CN106323868A - Pullout test device of ribbed bar in earth-rock dam rockfill material and test method thereof - Google Patents
Pullout test device of ribbed bar in earth-rock dam rockfill material and test method thereof Download PDFInfo
- Publication number
- CN106323868A CN106323868A CN201610705749.5A CN201610705749A CN106323868A CN 106323868 A CN106323868 A CN 106323868A CN 201610705749 A CN201610705749 A CN 201610705749A CN 106323868 A CN106323868 A CN 106323868A
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- CN
- China
- Prior art keywords
- ribbed bar
- proof box
- pulling capacity
- pullout
- earth
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/02—Measuring coefficient of friction between materials
Abstract
The invention relates to a pullout test device of a ribbed bar in an earth-rock dam rockfill material and a test method thereof. The pullout test device is provided with a measuring device and a horizontal pullout force applying system and comprises a motor, a speed regulating reducer and a threaded pull rod, wherein a test chamber is arranged in a testing direction, and a rockfill material and a wrapped ribbed bar are placed in the test chamber; symmetrical round holes which can be penetrated by the ribbed bar are formed in the two side walls, and one side of the two side walls is a pullout end; a loading plate is arranged vertical to the horizontal pullout force direction, and a normal loading system is arranged on the loading plate; a pullout force reaction frame is arranged between the pullout end of the test chamber and the measuring device; fixed connection is realized by virtue of a fastening bolt, and a pullout force counter force is provided; and the measuring device is connected with a to-be-tested ribbed bar by virtue of a pullout force and displacement sensor and one ribbed bar sleeve. The pullout test device provided by the invention can be used for solving the problem that normal pressure provided by the traditional pullout test device is too low and the problem of rigid connection between the ribbed bars with different diameters and a pull rod and also can be used for solving the problems of plugging the round holes and keeping the ribbed bars horizontal.
Description
Technical field
The present invention relates to a kind of indoor pull-out test device, belong to Geotechnical Engineering field, this device is mainly used in band rib steel
In muscle indoor pull-out test in earth and rockfill dam stockpile.The invention still further relates to the test method of this assay device.
Background technology
China built or in building dam more than 90% for earth and rockfill dam, high earth-rock works construction experiences and investigate money in a large number
Material all shows, when by seismic loading, due to " whipping effect ", seismic acceleration and permanent deformation near dam crest show
Write other position more than dam, consequently, it is possible to cause the unstability of dam, affect the safety of dam.Reinforcement is a kind of effectively dam
Top strengthening measure for earthquake resistance, is successfully used for the smelting Le Colophonium of the French Kang Keye clarke dam of height of dam 21.2 m, height of dam 125.5 m
Concrete core-wall rock-fill dams, the Nuozhadu earth core rockfill dam of height of dam 261.5 m and the long sill may core wall rockfill dam of height of dam 240 m
Deng, owing to the vibrations of high intensity roll the destructiveness to muscle material, reinforcement material conventional in current earth and rockfill dam stockpile is with ribbing
Reinforcing bar.
Interface friction characteristics between Ribbed Bar and earth and rockfill dam stockpile is the important ginseng of reinforced earth masonry dam engineering design
Number, the pulling capacity that can be obtained by pull-out test reflects with drawing displacement relation, being gradually increased along with pulling capacity in process of the test,
Main damage form shows as the shear stress at Ribbed Bar and stockpile interface and reaches its shearing strength, and interface produces shearing slip
Phenomenon.Affect a lot of because have of interface friction characteristics, mainly have drawing speed, the diameter of reinforcing bar, the dimensional effect of proof box,
And stockpile porosity, gradation composition, moisture content and suffered burden pressure.
