CN103575644A - Test method for matching friction coefficient of contact surface of poured concrete - Google Patents
Test method for matching friction coefficient of contact surface of poured concrete Download PDFInfo
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- CN103575644A CN103575644A CN201310545477.3A CN201310545477A CN103575644A CN 103575644 A CN103575644 A CN 103575644A CN 201310545477 A CN201310545477 A CN 201310545477A CN 103575644 A CN103575644 A CN 103575644A
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Abstract
A test method for matching the friction coefficient of a contact surface of poured concrete is characterized in that the actual state of a concrete pouring engineering is simulated, a poured concrete test block is adopted for cooperation, and an actuator is utilized for applying a positive pressure to the contact surface as well as a sliding horizontal jacking force to the test block, so that the test result is accurate, the operation is convenient and rapid, the value of test data is high, and the test method is suitable for the research in the fields of design of building beam column joints, segment precast beams, immersed tube segment joints and the like.
Description
Technical field
The present invention relates to concrete works structural test technical field, refer to particularly a kind of coupling casting concrete surface of contact test method of friction coefficient.
Background technology
In the prefabricated subsection beam seam shear Design and immersed tube joint shear Design in covil construction field beam-column joint shear Design, science of bridge building field, usually need to consider the friction force of concrete surface, and the calculating of friction force needs this important parameter of friction factor.In related specifications, concrete and concrete friction factor have been had both at home and abroad relatedly, but affected by the many-sides such as environment, stress and concrete material characteristic, in Practical Project, needed method by experiment to obtain and verify.
In existing construction material friction coefficient testing method, pay close attention to the impact of material behavior on friction factor itself, test specimen is approved product (as rubber support) or the sample of material selected at random more, and test method is relatively simple.In the existing method of testing for concrete material friction factor, all do not consider specially that test specimen surface of contact forming process mate the impact of casting craft on friction factor yet.How farthest to reduce the impact of process of the test on test data, realize the PVvalue testing of coupling casting concrete surface of contact under high-stress state, there is no at present better test method.
Summary of the invention
Object of the present invention is exactly the deficiency that will solve above-mentioned background technology, provides a kind of test accurate, the coupling casting concrete surface of contact test method of friction coefficient of simple operation.
Technical scheme of the present invention is: a kind of coupling casting concrete surface of contact test method of friction coefficient, it is characterized in that, and it comprises the following steps:
1), build lower floor's test block and upper strata test block, between lower floor's test block and upper strata test block, be reserved with the space of building of middle level test block;
2) to reach requirement Hou， lower floor's test block and upper strata test block demoulding ，Yi lower floor's test block and upper strata test block be side form to the concrete strength of the test block of ,Dai lower floor and upper strata test block, builds middle level test block;
3), the concrete strength until middle level test block reaches after requirement, lower floor's test block, middle level test block and upper strata test block are vertically placed, it is static that lower floor's test block and upper strata test block keep, and to upper strata test block, applies normal pressure, applies horizontal-top thrust middle level test block is slided to middle level test block;
4), utilize normal pressure and horizontal-top thrust can obtain the surface of contact friction factor of upper strata test block, lower floor's test block and middle level test block.
In such scheme:
Described upper strata test block end face is provided with backing plate, and described backing plate is provided with vertical actuator.
Described horizontal-top thrust applies by being arranged on the horizontal actuator of middle level test block one side.
The side that the test block of described lower floor is fixedly installed on counter-force pedestal Shang， lower floor's test block and upper strata test block is provided with horizontal thrust baffle, and described horizontal thrust baffle is arranged on counter-force pedestal, and horizontal thrust baffle and horizontal actuator lay respectively at test block both sides, middle level.
Between described horizontal thrust baffle and lower floor's test block, upper strata test block, be provided with block.
Between the test block of described upper strata and middle level test block and between middle level test block and lower floor's test block, be provided with clock gauge.
The present invention utilizes double shear cutting method principle, 3 concrete test blocks that coupling is built overlay on counter-force pedestal, by vertical actuator, apply normal pressure, by horizontal actuator, apply horizontal-top thrust it is slided, recycling normal pressure and horizontal-top thrust can calculate test block surface of contact friction factor.
Test result of the present invention is accurate, it is convenient that operation is implemented, can simulating test pieces surface of contact forming process mate the impact of casting craft on friction factor, reduce the impact of process of the test on test data, realize the PVvalue testing of coupling casting concrete surface of contact under high-stress state.
