Fabricated tunnel lining model device and use method

Abstract

The invention discloses an assembly type tunnel lining model device and a using method. The device comprises a lower template, an inner mold pipe, an outer mold pipe and an upper template. The inner mold pipe is arranged on the lower mold plate and comprises a plurality of inner mold fragments, splicing gaps are formed between the inner mold fragments, and at least one splicing gap is filled with a plastic material. The outer mold pipe is arranged on the lower mold plate, the outer mold pipe comprises a plurality of outer mold fragments, the outer mold pipe is arranged outside the inner mold pipe in a sleeving mode, and a pouring space is defined by the outer mold pipe and the inner mold pipe. The upper mold plate is installed at the top ends of the inner mold pipe and the outer mold pipe, the upper mold plate and the lower mold plate are connected through a connecting structure so as to fix the inner mold pipe and the outer mold pipe, and the upper mold plate is provided with a grouting opening communicated with the pouring space. According to the assembly type tunnel lining model device and the using method, the gap is filled with the plastic material before pouring, after pouring, curing and hardening, the plastic material in the gap is removed, the effect that the masonry and the inner mold are separated in a fragmented mode is achieved through pressure relief, and the masonry can be conveniently separated from the inner mold pipe.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel model tests, and particularly to an assembled tunnel lining model device and a using method thereof. Background Art

[0002] In order to study the structural stress characteristics of shield tunnels under some special working conditions, model tests are often carried out, such as full-scale tests, reduced-scale tests, etc. The full-scale test of shield tunnels has problems such as large required site, high test cost, and complex loading system. While the reduced-scale test can be carried out in a smaller space and at a lower cost. Therefore, after the shield tunnel is scaled down, conducting model test research is the main method currently adopted.

[0003] Tunnel model tests rely on the production of lining models. Since most of the existing lining models are made of reinforced gypsum, it is necessary to prefabricate molds for gypsum pouring. Currently, tunnel lining molds generally include an outer mold and an inner mold. The cavity between the outer mold and the inner mold is used for pouring gypsum to form a tunnel lining model.

[0004] However, after the gypsum is poured in the mold of the annular circular pipe, it is often difficult to take out due to the adhesion between the gypsum and the mold, resulting in difficulties in demolding. Especially when pouring the whole ring, the inner mold is extruded by the gypsum wrapping, and its removal is extremely difficult, time-consuming and laborious, and it is easy to cause damage to the model, which cannot well meet the requirements of convenience and speed in the test. Summary of the Invention

[0005] Based on this, it is necessary to provide an assembled tunnel lining model device and a using method thereof for the problem that the existing tunnel lining mold has the problem that the gypsum extrudes the inner mold, resulting in difficulties in demolding the inner template.

[0006] An assembled tunnel lining model device includes:

[0007] A lower template;

[0008] An inner mold pipe, arranged on the lower template. The inner mold pipe includes a plurality of inner mold segments. The plurality of inner mold segments are assembled circumferentially to form the inner mold pipe. An assembly gap is formed between the inner mold segments, and at least one of the assembly gaps is filled with a plastic material;

[0009] An outer mold pipe, arranged on the lower template. The outer mold pipe includes a plurality of outer mold segments. The plurality of outer mold segments are assembled circumferentially to form the outer mold pipe. The outer mold pipe is sleeved outside the inner mold pipe, and the outer mold pipe and the inner mold pipe enclose a pouring space; and

[0010] The upper template is installed at the top of the inner mold tube and the outer mold tube. The upper template and the lower template are connected by a connecting structure to fix the inner mold tube and the outer mold tube. The upper template is provided with a grouting port communicating with the pouring space.

[0011] In one embodiment, the lower template and the upper template are provided with first grooves for inserting the inner mold tube, and first sealing members are arranged in the first grooves; and / or

[0012] The lower template and the upper template are provided with second grooves for inserting the outer mold tube, and second sealing members are arranged in the second grooves.

[0013] In one embodiment, the lower template and the upper template are both provided with silicone clamps. The silicone clamps are provided with first grooves for inserting the inner mold tube and second grooves for inserting the outer mold tube.

[0014] In one embodiment, the upper template, the lower template, the outer mold tube and the inner mold tube are made of transparent materials.

