Self-standing reinforced rubber membrane for circulating single shear test and manufacturing and sample loading method thereof

Abstract

The invention discloses a self-standing reinforced rubber membrane for a circulating single shear test, which comprises a base fixed on a circulating single shear apparatus, the center of the base is provided with a lower pressure plate of which the upper surface is provided with a raised needle surface, and the outer side of the lower pressure plate is sleeved with an inner-layer rubber membrane and an outer-layer rubber membrane which are used for loading a test soil sample. A spiral integrated metal wire capable of enabling a loaded test soil sample to be in a self-standing state is embedded in the inner and outer double-layer rubber membrane, and an upper pressure plate with a raised needle surface on the lower surface is arranged on the inner side of the inner and outer double-layer rubber membrane and above the loaded test soil sample; all circles of metal wires of the spiral integrated metal wire are tightly attached to one another, the metal ring located at the lowest end is flush with the protruding needle face on the lower pressing disc, and the metal ring located at the topmost end is flush with the protruding needle face on the lower surface of the upper pressing disc. The device has the beneficial effects that a test soil sample can be directly loaded on the circulating simple shear apparatus, interference generated when the soil sample moves is avoided, the uniformity is better, and the test result is more accurate.

Description

Technical Field

[0001] The invention relates to a cyclic single shear test device for indoor test of dynamic characteristic parameters of rock and soil materials, in particular to a self-supporting reinforced rubber membrane for cyclic single shear test and a manufacturing and sample loading method thereof. Background Art

[0002] Under the action of dynamic loads such as earthquakes, traffic and waves, the soil in the engineering foundation is usually subjected to additional stress in the pure shear state and the rotation of the principal stress axis. The cyclic simple shear test can effectively simulate the repeated shear load during the vertical propagation of earthquake shear waves. The test results can truly reflect the stress and deformation state of the soil sample under the action of earthquake loads. Therefore, the cyclic simple shear test is widely used in the change process of stress, strain and pore water pressure of saturated soil under dynamic stress, and determines the dynamic shear modulus, damping ratio and dynamic strength of the soil sample. Dynamic parameters such as indoor test determination.

[0003] The cyclic simple shear apparatus is mainly divided into rigid boundary type simple shear apparatus and non-rigid boundary type simple shear apparatus according to the constraint method of the specimen. The rigid boundary type simple shear apparatus developed by the University of Cambridge in the United Kingdom adopts a rigid vertical boundary and a rectangular sample box. The shear strain is loaded through the side boundary, and the upper and lower boundaries are moved. The side boundary hinged with the upper and lower boundaries will automatically circulate, thereby loading the strain on the specimen. However, during the test, the contact relationship and boundary conditions between the four rigid plates of the rigid boundary are difficult to maintain stability. At the same time, there is also the influence of friction between the side panel and the soil sample, which can easily affect the test results.

[0004] The sample container of the non-rigid single shear apparatus developed by the Norwegian Geotechnical Institute is cylindrical. Stress or strain is loaded by moving the upper or lower boundary. The lateral constraints of the non-rigid boundary single shear apparatus are mostly limited by stacked thin rings. The specific operation is: the soil sample to be tested is loaded into a rubber film stretched by a split mold. After the loading is completed, the split mold is removed, the sample is moved to the instrument shear box, and multiple layers of metal rings are stacked on the outside of the rubber film to limit the lateral deformation of the sample during the shear process. This method requires sample preparation outside the instrument. After the sample preparation is completed, the sample will be disturbed during the movement process. In addition, during the cyclic shear process, there are disadvantages such as lateral deformation of the sample between the stacked rings, potential shear surfaces at the stacked ring positions, and uneven shear stress and shear strain. Summary of the invention

[0005] Purpose of the invention: The purpose of the present invention is to provide a self-supporting reinforced rubber membrane for cyclic single shear test, which can prepare specimens directly in a shear box and exempt the specimens from secondary disturbances such as movement and installation after the specimen is completed.

