Small-diameter shield tunnel lining model manufacturing mold and method

Abstract

The invention discloses a small-diameter shield tunnel lining model manufacturing mold and method. The mold comprises an inner cylinder, an outer cylinder, a base, meshes, positioning blocks, bolt mounting position pre-embedded assemblies and micro bolts. The inner cylinder is arranged in the outer cylinder, and the lower end of the inner cylinder and the lower end of the outer cylinder are detachably fixed on the base; the bolt mounting position pre-embedded assembly is used for being arranged on the inner cylinder so as to provide a bolt mounting position between every two adjacent segment models; the mesh is annularly arranged in the middle between the inner cylinder and the outer cylinder; the positioning block is arranged between the inner cylinder and the outer cylinder so as to control the position of the outer cylinder relative to the inner cylinder and fix the mesh; the miniature bolts are used for being connected to the bolt installation positions between every two adjacent segment models. The small-size shield segment tunnel lining model can be accurately manufactured, and bolt connection of the small-size shield segment tunnel lining model can be completely simulated.

Description

Technical Field

[0001] The invention relates to the technical field of geotechnical indoor model test equipment, and in particular to a mold and method for manufacturing a small-diameter shield tunnel lining model. Background Art

[0002] Shield tunnel technology has made significant progress worldwide and has become an important means of underground space development. At present, shield tunnel technology is facing the challenges of large diameter, long distance and complex geological conditions, while pursuing higher construction efficiency and safety. Shield machine equipment is constantly innovating and equipped with advanced navigation and monitoring systems, which can achieve precise excavation and real-time control of geological conditions. In addition, the development of digital and intelligent technology has made shield tunnel construction more efficient and environmentally friendly. Countries have widely applied shield technology in complex environments such as the seabed and urban underground, which has promoted the development and utilization of underground space resources and injected new vitality into global infrastructure construction. With the continuous advancement of technology, shield tunnel construction will continue to play an important role in solving traffic congestion, optimizing urban space layout, and promoting regional development.

[0003] In geotechnical laboratory tests, the simulation methods of shield tunnels mainly include numerical simulation and physical model tests.

[0004] Numerical simulation mainly uses software such as ABAQUS and FLAC3D to simulate the shield tunnel excavation process by means of tracking unit method (Elcopy), life and death unit method, etc. As shown in the ABAQUS introductory teaching video tutorial, numerical simulation can simulate shield tunnel excavation, excavation under fluid-solid coupling conditions, and parametric modeling in detail, which is suitable for studying the impact of shield tunnels on the surrounding environment, such as ground settlement, underground pipelines and building responses, etc.

[0005] Physical model tests are usually conducted on large-scale comprehensive simulation test platforms. By constructing a large-scale test model (such as 6m×6m×8m), it simulates shield construction in sandy gravel formations, the impact of groundwater level changes, and the mechanical response of high-stress gradient tunnel structures. This method can intuitively reflect the mechanical behavior and environmental impact during shield tunnel construction. It is characterized by large model size, comprehensive monitoring points, and cutting-edge design levels, and can achieve physical simulation of the entire life cycle.

[0006] Numerical simulation is low-cost and widely applicable, but requires accurate parameter input and reasonable model assumptions. Physical model tests can directly reflect the actual situation, but due to limitations in size, material, process, etc., the test results are often greatly affected.

[0007] Since the shield tunnel segments are prefabricated in sections and pieces and bolted together during construction, it is difficult to achieve similar assembly functions and effects in small-scale model tests. Therefore, mechanical equivalent models are mainly used for simulation. For example, when studying the overall bending of the tunnel, PCV pipes, thin-walled metal pipes, etc. are often used as substitutes. The mechanical simulation effect is difficult to guarantee.

[0008] At present, the segment-type model making method has high requirements on the thickness of the segment and is suitable for large-scale model making. This will also cause the size of the model box and the vibration test bench to increase exponentially, and even make it impossible to complete certain tests (such as vibration table tests). In addition, there is a model that only grooves the segment connection parts of the cylindrical test model, which is still not a segment-type model making, and this model does not simulate the spiral connection.

