CN106088173B - A kind of prefabricated pile Horizontal Displacement and pile body stress joint test device - Google Patents
A kind of prefabricated pile Horizontal Displacement and pile body stress joint test device Download PDFInfo
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- CN106088173B CN106088173B CN201610658822.8A CN201610658822A CN106088173B CN 106088173 B CN106088173 B CN 106088173B CN 201610658822 A CN201610658822 A CN 201610658822A CN 106088173 B CN106088173 B CN 106088173B
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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 belongs to civil engineering in-situ test equipment technical fields, it is related to a kind of prefabricated pile Horizontal Displacement and pile body stress joint test device, self-compensation fiber grating strain transducer string installation by adhering is electrically connected in the groove of test pile and with fiber grating sensor demodulator；Engineering pile is connected by steel plate cushion block with jack, and cushion block is placed under jack, and load transducer is in contact with the pressure end of jack, and load transducer is connected with load transducer display instrument；The side of spherical hinged-support is contacted with load transducer, the other side is contacted with test pile, it is fixedly installed with the first dial gauge and the second dial gauge respectively on first drilling angle steel and the second drilling angle steel, test pile has the first datum line beam far from one end branch of jack, and the first datum line beam is fixed with the second datum line beam far from the side of jack；Its structure is simple, easy to operate, at low cost, and measuring accuracy is high, and strong operability show that numerical result is direct, and precision is high, and error is small.
Description
Technical field:
The invention belongs to civil engineering in-situ test equipment technical field, it is related to a kind of prefabricated pile Horizontal Displacement and stake
Body stress joint test device makes up and improves the deficiency of current test device, can more acurrate, more comprehensively, more easily obtain
The horizontal displacement of prefabricated pile out, and the stress distribution of pile body is obtained simultaneously by embedded FBG sensor, it is ground for the test of prefabricated pile
Study carefully and pile measurement provides foundation.
Background technique:
Prefabricated pile is very extensive in civil engineering industrial application, with going deep into for city development, the continuous leather of Building technology
Newly, bridge and port engineering construction are more and more, and loading demands are also higher and higher, and in such engineering, pile foundation is in addition to that will hold
Outside by biggish vertical load, often due to the brake force of wave force, wind-force, shaking force, ship impact force and vehicular load
Etc. reasons make foundation pile bear biggish horizontal loading, so under the horizontal loads of such engineering pile, the carrying of pile foundation
It characteristic and stress distribution research and detects particularly important.In existing engineering pile horizontal loading test and detection, only to stake
Horizontal bearing capacity study and detected, and different due to building yard, loading device is also not quite similar, sometimes by
Even fail in the loading device installation test result inaccuracy undesirable, lack of standardization that will cause, so the reasonable peace of loading device
Dress and collocation are extremely important to the research and detection of the horizontal loading characteristic of stake.FBG sensing technology is along with fiber optic communication skill
The development of art and fibre optics and the novel photoelectronics technology of one kind generated, have test data stability is good, precision is high,
Small in size, light weight, convenient for being laid with installation, strong antijamming capability, waterproof, moisture-proof, high temperature resistant, anticorrosive, more series connection the features such as
And it is widely used in the engineering fields such as the subsidence monitoring of bridge, tunnel and jacket offshore platform, in current FBG sensor
In the test of embedded pile body characteristic, since its is easy to fall off, test result is affected by temperature big characteristic, can make measurement data not
Accurately, so as to cause unsuccessful test.Therefore seek a kind of completely new stake horizontal loading test device for testing pile body stress
Research and detection to engineering is significant.
Summary of the invention:
It is an object of the invention to overcome disadvantage of the existing technology, seeks design and a kind of prefabricated stake top level is provided
Pile stress test is added to prefabricated pile horizontal static-load experiment in displacement and pile body stress joint test device, for directly measuring
The horizontal displacement of prefabricated pile and pile body stress, convenient for studying the horizontal loading bearing capacity and mechanical characteristic of prefabricated pile.
