Device and method for manufacturing tunnel lining model with crack character

Abstract

The invention relates to the technical field of tunnel lining manufacturing, in particular to a device and method for manufacturing a tunnel lining model with a crack character, and the device comprises a combined sliding rail located above an outer mold, the lower end of the combined sliding rail is slidably connected with a plurality of telescopic assemblies, and the lower ends of the telescopic assemblies are movably connected with ball socket cylinders through first ball heads; the ball socket cylinder is movably connected with a ball socket rod, the other end of the ball socket rod is movably connected with a crack mold, and a heating wire is arranged in the crack mold. The tunnel lining mold is formed by combining the outer mold and the inner mold, the multiple crack molds are arranged, and when the tunnel lining mold is used, only the inner mold combination blocks need to be disassembled, then the nearby crack molds are selected, and cracks can be formed in the designated position. And the movement range of the crack mold is very large, so that various requirements on quantitative crack manufacturing can be met. And a heating wire is arranged in the crack mold, and cracks formed in the tunnel lining are rapidly solidified through heating.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel lining manufacturing, and in particular to a device for manufacturing a tunnel lining model containing crack characteristics and a manufacturing method thereof. Background Art

[0002] In the process of making a tunnel lining model, in order to simulate the real tunnel environment, it is sometimes necessary to set cracks in the lining model. However, in the existing technology, the process of making a tunnel lining model with crack characteristics is relatively complicated.

[0003] Moreover, cracks are usually made when the tunnel lining is in the initial setting state, but the concrete is not stable in the initial setting state. Especially when cracks are made on the vertical surface of the tunnel lining, due to the effect of gravity, the concrete in the initial setting state is prone to flow collapse, causing the cracks to deform or even close.

[0004] Therefore, it is necessary to provide a novel device for making a tunnel lining model containing crack characteristics to solve the above problems.

[0005] In addition, the artificial cracks currently created are not real irregular cracks, but regular cracks. This approach has a large deviation from reality. Therefore, how to make it closer to reality and how to produce cracks of various shapes in reality are also problems we hope to solve. Summary of the invention

[0006] In view of this, the purpose of the present invention is to propose a device and method for making a tunnel lining model with crack characteristics, so as to solve the problem that the process of making a tunnel lining model with crack characteristics in the prior art is relatively complicated and the cracks are easy to deform or even close.

[0007] Based on the above purpose, the present invention provides a device for making a tunnel lining model with crack characteristics, comprising an outer mold and an inner mold composed of a plurality of inner mold assembly blocks, wherein the outer mold and the inner mold are combined into a tunnel lining mold, and the tunnel lining model further comprises:

[0008] A combined slide rail is located above the outer mold, wherein the lower end of the combined slide rail is slidably connected to a plurality of telescopic components, and the lower end of each telescopic component is fixedly connected to a first ball head;

[0009] A ball socket tube movably connected to the first ball head, the other end of the ball socket tube is movably connected to a ball socket rod, and the other end of the ball socket rod is movably connected to a crack mold for making cracks on the inner wall of the tunnel lining;

[0010] A heating component is arranged inside the crack mold for heating the crack mold.

[0011] Furthermore, a ball socket is provided at the connection between the ball socket tube and the first ball head, one end of the ball socket rod is located in the ball socket tube and is telescopically and slidably connected thereto, and the other end of the ball socket rod is also provided with a ball socket, the crack mold is fixedly connected to the connecting piece, and a second ball head is fixedly connected to the other side of the connecting piece, and the second ball head is movably connected in the ball socket of the ball socket rod.

[0012] Furthermore, the telescopic assembly includes a base tube, an intermediate tube and a telescopic rod, the base tube is slidably connected to the lower end of the combined slide rail, the upper end of the intermediate tube is located in the base tube and is slidably connected thereto, the upper end of the telescopic rod is located in the intermediate tube and is slidably connected thereto, and the first ball head is fixedly connected to the lower end of the telescopic rod.

