Reinforcing steel bar confined concrete shield segment suitable for laser scanning recognition and manufacturing method of reinforcing steel bar confined concrete shield segment

Abstract

The invention discloses a steel bar confined concrete shield segment suitable for laser scanning recognition and a manufacturing method, and belongs to the technical field of coal mine supporting engineering, the steel bar confined concrete shield segment comprises a plurality of segment prefabricated assemblies which are spliced and fixed in the annular direction, and each segment prefabricated assembly comprises an annular steel bar cage which is a framework formed by the segment prefabricated assemblies; the multiple sets of spiral ribs and annular structural ribs annularly extend in the annular reinforcement cage and are axially distributed at intervals, and the spiral ribs and the annular structural ribs are adjacent to each other and are fixedly connected with the annular reinforcement cage through positioning pieces; the concrete comprises protective layer concrete, interlayer concrete and core concrete, the protective layer concrete covers the outer side of the annular reinforcement cage, and the space between the annular reinforcement cage and the spiral ribs is filled with the interlayer concrete. According to the method, the material utilization rate is increased, the production cost is reduced, and the roadway excavation volume in the construction process that the inclined shaft of the coal mine is supported by the duct pieces is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to a laser scanning identification suitable steel reinforced concrete shield segment and a manufacturing method thereof, and belongs to the technical field of coal mine support engineering. BACKGROUND

[0002] The shield segment is a main assembly component of the coal mine inclined shaft shield construction, is the innermost layer barrier of the coal mine inclined shaft, and bears the action of resisting the earth pressure, the underground water pressure and some special loads. The shield segment is a permanent lining structure of the coal mine inclined shaft roadway, and the shield method is a safe, efficient and environmentally friendly method in the construction of the coal mine inclined shaft roadway. The segment is used as a lining support structure in the shield method construction.

[0003] At present, the lining segment commonly used in the shield method construction is a reinforced concrete segment. In order to meet the bearing capacity requirement of the support segment of the lining of the inclined shaft under the deep buried condition, the reinforced concrete segment has problems of large volume, obvious brittle failure characteristics and high material consumption. SUMMARY

[0004] The present application aims at overcoming the deficiencies in the prior art, providing a laser scanning identification suitable steel reinforced concrete shield segment and a manufacturing method thereof. Compared with the traditional reinforced concrete segment, the bearing capacity is improved while the segment thickness is reduced, so as to improve the material utilization rate, reduce the production cost, and reduce the excavation amount of the coal mine inclined shaft roadway in the construction process.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0006] In a first aspect, the present application provides a laser scanning identification suitable steel reinforced concrete shield segment, which comprises a plurality of circumferentially spliced and fixed segment prefabricated components. Each segment prefabricated component comprises:

[0007] A ring-shaped reinforcement cage, which is a component framework of the segment prefabricated component;

[0008] A spiral rib and a ring-shaped structural rib, a plurality of groups of the spiral rib and the ring-shaped structural rib extend along the inside of the ring-shaped reinforcement cage in a circumferential direction and are distributed in an axial direction, the spiral rib and the ring-shaped structural rib are adjacent to each other and are fixedly connected with the ring-shaped reinforcement cage through a positioning member;

[0009] Concrete, which comprises a protective layer concrete, a sandwich layer concrete and a core concrete, the protective layer concrete is coated on the outside of the ring-shaped reinforcement cage, the sandwich layer concrete is filled between the ring-shaped reinforcement cage and the spiral rib, and the core concrete is filled in the internal space of the spiral rib.

[0010] Further, the ring-shaped reinforcement cage comprises ring-shaped main reinforcement, radial reinforcement and axial reinforcement, the ring-shaped main reinforcement is distributed along the radial direction and the axial direction of the segment, the radial reinforcement is distributed along the ring direction and the axial direction of the segment, the axial reinforcement is distributed along the ring direction and the radial direction of the segment, the radial reinforcement and the axial reinforcement form a rectangular frame, and a plurality of rectangular frames are connected in series along the ring direction by the ring-shaped main reinforcement.

[0011] Further, the ring-shaped reinforcement cage has a plurality of closed sub-chambers in the interior, the cross section of the closed sub-chamber is configured as a rectangle, and a spiral reinforcement strip is fixedly arranged at the center of the closed sub-chamber.

