CN106013270A - Combined load loading device for pile foundation in field testing - Google Patents
Combined load loading device for pile foundation in field testing Download PDFInfo
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- CN106013270A CN106013270A CN201610463028.8A CN201610463028A CN106013270A CN 106013270 A CN106013270 A CN 106013270A CN 201610463028 A CN201610463028 A CN 201610463028A CN 106013270 A CN106013270 A CN 106013270A
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- test pile
- pile foundation
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- horizontal
- loading
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
Abstract
The invention relates to a combined load loading device for a pile foundation in field testing. The combined load loading device is used for applying combined loads to single piles and pile groups in the loading and unloading process in various fields. The loading device comprises a vertical loading assembly, a horizontal loading assembly, a test pile vertical deformation measuring assembly and a test pile horizontal deformation measuring assembly, wherein the vertical loading assembly is used for applying vertical loads to the pile foundation in field testing, the horizontal loading assembly is used for applying horizontal loads to the pile foundation in field testing, the test pile vertical deformation measuring assembly is used for measuring the deformation after vertical loading of the test pile, and the test pile horizontal deformation measuring assembly is used for measuring the deformation after horizontal loading of the test pile. Compared with the prior art, the limitation of the singular loading direction in field loading tests through original test devices of the type is broken through, combined load tests can be carried out on various types of pile foundations in field testing, vertical and horizontal loads which are randomly combined can be applied in different loading sequences, and therefore the combined bearing performance of the pile foundation can be better analyzed.
Description
Technical field
The present invention relates to a kind of On-site Loading Test of Rc device, especially relating to one can be carried out scene test pile foundation
Different loading sequence, the load testing machines of various combination load.
Background technology
Along with the construction of the buildings or structures such as skyscraper, bridge and control tower, the group that top suffered by single pile is transmitted
Close load action increasingly to come into one's own in engineering practice.Combined load i.e. acts on the perpendicular of ground above pile body part
The load combined with arbitrary form to load, horizontal loading and three kinds of loads of moment load.Under combined load, perpendicular
Affect pile peripheral earth drag to load, simultaneously because pile deflection deformation appearance and produce additional bending moment, Jin Erying
Ring the Its ultimate bearing capacity of stake, and horizontal loading causes pile body horizontal distortion, in turn results in changing of pile peripheral earth drag
Become, and then affect the vertical location of stake.Owing to influencing each other between above-mentioned load component, cause holding of pile foundation
Carry much more complicated than one direction load stake of characteristic.The most less to this research, how to design under combined load
The problem that pile foundation has become general concern.The in the past research to combined load effect Single Pile bearer properties focus mostly in
Stress research to tilting load Single Pile, tilting load is vertical load and horizontal loading is executed with special ratios simultaneously
It is added in the load on stake top, is a kind of specific form of combined load.At present, lot of domestic and international scholar is to pure vertical lotus
Carry and carried out substantial amounts of exploration and research with the pile foundation bearer properties under pure horizontal loading, achieve a lot of achievement, but
Bearing capacity of pile foundation under combined load is studied relatively fewer.
There is many queries in the research to combined load at present, it is therefore necessary to further research combined load
The bearer properties of Single Pile.But the charger of the combined load used at present is the most complicated, as China is special
Profit ZL201410328079.0 discloses a kind of horizontal vertical loading device of pile foundation model test, including model casing,
Described model casing is provided with built with the sand identical with pile foundation construction scene soil property, the top of described model casing
Positioner, positioner adjusts Model Pile piling position in model casing, and Model Pile is executed by vertical loading device
Adding vertical load, described horizontal charger applies transverse load to Model Pile.Although but this patent can be preferably
Indoor model pile foundation is carried out horizontal load test and vertical load test, but owing to its parts are more, and
Need body of wall as the carrier of horizontal charger, it is impossible to meet on-the-spot test requirements document.
Summary of the invention
The one that the purpose of the present invention is contemplated to study the bearer properties of combined load Single Pile further and develops
Large-sized multifunction indoor scene test pile base combined load charger.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of on-the-spot test pile base combined load charger, for indoor test pile foundation is combined load,
It is characterized in that, described charger includes the vertical charging assembly that test pile foundation applies vertical load, to examination
Testing pile foundation and apply the horizontal addload assembly of horizontal loading, the test pile measuring the deflection after test pile vertically loads vertically becomes
Shape measures assembly, and the test pile horizontal distortion measuring the deflection after test pile horizontal addload measures assembly.
Described vertical charging assembly includes reaction beam and vertical loading unit, and described reaction beam is horizontally fixed on examination
Testing the top of pile foundation, described vertical loading unit connects reaction beam and test pile foundation top respectively, and to test pile
Base vertically loads.Reaction beam can be made up of channel-section steel, is fixed by anchoring pile.