[0013] Furthermore, the combined slide rail is fixedly connected to the track tripod, and the track tripod is detachably connected to the outer mold. The combined slide rail includes a plurality of slide rails with different curvatures, and a telescopic component is slidably connected under each slide rail. The inner mold is composed of six inner mold combination blocks with different curvatures, and adjacent inner mold combination blocks are fixedly connected by connecting plates. The inner mold has the same shape as the outer mold and is proportionally reduced.

[0014] Furthermore, the telescopic component is provided with an energy storage power supply for supplying power to the heating component, and the combined slide rail is provided with an electrical connector, which can be connected to an external power supply to supply power to the heating component.

[0015] Furthermore, a wire connected to a power supply is provided in the telescopic component, and the wire is connected to a power-carrying component between the first ball head and the ball socket tube through a flexible cable, and the power-carrying component is connected to a first conductive rod through a flexible cable, and the first conductive rod is connected to a power-carrying component between the second ball head and the ball socket rod, and the power-carrying component is connected to a second conductive rod through a flexible cable, and the second conductive rod is connected to a heating component.

[0016] Further, the power supply assembly between the first ball head and the ball socket tube includes a connection socket and a movable part, the connection socket is fixedly connected to the ball socket of the ball socket tube, the movable part passes through the ball wall of the first ball head and is slidably connected thereto, and a conductive block is slidably connected in the inner cavity of the movable part, the conductive block is slidably connected to the connection socket, and a third conductive rod is fixedly connected to the conductive block, the other end of the third conductive rod passes through the movable part and is connected to the flexible cable, and an inner spring is also provided in the movable part, the inner spring is located between the conductive block and the movable part, an outer spring is also connected to the outside of the movable part, the other end of the outer spring is connected to the partition, and the partition is fixedly connected to the first ball head;

[0017] The structure of the power supply assembly between the second ball head and the ball socket rod is the same as the structure of the power supply assembly between the first ball head and the ball socket cylinder.

[0018] Furthermore, the crack mold is a fixed part that will not deform, and the heating component is a heating wire, and the heating wire is fixedly installed inside the crack mold.

[0019] Furthermore, the crack mold is a deformable flexible sleeve, a plurality of metal sheets are attached to the outer surface of the flexible sleeve, and the flexible sleeve is filled with a filler that can be transformed between solid and liquid under temperature control. The heating component is a heating rod, which is located inside the flexible sleeve and fixedly connected to the connecting piece.

[0020] A method for manufacturing a tunnel lining model with crack characteristics, comprising the following steps:

[0021] Step 1: After assembling the inner mold, pour concrete between the outer mold and the inner mold. After the concrete has initially set, disassemble the inner mold assembly blocks at the corresponding positions according to the positions where the cracks are to be opened.

[0022] Step 2: Select the telescopic assembly at the corresponding position, lower it to the appropriate position, rotate the ball-and-socket cylinder to make the crack mold perpendicular to the inner wall of the tunnel lining, and then pull out the ball-and-socket rod to insert the crack mold into the initially set tunnel lining;

[0023] Step 3: Rotate the ball-and-socket cylinder so that the crack mold cuts a crack on the initially set tunnel lining, and start the heating wire to heat the crack mold so that the crack on the tunnel lining solidifies quickly, preventing the initially set concrete from collapsing and causing the crack to deform or even close;

[0024] Step 4: Use the telescopic assembly to lower the crack mold by one position, and repeat the above operation to make a second crack until all the cracks are made;

[0025] Step 5: After the cracked tunnel lining is completely solidified, first remove the combined slide rail and the telescopic assembly thereon, then remove the inner mold, and finally take out the cracked tunnel lining.

[0026] Beneficial effects of the present invention: 1. A tunnel lining mold is formed by combining an outer mold and an inner mold, wherein the inner mold is composed of a plurality of inner mold combination blocks. Compared with an integrally formed mold, it is not only easy to assemble, but also the tunnel lining can be easily taken out by simply disassembling the inner mold.