[0009] In summary, at present, there are no model making tools and methods that can fully simulate the segment assembly and bolt connection and are suitable for small scale when making test models for segmental lining of shield tunnels. Summary of the invention

[0010] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present invention is to provide a small-diameter shield tunnel lining model manufacturing mold and method, which can accurately manufacture a small-size shield segment tunnel lining model and can fully simulate the bolt connection of the small-size shield segment tunnel lining model.

[0011] A small-diameter shield tunnel lining model manufacturing mold according to an embodiment of the present invention comprises:

[0012] A mold main body component, the mold main body component includes an inner cylinder, an outer cylinder, a base, a mesh, a positioning block and a bolt installation position embedded component; the inner cylinder is arranged in the outer cylinder, and the lower end of the inner cylinder and the lower end of the outer cylinder are detachably fixed to the base; the bolt installation position embedded component is used to be arranged on the inner cylinder to provide bolt installation positions between two adjacent segment models; the mesh is used to be arranged in a ring in the middle between the inner cylinder and the outer cylinder; the positioning block is used to be arranged between the inner cylinder and the outer cylinder to control the position of the outer cylinder relative to the inner cylinder and fix the mesh;

[0013] Micro bolts are used to connect the bolt installation positions between two adjacent segment models.

[0014] According to the small-diameter shield tunnel lining model making mold of the embodiment of the present invention, the process of making the small-diameter shield tunnel lining model is as follows: first, the mold main body component is assembled using the inner tube, outer tube, base, mesh, positioning block and bolt installation position embedded components, and the inner tube, outer tube and base form an annular mold cavity with a closed lower end and an open upper end; then, filling material such as cement mortar or fine stone concrete is poured from the upper end of the mold main body component into the annular mold cavity between the inner tube and the outer tube to obtain an integral tubular model, and then the required split-type segment model is obtained by cutting the tubular model; finally, micro bolts are passed through the bolt installation positions between two adjacent segment models to fix the two adjacent segment models together to obtain a small-diameter shield tunnel lining model for subsequent simulation tests.

[0015] The small-diameter shield tunnel lining model manufacturing mold of the embodiment of the present invention has the following advantages: the combination of the inner tube, the outer tube, the base and the pad is conducive to the production of a thin-walled small-diameter shield tunnel lining model; the bolt installation position in the thin-walled small-diameter shield tunnel lining model can be produced by the method of pre-embedded components of the bolt installation position; the micro-bolt connection method not only ensures the complete simulation of the actual shield tunnel method but also solves the problem of miniaturization of the connection mechanism between the segment models; the mold main body component is used to first make an integral tubular model, and then the tubular model is cut into several required segment models by a cutting tool. The segment model obtained by cutting can simulate the actual shield tunnel lining segment, which can ensure the miniaturization and accurate simulation of the shield tunnel lining model. In short, the small-diameter shield tunnel lining model manufacturing mold of the embodiment of the present invention can accurately produce a small-sized shield segment tunnel lining model, and can completely simulate the bolt connection of the small-sized shield segment tunnel lining model, which is conducive to improving the reliability of the test effect.

[0016] In some embodiments, the base is provided with an inner annular groove for embedding the lower end of the inner cylinder and an outer annular groove for embedding the lower end of the outer cylinder.

[0017] In some embodiments, a plurality of supporting parts are disposed on the base, and the plurality of supporting parts are arranged at intervals on the outer edge of the outer ring groove to support the outer surface of the outer cylinder.

[0018] In some embodiments, the mesh is a steel wire mesh or a composite material mesh.

[0019] In some embodiments, the bolt installation position embedded component includes an embedded tube and pads arranged at both ends of the embedded tube, the pads are used to be fixed on the outer surface of the inner tube, and the two ends of the embedded tube are used to be inserted into the corresponding pads.

[0020] In some embodiments, the embedded pipe is a plastic pipe, and the cushion block is a foam cushion block.

[0021] In some embodiments, the outer cylinder is a transparent outer cylinder.

[0022] The invention also proposes a method for manufacturing a small-diameter shield tunnel lining model.