[0015] In one embodiment, the side walls of the inner mold segments on both sides of the plastic material are provided with engaging teeth.

[0016] In one embodiment, the connecting structure includes a screw and a nut. The upper template and the lower template are both provided with connecting holes. The screw passes through the connecting holes, and nuts are installed at both ends of the screw. A plurality of annular fasteners are sleeved outside the outer mold tube.

[0017] In one embodiment, adjusting pieces are pasted on the inner wall of the outer mold tube and / or the outer wall of the inner mold tube. The adjusting pieces are used to change the radial thickness of the pouring space.

[0018] In one embodiment, through holes are provided at the centers of the upper template and the lower template.

[0019] In one embodiment, a base is further included. The base is provided with a receiving cavity for receiving the lower template, and a receiving groove for receiving the protrusion of the connecting structure is further provided on the bottom wall of the receiving cavity.

[0020] A using method of the prefabricated tunnel lining model device as described in any one of the above, includes the following steps:

[0021] Apply a release agent on the inner side of the inner mold segments, assemble a plurality of the inner mold segments together circumferentially with waterproof tape, and then install the inner mold tube on the lower template;

[0022] Assemble a plurality of outer mold segments together circumferentially with waterproof tape, and then install the outer mold tube on the lower template;

[0023] Load the wire mesh into the pouring space and fix the position of the wire mesh with silk thread;

[0024] Install the upper mold at the top of the outer mold tube and the inner mold tube, and then fixedly connect the upper template and the lower template by using a connecting structure;

[0025] Seal the gaps of the outer mold tube with waterproof tape, seal one of the assembly gaps of the inner mold tube with a plastic material, and seal the other assembly gaps of the inner mold tube with waterproof tape;

[0026] Pour the prepared gypsum slurry into the pouring space along the grouting port, then use a vibrating table to vibrate and remove the air bubbles. After curing for a period of time, remove the mold, and it can be used for model tests.

[0027] The above-mentioned assembled tunnel lining model device and its use method have at least the following advantages:

[0028] 1. The inner mold tube, outer mold tube, lower template and upper template are made of transparent materials. The transparent material can directly observe the holes generated during the pouring process, which is convenient for controlling the pouring quality of the lining mold.

[0029] 2. By pasting an adjusting plate in the pouring space, a lining with a specified thickness can be generated, and the mold can be repeated and used under multiple working conditions.

[0030] 3. The wire mesh is fixed by pulling with silk thread, and the position of the wire mesh piece can be adjusted by using a slender rod through the reserved grouting port on the upper template to prevent the wire mesh from shifting during the pouring process, resulting in the phenomenon that the mesh piece is exposed on the lining surface.

[0031] 4. The gypsum slurry is prepared according to the ratio of water:gypsum = 1:1.4, and defoaming agent and retarder are added in a certain proportion, which not only meets the strength required for the tunnel model test lining, but also provides convenient conditions for pouring.

[0032] 5. Leave a section of gap in the inner mold tube. Before pouring, fill the gap with a plastic material. After pouring, curing and hardening, remove the plastic material in the gap, and achieve the effect of separating the masonry from the inner mold segments by pressure relief, which is convenient for detaching the inner mold tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific embodiments of the present invention, the drawings required for the specific embodiments will be briefly introduced below. In all the drawings, the components or parts are not necessarily drawn according to the actual ratio.

[0034] Figure 1 It is a schematic structural diagram of an assembled tunnel lining model device in an embodiment;

[0035] Figure 2 is Figure 1 a cross-sectional view of the prefabricated tunnel lining model device shown;

[0036] Figure 3 is Figure 1 a transverse cross-sectional top view of the prefabricated tunnel lining model device shown;

[0037] Figure 4 is Figure 1 a cross-sectional view of another section of the prefabricated tunnel lining model device shown;

[0038] Figure 5 is Figure 1 a structural schematic diagram of the lower template in;

[0039] Figure 6 a schematic diagram of installing a silicone fixture on the lower template in another implementation manner;

[0040] Figure 7 a schematic diagram of installing a silicone fixture on the upper template in another implementation manner;

[0041] Figure 8 is Figure 4 a schematic diagram of the engaging teeth of the segmented inner mold design in;

[0042] Figure 9 is Figure 8 a schematic diagram of the staggered engagement of the segmented inner mold in;

[0043] Figure 10 a schematic diagram of the prefabricated tunnel lining model device installed on the base;

[0044] Figure 11 is Figure 10 a structural schematic diagram of the base in;

[0045] Figure 12 a flowchart of the usage method of the prefabricated tunnel lining model device in one implementation manner.