Being additionally provided with roller bearing unit between reaction beam and vertical loading unit, this roller bearing unit is contacted anti-respectively by two pieces
Power beam and the backing plate of vertical loading unit, and the rolling shaft structure composition being arranged between described two pieces of backing plates.Due to
It is big that on-the-spot test pile foundation loads load tonnage, tests pile foundation and can produce horizontal displacement, arrange roller bearing list after horizontal addload
Unit can reduce the constraint to test pile horizontal direction of the upper end reaction beam with emission levels displacement, arrange roller bearing unit simultaneously
The loading centering facilitating reaction beam to be contacted by roller bearing unit with test pile, prevents bias, plays the effect that regulation loads.
Vertical loading unit can be vertical force jack.
Described horizontal addload assembly includes horizontal reacting force stake and horizontal addload unit, and described horizontal reacting force stake is vertical
Being arranged on one side of test pile foundation, described horizontal addload unit connects horizontal reacting force stake and test pile foundation respectively, and
To test pile foundation horizontal addload.Horizontal addload unit can be horizontal force jack.
Described horizontal addload unit is connected by ball pivot is fixing with test pile foundation.
Described test pile vertical deformation is measured assembly and is included being horizontally set on test pile foundation datum line beam on one side, and two
End is respectively fixedly connected with datum line beam and the vertical displacement dial gauge of test pile foundation.
The aspect ratio test pile foundation top short 180-220mm of height overhead on described datum line beam distance ground.
After vertical loading, test pile foundation can produce vertical displacement, arranges the aspect ratio test pile foundation on datum line beam distance ground
The top short 180-220mm of height overhead can ensure that datum line beam and test pile are perpendicular in test loading procedure
To keeping separate, it is to avoid the disturbance that the contact possible in test pile sinking watching of datum line beam causes.
Described test pile horizontal distortion is measured assembly and is included being vertically arranged in test pile foundation reference stake on one side, and two
End is respectively fixedly connected with reference stake and the horizontal displacement dial gauge of test pile foundation.
Compared with prior art, the invention have the advantages that
(1) it is provided with independent horizontal addload assembly and vertical charging assembly, it is possible to according to demand to on-the-spot pile foundation,
With different loading orders, apply the vertical of combination in any and horizontal loading, be combined loading test test, with
Preferably analyze pile foundation combination bearing characters, breach such assay device original to on-the-spot bearing test loading direction
Single restriction.
(2) simple in construction, volume is little: the whole load testing machine of the present invention is by multiple scattered parts groups
Part, when carrying out concrete test, by respectively by these parts and the basis set conjunction of test pile, realizing higher
The measurement of precision, is particularly well-suited to test indoor the test of pile foundation, and remarkable in economical benefits is simple to operation.
(3) compared with the contrast patent in background technology, the contrast patent in background technology is only capable of realizing indoor
Model pile foundation carries out loading horizontally and vertically, and its vertical load testing machine needs to be fixed on model casing, level
Charger needs to be fixed on laboratory wall, it is impossible to satisfied scene test pile foundation loads requirement, and scene is tried
Testing pile foundation and be further applied load huge, the present invention may be used at vertically arranged reaction beam and horizontally arranged horizontal reacting force stake
To meet the loading requirement to scene test pile foundation.
Accompanying drawing explanation
Fig. 1 is the main TV structure schematic diagram of the charger of the embodiment of the present invention 1；
Fig. 2 is the right TV structure schematic diagram of the charger of the embodiment of the present invention 1；
In figure, 1-reaction beam, 2-roller bearing unit, the vertical loading unit of 3-, 4-vertical displacement dial gauge, 5-level
Loading unit, 6-horizontal displacement dial gauge, 7-ball pivot, 8-horizontal reacting force stake, 9-datum line beam, 10-reference stake.
Detailed description of the invention
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment 1
A kind of on-the-spot test pile base combined load charger, its structure as depicted in figs. 1 and 2, is used for indoor
Test pile foundation be combined load, it is characterised in that charger includes test pile foundation is applied vertical load
Vertical charging assembly, applies the horizontal addload assembly of horizontal loading, after measurement test pile vertically loads to test pile foundation
Assembly is measured in the test pile vertical deformation of deflection, and the test pile level measuring the deflection after test pile horizontal addload becomes
Shape measures assembly；
Vertical charging assembly includes that the reaction beam 1 being sequentially connected with, roller bearing unit 2 and vertical loading unit 3 are (as perpendicular
To power jack), vertical loading unit 3 is also connected with testing pile foundation top, and loads test pile foundation vertical, rolling
Axle unit 2 is by the backing plate of two pieces of difference Contact reaction-force beams 1 with vertical loading unit 3, and is arranged on described two pieces
Rolling shaft structure composition between backing plate.
