Auxiliary sample loading device for tunnel surrounding rock mechanical test

Abstract

The utility model discloses an auxiliary sample loading device for tunnel surrounding rock mechanical test. The auxiliary sample loading device comprises a lower disc positioning assembly and an upper disc positioning assembly, the lower disc positioning assembly comprises a lower disc positioning disc and supporting rods, the lower disc positioning disc is in a circular ring shape, a lower disc limiting area is arranged in the middle of the lower disc positioning disc, at least three supporting rods perpendicularly penetrate through the lower disc positioning disc and are fixedly arranged with the lower disc positioning disc, and the supporting rods are arranged in the circumferential direction of the lower disc positioning disc. The upper disc positioning assembly comprises an upper disc positioning frame, one end of the upper disc positioning frame is detachably connected to the supporting rod, the other end of the upper disc positioning frame extends towards the center of the circular ring, and the upper surface of the upper disc positioning frame is perpendicular to the supporting rod and provided with an upper disc limiting area. The lower disc positioning component and the upper disc positioning component are respectively used for mounting and positioning the lower disc and the upper disc of the rock mechanics testing system, so that the lower disc is horizontally mounted, the upper disc and the lower disc are mounted in parallel, the upper disc and the lower disc can be quickly mounted, the test sample loading efficiency is improved, and the test cost is reduced. And the accuracy of the test is ensured to a certain extent.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of rock mechanics performance test technical equipment field, in particular to a kind of auxiliary sample loading device of tunnel surrounding rock mechanics test. BACKGROUND

[0002] In order to ensure the efficiency and safety of tunnel construction, the mechanical properties of tunnel surrounding rock need to be tested to select the appropriate support form and strength, and then adapt to the work of tunnel in different strata.

[0003] In the test practice of tunnel surrounding rock mechanics, the macro mechanical parameters of rock are tested by using rock mechanics test system produced by American GCTS company, and the testing principle is as shown in Figure 1 The test piece D is arranged between the base E and the pressure head F, the radial sensor J is installed on the test piece, the upper disc A and the lower disc B are arranged at intervals on the outer periphery of the test piece, the upper disc A and the lower disc B are positioned and kept horizontal by two positioning rods C, the upper disc A and the lower disc B are fixed by the fixing screw I, the axial sensor G is arranged on the lower disc B, the magnetic steel rod H passes through the axial sensor G vertically inserted into the lower disc B from top to bottom, so as to ensure that the strain obtained by the test is equal to the actual axial strain of the test piece when the axial pressure is applied, and ensure that the magnetic steel rod H does not break and does not affect the test result of rock mechanics performance when the test piece is compressed and fails.

[0004] In actual operation, it is difficult to ensure that the upper disc and the lower disc are parallel to each other and horizontal to the surface of the test piece by using only two positioning rods, and there are disadvantages that the sample loading process consumes too much time and the training cost required for mastering the sample loading process is too high. In order to improve the test sample loading and test efficiency and ensure the test accuracy, it is necessary to design an auxiliary sample loading device. UTILITY MODEL CONTENT

[0005] To solve the above problems in the prior art, the utility model provides an auxiliary sample loading device for tunnel surrounding rock mechanics test, which improves the test sample loading efficiency and ensures the test accuracy.

[0006] To achieve the above technical purpose, the utility model adopts the technical scheme of:

[0007] The utility model provides an auxiliary device of tunnel surrounding rock mechanics test test, including lower disc positioning assembly, upper disc positioning assembly, the lower disc positioning assembly includes lower disc positioning disc, support rod, the lower disc positioning disc is circular, and the circular middle part is equipped with lower disc limiting area, and at least three support rods vertically pass through the lower disc positioning disc and are fixedly arranged with the lower disc positioning disc, and the support rod is arranged along the circumference of the lower disc positioning disc, the upper disc positioning assembly includes upper disc positioning frame, and the number of upper disc positioning frame is same with the number of support rod, and one end of upper disc positioning frame is detachably connected on the support rod, and the other end extends to the center of the circle, and the upper surface of upper disc positioning frame is perpendicular to the support rod, and the upper surface of upper disc positioning frame is equipped with upper disc limiting area.

[0008] As a preferred technical scheme, the support rod is provided with a plurality of bolt holes in the axial direction, and the one end of the upper disc positioning frame is clamped on the outer periphery of the support rod and connected by at least two bolts.

[0009] As a preferred technical scheme, the top surface of the upper disc positioning frame is provided with a limiting protrusion, and the limiting protrusions of the plurality of upper disc positioning frames enclose the upper disc limiting area.

[0010] As a preferred technical scheme, the bottom surface of the upper disc positioning frame is inclined.

[0011] As a preferred technical scheme, the middle part of the lower disc positioning disc is provided with a circular groove, and the circular groove is the lower disc limiting area, and the depth of the circular groove is less than the thickness of the lower disc.

[0012] As a preferred technical scheme, the circular groove is provided with a notch.

[0013] As a preferred technical scheme, the lower disc positioning disc is assembled by two semicircular rings.

