CN102914475B - Shear test device for observing mechanical property of interface between underwater soil and structure - Google Patents

Shear test device for observing mechanical property of interface between underwater soil and structure Download PDF

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Publication number
CN102914475B
CN102914475B CN201210395596.0A CN201210395596A CN102914475B CN 102914475 B CN102914475 B CN 102914475B CN 201210395596 A CN201210395596 A CN 201210395596A CN 102914475 B CN102914475 B CN 102914475B
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China
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test
soil
horizontal
interface
earth
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CN201210395596.0A
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CN102914475A (en
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常虹
夏军武
向小芳
唐晓祥
郑培波
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China University of Mining and Technology CUMT
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China University of Mining and Technology CUMT
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Abstract

The invention relates to a mechanical property test device, in particular to a test device for observing the mechanical property of an interface between underwater soil and a structure, which is especially suitable for researching the mechanical property of the interface between the underwater soil and the structure in a hydraulic building (structure). The test device comprises a fixing mechanism, a horizontal movement mechanism, a soil box and a loading system, and an electro-hydraulic servo movable and static universal testing machine is used as a main machine frame. A designed soil material is loaded in the soil box fixed on the horizontal movement mechanism. A structure test block is arranged on an upper chuck of the electro-hydraulic servo movable and static universal testing machine, a normal stress is applied through the vertical loading system, and the shear mechanical behavior of the interface between the underwater soil and the structure under normal stress and complex stress paths can be represented through the horizontal loading system. The normal force and the shear force in the interfere shear test are measured through a load sensor, a vertical displacement meter arranged on the top surface of the structure test sample is used for measuring the normal displacement of the interface in the test, and horizontal displacement meters arranged on two sides of the soil box are used for measuring the shear displacement in the test.