[0046] Reference numerals:

[0047] 10 - lower template, 11 - first groove, 12 - second groove, 13 - silicone fixture, 14 - connection hole, 20 - inner mold tube, 202 - pouring space, 21 - segmented inner mold, 22 - engaging teeth, 23 - opening, 24 - handle, 30 - outer mold tube, 31 - segmented outer mold, 40 - upper template, 42 - grouting port, 50 - connection structure, 51 - screw, 52 - nut, 53 - gasket, 60 - base, 61 - accommodation cavity, 62 - accommodation groove. Detailed implementation manners

[0048] To make the above objects, features, and advantages of the present invention more apparent and understandable, the following will describe in detail the specific embodiments of the present invention with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0049] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0051] Please refer to Figure 1 and Figure 2 , a prefabricated tunnel lining model device in an embodiment, including a lower formwork 10, an inner formwork pipe 20, an outer formwork pipe 30, and an upper formwork 40.

[0052] Please also refer to Figures 3 to 4 , the inner formwork pipe 20 is arranged on the lower formwork 10. The inner formwork pipe 20 includes a plurality of inner formwork segments 21, and the plurality of inner formwork segments 21 are assembled circumferentially to form the inner formwork pipe 20. The outer formwork pipe 30 is arranged on the lower formwork 10. The outer formwork pipe 30 includes a plurality of outer formwork segments 31, and the plurality of outer formwork segments 31 are assembled circumferentially to form the outer formwork pipe 30. The outer formwork pipe 30 is sleeved outside the inner formwork pipe 20. The outer formwork pipe 30 and the inner formwork pipe 20 enclose a pouring space 202. The upper formwork 40 is installed at the top of the outer formwork pipe 30 of the inner formwork pipe 20. The upper formwork 40 and the lower formwork 10 are connected by a connecting structure 50 to fix the inner formwork pipe 20 and the outer formwork pipe 30. The upper formwork 40 is provided with a grouting port 42 communicating with the pouring space 202, and the gypsum slurry can be poured into the pouring space 202 through the grouting port 42.

[0053] Please also refer to Figure 5, in one embodiment, the lower template 10 and the upper template 40 are provided with a first groove 11 for inserting the inner mold tube 20. The first groove 11 is annular, and the first groove 11 can facilitate the installation and positioning of the inner mold tube 20. The lower template 10 and the upper template 40 are also provided with a second groove 12 for inserting the outer mold tube 30. The second groove 12 is annular, and the diameter of the second groove 12 is larger than that of the first groove 11. The second groove 12 can facilitate the installation and positioning of the outer mold tube 30.

[0054] On the basis of the above embodiments, further, a first seal is provided in the first groove 11. The first seal can seal the gap between the inner mold tube 20 and the upper template 40 and the lower template 10 to prevent slurry leakage during the pouring and curing processes of the mold. Specifically, the first seal can be an O-ring, and the first seal can also be a plastic film.

[0055] A second seal is provided in the second groove 12. The second seal can seal the gap between the outer mold tube 30 and the upper template 40 and the lower template 10 to prevent slurry leakage during the pouring and curing processes of the mold. Specifically, the second seal can be an O-ring, and the second seal can also be a plastic film.

[0056] Please refer to Figure 6 and Figure 7 , in another embodiment, the lower template 10 and the upper template 40 are both provided with a silica gel fixture 13. The silica gel fixture 13 is provided with a first groove 11 for inserting the inner mold tube 20 and a second groove 12 for inserting the outer mold tube 30. Among them, the silica gel fixture 13 can deform and play a sealing role to prevent slurry leakage during the pouring and curing processes of the mold. At the same time, the silica gel fixture 13 can fix the position of the wire mesh in the pouring space 202 to prevent the wire mesh from shifting during the pouring process, resulting in the phenomenon that the mesh is exposed on the lining surface.

