A deep rock mass load testing device

Abstract

The utility model belongs to the deep rock foundation load test technical field, concretely relates to a deep rock foundation load test device, including base, the inside installation of base has electric telescopic handle, the output end connection of electric telescopic handle has the lifting seat, the top of lifting seat is installed with the jack, is provided with the crossbeam at the top of jack, is provided with the heap load block at the top of crossbeam, is provided with the buttress at the both ends bottom of crossbeam. The utility model drives the second bevel gear clockwise rotation through the control panel control motor, then utilizes the meshing relationship between the second bevel gear and first bevel gear and drives the bidirectional screw rod rotation, at this moment, the two threaded sleeves of its outer wall screw connection can drive the movable block along the guide rod and move oppositely, along with the movement of two movable blocks, the telescopic rod of its outer wall fixed connection will drive the limiting plate and the contact of foundation pit inner wall, so as to utilize two limiting plates and press the foundation pit inner wall and can play the role of limiting, avoids the device and occurs the situation of skew.

Description

Technical Field

[0001] This utility model belongs to the field of deep rock foundation load testing technology, and specifically relates to a deep rock foundation load testing device. Background Technology

[0002] The foundation load test is a test conducted on-site to determine the bearing capacity of rock foundations by transferring the upper load through a circular rigid bearing plate and gradually increasing the load while measuring the corresponding settlement of the bearing plate to obtain the PS curve. The test is further divided into rock foundation plate load test and deep plate load test. For determining the bearing capacity of natural rock foundations where the rock strata are relatively shallow, a deep rock foundation load test device is generally used.

[0003] Currently, existing deep rock foundation load testing devices typically require pre-embedding the device in a foundation pit during use. Then, the crossbeam is mounted on jacks and supports, and deep rock foundation load tests are conducted by stacking load blocks. However, traditional deep rock foundation load testing devices often lack limiting mechanisms, which may cause tilting after being pre-embedded in the foundation pit. Although manual calibration can be performed, the lack of a good limiting mechanism still results in tilting, which may reduce the accuracy of deep rock foundation load tests. Utility Model Content

[0004] The purpose of this invention is to provide a deep rock foundation load testing device, which aims to solve the problem that existing deep rock foundation load testing devices typically require pre-embedding the device in a foundation pit, then mounting the crossbeam on jacks and supports, and conducting deep rock foundation load tests by stacking load blocks. However, traditional deep rock foundation load testing devices often lack a limiting mechanism, which may cause tilting after being pre-embedded in the foundation pit. Although manual calibration can be performed, the lack of a good limiting mechanism still results in tilting, which may reduce the accuracy of the deep rock foundation load test.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a deep rock foundation load testing device, including a base, an electric telescopic rod installed inside the base, a lifting seat connected to the output end of the electric telescopic rod, a jack installed on the top of the lifting seat, a crossbeam provided on the top of the jack, and a load block provided on the top of the crossbeam.

[0006] The bottom of both ends of the crossbeam is provided with supports, the top of the lifting seat is equipped with a displacement sensor, the base is equipped with a bidirectional screw rod, the outer wall of the bidirectional screw rod is threaded with two threaded sleeves, the outer walls of the two threaded sleeves are fixedly connected with movable blocks, the outer walls of the movable blocks are fixedly connected with telescopic rods, and one end of the telescopic rod passes through the base and is connected to a limit plate.

[0007] As a preferred embodiment of the deep rock foundation load testing device of this utility model, the two ends of the bidirectional lead screw are connected to the inner wall of the base through bearings to form a rotating connection structure.

[0008] As a preferred embodiment of the deep rock foundation load testing device of this utility model, a guide rod is fixedly connected to the inner wall of the base, and one end of the movable block is sleeved on the outer wall of the guide rod.

[0009] As a preferred embodiment of the deep rock foundation load testing device of this utility model, the outer wall of the bidirectional lead screw is fixedly connected with a first conical tooth, the inner wall of the base is fixedly connected with a fixing plate, the top of the fixing plate is equipped with a motor, and the output end of the motor is connected with a second conical tooth.

[0010] In a preferred embodiment of the deep rock foundation load testing device of this utility model, the first bevel tooth and the second bevel tooth mesh with each other.

[0011] As a preferred embodiment of the deep rock foundation load testing device of this utility model, the surface of the limiting plate is fixedly connected with a conical spike.