[0023] According to the method for making a small-diameter shield tunnel lining model according to an embodiment of the present invention, a small-diameter shield tunnel lining model is made using a small-diameter shield tunnel lining model making mold according to an embodiment of the present invention, and the method comprises the following steps:

[0024] S1: Assemble the mold main body components;

[0025] S2: pouring a filling material from the upper end of the mold main body assembly into the annular mold cavity between the inner tube and the outer tube to obtain an integral tubular model, and then cutting the tubular model to obtain the required split segment model;

[0026] S3: Passing the micro bolts through the bolt installation positions between the two adjacent segment models to fix the two adjacent segment models together, so as to obtain a small-diameter shield tunnel lining model.

[0027] Since the small-diameter shield tunnel lining model manufacturing method of the embodiment of the present invention adopts the small-diameter shield tunnel lining model manufacturing mold of the embodiment of the present invention to manufacture the lining model, the small-diameter shield tunnel lining model manufacturing method of the embodiment of the present invention has the same technical effect as the small-diameter shield tunnel lining model manufacturing mold of the embodiment of the present invention, and will not be repeated here.

[0028] In some embodiments, step S1 specifically includes the following sub-steps:

[0029] S11: drawing lines on the outer surface of the inner tube to divide the required contour of the segment model, and fixing the bolt installation position embedded component on the outer surface of the inner tube at the position where the micro bolts need to be arranged according to the lines drawn on the outer surface of the inner tube;

[0030] S12: a mesh is arranged on the outer side of the inner cylinder, a plurality of the positioning blocks are fixed on the inner cylinder at intervals, and the mesh is fixed at the radial middle of the positioning blocks;

[0031] S13: Fixing the lower end of the inner cylinder after completing step S12 on the base, sleeve the outer cylinder outside the inner cylinder and fix the lower end of the outer cylinder on the base to obtain the mold main body assembly.

[0032] In some embodiments, step S2 specifically includes the following sub-steps:

[0033] S21: pouring filling material from the upper end of the mold body assembly into the annular mold cavity between the inner cylinder and the outer cylinder and continuously vibrating until the entire annular mold cavity is filled to obtain the integral tubular model;

[0034] S22: curing the tubular model in a curing room to make the tubular model reach a standard strength;

[0035] S23: after step S22, the base is removed, and a cutting line is drawn at a position of the outer cylinder corresponding to the inner cylinder;

[0036] S24: cutting out the segment models according to the cutting lines, and numbering the segment models in sequence;

[0037] S25: Processing the cut embedded components of the bolt installation positions on each of the segment models to provide bolt installation positions for the micro bolts.

[0038] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0040] Figure 1 A top view of a mold body assembly for making a mold for a small-diameter shield tunnel lining model according to an embodiment of the present invention;

[0041] Figure 2 A side view of a mold body assembly for making a mold for a small-diameter shield tunnel lining model according to an embodiment of the present invention;

[0042] Figure 3 A schematic diagram of a partial structure of a tubular model of a mold main body component of a small-diameter shield tunnel lining model manufacturing mold according to an embodiment of the present invention, in which the outer cylinder is removed and the exposed tubular model is divided into a segment model and a tubular model by a cutting line;

[0043] Figure 4 A schematic cross-sectional view of a mold body assembly for making a mold for a small-diameter shield tunnel lining model according to an embodiment of the present invention.

[0044] Reference numerals:

[0045] Mold main body component 1; inner tube 101; outer tube 102; base 103; support part 1031; mesh 104; bolt installation position embedded component 105; embedded pipe 1051; cushion block 1052; tubular model 2; pipe segment model 3; cutting line M. DETAILED DESCRIPTION

[0046] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0047] The invention provides a mold for manufacturing a small-diameter shield tunnel lining model.

[0048] Combine the following Figures 1 to 4 The following describes a small diameter shield tunnel lining model manufacturing mold according to an embodiment of the present invention.

[0049] like Figures 1 to 4 As shown, the small-diameter shield tunnel lining model manufacturing mold according to an embodiment of the present invention includes a mold main body component 1 and micro bolts (not shown in the figure).

