Concealed joint-tunnel combined model sample preparation device

Abstract

The hidden joint-tunnel combined model sample preparation device comprises a shell, a tunnel component and a joint component, an opening is formed in the upper end of the shell, and the shell comprises a bottom plate and a side plate which are fixedly connected; the tunnel component is fixedly arranged on the bottom plate; the joint component comprises a joint plate and an adjusting assembly, the joint plate is detachably connected with the side plate through the adjusting assembly, and the joint plate extends into the shell. Compared with the prior art, the hidden joint-tunnel combined model sample preparation device provided by the utility model has the advantages that the tunnel structure and the joint cavity are respectively formed by the tunnel component and the joint component during pouring, and the joint rock mass structure is formed by filling the joint cavity, so that the hidden joint-tunnel combined model sample is rapidly prepared, the manufacturing method is simple, and the operation is convenient. The manufacturing cost is low.

Description

TECHNICAL FIELD

[0001] The utility model relates to experimental apparatus technical field, specifically relates to a recessional joint - tunnel combination model sample preparation device. BACKGROUND

[0002] Under the long geological action, natural rock mass often contains primary joint, structural joint or non-structural joint. Current relevant research and engineering practice show that these joint rock mass is extremely easy to produce geological disasters such as spalling, collapse, local peeling under excavation unloading, and has become the key factor influencing the stability of surrounding rock of underground cavern.

[0003] At present, the increasing energy, resource and traffic rigid demand in China promotes water and electricity development, tunnel construction and mining to further develop to the deep underground, and the instability and failure of deep high stress underground cavern joint rock mass under excavation unloading will be increasingly intense and universal, which will become the key factor influencing the construction safety and long-term stability of deep underground cavern. Therefore, revealing the instability and disaster mechanism of joint rock mass becomes the research hotspot of ensuring large deep underground engineering construction.

[0004] A large number of scholars carry out a series of stability and failure characteristics researches on joint-tunnel combination system through theoretical analysis, field monitoring, numerical simulation, physical model test and other means. Among them, the biaxial compression test of joint-tunnel combination model not only can truly reproduce the complex geological structure, stress loading path, full stress process of deep rock engineering, and has the advantages of high repeatability, safety and controllability, and is favored by the majority of scientific researchers. At present, due to the advantages of high precision and convenient operation, the mechanical cutting method of wire cutting becomes the main means for preparing joint-tunnel combination rock sample. However, for hard rock, especially for recessional joint hard rock combination rock sample which is not penetrated in the tunnel, the long sample preparation period and high cost of wire cutting method have seriously restricted the preparation of a large number of rapid combination rock samples. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at overcoming the above technical deficiencies, and provides a recessional joint-tunnel combination model sample preparation device, which solves the technical problems of long preparation period and high cost of recessional joint hard rock combination rock sample in the prior art.

[0006] In order to achieve the above technical purpose, the utility model adopts the following technical scheme:

[0007] The utility model provides a recessional joint-tunnel combination model sample preparation device, which comprises: a shell, the upper end of the shell is open, and it comprises a fixedly connected bottom plate and side plate; a tunnel component is fixedly arranged on the bottom plate; a joint component comprises a joint plate and an adjusting assembly, the joint plate is detachably connected with the side plate through the adjusting assembly, and the joint plate extends into the shell.

[0008] In some embodiments, the shell comprises a rectangular bottom plate and four side plates, and the side plates are detachably connected with the bottom plate and the adjacent side plates.

[0009] In some embodiments, the bottom plate edge forms a groove, and the side plates are inserted into the groove and arranged in abutment with the side wall of the groove.

[0010] In some embodiments, the bottom plate has a threaded hole, and the lower bottom surface of the tunnel component also has a corresponding threaded hole, and the tunnel component is detachably connected with the bottom plate through a screw.

[0011] In some embodiments, the height of the tunnel component is higher than the height of the side plate, so that the upper end of the tunnel component protrudes out of the shell.

[0012] In some embodiments, the upper surface of the side plate is formed with a first sliding groove, and the adjustment assembly is slidably connected with one or a pair of first sliding grooves.

[0013] In some embodiments, the adjustment assembly comprises an adjustment rod, a first sliding block, a connecting rod and a second sliding block, the adjustment rod is fixedly connected with the first sliding block, the adjustment rod is slidably connected with the first sliding groove through the first sliding block, the adjustment rod is formed with a second sliding groove, the second sliding groove is communicated with the lower surface of the adjustment rod, the second sliding block is embedded in the second sliding groove and can slide and rotate in the second sliding groove, and the connecting rod is fixedly connected with the second sliding block and the jointing plate.

[0014] In some embodiments, the second sliding groove is also communicated with the upper surface of the adjustment rod, the upper end of the connecting rod extends upward above the adjustment rod, the upper part of the connecting rod is formed with an external thread, and the adjustment assembly further comprises a locking knob having a threaded hole and being connected with the connecting rod.

