CN106351267A - Pile foundation bearing characteristic model testing device under down-pressing static load effect - Google Patents

Pile foundation bearing characteristic model testing device under down-pressing static load effect Download PDF

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Publication number
CN106351267A
CN106351267A CN201610884319.4A CN201610884319A CN106351267A CN 106351267 A CN106351267 A CN 106351267A CN 201610884319 A CN201610884319 A CN 201610884319A CN 106351267 A CN106351267 A CN 106351267A
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CN
China
Prior art keywords
model
pile foundation
pile
static load
amesdial
Prior art date
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Pending
Application number
CN201610884319.4A
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Chinese (zh)
Inventor
孙雅珍
刘畅
王金昌
顾章义
苑学众
孙顺熹
丁传超
潘嘉伟
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Shenyang Jianzhu University
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Shenyang Jianzhu University
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Application filed by Shenyang Jianzhu University filed Critical Shenyang Jianzhu University
Priority to CN201610884319.4A priority Critical patent/CN106351267A/en
Publication of CN106351267A publication Critical patent/CN106351267A/en
Pending legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D33/00Testing foundations or foundation structures

Abstract

The invention relates to a pile foundation bearing characteristic model testing device under a down-pressing static load effect. The pile foundation bearing characteristic model testing device comprises a model box, a pile model, a vertical down-pressing loading system and a measurement device, wherein the model box is a steel ribbed box body with an opening formed in the upper portion, the pile foundation model is connected with a loading lever assembly and is arranged in the model box, the vertical down-pressing loading system consists of the loading lever assembly, a vertical guide rail and weights. The measurement device comprises four dial indicators for measuring the vertical settling volume of a pile top. The pile foundation bearing characteristic model testing device is wide in application range and simple and convenient to load, the model pile is stably loaded, the vertical displacement of the pile top of the pile foundation model can be accurately measured, and research on a pile foundation bearing characteristic model test under the down-pressing static load effect can be conveniently and effectively performed.