[0057] Please refer to Figure 4 and Figure 8 , in one embodiment, an assembly gap is formed between the inner mold segments 21, and at least one assembly gap is filled with a plastic material. That is to say, at least one assembly gap of the inner mold segments 21 is filled with a plastic material, and the other assembly gaps of the inner mold segments 21 are sealed with waterproof tape. Since one of the assembly gaps of the inner mold segments 21 is filled with a plastic material, after the gypsum slurry is poured, cured and hardened, the plastic material in the assembly gap is removed, and the inner mold segments 21 can be separated from the masonry by pressure relief, which is convenient for detaching the inner mold segments 21.

[0058] In one embodiment, the plastic material can be plasticine, which can seal the assembly gap. At the same time, after the gypsum slurry cures and hardens, the plasticine can also be easily removed from the assembly gap to realize the pressure relief of the inner mold tube 20. Of course, the plastic material can also be paraffin wax or other plastic materials, as long as the assembly gap can be sealed and removed subsequently.

[0059] Please refer to Figure 9 , on the basis of the above embodiment, further, the opposite side walls of two adjacent inner mold segments 21 are provided with engaging teeth 22, and a plastic material is filled in the assembly gap between the engaging teeth 22. That is to say, the side walls of the inner mold segments 21 on both sides of the filled plastic material are designed with engaging teeth 22. After the plastic material in the assembly gap is removed, when demolding, the two inner mold segments 21 can be moved up and down in a staggered manner. After the inner mold segments 21 are moved up and down in a staggered manner, the two adjacent inner mold segments 21 are engaged with each other to realize the forced displacement of the inner mold segments 21 in the axial direction, so that the inner mold segments 21 are separated from the inner wall of the lining, which is convenient for demolding.

[0060] Please refer to again Figure 1 and Figure 5 , in one embodiment, the connecting structure 50 includes a screw 51 and a nut 52. The upper template 40 and the lower template 10 are both provided with connecting holes 14. The screw 51 is inserted into the connecting holes 14 of the upper template 40 and the lower template 10. After gaskets 53 are installed at both ends of the screw 51, nuts 52 are installed at both ends of the screw 51 to connect the upper template 40 and the lower template 10, and at the same time, the outer mold tube 30 and the inner mold tube 20 between the upper template 40 and the lower template 10 are clamped and fixed.

[0061] In one embodiment, the number of the connecting structures 50 is multiple groups, and multiple connecting structures 50 are evenly distributed at intervals along the circumferential direction of the lower template 10. Specifically, in this embodiment, the number of the connecting structures 50 is four. It can be understood that in other embodiments, the connecting structure 50 can also adopt other structures, as long as the upper template 40 and the lower template 10 can be connected and pulled against each other.

[0062] In one embodiment, an annular fastener (not shown in the figure) is sleeved outside the outer mold tube 30, and the number of the annular fasteners is multiple, and multiple annular fasteners are arranged at intervals along the axial direction of the outer mold tube 30. The annular fastener can be fixed outside the outer mold tube 30 to prevent the mold assembly from loosening, resulting in a problem of reduced pouring lining accuracy. Specifically, the annular fastener is a hose clamp. Of course, the fastener can also be a cable tie or other structures that can achieve circumferential fixation.

[0063] In one embodiment, the upper template 40, the lower template 10, the outer mold tube 30, and the inner mold tube 20 are made of a transparent material, and the mold has a transparent property, which is convenient for observation during the pouring process. In case of exposed wire mesh, masonry cracking or air holes, timely intervention and adjustment can be made. Specifically, the mold is made of acrylic material. The acrylic material is low in cost, high in precision, and far higher in cost performance than semi-flexible silicone molds, and far higher in precision than simple molds made of iron sheets or PVC foam boards.

[0064] It can be understood that in other embodiments, the mold can also be made of similar transparent acrylic (PMMA) materials such as polystyrene.

