Consolidation box with bending element and use method

Abstract

The invention belongs to the technical field of soil detection, and particularly relates to a consolidation box with bending elements and a using method.The device comprises a consolidation unit, the upper portion of the consolidation unit makes contact with a loading rod of a conventional consolidation apparatus, a soil sample is arranged in the consolidation unit, and the upper end and the lower end of the soil sample are each provided with a bending element piece; the bending element sheet is fixed in the consolidation unit through bending element fixing bolts, the bending element fixing bolts at the upper end and the lower end of the soil sample are respectively connected with a bending element transmitting end and a bending element receiving end, the bending element transmitting end is electrically connected with a signal exciter, and the bending element receiving end is electrically connected with an oscilloscope; and the signal exciter is electrically connected with the oscilloscope. The bending element is used for measuring the small strain stiffness of the soil body in the test process. The device not only reserves the function of a traditional consolidation box, but also improves the capacity of capturing the small strain characteristic of the soil body by introducing the bending element, so that more accurate data support is provided for engineering practice.

Description

Technical Field

[0001] The invention belongs to the technical field of soil detection, and in particular relates to a consolidation box with a bending element and a use method thereof. Background Art

[0002] Consolidation tests are commonly used in geotechnical engineering to study the settlement characteristics of soil under static loads. These test results are of great reference value for foundation design, soil stability analysis and settlement prediction. In addition, soil stiffness in the small strain range (small strain stiffness) is also crucial for the refined prediction of structural settlement and deformation, especially in foundation engineering and seismic analysis.

[0003] Traditional consolidation test equipment focuses more on the deformation characteristics of soil in a large strain range, while ignoring the stiffness test in a small strain range. However, soil is often in a small strain state in engineering practice, and the stiffness in this state is significantly different from its macroscopic deformation performance. Most of the current consolidation equipment does not have the ability to accurately test small strain stiffness, resulting in insufficient accuracy when simulating actual working conditions. In addition, some existing test methods often require separate stiffness tests, which increases the experimental steps and costs.

[0004] In view of the above problems, it is necessary to develop a consolidation test equipment that can integrate the small strain stiffness test function. This equipment should be based on the traditional consolidation test and realize the measurement of small strain stiffness by introducing special elements, making the test process more comprehensive and efficient. Summary of the invention

[0005] The purpose of the present invention is to provide a consolidation box with a bending element and a method of use, so as to solve the technical problem that the consolidation equipment in the prior art does not have the ability to accurately test small strain stiffness, resulting in insufficient accuracy when simulating actual working conditions.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: In the first aspect, the present invention discloses a consolidation box with a bending element, comprising: a consolidation unit, the top of the consolidation unit is in contact with a conventional consolidation instrument loading rod, a soil sample is arranged in the consolidation unit, bending element pieces are arranged at the upper and lower ends of the soil sample, the bending element pieces are fixed in the consolidation unit by bending element fixing bolts, the bending element fixing bolts at the upper and lower ends of the soil sample are respectively connected to the bending element transmitting end and the bending element receiving end, the bending element transmitting end is electrically connected to a signal exciter, and the bending element receiving end is electrically connected to an oscilloscope; the signal exciter is electrically connected to the oscilloscope.

[0007] Preferably, a small hole is opened in the center of the bending element fixing bolt, the bending element piece is fixed at the small hole in the center of the bending element fixing bolt, waterproof treatment is performed with epoxy resin, and the bending element piece extends into the soil sample by 2-3 mm.

[0008] Preferably, the length of the bottom ends of the bending element receiving end and the bending element transmitting end located inside the bending element fixing bolt does not exceed three quarters of their own length; the top ends of the bending element receiving end and the bending element transmitting end protrude 2-3mm from the bending element fixing bolt.

[0009] Preferably, the consolidation unit includes a saturation chamber, a base is provided at the bottom of the saturation chamber, and a wire fixing ring is provided on the outside of the base; a ring knife is provided on the base, and a soil sample is provided in a cavity formed by the ring knife and the base; a top cover is provided on the ring knife, and a pressure bearing plate is provided on the top cover, and the bending element fixing bolts at the upper and lower ends of the soil sample are respectively fixed on the top cover and the base.

[0010] Preferably, the saturation chamber is a cylindrical container with a bottom and no cover, and the wire fixing ring is placed at the bottom of the saturation chamber.