To achieve the goals above, main structure of the invention includes engineering pile, steel plate cushion block, jack, load sensing
Device, spherical hinged-support, test pile, the first dial gauge, the first Magnetic gauge stand, the first datum line beam, the second dial gauge, the second magnetic table
Seat, the second datum line beam, self-compensation fiber grating strain transducer string, load transducer display instrument, fiber-optic grating sensor demodulation
Instrument, the first drilling angle steel, cushion block and the second drilling angle steel；It is the recessed of 5mm × 5mm that cross section is vertically carved in the two sides of test pile
The self-compensation fiber grating strain transducer string installation by adhering of slot, upper tightly lower sparse structure in the groove of test pile and uses structure
Glue sealing, self-compensation fiber grating strain transducer string are electrically connected with fiber grating sensor demodulator；Engineering pile is test pile
Counter-force is provided, the close stake that bearing capacity is more than or equal to test pile is chosen；Engineering pile is connected by steel plate cushion block with jack, steel plate
The number of cushion block is determined according to the distance between test pile and engineering pile, to guarantee that engineering pile can sufficiently provide counter-force；Jack
Under be placed with cushion block, load transducer is in contact with the pressure end of jack, for accurately measure jack application pressure value,
Load transducer is connected with load transducer display instrument；The side of spherical hinged-support is contacted with load transducer, the other side and survey
Test pile contact guarantees the power stepless action of jack application on test pile；At test pile and horizontal force action center parallel
Two sides are fixedly installed with the first drilling angle steel using setscrew, at test pile and horizontal force action center parallel up at 50cm
Two sides upright position is fixedly installed with the second drilling angle steel with same way, distinguishes on the first drilling angle steel and the second drilling angle steel
It is fixedly installed with the first dial gauge and the second dial gauge, the dial plate of the first dial gauge and the second dial gauge is parallel to the ground；It surveys
Test pile has the first datum line beam far from branch at one end distance test stake 30cm of jack, puts on the first dial gauge and the first datum line beam
The the first Magnetic gauge stand connection set；First datum line beam is fixed with the second datum line beam far from the side of jack, the second datum line beam with
First datum line beam is at a distance of 10cm, and the second benchmark depth of beam is higher than the first datum line beam, on the second datum line beam with the first datum line beam
Correspondence is placed with the second Magnetic gauge stand being connected with the second dial gauge at same position.
Engineering pile of the present invention includes pre stressed empty piped piles, pre-stress hollow square pile and solid square pile.
The present invention realizes the test process of prefabricated pile horizontal displacement and pile body stress are as follows:
(1) before piling, the two sides of test pile face are carved to the groove of 5mm × 5mm, by self compensation light prefabricated in advance
Fiber grating strain transducer string is put into two grooves, and is sealed with structure glue, is conserved two days, and self-compensation fiber grating strain passes
Sensor string forms upper tightly lower sparse structure；
(2) it when test pile energy normal use, chooses suitable engineering pile and counter-force is provided, guarantee that its bearing capacity is more than or equal to and survey
Test pile；
(3) spherical hinged-support, load transducer, jack, steel plate cushion block are successively put between test pile and engineering pile,
The number of steel plate cushion block is determined according to the distance between test pile and engineering pile, guarantees that engineering pile can sufficiently provide counter-force, jack
Lower placement cushion block, guarantee jack effect centroid be overlapped with test device each section center, each test device part centre with bury
The self-compensation fiber grating strain transducer string set is vertical；
(4) drilling machine two sides face drill two holes at test pile and horizontal force action center parallel are used, it is solid with setscrew
Fixed first drilling angle steel, same method fix the second drilling angle steel at 50cm right above the first drilling angle steel both sides；
(5) it is put away from the first datum line beam of branch at test pile 30cm and on the first datum line beam in test pile far from jack one end
First dial gauge is fixed on the first drilling angle steel by the first Magnetic gauge stand, and the first dial gauge dial plate is parallel to the ground；Second
Datum line beam fixes the second datum line beam, the second datum line beam and the first datum line beam at a distance of 10cm far from jack side, guarantees the second base
Quasi- deck-molding is fixed on the second drilling angle steel in putting the second Magnetic gauge stand on the first datum line beam, the second datum line beam, by the second dial gauge
On, the second dial gauge dial plate is parallel to the ground；
(6) self-compensation fiber grating strain transducer string is connected with fiber grating sensor demodulator, load transducer
It is connected with load transducer display instrument；
(7) after checking that each component installation of test device is correct, load test is carried out to test pile, records corresponding position
Shifting and stress variation value are completed to the horizontal displacement of prefabricated pile and the test of pile body stress.
For the present invention compared with existing test device, structure is simple, easy to operate, at low cost, and measuring accuracy is high, can operate
Property it is strong, show that numerical result is direct, precision is high, and error is small.
Detailed description of the invention:
Fig. 1 is main structure schematic diagram of the invention.
Fig. 2 is self-compensation fiber grating strain transducer string scheme of installation of the invention.
