CN102980842A - System and method for testing anisotropy permeability coefficient of layered coarse-grained soil body - Google Patents
System and method for testing anisotropy permeability coefficient of layered coarse-grained soil body Download PDFInfo
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Abstract
The invention discloses a system and a method for testing an anisotropy permeability coefficient of a layered coarse-grained soil body. The system comprises an upstream water supply device, a permeability device, a downstream water metering device and a data acquisition system, wherein the upstream water supply device injects the stored testing water into the permeability device; the infiltration water passing through the permeability device is collected to the downstream water metering device; and the permeability device and the downstream water metering device input the acquired infiltration information into the data acquisition system for processing the information through an information acquisition device. The operations of preparing a sample, saturating the sample, measuring the water head at a water section in real time and measuring the water quantity passing through the sample are directly performed in a sample chamber of the system, and disturbance of the system is avoided. The sample is cuboid-shaped, the sample section perpendicular to the permeability direction is square, the sample section parallel to the permeability direction is rectangular, side length along the permeability direction is two times of the side length perpendicular to the permeability direction, and the sample is suitable for testing the anisotropy permeability coefficient of the layered coarse-grained soil body.
Description
Technical field
The invention belongs to the soil test technique field, particularly a kind of test macro and method of testing of measuring stratiform coarse grain Soil Anisotropic infiltration coefficient.
Background technology
Soil body osmotic coefficient is the quantitative target of reflection soil body water permeability, is an extremely important index of the water permeable ability of estimating the soil body in the engineering, impermeabilisation deformability, impermeabilisation damage capability etc.In soil body engineering, common construction method is the successively rear compacting in empty shop of earth material, and the earth structure of formation has significant stratiform characteristic.Because construction method causes that earth structure has had the stratiform characteristic, cause its Penetration Signature also to present significant anisotropic properties, the infiltration coefficient that namely is parallel to aspect obviously is different from the infiltration coefficient perpendicular to aspect.The mensuration problem of the anisotropy infiltration coefficient of research Multilayered Soil has important practical significance.
The method of test soil body osmotic coefficient mainly contains two kinds of test in situ and shop experiments, and wherein shop experiment is divided into constant head test and varying head test, all based on the Darcy's law calculation permeability coefficient.Constant head test is applicable to test the infiltration coefficient of the stronger soil body of perviousness.Constant head test in the existing earthwork test rule of China can only be tested homogeneous soil sample or stratiform soil sample perpendicular to the infiltration coefficient of aspect, can't test the infiltration coefficient that is parallel to aspect.
At present, the instrument of indoor measurement soil body osmotic coefficient is existing multiple, is divided into rigid-walled permeameter and gentle wall type permeameter according to the constraint condition around the sample; Be divided into constant head test and varying head test according to the situation that applies head.Rigid-walled permeameter commonly used mainly contains 70 type permeameters, southern 55 type permeameters etc.70 type permeameters are applicable to measure the infiltration coefficient of sandy soil, and southern 55 type permeameters are applicable to measure the infiltration coefficient of cohesive soil.Gentle wall type permeameter improves mainly with triaxial tester and forms, and soil sample is inserted in rubber pattern to apply the side direction confined pressure, carries out permeability test.Existing permeameter ubiquity specimen size seepage pressure less, that provide is little, test period length, hermetic seal weak effect, can't measure the defectives such as the infiltration coefficient that is parallel to aspect, instrumentation complexity.Many scholars have carried out improving or having developed new instrument for particular problem to conventional permeameter, but or still can't test the infiltration coefficient that is parallel to aspect; Or namely allow to test the infiltration coefficient that is parallel to aspect, it is saturated still to exist complicated operation, test duration length, sample to be difficult for, the defectives such as infiltration coefficient that can't test both direction in same instrument.
For conventional permeameter and existing improve the problem that instrument can not satisfy Accurate Determining stratiform coarse grain Soil Anisotropic infiltration coefficient, need a kind of infiltration experiment system of development with the method for testing of the anisotropy infiltration coefficient of test stratiform coarse-grained soil body.
Summary of the invention
Given this, technical matters to be solved by this invention is how to test the anisotropy infiltration coefficient of stratiform coarse-grained soil body.