Description

Push the pile foundation bearer properties model test apparatus under action of static load
Technical field
The present invention relates to a kind of pile foundation model test apparatus, push the pile foundation under action of static load and hold particularly to a kind of Carry characteristic model assay device.
Background technology
Pile foundation is compared with conventional cast-in-situ bored pile, have bearing capacity compared with high, construction site is little, speed of application is fast, to soil The advantages of layer strong adaptability, arrangement form are flexible, reinforces, builds in transmission tower, pattern foundation pit supporting structure, extending old building, flood control dam It is widely used in the engineering fields such as thing reinforcing.
For the research of pile foundation resistance to compression bearer properties aspect, mainly there are field test and the mode of indoor model test. Although field test can preferably reflect engineering practice, due to by place limited space, duration anxiety, instrument and equipment Embedded difficult, expense costly etc. the restriction of factor and cannot be widely used.And indoor model test can be directed to The deficiency to make up field test for the main aspect development of the engineering subject matter research targetedly, repeatable, thus Become research and design, solve the problems, such as one of effective ways of Practical Project.In view of the foregoing, carry out indoor model examination Test and be particularly important.
The key technology of stake resistance to compression bearer properties indoor model test is how to carry out simple and fast to Model Pile and have The loading of effect, and traditional pile foundation model test apparatus, are vertically pushed load and are generally joined by preloading or jack and reaction beam Close and apply, jack oil pressure unstable it is impossible to long-time sustained loading, range for pile foundation model test load too Greatly it is impossible to accurately be loaded, and it is not provided with the measurement apparatus of stake top vertical displacement so that result of the test can not be exactly Reflection practical situation.Therefore a kind of making of design is simple, it is simple and direct to load, Model Pile load-bearing is stablized, can efficiently and accurately be surveyed Stake top vertical displacement with vertically push load change thus obtaining a model test apparatus for resistance to compression bearer properties is one Significantly work.
Content of the invention
In order to solve the technological deficiency that current pile foundation model test apparatus exist, the present invention provides a kind of scope of application Extensively, the pile foundation bearer properties model test apparatus pushing under action of static load that load mode is simple and direct, accuracy is higher.
The technical solution used in the present invention is: push the pile foundation bearer properties model test apparatus under action of static load, its Composition includes model casing, pile foundation model, vertically pushes loading system and measurement apparatus;
For the ease of viewing test state it is ensured that the intensity of model casing, model casing is the ribbing steel casing of upper opening, outside it It is provided with channel-section steel Reinforced Hoop, placed inside has pile foundation model.Described model casing is made up of ribbing steel plate, is provided with outside model casing Lower two-layer channel-section steel Reinforced Hoop, is horizontally arranged with a channel-section steel Reinforced Hoop at model casing internal upper part opening, parallel longitudinal be provided with two Bar channel-section steel Reinforced Hoop.
The described composition vertically pushing loading system includes loading lever assembly, vertical guide and counterweight;Pile foundation model It is connected with loading lever assembly, and be arranged in model casing;Described loading lever assembly includes loading lever, load bar, fixation Hinged-support, wire and scale pan, in order to maintain the stability vertically pushing loading direction, make the whole series push loading system simultaneously Detachably, load bar top is connected by the connected mode of bolted splice with loading lever, and the fulcrum one end loading lever leads to The connected mode crossing bolted splice is connected with fixed-hinged support, and fixed-hinged support is fixedly welded on the channel-section steel on the outer upper strata of model casing On Reinforced Hoop, the other end loading lever is provided with preformed hole, and wire one end passes through the preformed hole loading lever and loading thick stick Bar is connected, and the wire other end is connected with scale pan, and wire keeps vertical direction;Counterweight puts on scale pan;Institute State pile foundation model to be connected with load bar bottom;
Described measurement apparatus include amesdial and the dial indicators rack measuring stake top Vertical Settlement amount.
Vertically vertical guide is offered in the middle part of the channel-section steel Reinforced Hoop of horizontally set, described load bar passes through in described model casing Inside vertical guide, and can vertically move under guide rail in the vertical direction.
The top of described pile foundation model is disposed with pile crown guard circle and backing plate, and pile crown guard circle material is rubber, Backing plate is square plank;Pile crown guard circle is used for protecting the pile crown of pile foundation model, and the load that pushes as pile foundation model is subject to Force, backing plate is used for adjusting the contact between pile foundation model and load bar.
Described measurement apparatus are provided with four amesdials, and are all symmetrically fixed on along the vertical applied force direction of pile foundation model Four angles of square backing plate, table body keeps vertically, and measurement head contacts backing plate, and each amesdial is correspondingly arranged on amesdial respectively and props up Frame, dial indicators rack is located at parallel longitudinal in model casing being provided with two channel-section steel Reinforced Hoop respectively.
Described backing plate is arranged on the following of load bar and by bolt, load bar is fixed on backing plate.
Described loading lever is H type steel, and rigidity is larger, is unlikely to deform, and such that it is able to be more effectively carried out loading, improves examination The accuracy tested.
Digital display electronic formula amesdial selected by described amesdial, and degree of accuracy is high, and reading is directly perceived, and has memory function, thus Displacement at pile top can accurately and efficiently be recorded.
Described counterweight can be by different combining forms, and different to Model Pile applying pushes load, and controlled range is wide, especially It is required push load less when, can more accurately and efficiently be loaded so that Model Pile load-bearing is stable, It is convenient to load.
Compared with prior art, the invention has the advantages that
1. the pile foundation model test apparatus of the present invention are applied widely, it is simple to make, it is simple and direct to load, accuracy is higher, model Stake load-bearing is stable, and breaching traditional experiment device can only realize vertically pushing loading using jack and reaction beam cooperation Limitation;
2. the present invention utilizes lever principle, and power point, the position of main force point can be adjusted flexibly, thus it is difficult to substantially reduce test Degree;