Fig. 3 is that jack and steel plate cushion block of the invention contact schematic diagram.
Fig. 4 is that datum line beam of the invention puts schematic diagram.
Specific embodiment:
The present invention will be further described by way of example and in conjunction with the accompanying drawings.
Embodiment:
The primary structure of the present embodiment includes engineering pile 1, steel plate cushion block 2, jack 3, load transducer 4, spherical hinged
Seat 5, test pile 6, the first dial gauge 7, the first Magnetic gauge stand 8, the first datum line beam 9, the second dial gauge 10, the second Magnetic gauge stand
11, the second datum line beam 12, self-compensation fiber grating strain transducer string 13, load transducer display instrument 14, optical fiber grating sensing
The drilling of device (FBG) demodulator 15, first angle steel 16, cushion block 17 and the second drilling angle steel 18；Vertically it is carved with cross section in the two sides of test pile 6
For the groove of 5mm × 5mm, 13 installation by adhering of self-compensation fiber grating strain transducer string of upper tightly lower sparse structure is in test pile
It is sealed in 6 groove and with structure glue, self-compensation fiber grating strain transducer string 13 and fiber grating sensor demodulator 15
Electrical connection；Engineering pile 1 is that test pile 6 provides counter-force, chooses the close stake that bearing capacity is more than or equal to test pile 6；Engineering pile 1 passes through
Steel plate cushion block 2 connects with jack 3, and the number of steel plate cushion block 2 is determined according to the distance between test pile 6 and engineering pile 1, to protect
Card engineering pile 1 can sufficiently provide counter-force；Cushion block 17, the pressure end phase of load transducer 4 and jack 3 are placed under jack 3
Contact, for accurately measuring the pressure value of the application of jack 3, load transducer 4 is connected with load transducer display instrument 14；It is spherical
The side of hinged-support 5 is contacted with load transducer 4, and the other side is contacted with test pile 6, and the power for guaranteeing that jack 3 applies uniformly is made
With on test pile 6；Two sides at test pile 6 and horizontal force action center parallel are fixedly installed with the first brill using setscrew
Hole angle steel 16, up peace with same way is fixed in two sides upright position at 50cm at test pile 6 and horizontal force action center parallel
Equipped with the second drilling angle steel 18, it is fixedly installed with the first dial gauge 7 respectively on the first drilling angle steel 16 and the second drilling angle steel 18
With the second dial gauge 10, the dial plate of the first dial gauge 7 and the second dial gauge 10 is parallel to the ground；Test pile 6 is far from jack 3
6 30cm of one end distance test stake at branch have the first datum line beam 9, first placed on the first dial gauge 7 and the first datum line beam 9
Magnetic gauge stand 8 connects；First datum line beam 9 is fixed with the second datum line beam 12, the second datum line beam 12 and far from the side of jack 3
One datum line beam 9 is at a distance of 10cm, and the height of the second datum line beam 12 is higher than the first datum line beam 9, on the second datum line beam 12 with the first base
Correspondence is placed with the second Magnetic gauge stand 11 being connected with the second dial gauge 10 at quasi- 9 same position of beam.
Engineering pile 1 described in the present embodiment includes pre stressed empty piped piles, pre-stress hollow square pile and solid square pile.