[0027] 2. Set up multiple crack molds, and cooperate with the inner mold composed of several inner mold assembly blocks. When you need to make a crack at any position on the inner wall of the tunnel lining, you only need to disassemble the inner mold assembly block at that position, and then select the crack mold nearby to make a crack at the specified position. There is no need to disassemble the entire inner mold, which is not only more convenient, but also can avoid deformation of the initial setting tunnel lining.

[0028] 3. The crack mold is installed at the lower end of the telescopic component through a telescopic ball and socket rod and a ball and socket tube, and the telescopic component can also be raised and lowered. Coupled with two sets of ball heads and ball sockets, the range of motion of the crack mold is very large, so it can meet various needs for quantitative production of cracks.

[0029] 4. A heating wire is arranged in the crack mold, and the heating wire can be powered by a built-in power supply or an external power supply, so that the cracks cut in the tunnel lining solidify quickly, preventing the initial setting concrete from collapsing and causing the cracks to deform or even close.

[0030] 5. The crack mold can be set to be deformable, such as a flexible sleeve, and the flexible sleeve is filled with a filler that can be changed between solid and liquid under temperature control, such as wax. By heating the wax and melting it, the crack mold can be deformed into the desired shape. When grooving, the wax is cooled to make the crack mold fixed, and then the desired crack can be opened. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 It is a schematic diagram of the overall structural principle of the present invention.

[0033] Figure 2 It is a schematic structural diagram of the crack mold part in the present invention.

[0034] Figure 3 It is a schematic diagram of the internal structure of the immutable form crack mold part of the present invention.

[0035] Figure 4 for Figure 3 Enlarged view of part A.

[0036] Figure 5 It is a schematic diagram of the structure of the variable form crack mold in the present invention.

[0037] Figure 6 It is a schematic diagram of the internal structure of the variable form crack mold part in the present invention.

[0038] The markings in the figure are:

[0039] 101. outer mold, 102. inner mold assembly block, 103. connecting piece, 104. track tripod, 105. combined slide rail, 106. electrical connector, 107. base tube, 108. intermediate tube, 109. telescopic rod, 110. first ball head, 111. ball socket tube, 112. ball socket rod, 113. connecting piece, 114. crack mold, 115. second ball head, 116. wire, 117. flexible cable, 118. connecting socket, 119. first conductive rod, 120. second conductive rod, 121. heating wire, 122. movable part, 123. partition, 124. outer spring, 125. third conductive rod, 126. conductive block, 127. inner spring, 128. flexible sleeve, 129. metal sheet, 130. filler, 131. heating rod. DETAILED DESCRIPTION

[0040] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0041] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0042] A first aspect of the present invention, as Figure 1 , Figure 2 As shown, the mold for making tunnel lining of the present invention is composed of an outer mold 101 and an inner mold. The mold is opened and the tunnel lining is taken out after the concrete solidifies by pouring concrete between the outer mold 101 and the inner mold. The outer mold 101 is integrally formed, and the inner mold is composed of a plurality of inner mold assembly blocks 102. Specifically, the inner mold is composed of six inner mold assembly blocks 102 with different curvatures. Adjacent inner mold assembly blocks 102 are fixedly connected by connecting pieces 103. It is necessary to ensure that the inner mold and the outer mold have the same shape and are proportionally reduced.

[0043] The tunnel lining mold is formed by combining an outer mold 101 and an inner mold, wherein the inner mold is composed of a plurality of inner mold assembly blocks 102. Compared with an integrally formed mold, it is not only easy to assemble, but also the tunnel lining can be easily taken out by simply disassembling the inner mold.

[0044] In addition, the tunnel lining produced by the present invention also includes crack characteristics, and the production of the cracks is achieved by using a crack mold 114 to cut open the concrete tunnel lining in the initial setting state.

