CN106568697B - A kind of infiltrative indoor model test device of test geomembrane and operating method - Google Patents

A kind of infiltrative indoor model test device of test geomembrane and operating method Download PDF

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Publication number
CN106568697B
CN106568697B CN201610954299.3A CN201610954299A CN106568697B CN 106568697 B CN106568697 B CN 106568697B CN 201610954299 A CN201610954299 A CN 201610954299A CN 106568697 B CN106568697 B CN 106568697B
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geomembrane
test
infiltrative
water
soil sample
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CN106568697A (en
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李术才
王欣桐
马秀媛
胡杰
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Shandong University
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Shandong University
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
    • G01N15/08Investigating permeability, pore-volume, or surface area of porous materials
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01DMEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00Measuring or testing not otherwise provided for
    • G01D21/02Measuring two or more variables by means not covered by a single other subclass
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
    • G01N15/08Investigating permeability, pore-volume, or surface area of porous materials
    • G01N2015/086Investigating permeability, pore-volume, or surface area of porous materials of films, membranes or pellicules

Abstract

The present invention relates to one kind for testing the infiltrative indoor model test device of geomembrane and operating method, including the fixed bonding system of visualizing monitor case system, boundary condition regulator control system, geomembrane, Integrated Measurement System and information Feedback Analysis System.Main body is visualizing monitor case, and material is tempered glass;Become level water tank room and controls boundary condition;The fixed bonding system of the geomembrane of the compositions such as geomembrane, porous disc, cementing agent, plugged zone is realized to geomembrane bonding, is fixed.The present invention can specifically be designed with regard to the boundary condition of research operating condition, geomembrane paving situation, and comprehensive, multi-level monitoring is carried out with regard to pore water osmotic pressure, soil body sedimentation, seepage discharge, seepage flow duration, infiltrating area, water-head, seepage paths length, it can be achieved to the infiltrative assessment of earth working material and measurement, compared with forefathers, it is simpler, more practicability, comprehensive, it is with the obvious advantage.

