Auxiliary device for triaxial test optical cable-concrete coupling test

Abstract

The utility model relates to an optical cable-concrete coupling test auxiliary device for a triaxial test, which comprises the following components: a base which is uniformly provided with a plurality of fixing holes in a ring shape; the fixing columns are evenly distributed on the base, studs are arranged at the two ends of each fixing column, and the studs penetrate through the fixing holes and then are connected with the base through nut assemblies; the connecting plates are detachably arranged on the inner sides of the fixing columns through bolt assemblies, and the sections of the connecting plates are in an angular shape or an arc shape; the plurality of spacing plates are connected and arranged between two adjacent connecting plates, so that the plurality of spacing plates and the connecting plates define a columnar casting mold; the top cover is arranged at the top of the pouring mold, a plurality of top plate fixing holes are annularly and uniformly formed in the top cover, and the studs penetrate through the top plate fixing holes and then are connected with the top cover through nut assemblies; and optical fiber channels are oppositely formed in the top cover and the base. According to the auxiliary device, the optical fiber can be placed in a concrete soil body, demolding treatment is not needed after sample preparation is completed, and samples with various section shapes can be prepared.

Description

Technical Field

[0001] The utility model relates to the technical field of geotechnical engineering tests, in particular to an auxiliary device for triaxial test optical cable-concrete coupling testing. Background Art

[0002] With the advancement of science and technology, distributed fiber optic technology, with its long-distance, high-spatial-resolution continuous monitoring characteristics, has made it possible to monitor the internal deformation of rock and soil in deep environments in real time. Conducting concrete-fiber coupling tests under multi-level confining pressure in deep earth can better simulate the deformation of concrete in deep high-pressure environments and explore the damage mechanism of large stresses in deep earth environments on concrete. In actual engineering, the deformation of concrete structures requires internal deformation testing. At present, the coupling research between optical cables and concrete mostly adopts surface fixing. The data obtained by this test method is usually different from the actual deformation data. In addition, the mold processing is usually required during the test, and demolding is required after pouring the concrete. The operation is dangerous and cumbersome. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an auxiliary device which can place optical fibers inside concrete soil, does not require demoulding after sample preparation is completed, can directly perform high confining pressure testing on the processed concrete structure, and can prepare samples of various cross-sectional shapes.

[0004] In order to solve the above problems, the technical solution adopted by the present invention is:

[0005] An auxiliary device for triaxial optical cable-concrete coupling testing, comprising:

[0006] A base having a plurality of fixing holes evenly arranged in a ring shape;

[0007] A plurality of fixing columns are evenly distributed on the base, and studs are provided at both ends of the fixing columns. After the studs pass through the fixing holes, nut assemblies are applied to fix them to the base;

[0008] a plurality of connecting plates, each of which is detachably mounted on the inner side of the fixing column by a bolt assembly, and each of which has an angular or arc-shaped cross section;

[0009] A plurality of intermediate plates are connected and arranged between two adjacent connecting plates, so that the intermediate plates and the connecting plates form a columnar casting mold;

[0010] A top cover is provided on the top of the casting mold and has a plurality of top plate fixing holes evenly opened in a ring shape. The studs pass through the top plate fixing holes and are fixedly connected to the top cover by applying nut assemblies;

[0011] Optical fiber channels are relatively opened on the top cover and the base for placing the optical fiber into the casting mold.

[0012] As an embodiment of the present invention, a plurality of optical fiber through holes are evenly opened on the base inside the plurality of fixing holes;

[0013] The top cover is provided with a plurality of optical fiber exit slots extending vertically therethrough, one end of each optical fiber exit slot passing through the edge of the top cover;

[0014] A short slot is provided on the top cover, one end of the short slot corresponds to the optical fiber through hole to form the optical fiber channel, and the other end of the short slot is connected to the end of the optical fiber exit groove.

[0015] As an embodiment of the present invention, the width of the short slot is greater than the width of the optical fiber exit slot, and the short slot is pluggable and provided with a limiting plug. The limiting plug includes a plug body and a handle portion provided on the plug body. The size and shape of the plug body correspond to the size and shape of the short slot, and one end of the plug body is provided with a yield groove corresponding to the optical fiber for limiting the optical fiber.