[0006] Technical solution: The self-supporting reinforced rubber membrane for cyclic simple shear test described in the present invention includes a base fixed on the cyclic simple shear instrument, a lower pressure plate with a raised needle surface on the upper surface is provided in the center of the base, the outer side of the lower pressure plate is sleeved with inner and outer double-layer rubber membranes for loading test soil samples, the inner part of the inner and outer double-layer rubber membranes is embedded with a spiral one-piece metal wire that can make the loaded test soil sample in a self-supporting state, and an upper pressure plate with a raised needle surface on the lower surface is provided above the test soil sample on the inner side of the inner and outer double-layer rubber membranes after loading is completed, the metal wires of the spiral one-piece metal wire are tightly attached to each other and the metal ring at the lowest end is flush with the raised needle surface on the lower pressure plate, and the metal ring at the top is flush with the raised needle surface on the lower surface of the upper pressure plate.

[0007] Preferably, the diameter of the metal wire in the spiral one-piece metal wire is 0.2 mm, and the total height of the metal wire stack formed by the spiral one-piece metal wire is 30 mm.

[0008] Preferably, in order to maintain the continuity of the test soil sample, the upper pressure plate and the lower pressure plate are both disc-shaped, and the needle surfaces of the lower surface of the upper pressure plate and the upper surface of the lower pressure plate are evenly distributed.

[0009] Preferably, in order to fix the lower pressure plate, the outer surfaces of the inner and outer double-layer rubber membranes at the upper and lower ends of the lower pressure plate are respectively sleeved with two lower rubber rings for fixing the lower pressure plate.

[0010] Preferably, in order to fix the upper pressure plate, the outer surfaces of the inner and outer double-layer rubber membranes at the upper and lower ends of the upper pressure plate are respectively sleeved with two upper rubber rings for fixing the upper pressure plate.

[0011] Preferably, in order to offset the deadweight of the upper pressure plate and avoid squeezing the test soil sample, a nut hole capable of being connected to the cyclic simple shear apparatus is provided at the center of the upper surface of the upper pressure plate.

[0012] Preferably, the inner and outer double-layer rubber membranes with the spiral integrated metal wire embedded therein are in the shape of a hollow cylinder.

[0013] Preferably, the base is in the shape of a rectangular parallelepiped and is fixed to the cyclic simple shear apparatus by screws.

[0014] A method for manufacturing a self-supporting reinforced rubber membrane for a cyclic single shear test comprises the following steps:

[0015] (a) tightly winding the metal wires in the spiral integrated metal wire around a sleeve of a specified diameter to form a spiral metal wire stack with a total height of 30 mm;

[0016] (b) closing the two halves of the outer mold and clamping them into the outer mold grooves of the mold base, and fixing the two halves of the outer mold with a clamp;

[0017] (c) moving the spiral wire stack ring into the inner side of the outer mold and fixing it by a buckle arranged on the inner side of the outer mold;

[0018] (d) inserting the inner mold into the inner mold groove of the mold base, so that a hollow space for filling the latex liquid is formed between the inner mold and the outer mold;

[0019] (e) slowly pouring the prepared latex solution into the hollow space, and tapping the outer wall of the outer mold with a rubber hammer to completely discharge the air in the mold as the latex solution is poured in. After the casting is completed, the mold is placed in a dry and ventilated place for natural hardening for 12 hours;

[0020] (f) After the mold is naturally cured, demoulding is performed, and the prototype of the self-supporting reinforced rubber membrane obtained by demoulding is further dried and cured.