[0012] As a preferred embodiment of the deep rock foundation load testing device of this utility model, the conical spikes are provided in multiple ways, and the multiple conical spikes are arranged in a rectangular grid pattern.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] The motor is controlled by the control panel to rotate the second bevel gear clockwise. Then, the meshing relationship between the second bevel gear and the first bevel gear drives the bidirectional lead screw to rotate. At this time, the two threaded sleeves connected to the outer wall can drive the movable block to move in opposite directions along the guide rod. As the two movable blocks move, the telescopic rod fixedly connected to the outer wall will drive the limiting plate to contact the inner wall of the pit. Thus, the two limiting plates can squeeze the inner wall of the pit to play a limiting role and prevent the device from tilting.

[0015] By arranging multiple conical spikes in a rectangular grid on the surface of the limiting plate, when two opposing movements compress the inner wall of the pit, the multiple conical spikes will embed into the inner wall of the pit, thereby improving the stability between the limiting plate and the inner wall of the pit. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the main cross-sectional structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the structural structure of this utility model from a bottom view.

[0020] Figure 4 This is an enlarged structural schematic diagram of the present invention.

[0021] In the diagram: 1. Base; 2. Electric telescopic rod; 3. Lifting seat; 4. Jack; 5. Crossbeam; 6. Stacking block; 7. Support; 8. Displacement sensor; 9. Two-way lead screw; 10. Threaded sleeve; 11. Movable block; 12. Telescopic rod; 13. Limiting plate; 14. Guide rod; 15. First conical tooth; 16. Fixing plate; 17. Motor; 18. Second conical tooth; 19. Conical spike. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1-4 The present invention provides the following technical solution: a deep rock foundation load test device, including a base 1, an electric telescopic rod 2 installed inside the base 1, a lifting seat 3 connected to the output end of the electric telescopic rod 2, a jack 4 installed on the top of the lifting seat 3, a crossbeam 5 set on the top of the jack 4, and a load block 6 set on the top of the crossbeam 5.

[0024] The bottom of both ends of the crossbeam 5 is provided with support 7, the top of the lifting seat 3 is equipped with displacement sensor 8, the base 1 is equipped with a bidirectional screw 9, the outer wall of the bidirectional screw 9 is threaded with two threaded sleeves 10, the outer wall of the two threaded sleeves 10 is fixedly connected with a movable block 11, the outer wall of the movable block 11 is fixedly connected with a telescopic rod 12, one end of the telescopic rod 12 passes through the base 1 and is connected to a limit plate 13.

[0025] Among them, the electric telescopic rod 2 is used to drive the jack 4 to rise and fall so that it contacts the bottom of the crossbeam 5;

[0026] It should be noted that the wiring terminals of the electric telescopic rod 2, displacement sensor 8, and motor 17 are connected to the external control panel and the power supply. In addition, a pressure sensor is installed inside the device to measure the load applied by the jack 4 in order to accurately record the load.

[0027] Preferably, the two ends of the bidirectional lead screw 9 are connected to the inner wall of the base 1 by bearings to form a rotating connection structure. The inner wall of the base 1 is fixedly connected to the guide rod 14, and one end of the movable block 11 is sleeved on the outer wall of the guide rod 14.

[0028] In practical use, the motor 17 is controlled by the control panel to drive the second bevel gear 18 to rotate clockwise. Then, the meshing relationship between the second bevel gear 18 and the first bevel gear 15 drives the bidirectional lead screw 9 to rotate. At this time, the two threaded sleeves 10 connected to the outer wall can drive the movable block 11 to move in opposite directions along the guide rod 14. As the two movable blocks 11 move, the telescopic rod 12 fixedly connected to the outer wall will drive the limiting plate 13 to contact the inner wall of the pit. Thus, the two limiting plates 13 can squeeze the inner wall of the pit to play a limiting role and prevent the device from tilting.

[0029] Preferably, a first bevel tooth 15 is fixedly connected to the outer wall of the bidirectional lead screw 9, a fixing plate 16 is fixedly connected to the inner wall of the base 1, a motor 17 is installed on the top of the fixing plate 16, and a second bevel tooth 18 is connected to the output end of the motor 17. The first bevel tooth 15 and the second bevel tooth 18 mesh with each other.