The pull-out test carrying out Ribbed Bar in earth and rockfill dam stockpile has its particularity, mainly has 3 points.First, with ribbing
The reinforcement position of reinforcing bar is usually more than the 1/3 of earth and rockfill dam height, therefore the high earth and rockfill dam orlop reinforcing body of more than 300m
Burden pressure can reach 2 Mpa, and the pressure that traditional pull-out test device provides is too small；Secondly, stockpile belongs to coarse-grained soil, must
Stockpile must use in proof box high intensity vibrations roll and just can reach maximum dry density, in order to avoid to test dress
The damage at other position in putting, proof box should be designed as departing from body.Finally, in test, Ribbed Bar should fill sample at whole filler
During keep level, can be rigidly connected easily between Ribbed Bar and the pull bar of different-diameter, traditional pull-out test
Device cannot realize.
Summary of the invention
The problem existed for above tradition indoor pull-out test device, the purpose of patent of the present invention is for providing a kind of with ribbing
Reinforcing bar pull-out test device in stockpile, the present invention also will provide the test method of this assay device.This device with
Method can have a following three points function:
1. stockpile can be provided the high burden pressure of at least 2 Mpa.
2. can realize being rigidly connected of different band rib reinforcement diameter and pull bar, and reinforcing bar can be made to keep during filler
Level.
3. proof box can be realized for body can be departed from.
For achieving the above object, following technical proposals is used: the drawing examination in earth and rockfill dam stockpile of a kind of Ribbed Bar
Experiment device, is provided with measuring equipment and horizontal pulling capacity application system；This horizontal pulling capacity application system includes that motor, speed governing are slowed down
Device, thread, wherein motor provides pulling force, and speed regulating reducing controls drawing speed；It is characterized in that, be provided with at measurement direction
Proof box, places the Ribbed Bar of parcel, proof box two side in stockpile to be tested and this stockpile in described proof box
Arranging the symmetrical circular hole passed for Ribbed Bar, wherein side is drawing end；Hanging down with horizontal pulling capacity direction of described proof box
Directly being provided with load plate, this load plate is provided with normal direction loading system；It is provided with between drawing end and the measuring equipment of proof box
Pulling capacity reaction frame；This pulling capacity reaction frame is connected by fastening bolt is fixing with proof box, it is provided that pulling capacity counter-force；Measure dress
Put and horizontal pulling capacity application system is with ribbing with to be tested by pulling capacity and displacement transducer and Ribbed Bar sleeve
Bar connecting.
Being provided with hollow disk in the symmetrical circular hole of proof box two side, this hollow disk is made by rubber, wraps up reinforcing bar
Embed in circular hole, be possible not only to block dropping of filler when circular hole prevents from rolling vibrations, but also assume responsibility for fixing and keep band
The effect of rib reinforcement level.
Described Ribbed Bar sleeve one end is provided with screw thread, to connect Ribbed Bar and the screw thread stayed mast of different-diameter,
Realization is rigidly connected.The Ribbed Bar of different-diameter only need to be polished into the silk head of uniform diameters；Described pulling capacity and displacement
Sensor is connected in Ribbed Bar, automatically gathers the displacement of reinforcing bar and suffered pulling capacity.
Described normal direction loading system includes load plate, the applying of normal pressure and measuring equipment.This normal pressure applies also
Thered is provided by described large-scale triaxial apparatus or large-scale pressure servo machine.
Described pulling capacity reaction frame provides pulling capacity counter-force, by fastening bolt joint test case, it is achieved that proof box
For departing from body.
In other words, the Ribbed Bar of present invention pull-out test device in earth and rockfill dam stockpile, including proof box, hollow
Disk, Ribbed Bar sleeve, normal direction loading system, horizontal pulling capacity application system, pulling capacity reaction frame, pulling capacity and displacement pass
Sensor etc..Described proof box side is drawing end, and two side arranges the symmetrical circular hole passed for Ribbed Bar；Described is hollow
Disk is made by rubber, and parcel reinforcing bar embeds in circular hole, is possible not only to block dropping of filler when circular hole prevents from rolling vibrations, and
And also assume responsibility for effect that is fixing and that keep Ribbed Bar level；Described normal direction loading system includes load plate, normal pressure
Applying and measuring equipment, wherein normal pressure applies and measuring equipment is large-scale triaxial apparatus or large-scale pressure servo machine；Described
Horizontal pulling capacity application system includes motor, speed regulating reducing, thread, and wherein motor provides pulling force, speed regulating reducing control
Drawing speed processed；Described pulling capacity reaction frame provides pulling capacity counter-force, by fastening bolt joint test case, it is achieved that test
Case is for departing from body；The Ribbed Bar of described Ribbed Bar sleeve connection different-diameter and screw thread stayed mast, it is achieved be rigidly connected,
The Ribbed Bar of different-diameter only need to be polished into the silk head of uniform diameters；Described pulling capacity and displacement transducer are connected to band
On rib reinforcement, automatically gather the displacement of reinforcing bar and suffered pulling capacity.