[0021] A method for loading a sample of a self-supporting reinforced rubber membrane for a cyclic single shear test comprises the following steps:

[0022] (S1) Fix the base in the shear box of the cyclic single shear apparatus by fixing screws, and install the lower pressure plate on the base;

[0023] (S2) placing an inner and outer double-layer rubber membrane with a spiral integrated metal wire embedded therein on the lower pressure plate, and adjusting the height of the inner and outer double-layer rubber membrane so that the metal ring at the lowest end of the inner and outer double-layer rubber membrane is flush with the raised needle surface on the upper surface of the lower pressure plate, and using two lower rubber rings to cover the surface of the inner and outer double-layer rubber membrane to fix it to the lower pressure plate;

[0024] (S3) placing the test soil sample into the inner and outer double-layer rubber membranes according to the desired sampling method, so that the height of the soil sample after the sampling is completed is consistent with the height of the top metal ring of the spiral integrated metal wire;

[0025] (S4) Fix the vertical loading rod on the cyclic simple shear apparatus to the upper pressure plate, and insert the upper pressure plate into the inner side of the inner and outer double-layer rubber membranes to cover the top of the test soil sample, so that the upper pressure plate is in full contact with the top of the test soil sample and does not squeeze the soil sample, and then put two upper rubber rings on the outer surface of the inner and outer double-layer rubber membranes to fix them to the upper pressure plate;

[0026] (S5) A cyclic shear test is performed on the sample by controlling the servo system of the cyclic single shear tester main device.

[0027] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: (1) The present invention is carried out entirely on a cyclic single shear instrument, which reduces the disturbance caused by the sample preparation outside the instrument during the movement and installation into the shear box, thereby improving the uniformity of the sample and increasing the repeatability of the test results; (2) It avoids the shortcomings of the sample loading device during the shearing process, such as lateral deformation of the sample between the stacked rings and the existence of potential shear surfaces at the stacked rings; (3) The self-supporting reinforced rubber membrane provided by the present invention can stand upright after being fixed to the base, eliminating the need for cumbersome tools such as split molds and vacuum systems in the existing rubber membrane sample forming process, and is simpler to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the present invention;

[0029] Figure 2 It is a schematic diagram of the molded structure in the manufacturing method of the present invention;

[0030] Figure 3 It is a cross-sectional view of the outer mold in the manufacturing method of the present invention;

[0031] Figure 4 A top view of the outer mold in the manufacturing method of the present invention;

[0032] Figure 5 It is a cross-sectional view of a molded base in the manufacturing method of the present invention;

[0033] Figure 6 The figure is a schematic diagram of the structure of the cyclic single shearing instrument used in the present invention. DETAILED DESCRIPTION

[0034] The technical solution of the present invention is further described below in conjunction with the accompanying drawings.

[0035] As shown in the figure, the present invention provides a self-supporting reinforced rubber membrane for cyclic single shear test, including inner and outer double-layer rubber membranes 1, spiral integrated metal wire 2, upper rubber ring 3, lower rubber ring 4, upper pressure plate 5, lower pressure plate 6 and base 7. The self-supporting reinforced rubber membrane is in the shape of a hollow cylinder, including inner and outer two layers of thin rubber membranes, and a fine metal wire ring is sandwiched between the two layers of membranes. The metal wire is tightly fitted in a spiral shape to finally form a spiral metal wire stack ring, and is embedded in the middle of the inner and outer two layers of thin rubber membranes to form a skeleton structure of the self-supporting reinforced rubber membrane of the present invention, so that the rubber membrane after loading is in a state of being able to stand upright independently. The inner and outer two layers of thin rubber membranes of the self-supporting reinforced rubber membrane of the present invention are an integrated structure in the part without the fine metal wire ring, which ensures the integrity of the self-supporting reinforced rubber membrane of the present invention. The body makes the embedded fine steel wire ring in a closed state to avoid corrosion caused by contact with water, air, etc. during use and reduce its service life. The metal wire ring is a stainless steel ring with a diameter of 0.2mm; the total height of the spiral metal wire stack ring is 30mm. The center of the base 7 is provided with a lower pressure plate 6 with a raised needle surface on the upper surface, and the outer side of the lower pressure plate 6 is provided with an inner and outer double-layer rubber membrane 1 for loading the test soil sample. After the loading is completed, an upper pressure plate 5 with a raised needle surface on the lower surface is provided on the inner side of the inner and outer double-layer rubber membrane 1 above the test soil sample. The metal wires of each circle of the spiral integrated metal wire 2 are tightly attached to each other and the metal circle at the lowest end is flush with the raised needle surface on the lower pressure plate 6, and the metal wire circle at the top is flush with the raised needle surface on the lower surface of the upper pressure plate 5.