[0015] In some embodiments, the second sliding block has magnetism, and the second sliding block is further magnetically connected with the adjustment rod.

[0016] In some embodiments, the jointing plate is a rectangular plate.

[0017] Compared with the prior art, the hidden joint-tunnel combined model sample preparation device provided by the utility model utilizes the tunnel component and the joint component to respectively form a tunnel structure and a joint cavity during pouring, and then fills the joint rock mass structure in the joint cavity, so that the hidden joint-tunnel combined model sample is quickly prepared, the manufacturing method is simple, and the manufacturing cost is low. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The structure diagram of the hidden joint-tunnel combined model sample preparation device provided by the utility model is shown;

[0019] Figure 2 The Figure 1 exploded view of the shell. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the utility model more clear and understandable, the utility model is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model and do not limit the utility model.

[0021] In order to solve the technical problems of long preparation period and high cost of implicit joint-hard rock combined rock sample, the utility model provides an implicit joint-tunnel combined model sample preparation device, which can realize low-cost and rapid manufacturing of implicit joint-tunnel combined model.

[0022] Please refer to Figure 1 , Figure 1 The structure diagram of the implicit joint-tunnel combined model sample preparation device provided by the utility model embodiment. The implicit joint-tunnel combined model sample preparation device comprises: a shell 1, a tunnel part 2 and a joint part 3.

[0023] The shell 1 is open at the upper end, used for injecting solidified material into the shell 1. The shell 1 comprises a fixedly connected bottom plate 11 and side plate 12, and the side plate 12 is connected with the edge of the bottom plate 11 to form a mold cavity. The tunnel part 2 is fixedly arranged on the bottom plate 11, used for forming the cavity of the tunnel after the solidified material is solidified. The joint part 3 comprises a joint plate 31 and an adjusting assembly 32, and the joint plate 31 is detachably connected with the side plate 12 through the adjusting assembly 32. The joint plate 31 extends into the shell 1, used for forming a joint cavity, and then filling the joint rock mass structure in the joint cavity, so as to prepare the implicit joint-tunnel combined model sample.

[0024] Please refer to Figure 2 , Figure 2 For Figure 1 The exploded view of the shell. In some examples, the shell 1 comprises a rectangular bottom plate 11 and four side plates 12, and the side plate 12 is detachably connected with the bottom plate 11 and the adjacent side plate 12 through bolts or other connecting pieces to form a cubic mold cavity.

[0025] In the preferred embodiment, the edge of the bottom plate 11 forms a groove 111, and the side plate 12 is inserted into the groove 111 and arranged in abutment with the side wall of the groove 111. The depth of the groove 111 is about 2mm, which facilitates the demolding of the side plate 12 from the model.

[0026] In some examples, the bottom plate 11 has a threaded through hole, and the lower bottom surface of the tunnel part 2 also has a corresponding threaded hole, and the tunnel part 2 is detachably connected with the bottom plate 11 through a screw.

[0027] In some embodiments, the height of the tunnel component 2 is higher than the height of the side plate 12, so that the upper end of the tunnel component 2 protrudes out of the shell 1. The tunnel component 2 can be cylindrical, straight-walled arched, circular, horseshoe-shaped, etc., and the corresponding shape of the tunnel component 2 is pre-made according to the experimental needs, and the corresponding installation is selected.

[0028] In the present embodiment, the joint plate 31 is a rectangular plate. In other embodiments, other shapes of joint plates 31 can also be selected according to experimental needs.

[0029] In some embodiments, the upper surface of the side plate 12 is formed with a first sliding groove 121, and the adjusting assembly 32 is slidably connected with one or a pair of first sliding grooves 121, so as to change the position of the adjusting assembly 32.

[0030] In some embodiments, the adjusting assembly 32 includes an adjusting rod 321, a first sliding block 322, a connecting rod, and a second sliding block 323. The adjusting rod 321 is fixedly connected with the first sliding block 322, and the adjusting rod 321 is slidably connected with the first sliding groove 121 through the first sliding block 322. The adjusting rod 321 is formed with a second sliding groove, which is communicated with the lower surface of the adjusting rod 321, and the second sliding block 323 is embedded in the second sliding groove and can slide and rotate in the second sliding groove. The connecting rod is fixedly connected with the second sliding block 323 and extends out of the second sliding groove and is fixedly connected with the joint plate 31.

[0031] By sliding the first sliding block 322 in the first sliding groove 121 and sliding the second sliding block 323 in the second sliding groove, the position of the joint plate 31 can be changed. By rotating the second sliding block 323 in the second sliding groove, the angle of the joint plate 31 can be changed, so as to obtain different joint cavities.

[0032] In some embodiments, the second sliding block 323 has magnetism, and the second sliding block 323 is also magnetically connected with the adjusting rod 321. After the joint plate 31 is rotated to the desired angle, it plays a fixing role.

