Rock mass freezing and thawing physical simulation test device

Abstract

The utility model relates to the technical field of rock mass freezing and thawing tests, in particular to a rock mass freezing and thawing physical simulation test device. The device comprises a temperature control box; the regulation and control system is electrically connected with the temperature control box; the force loading mechanism comprises a base tray which is arranged on a bottom plate of an inner chamber of the temperature control box; the frame-shaped base is connected to the top of the base tray; the pair of vertical plates are fixedly connected to the upper surface of the frame-shaped base and are oppositely arranged, and a rotatable guide polished rod and a threaded lead screw are arranged in the pair of vertical plates; the clamping plate is arranged between the pair of vertical plates, one end of the clamping plate is movably connected with the guide polish rod, and the other end of the clamping plate is spirally sleeved with the threaded lead screw. According to the utility model, the temperature control box and the regulation and control system can be used as a freezing and thawing box to carry out a rock freezing and thawing physical simulation test; through the design that the force loading mechanism is additionally arranged in the inner chamber of the temperature control box, a high-temperature or low-temperature environment provided by the temperature control box and a regulation and control system can be matched so as to carry out related rock-soil mechanical tests.

Description

Technical Field

[0001] The utility model relates to the technical field of rock mass freeze-thaw test, in particular to a rock mass freeze-thaw physical simulation test device. Background Art

[0002] Freeze-thaw cycles are one of the important causes of rock and soil damage and geological disasters in cold regions, especially in the special climate environment of high-cold mountainous areas such as the Qinghai-Tibet Plateau. The alternation of day and night and seasonal changes lead to significant temperature changes, which makes the engineering construction in the region suffer from severe freeze-thaw effects every year, seriously threatening the engineering construction and economic and social development in the plateau area. Therefore, studying the physical and mechanical properties of various rock masses in cold regions under the action of freeze-thaw cycles and revealing their damage and degradation mechanisms are of great practical significance for ensuring the long-term safety of engineering construction in high-cold mountainous areas such as the Qinghai-Tibet Plateau and promoting their economic and social development.

[0003] Existing freeze-thaw cycle physical simulation research is achieved through a temperature control box, but the existing temperature control box has a single function and most of them are only used to adjust the temperature.

[0004] To this end, the utility model proposes a rock freeze-thaw physical simulation test device, which can be used with a force loading device to provide an ideal low temperature or high temperature environment for related rock and soil mechanics tests, and can also be used as a freeze-thaw box to carry out rock freeze-thaw physical simulation tests. Utility Model Content

[0005] The utility model aims to provide a rock mass freeze-thaw physical simulation test device in view of the problems existing in the background technology.

[0006] The technical solution of the utility model: a rock freeze-thaw physical simulation test device, comprising: a temperature control box; a control system, electrically connected to the temperature control box; and a force loading mechanism, arranged in the inner chamber of the temperature control box, the force loading mechanism is used to carry out geotechnical mechanics tests in combination with the low temperature or high temperature environment provided by the temperature control box and the control system and comprises: a base tray, placed on the bottom plate of the inner chamber of the temperature control box; a frame base, connected to the top of the base tray; a pair of vertical plates, fixedly connected to the upper surface of the frame base and arranged relatively, a pair of the vertical plates being provided with a rotatable guide light rod and a threaded screw; and a clamping plate, arranged between the pair of the vertical plates, one end of the clamping plate being movably connected to the guide light rod, and the other end being spirally sleeved with the threaded screw.

[0007] In some embodiments, the force loading mechanism also includes: a top base plate fixedly connected to the top of a pair of vertical plates; a cylinder fixedly connected to the top of the top base plate; and a pressure plate located below the top base plate and fixedly connected to the bottom end of the piston rod of the cylinder.

[0008] In some embodiments, the bottom end of the piston rod of the cylinder moves through the top base plate to push the pressure plate to apply pressure to the rock and soil placed on the base tray in a vertical direction.

[0009] In some embodiments, the force loading mechanism further includes: a motor fixedly connected to the outer wall of one of the vertical plates, and the output shaft of the motor movably penetrates the vertical plate and is fixedly connected to the threaded screw.

[0010] In some embodiments, the base tray includes: a tray; and a rotating base rotatably connected to the tray.

[0011] In some embodiments, a placement groove is provided on the bottom plate of the inner chamber of the temperature control box for the tray to be inserted into.

[0012] In some embodiments, the outer annular surface of the tray is fixedly connected to a plurality of connecting shafts, the connecting shafts are connected to a spherical slider at one end away from the tray, and the inner annular surface of the rotating base is provided with an annular groove matching the spherical slider.