3. the present invention passes through to change the effect that the arm of force can play saving loading force;
4. load mode of the present invention is greatly simplified, only need to place different counterweights on the scale pan outside in model casing and just can reach To the purpose applying different loads, and controlled range is wide, especially required push load less when, can more accurately and Effectively loaded, so that Model Pile load-bearing is stable, it is convenient to load;
5. the present invention can record stake top vertical displacement effectively with the change vertically pushing load, and accuracy of reading is directly perceived, thus Obtain a resistance to compression bearer properties.
Brief description
Below in conjunction with the accompanying drawings the present invention is further described.
Fig. 1 is the front view of the present invention;
Fig. 2 is the top view of the present invention;
Fig. 3 is the vertical guide partial side view of the present invention;
In figure: 1, model casing;2nd, model clay;3rd, channel-section steel Reinforced Hoop;4th, load lever;5th, bolt;6th, pile foundation model;7th, thousand points Table;8th, load bar;9th, vertical guide;10th, preformed hole;11st, wire;12nd, scale pan;13rd, fixed-hinged support;14th, pile crown is protected Guard ring;15th, backing plate;16th, dial indicators rack.
Specific embodiment
As shown in Fig. 1 ~ Fig. 3, a kind of pile foundation bearer properties model test apparatus pushing under action of static load, including model Case 1, pile foundation model 6, vertically push loading system and measurement apparatus;
For the ease of viewing test state it is ensured that the intensity of model casing 1, model casing 1 is the ribbing steel casing of upper opening, its It is externally provided with channel-section steel Reinforced Hoop 3, placed inside has pile foundation model 6.
Described model casing 1 is made up of ribbing steel plate, is provided with upper and lower two-layer channel-section steel Reinforced Hoop 3, model casing 1 outside model casing 1 It is horizontally arranged with a channel-section steel Reinforced Hoop 3 at internal upper part opening, parallel longitudinal be provided with two channel-section steel Reinforced Hoop 3.
The described composition vertically pushing loading system includes loading lever assembly, vertical guide 9 and counterweight;Pile foundation model 6 are connected with loading lever assembly, and are arranged in model casing 1.Described loading lever assembly include load lever 4, load bar 8, Fixed-hinged support 13, wire 11 and scale pan 12, in order to maintain the stability vertically pushing loading direction, make under the whole series simultaneously Pressure loading system is detachable, and load bar 8 top is connected by the hinged connected mode of bolt 5 with loading lever 4, loads lever 4 fulcrum one end is passed through the hinged connected mode of bolt 5 and is connected with fixed-hinged support 13, and fixed-hinged support 13 is fixedly welded on On the channel-section steel Reinforced Hoop 3 on the outer upper strata of model casing 1, the other end loading lever 4 is provided with preformed hole 10, and wire 11 one end passes through The preformed hole 10 loading lever 4 is connected with loading lever 4, and wire 11 other end is connected with scale pan 12, and wire 11 Keep vertical direction;Counterweight puts on scale pan 12;Described pile foundation model 6 is connected with load bar 8 bottom;
Described measurement apparatus include amesdial 7 and the dial indicators rack 16 measuring stake top Vertical Settlement amount.
Vertical guide 9 is vertically offered in the middle part of the channel-section steel Reinforced Hoop 3 of horizontally set at described model casing 1 inner opening, described Load bar 8 passes through inside vertical guide 9, and load bar 8 is constrained in the horizontal direction by vertical guide 9, and can vertically guide rail 9 exist Vertical direction moves up and down.
The top of described pile foundation model 6 is disposed with pile crown guard circle 14 and backing plate 15, pile crown guard circle 14 material For rubber, backing plate 15 is square plank;Pile crown guard circle 14 is used for protecting the pile crown of pile foundation model 6, as pile foundation model 6 Push load stress point, backing plate 15 is used for adjusting contact between pile foundation model 6 and load bar 8.
Described measurement apparatus are provided with four amesdials 7, and amesdial 7 is all along the vertical applied force direction of pile foundation model 6 It is symmetrically fixed on four angles of square backing plate 15, amesdial 7 table body keeps vertically, measurement head contacts backing plate 15,7 points of each amesdial It is not correspondingly arranged on dial indicators rack 16, dial indicators rack 16 is parallel longitudinal at model casing 1 inner opening respectively to be provided with two On bar channel-section steel Reinforced Hoop 3.
Described backing plate 15 is arranged on the following of load bar 8 and by bolt, load bar 8 is fixed on backing plate 15.
Described loading lever 4 is H type steel, and rigidity is larger, is unlikely to deform, and such that it is able to be more effectively carried out loading, improves The accuracy of test.
Digital display electronic formula amesdial selected by described amesdial 7, and degree of accuracy is high, and reading is directly perceived, and has memory function, thus Displacement at pile top can accurately and efficiently be recorded.
Described counterweight can be by different combining forms, and different to Model Pile applying pushes load, and controlled range is wide, especially It is required push load less when, can more accurately and efficiently be loaded so that Model Pile load-bearing is stable, It is convenient to load.
The work process of this device: model clay 2 used by filling test in model casing 1, embedding pile foundation mould in model clay 2 Type 6, can carry out single pile, multi-column pier foundation pushes the half module of bearer properties or full mould is tested, adjustment loads the position of lever 4, makes Load bar 8 and pile foundation model 6 are in same plane;Position on loading lever 4 for the adjustment load bar 8, makes the bottom of load bar 8 The central upper portion of portion's align piles basic model 6, and fixing;Dispose pile crown guard circle 14 He in the stake top of pile foundation model 6 successively Backing plate 15;Four dial indicators racks 16 are fixed on and parallel longitudinal at model casing 1 inner opening are provided with two channel-section steel Reinforced Hoop 3 On, amesdial 7 has four, is installed on dial indicators rack 16, and amesdial 7 is all along pile foundation model 6 vertical applied force direction pair Claim to be fixed on four angles of square backing plate 15, the table body of amesdial 7 keeps vertically, and measurement head contacts backing plate;According to " building pile foundation Inspection specifications " (jgj 106-2014) selects loading scheme and terminates loading standard, and estimate the resistance to compression of pile foundation model 6 Ultimate bearing capacity, is controlled by adding counterweight on scale pan 12, you can pile foundation model 6 is realized apply vertically to push lotus Carry, and load condition (load) can be recorded in time;Data, the stake of record pile foundation model 6 can be collected by measurement apparatus Push up vertical displacement size and take the meansigma methodss of 4 data, the resistance to compression bearer properties of analysis pile foundation model 6.