Horizontal addload assembly includes horizontal reacting force stake 8 and horizontal addload unit 5 (such as horizontal force jack), level
Counter-force stake 8 is vertically arranged in one side of test pile foundation, and horizontal addload unit 5 connects horizontal reacting force stake 8 and examination respectively
Test pile foundation, and to test pile foundation horizontal addload, horizontal addload unit 5 is connected by ball pivot 7 is fixing with test pile foundation.
Test pile vertical deformation is measured assembly and is included being horizontally set on test pile foundation datum line beam 9 on one side, and two ends are divided
Gu Ding not connect datum line beam 9 and the vertical displacement dial gauge 4 of test pile foundation, test pile horizontal distortion is measured assembly and is included
It is vertically arranged in test pile foundation reference stake 10 on one side, and two ends are respectively fixedly connected with reference stake 10 and test pile
The horizontal displacement dial gauge 6 of base.
When using above-mentioned charger to carry out loading test to indoor test pile foundation, specifically can include following step
Rapid:
First at a certain distance from distance test (DT) pile foundation, horizontal reacting force stake 8 is squeezed into according to test requirements document, the most to be measured
Stake week digs out correspondingly sized test flume, reserves and be available for horizontal addload list between test pile foundation and horizontal reacting force stake 8
The platforms that unit 5 places, are positioned over horizontal addload unit 5 on platform, and by ball pivot 7 and cushion block respectively with examination
Test pile foundation to be connected with horizontal reacting force stake 8.Reference stake 10 is established, with bolt by horizontal displacement near test pile foundation
Dial gauge 6 is fixed between reference stake 10 and test pile foundation.Calculate pile foundation pile cover top to be tested and add vertical force
Jack 3 and the height of roller bearing unit 2, be fixed on desired height by reaction beam 1 by anchor pole, and ensure counter-force
Beam 1 is in level, then vertical force jack 3 and roller bearing unit 2 are installed on reaction beam 1 and test pile foundation
Between pile cover.Datum line beam 9 is arranged under a stake top, side at about 200mm, vertical displacement dial gauge 4 is passed through
Bolt is individually fixed in datum line beam 9 and test pile foundation pile body.By vertical, horizontal addload unit (3,5) respectively
Independently pressurized, the basis set conjunction of test pile can be carried out and add unloading, by gathering test data, analyze stake under combined load
Vertical and the horizontal displacement change of body, and then the bearer properties of combined load Single Pile can be analyzed.
The above-mentioned description to embodiment is to be understood that for ease of those skilled in the art and use to send out
Bright.These embodiments obviously easily can be made various amendment by person skilled in the art, and at this
The General Principle illustrated is applied in other embodiments without through performing creative labour.Therefore, the present invention does not limits
In above-described embodiment, those skilled in the art are according to the announcement of the present invention, without departing from changing that scope is made
Entering and revise all should be within protection scope of the present invention.
Claims (8)
1. an on-the-spot test pile base combined load charger, for scene test pile foundation is combined load,
It is characterized in that, described charger includes the vertical charging assembly that scene test pile foundation applies vertical load,
Scene test pile foundation is applied the horizontal addload assembly of horizontal loading, the deflection after the loading of experiment with measuring pile foundation vertical
Test pile vertical deformation measure assembly, and experiment with measuring pile foundation level load after the test pile horizontal distortion of deflection
Measure assembly.
A kind of on-the-spot test pile base combined load charger the most according to claim 1, it is characterised in that
Described vertical charging assembly includes reaction beam (1) and vertical loading unit (3), described reaction beam (1) water
The flat top being fixed on test pile foundation, described vertical loading unit (3) connects reaction beam (1) and test respectively
Pile foundation top, and test pile foundation vertical is loaded.
A kind of on-the-spot test pile base combined load charger the most according to claim 2, it is characterised in that
Roller bearing unit (2) it is additionally provided with, this roller bearing unit (2) between reaction beam (1) and vertical loading unit (3)
By the backing plate of two pieces of difference Contact reaction-force beam (1) with vertical loading unit (3), and it is arranged on described two pieces of pads
Rolling shaft structure composition between plate.
A kind of on-the-spot test pile base combined load charger the most according to claim 1, it is characterised in that
Described horizontal addload assembly includes horizontal reacting force stake (8) and horizontal addload unit (5), described horizontal reacting force
Stake (8) is vertically arranged in one side of test pile foundation, and described horizontal addload unit (5) connects horizontal reacting force respectively
Stake (8) and test pile foundation, and to test pile foundation horizontal addload.
A kind of on-the-spot test pile base combined load charger the most according to claim 4, it is characterised in that
Described horizontal addload unit (5) is connected by ball pivot (7) is fixing with test pile foundation.
