Rock mass self weight-tectonic stress response super-large span cave depot excavation simulation test device

Abstract

The invention belongs to the technical field of simulation test devices, and particularly relates to a rock mass self-weight-tectonic stress response super-large span cave depot excavation simulation test device, which comprises a frame assembly, a rock mass self-weight-tectonic stress simulation test device and a rock mass self-weight-tectonic stress simulation test device, the loading assembly is arranged in the frame assembly, and the loading assembly is used for applying a load to the sample; the window is formed in the frame assembly and used for simulating cave depot excavation unloading response; the support assembly is movably connected with one end of the frame assembly, and the support assembly is used for supporting the frame assembly; the angle adjusting assembly is fixedly connected with the other end of the frame assembly, and the angle adjusting assembly is used for adjusting the inclination angle of the frame assembly. According to the method, the synergistic effect of the rock mass self-weight-tectonic stress response and the dynamic excavation unloading response can be achieved, the limitation of a traditional test technology is broken through, and a scientific basis is provided for safe construction and long-term operation and maintenance of a super-large-span cave depot.

Description

Technical Field

[0001] This invention belongs to the technical field of simulation test devices, and in particular relates to a simulation test device for the excavation of ultra-large span tunnels based on the rock mass self-weight-tectonic stress response. Background Technology

[0002] With the accelerated development and utilization of underground space, ultra-large span caverns have become the preferred choice for strategic reserves and other projects due to their high space utilization efficiency. However, the coupling effect of rock mass self-weight-tectonic stress and span effect during excavation significantly exacerbates the risk of surrounding rock instability. After the excavation of ultra-large span caverns, the non-uniform stress field formed by the rock mass self-weight stress and tectonic stress leads to asymmetric deformation characteristics of the surrounding rock, which can easily induce a chain of disasters such as roof tension fracture and sidewall shear slip. Existing physical simulation test devices mostly use fixed plane strain models or small-scale scaled models, and are mostly limited to single stress field loading, which cannot simulate the synergistic effect of rock mass self-weight-tectonic stress response and dynamic excavation unloading response.

[0003] Therefore, it is necessary to design a simulation test device for the excavation of ultra-large span tunnels based on the rock mass self-weight-tectonic stress response to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a simulation test device for the excavation of ultra-large span tunnels based on the rock mass self-weight-tectonic stress response. By applying axial and lateral loads and actively adjusting the inclination angle of the test platform, the synergistic effect of the rock mass self-weight-tectonic stress response and the dynamic excavation unloading response can be achieved.

[0005] To achieve the above objectives, the present invention provides the following solution: a simulation test device for excavation of a super-large span tunnel based on the rock mass self-weight-tectonic stress response, comprising: a frame assembly for holding a sample; a loading assembly disposed within the frame assembly for applying a load to the sample; a window formed on the frame assembly for simulating the unloading response during tunnel excavation; a support assembly movably connected to one end of the frame assembly for supporting the frame assembly; and an angle adjustment assembly fixedly connected to the other end of the frame assembly for adjusting the tilt angle of the frame assembly.

[0006] The simulation test device for excavation of ultra-large span tunnels based on the rock mass self-weight-tectonic stress response of the present invention includes a frame assembly comprising a top fixed baffle, a left fixed frame fixedly connected to one end of the top fixed baffle, a right fixed baffle fixedly connected to the other end of the top fixed baffle, and a bottom fixed baffle fixedly connected to the ends of the left fixed frame and the right fixed baffle away from the top fixed baffle. The top fixed baffle, the left fixed frame, the right fixed baffle, and the bottom fixed baffle form a quadrilateral. A baffle assembly is provided on the outer side of the quadrilateral. The sample is placed inside the quadrilateral and the baffle assembly. A window is opened on the baffle assembly. A zoned pressure application assembly is provided on the side wall of the left fixed frame near the right fixed baffle. The zoned pressure application assembly is used to apply zoned loads to the sample.