[0012] Further, the spiral reinforcement strips are distributed in the closed sub-chambers in a spaced manner or in a sequential manner.

[0013] Further, a plurality of ring-shaped construction reinforcements adjacent to the spiral reinforcement strip are distributed in a circumferential direction in the space defined by the spiral reinforcement strip.

[0014] Further, the spiral reinforcement strip and the ring-shaped construction reinforcement are connected by binding or fixed by welding.

[0015] Further, the ring-shaped construction reinforcement is an arc-shaped steel pipe or a steel bar.

[0016] Further, the segments are assembled by using a through joint or a staggered joint, and the abutting surfaces of two adjacent segment precast assemblies are coated with sealant before being fastened by bolts.

[0017] Further, the spiral reinforcement strip is at least partially embedded in the core concrete.

[0018] In a second aspect, the application provides a method for manufacturing a shield segment of reinforced concrete suitable for laser scanning identification, comprising:

[0019] After the ring-shaped construction reinforcement and the spiral reinforcement strip are connected by binding, the spiral reinforcement strip and the ring-shaped construction reinforcement are fixedly connected to the ring-shaped reinforcement cage by positioning members to form a reinforcement framework, wherein a plurality of groups of the spiral reinforcement strip and the ring-shaped construction reinforcement extend along the interior of the ring-shaped reinforcement cage in a ring direction and are distributed in a spaced manner in an axial direction.

[0020] The reinforcement framework is placed in a to-be-poured mold, and a certain distance is left between the two.

[0021] The segment precast assembly is made by pouring concrete into the to-be-poured mold, wherein the concrete comprises a protective layer concrete, a sandwich concrete and a core concrete, the protective layer concrete is wrapped on the outside of the ring-shaped reinforcement cage, the sandwich concrete is filled between the ring-shaped reinforcement cage and the spiral reinforcement strip, and the core concrete is filled in the interior space of the spiral reinforcement strip.

[0022] After the multiple pipe segments are coated with sealant along the ring direction, the pipe segments are adhered to each other and connected by bolts to form a complete ring structure.

[0023] Compared with the prior art, the present application has the following beneficial effects:

[0024] Firstly, the spiral rib is embedded in the concrete in the annular reinforcement cage, and the spiral rib is used to constrain the core concrete in the annular reinforcement cage. The core concrete is doubly constrained by the annular reinforcement cage and the spiral rib, and the strength of the core concrete is improved in multiple directions, thereby improving the bearing capacity of the reinforced concrete pipe segment. Compared with the traditional reinforced concrete pipe segment, not only the bearing capacity is improved, but also the thickness of the shield pipe segment is reduced, the material utilization rate is improved, the production cost is reduced, and the amount of excavation in the process of pipe segment supporting construction of the coal mine inclined shaft is reduced. Meanwhile, the reinforced concrete shield pipe segment can identify the problems such as poor tightness and poor waterproofness in the assembling process by using a three-dimensional laser scanner.

[0025] Secondly, the main framework of the reinforced concrete shield pipe segment prefabricated assembly is an annular reinforcement cage, which is simple to process and manufacture. The spiral rib is fixed by the annular structural rib to ensure that the spacing between the spiral parts is consistent. On the premise of meeting the design requirements, the processing and manufacturing difficulty of the reinforced concrete shield pipe segment prefabricated assembly is reduced to the greatest extent, and the processing and manufacturing efficiency is improved. The reinforced concrete shield pipe segment prefabricated assembly is connected by bolts, and the connection method is simple and reliable. The reinforced concrete shield pipe segment is easy to form. BRIEF DESCRIPTION OF DRAWINGS

[0026] The drawings accompanying the specification of the present application form a part thereof, serve to provide further understanding of the present application, and together with the description of the exemplary embodiments of the present application, serve to explain the present application, and do not constitute any improper limitation to the present application. In the drawings:

[0027] Figure 1 A pipe segment prefabricated assembly of the reinforced concrete shield pipe segment suitable for laser scanning identification is provided for the embodiment of the present application;

[0028] Figure 2 A pipe segment prefabricated assembly of the reinforced concrete shield pipe segment suitable for laser scanning identification is provided for the embodiment of the present application;

[0029] Figure 3 A pipe segment prefabricated assembly of the reinforced concrete shield pipe segment suitable for laser scanning identification is provided for the embodiment of the present application;

