CN108645712A - Geosynthetics tensile test apparatus based on soil medium - Google Patents

Abstract

The present invention provides a kind of geosynthetics tensile test apparatus based on soil medium, belong to geosynthetics technical field of measurement and test, including two layers or more of host body panel, the console and data collector being connected with host body panel, host body panel includes installation frame, be set on installation frame for holding filler and installing soil sample box, the cross horizontal stretch device and xial feed loading device positioned at four side of soil sample box of test specimen；Console is used to acquire the data information during experiment for setting experiment parameter, data collector.Geosynthetics tensile test apparatus provided by the invention based on soil medium, host body panel can carry out three dimensional taest to the test specimen of the geosynthetics based on soil medium, really reflect geosynthetics deformation performance under soil medium three-dimensional stress constraint, improve test accuracy simultaneously, test efficiency is improved, the technique effect of occupation of land problem is saved.

Description

Tensile test device for geosynthetics based on soil medium

technical field

The invention belongs to the technical field of geosynthetics testing, and more specifically relates to a tensile test device for geosynthetics based on soil media.

Background technique

With the rapid development of my country's economic construction, geosynthetics such as geogrids and geomembranes have been more and more widely used in engineering structures. The outer drum even became unstable. After investigation and research by experts, it was found that more than half of this situation was caused by errors in the selection of material design values.

At present, the parameters of geosynthetics in engineering design, analysis calculation and safety evaluation are still based on the traditional uniaxial tensile test results. Geosynthetics are mostly planar flexible polymer materials. When they are located inside or on the surface of a structure, they are mostly in a state of plane stress.

For example, the patent document with application number 201019026078.X discloses a bidirectional tensile creep tester for geosynthetics, and the above-mentioned test equipment is used for tensile creep test in air medium. In actual engineering applications, geosynthetics play a corresponding role by contacting with the surrounding soil, and the contact with the soil will be restricted by the soil medium, so the geosynthetics in the air medium The measured mechanical properties are different from the real force of geosynthetics in actual engineering, which leads to the need to use strength reduction coefficients in engineering design. If the reduction coefficient is too large, there will be safety problems, and if the reduction coefficient is too small, it will cause material waste. , thus affecting the application and safety of geosynthetics in reinforced soil structures. Geosynthetics in the soil will not only be subject to the confinement of the soil medium, but also be subjected to different normal loads due to different embedding depths.

Combined with the above analysis, it is found that the real stress state of geosynthetics in practical application is: in the soil medium, it is not only subject to the lateral constraints in the X-Y plane, but also the normal load in the Z direction, that is, the geosynthetics will be in the soil. Therefore, the results obtained by the traditional uniaxial tensile test in the air medium cannot reflect the real working state and stress characteristics of geosynthetics. Therefore, it is necessary to improve the existing testing equipment, so that the measured results using the improved testing equipment can truly reflect the working state and stress characteristics of geosynthetics, so as to provide reference for engineering design.

In addition, in order to eliminate the experimental error caused by material properties and accidental factors when conducting indoor tests, it is generally required to conduct no less than three sets of tests under the same conditions, and then compare the test results. However, in order to meet the purpose of observation with equal precision during the specific operation of the three groups of experiments, simultaneous experiments are required. Existing geosynthetics tensile test equipment, one equipment can only test a group of samples during the test, if the traditional test device is used, it is necessary to purchase three identical instruments during the test, not only the cost is relatively high, but also Moreover, the operation is inconvenient. At the same time, the land occupation of the three instruments is also a problem that needs to be solved. Therefore, how to save costs and land occupation under the premise of ensuring the test accuracy also requires us to think carefully.

In order to more realistically simulate the deformation performance of geosynthetics under the three-dimensional stress state of the soil medium, improve the test accuracy, improve the test efficiency, and save land occupation, a tensile test device for geosynthetics based on soil medium is proposed, which has important practical application value.

Contents of the invention

The purpose of the present invention is to provide a geosynthetic material tensile test device based on soil medium to solve the technical problems of low test accuracy, low test efficiency, inconvenient operation and large floor space of the test device existing in the prior art.

