A model box for vibration test of a stepped reinforced soil retaining wall

Abstract

The application discloses a model box for vibration test of a stepped reinforced soil retaining wall and belongs to the technical field of vibration test model boxes, which comprises a bottom plate, a side plate detachably installed on the bottom plate, a plurality of U-shaped plates slidably installed on the side plate, two arms of the U-shaped plate slidably installed on two opposite side walls of the side plate, a stepped cavity formed by splicing the plurality of U-shaped plates and the side plate, an upper cavity and a lower cavity of the stepped cavity, a cover plate slidably installed on the U-shaped plate at the top of the lower cavity and used for closing the lower cavity, a threaded hole arranged on one arm of the U-shaped plate, a screw threadedly connected in the threaded hole, an accelerometer detachably installed on the screw, and the U-shaped plate comprising a U-shaped part and a connecting part connected with two arms of the U-shaped part. The model box for making a model and the vibration test model box are integrated, so that the stability of the model in the vibration test and the accuracy of the vibration test result are ensured.

Description

Technical Field

[0001] This invention belongs to the technical field of vibration test model boxes, specifically relating to a model box for vibration testing of stepped reinforced soil retaining walls. Background Technology

[0002] Reinforced soil retaining walls are widely used in infrastructure construction such as highways, railways, and airports due to their advantages such as simple construction, low carbon emissions, and excellent seismic performance. The design height of a single-level retaining wall should not exceed 10m. Therefore, for high slope embankment projects, it is advisable to use a stepped reinforced soil retaining wall design. After setting steps between walls, the mutual influence between the upper and lower retaining walls produces a load-reducing effect, reducing the impact of the top load of the wall and the self-weight of the upper retaining wall on the lower retaining wall. Therefore, the application of stepped reinforced soil retaining walls is gradually increasing.

[0003] Vibration tests of reinforced soil retaining walls under seismic loading are generally conducted on a shaking table. The vibration test is carried out by installing a reinforced soil retaining wall model in a model box. A top rod displacement meter is installed on the outside of the model to measure the dynamic displacement change of the wall, and an accelerometer is installed on the inside of the model to collect the acceleration response at different heights in the reinforced and unreinforced areas. However, in the existing technology, the prefabricated reinforced soil model is installed in the model box, resulting in poor fit and affecting the accuracy of the vibration test.

[0004] Therefore, it is necessary to propose a stepped reinforced soil retaining wall vibration test model box to solve the above problems. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a stepped reinforced soil retaining wall vibration test model box to solve the problem in the prior art that the prefabricated reinforced soil model is installed in the model box, resulting in poor fit and affecting the accuracy of the vibration test.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] This invention provides a model box for vibration testing of a stepped reinforced soil retaining wall, comprising: a base plate for mounting on a vibration table surface, and side plates detachably mounted on the base plate. Multiple U-shaped plates are slidably mounted on the side plates, with their two arms slidably mounted on opposite side walls of the side plates. The multiple U-shaped plates and the side plates are joined to form a stepped cavity. The stepped cavity includes an upper cavity and a lower cavity. A cover plate for closing the lower cavity is slidably mounted on the U-shaped plate at the top of the lower cavity. One arm of the U-shaped plate has a threaded hole, and a screw is threaded into the threaded hole. The screw extends to the inner end of the stepped cavity for detachably mounting an accelerometer. The U-shaped plate includes a U-shaped portion and a connecting portion detachably connected to the two arms of the U-shaped portion. The connecting portion is used to extend the arm length of the U-shaped plate.

[0008] Furthermore, the top ends of the two arms of the U-shaped plate are provided with limiting guide rails, and the bottom ends of the two arms of the U-shaped plate are provided with limiting grooves that cooperate with the limiting guide rails. Two adjacent U-shaped plates are slidably connected through the cooperation of the limiting guide rails and the limiting grooves.

[0009] Furthermore, the U-shaped part is formed by splicing two L-shaped plates and a connecting plate located between the two L-shaped plates, and the side plate is formed by splicing two first side plates and a second side plate installed between the two first side plates.