Claims (7)

1. push the pile foundation bearer properties model test apparatus under action of static load it is characterised in that its composition include model casing, Pile foundation model, vertically push loading system and measurement apparatus;
Described model casing is the ribbing steel casing of upper opening, lays pile foundation model in model casing;Arrange outside model casing There is upper and lower two-layer channel-section steel Reinforced Hoop, at model casing internal upper part opening, be horizontally arranged with a channel-section steel Reinforced Hoop, parallel longitudinal setting There are two channel-section steel Reinforced Hoop;
The described composition vertically pushing loading system includes loading lever assembly, vertical guide and counterweight;
Described loading lever assembly includes loading lever, load bar, fixed-hinged support, wire and scale pan, load bar top It is connected by the connected mode of bolted splice with loading lever, the connection side by bolted splice for the fulcrum one end of loading lever Formula is connected with fixed-hinged support, and fixed-hinged support is fixedly welded on the channel-section steel Reinforced Hoop on the outer upper strata of model casing, loads lever The other end be provided with preformed hole, wire one end pass through load lever preformed hole with loading lever be connected, wire is another One end is connected with scale pan, and wire keeps vertical direction;Counterweight puts on scale pan;Described pile foundation model and loading Bar bottom is connected;
Described measurement apparatus include amesdial and the dial indicators rack measuring stake top Vertical Settlement amount.
2. the pile foundation bearer properties model test apparatus pushing under action of static load according to claim 1, its feature exists In vertically offering vertical guide in the middle part of the channel-section steel Reinforced Hoop of horizontally set at described model casing inner opening, described load bar is worn Cross inside vertical guide, and can vertically move under guide rail in the vertical direction.
3. the pile foundation bearer properties model test apparatus pushing under action of static load according to claim 1, its feature exists In the top of described pile foundation model is disposed with pile crown guard circle and backing plate, and backing plate is square plank, and loop material protected by pile crown Matter is rubber.
4. the pile foundation bearer properties model test apparatus pushing under action of static load according to claim 1, its feature exists In described measurement apparatus are provided with four amesdials, and amesdial is all symmetrically fixed along the vertical applied force direction of pile foundation model In four angles of square backing plate, amesdial table body keeps vertically, and each amesdial is correspondingly arranged on dial indicators rack, amesdial respectively Support is located at parallel longitudinal at model casing inner opening being provided with two channel-section steel Reinforced Hoop respectively.
5. the pile foundation bearer properties model test apparatus pushing under action of static load according to claim 1, its feature exists In described backing plate is arranged on the following of load bar and by bolt, load bar is fixed on backing plate.
6. the pile foundation bearer properties model test apparatus pushing under action of static load according to claim 1, its feature exists In described loading lever is H type steel.
7. the pile foundation bearer properties model test apparatus pushing under action of static load according to claim 1 or 4, its feature It is, digital display electronic formula amesdial selected by described amesdial.
CN201610884319.4A 2016-10-11 2016-10-11 Pile foundation bearing characteristic model testing device under down-pressing static load effect Pending CN106351267A (en)

