CN205934996U - Combined testing device for horizontal displacement of pile top and stress of pile body of precast pile - Google Patents

Combined testing device for horizontal displacement of pile top and stress of pile body of precast pile Download PDF

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Publication number
CN205934996U
CN205934996U CN201620870719.5U CN201620870719U CN205934996U CN 205934996 U CN205934996 U CN 205934996U CN 201620870719 U CN201620870719 U CN 201620870719U CN 205934996 U CN205934996 U CN 205934996U
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China
Prior art keywords
pile
test
jack
datum line
line beam
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Expired - Fee Related
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CN201620870719.5U
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Chinese (zh)
Inventor
张明义
白晓宇
朱磊
王永洪
高强
王鹏
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Qingdao University of Technology
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Qingdao University of Technology
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Priority to CN201620870719.5U priority Critical patent/CN205934996U/en
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Publication of CN205934996U publication Critical patent/CN205934996U/en
Expired - Fee Related legal-status Critical Current
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  • Piles And Underground Anchors (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)
  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)

Abstract

The utility model belongs to the technical field of civil engineering in-situ test equipment, and relates to a precast pile top horizontal displacement and pile body stress combined test device, wherein a self-compensating fiber grating strain sensor string is embedded in a groove of a test pile and is electrically connected with a fiber grating sensor demodulator; the engineering pile is connected with the jack through a steel plate cushion block, the cushion block is arranged below the jack, the load sensor is in contact with the pressure applying end of the jack, and the load sensor is connected with a load sensor display instrument; one side of the spherical hinged support is in contact with the load sensor, the other side of the spherical hinged support is in contact with the test pile, a first dial indicator and a second dial indicator are fixedly mounted on the first drill hole angle steel and the second drill hole angle steel respectively, a first reference beam is supported at one end, far away from the jack, of the test pile, and a second reference beam is fixed at one side, far away from the jack, of the first reference beam; the device has the advantages of simple structure, convenient operation, low cost, high test precision, strong operability, direct numerical value result, high precision and small error.