[0016] As an embodiment of the present invention, the cross section of the connecting plate is angular, and the cross section of the intermediate plate is flat, so that the cross section of the casting mold is a regular polygon.

[0017] As an embodiment of the present invention, the cross section of the connecting plate is arc-shaped, and the cross section of the intermediate plate is arc-shaped with the same curvature as the connecting plate, so that the cross section of the casting mold is circular.

[0018] As an embodiment of the present invention, a connecting plate flat portion is provided on the side of the connecting plate facing the fixing column, the connecting plate flat portion is abutted against the inner side of the fixing column, a plurality of flat threaded holes are vertically spaced apart on the connecting plate flat portion, and countersunk holes are provided on the fixing column corresponding to the flat threaded holes for passing screw assemblies to fix the fixing column and the connecting plate.

[0019] As an embodiment of the present invention, two vertical engaging grooves are symmetrically provided on both sides of the connecting plate, and a plurality of engaging groove threaded holes are vertically spaced apart on the engaging grooves;

[0020] Two vertical ribs are symmetrically arranged on both sides of the intermediate plate, and the size and shape of the cross-section of the ribs correspond to the size and shape of the cross-section of the fitting groove. The ribs are fitted into the fitting groove, and intermediate plate through holes are provided on the ribs corresponding to the threaded holes in the fitting groove for passing screw assemblies to connect the intermediate plate and the connecting plate.

[0021] As an embodiment of the present utility model, a plurality of telescopic pins are arranged at vertical intervals on the outside of the fixed column, a telescopic pin slider is provided at one end of the telescopic pin, a slider through hole is opened in the fixed column corresponding to the telescopic pin slider, the telescopic pin slider is slidably arranged in the slider through hole, a compression spring is provided between the end of the slider through hole and the telescopic pin slider, the compression spring is used to drive the telescopic pin slider to slide toward the hole opening of the slider through hole, thereby extending the telescopic pin, and a sealing plate is provided at the hole opening of the slider through hole to prevent the telescopic pin slider from sliding, and a telescopic pin through hole is opened on the sealing plate corresponding to the telescopic pin.

[0022] As an embodiment of the present invention, the end of the telescopic pin is hemispherical, and a plurality of groove structures are provided on the inner wall of the test cylinder for high confining pressure testing, and the positions of the groove structures correspond to the positions of the fixing holes on the base;

[0023] Each group of the groove structures includes a plurality of grooves arranged at intervals. The grooves are hemispherical and correspond to the telescopic pins, and are used for the ends of the telescopic pins to be embedded, thereby limiting the fixing column.

[0024] The beneficial effects of adopting the above technical solution are:

[0025] The base of the present application is provided with a number of fixing holes in a ring shape, which can be used to connect and install fixing columns. By adjusting the number and installation intervals of the fixing columns on the base, and cooperating with connecting plates and spacers of different shapes and sizes, columnar specimens with different cross-sectional shapes can be prepared to meet the needs of the test experiment.

[0026] The present application can place the optical fiber for testing in a casting mold surrounded by the intermediate plate and the connecting plate through the optical fiber channel, so as to arrange the optical fiber in the sample and obtain more accurate confining pressure test data.

[0027] A telescopic pin is provided on the outside of the fixed column of the present application. After the cast and solidified sample is completed, the nut assemblies at both ends of the fixed column are removed, and the top cover and the base are taken out, the sample can be placed in the confining pressure test cylinder together with the fixed column in the casting mold, eliminating the process of removing the casting mold, increasing the test efficiency, and simplifying the experimental process. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural diagram of an embodiment.

[0029] Figure 2 yes Figure 1 Schematic diagram of the structure from another angle.

[0030] Figure 3 2 is a schematic structural diagram of a base according to an embodiment.

[0031] Figure 42 is a schematic structural diagram of the top cover of the embodiment.

[0032] Figure 5 Schematic diagram of the fixing column, connecting plate and intermediate plate of the embodiment.

[0033] Figure 6 yes Figure 5 Schematic diagram of the structure from another angle.

[0034] Figure 7 2 is a schematic structural diagram of a countersunk hole and a telescopic pin in an embodiment.

[0035] Figure 8 2 is a schematic structural diagram of a confining pressure test device according to an embodiment.