[0065] In one embodiment, adjusting pieces (not shown in the figure) are pasted on the inner wall of the outer mold tube 30 and / or the outer wall of the inner mold tube 20. The adjusting pieces are used to change the radial thickness of the pouring space 202, and a lining with a specified thickness can be generated. The mold can be repeated and used under multiple working conditions. At the same time, special-shaped adjusting pieces can be made to control the shape of the lining, and special-shaped linings and linings with cracks can be generated, improving the scope of use. Specifically, the adjusting piece can be a silicone membrane.

[0066] Please refer to Figure 4 , in one embodiment, through holes 23 are provided at the centers of both the upper template 40 and the lower template 10. During the installation process of the mold, the position of the inner mold segments 21 can be adjusted through the through holes 23, improving the installation speed and installation accuracy, thereby enhancing the lining quality. In one embodiment, handles 24 are provided on both the inside of the inner mold tube 20 and the outside of the outer mold tube 30. Through the handles 24, the inner mold tube 20 and the outer mold tube 30 can be installed and disassembled, improving the installation speed and demolding efficiency.

[0067] Please refer to Figure 10 and Figure 11 , in one embodiment, the prefabricated tunnel lining model device further includes a base 60. The base 60 is provided with a receiving cavity 61 for receiving the lower template 10, and the bottom wall of the receiving cavity 61 is further provided with a receiving groove 62 for receiving the protrusion of the connecting structure 50. Among them, the lower template 10 is installed in the base 60. The base 60 can ensure the level of the mold, and further ensure the vertical state of the inner mold tube 20 and the outer mold tube 30, ensuring the accuracy of the lining model. At the same time, the base 60 can fix the mold on the vibrating table to prevent the mold from shifting during the vibrating process.

[0068] Please refer to Figure 12 , the present invention also provides a use method of the above-mentioned prefabricated tunnel lining model device. The use method includes the following steps:

[0069] Step S110: Apply a release agent to the inner side of the inner mold segments 21, assemble multiple inner mold segments 21 together circumferentially using waterproof tape, and then install the inner mold tube 20 on the lower template 10.

[0070] Specifically, apply a release agent to the inner side of the inner mold segment 21. The release agent can be petroleum jelly or the like. Then, install the first seal in the first groove 11 of the lower template 10 and install the second seal in the second groove 12 of the lower template 10. Alternatively, paste the silicone fixture 13 on the lower template 10. Then, pass four screw rods 51 through the corresponding connection holes 14 of the lower template 10, and then fix the screw rods 51 on the lower template 10 with washers 53 and nuts 52.

[0071] Next, assemble multiple inner mold segments 21 together with waterproof tape to form the inner mold tube 20, and then insert the inner mold tube 20 into the first groove 11 of the lower template 10.

[0072] Step S120: Assemble multiple outer mold segments 31 together circumferentially with waterproof tape, and then install the outer mold tube 30 on the lower template 10.

[0073] Specifically, in the same way as the above-mentioned inner mold segment 21, assemble multiple outer mold segments 31 together with waterproof tape to form the outer mold tube 30, and then insert the outer mold tube 30 into the second groove 12 of the lower template 10. The space between the outer mold tube 30 and the inner mold tube 20 is the pouring space 202. Use three hose clamps to sleeve the outer mold tube 30 to prevent the mold assembly from loosening.

[0074] Step S130: Load the wire mesh into the pouring space 202 and fix the position of the wire mesh with silk thread.

[0075] Specifically, roll the rectangular wire mesh sheet into a cylinder and tie it with thin iron wire at the overlapping part. Then, load the wire mesh into the pouring space 202 and fix the position of the wire mesh with silk thread in a tensioning manner. Of course, the wire mesh can also be fixed on the iron rod to fix the position of the wire mesh, and the iron rod is pulled out after pouring is completed. Or, in another embodiment, when the wire mesh is loaded into the pouring space 202, insert the lower end of the wire mesh into the silicone fixture 13 to fix the position of the wire mesh.

[0076] Step S140: Install the upper mold on the tops of the outer mold tube 30 and the inner mold tube 20, and then use the connection structure 50 to fixedly connect the upper template 40 and the lower template 10.

