Modularized tunnel secondary lining reinforcement cage structure

Abstract

The utility model discloses a modularized tunnel secondary lining reinforcement cage structure. A reinforcement cage is composed of a plurality of module units which are connected with one another. The module units are divided through longitudinal segmentation and transverse fragmentation; each module unit comprises a main reinforcement, a structural reinforcement and a pre-embedded sleeve; the adjacent module units are directly connected with the main reinforcements or the structural reinforcements through the sleeves to form a continuous stress structure. Through modular design and assembly type construction, the construction efficiency and quality of the tunnel secondary lining reinforcement cage are remarkably improved, the labor intensity and the safety risk are reduced, and good economic benefits and social benefits are achieved.

Description

Technical Field

[0001] This utility model belongs to the field of tunnel engineering construction technology, specifically relating to a modular tunnel secondary lining steel cage structure, which can realize prefabrication outside the tunnel and rapid assembly inside the tunnel, and is suitable for concrete secondary lining construction of underground railways, railway tunnels and other similar projects. Background Technology

[0002] China has a vast number of tunnels already built and under construction, and many more underground railway tunnels using the shallow-buried cut-and-cover method will enter the construction phase in the future. In tunnel construction, the initial support grid arch frame typically employs a process of prefabricating sections outside the tunnel and connecting them inside using angle steel or steel plates with bolts, offering good construction convenience. However, the secondary lining reinforcement construction has long followed a traditional method: individual steel bars are prefabricated outside the tunnel and transported inside, where they are individually tied or welded to form a reinforcement cage, which is then placed in place by a formwork trolley and the concrete is poured to complete the lining construction.

[0003] Traditional single-strand processing and in-hole binding techniques have significant drawbacks:

[0004] Long construction time: The construction cycle of reinforced concrete secondary lining is usually 7 days per formwork, of which concrete curing takes 3 days, steel bar binding takes 3 days, and the remaining procedures take about 1 day. Binding is the most time-consuming and critical step.

[0005] Low processing and transportation efficiency: Processing a single steel bar outside the tunnel requires frequent equipment adjustments, which limits the processing speed; and due to the limited length of the steel bar, the amount transported per trip is small, while the transfer inside the tunnel relies on manual labor in conjunction with small machinery, resulting in low efficiency throughout the entire process.

[0006] Construction quality control is difficult: manual binding inside the tunnel is prone to collisions that can damage the waterproofing membrane; the control of rebar spacing relies on construction experience, making it difficult to meet design accuracy requirements; the thickness of the concrete protective layer is also difficult to control due to positioning deviations, which directly affects the durability of the lining structure.

[0007] Addressing the aforementioned industry pain points, this utility model innovatively achieves "external processing and internal installation" of secondary lining steel bars through prefabricated steel cage mesh outside the tunnel, mechanized transportation and installation, and modular connection technology, fundamentally improving construction efficiency and quality control. Summary of the Invention

[0008] This application provides a modular tunnel secondary lining reinforcement cage structure, which divides the reinforcement cage into modular units. Through reasonable connection methods and structural design, the modules are effectively connected to form a continuous load-bearing structure. At the same time, a fixing hole structure is set to facilitate mechanical installation, which aims to improve the construction efficiency of the reinforcement cage, enhance structural stability and installation convenience.

[0009] To solve the above-mentioned technical problems, the technical solution proposed in this application is as follows:

[0010] This invention provides a modular tunnel secondary lining reinforcement cage structure, wherein the reinforcement cage is composed of multiple interconnected modular units;

[0011] The module unit is divided into longitudinal segments and transverse sections. The longitudinal segments are cut into lengths of 4-6m along the tunnel axis, and the transverse sections are cut into 3-5 pieces along the tunnel cross-section.

[0012] Each module unit includes main reinforcement, structural reinforcement, and embedded sleeve;

[0013] Adjacent module units are directly connected to the main reinforcement or structural reinforcement through sleeves to form a continuous stress-bearing structure.

[0014] Furthermore, the sleeve is welded to the end of the main reinforcement or structural reinforcement, and the inner diameter of the sleeve matches the outer diameter of the main reinforcement or structural reinforcement, and is fixed by interference fit or threaded connection.