[0033] In other embodiments, in order to avoid the joint plate 31 from sliding or rotating when injecting the solidified material, a more secure fixation needs to be applied to the joint plate 31. The second sliding groove is also communicated with the upper surface of the adjusting rod 321, the upper end of the connecting rod extends upward above the adjusting rod 321, the upper part of the connecting rod is formed with external threads, and the adjusting assembly 32 further includes a locking knob 324, which has a threaded hole and is connected with the connecting rod. While limiting the rotation of the joint plate 31, the locking knob 324 is screwed, the adjusting rod 321 is rotated upward into the locking knob 324, the second sliding block 323 and the locking knob 324 cooperate to clamp the adjusting rod 321, and the fixation of the joint plate 31 is realized.

[0034] In order to better understand the present application, the following is combined with the description of the drawings Figure 1 andFigure 2 The specific manufacturing method is described in detail:

[0035] Step 1: Assemble the components of the hidden joint-tunnel combined model sample preparation device, and assemble the tunnel component 2 and the joint plate 31 according to the test requirements. Uniformly apply release agent to the inside of the shell 1, the surface of the tunnel component 2 and the joint plate 31, and wait at least 30 min until the release agent is completely dry.

[0036] Step 2: Select the main model material according to the test requirements. The requirements are that the material can be solidified, including cement mortar, concrete, resin, gypsum and mixed materials, etc. Pour the material into the shell 1, and use the vibration table to remove the internal bubbles.

[0037] Step 3: After curing to initial setting according to the characteristics of different materials, remove the adjusting assembly 32 and vertically take out the joint plate 31. According to the test requirements, select the joint filling material, which is generally required to have weaker mechanical properties than the main body material of the model, and pour it into the joint cavity formed by taking out the joint plate. Use the vibration table to remove the internal bubbles. According to the test requirements, the joint cavity can also be selected not to be filled.

[0038] Step 4: Put the poured shell 1 into the standard curing chamber for more than 28 days, unscrew all the bolts on the shell 1, remove the side plate 12, take out the model sample, and take out the tunnel component 2. The process of preparing the hidden joint-tunnel combined sample is completed.

[0039] The specific embodiments of the utility model described above do not constitute a limitation on the protection scope of the utility model. Any various other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the utility model claims.

Claims

1. A device for preparing a sample for a latent joint-tunnel combination model, characterized in that, The utility model relates to a tunneling and jointing device, comprising: a housing with an open upper end, comprising a fixedly connected bottom plate and side plates; a tunneling component fixedly arranged on the bottom plate; a jointing component comprising a jointing plate and an adjusting assembly, the jointing plate being detachably connected to the side plates through the adjusting assembly, the jointing plate extending into the housing.

2. The recessive joint-tunnel combination model sampling device according to claim 1, characterized in that, The housing comprises a rectangular bottom plate and four side plates, the side plates being detachably connected to the bottom plate and adjacent side plates.

3. The recessive joint-tunnel combination model sampling device according to claim 2, characterized in that, The bottom plate has a groove formed at the edge thereof, and the side plates are inserted into the groove and arranged in abutment with the side walls of the groove.

4. The cryptic joint-tunnel combination model sampling device of claim 1, wherein, The bottom plate has a threaded through hole, and the lower bottom surface of the tunneling component also has a corresponding threaded hole, the tunneling component being detachably connected to the bottom plate through a screw.

5. The recessive joint-tunnel combination model sampling device according to claim 1, wherein, The height of the tunneling component is higher than the height of the side plates, so that the upper end of the tunneling component protrudes out of the housing.

6. The recessive joint-tunnel combination model sampling device according to claim 1, wherein, The upper surface of the side plates is formed with first sliding grooves, and the adjusting assembly is slidably connected to one or a pair of the first sliding grooves.

7. The recessive joint-tunnel combination model sampling device according to claim 6, characterized in that, The adjusting assembly comprises an adjusting rod, a first sliding block, a connecting rod and a second sliding block, the adjusting rod being fixedly connected to the first sliding block, the adjusting rod being slidably connected to the first sliding grooves through the first sliding block, the adjusting rod being formed with second sliding grooves, the second sliding grooves being communicated with the lower surface of the adjusting rod, the second sliding block being embedded in the second sliding grooves and being slidable and rotatable in the second sliding grooves, and the connecting rod being fixedly connected to the second sliding block and the jointing plate.

8. The recessive joint-tunnel combination model sampling device according to claim 7, characterized in that, The second sliding grooves are also communicated with the upper surface of the adjusting rod, the upper end of the connecting rod extending upward above the adjusting rod, the upper portion of the connecting rod being formed with external threads, and the adjusting assembly further comprises a locking knob having a threaded hole and being connected to the connecting rod.

9. The recessive joint-tunnel combination model sampling device according to claim 7, wherein, The second sliding block has magnetism and is magnetically connected to the adjusting rod.

10. The cryptic joint-tunnel combination model sampling device of claim 1, wherein, The jointing plate is a rectangular plate.

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