[0036] A method for manufacturing a self-supporting reinforced rubber membrane for a cyclic single shear test comprises the following steps:

[0037] (a) The metal wires in the spiral integrated metal wire 2 are tightly wound around a sleeve of a specified diameter to form a spiral metal wire stack ring 104 with a total height of 30 mm;

[0038] (b) closing the two halves of the outer mold 102 and clamping them into the outer mold groove 107 of the mold base 101, and fixing the two halves of the outer mold with a clamp;

[0039] (c) moving the spiral wire stack ring 104 into the inner side of the outer mold 102 and fixing it by means of the buckle 106 disposed on the inner side of the outer mold 102;

[0040] (d) inserting the inner mold 103 into the inner mold groove 108 of the mold base 101, so that a hollow space 105 for filling with latex is formed between the inner mold 103 and the outer mold 102;

[0041] (e) slowly pouring the prepared latex solution into the hollow space 105, and tapping the outer wall of the outer mold 102 with a rubber hammer to completely discharge the air in the mold as the latex solution is poured in. After the casting is completed, place it in a dry and ventilated place for natural hardening treatment for 12 hours;

[0042] (f) After the mold is naturally cured, demoulding is performed, and the prototype of the self-supporting reinforced rubber membrane obtained by demoulding is further dried and cured.

[0043] Among them, when making latex solution, first select natural or synthetic polymer substances (such as natural rubber, silicone rubber, etc.) of suitable quality and pure and pollution-free; then pour the latex into a clean container, slowly add stabilizer and plasticizer, and stir evenly with a stirring rod during this process; finally, add an appropriate amount of solvent to the above solution to dissolve the material.

[0044] A method for loading a sample of a self-supporting reinforced rubber membrane for a cyclic single shear test comprises the following steps:

[0045] (S1) Fix the base 7 in the shear box 8 of the cyclic single shear instrument through the base screws 15, and install the lower pressure plate 6 on the base 7;

[0046] (S2) The inner and outer double-layer rubber membrane 1 with the spiral integrated metal wire 2 embedded therein is placed on the lower pressure plate 6, and the height of the inner and outer double-layer rubber membrane 1 is adjusted so that the metal ring at the lowest end of the inner and outer double-layer rubber membrane 1 is flush with the needle surface of the convex test on the upper surface of the lower pressure plate 6, and two lower rubber rings 4 are placed on the surface of the inner and outer double-layer rubber membrane 1 to fix it to the lower pressure plate 6;

[0047] (S3) loading the soil sample into the inner and outer double-layer rubber membrane 1 according to the desired sampling method, so that the height of the soil sample after the sampling is completed is consistent with the height of the top metal ring of the spiral integrated metal wire 2;

[0048] (S4) The vertical loading rod 11 on the cyclic single shear instrument passing through the mechanical arm 10 is fixed to the upper pressure plate 5 through the nut hole 16 on the upper pressure plate 5, and the upper pressure plate 5 is inserted into the inner side of the inner and outer double-layer rubber membranes 1 to cover the top of the test soil sample, so that the upper pressure plate 5 is completely in contact with the top of the test soil sample and does not squeeze the soil sample, and then the two upper rubber rings 3 are put on the outer surface of the inner and outer double-layer rubber membranes 1 to fix them to the upper pressure plate 5;

[0049] (S5) The vertical displacement meter 11 is placed, and the cyclic shear test is carried out on the sample by controlling the servo system 9 through the cyclic single shear tester main device 13.