[0015] Furthermore, the sleeve is a steel round tube with a threaded inner wall, which is screwed and locked to the threaded section at the end of the main reinforcement or structural reinforcement.

[0016] Furthermore, the longitudinal segment is cut at the annular closed node of the main reinforcement, and a sleeve is provided at the end of the segment. The axis of the sleeve is parallel to the tunnel axis, and adjacent segments are connected and welded together by inserting the sleeve.

[0017] Furthermore, the cutting position of the transverse segment is located at the intersection node of the main reinforcement of the tunnel cross section, and a sleeve is provided at the edge of the segment. The axis of the sleeve is perpendicular to the tunnel axis, and adjacent segments are connected and welded together by inserting the sleeve.

[0018] Furthermore, the main reinforcement bars are Φ20-Φ32mm threaded steel bars, arranged in a closed ring along the inner wall of the tunnel, with a spacing of 200-300mm and an error of ≤5mm; the structural reinforcement bars include horizontal stirrups and longitudinal connecting bars, which are welded perpendicularly to the main reinforcement bars to form a grid skeleton.

[0019] Furthermore, it also includes a jack robotic arm fixing hole structure, the fixing hole structure comprising:

[0020] Steel plates are welded vertically to the surface of the main reinforcing bars;

[0021] Channel steel, welded to a steel plate, with the channel steel axis perpendicular to the tunnel axis;

[0022] The fixing hole is made on the web of the channel steel, and the diameter of the hole is adapted to the size of the robotic arm gripper.

[0023] Furthermore, the fixing hole structure is arranged at intervals of 1.5-2m on the surface of the module unit, with 3-5 sets in each module unit, and the position is adapted to the grasping path of the robotic arm.

[0024] Compared with existing technologies, the modular tunnel secondary lining steel cage structure of the present invention achieves the following beneficial technical effects:

[0025] This application presents a modular secondary lining reinforcement cage structure for tunnels, enabling prefabrication and installation of the reinforcement cage outside the tunnel. The use of sleeve mechanical connections for main and structural reinforcement significantly improves structural integrity and connection reliability, avoiding the quality risks associated with traditional tying or welding. The construction process drastically reduces tunnel working time, lowers reliance on manual labor, effectively protects the integrity of the waterproofing membrane, and eliminates the risk of leakage. The modular design ensures high precision in reinforcement cage forming and accurate installation positioning, significantly improving construction efficiency while saving material waste and reducing overall costs, providing an efficient, stable, and environmentally friendly solution for tunnel engineering. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a transverse schematic diagram of a modular tunnel secondary lining steel cage structure provided in an embodiment of the present invention.

[0028] Figure 2 This is a cross-sectional view of a modular tunnel secondary lining steel cage structure provided in an embodiment of the present invention.

[0029] Figure 3 This is an enlarged view of the fixing point of the jack robotic arm in a modular tunnel secondary lining steel cage structure provided in an embodiment of the present invention. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] like Figure 1 , Figure 2 and Figure 3As shown in this embodiment of the application, a modular tunnel secondary lining reinforcement cage structure is provided. The reinforcement cage is composed of multiple interconnected modular units 100. The modular units are divided by longitudinal segmentation and transverse slab division. The longitudinal segmentation is cut into lengths of 4-6m along the tunnel axis, and the transverse slab division is cut into 3-5 pieces along the tunnel cross-section. Each modular unit includes a main reinforcement 101, a structural reinforcement 102, and a pre-embedded sleeve 103. Adjacent modular units are directly connected to the main reinforcement 101 or the structural reinforcement 102 through the sleeve 103 to form a continuous load-bearing structure.

[0032] In the embodiments of this application, the sleeve 103 is welded to the end of the main reinforcement 101 or the structural reinforcement 102, and the inner diameter of the sleeve matches the outer diameter of the main reinforcement or the structural reinforcement, and is fixed by interference fit or threaded connection.

[0033] In the embodiments of this application, the sleeve 103 is a steel round tube with a threaded inner wall, which is screwed and locked to the threaded section at the end of the main rib 101 or the structural rib 102.

[0034] In the embodiments of this application, the longitudinal segment is cut at the annular closed node of the main reinforcement 101, and a sleeve 103 is provided at the end of the segment. The axis of the sleeve 103 is parallel to the tunnel axis, and adjacent segments are connected and welded together by inserting the sleeve 103.

