CN102535530A - Miniature pile model used for model tests and manufacturing method thereof - Google Patents
Miniature pile model used for model tests and manufacturing method thereof Download PDFInfo
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- CN102535530A CN102535530A CN2011104497861A CN201110449786A CN102535530A CN 102535530 A CN102535530 A CN 102535530A CN 2011104497861 A CN2011104497861 A CN 2011104497861A CN 201110449786 A CN201110449786 A CN 201110449786A CN 102535530 A CN102535530 A CN 102535530A
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Abstract
The invention relates to a miniature pile model used for model tests and a manufacturing method thereof. The miniature pile model used for tests comprises a steel reinforcing cage and a grouting cylinder, the steel reinforcing cage comprises a plurality of longitudinal main reinforcing bars and hooping reinforcing bars, the main reinforcing bars are connected transversely through the hooping reinforcing bars, and the steel reinforcing cage is coated by the grouting cylinder, each main reinforcing bar of the steel reinforcing cage is provided with at least one strain piece, the strain pieces are provided with leads which extend out of the grouting cylinder, and at least one strain piece is arranged on the outer wall of the grouting piece. The manufacturing method of the miniature pile model includes: determining parameters of the miniature pile model, preparing the steel reinforcing cage, setting the strain pieces on the steel reinforcing cage, disposing the steel reinforcing cage into a mould, injecting grouting materials into the mould, maintaining the grouting materials to form the grouting cylinder and setting the strain pieces on the outer wall of the grouting cylinder. Internal structures of the miniature pile model and the original body are identical, and test results including failure mode and distribution law of internal force and the like of the miniature pile are more practical.
Description
Technical field
The present invention relates to a kind of mini pile model, particularly relate to a kind of mini pile model that is used for model testing and preparation method thereof.
Background technology
Mini pile is meant the bored pile of diameter at 90～300mm, is used in the ground stabilization at first, is applied to gradually afterwards in preventing land slide and the slope reinforcement engineering.Because mini pile has non-excavating construction,, advantage such as speed of application fast little to the gliding mass disturbance, in the limit preventing land slide especially comes down emergent the reinforcing, has obtained extensive use in recent years.But because the applicating history of mini pile in preventing land slide is shorter; People are also not comprehensive to its stress deformation rule understanding under the effect of landslide; Especially mini pile stake footpath is less, and slenderness ratio is big, and many forms with a clump of piles are laid in the engineering; Pile-soil interaction mechanism is complicated, and causing does not still have generally acknowledged appropriate design method at present.Therefore, propose mini pile rational method for designing in preventing land slide, promote the extensive use of mini pile in preventing land slide, at first should fully understand the proterties of mini pile under the effect of landslide, comprise stressing conditions, distribution of internal force rule and failure mode etc.
Present method of testing mainly contains two kinds of field trial and physical experiments.Field trial is in actual engineering, to lay monitoring element to monitor; Physical experiments is according to certain similar proportion design experiment model, and manual manufacture landslide model and mini pile model slide the landslide model through means such as loadings, monitor the stress deformation situation of mini pile with this.
Field trial meets reality most; But also there are some shortcomings; Mainly contain: 1. actual mini pile is to construct through the technology of boring-insertion reinforcing cage-slip casing by pressure; Because the aperture is less, darker, cause the laying of monitoring elements such as pressure cell to be difficult to realize, so the stressing conditions of mini pile can't be monitored; 2. actual engineering all is to be purpose with the control; Given certain safety factor during design; Therefore the landslide is in stable state behind the miniature pile construction, and the data of various monitoring elements change not quite basically, can not draw the distribution of internal force rule and the failure mode of mini pile.
But physical experiments autonomous Design model; Through the mode that loads the landslide model is slided; Can obtain mini pile from stressed to the overall process proterties of destroying, therefore at present the research mini pile on the landslide method of employing physical experiments usually during the following proterties of effect.When carrying out physical experiments, the mini pile model of selecting for use rationally whether, result of the test is had than significant effects.
In the existing model testing, common with aluminum pipe or single steel bar as the mini pile model.Because actual mini pile is that reinforcing cage, tendon or steel pipe are wrapped up in cement mortar or concrete reinforced concrete structure outward; Adopt aluminum pipe or reinforcing bar can not well simulate the mini pile and the situation that contacts of ground on every side, and the failure mode of aluminum pipe is also different with the mini pile of actual reinforced concrete structure as the mini pile model.
Summary of the invention
Main purpose of the present invention is; Overcome the defective that existing mini pile model exists; And a kind of mini pile model of new structure is provided, technical problem to be solved is to make it meet the mini pile in the practical application more, thereby can carry out experimental study more accurately.