Description

A kind of infiltrative indoor model test device of test geomembrane and operating method
Technical field
The present invention relates to one kind for testing the infiltrative indoor model test device of geomembrane and operating method.
Background technique
Earth and rockfill dam is used as impervious material frequently with clay, concrete, geosynthetics etc..Wherein, because barrier performance is high, The features such as adaptive deformation ability is strong, speed of application is fast, simple process, low cost, geomembrane is widely applied.Geomembrane is Non- pore media, existing research not yet recognize penetration mechanism of the geomembrane under hydraulic gradient completely.The infiltration of geomembrane itself Saturating coefficient is generally 1 × 10-10M/s~1 × 10-15M/s, but transported as impervious barrier laying construction and under different engineering specifications When row, due to geomembrane directly overlap or bond quality it is bad, factory product it is defective, punctured by sharp object in bed course earth material The presence of situation, the practical infiltration coefficient of geomembrane will receive very big influence.Therefore, the geomembrane of different type, thickness is studied Synthesis permeability under Different Strata condition, different head condition, to instructing Practical Project to be very necessary.
Summary of the invention
The present invention is to overcome the shortcomings of above-mentioned technology, and the infiltrative indoor model test of geomembrane can be tested by providing one kind Device and operating method.
To achieve the above object, the present invention adopts the following technical solutions:
A kind of infiltrative indoor model test device of test geomembrane, including a rectangular monitoring case of visualization, in institute Two porous discs being parallel to each other and for fixing and overlapping geomembrane, two porous discs and prison are fitted in the monitoring case stated Rectangle soil sample case is formed between measuring tank side wall, the rectangle soil sample case is placed in the soil sample and surveyed for containing soil sample The various sensors of soil sample parameter are measured, the various sensors are connected with information analysis system;The rectangle soil sample case Two sides are to become level water tank room, and the change level water tank room is connected with external water supply device, and the external water supply device connects The disengaging water that flow instrument control becomes level water tank room is connect, real working condition is simulated.
Further, one layer of primary backing is overlapped in the inside of the porous disc, passed through on the inside of the primary backing Cementing agent pastes one layer of geomembrane.
Further, the longitudinal seam of the geomembrane and porous disc is sealed using the packing cloth for being coated with adhesive It is stifled, plugged zone is formed, and fix at longitudinal seam using fastener;The transverse joint is using extrusion REPAIR WELDING.
Further, the sensor includes to sense for measuring the pore water osmotic pressure of inside soil body osmotic pressure Device, for measuring the displacement sensor of surface displacement.
Further, the pore water osmolarity sensor is arranged in inside different soil, and displacement sensor is arranged in Surface of stratum.
Further, the outside of the rectangular monitoring case of visualization is equipped with scale value, for observing the variation of seepage discharge, The regulation of head difference is carried out at any time.
Further, the porous disc is apertured grills glass.
Further, the information analysis system includes computer and display, the sensor and computer phase Even, the computer carries out data analysis and feedback processing;And it is shown by data of the display to processing.
The infiltrative operating method of geomembrane, including the following steps are tested using above-mentioned apparatus:
1) wind primary backing on porous disc, brushing cementing agent, by geomembrane successively paving on cementing agent;
2) it smears adhesive using packing cloth to block the longitudinal seam of geomembrane and porous disc, longitudinal seam uses Fastener is fixed, and transverse joint is using extrusion REPAIR WELDING;
3) according to needed for test, the porous disc after bonding is inserted into the rectangular monitoring case of visualization, two porous discs with Rectangle soil sample case is formed between monitoring case side wall;The two sides of the rectangle soil sample case are to become level water tank room, will become water level water Chamber is connected with external water supply device;
4) it is needed that soil layer is arranged in rectangle soil sample case according to specific operating condition, cloth pore water infiltration is buried in soil layer setting up procedure Saturating pressure sensor and displacement sensor;
5) pore water osmolarity sensor and displacement sensor are connected with information analysis system;
6) flow control valve for adjusting water supply device, controls the water level of water tank room, sets the perimeter strip determined by operating condition Part;
7) at regular intervals, computer records the variation of all data and forms chart, analyzes test result.
Can be specifically arranged for single layer geomembrane, composite geo-membrane according to different operating conditions, repeat step 1) -5), control 6) -7 flow control situation processed repeats), obtained seepage discharge, duration, infiltrating area, water-head, infiltration is monitored according to step 7) The infiltration coefficient of geomembrane is calculated in electrical path length, and the variation of hole osmotic pressure and the soil body sedimentation monitored can intuitively embody It is infiltrative excellent, to need to provide help to concrete engineering.
The geomembrane is divided into multistage and successively carries out paving, adjacent both ends geomembrane paving mode are as follows: rear end geomembrane Leading portion is coated on the outside of the end of leading portion geomembrane.
The present invention has studied a kind of infiltrative indoor model test device of test geomembrane and operating method, solve by The practical infiltration coefficient of geomembrane is caused to differ larger problem with product parameters in laying construction fault, product self-defect etc., The synthesis permeability to the geomembrane of different type, thickness under Different Strata condition, different head conditions, realization pair can be tested The infiltrative assessment of earth working material, more simply, more practicability, comprehensive are with the obvious advantage.Compared with forefathers' research, the present invention Device has the advantage that
1) visualizing monitor case system intuitively observes simulation process, easy to assembly, economical and practical;
2) device controls water-head using flow valve, keeps boundary condition controllable, adaptive is strong, easy to operate;
3) device can be according to concrete engineering situation, to the specific material of geomembrane, the number of plies and practical bonding, overlap joint and weldering It connects situation to be configured, more truly reappears specific operating condition, the anti-seepage effect of simulation geomembrane in practical situations;
4) device carries out data acquisition using multiple sensors and measuring instrument, accomplishes real-time comprehensive monitoring, information analysis System analyzes for accurate data and timely feedback processing provides condition;
Detailed description of the invention
Fig. 1 is experimental rig schematic diagram of the present invention;
Fig. 2 is experimental rig two dimension front view;
Fig. 3 is apertured grills glass porous disc schematic diagram;