Description

The shearing test device of soil and structural interface mechanical characteristic under a kind of observation water
Technical field
The present invention relates to a kind of dynamic characteristic test equipment, to be particularly useful for studying in water conservancy project buildings or structures soil and the shearing test device of soil under a kind of observation water of the interface mechanics characteristic of structure with structural interface mechanical characteristic under water.
Background technology
Research at present to Structure control problem, mainly by soil-structure interface basic mechanical performance under the technique study corresponding conditions of physical test, the basis of test is set up the constitutive model describing interface mechanics characteristic or corresponding improvement is carried out to existing model.Therefore adopted test apparatus is just most important.The test apparatus of domestic and international many scholars to soil-structure interface performance is studied, and the instrument of current widespread use comprises direct shear apparatus, the large class of simple shear apparatus two.Of a great variety due to soil, physical property complexity is various, and therefore the research of Soil-structure interaction model also has very strong specific aim.If the people such as a loud, high-pitched sound are in " Geotechnical Engineering journal " in March, 2003, the 25th volume, the 2nd phase, " large-scale soil and structure interface circular loading shear apparatus " on P149-153 studies the mechanical property of coarse-grained soil and structural interface.The people such as Zhou Guoqing in " China Mining University's journal " March calendar year 2001, the 30th volume, the 2nd phase, the mechanical characteristic of the residual scissor test systematic study deep soil-structure interface of the superelevation straightening on P118-121.For hydro-structure, its soil is with under structural interface is in immersion condition all the time, and current test apparatus is difficult to the actual mechanical behavior of soil and structural interface under simulative immersion condition.Conventional interface shearing instrument specimen size is less, and cannot realize the interface mechanics response under complicated stress environment.These defects all limit the research of soil and hydro-structure interface mechanics characteristic.
Summary of the invention
The object of the invention is for overcoming above-mentioned the deficiencies in the prior art part, the shearing test device of soil and structural interface mechanical characteristic under a kind of observation water is provided.This test unit, forms primarily of fixed mechanism, horizontal mobile mechanism, earth material box, loading system and measuring system as main machine frame by means of electro-hydraulic servo static/dynamic universal testing machine.The earth material designed is loaded in the earth material box be fixed on horizontal mobile mechanism, by the upper grip of structure test block installation at electro-hydraulic servo static/dynamic universal testing machine, apply normal stress by vertical loading system, the shearing mechanical behavior of soil and structural interface under water under normal normal stress and complicated stress environment can be reproduced by horizontal addload system.In interface shearing test, normal force and shearing force are recorded by load transducer, and the Normal Displacement of the vertical displacement measurement amount test median surface that structure sample end face is arranged, the horizontal displacement meter being arranged in earth material box both sides measures the shear displacemant in testing.
The present invention realizes with following technical scheme: the shearing test device of soil and structural interface mechanical characteristic under a kind of observation water, this shearing test device comprises fixed mechanism, horizontal mobile mechanism, earth material box, loading system, it is characterized in that: whole test unit by means of electro-hydraulic servo static/dynamic universal testing machine as main machine frame; By bolt, connection joist steel is fixed on the base of testing machine, described connection joist steel has support baseboard, support baseboard is welded with guide rail; By roller with move horizontally the horizontal mobile mechanism that base plate forms and be placed on guide rail; Described move horizontally earth material box base plate is bolted by comprising angle steel outside framework and plexiglass box and forming; Structure test block is fixed on the upper grip of electro-hydraulic servo static/dynamic universal testing machine by connecting elements; Horizontal actuator is fixed on support baseboard by support, by horizontal load sensor with move horizontally base plate and link together; Horizontal displacement sensors, vertical displacement sensor, horizontal load sensor and PWS series electro-hydraulic servo static/dynamic universal testing machine is connected with data acquisition system (DAS) respectively.
The described earth material box moving horizontally base plate, angle steel outside framework and plexiglass box composition is all equipped with horizontal displacement sensors.
Described structure test block is equipped with vertical displacement sensor.
Earth material is had in the earth material box of described angle steel outside framework and plexiglass box composition.
Advantage of the present invention is: this test unit, and all to be connected by high-strength bolt between parts as main machine frame by means of electro-hydraulic servo static/dynamic universal testing machine, and be convenient to installation and removal, the cost setting up this pilot system is very low.Device can soil and the actual mechanical behavior of structural interface under Simulated Water, and also can realize the function that other shear instruments, its cost is more much lower than conventional shearing instrument simultaneously.The size of the structure sample of device is maximum can reach 400 × 400mm, the structure sample of different size can be made easily, to study the impact of specimen size on interface mechanical characteristic, the mechanical property at the interface under normal normal stress can also be studied, to realize the mechanical behavior at interface under complicated stress environment.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is described in further detail:
Fig. 1 is structural representation of the present invention;
Fig. 2 is the side view of Fig. 1;
In figure: 1, connect joist steel, 2, support baseboard, 3, guide rail, 4, roller, 5, move horizontally base plate, 6, horizontal displacement sensors, 7, angle steel outside framework, 8, plexiglass box, 9, structure test block, 10, vertical displacement sensor, 11, electro-hydraulic servo static/dynamic universal testing machine, 12, connecting elements, 13, earth material, 14, horizontal load sensor, 15, horizontal actuator.16, support.
Embodiment
As shown in the figure: the shearing test device of soil and structural interface mechanical characteristic under a kind of observation water, this shearing test device comprises fixed mechanism, horizontal mobile mechanism, earth material box, loading system, whole test unit by means of electro-hydraulic servo static/dynamic universal testing machine 11 as main machine frame; By bolt, connection joist steel 1 is fixed on the base of testing machine, described connection joist steel has support baseboard 2, support baseboard is welded with guide rail 3; By roller 4 with move horizontally the horizontal mobile mechanism that base plate 5 forms and be placed on guide rail 3; Described move horizontally earth material box base plate is bolted by comprising angle steel outside framework 7 and plexiglass box 8 and forming; Structure test block 9 is fixed on the upper grip of electro-hydraulic servo static/dynamic universal testing machine by connecting elements 12; Horizontal actuator 15 is fixed on support baseboard 2 by support 16, by horizontal load sensor 14 with move horizontally base plate 5 and link together; Horizontal displacement sensors 6, vertical displacement sensor 10, horizontal load sensor 14 and PWS series electro-hydraulic servo static/dynamic universal testing machine 11 is connected with data acquisition system (DAS) respectively.
The described earth material box moving horizontally base plate 5, angle steel outside framework 7 and plexiglass box 8 composition is all equipped with horizontal displacement sensors 6.
Described structure test block 9 is equipped with vertical displacement sensor 10.
Earth material 13 is had in the earth material box that described angle steel outside framework 7 and plexiglass box 8 form.
The course of work: load soil sample in earth material box, be compacted to design packing, structure test block 9 is fixed on the upper grip of electro-hydraulic servo static/dynamic universal testing machine by connecting elements 12, start electro-hydraulic servo static/dynamic universal testing machine control upper grip to move down, structure test block 9 is contacted, the interface of the dipped soil of water filling and structure test block 9 in earth material box with soil sample.After applying interface normal stress by electro-hydraulic servo static/dynamic universal testing machine, horizontally moving device does tangential movement on guides 3 under the driving of horizontal actuator 15, drives the movement of earth material box to realize the relative tangential movement of soil and structure sample.The interface mechanics behavior under complicated stress environment can be realized by control electro-hydraulic servo static/dynamic universal testing machine upper grip and horizontal actuator 15.Relative displacement and the stress of the tangential and normal direction at interface are recorded by corresponding displacement and load transducer, pass on computing machine, can be observed the distortion situation of soil and structural interface under water by organic glass by data collecting instrument by relevant data.