The technical scheme completing second invention task of the application is, above-mentioned Ribbed Bar drawing in earth and rockfill dam stockpile
Pull out the test method of assay device, it is characterised in that step is as follows:
(1). being inserted by stockpile in proof box, vibrations simultaneously roll；
(2). when filling the half to height, Ribbed Bar is passed the circular hole of proof box two side；
(3). hollow disk is installed at the circular hole of proof box two side；
(4). then it is further continued for inserting stockpile, continues vibrations and roll, fill to design height；
(5). the hollow disk in removal proof box both sides；
(6). proof box is attached by fastening bolt with pulling capacity reaction frame；
(7). rotate and connect Ribbed Bar sleeve；
(8). in proof box, place load plate, and connect normal direction loading system；
(9). apply and record normal force；
(10). after normal pressure is stable, pulling capacity and displacement transducer are connected computer by cable；
(11). starting data acquisition software, the decelerator arranging horizontal pulling capacity application system obtains the drawing speed needed；
(12). start motor and apply pulling capacity, the displacement of synchronous recording Ribbed Bar and suffered pulling capacity.
The method have the advantages that
(1) this draw-off gear is simple to manufacture, and certainty of measurement is high, it is convenient to the outside normal direction loading system of docking, proof box is can
Depart from body.
(2) this draw-off gear can control drawing speed, it is achieved the Ribbed Bar of different-diameter connects with the rigidity of thread
Connect, and make it keep level.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this
Some bright embodiments, from the point of view of those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to
Other accompanying drawing is obtained according to these accompanying drawings.
Fig. 1 is the Ribbed Bar of present invention pull-out test apparatus structure schematic diagram in stockpile.Wherein, 1-band rib steel
Muscle, 2-proof box, 3-stockpile, 4-normal direction loading system, 5-load plate, 6-fastening bolt, 7-Ribbed Bar sleeve,
8-pulling capacity and displacement transducer, 9-pulling capacity reaction frame, 10-horizontal pulling capacity application system.
Fig. 2 is the structural representation of proof box.1-Ribbed Bar, 2-proof box, 3-stockpile, the hollow disk of 11-.
Detailed description of the invention
Below in conjunction with accompanying drawing, the detailed description of the invention of patent of the present invention is described, it is clear that being only of the following stated
The preferred embodiments of the present invention, are not limited to the present invention.Art skilled person should be understood that at this
On the basis of the technical scheme of bright patent, those skilled in the art need not pay the various amendments that creative work can be made
Or deformation is still within protection scope of the present invention.
This device is used to carry out Ribbed Bar pull-out test step in stockpile as follows:
The technical scheme completing second invention task of the application is, the drawing examination in earth and rockfill dam stockpile of the above-mentioned Ribbed Bar
The test method of experiment device, it is characterised in that step is as follows:
(1). stockpile 3 is inserted in proof box 2, and vibrations simultaneously roll；
(2). when filling the half to height, Ribbed Bar 1 is passed the circular hole of proof box 2 two side；
(3). hollow disk 11 is installed at the circular hole of proof box 2 two side；
(4). then it is further continued for inserting stockpile 3, continues vibrations and roll, fill to design height；
(5). the hollow disk 11 of removal proof box 2 both sides；
(6). proof box 2 is attached by fastening bolt 6 with pulling capacity reaction frame 9；
(7). rotate and connect Ribbed Bar sleeve 7；
(8). in proof box 2, place load plate 5, and connect normal direction loading system 4；
(9). apply and record normal force；
(10). after normal pressure is stable, pulling capacity and displacement transducer 8 are connected computer by cable；
(11). starting data acquisition software, the decelerator arranging horizontal pulling capacity application system 10 obtains the drawing speed needed；
(12). start motor and apply pulling capacity, the displacement of synchronous recording Ribbed Bar and suffered pulling capacity.