[0011] Preferably, a circular groove is opened at the bottom of the saturation chamber with the center as the circle point, and the diameter of the circular groove is the same as that of the wire fixing ring, which is used to position the wire fixing ring.

[0012] Preferably, the base is provided with a concave platform with the center as the center of the circle for positioning the ring knife; the top cover is provided with a concave platform for positioning the pressure bearing plate; and the top cover and the base are both provided with a plurality of symmetrical small holes.

[0013] Preferably, the top surface of the pressure receiving plate is provided with a concave platform for positioning the loading rod of a conventional consolidation instrument, and the bottom is provided with a convex platform adapted to the top cover.

[0014] In a second aspect, the present invention discloses a method for using a consolidation box with a bending element, comprising: Place the consolidation box containing the soil sample to be tested at the bottom of the loading frame of the conventional consolidation instrument; The conventional consolidation tester loads the load frame, completes the consolidation test, and records the consolidation curve; After each load level is stabilized, the signal is excited by the signal exciter; the bending element signal is displayed and recorded on the oscilloscope, and the shear wave velocity and shear modulus are calculated based on the recorded bending element signal; Under a fixed load, water is injected into the consolidation unit to a preset value, and the collapsibility coefficient of the soil sample under the load is obtained based on the change in soil sample height before and after immersion.

[0015] Preferably, the consolidation unit comprises a saturation chamber, a wire fixing ring, a base, a ring knife, a top cover and a pressure receiving plate; the method comprises: Place the consolidation box containing the soil sample to be tested at the bottom of the loading frame of the conventional consolidation instrument; The conventional consolidation tester loads the load frame, completes the consolidation test, and records the consolidation curve; After each load level is stabilized, the signal is excited by the signal exciter; the bending element signal is displayed and recorded on the oscilloscope, and the shear wave velocity and shear modulus are calculated based on the recorded bending element signal; Under a fixed load, water is poured into the saturated chamber until the top cover is submerged. The collapsible coefficient of the soil sample under this load is obtained based on the change in soil sample height before and after immersion.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The invention makes a plurality of holes in the top cover and the base respectively, so that the top cover and the base have the effect of permeable stone, which is convenient for discharging water in the pattern during the consolidation process.

[0017] Furthermore, since the consolidation process requires the loading rod to apply a vertical load to the sample, the process requires that the pressure plate, top cover, sample, and base be aligned so that the pressure can be applied evenly. Therefore, convex / concave platforms are set on the upper and lower sides of the pressure plate, the top surface of the top cover, and the top surface of the base to facilitate precise positioning of each part.

[0018] Furthermore, the top surface of the top cover is processed with four channels spaced 90 degrees apart. When docking and installing with the pressure bearing plate, the transmitting end wire of the bending element can be placed in the channel to prevent damage to the wire. Similarly, the bottom surface of the base also has a similar arrangement.

[0019] Furthermore, the contact surface between the wire fixing ring and the groove at the bottom of the saturation chamber is provided with four notches spaced 90 degrees apart to allow the wire at the receiving end of the bending element to pass through, and the notches can also fix the wire.

[0020] Furthermore, the transmitting / receiving end of the bending element is connected to the top cover / base through the bending element fixing bolts. Since the bending element pieces have certain wear and tear during use, the damaged bending element can be easily replaced through the bolt connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 It is a schematic diagram of the main part of a consolidation box with a bending element of the present invention; Figure 2 Schematic diagram of the fixing bolt of the bending element in the embodiment of the present invention; (a) is a top view; (b) is a main view; Figure 3 Schematic diagram of a base in an embodiment of the present invention; (a) is a top view; (b) is a main view; Figure 4 Schematic diagram of the top cover in an embodiment of the present invention; (a) is a top view; (b) is a main view; Figure 5 Schematic diagram of a pressure bearing plate in an embodiment of the present invention; (a) is a top view; (b) is a main view.

[0023] Among them: 1-saturation chamber, 2-conductor fixing ring, 3-base, 4-ring knife, 5-top cover, 6-pressure bearing plate, 7-bending element transmitting end, 8-bending element receiving end, 9-bending element fixing bolt, 10-bending element conductor. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0027] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0028] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0029] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] The present invention is further described in detail below in conjunction with the accompanying drawings: The present invention provides a consolidation box with a bending element, which is used to measure the small strain stiffness of soil during the test. The device not only retains the function of the traditional consolidation box, but also improves the ability to capture the small strain characteristics of the soil by introducing the bending element, thereby providing more accurate data support for engineering practice.