The object of the invention and solve its technical problem and adopt following technical scheme to realize.According to a kind of mini pile model that is used to test that the present invention proposes, it comprises: reinforcing cage comprises many lengthways main steel bars and the stirrup that these main muscle laterally are connected; Injecting cement paste is cylinder body shape, and described reinforcing cage is coated; The main muscle of described reinforcing cage is provided with at least one foil gauge, and this foil gauge is provided with lead, and this lead stretches out injecting cement paste; Also be provided with at least one foil gauge on the outer wall of described injecting cement paste.The material of described injecting cement paste is the mixture of cement, cement mortar, gypsum or cement mortar and gypsum.
The object of the invention and solve its technical problem and also adopt following technical scheme to realize.The preparation method of the mini pile model that is used to test that proposes according to the present invention may further comprise the steps:
Confirm the parameter of mini pile model; The preparation reinforcing cage; Foil gauge is set on reinforcing cage; Reinforcing cage is placed in the mould, in mould, adds injecting paste material; The injecting paste material maintenance forms injecting cement paste; At the injecting cement paste outer wall foil gauge is set.Preferable, the parameter step of described definite mini pile model comprises: confirm stake footpath, arrangement of reinforcement sectional area, the modulus of elasticity of mini pile model, the form of reinforcement and the injecting cement paste material of mini pile model.On reinforcing cage every at a distance from 10-50cm be provided with one group laterally outwardly directed to medium-height trestle, be used for keeping placed in the middle after reinforcing cage is put into mould.The step that foil gauge is set comprises: confirm the position of foil gauge, with the sliding side of the back of the body foil gauge is set in pairs in the sliding side of meeting of mini pile model glide direction along the landslide; Foil gauge is installed, the foil gauge installation site of polishing successively, cleaning, stickup foil gauge and maintenance operation; Each foil gauge all connects a section lead.Describedly comprise: after the foil gauge installation site is polished, cleaned, paste foil gauge in the step that foil gauge is set on the reinforcing cage; The step that foil gauge is set at the injecting cement paste outer wall comprises: after the foil gauge installation site is polished, cleaned, coat the epoxy resin of skim, treat after the epoxy epoxy resin to be polished, cleaned, paste pile body surface strain sheet then.
By technique scheme, the present invention is used for mini pile model of model testing and preparation method thereof and has advantage at least:
(1) adopt or materials similar analogue formation identical with prototype, make the inner structure form identical (be arrangement of reinforcement and wrap up in injecting paste material outward) of mini pile model and prototype, the results such as failure mode and distribution of internal force rule that test the mini pile that draws relatively meet reality;
(2) paste pile body surface strain sheet, distortion that can clear and definite pile body injecting paste material and cracking situation (especially at first take place destroy position);
(3) adopt plastic pipe as mould, convenient, practical, reinforcing bar foil gauge lead is drawn the influence that reduces the physical indexs such as bending rigidity of mini pile model nearby.
In sum, mini pile model that is used for model testing of the present invention and preparation method thereof, it has above-mentioned many advantages and practical value, and has produced handy and practical effect.
Above-mentioned explanation only is the general introduction of technical scheme of the present invention, understands technological means of the present invention in order can more to know, and can implement according to the content of manual, below with preferred embodiment of the present invention and conjunction with figs. specify as after.
Description of drawings
Fig. 1 is the cross section structure sketch map that is used for the mini pile model of model testing of the present invention.
Fig. 2 is the structural representation in the preparation mini pile model process of the present invention.
The specific embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention; Below in conjunction with accompanying drawing and preferred embodiment; To the mini pile model that is used for model testing that proposes according to the present invention and preparation method thereof its specific embodiment, structure, characteristic and effect thereof, specify as after.
The concrete steps of this method comprise:
(1) the mini pile model parameter confirms.
The parameter of the mini pile prototype of studying is: the long L=12m of stake, stake footpath D=300mm; Arrangement of reinforcement adopts the reinforcing bar of 6 diameter d=28mm, and form is a reinforcing cage; Pile body adopts cement mortar to build.
According to test conditions, stake long the L '=2m of mini pile model in the confirmed test, then geometric similarity compares C
L=L/L '=6.The material of confirming the mini pile model is reinforcing bar and cement mortar, then modulus of elasticity likelihood ratio C
E=1.With geometric similarity than with the modulus of elasticity likelihood ratio is the basic likelihood ratio, according to the theory of similarity, can calculate the likelihood ratio of each related physical quantity, confirm each parameter of mini pile model according to this: stake is D '=50 millimeter directly, arrangement of reinforcement sectional area A
S'=103mm
2, get 4 diameter d '=reinforcing bar of 6mm, be welded into the reinforcing cage form; Cement mortar protective course thickness is got 5mm.