[0007] The simulation test device for excavation of ultra-large span tunnel based on the rock mass self-weight-tectonic stress response of the present invention includes a baffle assembly comprising a glass plate and a rear baffle. The glass plate and the rear baffle are detachably connected to the outer sides of the quadrilateral by nuts and bolts, and the window is opened on the glass plate.

[0008] The simulation test device for excavation of ultra-large span tunnel based on the rock mass self-weight-tectonic stress response of the present invention includes a zonal pressure application component comprising a plurality of left-side movable baffles, which are arranged sequentially along the length direction of the left-side fixed frame and are located on the side wall of the left-side fixed frame near the right-side fixed baffle.

[0009] The simulation test device for excavation of ultra-large span tunnel based on the rock mass self-weight-tectonic stress response of the present invention includes a loading component comprising several axial loading units, which are equally spaced along the length direction of the top fixed baffle.

[0010] The simulation test device for excavation of ultra-large span tunnel based on rock mass self-weight-tectonic stress response of the present invention includes a support assembly comprising a support base and a support slot. The support slot is opened at one end of the frame assembly. The support base is fixed on the ground. The support base is rotatably connected to one end of a detachable support. The other end of the detachable support is movably disposed in the support slot.

[0011] The simulation test device for excavation of ultra-large span tunnel based on rock mass self-weight-tectonic stress response of the present invention includes an angle adjustment component comprising an angle adjustment part and a rotating fixed base. The fixed end of the rotating fixed base is fixedly connected to the ground, and the rotating end of the rotating fixed base is fixedly connected to the other end of the frame component. The angle adjustment part is fixedly connected to the frame component.

[0012] The simulation test device for excavation of ultra-large span tunnel based on the rock mass self-weight-tectonic stress response of the present invention includes an angle adjustment unit comprising a jack, the jack being placed vertically on the ground, the telescopic end of the jack being rotatably connected to one end of a connecting rod, and the other end of the connecting rod being fixedly connected to the frame assembly.

[0013] The simulation test device for excavation of ultra-large span tunnel based on the rock mass self-weight-tectonic stress response of the present invention, wherein the connecting rod is perpendicular to the frame assembly.

[0014] Based on the rock mass self-weight-tectonic stress response simulation test device for excavation of ultra-large span tunnels according to the present invention, the left fixed frame and the right fixed baffle are provided with a number of reserved holes, and the bolts are set in the reserved holes.

[0015] Compared with the prior art, the present invention has the following advantages and technical effects: The present invention can apply axial load to the sample through the loading component, apply lateral load to the sample through the partitioned pressure component, and actively adjust the tilt angle of the frame component through the angle adjustment component. Through the cooperation of the above components, the synergistic effect of rock mass self-weight-tectonic stress response and dynamic excavation unloading response can be realized. The present invention breaks through the limitations of traditional test technology and provides a scientific basis for safe construction and long-term operation and maintenance of ultra-large span tunnels. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a perspective view of the present invention.

[0018] Figure 2 This is a plan view of the present invention.

[0019] Figure 3 This is a side view of the present invention and its dynamic movement process.

[0020] The components are as follows: 1. Glass plate; 2. Window; 3. Back panel; 4. Top fixed panel; 5. Left fixed frame; 6. Left movable panel; 7. Right fixed panel; 8. Bottom fixed panel; 9. Axial loading unit; 10. Reserved hole; 11. Bracket slot; 12. Bracket base; 13. Detachable bracket; 14. Connecting rod; 15. Jack; 16. Nut; 17. Bolt; 18. Rotary fixed base. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Reference Figures 1 to 3 As shown, the present invention provides a simulation test device for excavation of a super-large span tunnel based on the rock mass self-weight-tectonic stress response, comprising: a frame assembly for holding the sample; a loading assembly disposed within the frame assembly for applying load to the sample; a window 2 opened on the frame assembly for simulating the unloading response during tunnel excavation; a support assembly movably connected to one end of the frame assembly for supporting the frame assembly; and an angle adjustment assembly fixedly connected to the other end of the frame assembly for adjusting the tilt angle of the frame assembly.