[0031] See also Figure 1 The present application discloses a consolidation box with a bending element, comprising: a consolidation unit, the top of the consolidation unit is in contact with a loading rod of a conventional consolidation instrument, a soil sample is arranged in the consolidation unit, and bending element pieces are arranged at the upper and lower ends of the soil sample, respectively, the bending element pieces are fixed in the consolidation unit by bending element fixing bolts 9, the bending element fixing bolts 9 at the upper and lower ends of the soil sample are respectively connected to the bending element transmitting end 7 and the bending element receiving end 8, the bending element transmitting end 7 is electrically connected to a signal exciter, and the bending element receiving end 8 is electrically connected to an oscilloscope; the signal exciter is electrically connected to the oscilloscope.

[0032] In some embodiments, a small hole is opened in the center of the bending element fixing bolt 9, and the bending element piece is fixed at the small hole in the center of the bending element fixing bolt 9. It is waterproofed by epoxy resin, and the small hole in the center of the bending element fixing bolt is filled with epoxy resin to fix the bending element piece. At the same time, the epoxy resin can protect the bending element conductor to avoid failure due to immersion in water; and the bending element piece extends into the soil sample by 2-3 mm.

[0033] In some embodiments, the length of the bottom ends of the bending element receiving end 8 and the bending element transmitting end 7 located inside the bending element fixing bolt 9 does not exceed three quarters of their own length; the top ends of the bending element receiving end 8 and the bending element transmitting end 7 protrude from the bending element fixing bolt 9 by 2-3 mm.

[0034] In some embodiments, the consolidation unit includes a saturation chamber 1, a base 3 is provided at the bottom of the saturation chamber 1, and a wire fixing ring 2 is provided on the outside of the base 3; a ring knife 4 is provided on the base 3, and a soil sample is provided in the cavity formed by the ring knife 4 and the base 3; a top cover 5 is provided on the ring knife 4, and a pressure bearing plate 6 is provided on the top cover 5, and the bending element fixing bolts 9 at the upper and lower ends of the soil sample are respectively fixed on the top cover 5 and the base 3.

[0035] In some embodiments, the saturation chamber 1 is a cylindrical container with a bottom but no cover, and the wire fixing ring 2 is placed at the bottom of the saturation chamber.

[0036] In some embodiments, a circular groove is opened at the center of the bottom of the saturation chamber 1 , and the diameter of the circular groove is the same as that of the wire fixing ring 2 , which is used to position the wire fixing ring 2 . The wire fixing ring 2 can position the base 3 .

[0037] In some embodiments, the base 3 is provided with a concave platform with the center as the center of the circle, which is used to position the ring cutter 4; the top cover 5 is provided with a concave platform for positioning the pressure bearing plate 6; the top cover 5 and the base 3 are provided with a plurality of symmetrical small holes. The top cover 5 and the base 3 are both made of nylon, and the base 3 is provided with a concave platform with the center as the center of the circle, and the size of the concave platform is slightly larger than the size of the conventional 40mm ring cutter.

[0038] In some embodiments, the top surface of the pressure receiving plate 6 has a concave platform for positioning the loading rod of a conventional consolidation instrument, and the bottom is provided with a convex platform to match the top cover 5.

[0039] In some embodiments, a consolidation box with a bending element includes a saturation chamber 1, a pressure bearing plate 6, a top cover 5, a base 3, a wire fixing ring 2, a bending element transmitting end 7, a bending element receiving end 8, a bending element fixing bolt 9, and a bending element wire 10; The saturation chamber 1 is a cylindrical container with a bottom and no cover, and the wire fixing ring 2 is placed at the bottom of the saturation chamber 1; The base 3 is placed at the bottom of the saturation chamber 1 and in the wire fixing ring 2; The top cover 5 is placed on the top of the soil sample; The pressure receiving plate 6 is placed above the top cover 5, with the top surface in contact with the loading rod of the conventional consolidation instrument and the bottom surface in contact with the top cover 5; A small hole is opened in the center of the bending element fixing bolt 9, and the bending element sheet is fixed to the small hole in the center of the bending element fixing bolt 9, and the bending element receiving end 8 protrudes from the top of the bending element fixing bolt 9; Threaded holes matching the bending element fixing bolts 9 are provided in the middle of the top cover 5 and the base 3. The bending element fixing bolts 9 with bending element sheets are connected to the base 3 and the top cover 5 through threads, wherein the bending element transmitting end 7 is connected to the top cover 5, and the bending element receiving end 8 is connected to the base 3.