[0030] Figure 4 A pipe segment prefabricated assembly of the reinforced concrete shield pipe segment suitable for laser scanning identification is provided for the embodiment of the present application;

[0031] Figure 5 A binding schematic diagram of spiral rib, annular structural rib and positioning member of the laser scanning identified steel reinforced concrete shield segment provided by the embodiment of the present application;

[0032] Figure 6 A laser scanning identified steel reinforced concrete shield segment provided by the embodiment of the present application;

[0033] Figure 7 A manufacturing method flowchart of the laser scanning identified steel reinforced concrete shield segment provided by the embodiment of the present application.

[0034] In the figure: 1, annular steel reinforcement cage; 11, annular main rib; 12, radial steel reinforcement; 13, axial steel reinforcement; 2, spiral rib; 3, annular structural rib; 4, positioning member; 5, concrete; 51, protective layer concrete; 52, interlayer concrete; 53, core concrete. DETAILED DESCRIPTION

[0035] The present application will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0036] The following detailed description is exemplary description, which is intended to provide further detailed description of the present application. Unless otherwise specified, all technical terms used in the present application have the same meaning as generally understood by those skilled in the art to which the present application belongs. The terms used in the present application are only for the purpose of describing the specific embodiments, and are not intended to limit the exemplary embodiments according to the present application.

[0037] Embodiment:

[0038] The present embodiment provides a laser scanning identified steel reinforced concrete shield segment suitable for laser scanning identification. The steel reinforced concrete shield segment as permanent lining of coal mine inclined shaft needs to bear the action of stratum earth pressure, underground water pressure and other loads. The shield segment integrates the functions of structural bearing, waterproof sealing and construction efficiency, and is a key component for safe and efficient construction of inclined shaft. In the steel reinforced concrete shield segment, the steel reinforcement is arranged in a dense grid shape (such as annular and longitudinal steel reinforcement) to constrain the concrete, so that it is not easy to crack under pressure, and at the same time bears tensile stress, improving the overall bending and shearing capacity of the segment.

[0039] Reference Figure 1 , Figure 2 and Figure 3The reinforced concrete shield segment is composed of a plurality of arc-shaped reinforced concrete segment prefabricated assemblies, each of which comprises a ring-shaped reinforcement cage 1, a spiral reinforcement bar 2, a ring-shaped structural reinforcement bar 3, a positioning member 4 and concrete 5. The ring-shaped reinforcement cage 1 serves as the main framework of the segment prefabricated assembly, and is wrapped inside the segment prefabricated assembly and accommodates the spiral reinforcement bar 2, the ring-shaped structural reinforcement bar 3, the positioning member 4 and the concrete 5. After the ring-shaped reinforcement cage 1, the spiral reinforcement bar 2 and the ring-shaped structural reinforcement bar 3 are fixedly connected, a reinforced concrete shield segment framework is formed, and then a formwork is erected outside the framework, and finally the concrete 5 is poured into the formwork. After the pouring of the concrete 5 is completed, the connection between the ring-shaped reinforcement cage 1, the spiral reinforcement bar 2 and the ring-shaped structural reinforcement bar 3 is more stable. The spiral reinforcement bar 2 is a spiral structure arranged inside the ring-shaped reinforcement cage 1 and extending in the circumferential direction of the ring-shaped reinforcement cage 1. The spiral reinforcement bar 2 is constructed in a plurality of parts and the plurality of spiral reinforcement bars 2 are spaced apart in the axial direction of the ring-shaped reinforcement cage 1.

[0040] It should be noted that the concrete 5 includes a protective layer concrete 51 outside the ring-shaped reinforcement cage 1, a sandwich concrete 52 flowing into the space between the spiral reinforcement bar 2 and the ring-shaped reinforcement cage 1, and a core concrete 53 in the space defined by the spiral reinforcement bar 2. The spiral reinforcement bar 2 provides a restraining action for the core concrete 53; the ring-shaped reinforcement cage 1 and the spiral reinforcement bar 2 provide a combined restraining action for the core concrete 53, and the ring-shaped reinforcement cage 1 also provides a restraining action for the sandwich concrete 52, thereby improving the strength of the concrete 5 and the load-bearing capacity of the shield segment.