One of purpose of the present invention is to propose a kind of stratiform coarse grain Soil Anisotropic infiltration coefficient test macro; Two of purpose of the present invention is to propose a kind of stratiform coarse grain Soil Anisotropic infiltration coefficient method of testing.
One of purpose of the present invention is achieved through the following technical solutions:
Stratiform coarse grain Soil Anisotropic infiltration coefficient test macro provided by the invention comprises upstream water supply installation, permeability apparatus, downstream water gaging device and data acquisition system (DAS); Described upstream water supply installation is injected into permeability apparatus with the test water that stores, infiltration water through permeability apparatus will be collected into downstream water gaging device, and described permeability apparatus and downstream water gaging device carry out information processing by the infiltration input information that the information collecting device that arranges will gather to data acquisition system (DAS).
Further, described upstream water supply installation comprises the high pressurized gas that water-vapor exchange device and water supply vapour interchanger for the storage test water provide the gases at high pressure that are insoluble in water; Described high pressurized gas passes into gases at high pressure in the water-vapor exchange device by the pressed gas draft tube, and described water-vapor exchange device is pressed into test water in the permeability apparatus by the press water water inlet pipe.
Further, described permeability apparatus comprises intake chamber, sample chamber and water-supplying chamber; Be provided with porous disc between described intake chamber and the sample chamber; Be provided with porous disc between described sample chamber and the water-supplying chamber; Described intake chamber is equipped with for the water pressure sensor of measuring the intake chamber head; Described water-supplying chamber is equipped be used to the water pressure sensor of measuring the hydroecium head; Described sample chamber equidistantly is equipped with a plurality of for measuring the fixedly pore water pressure sensor of water-carrying section head; Described intake chamber is connected with the upstream water supply installation by the press water water inlet pipe; Described water-supplying chamber is connected with downstream water gaging device by rising pipe.
Further, described sample chamber be shaped as cuboid, it is of a size of a * a * b, and b is 2-4 times of a; An a of described sample chamber * b rectangle side and the side of a * a square sides for opening; Described intake chamber and water-supplying chamber are of a size of a * a * c, and wherein, c is the thickness of intake chamber and water-supplying chamber, and c is 0.1-0.5 times of a.
Further, described downstream water gaging device comprises tank and is arranged at LOAD CELLS, flow sensor and timing sensor on the tank; Described tank is used for holding the infiltration water by sample, and in order to prevent the liquid surface evaporation loss water yield, this container is Semi-seal structure; Described LOAD CELLS is for the mass change of measuring water in the tank; Described flow sensor is used for measuring the flow that enters water in the tank; Described timing sensor is used for lasting of record tank water yield change procedure; Described data acquisition system (DAS) is used for automatically gathering, stores and analyzes the test figure that collects permeability apparatus and downstream water gaging device.
Two of purpose of the present invention is achieved through the following technical solutions:
Stratiform coarse grain Soil Anisotropic infiltration coefficient provided by the invention carries out anisotropy infiltration coefficient method of testing, may further comprise the steps:
S1: prepare the test earth material, and earth material is divided at least 2 parts;
S2: the requirement parallel or vertical with water-carrying section selects to open the respective side of aforementioned stratiform coarse-grained soil body anisotropy infiltration coefficient test macro sample chamber according to the aspect of preparation sample;
S3: a copy of it test earth material sample chamber of stratiform coarse grain Soil Anisotropic infiltration coefficient test macro of packing into, and be compacted to the packing of requirement;
S4: repeating step S3, until stratiform coarse grain Soil Anisotropic infiltration coefficient test macro sample chamber is full of sample fully;
S5: the side of the stratiform coarse grain Soil Anisotropic infiltration coefficient test macro sample chamber of opening among the airtight step S2;
S6: saturated sample;
S7: directly to carry out the infiltration coefficient test through oversaturated sample;
S8: finish test.
Further, described sample be shaped as cuboid, it is of a size of a * a * b, be square perpendicular to the sample section of infiltration direction, its length of side is a, and a is sample particle diameter d
855-10 times; B is specimen length, and b is 2-4 times of a.