[0077] Specifically, install the first seal in the first groove 11 of the upper template 40 and install the second seal in the second groove 12 of the upper template 40. Then, pass four screw rods 51 through the corresponding connection holes 14 of the upper template 40, insert the inner mold tube 20 into the first groove 11, insert the outer mold tube 30 into the second groove 12, and finally fix the upper template 40 with washers 53 and nuts 52.

[0078] Alternatively, paste the silicone fixture 13 onto the upper template 40, then pass four screw rods 51 through the corresponding connection holes 14 of the upper template 40, insert the inner mold tube 20 into the first groove 11, insert the outer mold tube 30 into the second groove 12, insert the upper end of the wire mesh into the silicone fixture 13, and insert the upper and lower ends of the wire mesh into the silicone fixture 13 to ensure that the iron wire is completely fixed. Finally, fix the upper template 40 with washers 53 and nuts 52.

[0079] Step S150: Seal the gaps of the outer mold tube 30 with waterproof tape, seal one of the assembly gaps of the inner mold tube 20 with a plastic material, and seal the other assembly gaps of the inner mold tube 20 with waterproof tape.

[0080] Specifically, seal all the gaps of the outer mold tube 30 with waterproof tape, seal one of the assembly gaps of the inner mold tube 20 with plasticine, and seal the other assembly gaps of the inner mold tube 20 with waterproof tape to prevent slurry leakage during the pouring and curing of the mold.

[0081] Step S160: Pour the prepared gypsum slurry into the pouring space 202 along the grouting port 42, then use a vibrating table to vibrate and remove the air bubbles. After curing for a period of time, remove the mold, and it can be used for model tests.

[0082] Specifically, the gypsum slurry is prepared with a ratio of water:gypsum = 1:1.4, and defoaming agent and retarder are added in a certain proportion, which not only meets the strength requirements of the tunnel model test lining but also provides convenient conditions for pouring. Adding a retarder can prevent the gypsum from solidifying in a short time and provide a time margin for pouring; adding a defoaming agent can reduce the air bubble cavities generated in the lining to a certain extent and improve the lining quality.

[0083] Then pour the gypsum slurry into the pouring space 202 along the grouting port 42. The mold has a transparent feature, which is convenient for observation during the pouring process. If there is an exposed wire mesh, masonry cracking or air holes, timely intervention and adjustment can be made. Moreover, it is light in weight and convenient for assembly and handling. During the pouring process, through the reserved grouting port 42 of the upper template 40, a slender rod can be used to adjust the position of the wire mesh sheet to prevent the wire mesh from shifting during the pouring process and causing the mesh to be exposed on the surface of the lining.

[0084] After pouring is completed, transfer the masonry model device to the vibrating table. The base 60 can fix the mold on the vibrating table to prevent the mold from shifting during vibration. Use the vibrating table to vibrate and remove the air bubbles. After curing for a period of time, remove the mold, pick out the plasticine in the assembly gap, and achieve the effect of separating the masonry from the inner mold segment 21 by depressurization to facilitate demolding. The finally formed tunnel lining can be used for model tests.

[0085] For the above-mentioned assembled tunnel lining model device and its usage method, the overall material of the mold, except for the fasteners, uses acrylic (PMMA), which has the characteristic of transparency. During the pouring process, it is convenient to observe. In case of exposed wire mesh, masonry cracking or air holes, timely intervention and adjustment can be carried out. Moreover, it is light in weight, facilitating assembly and handling. The screw 51 is used to fasten the mold up and down and even as a whole, and the hose clamp is fixed on the outside to prevent the loosening of the mold components, which may cause the problem of reduced pouring lining accuracy. A gap is left in the inner mold tube 20. Before pouring, materials such as plasticine are filled into the gap. After pouring, curing and hardening, the plasticine in the gap is removed to achieve the effect of separating the masonry from the inner segmented part through pressure relief, facilitating demoulding. Both the upper and lower templates 10 are designed with a sealing structure, and under the up and down fastening action of the screw 51, a sealing effect is achieved to prevent slurry leakage during the pouring and curing processes of the mold. The gypsum slurry not only meets the strength required for the tunnel model test lining but also provides convenient conditions for pouring. The wire mesh is fixed by pulling with silk threads, and the position of the wire mesh piece can be adjusted by using a slender rod through the reserved grouting port on the upper template 40 to prevent the displacement of the wire mesh during pouring, which may cause the mesh to be exposed on the surface of the lining. By pasting adjusting pieces inside the pouring space 202, a lining with a specified thickness can be generated, and the mold can be reused under multiple working conditions. There are circular holes 23 at the centers of the upper template 40 and the lower template 10. During the installation process of the mold, the position of the inner mold can be adjusted through the holes 23, improving the installation speed and accuracy, thereby enhancing the lining quality.