(2) make reinforcing cage by the form of reinforcement of the mini pile model of confirming.As depicted in figs. 1 and 2, the reinforcing cage of present embodiment is made up of with the stirrup 2 that these main muscle laterally are connected 4 lengthways main steel bars 1, and described stirrup 2 can be provided with many on main muscle vertical direction.On main muscle, be provided with foil gauge 6, this foil gauge is connected with lead 8.On the vertical direction of main muscle 1, every weld one group to medium-height trestle 5 at a distance from 30cm, can keep placed in the middle after making reinforcing cage put into mould 4.Injecting cement paste 3 is a cylinder body shape, and described reinforcing cage is coated fully, and described lead 8 stretches out this injecting cement paste.On this injecting cement paste outer wall, also be provided with foil gauge 7, and be connected with lead.
(3) paste foil gauge.The purpose of pasting foil gauge is for the strain at each position of test mini pile model pile body, can further be converted into moment of flexure and shearing.Foil gauge divides on the reinforcing bar two kinds of foil gauges and pile body surface strain sheet.At first confirm the position of foil gauge measuring point according to test objective, generally paste in pairs with the sliding side of the back of the body in the sliding side of meeting of mini pile model glide direction along the landslide that the foil gauge spacing can design as required voluntarily, sliding surface should be encrypted with near the foil gauge the stake top.Should be during stickup in strict accordance with the stickup operation of foil gauge, i.e. the order of polishing-cleaning-stickup-maintenance is carried out, and carries out the waterproof of foil gauge and the protection work of lead, and each foil gauge all picks out the lead about the about 20cm of a segment length.
(4) make mould.Because the mini pile model is a cross section is circular long pole structure, and the plastic pipe that can adopt hard is as mould 4 (like pvc pipe), and the internal diameter of selected mould should be identical with mini pile Model Pile footpath.During making, mould is longitudinally cut open, reinforcing cage is put into mould, and boring on the mould of foil gauge present position (aperture slightly surpasses diameter of wire and gets final product), lead is drawn outside the mould.With the opening sealing of adhesive tape with mould, the spillage phenomenon takes place when preventing slip casting, and with iron wire mould is carried out the anchor hoop, mould tympanites distortion then when preventing slip casting.
(5) slip casting.The one end envelope of mould is real, carry out slip casting from the other end.Injecting paste material is confirmed according to the modulus of elasticity that calculates gained, is generally the mixture of cement mortar or cement, gypsum and water or the mixture of cement mortar and gypsum.Adopt vibratory tool such as vibrating head that slurries are fully vibrated during slip casting, make slurry placement closely knit.
(6) maintenance.After slip casting was accomplished, placing 24 hours was collapsible die (can adjust striking time according to the difference of material therefor), after this carries out maintenance by corresponding maintenance process.
(7) paste pile body surface strain sheet.After the maintenance of mini pile model is accomplished, paste pile body surface strain sheet, paste in pairs with the sliding side of the back of the body in the sliding side of meeting of mini pile model glide direction along the landslide usually, the foil gauge spacing can design as required voluntarily, and sliding surface should be encrypted with near the foil gauge the stake top.During making; After the position that corresponding pile body surface is needed to paste foil gauge is polished, cleaned, coat the epoxy resin of skim, treat that it solidifies the back epoxy resin is polished, cleaned; Paste pile body surface strain sheet then, and carry out lead fixed and protection, foil gauge waterproof measure.
The above only is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction; Though the present invention discloses as above with preferred embodiment; Yet be not in order to limiting the present invention, anyly be familiar with the professional and technical personnel, in not breaking away from technical scheme scope of the present invention; When the technology contents of above-mentioned announcement capable of using is made a little change or is modified to the equivalent embodiment of equivalent variations; In every case be the content that does not break away from technical scheme of the present invention, to any simple modification, equivalent variations and modification that above embodiment did, all still belong in the scope of technical scheme of the present invention according to technical spirit of the present invention.
Claims (7)
1. mini pile model that is used to test is characterized in that it comprises:
Reinforcing cage comprises many lengthways main steel bars and the stirrup that these main muscle laterally are connected;
Injecting cement paste is cylinder body shape, and described reinforcing cage is coated;
The main muscle of described reinforcing cage is provided with at least one foil gauge, and this foil gauge is provided with lead, and this lead stretches out injecting cement paste;
Also be provided with at least one foil gauge on the outer wall of described injecting cement paste.