[0035] In the embodiments of this application, the cutting position of the transverse segment is located at the intersection node of the main reinforcement 101 of the tunnel cross section. A sleeve 103 is provided at the edge of the segment, and the axis of the sleeve 103 is perpendicular to the tunnel axis. Adjacent segments are inserted and welded together through the sleeve 103.

[0036] In the embodiments of this application, the main reinforcement 101 is a Φ20-Φ32mm threaded steel bar, arranged in a closed ring along the inner wall of the tunnel with a spacing of 200-300mm and an error of ≤5mm; the structural reinforcement 102 includes horizontal stirrups and longitudinal connecting bars, which are welded perpendicularly to the main reinforcement to form a grid skeleton.

[0037] In the embodiments of this application, the steel cage structure also includes a jack 301 robotic arm fixing hole structure, which is adapted to the mechanized construction of possible supporting machinery. The fixing hole structure includes a steel plate 201 vertically welded to the surface of the main reinforcement 101, a channel steel 202 welded to the steel plate 201 with its axis perpendicular to the tunnel axis, and a fixing hole 203 opened on the web of the channel steel 202 with a diameter adapted to the size of the robotic arm gripper.

[0038] In the embodiments of this application, the fixing hole structure is arranged at intervals of 1.5-2m on the surface of the module unit, with 3-5 sets in each module unit, and the position is adapted to the gripping path of the robotic arm.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A modular tunnel secondary lining reinforcement cage structure, characterized in that, The steel cage is composed of multiple interconnected modular units; The module unit is divided into longitudinal segments and transverse sections. The longitudinal segments are cut into lengths of 4-6m along the tunnel axis, and the transverse sections are cut into 3-5 pieces along the tunnel cross-section. Each module unit includes main reinforcement (101), structural reinforcement (102) and embedded sleeve (103). Adjacent module units are directly connected to the main reinforcement (101) or structural reinforcement (102) through sleeves (103) to form a continuous stress structure.

2. The steel cage structure according to claim 1, characterized in that, The sleeve (103) is welded to the end of the main reinforcement (101) or the structural reinforcement (102). The inner diameter of the sleeve matches the outer diameter of the main reinforcement or the structural reinforcement, and is fixed by interference fit or threaded connection.

3. The steel cage structure according to claim 2, characterized in that, The sleeve (103) is a steel round tube with a threaded inner wall, which is screwed and locked to the threaded section at the end of the main reinforcement (101) or the structural reinforcement (102).

4. The steel cage structure according to claim 3, characterized in that, The longitudinal segment is cut at the annular closed node of the main reinforcement (101), and a sleeve (103) is provided at the end of the segment. The axis of the sleeve (103) is parallel to the tunnel axis, and adjacent segments are fixed by inserting the sleeve (103).

5. The steel cage structure according to claim 1, characterized in that, The cutting position of the transverse segment is located at the intersection of the main reinforcement (101) of the tunnel cross section. A sleeve (103) is set at the edge of the segment. The axis of the sleeve (103) is perpendicular to the tunnel axis. Adjacent segments are fixed by inserting the sleeve (103).

6. The steel cage structure according to claim 1, characterized in that, The main reinforcement (101) is Φ20-Φ32mm threaded steel, arranged in a closed ring along the inner wall of the tunnel with a spacing of 200-300mm and an error of ≤5mm; the structural reinforcement (102) includes horizontal stirrups and longitudinal connecting bars, which are welded perpendicularly to the main reinforcement to form a grid skeleton.

7. The steel cage structure according to claim 1, characterized in that, It also includes a jack robotic arm fixing hole structure, the fixing hole structure comprising: Steel plate (201) is vertically welded to the surface of main reinforcement (101); Channel steel (202) is welded onto steel plate (201), and the axis of the channel steel is perpendicular to the tunnel axis; The fixing hole (203) is opened on the web of the channel steel (202), and the hole diameter is adapted to the size of the robotic arm gripper.

8. The steel cage structure according to claim 7, characterized in that, The fixing hole structure is arranged at intervals of 1.5-2m on the surface of the module unit, with 3-5 sets in each module unit, and the position is adapted to the grasping path of the robotic arm.

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