Description

A kind of prefabricated pile Horizontal Displacement and pile body stress joint test device
Technical field:
The utility model belongs to civil engineering in-situ test equipment technical field, is related to a kind of prefabricated pile Horizontal Displacement And pile body stress joint test device, make up and improve the deficiency of current test device, can more accurately, more comprehensively, more convenient The horizontal displacement drawing prefabricated pile, and obtain the stress distribution of pile body by embedded FBG simultaneously, be the examination of prefabricated pile Test research and pile measurement provides foundation.
Background technology:
Prefabricated pile is quite varied in civil engineering sector application, going deep into city development, the continuous leather of Building technology Newly, bridge and port engineering construction get more and more, loading demands also more and more higher, and in such engineering, pile foundation is except holding Outside by larger vertical load, often due to the brake force of wave force, wind-force, shaking force, ship impact force and vehicular load Foundation pile is made to bear larger horizontal loading etc. reason, so under the horizontal loads to such engineering pile, the carrying of pile foundation Characteristic and stress distribution research and detection are particularly important.In existing engineering pile horizontal loading test and detection, simply to stake Horizontal bearing capacity carried out studying and detected, and differing due to building yard, charger is also not quite similar, sometimes by In charger install undesirable, lack of standardization result of the test can be caused inaccurate or even failure, so the reasonable peace of charger The research of the dress and collocation horizontal loading characteristic to stake and detection are extremely important.FBG sensing technology is accompanied by fiber optic communication skill Art and fiberoptic development and a kind of new photoelectronics technology that produces, have test data good stability, high precision, Small volume, light weight, it is easy to lay installation, strong antijamming capability, waterproof, protection against the tide, high temperature resistant, anticorrosive, the features such as connect more And it is widely used in the engineering fields such as the subsidence monitoring of bridge, tunnel and jacket offshore platform, in current FBG In the test of embedded peg body characteristic, because it is easy to fall off, the big characteristic of test result temperature influence, measurement data can be made not Accurately, thus leading to unsuccessful test.Therefore seek a kind of stake horizontal loading test device of the brand-new pile body stress tested Research to engineering and detection are significant.
Content of the invention:
Goal of the invention of the present utility model is the shortcoming overcoming prior art to exist, and seeking design provides a kind of prefabricated pile Horizontal Displacement and pile body stress joint test device, add pile stress test to prefabricated pile horizontal static-load experiment, are used for Directly measure horizontal displacement and the pile body stress of prefabricated pile, be easy to study horizontal loading bearing capacity and the mechanical characteristic of prefabricated pile.
To achieve these goals, agent structure of the present utility model includes engineering pile, steel plate cushion block, jack, load Sensor, 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 Property gauge stand, the second datum line beam, self-compensation fiber grating strain transducer string, load transducer display instrument, fiber-optic grating sensor (FBG) demodulator, the first boring angle steel, cushion block and the second boring angle steel;It is 5mm × 5mm's that cross section is vertically carved with the both sides of test pile Groove, the self-compensation fiber grating strain transducer string installation by adhering of upper tightly lower sparse structure is in the groove of test pile and with tying Structure glue seals, and self-compensation fiber grating strain transducer string is electrically connected with fiber grating sensor demodulator;Engineering pile is test Stake provides counter-force, chooses the close stake that bearing capacity is more than or equal to test pile;Engineering pile is connected with jack by steel plate cushion block, steel The number of board spacer determines according to the distance between test pile and engineering pile, to ensure that engineering pile can fully provide counter-force;Very heavy It is placed with cushion block, load transducer is contacted with the pressure end of jack, the pressure applying for accurate measurement jack under top Value, load transducer is connected with load transducer display instrument;The side of spherical hinged-support is contacted with load transducer, opposite side with Test pile contact is it is ensured that the power stepless action of jack applying is on test pile;At test pile and horizontal force action center parallel Both sides the first boring angle steel is installed with using setscrew, up 50cm at test pile and horizontal force action center parallel Place's both sides upright position same way is installed with the second boring angle steel, and the first boring angle steel and the second boring angle steel divide It is not 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 all parallel to the ground; Test pile has the first datum line beam away from one end distance test stake 30cm of jack, on the first dial gauge and the first datum line beam The first Magnetic gauge stand placed connects;First datum line beam is fixed with the second datum line beam, the second datum line beam away from the side of jack With the first datum line beam at a distance of 10cm, and the second benchmark depth of beam is higher than the first datum line beam, with the first benchmark on the second datum line beam Liang Xiangtongweizhichu correspondence is placed with the second Magnetic gauge stand being connected with the second dial gauge.
Engineering pile described in the utility model includes pre stressed empty piped piles, pre-stress hollow square pile and solid square pile.
The utility model realizes prefabricated pile horizontal displacement and the test process of pile body stress is:
(1) before piling, by test pile just to both sides carve 5mm × 5mm groove, by self compensation light prefabricated in advance Fiber grating strain transducer string is put in two grooves, and is sealed with structure glue, maintenance two days, and self-compensation fiber grating strain passes Sensor string forms upper tightly lower sparse structure;
(2), when test pile can normally use, choosing suitable engineering pile provides counter-force it is ensured that its bearing capacity is more than or equal to survey Test pile;
(3) spherical hinged-support, load transducer, jack, steel plate cushion block are put successively between test pile and engineering pile, The number of steel plate cushion block is according to the determination of the distance between test pile and engineering pile it is ensured that engineering pile can fully provide counter-force, jack Lower placement cushion block it is ensured that jack the effect centre of form and test device each several part center superposition, each test device part centre with bury The self-compensation fiber grating strain transducer string put is vertical;