[0050] Specifically, the mold main body component 1 includes an inner cylinder 101, an outer cylinder 102, a base 103, a mesh 104, a positioning block (not shown in the figure) and a bolt installation position embedded component 105. The inner cylinder 101, the outer cylinder 102, the base 103, the mesh 104, the positioning block and the bolt installation position embedded component 105 are independent components. The inner cylinder 101 is arranged in the outer cylinder 102, and the lower end of the inner cylinder 101 and the lower end of the outer cylinder 102 are detachably fixed on the base 103. In this way, on the one hand, the inner cylinder 101, the outer cylinder 102 and the base 103 can enclose an annular mold cavity with a closed lower end and an open upper end, so that an integral tubular model 2 can be first made by pouring filling materials, and then the required segment model 3 can be obtained by cutting the tubular model 2. On the other hand, through the cooperation of the inner cylinder 101 and the outer cylinder 102 and the pad 1052, the size of the shield tunnel lining model can be miniaturized, such as a small diameter and a thin pipe wall. The bolt installation position embedded component 105 is used to be arranged on the inner tube 101 to provide bolt installation positions between two adjacent segment models 3, so as to facilitate the connection and fixation between the segment models 3 produced later. The mesh 104 is used to be arranged in the middle between the inner tube 101 and the outer tube 102, which is conducive to increasing the strength of the segment model 3, so as to simulate the embedded steel mesh in the actual shield tunnel lining segment; the positioning block is used to be arranged between the inner tube 101 and the outer tube 102 to control the position of the outer tube 102 relative to the inner tube 101, thereby controlling the wall thickness of the tubular model 2, that is, the wall thickness of the segment model 3. The positioning block is also used to fix the mesh 104, which is conducive to the mesh 104 being in the middle position between the inner tube 101 and the outer tube 102, that is, to ensure that the mesh 104 is in the middle position in the thickness direction of the segment.

[0051] The micro bolts are used to connect the bolt installation positions between two adjacent segment models 3 to simulate the actual bolt connection of the shield tunnel lining.

[0052] According to the small-diameter shield tunnel lining model making mold of the embodiment of the present invention, the process of making the small-diameter shield tunnel lining model is as follows: first, the mold main body component 1 is assembled using the inner cylinder 101, the outer cylinder 102, the base 103, the mesh 104, the positioning block and the bolt installation position embedded component 105, and the inner cylinder 101, the outer cylinder 102 and the base 103 form an annular mold cavity with a closed lower end and an open upper end; then, a filling material such as cement mortar or fine stone concrete is poured from the upper end of the mold main body component 1 into the annular mold cavity between the inner cylinder 101 and the outer cylinder 102 to obtain an integral tubular model 2, and then the required split-type segment model 3 is obtained by cutting the tubular model 2; finally, micro bolts are passed through the bolt installation positions between two adjacent segment models 3 to fix the two adjacent segment models 3 together to obtain a small-diameter shield tunnel lining model for subsequent simulation tests.

[0053] The small-diameter shield tunnel lining model manufacturing mold of the embodiment of the present invention has the following advantages: the inner tube 101, the outer tube 102, the base 103 and the pad 1052 are used in combination to facilitate the production of a thin-walled small-diameter shield tunnel lining model; the bolt installation position in the thin-walled small-diameter shield tunnel lining model can be produced by using the bolt installation position embedded component 105; the micro-bolt connection method not only ensures the complete simulation of the actual shield tunnel method but also solves the problem of miniaturization of the connection mechanism between the segment models; the mold main body component 1 is used to first make an integral tubular model 2, and then the tubular model 2 is cut into a number of required segment models 3 by a cutting tool, and the segment model 3 obtained by cutting can simulate the actual shield tunnel lining segment, which can ensure the miniaturization and accurate simulation of the shield tunnel lining model. In short, the small-diameter shield tunnel lining model manufacturing mold of the embodiment of the present invention can accurately produce a small-size shield segment tunnel lining model, and can completely simulate the bolt connection of the small-size shield segment tunnel lining model, which is conducive to improving the reliability of the test effect.