[0041] The spiral reinforcement bar 2 is at least partially embedded in the concrete 5, for example, the spiral reinforcement bar 2 extends in the circumferential direction of the ring-shaped reinforcement cage 1 and has a length flush with the ring-shaped reinforcement cage 1. The spiral reinforcement bar 2, as a reinforcing bar of the reinforced concrete shield segment, provides a restraining action for the core concrete 53, so that the internal strength of the reinforced concrete shield segment is improved in multiple directions, thereby improving the load-bearing capacity of the reinforced concrete shield segment. The shield segment of the present embodiment has the spiral reinforcement bar 2 arranged inside the ring-shaped reinforcement cage 1, so that the reinforcing bar inside the ring-shaped reinforcement cage 1 is different from the existing reinforcing bar (for example, a straight line type or a horizontal and vertical staggered type), and has a stronger load-bearing capacity. Therefore, fewer spiral reinforcement bars 2 can be used to achieve the same load-bearing capacity, the material utilization rate is improved, and the use cost of the reinforcing bar is greatly reduced. In addition, the ring-shaped reinforcement cage 1 cooperates with the spiral reinforcement bar 2 to provide a double restraining action for the core concrete 53 inside the spiral reinforcement bar 2, and the load-bearing performance of the shield segment is better. Compared with the traditional reinforced concrete segment, the thickness of the shield segment is reduced, the amount of excavation of the well and roadway is reduced, and the production cost is reduced.

[0042] Please refer to Figure 4The annular reinforcement cage 1 of the embodiment comprises a hoop reinforcement 11, a radial reinforcement 12, and an axial reinforcement 13, and the types of the three reinforcements can be different. The annular reinforcement cage 1 is in the shape of a circular arc, and the longitudinal section of the sub-chamber formed inside is in the shape of a rectangle. The cross section of the sub-chamber is designed to be a rectangle, which is beneficial to the processing and manufacturing of the reinforced concrete shield segment, and at the same time reduces the generation of eccentric force in the cross section of the sub-chamber. A plurality of annular reinforcement cages 1 can be spliced end to end in the circumferential direction of the segment to form a circular ring. It should be noted that the plurality of annular reinforcement cages 1 can be five, six, seven, etc. in number, which is designed according to the actual working condition.

[0043] A plurality of radial reinforcements 12 and axial reinforcements 13 can be arranged in the annular reinforcement cage 1. The number of radial reinforcements 12 can be set as needed, such as three, four, five, etc. A plurality of radial reinforcements 12 are spaced apart along the axial direction of the annular reinforcement cage 1, thereby dividing the internal space of the annular reinforcement cage 1 into a plurality of sub-chambers, and each sub-chamber extends along the circumferential direction of the annular reinforcement cage 1. The internal space of the annular reinforcement cage 1 is divided into a plurality of sub-chambers by the radial reinforcements 12 and the axial reinforcements 13, which facilitates the placement of the spiral reinforcement bars 2.

[0044] At least part of the sub-chambers is provided with a spiral reinforcement bar 2. In the embodiment, one spiral reinforcement bar 2 is arranged in each sub-chamber. In other embodiments, one spiral reinforcement bar 2 can be arranged in every other sub-chamber. When the number of spiral reinforcement bars 2 is set, the required bearing capacity of the shield segment can be designed according to the required bearing capacity of the shield segment. The higher the required bearing capacity of the shield segment, the more spiral reinforcement bars 2 can be used.

[0045] In order to improve the constraint effect of the annular reinforcement cage 1 and the spiral reinforcement bar 2 on the concrete 5, preferably, the cross section of the sub-chamber is designed to be a rectangle, and further can be designed to be a square. By designing the cross section to be a square, the spiral reinforcement bar 2 is buried in the central position of the sub-chamber, so that the thickness of the interlayer concrete 52 between the annular reinforcement cage 1 and the spiral reinforcement bar 2 is relatively more uniform, thereby improving the constraint effect of the annular reinforcement cage 1 on the interlayer concrete 52.