Further, described sample prepares and adopts the method for compaction in layers to be prepared, and the sample after the preparation is directly used in its infiltration coefficient of test; It is as follows that described sample prepares concrete steps:
Described sample preparation comprises the preparation that is parallel to aspect infiltration sample and the preparation of permeating sample perpendicular to aspect; Described sample preparation is parallel to the preparation of aspect infiltration coefficient sample, the empty shop of employing layering in permeability apparatus tested earth material and successively compacting sample preparation, the aspect of described preparation sample is parallel with the long limit of sample, with the transversal cross section perpendicular of sample so that it is consistent to permeate direction in aspect and the test;
Described preparation perpendicular to aspect infiltration sample; The empty shop of employing layering in permeability apparatus tested earth material and successively compacting sample preparation, and the aspect of described preparation sample is vertical with the long limit of sample, parallel with the transversal section of sample, so that permeate perpendicular direction in aspect and the test; Described sample basal spacing, earth material type are determined according to test objective.
Further, described infiltration coefficient test specifically may further comprise the steps:
S51: determine two water-carrying section in the sample, and measure two between water-carrying section distance and the area of water-carrying section;
S52: the head at test water-carrying section place, pore water pressure sensor or the pore water pressure piezometric tube real-time Accurate Measurement of the head at described water-carrying section place by being installed in the water-carrying section place;
S53: test is by the water yield of water-carrying section, and the described water yield by water-carrying section adopts the flow sensor that is installed in the sample water delivering orifice directly to measure or the LOAD CELLS indirect determination;
S54: test lasts measurement, and described test lasts by timer or timing sensor to be measured.
Further, the test of described infiltration coefficient comprises the infiltration coefficient test that is parallel to aspect and perpendicular to the infiltration coefficient test of aspect;
The described infiltration coefficient test that is parallel to aspect is used for being parallel to the infiltration coefficient test of aspect infiltration sample;
Described infiltration coefficient test perpendicular to aspect is used for the infiltration coefficient test perpendicular to aspect infiltration sample.
The invention has the advantages that: the test macro of measurement stratiform coarse grain Soil Anisotropic infiltration coefficient provided by the invention adopts upstream water supply installation, permeability apparatus, downstream water gaging device and data acquisition system (DAS); So that the sample of permeability test test can be prepared sample, saturated sample, measure the head at water-carrying section place and the water yield by sample in real time, so that according to the Darcy's law calculation permeability coefficient in the sample chamber of this device.The present invention adopts the method for compaction in layers to prepare sample, and the sample after will preparing be directly used in the test its infiltration coefficient, avoided like this disturbance to sample.Employing is shaped as the sample of cuboid, sample section perpendicular to the infiltration direction is square, being parallel to the section that permeates direction is rectangle, and along permeating the direction length of side greater than 2 times of the vertical infiltration direction length of side, this sample is suitable for testing the anisotropy infiltration coefficient of stratiform coarse-grained soil body.
Description of drawings
In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing, wherein:
Fig. 1 is the structural representation of infiltration coefficient test macro of the present invention;
Fig. 2 is the structural representation of upstream of the present invention water supply installation;
Fig. 3 is permeability apparatus structural representation of the present invention;
Fig. 4 is downstream of the present invention water gaging apparatus structure synoptic diagram.
Fig. 5 is specimen shape of the present invention and size synoptic diagram;
Fig. 6 is the sample synoptic diagram that is parallel to the aspect infiltration coefficient for the preparation of test of the present invention;
Fig. 7 is of the present invention for the preparation of the sample synoptic diagram of test perpendicular to the aspect infiltration coefficient;
Fig. 8 is infiltration coefficient method of testing synoptic diagram of the present invention.
Among the figure: the water supply installation of 11-upstream; The 12-permeability apparatus; 13-downstream water gaging device; The 14-data acquisition system (DAS); 21-water-vapor exchange device; The 22-high pressurized gas; 23-pressed gas draft tube; 24-press water water inlet pipe; The 31-intake chamber; The 32-sample chamber; 33-water-supplying chamber; The 34-porous disc; The 35-rising pipe; The 36-pore water pressure sensor; 37,38-water pressure sensor; The 41-tank; The 42-LOAD CELLS; The 43-flow sensor; 44-timing sensor; 51-upstream head; 52-downstream head; 53-permeates direction; 54-is parallel to the aspect of permeating direction; 55-is perpendicular to the aspect of infiltration direction; The head at water-carrying section place, 81-upstream; The head at water-carrying section place, 82-downstream; Distance between 83-two water-carrying section; 84-upstream water-carrying section; 85-downstream water-carrying section.