[0050] The test soil samples can be remolded sandy soil and in-situ clay soil. The remolded sandy soil samples can be selected according to their maximum e max , minimum e minPorosity ratio, and specific gravity G s , and control the relative density D as needed r and the sample volume V, through the formula M = (Gs / (1+e max -D r (e max -e min ))) Calculate the mass M of dry sand required for one test. Dry sand loading can be carried out according to the layered vibration method, that is, the amount of dry sand m in each layer is calculated according to the total mass M of dry sand and the number of layers, and the amount of dry sand in one layer is poured into the reinforced rubber membrane. The sand sample reaches the specified height by knocking on the outer edge of the reinforced rubber membrane. Further, repeat the above operation until all the dry sand in one test is completely loaded into the reinforced rubber membrane, the surface of the dry sand is leveled, and the height of the sand sample after the sample is formed is consistent with the top height of the metal wire ring. In the simulated undrained test conditions, the single shear cycler automatically adjusts the size of the axial force to ensure that the sample volume remains unchanged during the test. The change in the axial force is the size of the pore water pressure of the sample. Therefore, the dry sand after the sample is prepared can be directly used for the test without further saturation. The in-situ clay soil can be cut into a cylindrical shape with a certain diameter and height by a soil divider to ensure that it can be loaded into the reinforced rubber membrane and fit tightly inside the reinforced rubber membrane, and its height is consistent with the top height of the metal wire ring.

[0051] For example, when conducting a single shear test, first confirm that the cyclic single shear instrument is in a normal power-on working state, check that all parts of the equipment are intact, then slowly lift the mechanical arm 10 to put it in an open state, put the base 7 into the shear box 8, and use four base screws 15 to completely fix the base 7 in the shear box 8, install the lower pressure plate 6 on the base 7, and put the self-supporting reinforced rubber film sample forming device 14 of the present invention on the outside of the lower pressure plate 6. Adjust the position and height of the self-supporting reinforced rubber film sample forming device 14 so that the thin wire ring at the bottom is flush with the raised needle surface of the lower pressure plate 6, use two rubber rings 4 to put on the outside of the reinforced rubber membrane, fix the reinforced rubber membrane 14 to the lower pressure plate 6, and then tighten the rubber ring 14. For remolding sandy soil, the calculated dry sand can be loaded into the reinforced rubber membrane by layered vibration. After the last layer of dry sand is loaded, the surface of the dry sand is leveled to make it flush with the top of the metal wire ring. The layered vibration method is to divide the total mass M of the dry sand into three parts, each of which is 1 / 3 of the total mass. The first part of the dry sand is loaded into the self-supporting reinforced rubber membrane, and the lower pressure plate 6 is gently tapped with a small wooden stick to make the dry sand reach 1 / 3 of the total height of the metal wire ring. After completion, continue to cycle the above steps until three parts of dry sand are loaded into the self-supporting reinforced rubber membrane, and the upper surface of the sample is arranged to make it flush with the top of the metal wire ring. The total mass M of the dry sand can be controlled according to the relative density D r and the volume of the sample V, and the maximum porosity ratio e of the dry sand max , minimum porosity ratio emin , and specific gravity G s According to the formula M = (Gs / (1+e max -D r (e max -e min The volume V of the sample can be calculated by measuring the inner diameter d of the reinforced rubber membrane and the total height h of the metal wire ring, using the formula V = π*d 2 *h / 4 can be calculated; the maximum porosity ratio e max It refers to the porosity of dry sand in the loosest state, which can be obtained by the long-necked funnel method; the minimum porosity e min It refers to the porosity ratio of dry sand in the most dense state, which can be obtained by the hammer-vibrating metal cylinder method; the specific gravity Gs is the specific gravity of the mass of the soil sample when it is dried to constant weight at 105°C ~ 110°C and the mass of the same volume of 4°C distilled water, which can be obtained by the specific gravity bottle method. For in-situ clay soil: use a soil cutter to cut it into a diameter d and height h corresponding to the inner diameter d of the reinforced rubber membrane and the total height h of the fine steel wire ring, and then carefully load the cut and intact sample into the self-supporting reinforced rubber membrane sampling device 14. After the sample loading is completed, the upper pressure plate 5 is slowly inserted into the upper side of the reinforced rubber membrane and covered on top of the soil sample to ensure that the upper pressure plate is in full contact with the upper part of the soil sample but not squeezed, and two rubber rings are put on the outside of the reinforced rubber membrane to make it fit and fix it completely with the upper pressure plate. At this time, the axial and radial directions of the sample are completely restricted and will not deform. The mechanical arm 10 is slowly lowered, and the vertical loading rod 11 is inserted into the loading hole of the mechanical arm 10 and then into the nut hole 16 of the upper platen 5. The loading rod 11 is rotated to be screwed into the nut hole 16 and fixed to the upper platen 5. The support system 18 is locked to the upper end of the vertical loading rod 11, and the upper part of the vertical loading rod 11 is fixed to the vertical load applying device 17. Then, the vertical displacement meter 12 is placed on the upper end of the support system 18. At this time, the entire system sample preparation is completed, and the test can be carried out after the test parameters are set through the control system.