[0045] Specifically, a track tripod 104 is detachably connected to the outer mold 101, and a combined slide rail 105 is fixedly connected to the track tripod 104. The combined slide rail 105 is located directly above the outer mold 101 and the inner mold. The combined slide rail 105 includes a plurality of slide rails with different curvatures, and a telescopic assembly is slidably connected below each slide rail. The telescopic assembly includes a base tube 107, an intermediate tube 108, and a telescopic rod 109, wherein the base tube 107 is slidably connected to the lower end of the combined slide rail 105, and the upper end of the intermediate tube 108 is located in the base tube 107 and slidably connected thereto, and the upper end of the telescopic rod 109 is located in the intermediate tube 108 and slidably connected thereto, and the lower end of the telescopic rod 109 is also fixedly connected to a first ball head 110.

[0046] The first ball head 110 is movably connected to a socket tube 111, the other end of the socket tube 111 is movably connected to a socket rod 112, the other end of the socket rod 112 is movably connected to a crack mold 114, a socket is provided at the connection between the socket tube 111 and the first ball head 110, one end of the socket rod 112 is located in the socket tube 111 and is telescopically and slidably connected thereto, and the other end of the socket rod 112 is also provided with a socket, and the crack mold 114 is fixedly connected to the connecting member 113, the other side of the connecting member 113 is fixedly connected to a second ball head 115, and this second ball head 115 is movably connected in the socket of the socket rod 112.

[0047] By setting a plurality of crack molds 114 and cooperating with an inner mold composed of several inner mold assembly blocks 102, when it is necessary to cut a crack at any position of the inner wall of the tunnel lining, it is only necessary to disassemble the inner mold assembly block 102 at the position, and then select the nearby crack mold 114 to cut a crack at the designated position. There is no need to remove the entire inner mold, which is not only more convenient, but also can avoid deformation of the initial setting tunnel lining. The crack mold 114 is installed at the lower end of the telescopic assembly through a telescopic ball and socket rod 112 and a ball and socket tube 111, and the telescopic assembly can also be raised and lowered. In addition, with two sets of ball heads and ball sockets, the range of motion of the crack mold 114 is very large, so it can meet various needs for quantitative production of cracks.

[0048] Another aspect of the present invention, as Figure 3 and Figure 4As shown, in order to prevent the concrete in the initial setting state from flowing and collapsing easily due to gravity when making cracks on the vertical surface of the tunnel lining, causing the cracks to deform or even close. A heating wire 121 is provided in the crack mold 114 for heating the crack mold 114. In this way, when the crack mold 114 cuts a crack on the initial setting tunnel lining, the heating wire 121 heats the crack mold 114, and the high temperature causes the crack on the tunnel lining to solidify quickly, preventing the initial setting concrete from collapsing and causing the cracks to deform or even close.

[0049] There are two ways to supply power to the heating wire 121. One is to provide an energy storage power supply in the telescopic assembly to supply power to the heating wire 121. Another way is to provide an electric connector 106 on the combined slide 105, and connect the electric connector 106 to an external power supply to supply power to the heating wire 121. Among them, when the electric connector 106 on the combined slide 105 is used for power supply, the electric connector 106 is electrically connected to the groove at the bottom of the combined slide 105 connected to the base tube 107, and the upper end of the wire 116 in the telescopic assembly extends into the groove, and is always in contact with the groove and slidably connected. If an energy storage power supply is provided in the telescopic assembly, the upper end of the wire 116 only needs to be connected to the energy storage power supply.

[0050] The lower end of the wire 116 is located in the first ball head 110, and the lower end of the wire 116 is connected to the power-carrying component between the first ball head 110 and the ball socket tube 111 through the flexible cable 117, and the power-carrying component is further connected to the first conductive rod 119 through the flexible cable 117, and the first conductive rod 119 is connected to the power-carrying component between the second ball head 115 and the ball socket rod 112, and the power-carrying component is further connected to the second conductive rod 120 through the flexible cable 117, and the second conductive rod 120 is connected to the heating wire 121.