[0054] In some embodiments, the base 103 is provided with an inner ring groove for embedding the lower end of the inner cylinder 101 and an outer ring groove for embedding the lower end of the outer cylinder 102. Thus, on the one hand, the inner cylinder 101 and the outer cylinder 102 can be fixed, and on the other hand, the wall thickness of the small-diameter shield tunnel lining model can be accurately controlled.

[0055] In some embodiments, a plurality of support portions 1031 are provided on the base 103 , and the plurality of support portions 1031 are arranged at intervals outside the outer ring groove to support the outer surface of the outer cylinder 102 , thereby preventing the outer cylinder 102 from tipping over and improving the stability of the outer cylinder 102 .

[0056] Preferably, the support portion 1031 may be a triangular rib.

[0057] In some embodiments, the mesh 104 is a steel wire mesh or a composite material mesh, which is helpful to ensure the structural strength of the segment model 3 and can better simulate the embedded steel mesh in the actual shield tunnel lining segment.

[0058] In some embodiments, the bolt installation position embedded component 105 includes an embedded tube 1051 and pads 1052 arranged at both ends of the embedded tube 1051, the pads 1052 are used to be fixed on the outer surface of the inner tube 101, and the two ends of the embedded tube 1051 are used to be inserted into the corresponding pads 1052. Among them, the embedded tube 1051 is used for the micro screw rod to pass through, and the pads 1052 are used to form a nut installation groove, which is convenient for the nut to be fixed on the screw rod; specifically, when the tubular model 2 is cut into the segment model 3, the embedded tube 1051 between the adjacent segment models 3 is also cut off, and the inner tube segment, outer tube segment and pads 1052 originally attached to the segment model 2 are removed, and the part where the pads 1052 on the segment model 3 are removed will form a nut installation groove.

[0059] In some embodiments, the embedded pipe 1051 is a plastic pipe, and the cushion block 1052 is a foam cushion block 1052. The plastic pipe and the foam cushion block 1052 are low in cost, and the plastic pipe is easy to be cut, and the foam cushion block 1052 is easy to be removed.

[0060] In some embodiments, the outer cylinder 102 is a transparent outer cylinder 102. When pouring filling material into the annular cavity of the mold body assembly 1, the filling material in the annular cavity can be observed through the transparent outer cylinder 102 so that the filling of the annular cavity meets the manufacturing standard.

[0061] In some embodiments, there are a plurality of positioning blocks, and the plurality of positioning blocks are evenly spaced, thereby facilitating the control of uniform thickness of the lining mold wall of a small-diameter shield tunnel.

[0062] The invention also proposes a method for manufacturing a small-diameter shield tunnel lining model.

[0063] According to the method for making a small-diameter shield tunnel lining model according to an embodiment of the present invention, a small-diameter shield tunnel lining model is made by using a small-diameter shield tunnel lining model making mold according to an embodiment of the present invention, and the method comprises the following steps:

[0064] S1: Assemble the mold main body component 1.

[0065] S2: pouring filling material from the upper end of the mold body assembly 1 into the annular mold cavity between the inner tube 101 and the outer tube 102 to obtain an integral tubular model 2, and then obtaining the required split segment model 3 by cutting the tubular model 2.

[0066] S3: Passing micro bolts through the bolt installation positions between two adjacent segment models 3 to fix two adjacent segment models 3 together, so as to obtain a small-diameter shield tunnel lining model.

[0067] Since the small-diameter shield tunnel lining model manufacturing method of the embodiment of the present invention adopts the small-diameter shield tunnel lining model manufacturing mold of the embodiment of the present invention to manufacture the lining model, the small-diameter shield tunnel lining model manufacturing method of the embodiment of the present invention has the same technical effect as the small-diameter shield tunnel lining model manufacturing mold of the embodiment of the present invention, and will not be repeated here.