[0010] Furthermore, the side wall of the U-shaped part is provided with a limiting slot, and a limiting plate is inserted along the limiting slot to align multiple U-shaped plates located on the same step.

[0011] Furthermore, the base plate is provided with sliding grooves corresponding to the two arms of the U-shaped plate 3 respectively. A threaded rod is rotatably installed in the sliding groove. An abutment block that can slide along the sliding groove is threadedly connected to the threaded rod. A connecting rod is threadedly connected to the abutment block. The U-shaped plate is provided with a connecting hole that is threadedly engaged with the connecting rod. The connecting rod is threadedly engaged with the connecting hole to fix the abutment block to the U-shaped plate.

[0012] Furthermore, the limiting guide rail is provided with multiple through holes arranged side by side, and a support that can slide vertically along the side plate is installed on the side plate. A limiting seat that can slide along the axis of the side plate is installed on the support. The limiting seat cooperates with the limiting guide rail. The limiting seat is provided with an insertion hole. An insertion rod is installed in the insertion hole. The insertion rod can cooperate with the through hole to limit the displacement of the U-shaped plate along the axis of the side plate.

[0013] Furthermore, a reinforcing rib is installed between the side plate away from the stepped cavity and the bottom plate.

[0014] Furthermore, the screw has a threaded groove inside, and a mounting seat is threaded into the threaded groove. The mounting seat is used to install the accelerometer. After the accelerometer is installed in the model, rotating the screw can cause the screw to be screwed out of the threaded hole and detached from the mounting seat.

[0015] The beneficial effects of this invention are as follows:

[0016] This invention utilizes multiple U-shaped plates and side plates to form a stepped cavity, facilitating the fabrication of stepped reinforced soil retaining walls. The U-shaped plates, connected by screws and threaded holes, allow for easy installation of accelerometers within the model during construction. Limiting guides and grooves ensure close contact between adjacent U-shaped plates, facilitating sliding and maintaining stability, preventing longitudinal separation, and simplifying installation and disassembly. Connecting sections extend the arm length of the U-shaped plates, enabling the fabrication of reinforced soil models of varying lengths. During vibration testing, the U-shaped sections are disassembled, with the connecting sections ensuring stability of the reinforced soil model and facilitating observation of damage under vibration. Integrating the model box for fabrication and the model box for vibration testing into a single unit ensures accurate matching of the stepped reinforced soil retaining wall model with the vibration test model box, guaranteeing model stability and test results accuracy.

[0017] Other advantages, objectives, and features of the invention will be set forth in the following description and will be apparent to those skilled in the art in some respects, or may be learned by practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0018] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the following figures are provided for illustration:

[0019] Figure 1 This is a schematic diagram of the model box structure during model making in an embodiment of the present invention;

[0020] Figure 2 As described in the embodiments of the present invention Figure 1 A magnified view of part A in the middle;

[0021] Figure 3 This is a schematic diagram of the model box structure during vibration testing in an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the installation of the accelerometer in an embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the connection between the abutment block and the U-shaped plate in an embodiment of the present invention.

[0024] The following components are marked in the attached diagram: base plate 1, slide groove 101, threaded rod 102, abutment block 103, connecting rod 104, connecting hole 105, side plate 2, first side plate 201, second side plate 202, support 203, limit seat 204, insertion hole 205, insertion rod 206, U-shaped plate 3, threaded hole 301, screw 302, threaded groove 3021, mounting base 3022, limit guide rail 303, limit groove 304, U-shaped part 305, L-shaped plate 3051, connecting plate 3052, connecting part 306, through hole 307, limit slot 308, limit plate 309, accelerometer 4, cover plate 5, reinforcing rib plate 6. Detailed Implementation