[0051] The power supply assembly between the first ball head 110 and the ball socket tube 111 includes a connection socket 118 and a movable member 122, wherein the connection socket 118 is fixedly connected to the ball socket of the ball socket tube 111, and the movable member 122 passes through the ball wall of the first ball head 110 and is slidably connected thereto, and a conductive block 126 is slidably connected in the inner cavity of the movable member 122, and the conductive block 126 is slidably connected to the connection socket 118, and a third conductive rod 125 is fixedly connected to the conductive block 126, and the other end of the third conductive rod 125 passes through the movable member 122 and is connected to the flexible cable 117, and an inner spring 127 is also provided in the movable member 122, and the inner spring 127 is located between the conductive block 126 and the movable member 122, and an outer spring 124 is also connected to the outside of the movable member 122, and the other end of the outer spring 124 is connected to the partition 123, and the partition 123 is fixedly connected to the first ball head 110;

[0052] In addition, the structure of the power supply assembly between the second ball head 115 and the ball socket rod 112 is the same as that between the first ball head 110 and the ball socket tube 111. The outer spring 124 is mainly used to keep the movable part 122 always against the connection socket 118, while the inner spring 127 is used to keep the conductive block 126 in the movable part 122 always in contact with the connection socket 118 to ensure stable power supply.

[0053] Preferably, the base tube 107, the intermediate tube 108, the telescopic rod 109, the first ball head 110, the ball socket tube 111, the ball socket rod 112, the connector 113, the crack mold 114 and the second ball head 115 are all made of insulating materials to avoid leakage, short circuit and the like, and the above-mentioned conductive connecting components are all located in these insulating products to prevent workers from accidentally getting electric shock.

[0054] In particular, the device is equipped with necessary sensors, for example, the sensors can be installed on the track tripod 104 or the combined slide rail 105. Through these sensors and in conjunction with processing chips, the formation process of the cracks and the physical response of the model are recorded, and then the data is analyzed through software to provide more scientific basis for tunnel design.

[0055] The entire device and the tunnel lining mold are made in a special production workshop. Therefore, during the production process, different environmental conditions such as temperature and humidity are simulated in the production workshop to test the performance of the cracks in different environments. In particular, the crack mold 114 is tested in two operating modes, heating and non-heating, to test the performance of the cracks and the difference in the final state, and the data is recorded for reference in subsequent process and equipment improvements.

[0056] In addition, the crack mold 114 can also be configured as a deformable flexible sleeve 128, a plurality of metal sheets 129 are attached to the outer surface of the flexible sleeve 128, and the flexible sleeve 128 is filled with a filler 130 that can be controlled by temperature to change between solid and liquid. The heating component is a heating rod 131, which is located inside the flexible sleeve 128 and fixedly connected to the connector 113.

[0057] Specific operation method:

[0058] First, after the inner mold is assembled, concrete is poured between the outer mold 101 and the inner mold. After the concrete is initially set, the inner mold assembly block 102 at the corresponding position is disassembled according to the position where the crack is to be opened;

[0059] Then, the telescopic assembly at the corresponding position is selected and lowered to a suitable position, and the ball-and-socket cylinder 111 is rotated to make the crack mold 114 perpendicular to the inner wall of the tunnel lining, and then the ball-and-socket rod 112 is pulled out to insert the crack mold 114 into the initially set tunnel lining;

[0060] Then the ball-and-socket cylinder 111 is rotated so that the crack mold 114 cuts a crack on the initially set tunnel lining, and at the same time the heating wire 121 is started to heat the crack mold 114 so that the crack on the tunnel lining solidifies quickly, preventing the initially set concrete from collapsing and causing the crack to deform or even close;

[0061] Then, the crack mold 114 is lowered by one position through the telescopic assembly, and the above operation is repeated to make a second crack, until all the cracks are made;

[0062] Finally, after the cracked tunnel lining is completely solidified, the combined slide rail 105 and the telescopic assembly thereon are first removed, and then the inner mold is removed, and finally the cracked tunnel lining is taken out.