[0068] In some embodiments, step S1 specifically includes the following sub-steps:

[0069] S11: Draw a line on the outer surface of the inner tube 101 to divide the outline of the required segment model 3, and fix the bolt installation position embedded component 105 on the outer surface of the inner tube 101 at the position where the micro bolts need to be arranged according to the line drawn on the outer surface of the inner tube 101. In other words, by drawing a line on the outer surface of the inner tube 101, it is convenient to determine the arrangement position of the bolt installation position embedded component 105. When the bolt installation position embedded component 105 includes an embedded pipe 1051 and pads 1052 for being arranged at both ends of the embedded pipe 1051, the pads 1052 are firstly fixed to the corresponding positions on both sides of the line drawn on the outer surface of the inner tube 101, and then the embedded pipe 1051 is crossed over the same line and the two ends of the embedded pipe 1051 are respectively inserted into the pads 1052 on both sides of the same line.

[0070] S12: a mesh 104 is arranged on the outer side of the inner cylinder 101, and several positioning blocks are fixed on the inner cylinder 101 at intervals and the mesh 104 is fixed at the radial middle of the positioning blocks. Specifically, a mesh 104 such as a single-layer or multi-layer steel wire mesh or a composite material mesh is wound on the outer side of the inner cylinder 101, and several positioning blocks are evenly arranged on the outer side of the inner cylinder 101, so that the mesh 104 is separated from the inner cylinder 101 by a certain distance to the radial middle of the positioning blocks, so that the mesh 104 is in the middle of the filling material during the pouring process.

[0071] S13: Fix the lower end of the inner cylinder 101 after completing step S12 on the base 103, sleeve the outer cylinder 102 outside the inner cylinder 101 and fix the lower end of the outer cylinder 102 on the base 103, and obtain the mold main body component 1. Specifically, the base 103 is provided with an inner ring groove for embedding the lower end of the inner cylinder 101 and an outer ring groove for embedding the lower end of the outer cylinder 102. The inner cylinder 101 and the outer cylinder 102 are respectively embedded in the inner ring groove and the outer ring groove, which is convenient for fixing operation and can accurately control the thickness of the small-diameter shield tunnel lining model. Further, the base 103 is provided with a plurality of support parts 1031, which are arranged at intervals on the outer edge of the outer ring groove to support the outer side of the outer cylinder 102, which can prevent the outer cylinder 102 from tipping over and improve the stability of the outer cylinder 102.

[0072] In some embodiments, step S2 specifically includes the following sub-steps:

[0073] S21: pouring filling material from the upper end of the mold body assembly 1 into the annular mold cavity between the inner cylinder 101 and the outer cylinder 102 and continuously vibrating until the entire annular mold cavity is filled to obtain an integral tubular model 2.

[0074] S22: Curing the tubular model 2 in the curing room to make the tubular model 2 reach the standard strength. Specifically, the tubular model 2 formed by the mold main body component 1 and the filling material in the mold main body component 1 is placed in the curing room for curing until the strength of the tubular model 2 reaches the marked strength, so as to improve the accuracy and reliability of subsequent test results.

[0075] S23: After step S22, the base 103 is removed, and a cutting line M is drawn at the position of the outer cylinder 102 corresponding to the inner cylinder 101, so that the tubular model 2 together with the mold main body component 1 can be cut and divided in the next step, which is conducive to obtaining a pipe segment model 3 of precise size.

[0076] S24: Cut out the segment model 3 according to the cutting line M, and number the segment models 3 in sequence. Specifically, the tubular model 2 is cut and divided together with the mold main body component 1 according to the cutting line M, and the inner tube segment and the outer tube segment attached to the segment model 3 are removed, and the segment models 3 are numbered in sequence, so that the segment models 3 can be connected in the numbered order later.

[0077] S25: Process the cut bolt installation position embedded components 105 on each segment model 3 to provide bolt installation positions for the micro bolts. Specifically, when the bolt installation position embedded components 105 include embedded pipes 1051 and pads 1052 for being arranged at both ends of the embedded pipes 1051, in step S25, the cut embedded pipes 1051 need to be cleared and the pads 1052 need to be removed, and the portion where the pads 1052 on the segment model 3 are removed forms a nut installation groove.

[0078] In some embodiments, the filling material is cement mortar or fine stone concrete, but is not limited thereto.