Claims (7)
1. a Ribbed Bar pull-out test device in earth and rockfill dam stockpile, is provided with measuring equipment and horizontal pulling capacity applies
System；This horizontal pulling capacity application system includes motor, speed regulating reducing, thread, and wherein motor provides pulling force, and speed governing subtracts
Speed device controls drawing speed；It is characterized in that, be provided with proof box at measurement direction, described proof box is placed enrockment to be tested
The Ribbed Bar of parcel in material and this stockpile, proof box two side arranges the symmetrical circular hole passed for Ribbed Bar, Qi Zhongyi
Side is drawing end；Described proof box be vertically provided with load plate with horizontal pulling capacity direction, this load plate is provided with normal direction and adds
Loading system；Pulling capacity reaction frame it is provided with between drawing end and the measuring equipment of proof box；This pulling capacity reaction frame and proof box
Connect by fastening bolt is fixing, it is provided that pulling capacity counter-force；Measuring equipment and horizontal pulling capacity application system by pulling capacity and
Displacement transducer and a Ribbed Bar sleeve are connected with Ribbed Bar to be tested.
The Ribbed Bar the most according to claim 1 pull-out test device in earth and rockfill dam stockpile, it is characterised in that
Being provided with hollow disk in the symmetrical circular hole of described proof box two side, this hollow disk is made by rubber.
The Ribbed Bar the most according to claim 1 pull-out test device in earth and rockfill dam stockpile, it is characterised in that institute
State normal direction loading system and include load plate, the applying of normal pressure and measuring equipment.
The Ribbed Bar the most according to claim 3 pull-out test device in earth and rockfill dam stockpile, it is characterised in that institute
State the normal pressure in normal direction loading system to apply to be provided by described large-scale triaxial apparatus or large-scale pressure servo machine.
The Ribbed Bar the most according to claim 1 pull-out test device in earth and rockfill dam stockpile, it is characterised in that institute
The Ribbed Bar sleeve one end stated is provided with screw thread, to connect Ribbed Bar and the screw thread stayed mast of different-diameter, it is achieved rigidity is even
Connect.
6. according to the pull-out test device in earth and rockfill dam stockpile of the Ribbed Bar one of claim 1-5 Suo Shu, its feature
Being, described pulling capacity and displacement transducer are connected in Ribbed Bar, automatically gather the displacement of reinforcing bar and suffered drawing
Power.