[0014] As a preferred technical scheme, the two semicircular rings of the lower disc positioning disc are provided with connecting holes on both sides of the splicing seam, and the two semicircular rings are connected by a U-shaped bolt.

[0015] As a preferred technical scheme, the splicing seam of the two semicircular rings of the lower disc positioning disc is in the shape of a broken line.

[0016] As a preferred technical scheme, the splicing part of the two semicircular rings of the lower disc positioning disc is provided with a lap joint edge.

[0017] The utility model discloses the beneficial effect has:

[0018] The auxiliary sample mounting device for the tunnel surrounding rock mechanics test can ensure the installation level of the lower disc, and the upper disc and the lower disc are installed in parallel with each other, the installation of the upper disc and the lower disc can be quickly completed, the sample mounting efficiency of the rock mechanics test is improved, and the accuracy of the test is ensured to a certain extent.

[0019] The upper disc positioning assembly of the auxiliary sample mounting device for the tunnel surrounding rock mechanics test is detachably connected to the supporting rod of the lower disc positioning assembly, convenient and fast installation is realized, and the upper disc positioning assembly can be installed at a suitable height according to requirements.

[0020] The lower disc positioning disc of the lower disc positioning assembly is assembled by two semicircular rings, and the installation is convenient. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of the drawings.

[0022] Figure 1 It is a test principle schematic diagram of the rock mechanics test system in the prior art;

[0023] Figure 2 It is a whole schematic diagram of the embodiment of the present application;

[0024] Figure 3 It is Figure 2 a partial enlarged schematic diagram;

[0025] Figure 4 It is a schematic diagram of the lower disc positioning assembly;

[0026] Figure 5 It is Figure 4 an explosion schematic diagram;

[0027] Figure 6 It is a front view of the upper disc positioning frame;

[0028] Figure 7 It is Figure 6 a left side view.

[0029] Fig. 1 is a lower disc positioning assembly, Fig. 2 is an upper disc positioning assembly, Fig. 11 is a lower disc positioning disc, Fig. 12 is a support rod, Fig. 13 is a lower disc limiting area, Fig. 14 is a pin hole, Fig. 15 is a connecting hole, Fig. 16 is a U-shaped pin, Fig. 17 is a notch, Fig. 21 is an upper disc positioning frame, Fig. 22 is a pin, and Fig. 23 is an upper disc limiting area. DETAILED DESCRIPTION

[0030] In order to make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings for the embodiments of the present application to make a clear and complete description of the technical solutions of the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0031] An auxiliary device for sample setting in a mechanical test of tunnel surrounding rock, as shown in Figures 2-7 Fig. 1, comprises a lower disc positioning assembly 1 and an upper disc positioning assembly 2. The lower disc positioning assembly comprises a lower disc positioning disc 11 and a support rod 12. The lower disc positioning disc 11 is in a circular ring shape, and a lower disc limiting area 13 is arranged in the middle of the circular ring. At least three support rods 12 vertically penetrate the lower disc positioning disc 11 and are fixedly arranged with the lower disc positioning disc 11. The support rods 12 are arranged along the circumference of the lower disc positioning disc 11. The upper disc positioning assembly 2 comprises an upper disc positioning frame 21. The number of the upper disc positioning frames 21 is the same as that of the support rods 12. One end of the upper disc positioning frame 21 is detachably connected to the support rod 12, and the other end extends to the center of the circular ring. The upper surface of the upper disc positioning frame 21 is perpendicular to the support rod 12. The upper surface of the upper disc positioning frame 21 is provided with an upper disc limiting area 23.

[0032] Further, a plurality of pin holes 14 are arranged on the support rod 12 along the axial direction. One end of the upper disc positioning frame 21 is clamped to the outer periphery of the support rod 12 and is connected by at least two pins 22. The top surface of the upper disc positioning frame 21 is provided with a limiting protrusion 24. The limiting protrusions 24 of a plurality of upper disc positioning frames enclose the upper disc limiting area 23. When the upper disc A of the test system is installed, the upper disc A is placed on the top surface of the upper disc positioning frame 21, and the outer periphery of the upper disc A is limited by the limiting protrusion 24. Preferably, the bottom surface of the upper disc positioning frame 21 is inclined, as shown in Figure 6 Fig. 2, the front view of the upper disc positioning frame 21 is in the shape of a right triangle. The inclined bottom surface can act as a diagonal brace, and the stability is better.

[0033] Further, the lower disc positioning disc 11 is provided with a circular groove in the middle, and the inside of the circular groove is a lower disc limiting area 13, and the depth of the circular groove is less than the thickness of the lower disc. When installing the lower disc B of the test system, the lower disc B is placed in the circular groove of the lower disc positioning disc 21, the bottom surface of the lower disc B is limited by the circular groove, the fixing screw of the lower disc protrudes from the top surface of the lower disc fixing disc 21, and the fixing screw is not hindered. The circular groove is provided with a notch 17, which facilitates the installation of the sensor fixed on the lower disc.