[0025] like Figures 1-5 As shown, this invention provides a model box for vibration testing of a stepped reinforced soil retaining wall, comprising: a base plate 1, and side plates 2 detachably mounted on the base plate 1. Multiple U-shaped plates 3 are slidably mounted on the side plates 2, with their two arms slidably mounted on opposite side walls of the side plates 2. The multiple U-shaped plates 3 and the side plates 2 are joined to form a stepped cavity, which includes an upper cavity and a lower cavity. A cover plate 5 for closing the lower cavity is slidably mounted on the U-shaped plate 3 at the top of the lower cavity. The top ends of the two arms of the U-shaped plates 3 are provided with limiting... The guide rail 303 is provided at the bottom of the two arms of the U-shaped plate 3, and the limiting groove 304 is provided to cooperate with the limiting guide rail 303. Two adjacent U-shaped plates 3 are slidably connected through the limiting guide rail 303 and the limiting groove 304. One arm of the U-shaped plate 3 is provided with a threaded hole 301, and a screw 302 is threadedly connected to the threaded hole 301. The screw 302 extends to the inner end of the stepped cavity for detachable installation of the accelerometer 4. The U-shaped plate 3 includes a U-shaped part 305 and a connecting part 306 that is detachably connected to the two arms of the U-shaped part 305.

[0026] In this scheme, the stepped reinforced soil model constructed in this embodiment is a two-layer model with a total height of 1.8m. The upper and lower walls are each 0.9m high, with the reinforcement arranged horizontally at equal lengths of 0.9m and the layer spacing being 0.15m. When constructing a stepped reinforced soil retaining wall model, such as... Figure 1 After sliding the first U-shaped plate 3 on the base plate 1 along the side plate 2 to the preset position, the reinforcing bars are horizontally arranged at the preset position of the first U-shaped plate 3. Multiple U-shaped plates 3 are then slidably installed on the first U-shaped plate 3 in sequence, with reinforcing bars arranged at corresponding positions on the U-shaped plates 3. This allows the multiple U-shaped plates 3 to cooperate with the side plate 2 to form a lower cavity for pouring the lower-level wall. Then, multiple U-shaped plates 3 are installed to form an upper cavity for pouring the upper-level wall. The upper and lower cavities cooperate to form a stepped cavity. A cover plate 5 for closing the lower cavity is slidably installed on the U-shaped plate 3 located at the top of the lower cavity and outside the upper cavity. At this point, the installation of the model box is complete, and concrete pouring is then carried out. After the model is completed, as shown... Figure 3The U-shaped part 305 located on the upper cavity side is disassembled, and only the U-shaped part 305 located on the lower cavity is retained. The number of U-shaped parts 305 retained on the lower cavity side is determined according to the actual height of the lower wall. In this scheme, only the first layer of U-shaped parts 305 near the bottom plate 1 is retained, so that the first layer of U-shaped parts 305, the connecting part 306 and the side plate 2 cooperate to form a model box for vibration testing. Then, the bottom plate 1 is installed on the table of the vibration table to conduct the vibration test.

[0027] This design utilizes multiple U-shaped plates 3 connected to side plates 2 to form a stepped cavity, facilitating the fabrication of the stepped reinforced soil retaining wall. The U-shaped plates 3, via screws 302 and threaded holes 301, allow for easy installation of the accelerometer 4 within the model during construction. The design incorporates limiting guide rails 303 and limiting grooves 304 to ensure close contact between adjacent U-shaped plates 3, facilitating sliding and maintaining stability, preventing longitudinal separation, and simplifying installation and disassembly. A connecting section is also included. 306 can extend the arm length of the two arms of the U-shaped plate 3, making it easier to make reinforced soil models of different lengths; during vibration tests, after the U-shaped part 305 is disassembled, the stability of the reinforced soil model is ensured only by the connecting part 306 during the vibration test, making it easier to observe the degree of damage to the reinforced soil model under vibration; by integrating the model box used for making the model and the model box used for vibration tests, it is easy to match the stepped reinforced soil retaining wall model with the vibration test model box during vibration tests, ensuring the stability of the model during vibration tests and the accuracy of vibration test results.