Fig. 4 is the fixed bonding system detail drawing of geomembrane;
Wherein, 1, the rectangular monitoring case of visualization;2, porous disc;3, become level water tank room;4, external water supply device;5, geotechnological Film;6, cementing agent;7, drainage channel;8, flow instrument;9, pore water osmolarity sensor;10, displacement sensor;11, computer; 12, display;13, transmission line;14, primary backing;15, packing cloth.
Specific embodiment
With reference to the accompanying drawing, specific implementation of the patent mode is further described.
As shown in Figs 1-4, the infiltrative indoor model test device of geomembrane, including a rectangular monitoring of visualization are tested Case is fitted with two porous discs being parallel to each other and for fixing and overlapping geomembrane in the monitoring case, and two thoroughly Rectangle soil sample case is formed between water plate and monitoring case side wall, the rectangle soil sample case is for containing soil sample, in the soil sample The interior various sensors for placing measurement soil sample parameter, the various sensors are connected with information analysis system;The rectangle The two sides of soil sample case are to become level water tank room, and the change level water tank room is connected with external water supply device, the external confession Water installations connect the disengaging water that flow instrument control system becomes level water tank room, simulate real working condition.
Specifically it can be divided into following system according to function:
Visualizing monitor case system, main body are to visualize rectangular monitoring case 1, and material is tempered glass, nesting two on pedestal A porous disc 2 for being used to fix and overlap geomembrane, two porous discs 2 and the rectangular prison of visualization between two porous discs A rectangle soil sample case is collectively formed in the side wall of measuring tank 1, and corresponding multiple sensors and measuring instrument are placed on the rectangle soil sample case It is interior.
Visualizing monitor case system be one be equipped with tempered glass rectangular monitoring case 1, soil sample case long 80cm, wide 60cm, High 50cm.
There is readable scale outside monitoring case, for observing the variation of seepage discharge.
Boundary regulator control system includes the change level water tank room 3 around soil sample case, and it is high to control water level by external water supply device 4 Low, connection flow instrument control system passes in and out water, simulates real working condition.Meanwhile having readable scale outside monitoring case, for observing seepage discharge Variation, at any time carry out head difference regulation.
Geomembrane fixes bonding system: the system is made of porous disc 2, geomembrane 5, cementing agent 6, plugged zone etc., is responsible for Fixed and overlap joint earth working material;
Porous disc 2 is apertured grills glass, and primary backing 14, and brushing cementing agent 6 are wound on plate, geomembrane 5 is coated on On cementing agent 6.Specifically, geomembrane is divided into multistage and successively carries out paving, adjacent both ends geomembrane paving mode are as follows: rear end geotechnique Film leading portion is coated on the outside of the end of leading portion geomembrane.
Primary backing 14 is glass fabric, and cementing agent 6 is made of epoxy resin and epoxy curing agent mixing.
The longitudinal seam of geomembrane and porous disc is blocked using the packing cloth 15 for being coated with cementing agent 6, forms plugged zone, And it is fixed at longitudinal seam using fastener;The transverse joint is using extrusion REPAIR WELDING.
Comprehensive monitor system is by flow instrument 8, pore water osmolarity sensor 9, displacement sensor 10, spiral micrometer, quarter Ruler, timer composition are spent, the monitoring of Comprehensive is carried out to the soil body;
Comprehensive monitor system is made of a variety of measuring instruments, the monitoring of Comprehensive is carried out to the soil body, as flow instrument 8 is used for Water tank room water level height is controlled, for measuring inside soil body osmotic pressure, displacement sensor 10 is used for pore water osmolarity sensor 9 Surface displacement is measured, spiral micrometer is for measuring geotechnological film thickness, and graduated scale is for measuring two sides cistern water level height, geotechnique Film participates in the length and width of infiltrating area, and timer is used to record the duration of flow event.
Pore water osmolarity sensor 9 is arranged in inside different soil, and displacement sensor 10 is arranged in surface of stratum.
Boundary regulator control system is made of the change level water tank room 3 of monitoring case two sides, and external water supply device 4 is water pump, connection Flow instrument 8, control disengaging water, i.e. control cistern water level height, water tank room bottom are equipped with drainage channel 7.
Information analysis system is made of computer 11, display 12, transmission line 13, pore water osmolarity sensor 9 and position Displacement sensor is connected by transmission line 13 with computer 11, and the computer 11 carries out data analysis and feedback processing;And it is logical The data for crossing 12 pairs of display processing are shown, complete the feedback processing of package unit.
Monitoring seepage action of ground water, sedimentation are realized using above-mentioned apparatus, and operating method includes the following steps:
1) on porous disc 2 wind primary backing 14, brushing cementing agent 6, by geomembrane 5 successively paving on cementing agent 6.
2) it smears cementing agent 6 using packing cloth 15 to block geomembrane 5 and the longitudinal seam of porous disc 2, Zong Xiangjie Seam is fixed using fastener, and transverse joint is using extrusion REPAIR WELDING.
3) according to needed for test, the porous disc 2 by monitoring case 1 and after bonding is nested up;Porous disc after bonding is inserted Enter to visualizing in rectangular monitoring case, forms rectangle soil sample case between two porous discs and monitoring case side wall;The rectangle soil The two sides of sample case are to become level water tank room, will become level water tank room and are connected with external water supply device;
4) it according to specific operating condition needs that soil layer is arranged, 9 He of cloth hole water penetration pressure sensor is buried in soil layer setting up procedure Displacement sensor 10;
5) each component connection of boundary regulator control system, comprehensive monitor system and information analysis system is finished;
6) flow instrument 8 is adjusted, the water level of water tank room 3 is controlled, sets the boundary condition determined by operating condition;
7) at regular intervals, computer 11 records the variation of all data and forms chart, analyzes test result.
It can be specifically arranged for single layer geomembrane, composite geo-membrane according to different operating conditions, be repeated (1)-(5), control Flow control situation repeats (6)-(7), and obtained seepage discharge, duration, infiltrating area, water-head, infiltration is monitored according to step (7) The infiltration coefficient of geomembrane is calculated in electrical path length, and the variation of hole osmotic pressure and the soil body sedimentation monitored can intuitively embody It is infiltrative excellent, to need to provide help to concrete engineering.
Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not protects model to the present invention The limitation enclosed, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art are not Need to make the creative labor the various modifications or changes that can be made still within protection scope of the present invention.