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106948384A (en) * 2017-03-16 2017-07-14 淮阴工学院 A kind of geotechnological box model pile verticality control and the native compacting apparatus of pile body
CN110067267A (en) * 2019-05-14 2019-07-30 浙江大学宁波理工学院 Load the whirl spraying steel pipe combination stake simulating lab test device and method of various modes

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204385783U (en) * 2014-12-09 2015-06-10 长安大学 A kind of experimental rig of simulating pile foundation anti-bending strength
CN205134394U (en) * 2015-10-27 2016-04-06 山东科技大学 Detect device of suction bucket shape basis resistance to plucking bearing capacity under slope loading
CN105862937A (en) * 2016-05-09 2016-08-17 东华理工大学 Pressing and pulling integrated experimental indoor pile model test device
CN105887946A (en) * 2016-06-17 2016-08-24 同济大学 Indoor experiment device of combined loading of model pile
CN206521775U (en) * 2016-10-11 2017-09-26 沈阳建筑大学 A kind of pile foundation bearer properties model test apparatus pushed under action of static load

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204385783U (en) * 2014-12-09 2015-06-10 长安大学 A kind of experimental rig of simulating pile foundation anti-bending strength
CN205134394U (en) * 2015-10-27 2016-04-06 山东科技大学 Detect device of suction bucket shape basis resistance to plucking bearing capacity under slope loading
CN105862937A (en) * 2016-05-09 2016-08-17 东华理工大学 Pressing and pulling integrated experimental indoor pile model test device
CN105887946A (en) * 2016-06-17 2016-08-24 同济大学 Indoor experiment device of combined loading of model pile
CN206521775U (en) * 2016-10-11 2017-09-26 沈阳建筑大学 A kind of pile foundation bearer properties model test apparatus pushed under action of static load

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106948384A (en) * 2017-03-16 2017-07-14 淮阴工学院 A kind of geotechnological box model pile verticality control and the native compacting apparatus of pile body
CN106948384B (en) * 2017-03-16 2018-11-13 淮阴工学院 A kind of geotechnique's box model pile verticality control and pile body soil compacting apparatus
CN110067267A (en) * 2019-05-14 2019-07-30 浙江大学宁波理工学院 Load the whirl spraying steel pipe combination stake simulating lab test device and method of various modes
CN110067267B (en) * 2019-05-14 2020-11-17 浙江大学宁波理工学院 Indoor simulation experiment device and method for rotary-spraying steel pipe combined pile loaded with multiple modes

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Application publication date: 20170125