In order to achieve the above object, the technical solution adopted in the present invention is: provide a kind of geosynthetic material tension test device based on soil medium, comprise the main frame platform of more than two layers, the console that is connected with described main frame platform and data collector;

The main frame platform includes an installation frame, a soil sample box arranged on the installation frame for holding fillers and installing specimens, and cross-shaped horizontal tension boxes for sample tests on the four sides of the soil sample box. device and an axial load loading device positioned above the soil sample box;

The cross-shaped horizontal tensioning device includes a clamping device for clamping the test piece, a linear guide rail fixed on the installation frame, a slider fixed on the linear guide rail and connected with the clamping device , a screw rod connected with the clamping device, a tension pressure sensor located between the clamping device and the screw rod, a speed reducer connected with the other end of the screw rod, a speed reducer connected with the speed reducer a stepper motor, a displacement sensor arranged on the reducer and a hand wheel for moving the position of the clamping device;

The axial load loading device includes a mounting beam, columns arranged on both sides below the mounting beam, an axial loading oil cylinder arranged on the installation beam, a load sensor arranged on the axial loading oil cylinder, a device A pressure bearing plate at the end of the axial loading cylinder that is in contact with the upper end surface of the soil sample box, and a displacement sensor disposed on the pressure bearing plate;

The console is used to set the stretching rate of the cross-shaped horizontal stretching device and the axial load of the axial load loading device; the data collector is used to collect horizontal tension and displacement data during the test, And can display the test process curve in real time.

Further, the soil sample box is located at the center of the main frame platform, including a lower soil sample box and an upper soil sample box, both of which are hollow rectangles with upper and lower openings The box body, the geosynthetic material sample is located between the lower soil sample box and the upper soil sample box.

Further, the dimensions of the lower soil sample box and the upper soil sample box are both 300mm×300mm.

Further, there are four sets of clamping devices, which are respectively located on the four sides of the soil sample box and are arranged in a symmetrical cross shape. The clamping devices include a fixed splint connected with the slider and a The fixed splint is a removable splint connected by bolts, and the test piece is clamped by the movable splint.

Further, there are four sets of the linear guide rail, the slide block, the screw rod, the reducer, the stepping motor, the hand wheel, the tension pressure sensor and the displacement sensor.

Further, the installation frame is arranged in a cross shape, and the cross-shaped horizontal stretching device is mated and connected with the installation frame.

Further, there are three groups of the main frame platforms, and the size and structural layout of the three groups of the main frame platforms are all the same, the lower end of the main frame platform at the bottom is provided with several support frames, and the shaft at the lower part The loading device can be fixed to the bottom end of the installation frame through the installation beam.

Further, the working range of the displacement sensor of the cross-shaped horizontal stretching device is 50mm-150mm, the working range of the displacement sensor of the axial load loading device is 15mm-25mm, and the working range of the load sensor is 30KN- 50KN, the working range of the tension pressure sensor is 80KN-120KN.

Further, the filler in the soil sample box is soil.

Further, the data collectors are all electrically connected to the displacement sensor of the cross-shaped horizontal stretching device, the displacement sensor of the axial load loading device, the load sensor and the tension pressure sensor, and can test During the data recording, the test process curve is displayed on the data acquisition computer on the console.

The beneficial effects of the geosynthetics tensile test device based on the soil medium provided by the present invention are: 1) bidirectional tension and axial loading tests are more in line with the stress of the geosynthetics in the soil body than traditional uniaxial tension tests The four sets of stepper motors of the cross-shaped horizontal stretching device can be set to different horizontal stretching ratio values, which can be adjusted freely and flexibly mastered;

2) On the basis of biaxial stretching, the combination of soil media constraints and normal loads is used to fully simulate the tensile deformation of geosynthetics under three-dimensional stress states at different buried depths. At the same time, the test data are real-time Records for qualitative and quantitative analysis;

3) The clamping device slides on the linear guide rail to ensure that the geosynthetic material sample is evenly stressed when stretched in the horizontal direction, reducing the test error, the applied tensile force conforms to the test specification, and the accuracy of the test data is high;

4) The size of the soil sample box is increased on the basis of meeting the requirements of the specification, which can reduce the influence of the equipment boundary effect and the sample size effect while realizing the constraint effect of the soil medium;

5) The horizontal force that can be applied is large, the deformation of the material is allowed to be large, and the axial load applied is large, so as to fully test the deformation performance of geosynthetics;

6) The three-story main frame platform is arranged with a compact structure, which can be tested simultaneously or separately, which is free and flexible, improves the test efficiency, solves the problem of equipment occupation, and meets the test accuracy requirements.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the descriptions of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only of the present invention. For some embodiments, those of ordinary skill in the art can also obtain other drawings based on these drawings without paying creative efforts.