2. the mini pile model that is used to test according to claim 1, the material that it is characterized in that described injecting cement paste is the mixture of cement, cement mortar, gypsum or cement mortar and gypsum.
3. the preparation method of claim 1 or the 2 described mini pile models that are used to test is characterized in that may further comprise the steps:
Confirm the parameter of mini pile model;
The preparation reinforcing cage;
Foil gauge is set on reinforcing cage;
Reinforcing cage is placed in the mould, in grinding tool, adds injecting paste material;
The injecting paste material maintenance forms injecting cement paste;
At the injecting cement paste outer wall foil gauge is set.
4. the preparation method of the mini pile model that is used to test according to claim 3 is characterized in that the parameter step of described definite mini pile model comprises: confirm stake footpath, arrangement of reinforcement sectional area, the modulus of elasticity of mini pile model, the form of reinforcement and the injecting cement paste material of mini pile model.
5. the preparation method of the mini pile model that is used to test according to claim 4, it is characterized in that also being included on the reinforcing cage every at a distance from 10-50cm be provided with one group laterally outwardly directed to medium-height trestle, be used for keeping placed in the middle after reinforcing cage is put into mould.
6. the preparation method of the mini pile model that is used to test according to claim 4 is characterized in that the described step that foil gauge is set comprises:
Confirm the position of foil gauge, with the sliding side of the back of the body foil gauge is set in pairs in the sliding side of meeting of mini pile model glide direction along the landslide;
Foil gauge is installed, the foil gauge installation site of polishing successively, cleaning, stickup foil gauge and maintenance operation;
Each foil gauge all connects a section lead.
7. the preparation method of the mini pile model that is used to test according to claim 3 is characterized in that, describedly comprises in the step that foil gauge is set on the reinforcing cage: after the foil gauge installation site is polished, cleaned, paste foil gauge;
The described step that foil gauge is set at the injecting cement paste outer wall comprises: after the foil gauge installation site is polished, cleaned, coat the epoxy resin of skim, treat after the epoxy epoxy resin to be polished, cleaned, paste foil gauge then.
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| CN2011104497861A CN102535530A (en) | 2011-12-29 | 2011-12-29 | Miniature pile model used for model tests and manufacturing method thereof |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103499492A (en) * | 2013-10-01 | 2014-01-08 | 浙江工业职业技术学院 | Device and method for testing load in pile-end post-grouting chamber |
| CN104458377A (en) * | 2014-12-13 | 2015-03-25 | 广西科技大学 | Method for manufacturing specimens containing CFRP-PCPs (carbon fiber reinforced polymer-prestressed concrete prisms) composite rebars |
| CN104594394A (en) * | 2014-11-28 | 2015-05-06 | 长安大学 | Method for making model pile |
| CN105064426A (en) * | 2015-09-08 | 2015-11-18 | 深圳市路桥建设集团有限公司 | Indoor testing device for minitype grouting gravel steel pipe piles and testing method of indoor testing device |
| CN105115634A (en) * | 2015-08-17 | 2015-12-02 | 青岛理工大学 | A cylinder hoop strain soil pressure transducer and a measurement method |
| CN105628465A (en) * | 2015-12-25 | 2016-06-01 | 龙岩学院 | Pressurized grouting material forming square sample mold and grouting forming method |
| CN106049557A (en) * | 2016-05-24 | 2016-10-26 | 同济大学 | Indoor testing device for simulating grouting pile end post-grouting and testing method |
| CN106337447A (en) * | 2016-09-30 | 2017-01-18 | 国网天津市电力公司 | Arrangement method for steel bar strain gauge of pipe pile |
| CN106769318A (en) * | 2017-01-04 | 2017-05-31 | 浙江大学城市学院 | A kind of pre-manufactured model stake for electric osmose joint stake reinforcing soft ground model test and preparation method thereof |
| CN107989080A (en) * | 2018-01-04 | 2018-05-04 | 宁波大学 | A kind of fabricated rectangular model stake and preparation method thereof |