Embodiment
Below with reference to accompanying drawing, the preferred embodiments of the present invention are described in detail; Should be appreciated that preferred embodiment only for the present invention is described, rather than in order to limit protection scope of the present invention.
Fig. 1 is the structural representation of infiltration coefficient test macro of the present invention, Fig. 2 is the structural representation of upstream of the present invention water supply installation, Fig. 3 is permeability apparatus structural representation of the present invention, Fig. 4 is downstream of the present invention water gaging apparatus structure synoptic diagram, as shown in the figure: stratiform coarse grain Soil Anisotropic infiltration coefficient test macro provided by the invention comprises upstream water supply installation 11, permeability apparatus 12, downstream water gaging device 13 and data acquisition system (DAS) 14;
The purpose of upstream water supply installation is to provide the water that sample is saturated and the infiltration coefficient test is required to sample, and has certain head, and this device links to each other with the intake chamber of permeability apparatus.Described upstream water supply installation is injected into permeability apparatus with the test water that stores, infiltration water through permeability apparatus will be collected into downstream water gaging device, and described permeability apparatus and downstream water gaging device carry out information processing by the infiltration input information that the information collecting device that arranges will gather to data acquisition system (DAS).
Described upstream water supply installation comprises the water-vapor exchange device 21 of the water that uses for storage test and the high pressurized gas 22 that water supply vapour interchanger provides the gases at high pressure that are insoluble in water; Described high pressurized gas is pressed into gases at high pressure in the water-vapor exchange device by pressed gas draft tube 23; Described water-vapor exchange device enters to permeate in the device with hydraulic pressure by press water water inlet pipe 24.
The water-vapor exchange device can store the water that enough tests is used, and can make glassware for drinking water that higher head is arranged under the condition of high-pressure air source having, and offers the intake chamber of permeability apparatus by water inlet pipe.High pressurized gas water supply vapour interchanger provides the gases at high pressure that are insoluble in water, such as nitrogen.
Permeability apparatus is the core of infiltration experiment system, its objective is preparation sample, saturated sample, measures the head at water-carrying section place and the water yield by sample in real time, so that according to the Darcy's law calculation permeability coefficient.Described permeability apparatus comprises intake chamber 31, sample chamber 32 and water-supplying chamber 33; Be provided with porous disc 34 between described intake chamber and the sample chamber; Be provided with porous disc between described sample chamber and the water-supplying chamber; Described intake chamber is equipped with for the water pressure sensor 37 of measuring the intake chamber head; Described water-supplying chamber is equipped be used to the water pressure sensor 38 of measuring the hydroecium head; In order to measure respectively the head of intake chamber and water-supplying chamber.
Described sample chamber equidistantly is equipped with for measuring the fixedly pore water pressure sensor 36 of water-carrying section head; Sample chamber is equidistantly installed 4 pore water pressure sensors in the present embodiment, in order to measure simultaneously 4 fixedly heads of water-carrying section.Described intake chamber is connected with the upstream water supply installation by press water water inlet pipe 24, and water-supplying chamber is connected with downstream water gaging device by rising pipe 35.
Described sample chamber be shaped as cuboid, it is of a size of a * a * b(a and is the length of side perpendicular to the infiltration direction, b is parallel to the length of side of permeating direction), and b should be not less than 2 times of a, be b 〉=2a, b is 2-4 times of a in the present embodiment, also can change by actual requirement; An a of described sample chamber * b rectangle side and the side of a * a square sides for opening; Described intake chamber and water-supplying chamber are of a size of the thickness that a * a * c(c is intake chamber and water-supplying chamber, and c is about 0.1-0.5 times of a).