[0028] In one embodiment of the present invention, the U-shaped portion 305 is formed by splicing two L-shaped plates 3051 and a connecting plate 3052 located between the two L-shaped plates, and the side plate 2 is formed by splicing two first side plates 201 and a plurality of second side plates 202 installed between the two first side plates 201.

[0029] In this plan, such as Figure 3 By adjusting the length of the prefabricated connecting plate 3052, or by splicing multiple connecting plates 3052 of fixed length, and splicing multiple second side plates 202 of fixed length, the distance between the two arms of the U-shaped part 305 is made consistent with the length of the formed side plate 2, and the distance between the two arms of the U-shaped part 305 is the width of the reinforced soil model. That is, by adjusting the number of connecting plates 3052 and second side plates 202, the width of the reinforced soil model can be adjusted, which facilitates the production of reinforced soil models of different widths and improves the applicability.

[0030] In one embodiment of the present invention, the limiting guide rail 303 is provided with a plurality of through holes 307 arranged side by side, the side plate 2 is provided with a support 203 that can slide along the vertical direction of the side plate 2, the support 203 is provided with a limiting seat 204 that can slide along the axial direction of the side plate 2, the limiting seat 204 cooperates with the limiting guide rail 303, the limiting seat 204 is provided with an insertion hole 205, and an insertion rod 206 is installed in the insertion hole 205. The insertion rod 206 can cooperate with the through hole 307 to limit the sliding of the U-shaped plate 3 along the axial direction of the side plate 2. The side wall of 305 is provided with a limiting groove 308, and the bottom plate 1 is provided with a sliding groove 101. A threaded rod 102 is rotatably installed in the sliding groove 101. An abutment block 103 is threadedly connected to the threaded rod 102. The abutment block 103 is slidably connected to the sliding groove 101. Rotating the threaded rod 102 can make the abutment block 103 slide along the sliding groove 101. The abutment block 103 is threadedly connected to a connecting rod 104. The U-shaped plate 3 is provided with a connecting hole 105 that is threadedly engaged with the connecting rod 104. The connecting rod 104 is threadedly engaged with the connecting hole 105 for fixation.

[0031] In this plan, such as Figure 2 After the U-shaped plate 3 is slid to the preset position, the limiting slots 308 on the U-shaped plate 3 in the upper cavity and the U-shaped plate 3 in the lower cavity correspond one-to-one. The limiting plates 309 are inserted into the limiting slots 308 in the upper and lower cavities respectively, fixing adjacent U-shaped plates 3 in the upper cavity and adjacent U-shaped plates 3 in the lower cavity, ensuring the stability between the U-shaped plates 3. After the U-shaped plate 3 at the top of the upper cavity is slid to the preset position, the displacement of the limiting seat 204 along the axis of the side plate 2 is adjusted by sliding the limiting seat 204, so that the insertion hole 205 on the limiting seat 204 is coaxially set with the through hole 307. The insertion rod 206 is inserted into the insertion hole 205 and the through hole 307, fixing the U-shaped plate 3 in the upper cavity as a whole. Figure 5 After the U-shaped plate 3 in the lower cavity slides to the preset position, the connecting rod 104 is rotated to extend into the connecting hole 105 so that the abutment block 103 is fixed to the U-shaped plate 3. Then the threaded rod 102 is rotated to make the abutment block 103 slide along the slide groove 101, thereby adjusting the position of the U-shaped plate 3 and ensuring the stability of the U-shaped plate 3 after it moves to the preset position in the lower cavity.

[0032] In one embodiment of the present invention, a reinforcing rib plate 6 is installed between the side plate 2 away from the stepped cavity and the bottom plate 1.

[0033] In this design, the stability of the side plate 2 installation is ensured by setting the reinforcing rib plate 6.

[0034] In one embodiment of the present invention, the screw 302 is provided with a screw groove 3021, and a mounting base 3022 is threadedly connected to the screw groove 3021. The mounting base 3022 is used to install the accelerometer 4. After the accelerometer 4 is installed in the model, rotating the screw 302 can cause the screw 302 to be screwed out of the threaded hole 301 and disengaged from the mounting base 3022.

