Large-sized multifunctional geosynthetic material interface power direct shear apparatus
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A geosynthetic, multi-functional technology, applied in the direction of testing the strength of materials by applying a stable shear force, which can solve problems such as difficulty in research
Active Publication Date: 2014-09-10
TONGJI UNIV
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Problems solved by technology
Due to the lack of a direct shear device that can realize complex random vibration input, research in this area is difficult, and it is urgent to develop a geotechnical material interface dynamic direct shear device that can realize complex random vibration input
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Embodiment 1
[0029] Such as Figure 1-Figure 7As shown, the device consists of the instrument base 1, the rear fixing bracket of the vibration exciter 2, the front fixing bracket of the vibration exciter 3, the longitudinal suspension beam 4, the horizontal suspension beam 5, the vibration exciter suspension fixing rod 6, and the vibration exciter fixing support 7 , Exciter cylinder 8, exciter dowel 9, connecting bayonet device 10, vertical press cylinder 11, fixed support top plate 12, vertical press dowel 13, vertical support column 14, loading plate 15. Consisting of lateral limit fixed frame 16, test soil sample 17, test geosynthetic material 18, dynamic extraction plate 19, steel rolling bar group 20, horizontal base 21, second layer test geosynthetic material 22, and vibration exciter Servo system 23, oil pressure delivery control system 24, computer adjustment control system 25. Among them, the instrument base 1 serves as the bottom fixing system of the whole multifunctional test p...
Embodiment 2
[0035] The device described in Example 1 is used to test the double geosynthetic interface direct shear test mode, and its working process is as follows: a test geosynthetic material 18 with a size of 1250 mm × 350 mm is attached to the upper surface of the dynamic extraction plate 19, and the A test geosynthetic material with a size of 1050mm×350mm is attached to the lower surface of the pressure loading plate 15, and the computer numerical control system 31 and the oil pressure control system 30 are controlled to make the geosynthetic material 22 on the lower surface of the pressure loading plate 15 and the dynamic extraction plate 19 The geosynthetic material 18 on the surface contacts to form a shear plane, and the applied normal pressure continues to increase until it reaches the experimental set value. The extraction plate 19 and the exciter dowel 9 are firmly connected with bolts through the steel dowel fixing device 10, the computer numerical control system 25 and the o...
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Abstract
The invention belongs to the technical field of geotechnical engineering, and particularly relates to a large-sized multifunctional geosynthetic material interface power direct shear apparatus which comprises a base, front and rear fixed support frames, horizontal and longitudinal hanging beams, a hanging rod, a vibration exciter ( an oil cylinder, a supporting seat, a dowel bar and a bayonet), a vertical pressure gage, a top plate, a support column, a loading plate, a lateral confining frame, a tested soil sample, a geosynthetic material, a withdrawing plate, a steel binding group, a horizontal base, a servo system, an oil hydraulic system and a computer control system, wherein the vibration exciter is fixed by the front and rear fixed support frames and the hanging beam; a frame is formed through the top plate, and the vertical pressure gage and the loading plate are fixed by the support column and the horizontal base; a shear box is formed through other parts. According to the large-sized multifunctional geosynthetic material interface power direct shear apparatus, the vibration of the vibration exciter and the withdrawing plate is controlled through the computer control system and the oil hydraulic system, and the stress strain index is monitored through the servo system. The large-sized multifunctional geosynthetic material interface power direct shear apparatus disclosed by the invention can be used for measuring the power shearing characteristic of a geosynthetic material interface under the action of any vibration waveform and can realize other test purposes by measuring multiple interfaces by replacing parts.
Description
technical field [0001] The invention belongs to the technical field of geotechnical engineering, and in particular relates to a large-scale multifunctional geotechnical synthetic material interface dynamic direct shear instrument, which can realize various geotechnical material interface dynamic direct shear tests. Background technique [0002] Geosynthetics are industrial products made of synthetic polymers (such as plastics, chemical fibers, synthetic rubber, etc.) Synthetic materials, geotechnical special materials and geocomposites, geonets, fiberglass mesh, geomats and other types. Geosynthetics are widely used as a liner system at the bottom of foundations of landfills and low buildings to isolate pollutants from leaking. When earthquake disasters occur, geosynthetics composite liner systems will play a complex role. the shock isolation effect. However, the shear strength of geosynthetics is generally low, and complex relative motions will occur along the interface o...
Claims
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