[0046] Referring to Figure 2 and Figure 5The annular construction rib 3 is arranged in the inner space of the annular reinforcement cage 1 and extends along the circumference of the annular reinforcement cage 1 and is adjacent to the spiral rib 2. The annular construction rib 3 is embedded in the concrete 5 to provide circumferential bearing capacity for the shield segment, and further improves the bearing capacity of the shield segment. The annular construction rib 3 can be arranged inside or outside the space defined by the spiral rib 2. In this embodiment, the annular construction rib 3 is arranged inside the space defined by the spiral rib 2, and the annular construction rib 3 is fixedly connected with the spiral rib 2. By fixing the spiral rib 2 on the annular construction rib 3, the spiral rib 2 and the annular construction rib 3 form a reinforcing structure assembly, thereby further improving the bearing capacity of the shield segment. In addition, the annular construction rib 3 can also play a positioning role for the spiral rib 2. Finally, the spiral rib 2 and the annular construction rib 3 are connected and fixed with the annular reinforcement cage 1 through the positioning member 4.

[0047] The spiral rib 2 includes a plurality of spiral portions 21, each of which is fixedly connected with the annular construction rib 3. The fixed connection can be binding connection or welding. In this embodiment, the fixed connection is binding connection. By connecting each spiral portion 21 with the annular construction rib 3, the extension length of each spiral portion 21 is controlled. In addition, the extension lengths of each spiral portion 21 are equal, so that the spiral rib 2 can uniformly constrain the core concrete 53, thereby improving the constraint effect of the spiral rib 2 on the core concrete 53.

[0048] The annular construction rib 3 is designed as a plurality of annular construction ribs 3 which are spaced apart along the circumference of the spiral rib 2. In this embodiment, the number of annular construction ribs 3 is two, and in other embodiments, the number of annular construction ribs 3 can also be other numbers. The plurality of annular construction ribs 3 further provides circumferential bearing capacity for the shield segment, and the plurality of annular construction ribs 3 are spaced apart along the circumference of the spiral rib 2. Each spiral portion 21 is fixedly connected with the plurality of annular construction ribs 3, further improving the uniformity of the spiral portion 21 and improving the constraint effect of the spiral rib 2 on the core concrete 53. The number of annular construction ribs 3 is preferably an even number (for example, four or six), and the even number of annular construction ribs 3 are symmetrically arranged in the axial direction and the radial direction of the shield segment, so as to facilitate uniform stress of the annular construction rib 3.

[0049] By adopting the shield segment of this embodiment, the spiral rib 2 is embedded in the concrete 5 of the segment, the core concrete 53 in the annular reinforcement cage 1 is constrained by the spiral rib 2, and the bearing capacity of the shield segment is further improved. Therefore, when designing the shield segment, the thickness of the segment can be correspondingly reduced under the premise of meeting the bearing capacity requirement, so as to reduce the material usage, improve the material utilization rate, and reduce the production cost. In addition, by reducing the thickness of the shield segment, the excavation amount of the coal mine inclined shaft roadway in the construction process can also be reduced, and the construction efficiency is improved.

[0050] In the embodiment, the annular construction rib 3 is bent from a steel bar. In other embodiments, the annular construction rib 3 can also be an arc-shaped steel pipe. In this way, the weight of the shield segment can be further reduced, and the overall cost of the shield segment is reduced. The annular construction rib 3 is multiple, and the multiple annular construction ribs 3 are arranged on the inner side or the outer side of the spiral rib 2. In the embodiment, the multiple annular construction ribs 3 are arranged on the inner side of the spiral rib 2. The multiple annular construction ribs 3 can be fixedly connected with the spiral rib 2. In this way, not only a whole reinforcing structure can be formed, but also the multiple annular construction ribs 3 can position the spiral rib 2, and the size of the gap on the spiral rib 2 can be adjusted. When the reinforced concrete shield segment is designed, according to the bearing capacity requirement, the spiral rib is arranged in at least part of the closed sub-chamber, so as to improve the material utilization rate, and reduce the production cost of the segment under the premise of meeting the bearing capacity requirement.

[0051] The spiral rib 2 includes multiple spiral parts 21 arranged in sequence. Before the spiral rib 2 is placed in the annular steel cage 1, the annular construction rib 3 is fixedly connected with the spiral rib 2, so as to adjust the length of the multiple spiral parts 21 in the extension direction of the spiral rib 2.