[0013] In some embodiments, the bottom of the frame-shaped base is fixedly connected to the upper surface of the rotating base.

[0014] In some embodiments, a box door is provided on the front side of the inner chamber of the temperature control box, and the box door is hinged on the side wall of the temperature control box.

[0015] In some embodiments, an observation window is provided on the box door for observing the test conditions in the temperature control box.

[0016] Compared with the prior art, the utility model has at least the following beneficial technical effects:

[0017] The present application can be used as a freeze-thaw box to conduct freeze-thaw physical simulation tests of rocks through the temperature control box and the control system; by adding a force loading mechanism to the inner chamber of the temperature control box, the high temperature or low temperature environment provided by the temperature control box and the control system can be used to conduct relevant geotechnical mechanics tests, thereby realizing the study of the damage characteristics of rock mass under the action of external forces in low temperature or high temperature environments. In summary, the simulation test device has multiple functional effects.

[0018] Furthermore, the force loading mechanism in the present application can apply force to the rock mass in the horizontal and vertical directions when conducting relevant geotechnical mechanics tests, and can change the horizontal force direction without touching the rock and soil, such as changing the force applied in the front-to-back direction to the left-to-right direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] By reading the detailed description below with reference to the accompanying drawings, the above and other purposes, features and advantages of the embodiments of the present invention will become readily understood. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, wherein:

[0020] Figure 1 This is a structural schematic diagram of a rock mass freeze-thaw physical simulation test device;

[0021] Figure 2 for Figure 1 Schematic diagram of the structure after removing the force loading mechanism;

[0022] Figure 3 It is a structural schematic diagram of the force loading mechanism;

[0023] Figure 4 It is a schematic diagram of the structure of the base tray.

[0024] Figure numerals: 1. temperature control box; 11. placement groove; 2. box door; 3. observation window; 4. control system; 5. force loading mechanism; 51. base tray; 511. tray; 5111. connecting shaft; 51111. spherical slider; 512. rotating base; 5121. annular slide groove; 52. frame base; 521. vertical plate; 5211. guide light rod; 5212. threaded screw; 53. splint; 54. motor; 55. top base plate; 56. cylinder; 57. pressure plate. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] As mentioned above, the existing freeze-thaw cycle physical simulation research is achieved through a temperature control box, but the existing temperature control box has a single function. In view of the above problems, the device according to each embodiment of the utility model is provided with a temperature control box, a control system and a force loading mechanism, and the force loading mechanism includes: a base tray, which is placed on the bottom plate of the inner chamber of the temperature control box; a frame-type base, which is connected to the top of the base tray; a pair of vertical plates, which are fixedly connected to the upper surface of the frame-type base and arranged relatively, and a pair of vertical plates are provided with a rotatable guide light rod and a threaded screw; and a clamp, which is arranged between the pair of vertical plates, one end of the clamp is movably connected to the guide light rod, and the other end is spirally sleeved with the threaded screw. In this way, the temperature control box and the control system can be used as a freeze-thaw box to carry out freeze-thaw physical simulation tests of rocks; by adding a force loading mechanism to the inner chamber of the temperature control box, the high temperature or low temperature environment provided by the temperature control box and the control system can be matched to carry out relevant geotechnical mechanics tests. In particular, it can be used to study the changes in the mechanical properties of rock mass under extreme weather conditions (alternating low and high temperatures), and to explore the basic strength indicators, constitutive relations of the mechanical properties of rock mass, and the changing laws under many factors such as freeze-thaw cycles.

[0029] The following will combine Figures 1 to 4 Exemplary embodiments of the present invention are introduced.

[0030] Figure 1 This is a schematic diagram of the structure of the rock mass freeze-thaw physical simulation test device. Figure 1 As shown, a rock freeze-thaw physical simulation test device proposed by the utility model includes an electrically connected temperature control box 1 and a control system 4, and the control system 4 can adjust the temperature and humidity of the temperature control box 1. The front side of the inner chamber of the temperature control box 1 is hinged with a box door 2, and the box door 2 is provided with an observation window 3 for conveniently observing the test conditions in the inner chamber. In one embodiment, the temperature control box 1 can adopt a multifunctional temperature control box, and its temperature can be set to a low temperature or high temperature environment for rock freeze-thaw physical simulation in different environments.