Fig. 1 is the structural representation of the geosynthetics tensile test device based on soil medium provided by the embodiment of the present invention;

Fig. 2 is the top view of the geosynthetics tensile test device based on the soil medium provided by the embodiment of the present invention;

Fig. 3 is a schematic structural view of the console of the soil medium-based geosynthetics tensile test device provided by the embodiment of the present invention.

Among them, the reference signs in the figure: 1- main frame platform; 11- installation frame; 12- soil sample box; 121- lower soil sample box; 122- upper soil sample box; 13- cross-shaped horizontal stretching device; 131 -Clamping device; 1311-fixed splint; 1312-bolt; 1313-movable splint; 132-linear guide rail; 133-slider; 134-screw; 135-pull pressure sensor; ;138-displacement sensor; 139-handwheel; 14-axial load loading device; 141-installation beam; 142-column; 143-axial loading cylinder; 144-load sensor; ; 2-console; 3-support frame.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

It should be noted that when an element is referred to as being “fixed” or “disposed on” another element, it may be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

It is to be understood that the terms "length", "width", "top", "bottom", "front", "rear", "left", "right", "vertical", "horizontal", "top" , "bottom", "inner", "outer" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device Or elements must have a certain orientation, be constructed and operate in a certain orientation, and thus should not be construed as limiting the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, "plurality" and "several" mean two or more, unless otherwise specifically defined.

Please refer to Fig. 1 to Fig. 3 together, and now the tensile test device for geosynthetics based on soil medium provided by the present invention will be described. The geosynthetics tensile test device based on soil media includes a main frame platform 1 with more than two layers, a console 2 and a data collector connected to the main frame platform 1;

The main frame platform 1 includes an installation frame 11, a soil sample box 12 arranged on the installation frame 11 for accommodating fillers and installing test pieces, and four sides of the soil sample box 12 for sample testing. A cross-shaped horizontal stretching device 13 and an axial load loading device 14 positioned above the soil sample box 12;

The cross-shaped horizontal tensioning device 13 includes a clamping device 131 for clamping a test piece, a linear guide rail 132 fixed on the installation frame, and a clamping device 131 arranged on the linear guide rail 132 The slider 133 fixedly connected, the screw rod 134 connected with the clamping device 131 , the tension pressure sensor 135 between the clamping device 131 and the screw rod 134 , and the other end of the screw rod 134 A connected speed reducer 136, a stepper motor 137 connected with the speed reducer 136, a displacement sensor 138 arranged on the speed reducer 136 and a handwheel 139 for moving the position of the clamping device 131;

The axial load loading device 14 includes a mounting beam 141, columns 142 arranged on both sides below the mounting beam 141, an axial loading cylinder 143 arranged on the mounting beam 141, and an axial loading cylinder 143 arranged on the axial loading cylinder. The load sensor 144 on 143, the pressure bearing plate 145 arranged at the end of the axial loading cylinder 143 and in contact with the upper end surface of the soil sample box 12, and the displacement sensor 146 arranged on the pressure bearing plate 145;

The console 2 is used to set the stretching rate of the cross-shaped horizontal stretching device 13 and the axial load of the setting axial load loading device 14; the data collector is used to collect the horizontal pulling force and Displacement data, and can display the test process curve in real time.

Compared with the prior art, the geosynthetics tensile test device based on the soil medium provided by the present invention has a three-layer main frame platform 1, which can carry out three groups of tests on the geosynthetics at the same time, which improves the test accuracy and reduces the test error, and the main frame platform 1 of each layer includes a cross-shaped horizontal tension device 13 and an axial load loading device 14, which can perform three-dimensional tests on geosynthetic material specimens, and three-dimensional geosynthetic materials based on soil media The tensile test truly reflects the deformation performance of geosynthetics under the three-dimensional stress state of the soil medium, and at the same time improves the test accuracy, improves the test efficiency, and saves the technical effect of land occupation.