Accompanying drawing explanation
Fig. 1 builds lower floor's test block, upper strata test block schematic diagram;
The test block of Tu2Shi lower floor, upper strata test block demoulding schematic diagram;
Fig. 3 builds middle level test block schematic diagram;
Fig. 4 is that rear schematic diagram has been built in middle level test block;
Constitutional diagram when the surface of contact friction factor between the test block of Tu5Shi Dui lower floor, upper strata test block and middle level module is tested;
Fig. 6 is the schematic side view of Fig. 5.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
A casting concrete surface of contact test method of friction coefficient, it comprises the following steps:
1), as shown in Figure 1, build lower floor's test block 1 and upper strata test block 3, between lower floor's test block 1 and upper strata test block 3, be reserved with the space of building of middle level test block 2;
2), as shown in Figure 2, Figure 3 and Figure 4 shown in the concrete strength of ，Dai lower floor test block 1 and upper strata test block 3 reach the test block 1 of requirement Hou，Yi lower floor and upper strata test block 3 is side form, and be equipped with suitable end mould, build middle level test block 2;
3), the concrete strength until middle level test block 2 reaches after requirement, lower floor's test block 1, middle level test block 2 and upper strata test block 3 are vertically placed, lower floor's test block 1 and upper strata test block 3 demouldings, lower floor's test block 1 and upper strata test block 3 keep static, to upper strata test block 3, apply normal pressure, to middle level test block 2, apply horizontal-top thrust middle level test block 2 is slided;
4), utilize normal pressure and horizontal-top thrust can obtain the surface of contact friction factor of upper strata test block 3, lower floor's test block 1 and middle level test block 2.
In this scheme:
As shown in Figure 5, Figure 6:
Horizontal-top thrust applies by being arranged on the horizontal actuator 6 of middle level test block 2 one sides.
Lower floor's test block 1 is fixedly installed on counter-force pedestal 4, one side of lower floor's test block 1 and upper strata test block 3 is provided with horizontal thrust baffle 5, horizontal thrust baffle 5 is for stoping lower floor's test block 1 and upper strata test block 3 water to move flat, horizontal thrust baffle 5 is arranged on counter-force pedestal 4, and horizontal thrust baffle 5 lays respectively at middle level test block 2 both sides with horizontal actuator 6.
Between horizontal thrust baffle 5 and lower floor's test block 1, upper strata test block 3, be provided with block 9, and non-filler between middle level test block 2, this is to provide reserved passageway for moving horizontally of middle level test block 2.
Between upper strata test block 1 and middle level test block 2 and between middle level test block 2 and lower floor's test block 3, be provided with clock gauge 10, for testing the displacement of surface of contact relative sliding.
In process of the test, keep vertical pressure constant, recording level jacking force and the displacement of surface of contact relative sliding, can obtain the surface of contact friction factor of upper strata test block 3, lower floor's test block 1 and middle level test block 2.
The present invention is by the actual concreting engineering state of simulation, coupling casting concrete test block, do not change its build and the prerequisite of duty under, by actuator, apply the slip horizontal-top thrust of contact surface positive pressure and test block, test result is accurate, simple operation, test figure is worth high, applicable to area researches such as building beam column joint, precast segment beam and immersed tube sections joint design.
Claims (6)
1. a coupling casting concrete surface of contact test method of friction coefficient, is characterized in that, it comprises the following steps:
1), build lower floor's test block (1) and upper strata test block (3), between lower floor's test block (1) and upper strata test block (3), be reserved with the space of building of middle level test block (2);
2) concrete strength of ,Dai lower floor test block (1) and upper strata test block (3) reaches requirement Hou， lower floor test block (1) and upper strata test block (3) demoulding ，Yi lower floor's test block (1) and upper strata test block (3) for side form, builds middle level test block (2);
3), the concrete strength until middle level test block (2) reaches after requirement, lower floor's test block (1), middle level test block (2) and upper strata test block (3) are vertically placed, lower floor's test block (1) and upper strata test block (3) keep static, to upper strata test block (3), apply normal pressure, to middle level test block (2), apply horizontal-top thrust middle level test block (2) is slided;
4), utilize normal pressure and horizontal-top thrust can obtain the surface of contact friction factor of upper strata test block (3), lower floor's test block (1) and middle level test block (2).
2. coupling casting concrete surface of contact test method of friction coefficient according to claim 1, is characterized in that: described upper strata test block (3) end face is provided with backing plate (8), and described backing plate (8) is provided with vertical actuator (7).
3. coupling casting concrete surface of contact test method of friction coefficient according to claim 1, is characterized in that: described horizontal-top thrust applies by being arranged on the horizontal actuator (6) of middle level test block (2) one sides.
4. coupling casting concrete surface of contact test method of friction coefficient according to claim 3, it is characterized in that: described lower floor test block (1) is fixedly installed on counter-force pedestal (4), one side of lower floor's test block (1) and upper strata test block (3) is provided with horizontal thrust baffle (5), it is upper that described horizontal thrust baffle (5) is arranged on counter-force pedestal (4), and horizontal thrust baffle (5) lays respectively at middle level test block (2) both sides with horizontal actuator (6).
5. coupling casting concrete surface of contact test method of friction coefficient according to claim 4, is characterized in that: between described horizontal thrust baffle (5) and lower floor's test block (1), upper strata test block (3), be provided with block (9).
6. coupling casting concrete surface of contact test method of friction coefficient according to claim 1, is characterized in that: between described upper strata test block (1) and middle level test block (2) and between middle level test block (2) and lower floor's test block (3), be provided with clock gauge (10).