[0040] In some embodiments, reference Figure 2The bending element piece is fixed in the bending element fixing bolt 9 and waterproofed by epoxy resin. The bending element fixing bolt 9 is connected to the base 3 and the top cover 5. The bolt connection method is convenient for replacement. The bending element receiving end 8 and the bending element transmitting end 7 protrude from the bending element fixing bolt 9 by about 3mm to ensure that the bending element piece extends into the soil sample by 2-3mm. While ensuring the measurement, the influence of the bending element transmitting end 7 and the bending element receiving end 8 on the soil can be minimized.

[0041] In some embodiments, reference Figure 3 The base 3 is placed at the bottom of the saturation chamber 1, the wire fixing ring 2 is placed outside the base, and the bottom is placed in the groove at the bottom of the saturation chamber 1 to play a positioning role. A plurality of small holes are opened in the center of the base 3 in a circular array mode to facilitate drainage during consolidation. The top surface of the base 3 has a concave platform to facilitate the placement of the ring knife 4 and the soil sample therein; there is a threaded hole in the center of the base 3, which is connected to the bending element fixing bolt 9, and the bending element receiving end 8 is connected to the base 3 through the bending element fixing bolt 9. There is a wire 10 channel at the bottom of the base 3. The wire 10 passes through the gap of the wire fixing ring 2 and is connected to the external oscilloscope.

[0042] In some embodiments, reference Figure 4 The top cover 5 is placed on the soil sample. A plurality of small holes are opened in a circular array pattern in the center of the top cover 3 to facilitate drainage during consolidation. A concave platform is provided on the top surface of the top cover 5 to facilitate the placement and positioning of the pressure bearing plate 6. A threaded hole is provided in the center of the bottom surface of the top cover 5, which is connected to the bending element fixing bolt 9. The bending element transmitting end 7 is connected to the top cover 5 through the bending element fixing bolt 9. A wire 10 channel is provided on the top surface of the top cover 5, and the wire 10 passes through the channel to be connected to an external signal exciter.

[0043] In some embodiments, reference Figure 5 The pressure receiving plate 6 has a boss at the bottom, which is connected to the top cover 5, and a concave platform at the top, which contacts the loading rod of the conventional consolidation instrument. The loading rod applies the load and transfers the load to the soil sample through the pressure receiving plate 6. The boss and the concave platform also play a positioning role to ensure the coaxiality of the load transfer.

[0044] The present invention also discloses a method for using a consolidation box with a bending element, comprising: Place the consolidation box containing the soil sample to be tested at the bottom of the loading frame of the conventional consolidation instrument; The conventional consolidation tester loads the load frame, completes the consolidation test, and records the consolidation curve; After each load level is stabilized, the signal is excited by the signal exciter; the bending element signal is displayed and recorded on the oscilloscope, and the shear wave velocity and shear modulus are calculated based on the recorded bending element signal; Under a fixed load, water is injected into the consolidation unit to a preset value, and the collapsibility coefficient of the soil sample under the load is obtained based on the change in soil sample height before and after immersion.

[0045] In some embodiments, the consolidation unit includes a saturation chamber 1, a wire fixing ring 2, a base 3, a ring knife 4, a top cover 5 and a pressure receiving plate 6; the method includes: Place the consolidation box containing the soil sample to be tested at the bottom of the loading frame of the conventional consolidation instrument; The conventional consolidation tester loads the load frame, completes the consolidation test, and records the consolidation curve; After each load level is stabilized, the signal is excited by the signal exciter; the bending element signal is displayed and recorded on the oscilloscope, and the shear wave velocity and shear modulus are calculated based on the recorded bending element signal; Under a fixed load, water is poured into the saturation chamber 1 until the top cover 5 is submerged. The collapsible coefficient of the soil sample under the load is obtained based on the height change of the soil sample before and after immersion in water.

[0046] In some embodiments, a consolidation box with a bending element includes a saturation chamber 1, a wire fixing ring 2, a base 3, a ring knife 4, a top cover 5, a pressure bearing plate 6, a bending element transmitting end 7, a bending element receiving end 8, a bending element fixing bolt 9 and a bending element wire 10.