[0030] In actual use, the motor 17 is controlled by the control panel to drive the second bevel gear 18 to rotate counterclockwise. Then, the meshing relationship between the second bevel gear 18 and the first bevel gear 15 is used to drive the bidirectional lead screw 9 to rotate. At this time, the two threaded sleeves 10 connected to the outer wall can drive the movable block 11 to move towards each other along the guide rod 14. As the two movable blocks 11 move, the telescopic rod 12 fixedly connected to the outer wall will drive the limiting plate 13 away from the inner wall of the pit.

[0031] Preferably, the surface of the limiting plate 13 is fixedly connected with a tapered spike 19, and multiple tapered spikes 19 are provided, and the multiple tapered spikes 19 are arranged in a rectangular grid.

[0032] In practical use, multiple conical spikes 19 are arranged in a rectangular grid on the surface of the limiting plate 13. When the two opposing movements compress the inner wall of the pit, the multiple conical spikes 19 will embed into the inner wall of the pit, thereby improving the stability between the limiting plate 13 and the inner wall of the pit.

[0033] Working principle: First, the device is pre-embedded in the foundation pit. Then, the motor 17 is controlled by the control panel to drive the second bevel gear 18 to rotate clockwise. Then, the meshing relationship between the second bevel gear 18 and the first bevel gear 15 drives the bidirectional lead screw 9 to rotate. At this time, the two threaded sleeves 10 connected to the outer wall can drive the movable block 11 to move in opposite directions along the guide rod 14. As the two movable blocks 11 move, the telescopic rod 12 fixedly connected to the outer wall will drive the limiting plate 13 to contact the inner wall of the foundation pit. Thus, the two limiting plates 13 can squeeze the inner wall of the foundation pit to play a limiting role and avoid... To prevent the device from tilting, multiple conical spikes 19 are arranged in a rectangular grid on the surface of the limiting plate 13. When the two opposing movements compress the inner wall of the pit, the multiple conical spikes 19 will embed into the inner wall of the pit, thereby improving the stability between the limiting plate 13 and the inner wall of the pit. Then, the crossbeam 5 is erected on the jack 4 and the support 7. A deep rock foundation load test is carried out by adding a surcharge block 6. During the test, the settlement deformation of the bearing plate under the load is monitored by the displacement sensor 8, and the load applied by the jack 4 is measured by the pressure sensor to accurately record the load.

[0034] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A deep rock foundation load testing device, comprising a base (1), characterized in that: An electric telescopic rod (2) is installed inside the base (1). The output end of the electric telescopic rod (2) is connected to a lifting seat (3). A jack (4) is installed on the top of the lifting seat (3). A crossbeam (5) is provided on the top of the jack (4). A stacking block (6) is provided on the top of the crossbeam (5). The bottom of both ends of the crossbeam (5) is provided with a support (7), the top of the lifting seat (3) is equipped with a displacement sensor (8), the base (1) is equipped with a two-way screw rod (9), the outer wall of the two-way screw rod (9) is threaded with two threaded sleeves (10), the outer wall of the two threaded sleeves (10) is fixedly connected with a movable block (11), the outer wall of the movable block (11) is fixedly connected with a telescopic rod (12), one end of the telescopic rod (12) passes through the base (1) and is connected to a limit plate (13).

2. The deep rock foundation load testing device according to claim 1, characterized in that: The two ends of the bidirectional lead screw (9) are connected to the inner wall of the base (1) by bearings to form a rotating connection structure.

3. The deep rock foundation load testing device according to claim 1, characterized in that: The inner wall of the base (1) is fixedly connected to a guide rod (14), and one end of the movable block (11) is sleeved on the outer wall of the guide rod (14).

4. The deep rock foundation load testing device according to claim 1, characterized in that: The outer wall of the bidirectional lead screw (9) is fixedly connected to a first bevel tooth (15), the inner wall of the base (1) is fixedly connected to a fixing plate (16), a motor (17) is installed on the top of the fixing plate (16), and the output end of the motor (17) is connected to a second bevel tooth (18).

5. The deep rock foundation load testing device according to claim 4, characterized in that: The first bevel tooth (15) meshes with the second bevel tooth (18).

6. The deep rock foundation load testing device according to claim 1, characterized in that: The surface of the limiting plate (13) is fixedly connected with a conical spike (19).

7. The deep rock foundation load testing device according to claim 6, characterized in that: The conical spikes (19) are provided in multiple ways, and the multiple conical spikes (19) are arranged in a rectangular grid.

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