The present embodiment realizes the test process of prefabricated pile horizontal displacement and pile body stress are as follows:
(1) before piling, the two sides of 6 face of test pile are carved to the groove of 5mm × 5mm, by self compensation prefabricated in advance
Fiber Bragg grating strain sensor string 13 is put into two grooves, and is sealed with structure glue, is conserved two days, self-compensation fiber grating is answered
Become sensor string 13 and forms upper tightly lower sparse structure；
(2) it when test pile energy normal use, chooses suitable engineering pile 1 and counter-force is provided, guarantee that its bearing capacity is more than or equal to
Test pile 6；
(3) spherical hinged-support 5, load transducer 4, jack 3, steel plate are successively put between test pile 6 and engineering pile 1
The number of cushion block 2, steel plate cushion block 2 is determined according to the distance between test pile 6 and engineering pile 1, guarantees that engineering pile 1 can be provided sufficiently instead
Power is placed with cushion block 17 under jack 3, guarantees that jack 3 acts on centroid and is overlapped with test device each section center, respectively tests and fill
It is vertical with embedding good self-compensation fiber grating strain transducer string 13 to set part centre；
(4) drilling machine two sides face drill two holes at test pile 6 and horizontal force action center parallel are used, it is solid with setscrew
Fixed first drilling angle steel 16, same method fix the second drilling angle steel at 50cm right above the first drilling 16 both sides of angle steel
18；
(5) in test pile 6 far from 3 one end of jack away from branch the first datum line beam 9 and in the first datum line beam at test pile 630cm
The first Magnetic gauge stand 8 is put on 9, and the first dial gauge 7 is fixed on the first drilling angle steel 16,7 dial plate of the first dial gauge and ground
In parallel；The second datum line beam 12, the second datum line beam 12 and 9 phase of the first datum line beam are fixed far from 3 side of jack in the second datum line beam 9
Away from 10cm, guarantees that the second datum line beam 12 is higher than the first datum line beam 9, the second Magnetic gauge stand 11 is put on the second datum line beam 12, by second
Dial gauge 10 is fixed on the second drilling angle steel 18, and 10 dial plate of the second dial gauge is parallel to the ground；
(6) self-compensation fiber grating strain transducer string 13 is connected with fiber grating sensor demodulator 15, load passes
Sensor 4 is connected with load transducer display instrument 14；
(7) after checking that each component installation of test device is correct, load survey is carried out to test pile 6 according to corresponding specification
Examination records corresponding displacement and stress variation value, completes to the horizontal displacement of prefabricated pile and the test of pile body stress.
Claims (1)
1. a kind of prefabricated pile Horizontal Displacement and pile body stress joint test device, it is characterised in that main structure includes engineering
Stake, steel plate cushion block, jack, load transducer, spherical hinged-support, test pile, the first dial gauge, the first Magnetic gauge stand, first
Datum line beam, the second dial gauge, the second Magnetic gauge stand, the second datum line beam, self-compensation fiber grating strain transducer string, load sensing
Device display instrument, fiber grating sensor demodulator, the first drilling angle steel, cushion block and the second drilling angle steel；The two sides of test pile are perpendicular
To be carved with cross section be 5mm × 5mm groove, the embedded peace of self-compensation fiber grating strain transducer string of upper tightly lower sparse structure
It is sealed in the groove of test pile and with structure glue, self-compensation fiber grating strain transducer string and fiber-optic grating sensor solution
Adjust instrument electrical connection；Engineering pile provides counter-force for test pile, chooses the close stake that bearing capacity is more than or equal to test pile；Engineering pile passes through
Steel plate cushion block connects with jack, and the number of steel plate cushion block is determined according to the distance between test pile and engineering pile, to guarantee work
Journey stake can sufficiently provide counter-force；Cushion block is placed under jack, load transducer is in contact with the pressure end of jack, for standard
Really the pressure value that measurement jack applies, load transducer are connected with load transducer display instrument；The side of spherical hinged-support with
Load transducer contact, the other side are contacted with test pile, guarantee the power stepless action of jack application on test pile；Test pile
The first drilling angle steel, test pile and horizontal force are fixedly installed with using setscrew with the two sides at horizontal force action center parallel
Action center locates at up 50cm two sides upright position in parallel and is fixedly installed with the second drilling angle steel, the first drilling with same way
It is fixedly installed with the first dial gauge and the second dial gauge, the first dial gauge and the second percentage respectively on angle steel and the second drilling angle steel
The dial plate of table is parallel to the ground；Test pile has the first datum line beam far from branch at one end distance test stake 30cm of jack, the
The first Magnetic gauge stand placed on one dial gauge and the first datum line beam is connect；First datum line beam is fixed with far from the side of jack
Second datum line beam, the second datum line beam and the first datum line beam are at a distance of 10cm, and the second benchmark depth of beam is higher than the first datum line beam, the
