A kind of seepage deformation tester
Technical field
The present invention relates to a kind of field rock soil mass seepage deformation parameter test devices such as Hydraulic and Hydro-Power Engineering, civil engineering work that are used for, the seepage deformation tester of especially testing to the rock soil mass seepage deformation characterisitic parameter in the yield of deep-buried cavities environment.
Background technology
Existing rock soil mass seepage deformation test apparatus generally designs to ground seepage deformation characteristic test under the low situation of ambient stress; Its weak point is that the test result of seepage deformation can not reflect the influence to the seepage deformation characteristic of the stress that acts on the rock soil mass, can not reasonably determine rock soil mass and ooze the required indexs such as critical hydraulic gradient of control engineering design.
Summary of the invention
The technical matters that the present invention will solve is; Can not reasonably determine rock soil mass to existing ground seepage deformation appearance and ooze required indexs such as the critical hydraulic gradient deficiency of control engineering design, a kind of seepage deformation tester that can measure STRESS VARIATION to the influence of seepage deformation test parameter is provided.
Solution of the present invention is; A kind of seepage deformation tester comprises cylindrical shell and the base plate that is located at this cylindrical shell lower end, and this cylindrical shell bottom links to each other with water tank through supply channel; Its design feature is; The bottom is provided with support in cylindrical shell, and bottom porous disc with holes is equipped with in support upper end, is provided with in the cylindrical shell of bottom porous disc top to place with holes on the test specimen and double-deck porous disc that pore size is adjustable; This bilayer porous disc top is provided with the device of regulating double-deck porous disc load-bearing pressure, and said cylinder body outer wall is provided with piezometric tube.
Further, the structure optimization of the device of the double-deck porous disc load-bearing of said adjusting pressure is that this bilayer porous disc links to each other with an increased pressure board through transmission rod, through the stress intensity of counterweight regulating action on test specimen at placement varying number on the increased pressure board.
Water pressure in the process of the test changes and the variation of flow in order to write down, and said supply channel is provided with pressure gauge and flowmeter, and this supply channel is provided with valve.
Be provided with cobblestone between said bottom porous disc and the base plate.
Said cylindrical shell top is provided with rising pipe, and the outlet below of this rising pipe is provided with graduated cylinder.
Increase by a support in seepage deformation tester barrel, the pressure that bottom porous disc transmission is come passes to base plate.Judge through the situation of beating of observing soil particle in the double-deck porous disc whether rock soil mass produces seepage deformation, produce the seepage deformation degree through regulating double-deck porous disc pore size control.
The invention has the beneficial effects as follows; Porous disc through being arranged on the test specimen upper and lower side pressurizes to test specimen; Pressure through on the adjustment increased pressure board is adjusted in the stress intensity on the test specimen, reaches to investigate the effect of STRESS VARIATION to the critical hydraulic gradient influence of ground seepage deformation; Through fluctuations in discharge in the record seepage deformation process, can calculate the infiltration coefficient after rock soil mass produces seepage deformation simultaneously.This device technique is reasonable in design, and is simple and reliable for structure, easy to operate.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is done further elaboration.
Fig. 1 is a structure principle chart of the present invention.
In the drawings:
The 1-cylindrical shell; The 2-pressure plare; The 3-transmission rod; 4-bottom porous disc;
The 5-piezometric tube; The 6-support; The 7-base plate; The 8-rising pipe;
The 9-pressure gauge; The 10-flowmeter; The 11-valve; The 12-water tank;
The 13-graduated cylinder; The 14-test specimen; The 15-cobblestone; The double-deck porous disc of 16-.
Embodiment
A kind of seepage deformation tester; As shown in Figure 1, comprise cylindrical shell 1 and the base plate 7 that is located at this cylindrical shell 1 lower end, this cylindrical shell 1 bottom links to each other with water tank 12 through supply channel; The bottom is provided with support 6 in cylindrical shell; Bottom porous disc 4 with holes is equipped with in support 6 upper ends, is provided with in the cylindrical shell 1 of bottom porous disc 4 tops to place with holes on the test specimen 14 and double-deck porous disc 16 that pore size is adjustable, and these bilayer porous disc 16 tops are provided with transmission rod 3; Transmission rod 3 links to each other with an increased pressure board 2, can place the different counterweight of quality on the increased pressure board 2.Regulate double-deck porous disc 16 load-bearing pressure, said cylindrical shell 1 outer wall is provided with piezometric tube 5.
Said supply channel is provided with the flowmeter 10 of the variation that is used for writing down pressure gauge 9 that the process of the test water pressure changes and flow, and this supply channel is provided with valve 11.
Be provided with cobblestone 15 between said bottom porous disc 4 and the base plate 7.
Said cylindrical shell 1 top is provided with rising pipe 8, and the outlet below of this rising pipe 8 is provided with graduated cylinder 13.