[0047] The saturation chamber 1 is placed at the bottom of the conventional oedometer loading frame, the base 3 is placed at the bottom of the saturation chamber 1, the wire fixing ring 2 is placed outside the base 3 and embedded in the annular groove at the bottom of the saturation chamber 1, the ring knife 4 and the soil sample are placed on the top surface of the base, the top cover 5 is placed on the soil sample, and the pressure receiving plate 6 is placed in the concave platform on the top surface of the top cover 5. The top surface of the pressure receiving plate 6 is provided with a concave platform, which can be used to dock with the conventional oedometer loading rod to bear the load. Among them, the bending element transmitting end 7 and the bending element receiving end 8 are respectively connected to the top cover 5 and the base 3 through the bending element fixing bolts 9.

[0048] Directions: The method for testing the consolidation curve, collapsibility, shear wave velocity and shear modulus of a soil sample using the consolidation box with a bending element in the embodiment includes the following steps: 1) Connect the bending element transmitting end 7 and the bending element receiving end 8 to the top cover 5 and the base 3 respectively through the bending element fixing bolts 9.

[0049] 2) Prepare a sample of a certain size, place the soil sample wrapped by the ring knife 4 on the base 3, place the base 3 in the center of the saturation chamber 1, lead the wire 10 of the bending element receiving end 8 to the outside of the saturation chamber 1 through the reserved channel at the bottom of the base 3, place the wire fixing ring 2 in the annular groove at the bottom of the saturation chamber 1, and rotate the wire fixing ring 2 to make the wire 10 pass through one of the gaps at the bottom.

[0050] 3) Place the saturated chamber 1 with the base 3 and soil sample at the bottom of the conventional oedometer loading frame.

[0051] 4) Place the top cover 5 on the soil sample, making it concentric with the soil sample, and ensure that the bending element transmitting end 7 of the top cover 5 is horizontally aligned with the bending element receiving end 8 of the base 3. The wire of the bending element transmitting end 7 is led out from the reserved channel on the top surface of the top cover 5 to the outside of the saturation chamber.

[0052] 5) Place the bottom boss of the pressure receiving plate 6 in the concave platform of the top cover 5, and adjust the position of the saturation chamber 1 so that the consolidation box as a whole is aligned with the loading rod of the conventional consolidation instrument. The alignment standard is that the bottom end of the loading rod can completely penetrate into the top concave platform of the pressure receiving plate 6.

[0053] 6) Connect the wire of the bending element transmitting end 7 to the signal exciter, connect the bending element receiving end 8 to the oscilloscope, and connect the signal exciter to the oscilloscope. By exciting the signal through the signal exciter, the bending element signal can be observed on the oscilloscope screen.

[0054] 7) The load is applied through the loading frame, which is connected to the computer. The loading process is monitored in real time to complete the consolidation test.

[0055] 8) After each load level is stabilized, the bending element signal is excited and recorded once to complete the calculation of the shear wave velocity and shear modulus.

[0056] 9) Under a certain load level, fill the saturated chamber 1 with water until it covers the top cover 5. Observe the change in the height of the soil sample before and after immersion in water to obtain the collapsibility coefficient of the soil sample under the load.

[0057] It can be seen from the above scheme that the present invention has the following advantages: (A) The present invention integrates the configuration of the base and the ring knife in the traditional consolidation box into one by processing multiple small holes in the top cover and the base, making the sample loading process simpler. In addition, the top cover and the base are both made of nylon material, which is lighter while meeting the load requirements; (B) The present invention adopts multiple convex and concave platforms to facilitate positioning during sample loading, so that the load can be accurately transferred downward to the soil sample and the sample loading process is simplified; (C) The present invention uses bolts to connect the bending element with the top cover and the base. Since the bending element is relatively fragile and easily damaged during use, the present invention designs it as a movable part to facilitate replacement; (D) The present invention reserves wire channels on the top surface of the top cover and the bottom surface of the base to avoid damage to the bent element wires during loading.

[0058] (E) The scheme of the present invention is reasonable, the structure is clear, and it is easy to operate, and it can give full play to the advantages of the consolidation box.