[0034] Further, the lower disc positioning disc 11 is assembled by two semicircular rings, and the two semicircular rings of the lower disc positioning disc 11 are provided with connecting holes 15 on both sides of the splicing joint, and the two semicircular rings are connected through a U-shaped bolt 16. Preferably, the splicing joint of the two semicircular rings of the lower disc positioning disc 11 is in the shape of a broken line, and the splicing joint can also be provided with a lap joint edge, so as to ensure the assembly precision. The bottom of the supporting rod 12 can be provided with a support, so as to ensure the stability of the whole.

[0035] When the surrounding rock test sample is installed, first, the lower disc positioning assembly 1 is combined outside the test system, the test sample is placed at the center of the device, then the lower disc B of the test system is placed in the lower disc limiting area of the lower disc positioning disc 11, and the fixing screw is alternately tightened to fix the lower disc B; then the radial sensor J is installed; the appropriate bolt hole 14 (generally, the distance between the upper disc and the lower disc is 75-85mm) is selected, the upper disc positioning frame 21 is fixed on the supporting rod 12 through the bolt 22, the upper disc A of the test system is installed, the axial sensor G and the magnetic steel rod H are aligned through the upper and lower disc positioning holes and the positioning rod C, and the screw is tightened to fix the upper disc A; after the upper disc A is fixed, the upper disc positioning assembly and the lower disc positioning assembly are removed in turn, the parameters are adjusted, and the rock mechanics experiment is carried out.

[0036] Of course, the present application can also have other various embodiments, and those skilled in the art can make various corresponding changes and modifications according to the present application without departing from the spirit and essence of the present application, but these corresponding changes and modifications should belong to the protection scope of the claims attached to the present application.

Claims

1. An auxiliary sample setting device for a tunnel surrounding rock mechanics test, characterized in that: The application relates to a positioning device for a lower disc and an upper disc, which comprises a lower disc positioning assembly (1) and an upper disc positioning assembly (2); the lower disc positioning assembly comprises a lower disc positioning disc (11) and support rods (12), the lower disc positioning disc (11) is in the shape of a circular ring, a lower disc limiting area (13) is arranged in the middle of the circular ring, at least three support rods (12) vertically penetrate the lower disc positioning disc (11) and are fixedly arranged on the lower disc positioning disc (11), and the support rods (12) are arranged along the circumference of the lower disc positioning disc (11); the upper disc positioning assembly (2) comprises upper disc positioning frames (21), the number of the upper disc positioning frames (21) is the same as that of the support rods (12), one end of the upper disc positioning frame (21) is detachably connected to the support rod (12), the other end of the upper disc positioning frame (21) extends to the center of the circular ring, the upper surface of the upper disc positioning frame (21) is perpendicular to the support rod (12), and the upper surface of the upper disc positioning frame (21) is provided with an upper disc limiting area (23).

2. The auxiliary sample setting device for the tunnel surrounding rock mechanics test test of claim 1, characterized in that: A plurality of bolt holes (14) are arranged on the support rod (12) along the axial direction of the support rod (12), and one end of the upper disc positioning frame (21) is clamped on the outer periphery of the support rod (12) and is connected through at least two bolts (22).

3. The auxiliary sample setting device for the tunnel surrounding rock mechanics test test of claim 1, characterized in that: The top surface of the upper disc positioning frame (21) is provided with a limiting protrusion (24), and the limiting protrusions (24) of the plurality of upper disc positioning frames enclose the upper disc limiting area (23).

4. The auxiliary device for sample preparation of the tunnel surrounding rock mechanics test test according to claim 1, characterized in that: The bottom surface of the upper disc positioning frame (21) is in the shape of an inclined plane.

5. The auxiliary sample setting device for the tunnel surrounding rock mechanics test test of claim 1, characterized in that: The middle part of the lower disc positioning disc (11) is provided with a circular groove, the circular groove is the lower disc limiting area, and the depth of the circular groove is smaller than the thickness of the lower disc.

6. The auxiliary sample setting device for the test of tunnel surrounding rock mechanics according to claim 5, characterized in that: The circular groove is provided with a notch.

7. The auxiliary device for sample preparation of the test of tunnel surrounding rock mechanics according to claim 1, characterized in that: The lower disc positioning disc (11) is assembled by two semicircular rings.

8. The auxiliary device for sample preparation of the tunnel surrounding rock mechanics test test according to claim 7, characterized in that: Connecting holes (15) are arranged on both sides of the joint seam of the two semicircular rings of the lower disc positioning disc (11), and the two semicircular rings are connected through a U-shaped bolt (16).

9. The auxiliary device for sample preparation of the tunnel surrounding rock mechanics test test according to claim 7, characterized in that: The joint seam of the two semicircular rings of the lower disc positioning disc (11) is in the shape of a fold line.

10. The auxiliary device for sample preparation of the tunnel surrounding rock mechanics test test according to claim 7, characterized in that: The joint of the two semicircular rings of the lower disc positioning disc (11) is provided with a lap joint edge.

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