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108132212A (en) * | 2018-03-07 | 2018-06-08 | 长安大学 | A kind of device and assay method for measuring loess-concrete surface friction coefficient |
| CN108195752A (en) * | 2018-01-03 | 2018-06-22 | 苏州智吉兴敏电子科技有限公司 | The experimental provision and method of adhesive strength and friction coefficient between a kind of measurement construction material |
| CN108982250A (en) * | 2018-08-10 | 2018-12-11 | 重庆大学 | A kind of device and test method for simulating jacking pipe joints and rock matter country rock shearing friction |
| CN109030345A (en) * | 2018-07-13 | 2018-12-18 | 中国葛洲坝集团国际工程有限公司 | A kind of face-plate of rockfill dam base surface restraint stress detection method |
| CN110146441A (en) * | 2019-06-14 | 2019-08-20 | 辽宁工程技术大学 | For measuring the experimental rig of the dynamic friction coefficient of concrete structure and the soil body |
| CN110231284A (en) * | 2019-07-16 | 2019-09-13 | 上海宝冶集团南京建筑有限公司 | A kind of rigidity friction coefficient measuring apparatus |
| CN110567871A (en) * | 2019-07-23 | 2019-12-13 | 西南交通大学 | Friction experiment device, bearing mechanism, loading mechanism and friction experiment method thereof |
| CN112683775A (en) * | 2020-11-18 | 2021-04-20 | 中交公路规划设计院有限公司 | Steel shell concrete immersed tube tunnel push-out type final joint sliding track friction force testing system |
| CN114112897A (en) * | 2021-12-08 | 2022-03-01 | 中铁二院昆明勘察设计研究院有限责任公司 | Device and method for measuring pipe soil friction coefficient |
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| CN2620270Y (en) * | 2003-04-24 | 2004-06-09 | 胡长顺 | Shear strength measurer for use between road surface structure layers |
| CN101215818A (en) * | 2008-01-08 | 2008-07-09 | 武汉理工大学 | Special-purpose waterproof bonding layer for drainage asphalt pavement and design method thereof |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108195752A (en) * | 2018-01-03 | 2018-06-22 | 苏州智吉兴敏电子科技有限公司 | The experimental provision and method of adhesive strength and friction coefficient between a kind of measurement construction material |
| CN108132212A (en) * | 2018-03-07 | 2018-06-08 | 长安大学 | A kind of device and assay method for measuring loess-concrete surface friction coefficient |
| CN109030345A (en) * | 2018-07-13 | 2018-12-18 | 中国葛洲坝集团国际工程有限公司 | A kind of face-plate of rockfill dam base surface restraint stress detection method |
| CN108982250B (en) * | 2018-08-10 | 2020-11-13 | 重庆大学 | Device for simulating shearing friction between pipe joints of jacking pipes and rock surrounding rocks and test method |
| CN108982250A (en) * | 2018-08-10 | 2018-12-11 | 重庆大学 | A kind of device and test method for simulating jacking pipe joints and rock matter country rock shearing friction |
| CN110146441B (en) * | 2019-06-14 | 2021-07-27 | 辽宁工程技术大学 | Test device for measuring dynamic friction coefficient of concrete structure and soil body |
| CN110146441A (en) * | 2019-06-14 | 2019-08-20 | 辽宁工程技术大学 | For measuring the experimental rig of the dynamic friction coefficient of concrete structure and the soil body |
| CN110231284A (en) * | 2019-07-16 | 2019-09-13 | 上海宝冶集团南京建筑有限公司 | A kind of rigidity friction coefficient measuring apparatus |
| CN110231284B (en) * | 2019-07-16 | 2024-01-30 | 上海宝冶集团南京建筑有限公司 | Rigidity friction coefficient measuring device |
| CN110567871A (en) * | 2019-07-23 | 2019-12-13 | 西南交通大学 | Friction experiment device, bearing mechanism, loading mechanism and friction experiment method thereof |
| CN110567871B (en) * | 2019-07-23 | 2021-07-30 | 西南交通大学 | Friction experiment device, bearing mechanism, loading mechanism and friction experiment method thereof |
| CN112683775A (en) * | 2020-11-18 | 2021-04-20 | 中交公路规划设计院有限公司 | Steel shell concrete immersed tube tunnel push-out type final joint sliding track friction force testing system |
| CN114112897A (en) * | 2021-12-08 | 2022-03-01 | 中铁二院昆明勘察设计研究院有限责任公司 | Device and method for measuring pipe soil friction coefficient |
| CN114112897B (en) * | 2021-12-08 | 2023-12-01 | 中铁二院昆明勘察设计研究院有限责任公司 | Device and method for measuring friction coefficient of pipe soil |
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| CN103575644B (en) | 2016-04-27 |
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Inventor after: Zhang Yongtao Inventor after: Chen Fuqiang Inventor after: Zhai Shihong Inventor after: Tian Wei Inventor after: Liu Zhanguo Inventor after: Yang Yanhua Inventor after: Zhou Renzhong Inventor after: You Xinpeng Inventor after: Xiang Liang Inventor before: Chen Fuqiang Inventor before: Zhai Shihong Inventor before: Zhang Yongtao Inventor before: Tian Wei Inventor before: Liu Zhanguo Inventor before: Yang Yanhua Inventor before: Zhou Renzhong Inventor before: You Xinpeng Inventor before: Xiang Liang |