7. the test method of the pull-out test device in earth and rockfill dam stockpile of the Ribbed Bar described in claim 1, its feature
Being, step is as follows:
(1). being inserted by stockpile in proof box, vibrations simultaneously roll；
(2). when filling the half to height, Ribbed Bar is passed the circular hole of proof box two side；
(3). hollow disk is installed at the circular hole of proof box two side；
(4). then it is further continued for inserting stockpile, continues vibrations and roll, fill to design height；
(5). the hollow disk in removal proof box both sides；
(6). proof box is attached by fastening bolt with pulling capacity reaction frame；
(7). rotate and connect Ribbed Bar sleeve；
(8). in proof box, place load plate, and connect normal direction loading system；
(9). apply and record normal force；
(10). after normal pressure is stable, pulling capacity and displacement transducer are connected computer by cable；
(11). starting data acquisition software, the decelerator arranging horizontal pulling capacity application system obtains the drawing speed needed；
(12). start motor and apply pulling capacity, the displacement of synchronous recording Ribbed Bar and suffered pulling capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610705749.5A CN106323868A (en) | 2016-08-22 | 2016-08-22 | Pullout test device of ribbed bar in earth-rock dam rockfill material and test method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610705749.5A CN106323868A (en) | 2016-08-22 | 2016-08-22 | Pullout test device of ribbed bar in earth-rock dam rockfill material and test method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106323868A true CN106323868A (en) | 2017-01-11 |
Family
ID=57741947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610705749.5A Pending CN106323868A (en) | 2016-08-22 | 2016-08-22 | Pullout test device of ribbed bar in earth-rock dam rockfill material and test method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106323868A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107091803A (en) * | 2017-06-02 | 2017-08-25 | 中国航发南方工业有限公司 | Leaf decomposition device |
| CN109520838A (en) * | 2018-12-25 | 2019-03-26 | 西南交通大学 | A kind of shield tunnel screwed joint tensile property experimental rig |
| CN109975204A (en) * | 2019-05-08 | 2019-07-05 | 中交隧道工程局有限公司 | A kind of high mountain artificial snow-making pipeline testing device for friction coefficient and its method |
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| US3301039A (en) * | 1964-01-06 | 1967-01-31 | Univ Pennsylvania | Slid resistance drag tester |
| CN1773241A (en) * | 2004-11-11 | 2006-05-17 | 香港理工大学 | Testing box for measuring anti-pulling force of soil nailing mechanical property |
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| CN202928938U (en) * | 2012-12-04 | 2013-05-08 | 中建五局土木工程有限公司 | Pull-out test device for detecting friction characteristics of building reinforcement interface |
| CN103645094A (en) * | 2013-12-17 | 2014-03-19 | 中国水电顾问集团华东勘测设计研究院有限公司 | Testing device for real mechanical properties of interface and testing method of testing device |
| CN103759957A (en) * | 2013-12-25 | 2014-04-30 | 广西科技大学 | Geogrid pull-out test device |
| CN104198276A (en) * | 2014-08-25 | 2014-12-10 | 广西科技大学 | Large visual drawing test device for geosynthetics |
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB653085A (en) * | 1948-05-11 | 1951-05-09 | Dunlop Rubber Co | Device for measuring the resistance to slip of a pulley and a driving belt |
| US3301039A (en) * | 1964-01-06 | 1967-01-31 | Univ Pennsylvania | Slid resistance drag tester |
| CN1773241A (en) * | 2004-11-11 | 2006-05-17 | 香港理工大学 | Testing box for measuring anti-pulling force of soil nailing mechanical property |
| CN201040290Y (en) * | 2007-04-23 | 2008-03-26 | 天津商学院 | Vibration drawing system for accurate seamless steel pipe |
| CN202928938U (en) * | 2012-12-04 | 2013-05-08 | 中建五局土木工程有限公司 | Pull-out test device for detecting friction characteristics of building reinforcement interface |
| CN103645094A (en) * | 2013-12-17 | 2014-03-19 | 中国水电顾问集团华东勘测设计研究院有限公司 | Testing device for real mechanical properties of interface and testing method of testing device |
| CN103759957A (en) * | 2013-12-25 | 2014-04-30 | 广西科技大学 | Geogrid pull-out test device |
| CN104198276A (en) * | 2014-08-25 | 2014-12-10 | 广西科技大学 | Large visual drawing test device for geosynthetics |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107091803A (en) * | 2017-06-02 | 2017-08-25 | 中国航发南方工业有限公司 | Leaf decomposition device |
| CN107091803B (en) * | 2017-06-02 | 2019-11-12 | 中国航发南方工业有限公司 | Leaf decomposition device |
| CN109520838A (en) * | 2018-12-25 | 2019-03-26 | 西南交通大学 | A kind of shield tunnel screwed joint tensile property experimental rig |
| CN109520838B (en) * | 2018-12-25 | 2023-12-15 | 西南交通大学 | Tensile property test device for shield tunnel bolt joint |
| CN109975204A (en) * | 2019-05-08 | 2019-07-05 | 中交隧道工程局有限公司 | A kind of high mountain artificial snow-making pipeline testing device for friction coefficient and its method |
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Application publication date: 20170111 |
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