Claims (6)

1. a kind of infiltrative indoor model test device of test geomembrane, which is characterized in that including a rectangular prison of visualization Measuring tank is fitted with two porous discs being parallel to each other and for fixing and overlapping geomembrane in the monitoring case, permeable Plate is inserted vertically into, and rectangle soil sample case is formed between two porous discs and monitoring case side wall, the rectangle soil sample case is for containing Soil sample places the various sensors of measurement soil sample parameter, the various sensors and information analysis system in the soil sample System is connected;The two sides of the rectangle soil sample case are to become level water tank room, become the liquid level infiltration in level water tank room, described Change level water tank room be connected with external water supply device, the external water supply device connects flow instrument control system change level water tank room Disengaging water, simulate real working condition;
One layer of primary backing is overlapped in the inside of the porous disc, pastes one layer by cementing agent in the inside of the primary backing Geomembrane;
The longitudinal seam of the geomembrane and porous disc is blocked using the packing cloth for being coated with adhesive, forms plugged zone, And it is fixed at longitudinal seam using fastener;The transverse joint of geomembrane and porous disc is using extrusion REPAIR WELDING;
The sensor includes the pore water osmolarity sensor for measuring inside soil body osmotic pressure, for measuring earth's surface The displacement sensor of displacement;
The pore water osmolarity sensor is arranged in inside different soil, and displacement sensor is arranged in surface of stratum.
2. the test infiltrative indoor model test device of geomembrane as described in claim 1, which is characterized in that described can Outside depending on changing rectangular monitoring case is equipped with scale value, for observing the variation of seepage discharge, carries out the regulation of head difference at any time.
3. the test infiltrative indoor model test device of geomembrane as described in claim 1, which is characterized in that described is saturating Water plate is apertured grills glass.
4. the test infiltrative indoor model test device of geomembrane as described in claim 1, which is characterized in that the letter Ceasing analysis system includes computer and display, and the sensor is connected with computer, and the computer carries out data point Analysis and feedback processing;And it is shown by data of the display to processing.
5. the infiltrative indoor model test device test geomembrane of test geomembrane according to any one of claims 1-4 seeps The operating method of permeability, which is characterized in that including the following steps:
1) wind primary backing on porous disc, brushing cementing agent, by geomembrane successively paving on cementing agent;
2) it smears adhesive using packing cloth to block the longitudinal seam of geomembrane and porous disc, longitudinal seam is using fastening Part is fixed, and transverse joint is using extrusion REPAIR WELDING;
3) according to needed for test, the porous disc after bonding is inserted into the rectangular monitoring case of visualization, two porous discs and monitoring Rectangle soil sample case is formed between case side wall;The two sides of the rectangle soil sample case are to become level water tank room, will become level water tank room It is connected with external water supply device;
4) it is needed that soil layer is arranged in rectangle soil sample case according to specific operating condition, cloth hole water penetration pressure is buried in soil layer setting up procedure Sensor and displacement sensor;
5) pore water osmolarity sensor and displacement sensor are connected with information analysis system;
6) flow control valve for adjusting water supply device, controls the water level of water tank room, sets the boundary condition determined by operating condition;
7) at regular intervals, computer records the variation of all data and forms chart, analyzes test result.
6. the infiltrative indoor model test device of test geomembrane tests the infiltrative behaviour of geomembrane as claimed in claim 5 Make method, which is characterized in that can be specifically arranged for single layer geomembrane, composite geo-membrane according to different operating conditions, repeat to walk It is rapid 1) -5), control flow control situation, repeat 6) -7), monitor obtained seepage discharge, duration, permeable face according to step 7) Product, water-head, seepage paths length, are calculated the infiltration coefficient of geomembrane.
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CN201265164Y (en) * 2008-09-28 2009-07-01 浙江大学 Base pit engineering seepage failure model test apparatus
CN102980842B (en) * 2012-12-11 2015-01-07 重庆交通大学 System and method for testing anisotropy permeability coefficient of layered coarse-grained soil body
CN103675231B (en) * 2013-11-22 2015-08-19 长沙理工大学 A kind of solum settlement tester and test method thereof
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