[0052] According to the technical scheme, the annular construction rib 3 is fixedly connected with the spiral rib 2. On the one hand, the extension length of each spiral part 21 can be controlled. On the other hand, the spiral rib 2 can be positioned by the annular construction rib 3 before the concrete 5 is poured. Before the concrete 5 is poured, the worker positions the two ends of the annular construction rib 3 by the positioning member 4, so as to fix the spiral rib 2 fixedly connected with the annular construction rib 3, and make the spiral rib 2 suspended in the annular steel cage 1, so that the spiral rib 2 can constrain the core concrete 53. The material of the positioning member 4 is a material that can be welded, such as iron, steel and the like.

[0053] The spiral rib 2 is fixedly arranged at the center position of the closed sub-chamber. The spiral rib 2 can effectively reduce the influence of the eccentric force on the cross section of the sub-chamber, and make the thickness of the interlayer concrete 52 between the spiral rib 2 and the annular steel cage 1 relatively more uniform, so as to improve the constraining effect of the annular steel cage 1 on the interlayer concrete 52. Please refer to Figure 6 The worker should prepare the mold of the reinforced concrete shield segment in advance, and place the bundled steel framework (the annular steel cage 1, the spiral rib 2, the annular construction rib 3 and the positioning member 4) in the mold.

[0054] Please refer to Figure 7 The specific steps of manufacturing the shield segment are as follows:

[0055] S1: Preparing the annular steel cage 1, the spiral rib 2 and the annular construction rib 3;

[0056] S2: After the spiral rib 2 and the ring-shaped construction rib 3 are connected through binding, the components are fixed inside the ring-shaped reinforcement cage 1 through the positioning member 4, to form a reinforcement framework;

[0057] S3: The reinforcement framework is placed in a mold, and concrete is poured, a certain distance is left between the reinforcement framework and each part of the mold, the distance is the thickness of the protective layer concrete 51, and then the concrete 5 is poured;

[0058] S4: The concrete is cured to the required strength, to obtain a prefabricated assembly of a shield segment, and finally, a plurality of prefabricated assemblies of the shield segment are fixed and connected through bolts, to form a complete reinforced concrete shield segment.

[0059] It should be noted that, before two circumferentially adjacent prefabricated assemblies of the shield segment are attached to each other, sealing glue is applied to the attachment surface, and then the two shield segments are circumferentially spliced through bolts; the sealing glue applied to the joint of the shield segment reduces the possibility of penetration of the coal mine inclined shaft. It should be noted that, in the embodiment, the coal mine inclined shaft is formed by splicing the shield segments in a straight joint manner, and in other embodiments, the coal mine inclined shaft can also be formed by splicing the shield segments in a staggered joint manner.

[0060] The scheme improves the strength of the core concrete 53 in the reinforced concrete shield segment in multiple directions by embedding the spiral rib 2 in the concrete 5 in the ring-shaped reinforcement cage 1, and restraining the core concrete 53 in the ring-shaped reinforcement cage 1 by the spiral rib 2, thereby improving the bearing capacity of the reinforced concrete shield segment. Therefore, when designing the shield segment, the thickness of the shield segment can be correspondingly reduced under the premise of meeting the bearing capacity requirement, to achieve the effects of reducing the amount of material, improving the utilization rate of material, and reducing the production cost; in addition, by reducing the thickness of the shield segment, the excavation amount of the inclined shaft in the construction process is also reduced, thereby improving the construction efficiency.

[0061] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0062] In the description of the present application, "first feature" and "second feature" can include one or more features.

[0063] In the description of the present application, the meaning of "a plurality of" is two or more.

[0064] In the description of the application, the first feature is "on" or "under" the second feature can include the first and second features are in direct contact, but also can include the first and second features are not in direct contact but through the additional features between them are in contact.

[0065] In the description of the application, the first feature is "on", "above" and "over" the second feature includes the first feature is directly above and obliquely above the second feature, or just means that the first feature is higher than the second feature in height.

[0066] In the description of the application, the description of the reference terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" and the like 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 application. In the description of the application, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0067] Although the embodiments of the application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the application, and the scope of the application is defined by the claims and their equivalents.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the application and not to limit it, although the application has been described in detail with reference to the above embodiments, those skilled in the art should understand that the specific embodiments of the application can be modified or replaced, and any modification or equivalent replacement without departing from the spirit and scope of the application should be covered within the protection scope of the claims of the application.