[0079] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0080] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A small diameter shield tunnel lining model manufacturing mold, characterized in that: include: A mold main body component, the mold main body component includes an inner cylinder, an outer cylinder, a base, a mesh, a positioning block and a bolt installation position embedded component; the inner cylinder is arranged in the outer cylinder, and the lower end of the inner cylinder and the lower end of the outer cylinder are detachably fixed to the base; the bolt installation position embedded component is used to be arranged on the inner cylinder to provide bolt installation positions between two adjacent segment models; the mesh is used to be arranged in a ring in the middle between the inner cylinder and the outer cylinder; the positioning block is used to be arranged between the inner cylinder and the outer cylinder to control the position of the outer cylinder relative to the inner cylinder and fix the mesh; Micro bolts are used to connect the bolt installation positions between two adjacent segment models.

2. The small-diameter shield tunnel lining model manufacturing mold according to claim 1 is characterized in that: The base is provided with an inner ring groove for embedding the lower end of the inner cylinder and an outer ring groove for embedding the lower end of the outer cylinder.

3. The small-diameter shield tunnel lining model manufacturing mold according to claim 2 is characterized in that: The base is provided with a plurality of supporting parts, which are arranged at intervals on the outer edge of the outer ring groove and are used to support the outer side surface of the outer cylinder.

4. The small-diameter shield tunnel lining model manufacturing mold according to claim 1 is characterized in that: The mesh is a steel wire mesh or a composite material woven mesh.

5. The small-diameter shield tunnel lining model manufacturing mold according to claim 1 is characterized in that: The bolt installation position embedded component includes an embedded pipe and pads arranged at both ends of the embedded pipe, the pads are used to be fixed on the outer surface of the inner tube, and the two ends of the embedded pipe are used to be inserted into the corresponding pads.

6. The small-diameter shield tunnel lining model manufacturing mold according to claim 5 is characterized in that: The embedded pipe is a plastic pipe, and the cushion block is a foam cushion block.

7. The small-diameter shield tunnel lining model manufacturing mold according to claim 1 is characterized in that: The outer cylinder is a transparent outer cylinder.

8. A method for making a small diameter shield tunnel lining model, characterized in that: The method of making a model using the small-diameter shield tunnel lining model making mold as claimed in any one of claims 1 to 7 comprises the following steps: S1: Assemble the mold main body components; S2: pouring a filling material from the upper end of the mold main body assembly into the annular mold cavity between the inner tube and the outer tube to obtain an integral tubular model, and then cutting the tubular model to obtain the required split segment model; S3: Passing the micro bolts through the bolt installation positions between the two adjacent segment models to fix the two adjacent segment models together, so as to obtain a small-diameter shield tunnel lining model.

9. The method for making a small-diameter shield tunnel lining model according to claim 8, characterized in that: Step S1 specifically includes the following sub-steps: S11: drawing lines on the outer surface of the inner tube to divide the required contour of the segment model, and fixing the bolt installation position embedded component on the outer surface of the inner tube at the position where the micro bolts need to be arranged according to the lines drawn on the outer surface of the inner tube; S12: a mesh is arranged on the outer side of the inner cylinder, a plurality of the positioning blocks are fixed on the inner cylinder at intervals, and the mesh is fixed at the radial middle of the positioning blocks; S13: Fixing the lower end of the inner cylinder after completing step S12 on the base, sleeve the outer cylinder outside the inner cylinder and fix the lower end of the outer cylinder on the base to obtain the mold main body assembly.

10. The method for making a small diameter shield tunnel lining model according to claim 9, characterized in that: Step S2 specifically includes the following sub-steps: S21: pouring filling material from the upper end of the mold body assembly into the annular mold cavity between the inner cylinder and the outer cylinder and continuously vibrating until the entire annular mold cavity is filled to obtain the integral tubular model; S22: curing the tubular model in a curing room to make the tubular model reach a standard strength; S23: after step S22, the base is removed, and a cutting line is drawn at a position of the outer cylinder corresponding to the inner cylinder; S24: cutting out the segment models according to the cutting lines, and numbering the segment models in sequence; S25: Processing the cut embedded components of the bolt installation positions on each of the segment models to provide bolt installation positions for the micro bolts.

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