[0059] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A consolidation box with a bending element, characterized in that: include: A consolidation unit, the top of which is in contact with a conventional consolidation instrument loading rod, a soil sample is arranged in the consolidation unit, and bending element sheets are arranged at the upper and lower ends of the soil sample respectively, the bending element sheets are fixed in the consolidation unit via bending element fixing bolts (9), the bending element fixing bolts (9) at the upper and lower ends of the soil sample are respectively connected to a bending element transmitting end (7) and a bending element receiving end (8), the bending element transmitting end (7) is electrically connected to a signal exciter, and the bending element receiving end (8) is electrically connected to an oscilloscope; the signal exciter is electrically connected to the oscilloscope.

2. A consolidation box with a bending element according to claim 1, characterized in that: A small hole is opened in the center of the bending element fixing bolt (9), and the bending element piece is fixed to the small hole in the center of the bending element fixing bolt (9), and waterproof treatment is performed by epoxy resin, and the bending element piece extends into the soil sample by 2-3 mm.

3. A consolidation box with a bending element according to claim 1, characterized in that: The bottom ends of the bending element receiving end (8) and the bending element emitting end (7) are located inside the bending element fixing bolt (9) for a length not exceeding three quarters of their own length; the top ends of the bending element receiving end (8) and the bending element emitting end (7) protrude from the bending element fixing bolt (9) by 2-3 mm.

4. A consolidation box with a bending element according to claim 1, characterized in that: The consolidation unit comprises a saturation chamber (1), wherein a base (3) is arranged at the bottom of the saturation chamber (1), and a wire fixing ring (2) is arranged outside the base (3); a ring knife (4) is arranged on the base (3), and a soil sample is arranged in a cavity formed by the ring knife (4) and the base (3); a top cover (5) is arranged on the ring knife (4), and a pressure receiving plate (6) is arranged on the top cover (5); and bending element fixing bolts (9) at the upper and lower ends of the soil sample are respectively fixed to the top cover (5) and the base (3).

5. A consolidation box with a bending element according to claim 4, characterized in that: The saturation chamber (1) is a cylindrical container with a bottom and no cover, and the wire fixing ring (2) is placed at the bottom of the saturation chamber.

6. A consolidation box with a bending element according to claim 4, characterized in that: The bottom of the saturation chamber (1) is provided with a circular groove with the center as a circle point, the diameter of the circular groove being the same as that of the wire fixing ring (2) and being used for positioning the wire fixing ring (2).

7. A consolidation box with a bending element according to claim 4, characterized in that: The base (3) is provided with a concave platform with the center as the center of the circle, which is used to position the ring knife (4); the top cover (5) is provided with a concave platform, which is used to position the pressure receiving plate (6); and the top cover (5) and the base (3) are both provided with a plurality of symmetrical small holes.

8. A consolidation box with a bending element according to claim 4, characterized in that: The top surface of the pressure receiving plate (6) is provided with a concave platform for positioning the loading rod of a conventional consolidation instrument, and the bottom is provided with a convex platform adapted to the top cover (5).

9. A method for using the consolidation box with a bending element according to any one of claims 1 to 8, characterized in that: include: Place the consolidation box containing the soil sample to be tested at the bottom of the loading frame of the conventional consolidation instrument; The conventional consolidation tester loads the load frame, completes the consolidation test, and records the consolidation curve; After each load level is stabilized, the signal is excited by the signal exciter; the bending element signal is displayed and recorded on the oscilloscope, and the shear wave velocity and shear modulus are calculated based on the recorded bending element signal; Under a fixed load, water is injected into the consolidation unit to a preset value, and the collapsibility coefficient of the soil sample under the load is obtained based on the change in soil sample height before and after immersion.

10. The method for using a consolidation box with a bending element according to claim 9, characterized in that: The consolidation unit comprises a saturation chamber (1), a wire fixing ring (2), a base (3), a ring knife (4), a top cover (5) and a pressure receiving plate (6); the method comprises: Place the consolidation box containing the soil sample to be tested at the bottom of the loading frame of the conventional consolidation instrument; The conventional consolidation tester loads the load frame, completes the consolidation test, and records the consolidation curve; After each load level is stabilized, the signal is excited by the signal exciter; the bending element signal is displayed and recorded on the oscilloscope, and the shear wave velocity and shear modulus are calculated based on the recorded bending element signal; Under a fixed load, water is poured into the saturation chamber (1) until the top cover (5) is submerged, and the collapsible coefficient of the soil sample under the load is obtained based on the change in the height of the soil sample before and after immersion in water.

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