The main frame platform 1 of each group is connected with the data collector and the console 2 equipped with a data acquisition calculator. When performing a horizontal tensile test of geosynthetics, four sets of displacement sensors 138 and four sets of tension and pressure sensors 135 are used. The collected data information will be transmitted to the data acquisition computer in time, and the stress-strain relationship curve can be drawn according to the applied tensile stress, and displayed on the display screen of the data acquisition computer. It is also possible to control the driving forces of four sets of stepping motors 137 through the console 2, and different test data can be obtained by setting different driving forces. Repeat the test several times, or test simultaneously on three groups of main frame platforms 1, and obtain Three sets of test data in order to reasonably judge the true characteristic curve of geosynthetics based on soil media.

The main frame platform 1 is divided into upper, middle and lower floors. The three platforms are all square frame structures symmetrical to the specimen. The size and structural layout of each platform are the same. Three sets of tests can be carried out at the same time without interfering with each other. The three-layer main frame platform 1 forms a square frame structure overlapping up and down.

Further, please refer to Fig. 1 to Fig. 3 together, as a specific embodiment of the geosynthetics tensile test device based on the soil medium provided by the present invention, the soil sample box 12 is located on the main frame platform 1 center position, including the lower soil sample box 121 and the upper soil sample box 122, the lower soil sample box 121 and the upper soil sample box 122 are hollow rectangular boxes with upper and lower openings, and the geosynthetic material sample is located in the Between the lower soil sample box 121 and the upper soil sample box 122. The size of the pressure bearing plate 145 is slightly smaller than the cross-sectional size of the soil sample box 12, the lower soil sample box 121 and the upper soil sample box 122 are equal in size, both have openings on the upper and lower sides, and are filled with soil samples. Between the sample box 121 and the upper soil sample box 122, the tensile test of the geosynthetic material simulating the soil medium is satisfied.

Further, please refer to Fig. 1 to Fig. 3 together, as a specific implementation of the geosynthetics tensile test device based on the soil medium provided by the present invention, the lower soil sample box 121 and the upper soil sample box 121 The dimensions of the boxes 122 are each 300mm×300mm. The size of the soil sample box 12 can be calculated according to the size of the soil medium range in which the geosynthetic material is actually applied, after being reduced by a certain ratio, and then the simulated size of the soil sample box 12 is calculated.

Further, please refer to Fig. 1 to Fig. 3 together, as a specific embodiment of the geosynthetics tensile test device based on the soil medium provided by the present invention, the clamping devices 131 are four groups, respectively located in the The four sides of the soil sample box 12 are arranged in a symmetrical cross shape. The clamping device 131 includes a fixed splint 1311 connected to the slider 133 and a detachable splint 1311 connected to the fixed splint 1311 by bolts 1312. Movable splint 1313, the test piece is clamped by the movable splint 1313. There are three bolts 1312, the fixed splint 1311 can slide on the linear guide rail 132, the movable splint 1313 clamps the geosynthetic material, the movable splint 1313 is fixed on the fixed splint 1311 by three bolts 1312, and the bolt 1312 operates It is more flexible and disassembles smoothly.

Further, please refer to Fig. 1 to Fig. 3 together, as a specific embodiment of the geosynthetics tensile test device based on the soil medium provided by the present invention, the linear guide rail 132, the slider 133, the The screw rod 134, the speed reducer 136, the stepper motor 137, the hand wheel 139, the tension pressure sensor 135 and the displacement sensor 138 are all four groups. It realizes that the tensile test can be done in four directions of the geosynthetic material, and the test of the geosynthetic material based on the soil medium is reasonably simulated.

Further, please refer to FIG. 1 to FIG. 3 together. As a specific implementation of the soil medium-based geosynthetics tensile test device provided by the present invention, the installation frame 11 is arranged in a cross shape, and the ten The glyph horizontal stretching device 13 is matched with the installation frame 11 and connected. The installation frame 11 is a three-layer structure, all of which are arranged in a cross shape, and the cross-shaped horizontal tensile device 13 is fixed on it, mainly for horizontal tensile tests of geosynthetic materials; the axial load loading device 14 is located directly above the installation frame 11, Mainly do axial loading test of geosynthetics.