[0024] Furthermore, the frame assembly includes a top fixed baffle 4, one end of which is fixedly connected to a left fixed frame 5, and the other end of which is fixedly connected to a right fixed baffle 7. The ends of the left fixed frame 5 and the right fixed baffle 7 away from the top fixed baffle 4 are jointly fixedly connected to a bottom fixed baffle 8. The top fixed baffle 4, the left fixed frame 5, the right fixed baffle 7, and the bottom fixed baffle 8 form a quadrilateral. A baffle assembly is provided on the outside of the quadrilateral. The sample is placed inside the quadrilateral and the baffle assembly. A window 2 is opened on the baffle assembly. A partitioned pressure assembly is provided on the side wall of the left fixed frame 5 near the right fixed baffle 7. The partitioned pressure assembly is used to apply partitioned loads to the sample.

[0025] Furthermore, the baffle assembly includes a glass plate 1 and a rear baffle 3, both of which are detachably connected to the outer sides of the quadrilateral by nuts 16 and bolts 17, and the window 2 is opened on the glass plate 1.

[0026] Furthermore, the partitioned pressure assembly includes several left-side movable baffles 6, which are arranged sequentially along the length of the left-side fixed frame 5, and are located on the side wall of the left-side fixed frame 5 near the right-side fixed baffle 7.

[0027] Furthermore, the loading component includes several axial loading units 9, which are equally spaced along the length of the top fixed baffle 4.

[0028] The rock mass self-weight stress field is reproduced by applying vertical stress along the height direction through the independently controlled axial loading unit 9; the left movable baffle 6 and the right fixed baffle 7 can realize horizontal stress zoning loading, and combined with the axial loading unit 9, the composite field characteristics of "self-weight-tectonic stress" can be simulated.

[0029] Furthermore, the bracket assembly includes a bracket base 12 and a bracket slot 11. The bracket slot 11 is opened at one end of the frame assembly. The bracket base 12 is fixed to the ground. One end of the bracket base 12 is rotatably connected to a detachable bracket 13. The other end of the detachable bracket 13 is movably disposed in the bracket slot 11.

[0030] Furthermore, the angle adjustment assembly includes an angle adjustment part and a rotating fixed base 18. The fixed end of the rotating fixed base 18 is fixedly connected to the ground, the rotating end of the rotating fixed base 18 is fixedly connected to the other end of the frame assembly, and the angle adjustment part is fixedly connected to the frame assembly.

[0031] Furthermore, the angle adjustment unit includes a jack 15, which is placed vertically on the ground. The telescopic end of the jack 15 is rotatably connected to one end of a connecting rod 14, and the other end of the connecting rod 14 is fixedly connected to the frame assembly.

[0032] Furthermore, the connecting rod 14 is perpendicular to the frame assembly.

[0033] Furthermore, several reserved holes 10 are provided on both the left fixed frame 5 and the right fixed baffle 7, and bolts 17 are installed in the reserved holes 10.

[0034] The rotating fixed base 18 and the jack 15 ensure that the test device can rotate, while the bracket slot 11, the detachable bracket 13, and the connecting rod 14 provide support for the safety and stability of the test device. The assembled test device is placed horizontally, and the rotating fixed base 18 is installed at its bottom. The connecting rod 14 is installed approximately one-third of the way up from the bottom, with the connecting rod 14 perpendicular to the test device. Then, the jack 15 is used to push the connecting rod 14 and the test device to move synchronously. Finally, based on specific test requirements, different angles are selected to connect the detachable bracket 13, the bracket base 12, and the bracket slot 11, thereby fixing the test device and simulating the response characteristics of rock mass self-weight load.

[0035] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0036] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope of the present invention.