Claims

1. A reinforced concrete shield tunnel segment suitable for laser scanning identification, characterized in that, It includes multiple prefabricated tunnel segment assemblies that are spliced ​​and fixed along the circumferential direction, each of the prefabricated tunnel segment assemblies comprising: Annular steel cage (1), wherein the annular steel cage (1) is the structural skeleton of the precast segment assembly; Spiral reinforcement bars (2) and annular structural reinforcement bars (3), multiple sets of the spiral reinforcement bars (2) and annular structural reinforcement bars (3) extend circumferentially along the inside of the annular steel cage (1) and are axially spaced. The spiral reinforcement bars (2) and annular structural reinforcement bars (3) are adjacent to each other and are fixedly connected to the annular steel cage (1) by positioning members (4). Concrete (5), which includes protective concrete (51), interlayer concrete (52) and core concrete (53), the protective concrete (51) covering the outside of the annular reinforcing cage (1), the interlayer concrete (52) filling the space between the annular reinforcing cage (1) and the spiral reinforcing bar (2), and the core concrete (53) filling the space inside the spiral reinforcing bar (2).

2. The reinforced concrete shield tunnel segment suitable for laser scanning identification according to claim 1, characterized in that, The annular steel cage (1) includes circumferential main bars (11), radial bars (12) and axial bars (13). The circumferential main bars (11) are distributed at intervals along the radial and axial directions of the pipe segment. The radial bars (12) are distributed at intervals along the circumferential and axial directions of the pipe segment. The axial bars (13) are distributed at intervals along the circumferential and radial directions of the pipe segment. The radial bars (12) and axial bars (13) form a rectangular frame, and multiple rectangular frames are connected in series along the circumferential direction through the circumferential main bars (11).

3. The reinforced concrete shield tunnel segment suitable for laser scanning identification according to claim 2, characterized in that, The annular steel cage (1) has multiple closed sub-chambers inside. The cross-sectional structure of the closed sub-chamber is rectangular, and the spiral reinforcement (2) is fixedly set at the center of the closed sub-chamber.

4. The reinforced concrete shield tunnel segment suitable for laser scanning identification according to claim 3, characterized in that, The spiral ribs (2) are distributed at intervals or sequentially within each closed sub-cavity.

5. The reinforced concrete shield tunnel segment suitable for laser scanning identification according to claim 1, characterized in that, There are multiple annular structural ribs (3) adjacent to the spiral rib (2), and the multiple annular structural ribs (3) are located inside or outside the space defined by the spiral rib (2) and distributed circumferentially.

6. The reinforced concrete shield tunnel segment suitable for laser scanning identification according to claim 1, characterized in that, The spiral reinforcement (2) and the annular structural reinforcement (3) are fixed by binding or welding.

7. The reinforced concrete shield tunnel segment suitable for laser scanning identification according to claim 1, characterized in that, The annular structural reinforcement (3) is an arc-shaped steel pipe or a steel bar.

8. The reinforced concrete shield tunnel segment suitable for laser scanning identification according to claim 1, characterized in that, The precast segments are assembled with either through joints or staggered joints, and the mating surfaces of two adjacent precast segments are first coated with sealant before being fastened with bolts.

9. The reinforced concrete shield tunnel segment suitable for laser scanning identification according to claim 1, characterized in that, The spiral reinforcement bar (2) is at least partially embedded in the core concrete (53).

10. A method for fabricating reinforced concrete shield tunnel segments using laser scanning identification, characterized in that: include: After the annular structural reinforcement (3) and the spiral reinforcement (2) are tied together, they are fixedly connected to the annular steel cage (1) by the positioning piece (4) to form a steel reinforcement skeleton. The multiple sets of the spiral reinforcement (2) and the annular structural reinforcement (3) extend circumferentially along the inside of the annular steel cage (1) and are axially spaced. Place the steel reinforcement cage in the mold to be poured, leaving a certain distance between them; Concrete (5) is poured into the mold to be poured to form precast segments. The concrete (5) includes protective concrete (51), interlayer concrete (52) and core concrete (53). The protective concrete (51) covers the outside of the annular steel cage (1), the interlayer concrete (52) fills the space between the annular steel cage (1) and the spiral reinforcement (2), and the core concrete (53) fills the space inside the spiral reinforcement (2). After applying sealant to multiple precast tunnel segments along the circumference, they are attached to each other and fixed together with bolts to form a complete ring structure.

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