(4) use rig both sides at test pile with horizontal force action center parallel just to drill two holes, solid with setscrew Surely hole angle steel, same method, fix the second boring angle steel at 50cm directly over the first boring angle steel both sides;
(5) test pile away from jack one end away from test pile 30cm at the first datum line beam putting on the first datum line beam First Magnetic gauge stand, the first dial gauge is fixed on the first boring angle steel, the first dial gauge dial plate is parallel to the ground;Second Datum line beam fixes the second datum line beam away from jack side, and the second datum line beam and the first datum line beam are at a distance of 10cm it is ensured that the second base Quasi- deck-molding puts the second Magnetic gauge stand on the first datum line beam, the second datum line beam, and the second dial gauge is fixed on the second boring angle steel 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 part of test device is installed correctly, load test is carried out to test pile, records corresponding position Move and STRESS VARIATION value, complete the horizontal displacement to prefabricated pile and the test of pile body stress.
, compared with existing test device, its structure is simple, easy to operate, low cost for the utility model, and measuring accuracy is high, can Strong operability, draws numerical result directly, high precision, and error is little.
Brief description:
Fig. 1 is agent structure schematic diagram of the present utility model.
Fig. 2 is self-compensation fiber grating strain transducer string scheme of installation of the present utility model.
Fig. 3 contacts schematic diagram for jack of the present utility model with steel plate cushion block.
Fig. 4 puts schematic diagram for datum line beam of the present utility model.
Specific embodiment:
Below by embodiment and combine accompanying drawing the utility model is described further.
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 11st, the second datum line beam 12, self-compensation fiber grating strain transducer string 13, load transducer display instrument 14, optical fiber grating sensing Device (FBG) demodulator 15, first boring angle steel 16, cushion block 17 and the second boring angle steel 18;Cross section is vertically carved with the both sides of test pile 6 Groove for 5mm × 5mm, self-compensation fiber grating strain transducer string 13 installation by adhering of upper tightly lower sparse structure is in test pile In 1 groove and with structure glue sealing, self-compensation fiber grating strain transducer string 13 and fiber grating sensor demodulator 15 Electrical connection;Engineering pile 1 provides counter-force for test pile 6, 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 is connected with jack 3, and the number of steel plate cushion block 2 determines according to the distance between test pile 6 and engineering pile 1, to protect Card engineering pile 1 can fully provide counter-force;It is placed with cushion block 17, the pressure end phase of load transducer 4 and jack 3 under jack 3 Contact, the pressure value applying for accurate measurement jack 3, load transducer 4 is connected with load transducer display instrument 14;Spherical The side 5 of hinged-support is contacted with load transducer 4, and opposite side is contacted with test pile 6 it is ensured that the power that jack 3 applies uniformly is made On test pile 6;Test pile 6 is installed with the first brill with the both sides at horizontal force action center parallel using setscrew Angle of spot hole steel 16, at test pile 6 and horizontal force action center parallel, up both sides upright position same way fixes peace at 50cm Equipped with the second boring angle steel 18, the first boring angle steel 16 and the second boring angle steel 18 are installed with the first dial gauge 7 respectively With the second dial gauge 10, the dial plate of the first dial gauge 7 and the second dial gauge 10 is all parallel to the ground;Test pile 6 is away from jack 3 One end distance test stake 630cm at have the first magnetic of placement on the first datum line beam 9, the first dial gauge 7 and the first datum line beam 9 Property 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 first away from the side of jack 3 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, with the first benchmark on the second datum line beam 12 At beam 9 same position, correspondence is placed with the second Magnetic gauge stand 11 being connected with the second dial gauge 10.
Described in the present embodiment, engineering pile 1 includes pre stressed empty piped piles, pre-stress hollow square pile and solid square pile.
The present embodiment realizes prefabricated pile horizontal displacement and the test process of pile body stress is:
(1) before piling, by test pile 6 just to both sides carve 5mm × 5mm groove, by self compensation prefabricated in advance Fiber Bragg grating strain sensor string 13 is put in two grooves, and is sealed with structure glue, maintenance two days, and self-compensation fiber grating should Become sensor string 13 and form upper tightly lower sparse structure;
(2), when test pile can normally use, choosing suitable engineering pile 1 provides counter-force it is ensured 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 put between test pile 6 and engineering pile 1 successively Cushion block 2, the number of steel plate cushion block 2 according to test pile 6 with the distance between engineering pile 1 determination it is ensured that engineering pile 1 can fully provide instead Power, is placed with cushion block 17 it is ensured that the jack 3 effect centre of form and test device each several part center superposition, respectively tests dress under jack 3 Put part centre vertical with embedding good self-compensation fiber grating strain transducer string 13;
(4) use rig both sides at test pile 6 with horizontal force action center parallel just to drill two holes, solid with setscrew Surely hole angle steel 16, same method, fix the second boring angle steel 18 at 50cm directly over the first boring angle steel 16 both sides;
(5) prop up the first datum line beam 9 at test pile 630cm and in the first datum line beam in test pile 6 away from jack 3 one end Put the first Magnetic gauge stand 8 on 9, the first dial gauge 7 is fixed on the first boring angle steel 16, the first dial gauge 7 dial plate and ground Parallel;Fix the second datum line beam 12, the second datum line beam 12 and the first datum line beam 9 phase in the second datum line beam 9 away from jack 3 side Away from 10cm it is ensured that the second datum line beam 12 is higher than the first datum line beam 9, the second datum line beam 12 is put the second Magnetic gauge stand 11, by second Dial gauge 10 is fixed on the second boring angle steel 18, and the second dial gauge 10 dial plate 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 part of test device is installed correctly, according to corresponding specification, load survey is carried out to test pile 6 Examination, records corresponding displacement and STRESS VARIATION value, completes the horizontal displacement to prefabricated pile and the test of pile body stress.