[0052] The entire sample preparation process is carried out on the cyclic shear instrument. After the sample preparation is completed, the test can be carried out directly without moving the sample a second time, avoiding the secondary disturbance of the sample caused by the sample preparation outside the instrument. In addition, for remolded sandy soil, under the condition of cyclic undrained test, the system ensures that the test volume remains unchanged during the test by changing the vertical stress. The change value of the vertical stress corresponds to the size of the pore water pressure. Therefore, the sample does not need to be saturated and the test can be carried out in a dry state. For in-situ clay soil, its initial moisture content can be obtained by taking samples and measuring the moisture content at the same time as sample preparation.

Claims

1. A self-supporting reinforced rubber membrane for cyclic single shear test, characterized in that: The invention comprises a base (7) fixed on a cyclic simple shear apparatus, wherein a lower pressure plate (6) having a raised needle surface on the upper surface is provided in the center of the base (7), an inner and outer double-layer rubber membrane (1) for loading a test soil sample is provided on the outer side of the lower pressure plate (6), a spiral one-piece metal wire (2) capable of making the loaded test soil sample in a self-supporting state is embedded in the inner side of the inner and outer double-layer rubber membrane (1), an upper pressure plate (5) having a raised needle surface on the lower surface is provided on the inner side of the inner and outer double-layer rubber membrane (1) above the test soil sample after loading, each circle of the spiral one-piece metal wire (2) is tightly attached to each other, and the metal circle at the lowest end is flush with the raised needle surface on the lower pressure plate (6), and the metal circle at the top end is flush with the raised needle surface on the lower surface of the upper pressure plate (5).

2. A self-supporting reinforced rubber membrane for cyclic single shear test according to claim 1, characterized in that: The diameter of the metal wire in the spiral one-piece metal wire (2) is 0.2 mm, and the total height of the metal wire stack formed by the spiral one-piece metal wire (2) is 30 mm.

3. The self-supporting reinforced rubber membrane for cyclic single shear test according to claim 1, characterized in that: The upper pressing plate (5) and the lower pressing plate (6) are both disc-shaped, and the needle surfaces on the lower surface of the upper pressing plate (5) and the upper surface of the lower pressing plate (6) are evenly distributed.

4. The self-supporting reinforced rubber membrane for cyclic single shear test according to claim 1, characterized in that: The outer surfaces of the inner and outer double-layer rubber membranes (1) located at the upper and lower ends of the lower pressure plate (6) are respectively sleeved with two lower rubber rings (4) for fixing the lower pressure plate (6).

