-26 | 南京工业大学 | Pile foundation horizontal bearing capacity detection system and method |
| CN113818499A (en) * | 2021-11-01 | 2021-12-21 | 宁波工程学院 | Adjustable and stable force transmission device of anchor pile method |
| CN114658043A (en) * | 2022-03-07 | 2022-06-24 | 中国电建集团华东勘测设计研究院有限公司 | Pile-soil horizontal static load interaction analysis method based on T-bar p-y curve |
| CN114737622A (en) * | 2022-04-12 | 2022-07-12 | 中电建华东勘测设计院(深圳)有限公司 | Device and method for applying plane cyclic load and vertical load to pile structure and keeping pile top rotating freely |
| CN116122354A (en) * | 2023-04-14 | 2023-05-16 | 中建八局第二建设有限公司 | Single-pile hinged horizontal static load test device and test method thereof |
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| CN107012899A (en) * | 2017-06-08 | 2017-08-04 | 攀枝花天誉工程检测有限公司 | Foundation pile static loading test system |
| CN107724442A (en) * | 2017-10-16 | 2018-02-23 | 浙江煤炭测绘院 | A kind of static load resistance to compression lotus experimental rig |
| CN109469123A (en) * | 2019-01-11 | 2019-03-15 | 深圳宏业基岩土科技股份有限公司 | A kind of self balancing device and test method of the pile foundation level load of double jack |
| CN109469123B (en) * | 2019-01-11 | 2023-12-12 | 深圳宏业基岩土科技股份有限公司 | Self-balancing device for horizontal loading of pile foundation of double jack and testing method |
| CN109778923A (en) * | 2019-02-27 | 2019-05-21 | 河海大学 | A kind of foundation pile buckling critical load experimental rig and method |
| CN109778923B (en) * | 2019-02-27 | 2023-12-08 | 河海大学 | Foundation pile buckling critical load test device and method |
| CN110541438A (en) * | 2019-09-27 | 2019-12-06 | 兰州交通大学 | Anti-slide pile horizontal load test device and method for measuring proportionality coefficient |
| CN111139879B (en) * | 2020-03-20 | 2021-07-06 | 淮安市建筑工程质量检测中心有限公司 | All-round electromechanical integrated foundation pile bearing capacity detection system and method |
| CN111139879A (en) * | 2020-03-20 | 2020-05-12 | 淮安市建筑工程质量检测中心有限公司 | All-round electromechanical integrated foundation pile bearing capacity detection system and method |
| CN111535375B (en) * | 2020-05-22 | 2021-02-26 | 南京工业大学 | Pile foundation horizontal bearing capacity detection system and method |
| US20220011205A1 (en) * | 2020-07-09 | 2022-01-13 | China Institute Of Water Resources And Hydropower Research | Vertical counterforce loading device for large-tonnage soil material load test and loading method thereof |
| US11698329B2 (en) * | 2020-07-09 | 2023-07-11 | China Institute Of Water Resources And Hydropower Research | Vertical counterforce loading device for large-tonnage soil material load test and loading method thereof |
| CN111650047B (en) * | 2020-07-09 | 2020-12-22 | 中国水利水电科学研究院 | Large-tonnage soil load test vertical counter-force loading device and loading method thereof |
| CN111650047A (en) * | 2020-07-09 | 2020-09-11 | 中国水利水电科学研究院 | Large-tonnage soil load test vertical counter-force loading device and loading method thereof |
| CN113818499A (en) * | 2021-11-01 | 2021-12-21 | 宁波工程学院 | Adjustable and stable force transmission device of anchor pile method |
| CN114658043A (en) * | 2022-03-07 | 2022-06-24 | 中国电建集团华东勘测设计研究院有限公司 | Pile-soil horizontal static load interaction analysis method based on T-bar p-y curve |
| CN114737622A (en) * | 2022-04-12 | 2022-07-12 | 中电建华东勘测设计院(深圳)有限公司 | Device and method for applying plane cyclic load and vertical load to pile structure and keeping pile top rotating freely |
| CN114737622B (en) * | 2022-04-12 | 2023-11-21 | 中电建华东勘测设计院(深圳)有限公司 | Device and method for applying plane cyclic load and vertical load to pile structure and keeping pile top free rotation |
| CN116122354A (en) * | 2023-04-14 | 2023-05-16 | 中建八局第二建设有限公司 | Single-pile hinged horizontal static load test device and test method thereof |
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