A kind of on-the-spot test pile base combined load charger the most according to claim 1, it is characterised in that
Described test pile vertical deformation is measured assembly and is included being horizontally set on test pile foundation datum line beam (9) on one side, and two
End is respectively fixedly connected with datum line beam (9) and the vertical displacement dial gauge (4) of test pile foundation.
A kind of on-the-spot test pile base combined load charger the most according to claim 6, it is characterised in that
The aspect ratio test pile foundation top short 180-220mm of height overhead on described datum line beam (9) distance ground.
A kind of on-the-spot test pile base combined load charger the most according to claim 1, it is characterised in that
Described test pile horizontal distortion is measured assembly and is included being vertically arranged in test pile foundation reference stake (10) on one side, and
Two ends are respectively fixedly connected with reference stake (10) and the horizontal displacement dial gauge (6) of test pile foundation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610463028.8A CN106013270A (en) | 2016-06-23 | 2016-06-23 | Combined load loading device for pile foundation in field testing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610463028.8A CN106013270A (en) | 2016-06-23 | 2016-06-23 | Combined load loading device for pile foundation in field testing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106013270A true CN106013270A (en) | 2016-10-12 |
Family
ID=57086515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610463028.8A Pending CN106013270A (en) | 2016-06-23 | 2016-06-23 | Combined load loading device for pile foundation in field testing |
Country Status (1)
| Country | Link |
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| CN (1) | CN106013270A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107460862A (en) * | 2017-09-22 | 2017-12-12 | 中国路桥工程有限责任公司 | A kind of base bearing capacity and frictional resistance joint test device |
| CN108181172A (en) * | 2017-12-29 | 2018-06-19 | 浙江大学 | A kind of inclination basement rock pile foundation failure mode and load-carrying properties indoor simulation device and its method |
| CN108487335A (en) * | 2018-04-18 | 2018-09-04 | 同济大学 | A kind of single-pile vertical orientation cyclic loading test device and method of simulation high ferro load |
| CN108775995A (en) * | 2018-06-14 | 2018-11-09 | 河海大学 | A kind of multi-functional loading frame and stake shock test method |
| CN109507029A (en) * | 2018-11-29 | 2019-03-22 | 长江大学 | Apply the auxiliary device of large-tonnage traveling load |
| CN110629808A (en) * | 2019-09-02 | 2019-12-31 | 江苏省送变电有限公司 | Testing device and testing method for interfacial mechanical property of pile and foundation soil |
| CN111289351A (en) * | 2020-03-23 | 2020-06-16 | 中铁二院工程集团有限责任公司 | Composite light pile group pile bearing capacity detection device, system and method |
| CN112962684A (en) * | 2021-02-01 | 2021-06-15 | 浙江大学 | Pseudo-static test device for detecting anti-seismic effect of concrete pile |
| CN113737871A (en) * | 2021-09-17 | 2021-12-03 | 中建八局第二建设有限公司 | Device and method for preventing rotation generated in pile horizontal thrust test |
| 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 |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107460862B (en) * | 2017-09-22 | 2023-10-13 | 中国路桥工程有限责任公司 | Combined testing device for substrate bearing capacity and frictional resistance |
| CN107460862A (en) * | 2017-09-22 | 2017-12-12 | 中国路桥工程有限责任公司 | A kind of base bearing capacity and frictional resistance joint test device |
| CN108181172A (en) * | 2017-12-29 | 2018-06-19 | 浙江大学 | A kind of inclination basement rock pile foundation failure mode and load-carrying properties indoor simulation device and its method |
| CN108487335A (en) * | 2018-04-18 | 2018-09-04 | 同济大学 | A kind of single-pile vertical orientation cyclic loading test device and method of simulation high ferro load |
| CN108775995A (en) * | 2018-06-14 | 2018-11-09 | 河海大学 | A kind of multi-functional loading frame and stake shock test method |
| CN109507029A (en) * | 2018-11-29 | 2019-03-22 | 长江大学 | Apply the auxiliary device of large-tonnage traveling load |
| CN110629808A (en) * | 2019-09-02 | 2019-12-31 | 江苏省送变电有限公司 | Testing device and testing method for interfacial mechanical property of pile and foundation soil |
| CN110629808B (en) * | 2019-09-02 | 2023-12-22 | 江苏省送变电有限公司 | Test device and test method for interfacial mechanical properties of piles and foundation soil |
| CN111289351A (en) * | 2020-03-23 | 2020-06-16 | 中铁二院工程集团有限责任公司 | Composite light pile group pile bearing capacity detection device, system and method |
| CN112962684A (en) * | 2021-02-01 | 2021-06-15 | 浙江大学 | Pseudo-static test device for detecting anti-seismic effect of concrete pile |
| CN113737871A (en) * | 2021-09-17 | 2021-12-03 | 中建八局第二建设有限公司 | Device and method for preventing rotation generated in pile horizontal thrust test |
| 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 |
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