5. The self-supporting reinforced rubber membrane for cyclic single shear test according to claim 1, characterized in that: The outer surfaces of the inner and outer double-layer rubber membranes (1) located at the upper and lower ends of the upper pressure plate (5) are respectively sleeved with two upper rubber rings (3) for fixing the upper pressure plate (5).

6. The self-supporting reinforced rubber membrane for cyclic single shear test according to claim 1, characterized in that: A nut hole (16) capable of being connected to a cyclic single shear instrument is provided at the center of the upper surface of the upper pressure plate (5).

7. The self-supporting reinforced rubber membrane for cyclic single shear test according to claim 1, characterized in that: The inner and outer double-layer rubber membrane (1) with the spiral integrated metal wire (2) embedded inside is in the shape of a hollow cylinder.

8. The self-supporting reinforced rubber membrane for cyclic single shear test according to claim 1, characterized in that: The base (7) is in the shape of a rectangular parallelepiped and is fixed to the cyclic simple shear apparatus via base screws (15).

9. A method for manufacturing a self-supporting reinforced rubber membrane for a cyclic single shear test, based on the self-supporting reinforced rubber membrane for a cyclic single shear test according to claims 1-8, characterized in that: The following steps are involved: (a) tightly winding the metal wires in the spiral integrated metal wire (2) around a sleeve of a specified diameter to form a spiral metal wire stack (104) with a total height of 30 mm; (b) closing the two half molds of the outer mold (102) and clamping them into the outer mold groove (107) of the mold base (101), and fixing and tightening the two half outer molds with a clamp; (c) moving the spiral wire stack (104) into the inner side of the outer mold (102) and fixing it by means of a buckle (106) disposed on the inner side of the outer mold (102); (d) inserting the inner mold (103) into the inner mold groove (108) of the mold base (101), so that a hollow space (105) for filling with latex is formed between the inner mold (103) and the outer mold (102); (e) slowly pouring the prepared latex solution into the hollow space (105), and tapping the outer wall of the outer mold (102) with a rubber hammer to completely discharge the air in the mold as the latex solution is poured in. After the casting is completed, place it in a dry and ventilated place for natural hardening for 12 hours; (f) After the mold is naturally cured, demoulding is performed, and the prototype of the self-supporting reinforced rubber membrane obtained by demoulding is further dried and cured.

10. A method for loading a sample of a self-supporting reinforced rubber membrane for a cyclic simple shear test, based on the self-supporting reinforced rubber membrane for a cyclic simple shear test according to claims 1 to 8, characterized in that: The following steps are involved: (S1) Fixing the base (7) in the shear box (8) of the cyclic single shear apparatus by fixing screws, and installing the lower pressure plate (6) on the base (7); (S2) The inner and outer double-layer rubber membrane (1) with the spiral integrated metal wire (2) embedded therein is placed on the lower pressure plate (6), and the height of the inner and outer double-layer rubber membrane (1) is adjusted so that the metal ring at the lowest end of the inner and outer double-layer rubber membrane (1) is flush with the raised needle surface on the upper surface of the lower pressure plate (6), and two lower rubber rings (4) are placed on the surface of the inner and outer double-layer rubber membrane (1) to fix it to the lower pressure plate (6); (S3) placing the test soil sample into the inner and outer double-layer rubber membranes (1) according to the required sampling method, so that the height of the soil sample after the sampling is completed is consistent with the height of the top metal ring of the spiral integrated metal wire (2); (S4) The vertical loading rod (11) on the cyclic simple shear apparatus is fixed to the upper pressure plate (5), and the upper pressure plate (5) is inserted into the inner side of the inner and outer double-layer rubber membranes (1) to cover the top of the test soil sample, so that the upper pressure plate (5) is in full contact with the top of the test soil sample and does not squeeze the soil sample, and then two upper rubber rings (3) are put on the outer surface of the inner and outer double-layer rubber membranes (1) to fix them to the upper pressure plate (5); (S5) Controlling the servo system (9) through the cyclic single shear tester main device (13) to carry out a cyclic shear test on the sample.

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