[0036] Figure 9 It is a structural diagram of another implementation method of the embodiment.

[0037] Including: 100 base; 101 fixing hole; 102 optical fiber through hole; 103 support leg;

[0038] 200 fixed column; 201 countersunk hole; 202 telescopic pin; 202-1 telescopic pin slider; 202-2 compression spring; 203 stud;

[0039] 300 connecting plate; 301 connecting plate flat portion; 302 threaded hole in flat portion; 303 fitting groove; 304 threaded hole in fitting groove;

[0040] 400 inter-panel; 401 inter-panel ridge; 402 inter-panel through hole;

[0041] 500 top cover; 501 top plate fixing hole; 502 pouring hole; 503 vibrator hole; 504 short slot hole; 505 optical fiber exit slot; 506 limit plug;

[0042] 600 First test cylinder; 601 Second test cylinder; 602 Groove. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described clearly and completely below in conjunction with specific embodiments.

[0044] like Figures 1 to 7 The auxiliary device for triaxial optical cable-concrete coupling test shown includes:

[0045] The base 100 has a plurality of fixing holes 101 evenly arranged in a ring shape;

[0046] Four groups of fixing columns 200 are evenly distributed on the base 100. Both ends of the fixing columns 200 are provided with studs 203. The studs 203 pass through the fixing holes 101 and are fixedly connected to the base 100 with nut assemblies.

[0047] Four sets of connecting plates 300, each of which is detachably mounted on the inner side of the fixing column 200 by means of a bolt assembly, see Figure 1 and Figure 9 , the cross section of the connecting plate 300 is angular or arc-shaped;

[0048] Four groups of intermediate plates 400 are connected and arranged between two adjacent connecting plates 300, so that the intermediate plates 400 and the connecting plates 300 form a columnar casting mold;

[0049] The top cover 500 is mounted on top of the casting mold and is provided with a plurality of top plate fixing holes 501 arranged uniformly in a circular pattern. The studs 203 are inserted through the top plate fixing holes 501 and then secured to the top cover 500 with nuts. Optical fiber channels are provided on the top cover 500 and the base 100 for inserting optical fibers into the casting mold.

[0050] See also Figure 3 A plurality of optical fiber through holes 102 are evenly opened on the base 100 inside the plurality of fixing holes 101. Before casting, the optical fiber through holes where no optical fibers are placed need to be sealed with a base plug. The base plug is cylindrical as a whole, and the size and shape of its cross section correspond to the size and shape of the cross section of the optical fiber through hole 102.

[0051] See also Figure 4 The top cover 500 is provided with a plurality of fiber exit slots 505 extending vertically, one end of which extends through the edge of the top cover 500. A short slot 504 is also provided on the top cover 500. One end of each short slot 504 corresponds to the fiber through-hole 102 to form the fiber channel, and the other end of each short slot 504 communicates with the end of the fiber exit slot 505. After pouring and solidification, the upper end of the optical fiber (the portion protruding from the upper end surface of the specimen) can be separated from the top cover 500 through the fiber exit slot 505 to facilitate the next step of testing.

[0052] See also Figure 4The width of the short slot 504 is greater than that of the fiber exit slot 505. The short slot 504 is provided with a pluggable stopper 506. The stopper 506 comprises a stopper body and a handle disposed thereon. The size and shape of the stopper body correspond to those of the short slot 504. One end of the stopper body is provided with a recess corresponding to the optical fiber for retaining the optical fiber. In this embodiment, both ends of the optical fiber are clamped and retained in position by wire clamps, which respectively abut against the upper end surface of the top cover 500 and the lower end surface of the base 100 to ensure the stability of the optical fiber during concrete pouring.

[0053] See also Figure 9 The cross section of the connecting plate 300 is angular, and the cross section of the intermediate plate 400 is flat, so that the cross section of the casting mold is a regular polygon.

[0054] See also Figure 5 and Figure 6 The cross section of the connecting plate 300 is arc-shaped, and the cross section of the intermediate plate 400 is arc-shaped with the same curvature as that of the connecting plate 300, so that the cross section of the casting mold is circular.