Further, please refer to Fig. 1 to Fig. 3 together, as a specific implementation of the geosynthetics tensile test device based on soil medium provided by the present invention, the main frame platform 1 is divided into three groups, and the three groups The size and structural arrangement of the main frame platform 1 are the same, the lower end of the main frame platform 1 at the lowermost part is provided with a number of support frames 3, and the axial load loading device 14 at the lower part can pass through the installation beam 3 It is fixed on the bottom end of the installation frame 11. The three-layer layout is compact in structure, easy to operate, improves the test efficiency, not only saves money, but also meets the requirements of test accuracy. It can also be set as four or more layers, preferably three layers. The more layers, the more test data, more accurate test results, and more in line with the three-dimensional stress-strain research of three-dimensional geosynthetics based on soil media.

Further, please refer to Fig. 1 to Fig. 3 together, as a specific implementation of the geosynthetics tensile test device based on the soil medium provided by the present invention, the displacement sensor 138 of the cross-shaped horizontal tensile device 13 The operating range of the axial load loading device 14 is 50mm-150mm, the operating range of the displacement sensor 146 of the axial load loading device 14 is 15mm-25mm, the operating range of the load sensor 144 is 30KN-50KN, and the operating range of the tension pressure sensor 135 It is 80KN-120KN. Within the scope of their respective sensors, they can all meet the tensile and axial loading simulation tests of geosynthetics based on soil media.

Further, please refer to FIG. 1 to FIG. 3 together. As a specific implementation of the soil medium-based geosynthetics tensile test device provided by the present invention, the filler in the soil sample box 12 is soil. The soil is filled with the upper soil sample box 122 and the lower soil sample box 121. In order to make the test data more accurate, the geosynthetics are tested in the soil medium, which is more in line with the tensile deformation under the three-dimensional stress state, and is also convenient. Qualitative and quantitative analysis.

Further, please refer to Figures 1 to 3 together, as a specific implementation of the soil medium-based geosynthetics tensile test device provided by the present invention, the data collectors are all connected to the cross-shaped horizontal tensile The displacement sensor 138 of the extension device 13, the displacement sensor 146 of the axial load loading device, the load sensor 144 and the tension pressure sensor 135 are electrically connected, and the data records in the test process can be recorded on the console. 2. The test process curve is displayed on the computer for data acquisition.

The specific process of the test is as follows: firstly, the lower soil sample box 121 of the soil sample box 12 is backfilled with soil samples in layers and compacted, and after the geosynthetic material is placed on the top of the lower soil sample box 121, four sets of clamping devices 131 are clamped. For geosynthetics, backfill soil samples in the upper soil sample box 122 and compact them, adjust the cross-shaped horizontal stretching device 13 of each layer, so that the geosynthetics is located in a suitable position in four directions, and the clamping device 131 is First adjust with the hand wheel 139, and then adjust precisely through the console 2, and make the geosynthetics in the initial stress state, set each sensor to zero state, put down the bearing plate 145 of the axial load loading device 14, and place it on the console 2 controls the parameters of each stepper motor 137 and axial loading cylinder 143, starts the power, each sensor starts to work and records the stress and strain information of the geosynthetic material, and transmits the data to the data acquisition computer of the console 2, and displays it as stress strain curve.

The beneficial effects of the geosynthetics tensile test device based on the soil medium provided by the present invention are: 1) bidirectional tension and axial loading tests are more in line with the stress of the geosynthetics in the soil body than traditional uniaxial tension tests situation, the four groups of stepper motors 137 of the cross-shaped horizontal stretching device 13 can be set to different horizontal stretching ratio values, which can be freely adjusted and flexibly grasped;

2) On the basis of biaxial stretching, the combination of soil media constraints and normal loads is used to fully simulate the tensile deformation of geosynthetics under three-dimensional stress states at different buried depths. At the same time, the test data are real-time Records for qualitative and quantitative analysis;

3) The clamping device slides on the linear guide rail to ensure that the geosynthetic material sample is evenly stressed when stretched in the horizontal direction, reducing the test error, the applied tensile force conforms to the test specification, and the accuracy of the test data is high;

4) The size of the soil sample box 12 is increased on the basis of meeting the specification requirements, which can reduce the influence of the equipment boundary effect and the sample size effect while realizing the constraint effect of the soil medium;

5) The horizontal force that can be applied is large, the deformation of the material is allowed to be large, and the axial load applied is large, so as to fully test the deformation performance of geosynthetics;