Claims (3)

1. soil and the shearing test device of structural interface mechanical characteristic under an observation water; This shearing test device comprises fixed mechanism, horizontal mobile mechanism, earth material box and loading system, it is characterized in that: whole test unit by means of electro-hydraulic servo static/dynamic universal testing machine (11) as main machine frame; To connect by bolt the base that joist steel (1) is fixed on testing machine, described connection joist steel have support baseboard (2), support baseboard be welded with guide rail (3); By roller (4) with move horizontally the horizontal mobile mechanism that base plate (5) forms and be positioned on guide rail (3); Described moves horizontally earth material box base plate (5) being bolted and being made up of angle steel outside framework (7) and plexiglass box (8); Have earth material (13) in earth material box, its area is greater than the area of structure test block, and is immersed in water by earth material (13) and the interface of structure test block (9), ensures that soil sample is in state of saturation all the time; Structure test block (9) is fixed on the upper grip of electro-hydraulic servo static/dynamic universal testing machine by connecting elements (12); Horizontal actuator (15) is fixed on support baseboard (2) by support (16), by horizontal load sensor (14) with move horizontally base plate (5) and link together; Horizontal displacement sensors (6), vertical displacement sensor (10), horizontal load sensor (14) and electro-hydraulic servo static/dynamic universal testing machine (11) are connected with data acquisition system (DAS) respectively.
2. soil and the shearing test device of structural interface mechanical characteristic under observation water according to claim 1, is characterized in that: described earth material box is provided with horizontal displacement sensors (6).
3. soil and the shearing test device of structural interface mechanical characteristic under observation water according to claim 1, is characterized in that: described structure test block (9) is equipped with vertical displacement sensor (10).
CN201210395596.0A 2012-10-17 2012-10-17 Shear test device for observing mechanical property of interface between underwater soil and structure Expired - Fee Related CN102914475B (en)

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CN105181493B (en) * 2015-10-09 2018-10-02 南京理工大学 Steel and concrete interface fatigue experimental device
CN105510153B (en) * 2015-11-26 2018-01-23 中国矿业大学 A kind of large-scale soil body interface shearing test model and test method
KR101658895B1 (en) * 2016-03-28 2016-09-22 한국해양과학기술원 Apparatus and Method for Track Model Test for Evaluating Tractive Performance of Off-road Tracked Vehicle
CN108037028B (en) * 2018-02-05 2020-06-30 东南大学 Method and device for testing shearing resistance and fatigue of pavement interface under vehicle braking condition
CN108489827A (en) * 2018-04-08 2018-09-04 中国矿业大学 A kind of intelligence strain controlling formula geotechnique direct shear apparatus and data acquisition analysis method
CN111024519B (en) * 2019-12-20 2021-07-02 河海大学 Visual interface ring shear apparatus for interaction of underwater structure and soil body and use method
CN111089781B (en) * 2020-01-16 2021-04-30 中国科学院武汉岩土力学研究所 Rock shear test equipment and direct shear test method for rock test block

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