It is corresponding at the first datum line beam same position on two datum line beams to be placed with the second Magnetic gauge stand being connected with the second dial gauge；It is described
Engineering pile includes pre stressed empty piped piles, pre-stress hollow square pile and solid square pile；
Realize the test process of prefabricated pile horizontal displacement and pile body stress are as follows:
(1) before piling, the two sides of test pile face are carved to the groove of 5mm × 5mm, by self compensation optical fiber light prefabricated in advance
Grid strain transducer string is put into two grooves, and is sealed with structure glue, is conserved two days, self-compensation fiber grating strain transducer
String forms upper tightly lower sparse structure；
(2) it when test pile energy normal use, chooses suitable engineering pile and counter-force is provided, guarantee that its bearing capacity is more than or equal to test
Stake；
(3) spherical hinged-support, load transducer, jack, steel plate cushion block, steel plate are successively put between test pile and engineering pile
The number of cushion block is determined according to the distance between test pile and engineering pile, guarantees that engineering pile can sufficiently provide counter-force, jack decentralization
Set cushion block, guarantee that jack effect centroid is overlapped with test device each section center, each test device part centre with it is embedding good
Self-compensation fiber grating strain transducer string it is vertical；
(4) with drilling machine at test pile and horizontal force action center parallel two sides face drill two holes, fix the with setscrew
One drilling angle steel, same method fix the second drilling angle steel at 50cm right above the first drilling angle steel both sides；
(5) away from the first datum line beam of branch at test pile 30cm and first is put on the first datum line beam far from jack one end in test pile
First dial gauge is fixed on the first drilling angle steel by Magnetic gauge stand, and the first dial gauge dial plate is parallel to the ground；In the second benchmark
Beam fixes the second datum line beam, the second datum line beam and the first datum line beam at a distance of 10cm far from jack side, guarantees the second datum line beam
Higher than the first datum line beam, the second Magnetic gauge stand is put on the second datum line beam, and the second dial gauge is fixed on the second drilling angle steel, the
Two dial gauge dial plates are parallel to the ground；
(6) self-compensation fiber grating strain transducer string is connected with fiber grating sensor demodulator, load transducer and load
Lotus sensor display instrument is connected；
(7) after checking that test device each component installation is correct, load test is carried out to test pile, record corresponding displacement and
Stress variation value is completed to the horizontal displacement of prefabricated pile and the test of pile body stress.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610658822.8A CN106088173B (en) | 2016-08-11 | 2016-08-11 | A kind of prefabricated pile Horizontal Displacement and pile body stress joint test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610658822.8A CN106088173B (en) | 2016-08-11 | 2016-08-11 | A kind of prefabricated pile Horizontal Displacement and pile body stress joint test device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106088173A CN106088173A (en) | 2016-11-09 |
| CN106088173B true CN106088173B (en) | 2019-04-02 |
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| CN201610658822.8A Active CN106088173B (en) | 2016-08-11 | 2016-08-11 | A kind of prefabricated pile Horizontal Displacement and pile body stress joint test device |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107059952A (en) * | 2017-02-28 | 2017-08-18 | 中交武汉港湾工程设计研究院有限公司 | A kind of steel-pipe pile horizontal cyclic experimental provision of simulated waves load |
| CN109469125B (en) * | 2019-01-11 | 2024-01-30 | 深圳宏业基岩土科技股份有限公司 | Pile foundation load test device for fiber bragg grating sensing detection and detection method thereof |
| CN113389228B (en) * | 2021-05-28 | 2022-04-08 | 青岛理工大学 | Pile side transverse static load loading device |
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| KR101188004B1 (en) * | 2009-12-22 | 2012-10-04 | 성균관대학교산학협력단 | Loading Device For Pile Load Test |
| CN203034498U (en) * | 2013-01-07 | 2013-07-03 | 中国建筑第六工程局有限公司 | Horizontal bearing capability test device of piles in permafrost region |
| CN103195112A (en) * | 2013-04-18 | 2013-07-10 | 四川建筑职业技术学院 | Foundation pile foundation model analyzing method and test device for same |
| CN204326120U (en) * | 2014-12-05 | 2015-05-13 | 武汉科技大学 | A kind of device measuring horizontal bearing capacity of single pile |
| CN205934996U (en) * | 2016-08-11 | 2017-02-08 | 青岛理工大学 | Testing arrangement is united to precast pile pile bolck horizontal displacement and pile body stress |
-
2016
- 2016-08-11 CN CN201610658822.8A patent/CN106088173B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101188004B1 (en) * | 2009-12-22 | 2012-10-04 | 성균관대학교산학협력단 | Loading Device For Pile Load Test |
| CN203034498U (en) * | 2013-01-07 | 2013-07-03 | 中国建筑第六工程局有限公司 | Horizontal bearing capability test device of piles in permafrost region |
| CN103195112A (en) * | 2013-04-18 | 2013-07-10 | 四川建筑职业技术学院 | Foundation pile foundation model analyzing method and test device for same |
| CN204326120U (en) * | 2014-12-05 | 2015-05-13 | 武汉科技大学 | A kind of device measuring horizontal bearing capacity of single pile |
| CN205934996U (en) * | 2016-08-11 | 2017-02-08 | 青岛理工大学 | Testing arrangement is united to precast pile pile bolck horizontal displacement and pile body stress |
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