The purpose of downstream water gaging device is to measure by the water yield of sample and the time of experience, and this device links to each other with the water-supplying chamber of permeability apparatus.Described downstream water gaging device comprises tank 41 and is arranged at LOAD CELLS 42, flow sensor 43 and timing sensor 44 on the tank;
Described tank is used for holding the water by the sample infiltration, and in order to prevent the liquid surface evaporation loss water yield, this container is Semi-seal structure.
Described LOAD CELLS, the mass change for measuring water in the tank in order to indirectly obtain the volume of water, can calculate flow.
Described flow sensor is used for measuring the flow that enters water in the tank, and flow sensor is used for direct measuring flow.LOAD CELLS and flow sensor replenish mutually, and be correct to guarantee the flow measurement result.
Described timing sensor is used for lasting of record tank water yield change procedure.
Described data acquisition system (DAS) is used for automatically gathering, stores and analyzes the test figure that collects permeability apparatus and downstream water gaging device.This system is used for automatic collection, storage and analytical test data, links to each other with each sensor in the water gaging device of downstream with permeability apparatus, is comprised of data acquisition device, computing machine and data collection and analysis software three parts.
Also comprise test accessories, described test accessories comprises sample preparation compactor and balance.
Fig. 5 is specimen shape of the present invention and size synoptic diagram, Fig. 6 is the sample synoptic diagram that is parallel to the aspect infiltration coefficient for the preparation of test of the present invention, Fig. 7 is of the present invention for the preparation of the sample synoptic diagram of test perpendicular to the aspect infiltration coefficient, Fig. 8 is infiltration coefficient method of testing synoptic diagram of the present invention, among the figure, upstream head 51; Downstream head 52; Infiltration direction 53; Be parallel to the aspect 54 of permeating direction; Aspect 55 perpendicular to the infiltration direction; The head 81 at water-carrying section place, upstream; The head 82 at water-carrying section place, downstream; Distance 83 between two water-carrying section; Upstream water-carrying section 84; Downstream water-carrying section 85, as shown in the figure: stratiform coarse grain Soil Anisotropic infiltration coefficient method of testing provided by the invention may further comprise the steps:
S1: prepare the test earth material, and the test earth material is divided at least 2 parts, also can distribute the test earth material according to actual requirement;
S2: determine specimen size.Sample be shaped as cuboid, it is of a size of a * a * b, be square perpendicular to the sample section of infiltration direction, its length of side is a, and a is not less than sample particle diameter d
855 times, getting a in the present embodiment is sample particle diameter d
855-10 times; B is specimen length, and b is 2-4 times of a.
S3: the requirement parallel or vertical with water-carrying section selects to open the respective side of aforementioned stratiform coarse-grained soil body anisotropy infiltration coefficient test macro sample chamber according to the aspect of preparation sample;
S4: a copy of it test earth material sample chamber of stratiform coarse grain Soil Anisotropic infiltration coefficient test macro of packing into, and be compacted to the packing of requirement;
S4: repeating step S3, until stratiform coarse grain Soil Anisotropic infiltration coefficient test macro sample chamber is full of sample fully;
S5: the side of the stratiform coarse grain Soil Anisotropic infiltration coefficient test macro sample chamber of opening among the airtight step S2.
Described sample prepares the method preparation of adopting compaction in layers, and the sample after the preparation is directly used in its infiltration coefficient of test.It is as follows that described sample prepares concrete steps:
Described sample preparation comprises the preparation that is parallel to aspect infiltration sample and the preparation of permeating sample perpendicular to aspect; Described sample preparation is parallel to the preparation of aspect infiltration coefficient sample, the empty shop of employing layering in permeability apparatus tested earth material and successively compacting sample preparation, the aspect of prepared sample is parallel with the long limit of sample, with the transversal cross section perpendicular of sample so that it is consistent to permeate direction in aspect and the test;
Described preparation perpendicular to aspect infiltration sample; The empty shop of employing layering in permeability apparatus tested earth material and successively compacting sample preparation, and the aspect of prepared sample is vertical with the long limit of sample, parallel with the transversal section of sample, so that permeate perpendicular direction in aspect and the test.
Described sample basal spacing, earth material type are determined according to test objective.Each basal spacing in the sample can be identical, also can be different; Each layer earth material can be identical in the sample, also can be different.