6) The three-story main frame platform 1 is arranged, which is compact in structure and can be tested simultaneously or separately. It is free and flexible, improves the test efficiency, solves the problem of equipment occupation, and meets the test accuracy requirements.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (10)

1. the geosynthetics tensile test apparatus based on soil medium, it is characterised in that：Including two layers or more of mainframe Platform, the console and data collector being connected with the host body panel；

The host body panel includes installation frame, be set on the installation frame for holding filler and installation test specimen Soil sample box for the cross horizontal stretch device of specimen test and is located at the soil sample box positioned at four side of soil sample box The xial feed loading device of side；

The cross horizontal stretch device includes clamping device for clamping test pieces, the line that is fixed on the installation frame Property guide rail, the sliding block being fixedly connected with the clamping device being arranged on the linear guides are connect with the clamping device Lead screw, the pull pressure sensor between the clamping device and the lead screw, connect with the other end of the lead screw Retarder, the stepper motor being connect with the retarder, the displacement sensor being arranged on the retarder and for moving State the handwheel of clamping device position；

The xial feed loading device includes installing crossbeam, the column for being set to the installation below the crossbeam both sides, being set to Axially loaded oil cylinder on the installation crossbeam, the load transducer being set on the axially loaded oil cylinder, be set to it is described The bearing plate of axially loaded oil cylinder end contacted with soil sample box upper surface, the displacement sensing being arranged on the bearing plate Device；

The console is used to set the rate of extension and setting xial feed loading device of the cross horizontal stretch device Xial feed；The data collector is used to acquire horizontal pull and displacement data during experiment, and can display real-time Test conditional curve.

2. the geosynthetics tensile test apparatus based on soil medium as described in claim 1, it is characterised in that：It is described Soil sample box is located at the center of the host body panel, including lower soil sample box and upper soil sample box, the lower soil sample box and described Upper soil sample box is the cavity rectangular box of upper and lower opening, and geosynthetics sample is located at the lower soil sample box and the soil loading Between sample box.

3. the geosynthetics tensile test apparatus based on soil medium as claimed in claim 2, it is characterised in that：It is described The size of lower soil sample box and the upper soil sample box is 300mm × 300mm.

4. the geosynthetics tensile test apparatus based on soil medium as described in claim 1, it is characterised in that：It is described Clamping device is four groups, is located at four sides of the soil sample box, is in symmetrical cross arrangement, the clamping device The ambulatory splint for including the strap being connect with the sliding block and being connect by Bolt dismantling formula with the strap, test specimen It is clamped by the ambulatory splint.

5. the geosynthetics tensile test apparatus based on soil medium as described in claim 1, it is characterised in that：It is described Linear guides, the sliding block, the lead screw, the retarder, the stepper motor, the handwheel, the pull pressure sensor And institute's displacement sensors are four groups.

6. the geosynthetics tensile test apparatus based on soil medium as described in claim 1, it is characterised in that：It is described Installation frame arranges that the cross horizontal stretch device is connected with the installation frame in cross.

7. the geosynthetics tensile test apparatus based on soil medium as described in claim 1, it is characterised in that：It is described Host body panel is three groups, and host body panel size described in three groups and structure arrange all same, are located at the master of lowest part The lower end of framework platform is equipped with several supporting racks, and the xial feed loading device for being located at lower part can be by installation cross Beam is fixed on the bottom end of the installation frame.

8. the geosynthetics tensile test apparatus based on soil medium as described in claim 1, it is characterised in that：It is described The sphere of action of the displacement sensor of cross horizontal stretch device is 50mm-150mm, the position of the xial feed loading device The sphere of action of displacement sensor is 15mm-25mm, and the sphere of action of the load transducer is 30KN-50KN, the pressure The sphere of action of sensor is 80KN-120KN.

9. the geosynthetics tensile test apparatus based on soil medium as described in claim 1, it is characterised in that：It is described Filler in soil sample box is the soil body.

10. the geosynthetics tensile test apparatus based on soil medium as described in claim 1, it is characterised in that：Institute State displacement of the data collector with the displacement sensor of the cross horizontal stretch device, the xial feed loading device Sensor, the load transducer and pull pressure sensor electrical connection, and can be by the data record during experiment, in institute It states and shows experiment conditional curve on the data acquisition computer on console.