[0055] See also Figure 5 and Figure 6 A connecting plate flat portion 301 is provided on the side of the connecting plate 300 facing the fixing column 200, and the connecting plate flat portion 301 abuts against the inner side of the fixing column 200. A plurality of flat threaded holes 302 are vertically spaced apart on the connecting plate flat portion 301, and countersunk holes 201 are provided on the fixing column 200 corresponding to the flat threaded holes 302 for passing screw assemblies to fix the fixing column 200 and the connecting plate 300. The connecting plate 300 is symmetrically provided with two vertical interlocking grooves 303 on either side, with a plurality of interlocking threaded holes 304 vertically spaced apart on the interlocking grooves 303. The interlocking plate 400 is symmetrically provided with two vertical interlocking ridges 401 on either side. The cross-sectional dimensions and shapes of the interlocking ridges 401 correspond to those of the interlocking grooves 303, and the interlocking ridges 401 are interlocked within the interlocking grooves 303. The interlocking ridges 401 are provided with interlocking through-holes 402 corresponding to the interlocking threaded holes 304 for receiving screw assemblies to connect the interlocking plate 400 to the connecting plate 300. In this embodiment, the interlocking ridges 401 are located outside the casting mold, facilitating both early assembly of the casting mold and disassembly after casting is complete.

[0056] See also Figures 5 to 7, a number of telescopic pins 202 are arranged at vertical intervals on the outside of the fixed column 200, and a telescopic pin slider 202-1 is provided at one end of the telescopic pin 202, and a slider through-hole is opened in the fixed column 200 corresponding to the telescopic pin slider 202-1, and the telescopic pin slider 202-1 is slidably set in the slider through-hole, and a compression spring 202-2 is provided between the end of the slider through-hole and the telescopic pin slider 202-1, and the compression spring 202-2 is used to drive the telescopic pin slider 202-1 to slide toward the hole of the slider through-hole, thereby extending the telescopic pin 202, and a sealing plate is provided at the hole of the slider through-hole to prevent the telescopic pin slider 202-1 from sliding, and a telescopic pin through-hole is opened on the sealing plate corresponding to the telescopic pin 202.

[0057] Combine Figure 8 The end of the telescopic pin 202 is hemispherical, and a plurality of groups of groove structures are provided on the inner wall (see the end of the first test cylinder 600 for details) of the test cylinder (divided into a first test cylinder 600 and a second test cylinder 601) for high confining pressure testing. The positions of the groove structures correspond to the positions of the fixing holes 101 on the base 100; each group of the groove structures includes a plurality of grooves 602 arranged at intervals, and the grooves 602 are hemispherical and correspond to the telescopic pin 202, and are used for the end of the telescopic pin 202 to be embedded, thereby limiting the position of the fixing column 200.

[0058] See also Figure 4 In this embodiment, three groups of pouring holes 502 are provided on the top cover 500 for placing the pouring head, and a vibrating rod through hole 503 is provided in the middle of the top cover 500 for placing the vibrating rod to adjust the porosity in the sample during the pouring process.

[0059] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An auxiliary device for triaxial optical cable-concrete coupling testing, characterized in that: It includes: A base (100) having a plurality of fixing holes (101) uniformly formed in a ring shape; A plurality of fixing columns (200) are evenly distributed on the base (100), and studs (203) are provided at both ends of the fixing columns (200). The studs (203) pass through the fixing holes (101) and are fixedly connected to the base (100) by applying nut assemblies; a plurality of connecting plates (300), the connecting plates (300) being detachably arranged on the inner side of the fixing column (200) via a bolt assembly, the cross section of the connecting plates (300) being angular or arc-shaped; A plurality of intermediate plates (400) are connected and arranged between two adjacent connecting plates (300), so that the intermediate plates (400) and the connecting plates (300) form a columnar casting mold; A top cover (500) is arranged on the top of the casting mold, and a plurality of top plate fixing holes (501) are evenly opened in a ring shape on the top cover. After the studs (203) pass through the top plate fixing holes (501), a nut assembly is applied to fix the studs (203) and the top cover (500). Optical fiber channels are provided on the top cover (500) and the base (100) for placing optical fibers into the casting mold.