Described permeability apparatus is the sample chamber of cuboid, described sample chamber is provided with the side of two orthogonal directions can opening respectively, the requirement parallel or vertical with water-carrying section selects to open the respective side of sample chamber according to the aspect of preparation sample, then prepares the sample that satisfies testing requirements in sample chamber.
S6: saturated sample;
S7: directly to carry out the infiltration coefficient test through oversaturated sample; Theoretical according to seepage action of ground water, the infiltration coefficient of the test soil body, described infiltration coefficient test specifically may further comprise the steps:
S71: determine two water-carrying section in the sample, and measure two between water-carrying section distance and the area of water-carrying section;
S72: the head at test water-carrying section place, pore water pressure sensor and/or the pore water pressure piezometric tube the real time measure of the head at described water-carrying section place by being installed in the water-carrying section place;
S73: test is by the water yield of water-carrying section, and the described water yield by water-carrying section is directly measured and/or the LOAD CELLS indirect determination by the flow sensor that is installed in the sample water delivering orifice;
S74: test lasts measurement, and described test lasts by timer and/or timing sensor to be measured.
The test of described infiltration coefficient comprises the infiltration coefficient test that is parallel to aspect and perpendicular to the infiltration coefficient test of aspect;
The described infiltration coefficient test that is parallel to aspect is used for being parallel to the infiltration coefficient test of aspect infiltration sample;
Described infiltration coefficient test perpendicular to aspect is used for the infiltration coefficient test perpendicular to aspect infiltration sample.
S8: finish test.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and obviously, those skilled in the art can carry out various changes and modification and not break away from the spirit and scope of the present invention the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (10)
1. stratiform coarse grain Soil Anisotropic infiltration coefficient test macro is characterized in that: comprise upstream water supply installation, permeability apparatus, downstream water gaging device and data acquisition system (DAS); Described upstream water supply installation is injected into permeability apparatus with the test water that stores, and will collect downstream water gaging device through the infiltration water of permeability apparatus, described permeability apparatus and downstream water gaging device carry out information processing by the infiltration input information that the information collecting device that arranges will gather to data acquisition system (DAS).
2. stratiform coarse grain Soil Anisotropic infiltration coefficient test macro according to claim 1 is characterized in that: described upstream water supply installation comprises the high pressurized gas that the gases at high pressure that are insoluble in water are provided for the water-vapor exchange device of storage test water and water supply vapour interchanger; Described high pressurized gas passes into gases at high pressure in the water-vapor exchange device by the pressed gas draft tube, and described water-vapor exchange device is pressed into test water in the permeability apparatus by the press water water inlet pipe.
3. stratiform coarse grain Soil Anisotropic infiltration coefficient test macro according to claim 1, it is characterized in that: described permeability apparatus comprises intake chamber, sample chamber and water-supplying chamber; Be provided with porous disc between described intake chamber and the sample chamber; Be provided with porous disc between described sample chamber and the water-supplying chamber; Described intake chamber is equipped with for the water pressure sensor of measuring the intake chamber head; Described water-supplying chamber is equipped be used to the water pressure sensor of measuring the hydroecium head; Described sample chamber equidistantly is equipped with a plurality of for measuring the fixedly pore water pressure sensor of water-carrying section head; Described intake chamber is connected with the upstream water supply installation by the press water water inlet pipe; Described water-supplying chamber is connected with downstream water gaging device by rising pipe.
4. stratiform coarse grain Soil Anisotropic infiltration coefficient test macro according to claim 3 is characterized in that: described sample chamber be shaped as cuboid, it is of a size of a * a * b, and b is 2-4 times of a; An a of described sample chamber * b rectangle side and the side of a * a square sides for opening; Described intake chamber and water-supplying chamber are of a size of a * a * c, and wherein, c is the thickness of intake chamber and water-supplying chamber, and c is 0.1-0.5 times of a.