Claims

1. A large-span cavern excavation simulation test device for rock mass self-weight-tectonic stress response, characterized in that, The utility model relates to a kind of simulation device for simulating the response of tunnel excavation unloading, comprising: Frame assembly for containing test sample; Loading assembly disposed in the frame assembly, the loading assembly for applying load to test sample; Window (2) is opened in the frame assembly, the window (2) is used to simulate the response of tunnel excavation unloading; Support assembly movably connected to one end of the frame assembly, the support assembly for supporting the frame assembly; Angle adjusting assembly fixedly connected to the other end of the frame assembly, the angle adjusting assembly for adjusting the inclination angle of the frame assembly.

2. The rock mass self-weight-tectonic stress response super-long-span cavern excavation simulation test device according to claim 1, characterized in that, The frame assembly includes a top fixed baffle (4), one end of the top fixed baffle (4) is fixedly connected with a left fixed frame (5), the other end of the top fixed baffle (4) is fixedly connected with a right fixed baffle (7), the left fixed frame (5) and the right fixed baffle (7) are commonly fixedly connected with a bottom fixed baffle (8) away from one end of the top fixed baffle (4), the top fixed baffle (4), the left fixed frame (5), the right fixed baffle (7), and the bottom fixed baffle (8) form a quadrilateral, the outer side of the quadrilateral is provided with a baffle assembly, the test sample is placed inside the quadrilateral and the baffle assembly, the window (2) is opened in the baffle assembly, the left fixed frame (5) is provided with a partitioned pressure assembly on the side wall close to the right fixed baffle (7), the partitioned pressure assembly is used to apply partitioned load to the test sample.

3. The test device for simulating the response of rock mass to self-weight-tectonic stress of super-long-span cavern according to claim 2, characterized in that, The baffle assembly includes a glass plate (1) and a back baffle (3), the glass plate (1) and the back baffle (3) are detachably connected on the outer sides of the quadrilateral by nuts (16) and bolts (17), and the window (2) is opened in the glass plate (1).

4. The test device for simulating the response of rock mass to self-weight-tectonic stress of super-long-span cavern according to claim 2, characterized in that, The partitioned pressure assembly includes a plurality of left moving baffles (6), the left moving baffles (6) are sequentially arranged along the length direction of the left fixed frame (5), and the left moving baffles (6) are arranged on the side wall of the left fixed frame (5) close to the right fixed baffle (7).

5. The test device for simulating the response of rock mass to self-weight-tectonic stress of super-long-span cavern according to claim 2, characterized in that, The loading assembly includes a plurality of axial loading units (9), and the axial loading units (9) are equally spaced along the length direction of the top fixed baffle (4).

6. The test apparatus for simulating the response of a rock mass to self-weight-tectonic stress of a super-long-span cavern according to claim 1, characterized in that, The support assembly includes a support base (12) and a support clamping groove (11), the support clamping groove (11) is opened in one end of the frame assembly, the support base (12) is fixed on the ground, one end of a detachable support (13) is rotatably connected with the support base (12), and the other end of the detachable support (13) is movably arranged in the support clamping groove (11).

7. The rock mass self-weight-tectonic stress response super-long-span cavern excavation simulation test device according to claim 1, characterized in that, The angle adjusting assembly includes an angle adjusting part and a rotary fixed base (18), the fixed end of the rotary fixed base (18) is fixedly connected with the ground, the rotary end of the rotary fixed base (18) is fixedly connected with the other end of the frame assembly, and the angle adjusting part is fixedly connected with the frame assembly.

8. The test device for simulating the response of rock mass to self-weight-tectonic stress of super-long-span cavern according to claim 7, characterized in that, The angle adjusting part comprises a jack (15) vertically placed on the ground, and one end of the jack (15) is rotationally connected with a connecting rod (14), and the other end of the connecting rod (14) is fixedly connected with the frame assembly.

9. The rock mass self-weight-tectonic stress response super-long-span cavern excavation simulation test device according to claim 8, characterized in that, The connecting rod (14) is perpendicular to the frame assembly.

10. The test apparatus for simulating the response of a rock mass to self-weight-tectonic stress of a super-long-span cavern according to claim 3, characterized in that, A plurality of reserved holes (10) are formed in the left fixed frame (5) and the right fixed baffle (7), and the bolts (17) are arranged in the reserved holes (10).

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