2. The auxiliary device for triaxial optical cable-concrete coupling test according to claim 1, characterized in that , a plurality of optical fiber through holes (102) are evenly opened on the base (100) and located inside the plurality of fixing holes (101); The top cover (500) is provided with a plurality of optical fiber exit slots (505) that pass through from top to bottom, and one end of the optical fiber exit slot (505) passes through the edge of the top cover (500); A short slot (504) is provided on the top cover (500), one end of the short slot (504) corresponds to the optical fiber through hole (102) to form the optical fiber channel, and the other end of the short slot (504) is connected to the end of the optical fiber exit groove (505).

3. The auxiliary device for triaxial optical cable-concrete coupling test according to claim 2, characterized in that The width of the short slot (504) is greater than the width of the optical fiber exit slot (505), and the short slot (504) is pluggable and provided with a limit plug (506), the limit plug (506) comprising a plug body and a handle portion provided on the plug body, the size and shape of the plug body corresponding to the size and shape of the short slot (504), and one end of the plug body is provided with a clearance groove corresponding to the optical fiber for limiting the optical fiber.

4. The auxiliary device for triaxial optical cable-concrete coupling test according to claim 1, characterized in that The cross section of the connecting plate (300) is angular, and the cross section of the intermediate plate (400) is flat, so that the cross section of the casting mold is a regular polygon.

5. The auxiliary device for triaxial optical cable-concrete coupling test according to claim 1, characterized in that The cross section of the connecting plate (300) is arc-shaped, and the cross section of the intermediate plate (400) is arc-shaped with the same curvature as that of the connecting plate (300), so that the cross section of the casting mold is circular.

6. The auxiliary device for triaxial optical cable-concrete coupling test according to claim 1, characterized in that A connecting plate flat portion (301) is provided on one side of the connecting plate (300) facing the fixing column (200), the connecting plate flat portion (301) abuts against the inner side of the fixing column (200), a plurality of flat threaded holes (302) are vertically spaced apart on the connecting plate flat portion (301), and countersunk holes (201) are provided on the fixing column (200) corresponding to the flat threaded holes (302) for passing screw assemblies to fix the fixing column (200) and the connecting plate (300).

7. The auxiliary device for triaxial optical cable-concrete coupling test according to claim 1, characterized in that Two vertical engaging grooves (303) are symmetrically provided on both sides of the connecting plate (300), and a plurality of engaging groove threaded holes (304) are vertically spaced apart on the engaging grooves (303); Two vertical inter-plate ribs (401) are symmetrically provided on both sides of the inter-plate (400), and the size and shape of the cross section of the inter-plate ribs (401) correspond to the size and shape of the cross section of the fitting groove (303). The inter-plate ribs (401) are fitted into the fitting groove (303), and inter-plate through holes (402) are provided on the inter-plate ribs (401) corresponding to the threaded holes (304) of the fitting groove for passing screw assemblies to connect the inter-plate (400) and the connecting plate (300).

8. The auxiliary device for triaxial optical cable-concrete coupling test according to claim 1, characterized in that A plurality of telescopic pins (202) are vertically spaced apart on the outside of the fixed column (200), a telescopic pin slider (202-1) is provided at one end of the telescopic pin (202), a slider through-hole is provided on the fixed column (200) corresponding to the telescopic pin slider (202-1), the telescopic pin slider (202-1) is slidably provided in the slider through-hole, a compression spring (202-2) is provided between the end of the slider through-hole and the telescopic pin slider (202-1), the compression spring (202-2) is used to drive the telescopic pin slider (202-1) to slide toward the opening of the slider through-hole, thereby extending the telescopic pin (202), a sealing plate is provided at the opening of the slider through-hole for preventing the telescopic pin slider (202-1) from sliding, and a telescopic pin through-hole is provided on the sealing plate corresponding to the telescopic pin (202).

9. The auxiliary device for triaxial optical cable-concrete coupling test according to claim 8, characterized in that The end of the telescopic pin (202) is hemispherical, and a plurality of groove structures are provided on the inner wall of the test cylinder for high confining pressure testing, and the positions of the groove structures correspond to the positions of the fixing holes (101) on the base (100); Each group of the groove structures includes a plurality of grooves (602) arranged at intervals, wherein the grooves (602) are hemispherical and correspond to the telescopic pins (202), and are used for the ends of the telescopic pins (202) to be embedded, thereby limiting the position of the fixing column (200).

Images