[0031] like Figure 1 As shown, the inner chamber of the temperature control box 1 is provided with a force loading mechanism 5, which is used to perform geotechnical mechanics tests in the low or high temperature environment provided by the temperature control box 1 and the control system 4. Figures 2 to 4To introduce the exemplary structure of the force loading mechanism 5. Among them, Figure 2 for Figure 1 Schematic diagram of the structure after removing the force loading mechanism. Figure 3 is the structural diagram of the force loading mechanism. Figure 4 It is a schematic diagram of the structure of the base tray.

[0032] like Figure 2 As shown, the temperature control box 1, the box door 2, the observation window 3 and the control system 4 of the device can be used as follows Figure 1 The same structure as shown. Figure 2 In the embodiment, a placement groove 11 is provided on the inner chamber bottom plate of the temperature control box 1 , and the placement groove 11 is used to receive the force loading mechanism 5 .

[0033] In one embodiment, Figure 3 and Figure 4 As shown, the force loading mechanism 5 may include a base tray 51, the base tray 51 includes a tray 511 and a rotating base 512, the bottom end of the tray 511 is inserted into the placement groove 11, the outer ring surface of the tray 511 is fixedly connected to four connecting shafts 5111, the end of the connecting shaft 5111 away from the tray 511 is connected to a spherical slider 51111, and the inner ring surface of the rotating base 512 is provided with an annular groove 5121 matching the spherical slider 51111. It should be noted that although the connecting shafts 5111 are shown as 4, any other suitable number of connecting shafts can also be used, and the utility model does not limit this. It should be understood that when the number of connecting shafts 5111 is more, the force threshold of the entire structure is greater.

[0034] In one embodiment, Figure 3 As shown, the force loading mechanism 5 may also include a frame-type base 52 connected to the top of the rotating base 512, a pair of vertical plates 521 fixedly connected to the upper surface of the frame-type base 52, a guide light rod 5211 and a threaded lead screw 5212 rotatably connected between the pair of vertical plates 521, and a pair of clamping plates 53 located between the pair of vertical plates 521, one end of the clamping plate 53 is movably connected to the guide light rod 5211, and the other end of the clamping plate 53 is spirally sleeved with the threaded lead screw 5212. The force loading mechanism 5 also includes a motor 54 fixedly connected to the outer wall of one of the vertical plates 521, and the output shaft of the motor 54 movably penetrates the vertical plate 521 and is fixedly connected to the end of the threaded lead screw 5212.

[0035] Continue to refer Figure 3 In one embodiment, the force loading mechanism 5 may also include a top base plate 55 fixedly connected to the top of a pair of vertical plates 521, and a cylinder 56 fixedly connected to the top of the top base plate 55. The bottom end of the piston rod of the cylinder 56 is movable through the top base plate 55 and is fixedly connected to a pressure plate 57 located below the top base plate 55. The pressure plate 57 is used to apply pressure to the rock and soil placed on the base tray 51 in the vertical direction.

[0036] Through the above arrangement, the temperature control box 1 and the control system 4 can be used as a freeze-thaw box to perform freeze-thaw physical simulation tests on rocks; by adding a force loading mechanism 5 to the inner chamber of the temperature control box 1, the high temperature or low temperature environment provided by the temperature control box 1 and the control system 4 can be used to perform relevant geotechnical mechanics tests. When the force loading mechanism 5 is used to perform relevant geotechnical mechanics tests, forces can be applied to the rock mass in the horizontal and vertical directions, and the direction of the horizontal force can be changed without touching the rock and soil, such as changing the force applied in the front-to-back direction to the force applied in the left-to-right direction.

[0037] In one embodiment, specifically, the rotating base 512 is rotated horizontally, and the rotating base 512 can drive the frame base 52 and the structures thereon to rotate together, so that the pair of vertical plates 521 rotate to the front-back direction or the left-right direction. Then, the output shaft of the motor 54 drives the threaded screw 5212 to rotate, and the threaded screw 5212 drives the two clamping plates 53 to move in the opposite direction through the spiral connection between the two clamping plates 53. When the two clamping plates 53 are close to each other, the rock and soil placed on the tray 511 can be horizontally squeezed to perform a physical simulation test.

[0038] In addition, when mechanical tests are performed on rock and soil in the vertical direction, the piston rod of the cylinder 56 is vertically extended and retracted to drive the pressing plate 57 to move vertically. When the pressing plate 57 moves downward, the rock and soil placed on the tray 511 can be vertically squeezed.

[0039] During the above operation, the tray 511 and the rock and soil thereon remain stationary, and the rotating base 512 is rotated alone to adjust the horizontal force direction. In other embodiments, the rotating base 512 may be kept stationary, and the tray 511 and the rock and soil thereon may be rotated alone, which can also achieve the effect of adjusting the force direction, and no matter how the rotation is performed, the rock and soil do not need to be touched, thereby preventing the debris and sharp protrusions on the rock and soil from injuring the hands.