[0063] In summary, the present invention combines an outer mold 101 and an inner mold into a tunnel lining mold, wherein the inner mold is composed of a plurality of inner mold assembly blocks 102, and a plurality of crack molds 114 are provided. When a crack needs to be cut at any position of the inner side wall of the tunnel lining, it is only necessary to disassemble the inner mold assembly block 102 at the position, and then select the nearby crack mold 114, and the crack can be cut at the designated position. There is no need to remove the entire inner mold, which is not only more convenient, but also can avoid deformation of the initial setting tunnel lining. The crack mold 114 is installed at the lower end of the telescopic assembly through a telescopic ball and socket rod 112 and a ball and socket cylinder 111, and the telescopic assembly can also be lifted up and down, plus two sets of ball heads and ball sockets, so that the range of movement of the crack mold 114 is very large, so it can meet various needs for quantitative production of cracks. A heating wire 121 is provided in the crack mold 114, and the heating wire 121 can be powered by a built-in power supply or an external power supply. This allows cracks in the tunnel lining to solidify quickly, preventing the initial setting concrete from collapsing and causing the cracks to deform or even close.

[0064] It should be understood by those skilled in the art that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention, including the claims, is limited to these examples; within the context of the present invention, the technical features in the above embodiments or in different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0065] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A device for manufacturing a tunnel lining model with crack characteristics, comprising an outer mold (101) and an inner mold composed of a plurality of inner mold assembly blocks (102), wherein the outer mold (101) and the inner mold are combined into a tunnel lining mold, and the tunnel lining model further comprises: A combined slide rail (105) is located above the outer mold (101), wherein the lower end of the combined slide rail (105) is slidably connected to a plurality of telescopic components, and the lower end of each telescopic component is fixedly connected to a first ball head (110); A ball socket tube (111) movably connected to the first ball head (110), the other end of the ball socket tube (111) being movably connected to a ball socket rod (112), and the other end of the ball socket rod (112) being movably connected to a crack mold (114) for making cracks on the inner wall of the tunnel lining; A heating component is provided inside the crack mold (114) for heating the crack mold (114).

2. The device for making a tunnel lining model with crack characteristics according to claim 1, characterized in that: A ball socket is provided at the connection between the ball socket tube (111) and the first ball head (110); one end of the ball socket rod (112) is located in the ball socket tube (111) and is telescopically and slidably connected thereto; and the other end of the ball socket rod (112) is also provided with a ball socket; the crack mold (114) is fixedly connected to the connecting member (113); the other side of the connecting member (113) is fixedly connected to a second ball head (115); and the second ball head (115) is movably connected to the ball socket of the ball socket rod (112).

3. The device for making a tunnel lining model with crack characteristics according to claim 1, characterized in that: The telescopic assembly comprises a base tube (107), an intermediate tube (108) and a telescopic rod (109); the base tube (107) is slidably connected to the lower end of the combined slide rail (105); the upper end of the intermediate tube (108) is located in the base tube (107) and is slidably connected thereto; the upper end of the telescopic rod (109) is located in the intermediate tube (108) and is slidably connected thereto; and the first ball head (110) is fixedly connected to the lower end of the telescopic rod (109).

4. The device for making a tunnel lining model with crack characteristics according to claim 1, characterized in that: The combined slide rail (105) is fixedly connected to the track tripod (104), and the track tripod (104) is detachably connected to the outer mold (101). The combined slide rail (105) includes a plurality of slide rails with different curvatures, and a telescopic component is slidably connected under each slide rail. The inner mold is composed of six inner mold combination blocks (102) with different curvatures, and adjacent inner mold combination blocks (102) are fixedly connected by connecting pieces (103). The inner mold has the same shape as the outer mold and is proportionally reduced.