[0086] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and the description of the present invention.

Claims

1. An assembled tunnel lining model device, characterized in that Comprising: Lower template; Inner mold tube, provided on the lower template, the inner mold tube includes a plurality of inner mold segments, the plurality of inner mold segments are assembled circumferentially to form the inner mold tube, an assembly gap is formed between the inner mold segments, and at least one of the assembly gaps is filled with a plastic material; Outer mold tube, provided on the lower template, the outer mold tube includes a plurality of outer mold segments, the plurality of outer mold segments are assembled circumferentially to form the outer mold tube, the outer mold tube is sleeved outside the inner mold tube, and the outer mold tube and the inner mold tube enclose a casting space; And Upper template, installed at the top of the inner mold tube and the outer mold tube, the upper template and the lower template are connected by a connection structure to fix the inner mold tube and the outer mold tube, and the upper template is provided with a grouting port communicating with the casting space.

2. The assembled tunnel lining model device according to claim 1, characterized in that The lower template and the upper template are provided with a first groove for inserting the inner mold tube, and a first seal is provided in the first groove; and / or The lower template and the upper template are provided with a second groove for inserting the outer mold tube, and a second seal is provided in the second groove.

3. The prefabricated tunnel lining model device according to claim 1, characterized in that Both the lower template and the upper template are provided with silicone clamps, and the silicone clamps are provided with a first groove for inserting the inner mold tube and a second groove for inserting the outer mold tube.

4. The prefabricated tunnel lining model device according to claim 1, characterized in that, The upper template, the lower template, the outer mold tube and the inner mold tube are made of transparent materials.

5. The assembled tunnel lining model device according to claim 1, characterized in that, The side walls of the inner mold segments on both sides of the filled plastic material are provided with engaging teeth.

6. The prefabricated tunnel lining model device according to claim 1, characterized in that, The connection structure includes a screw and a nut, both the upper template and the lower template are provided with connection holes, the screw is inserted into the connection holes, nuts are installed at both ends of the screw, and a plurality of annular fasteners are sleeved outside the outer mold tube.

7. The assembled tunnel lining model device according to claim 1, characterized in that Adjusting pieces are pasted on the inner wall of the outer mold tube and / or the outer wall of the inner mold tube, and the adjusting pieces are used to change the radial thickness of the casting space.

8. The prefabricated tunnel lining model device according to claim 1, characterized in that, Both the upper template and the lower template are provided with through holes at the center.

9. The prefabricated tunnel lining model device according to claim 1, characterized in that, It further includes a base, the base is provided with a receiving cavity for receiving the lower template, and the bottom wall of the receiving cavity is further provided with a receiving groove for receiving the protrusion of the connection structure.

10. A method for using the assembled tunnel lining model device according to any one of claims 1-9, characterized in that, Including the following steps: Apply a release agent to the inner side of the inner mold segments, assemble the plurality of inner mold segments together circumferentially with waterproof tape, and then install the inner mold tube on the lower template; Assemble the plurality of outer mold segments together circumferentially with waterproof tape, and then install the outer mold tube on the lower template; Load the wire mesh into the casting space and fix the position of the wire mesh with silk thread; Install the upper mold at the top of the outer mold tube and the inner mold tube, and then fixedly connect the upper template and the lower template by a connection structure; Seal the gap of the outer mold tube with waterproof tape, seal one of the assembly gaps of the inner mold tube with a plastic material, and seal the other assembly gaps of the inner mold tube with waterproof tape; Pour the prepared gypsum slurry into the casting space along the grouting port, then use a vibrating table to vibrate and remove the bubbles, and demold after curing for a period of time, and it can be used for model tests.

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