[0035] In this plan, such as Figure 4 By cooperating with the mounting base 3022 and the screw groove 3021, the installation stability of the accelerometer 4 is ensured during the construction of the stepped reinforced soil retaining wall. After the accelerometer 4 is installed, the screw 302 is rotated to disengage the screw 302 from the mounting base 3022, which facilitates the demolding of the U-shaped plate 3.

[0036] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of the present invention.

Claims

1. A model box for vibration testing of a stepped reinforced soil retaining wall, characterized in that, include: A base plate for mounting on a vibration table surface, and side plates detachably mounted on the base plate. Multiple U-shaped plates are slidably mounted on the side plates, with their two arms slidably mounted on opposite side walls of the side plates. The multiple U-shaped plates and the side plates are joined to form a stepped cavity. The stepped cavity includes an upper cavity and a lower cavity. A cover plate for closing the lower cavity is slidably mounted on the U-shaped plate at the top of the lower cavity. One arm of the U-shaped plate has a threaded hole, and a screw is threaded into the threaded hole. The screw extends to the inner end of the stepped cavity for detachably mounting an accelerometer. The U-shaped plate includes a U-shaped part and a connecting part detachably connected to the two arms of the U-shaped part. The connecting part is used to extend the arm length of the U-shaped plate.

2. The model box for vibration testing of stepped reinforced soil retaining wall according to claim 1, characterized in that: The top of the two arms of the U-shaped plate is provided with a limiting guide rail, and the bottom of the two arms of the U-shaped plate is provided with a limiting groove that cooperates with the limiting guide rail. Two adjacent U-shaped plates are slidably connected through the cooperation of the limiting guide rail and the limiting groove.

3. The model box for vibration testing of stepped reinforced soil retaining wall according to claim 1, characterized in that: The U-shaped section is formed by splicing two L-shaped plates and a connecting plate located between the two L-shaped plates, and the side plate is formed by splicing two first side plates and a second side plate installed between the two first side plates.

4. The model box for vibration testing of stepped reinforced soil retaining wall according to claim 1, characterized in that: The side wall of the U-shaped part is provided with a limiting slot, and a limiting plate is inserted along the limiting slot to align multiple U-shaped plates located on the same step.

5. The model box for vibration testing of stepped reinforced soil retaining wall according to claim 2, characterized in that: The base plate is provided with sliding grooves corresponding to the two arms of the U-shaped plate (3). A threaded rod is rotatably installed in the sliding groove. A stop block that can slide along the sliding groove is threadedly connected to the threaded rod. A connecting rod is threadedly connected to the stop block. A connecting hole that is threadedly engaged with the connecting rod is provided on the U-shaped plate. The connecting rod is threadedly engaged with the connecting hole to fix the stop block to the U-shaped plate.

6. The model box for vibration testing of stepped reinforced soil retaining wall according to claim 2, characterized in that: The limiting guide rail has multiple through holes arranged side by side. The side plate is equipped with a support that can slide vertically along the side plate. The support is equipped with a limiting seat that can slide along the axis of the side plate. The limiting seat cooperates with the limiting guide rail. The limiting seat is equipped with an insertion hole. An insertion rod is installed in the insertion hole. The insertion rod can cooperate with the through hole to limit the displacement of the U-shaped plate along the axis of the side plate.

7. The model box for vibration testing of stepped reinforced soil retaining wall according to claim 1, characterized in that: A reinforcing rib is installed between the side plate away from the stepped cavity and the bottom plate.

8. The model box for vibration testing of stepped reinforced soil retaining wall according to claim 1, characterized in that: The screw has a screw groove inside, and a mounting base is threaded into the screw groove. The mounting base is used to install the accelerometer. After the accelerometer is installed in the model, rotating the screw can cause the screw to be screwed out of the threaded hole and detached from the mounting base.

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