5. stratiform coarse grain Soil Anisotropic infiltration coefficient test macro according to claim 1 is characterized in that: described downstream water gaging device comprises tank and is arranged at LOAD CELLS, flow sensor and timing sensor on the tank; Described tank is used for holding the infiltration water by sample, and in order to prevent the liquid surface evaporation loss water yield, this tank is Semi-seal structure; Described LOAD CELLS is for the mass change of measuring water in the tank; Described flow sensor is used for measuring the flow that enters water in the tank; Described timing sensor is used for lasting of record tank water yield change procedure; Described data acquisition system (DAS) is used for automatically gathering, stores and analyzes the test figure that collects permeability apparatus and downstream water gaging device.
6. utilize each described stratiform coarse grain Soil Anisotropic infiltration coefficient among the claim 1-5 to carry out the method for testing of anisotropy infiltration coefficient, it is characterized in that: may further comprise the steps:
S1: prepare the test earth material, and earth material is divided at least 2 parts;
S2: the requirement parallel or vertical with water-carrying section selects to open the respective side of aforementioned stratiform coarse-grained soil body anisotropy infiltration coefficient test macro sample chamber according to the aspect of preparation sample;
S3: a copy of it test earth material sample chamber of stratiform coarse grain Soil Anisotropic infiltration coefficient test macro of packing into, and be compacted to the packing of requirement;
S4: repeating step S3, until stratiform coarse grain Soil Anisotropic infiltration coefficient test macro sample chamber is full of sample fully;
S5: the side of the stratiform coarse grain Soil Anisotropic infiltration coefficient test macro sample chamber of opening among the airtight step S2;
S6: saturated sample;
S7: directly to carry out the infiltration coefficient test through oversaturated sample;
S8: finish test.
7. stratiform coarse grain Soil Anisotropic infiltration coefficient method of testing according to claim 6, it is characterized in that: described sample be shaped as cuboid, it is of a size of a * a * b, be square perpendicular to the sample section of infiltration direction, its length of side is a, and a is sample particle diameter d
855-10 times; B is specimen length, and b is 2-4 times of a.
8. stratiform coarse grain Soil Anisotropic infiltration coefficient method of testing according to claim 6 is characterized in that: described sample prepares and adopts the method for compaction in layers to be prepared, and the sample after the preparation is directly used in its infiltration coefficient of test; It is as follows that described sample prepares concrete steps:
Described sample preparation comprises the preparation that is parallel to aspect infiltration sample and the preparation of permeating sample perpendicular to aspect; Described sample preparation is parallel to the preparation of aspect infiltration coefficient sample, the empty shop of employing layering in permeability apparatus tested earth material and successively compacting sample preparation, the aspect of described preparation sample is parallel with the long limit of sample, with the transversal cross section perpendicular of sample so that it is consistent to permeate direction in aspect and the test;
Described preparation perpendicular to aspect infiltration sample; The empty shop of employing layering in permeability apparatus tested earth material and successively compacting sample preparation, and the aspect of described preparation sample is vertical with the long limit of sample, parallel with the transversal section of sample, so that permeate perpendicular direction in aspect and the test; Described sample basal spacing, earth material type are determined according to test objective.
9. stratiform coarse grain Soil Anisotropic infiltration coefficient method of testing according to claim 6 is characterized in that: described infiltration coefficient test specifically may further comprise the steps:
S51: determine two water-carrying section in the sample, and measure two between water-carrying section distance and the area of water-carrying section;
S52: the head at test water-carrying section place, pore water pressure sensor or the pore water pressure piezometric tube the real time measure of the head at described water-carrying section place by being installed in the water-carrying section place;
S53: test is by the water yield of water-carrying section, and the described water yield by water-carrying section adopts the flow sensor that is installed in the sample water delivering orifice directly to measure or the LOAD CELLS indirect determination;
S54: test lasts measurement, and described test lasts by timer or timing sensor to be measured.
10. stratiform coarse grain Soil Anisotropic infiltration coefficient method of testing according to claim 6 is characterized in that: described infiltration coefficient test comprises the infiltration coefficient test that is parallel to aspect and perpendicular to the infiltration coefficient test of aspect;
The described infiltration coefficient test that is parallel to aspect is used for being parallel to the infiltration coefficient test of aspect infiltration sample;
Described infiltration coefficient test perpendicular to aspect is used for the infiltration coefficient test perpendicular to aspect infiltration sample.
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