[0040] In summary, the present application can be used as a freeze-thaw box to conduct freeze-thaw physical simulation tests of rocks through the temperature control box and the control system; by adding a force loading mechanism to the inner chamber of the temperature control box, the high temperature or low temperature environment provided by the temperature control box and the control system can be used to conduct relevant geotechnical mechanics tests, thereby realizing the study of the damage characteristics of the rock mass under the action of external forces in a low temperature or high temperature environment. In summary, the simulation test device has multiple functional effects; moreover, the force loading mechanism in the present application can apply force to the rock mass in the horizontal and vertical directions when conducting relevant geotechnical mechanics tests, and can change the horizontal force direction without touching the rock and soil, such as changing the force applied in the front-to-back direction to the force applied in the left-to-right direction.

[0041] Although several specific implementation details are included in the above discussion, these should not be interpreted as limiting the scope of the present invention. Certain features described in the context of a separate embodiment may also be implemented in a single implementation in combination. On the contrary, the various features described in the context of a single implementation may also be implemented in multiple implementations individually or in any suitable sub-combination.

[0042] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A rock mass freeze-thaw physical simulation test device, characterized in that: include: Temperature control box (1); A control system (4) electrically connected to the temperature control box (1); as well as A force loading mechanism (5) is arranged in the inner chamber of the temperature control box (1), and the force loading mechanism (5) is used to perform geotechnical mechanics tests in a low temperature or high temperature environment provided by the temperature control box (1) and the control system (4), and comprises: A base tray (51) is placed on the bottom plate of the inner chamber of the temperature control box (1); A frame-shaped base (52) connected to the top of the base tray (51); A pair of vertical plates (521) are fixedly connected to the upper surface of the frame-shaped base (52) and arranged opposite to each other, wherein a rotatable guide light rod (5211) and a threaded lead screw (5212) are arranged in the pair of vertical plates (521); and The clamping plate (53) is arranged between the pair of vertical plates (521), one end of the clamping plate (53) is movably connected to the guide light rod (5211), and the other end is spirally sleeved with the threaded lead screw (5212).

2. The rock mass freeze-thaw physical simulation test device according to claim 1, characterized in that: The force loading mechanism (5) further comprises: A top base plate (55) fixedly connected to the top of a pair of vertical plates (521); A cylinder (56) fixedly connected to the top of the top base plate (55); and A pressure plate (57) is located below the top base plate (55) and is fixedly connected to the bottom end of the piston rod of the cylinder (56).

3. The rock mass freeze-thaw physical simulation test device according to claim 2, characterized in that: The bottom end of the piston rod of the cylinder (56) moves through the top base plate (55) to push the pressure plate (57) to apply pressure to the rock and soil placed on the base tray (51) in the vertical direction.

4. The rock mass freeze-thaw physical simulation test device according to claim 1, characterized in that: The force loading mechanism (5) further comprises: The motor (54) is fixedly connected to the outer wall of one of the vertical plates (521), and the output shaft of the motor (54) movably passes through the vertical plate (521) and is fixedly connected to the threaded screw (5212).

5. The rock mass freeze-thaw physical simulation test device according to claim 1, characterized in that: The base tray (51) comprises: a tray (511); and The rotating base (512) is rotatably connected to the tray (511).

6. The rock mass freeze-thaw physical simulation test device according to claim 5, characterized in that: The inner chamber bottom plate of the temperature control box (1) is provided with a placement groove (11) for the tray (511) to be inserted into.

7. The rock mass freeze-thaw physical simulation test device according to claim 5, characterized in that: The outer ring surface of the tray (511) is fixedly connected to a plurality of connecting shafts (5111), and the connecting shafts (5111) are connected to a spherical slider (51111) at one end away from the tray (511), and the inner ring surface of the rotating base (512) is provided with an annular sliding groove (5121) matching the spherical slider (51111).

8. The rock mass freeze-thaw physical simulation test device according to claim 5, characterized in that: The bottom of the frame-shaped base (52) is fixedly connected to the upper surface of the rotating base (512).

9. The rock mass freeze-thaw physical simulation test device according to claim 1, characterized in that: A box door (2) is provided on the front side of the inner chamber of the temperature control box (1), and the box door (2) is hinged on the side wall of the temperature control box (1).

10. The rock mass freeze-thaw physical simulation test device according to claim 9, characterized in that: The box door (2) is provided with an observation window (3) for observing the test conditions in the temperature control box (1).

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