5. The device for making a tunnel lining model with crack characteristics according to claim 2, characterized in that: The telescopic component is provided with an energy storage power supply for supplying power to the heating component. The combined slide rail (105) is provided with an electrical connector (106), and the electrical connector (106) can be connected to an external power supply to supply power to the heating component.

6. The device for making a tunnel lining model with crack characteristics according to claim 5, characterized in that: The telescopic assembly is provided with a wire (116) connected to a power source. The wire (116) is connected to a power supply assembly between the first ball head (110) and the ball socket tube (111) through a flexible cable (117). The power supply assembly is connected to a first conductive rod (119) through the flexible cable (117). The first conductive rod (119) is connected to a power supply assembly between the second ball head (115) and the ball socket rod (112). The power supply assembly is connected to a second conductive rod (120) through the flexible cable (117). The second conductive rod (120) is connected to a heating assembly.

7. The device for making a tunnel lining model with crack characteristics according to claim 6, characterized in that: The electrical component between the first ball head (110) and the ball socket tube (111) comprises a connection socket (118) and a movable member (122), wherein the connection socket (118) is fixedly connected to the ball socket of the ball socket tube (111), the movable member (122) passes through the ball wall of the first ball head (110) and is slidably connected thereto, and a conductive block (126) is slidably connected in the inner cavity of the movable member (122), the conductive block (126) is slidably connected to the connection socket (118), and a third conductive block (126) is fixedly connected to the conductive block (126). An electric pole (125), the other end of the third conductive pole (125) passes through a movable part (122) and is connected to a flexible cable (117), and an inner spring (127) is provided inside the movable part (122), and the inner spring (127) is located between the conductive block (126) and the movable part (122), and an outer spring (124) is connected to the outside of the movable part (122), and the other end of the outer spring (124) is connected to a partition (123), and the partition (123) is fixedly connected inside the first ball head (110); The structure of the power supply assembly between the second ball head (115) and the ball socket rod (112) is the same as the structure of the power supply assembly between the first ball head (110) and the ball socket tube (111).

8. The device for making a tunnel lining model with crack characteristics according to claim 7, characterized in that: The crack mold (114) is a fixed part that will not deform, and the heating component is a heating wire (121), and the heating wire (121) is fixedly installed inside the crack mold (114).

9. The device for making a tunnel lining model with crack characteristics according to claim 7, characterized in that: The crack mold (114) is a deformable flexible sleeve (128), a plurality of metal sheets (129) are attached to the outer surface of the flexible sleeve (128), and the flexible sleeve (128) is filled with a filler (130) that can be changed between solid and liquid under temperature control. The heating component is a heating rod (131), and the heating rod (131) is located inside the flexible sleeve (128), and the heating rod (131) is fixedly connected to the connecting piece (113).

10. The method for making a tunnel lining model with crack characteristics according to claim 8, characterized in that: The steps include: Step 1: After the inner mold is assembled, concrete is poured between the outer mold (101) and the inner mold, and after the concrete is initially set, the inner mold assembly block (102) at the corresponding position is disassembled according to the position where the crack is to be opened; Step 2: Select the telescopic assembly at the corresponding position, lower it to a suitable position, rotate the ball socket cylinder (111) to make the crack mold (114) perpendicular to the inner wall of the tunnel lining, and then pull out the ball socket rod (112) to insert the crack mold (114) into the initially set tunnel lining; Step 3, rotating the ball-and-socket cylinder (111) so that the crack mold (114) cuts a crack on the initially set tunnel lining, and simultaneously starting the heating wire (121) to heat the crack mold (114) so ​​that the crack on the tunnel lining solidifies quickly, thereby preventing the initially set concrete from collapsing and causing the crack to deform or even close; Step 4, lowering the crack mold (114) by one position through the telescopic assembly, repeating the above operation to make a second crack, until all the cracks are made; Step 5, after the cracked tunnel lining is completely solidified, first remove the combined slide rail (105) and the telescopic assembly thereon, then remove the inner mold, and finally take out the cracked tunnel lining.

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