Claims (2)

1. a kind of prefabricated pile Horizontal Displacement and pile body stress joint test device are it is characterised in that agent 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 boring angle steel, cushion block and the second boring angle steel;The both sides of test pile are erected 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 contained in the groove of test pile and with structure glue sealing, self-compensation fiber grating strain transducer string and fiber-optic grating sensor solution Adjust instrument electrical connection;Engineering pile is connected with jack by steel plate cushion block, the number of steel plate cushion block according to test pile and engineering pile it Between distance determine, be placed with cushion block under jack, load transducer contacts with the pressure end of jack, for accurately measurement The pressure value that jack applies, load transducer is connected with load transducer display instrument;The side of spherical hinged-support is passed with load Sensor contacts, and opposite side is contacted with test pile, and test pile adopts setscrew solid with the both sides at horizontal force action center parallel Dingan County equipped with the first boring angle steel, test pile with horizontal force action center parallel up at 50cm both sides upright position with identical Mode is installed with the second boring angle steel, and the first boring angle steel and the second boring angle steel are installed with the first percentage respectively Table and the second dial gauge, the dial plate of the first dial gauge and the second dial gauge is all parallel to the ground;Test pile is away from the one of jack At the distance test stake 30cm of end, first Magnetic gauge stand having placement on the first datum line beam, the first dial gauge and the first datum line beam connects Connect;First datum line beam is fixed with the second datum line beam, the second datum line beam and the first datum line beam 10cm apart away from the side of jack, And second benchmark depth of beam be higher than the first datum line beam, corresponding with the first datum line beam same position on the second datum line beam be placed with The second Magnetic gauge stand being connected with the second dial gauge.
2. according to claim 1 prefabricated pile Horizontal Displacement and pile body stress joint test device it is characterised in that institute State engineering pile and include pre stressed empty piped piles, pre-stress hollow square pile and solid square pile.
CN201620870719.5U 2016-08-11 2016-08-11 Combined testing device for horizontal displacement of pile top and stress of pile body of precast pile Expired - Fee Related CN205934996U (en)

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CN201620870719.5U CN205934996U (en) 2016-08-11 2016-08-11 Combined testing device for horizontal displacement of pile top and stress of pile body of precast pile

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Application Number Priority Date Filing Date Title
CN201620870719.5U CN205934996U (en) 2016-08-11 2016-08-11 Combined testing device for horizontal displacement of pile top and stress of pile body of precast pile

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106088173A (en) * 2016-08-11 2016-11-09 青岛理工大学 Combined testing device for horizontal displacement of pile top and stress of pile body of precast pile
CN114197548A (en) * 2021-12-31 2022-03-18 宁波中淳高科股份有限公司 A test device for examining precast pile tensile bearing capacity

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106088173A (en) * 2016-08-11 2016-11-09 青岛理工大学 Combined testing device for horizontal displacement of pile top and stress of pile body of precast pile
CN106088173B (en) * 2016-08-11 2019-04-02 青岛理工大学 Combined testing device for horizontal displacement of pile top and stress of pile body of precast pile
CN114197548A (en) * 2021-12-31 2022-03-18 宁波中淳高科股份有限公司 A test device for examining precast pile tensile bearing capacity

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CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20170208

Termination date: 20190811