| CN109870298A (en) * | 2019-03-29 | 2019-06-11 | 西安工业大学 | A kind of evaluation method for simulating mini pile rigid connection structure antiskid performance |
| CN110067253A (en) * | 2019-06-05 | 2019-07-30 | 招商局重庆交通科研设计院有限公司 | From anchoring miniature steel pipe anchoring pile |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6490088A (en) * | 1987-09-30 | 1989-04-05 | Dai Ichi Kogyo Seiyaku Co Ltd | Production of water containing h+ ion |
| JPH1090088A (en) * | 1996-04-26 | 1998-04-10 | Shimizu Corp | Foundation pile |
| CN2869820Y (en) * | 2005-10-12 | 2007-02-14 | 电子科技大学中山学院 | Weight-bearing column stress measuring apparatus for moving integrally building |
| CN201390968Y (en) * | 2009-04-15 | 2010-01-27 | 中铁二院工程集团有限责任公司 | Rock-soil slope micro pile antiskid structure |
| CN201722711U (en) * | 2010-05-13 | 2011-01-26 | 机械工业勘察设计研究院 | Internal force testing device for PHC tubular pile load test |
| CN102330438A (en) * | 2011-07-13 | 2012-01-25 | 中国地质科学院地质力学研究所 | Method for testing characters of micro piles in landslide control |
-
2011
- 2011-12-29 CN CN2011104497861A patent/CN102535530A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6490088A (en) * | 1987-09-30 | 1989-04-05 | Dai Ichi Kogyo Seiyaku Co Ltd | Production of water containing h+ ion |
| JPH1090088A (en) * | 1996-04-26 | 1998-04-10 | Shimizu Corp | Foundation pile |
| CN2869820Y (en) * | 2005-10-12 | 2007-02-14 | 电子科技大学中山学院 | Weight-bearing column stress measuring apparatus for moving integrally building |
| CN201390968Y (en) * | 2009-04-15 | 2010-01-27 | 中铁二院工程集团有限责任公司 | Rock-soil slope micro pile antiskid structure |
| CN201722711U (en) * | 2010-05-13 | 2011-01-26 | 机械工业勘察设计研究院 | Internal force testing device for PHC tubular pile load test |
| CN102330438A (en) * | 2011-07-13 | 2012-01-25 | 中国地质科学院地质力学研究所 | Method for testing characters of micro piles in landslide control |
Non-Patent Citations (1)
| Title |
|---|
| 闫金凯: "滑坡微型桩防治技术大型物理模型试验研究", 《中国优秀博士学位论文全文数据库 基础科学辑》, no. 11, 15 November 2010 (2010-11-15) * |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103499492A (en) * | 2013-10-01 | 2014-01-08 | 浙江工业职业技术学院 | Device and method for testing load in pile-end post-grouting chamber |
| CN104594394A (en) * | 2014-11-28 | 2015-05-06 | 长安大学 | Method for making model pile |
| CN104458377A (en) * | 2014-12-13 | 2015-03-25 | 广西科技大学 | Method for manufacturing specimens containing CFRP-PCPs (carbon fiber reinforced polymer-prestressed concrete prisms) composite rebars |
| CN105115634A (en) * | 2015-08-17 | 2015-12-02 | 青岛理工大学 | A cylinder hoop strain soil pressure transducer and a measurement method |
| CN105064426B (en) * | 2015-09-08 | 2017-03-29 | 深圳市路桥建设集团有限公司 | Miniature slip casting rubble steel-pipe pile laboratory testing rig and its test method |
| CN105064426A (en) * | 2015-09-08 | 2015-11-18 | 深圳市路桥建设集团有限公司 | Indoor testing device for minitype grouting gravel steel pipe piles and testing method of indoor testing device |
| CN105628465A (en) * | 2015-12-25 | 2016-06-01 | 龙岩学院 | Pressurized grouting material forming square sample mold and grouting forming method |
| CN106049557A (en) * | 2016-05-24 | 2016-10-26 | 同济大学 | Indoor testing device for simulating grouting pile end post-grouting and testing method |
| CN106337447A (en) * | 2016-09-30 | 2017-01-18 | 国网天津市电力公司 | Arrangement method for steel bar strain gauge of pipe pile |
| CN106769318A (en) * | 2017-01-04 | 2017-05-31 | 浙江大学城市学院 | A kind of pre-manufactured model stake for electric osmose joint stake reinforcing soft ground model test and preparation method thereof |
| CN107989080A (en) * | 2018-01-04 | 2018-05-04 | 宁波大学 | A kind of fabricated rectangular model stake and preparation method thereof |
| CN107989080B (en) * | 2018-01-04 | 2023-08-22 | 宁波宁大工程建设监理有限公司 | Assembled rectangular model pile and manufacturing method thereof |
| CN109870298A (en) * | 2019-03-29 | 2019-06-11 | 西安工业大学 | A kind of evaluation method for simulating mini pile rigid connection structure antiskid performance |
| CN110067253A (en) * | 2019-06-05 | 2019-07-30 | 招商局重庆交通科研设计院有限公司 | From anchoring miniature steel pipe anchoring pile |
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Application publication date: 20120704 |