A device for testing the performance of self-compacting concrete in a tunnel lining steel pipe

Abstract

The application relates to a tunnel lining steel pipe self-compacting concrete performance testing device, which comprises a square box, a partition plate, a cover plate and a pressing plate. The partition plates are arranged at intervals in the square box, and the interval of the partition plates is consistent with the interval of the outer wall reinforcing rings of the lining steel pipe. The square box and the partition plates are arranged in proportion to the mechanism size of the tunnel lining steel pipe. The upper portion of the square box is provided with the cover plate, the cover plate is provided with a discharging hole at one end of the square box, the upper portion of the cover plate is provided with the pressing plate at intervals, and the cover plate is made of transparent material and is arranged in blocks. The testing device simulates the tunnel lining steel pipe self-compacting concrete pouring condition, adopts the proportionally scaled mold and the glass cover plate, can directly observe the flow state of the concrete in the simulation self-compacting concrete pouring process, and effectively tests the compactness and uniformity of the self-compacting concrete after pouring. The structure is simple, practical and convenient to use and popularize.

Description

Technical Field

[0001] This application relates to the field of water conservancy engineering construction technology, and in particular to a device for testing the performance of self-compacting concrete in tunnel lining steel pipes. Background Technology

[0002] In the water conservancy industry, secondary lining is required after the excavation and support of water conveyance tunnels are completed. The use of steel pipes as inner lining structures is becoming increasingly common. The space between the inner steel pipe and the initial support is filled with concrete. Due to the sealing characteristics of the steel pipe, the concrete cannot be vibrated during the pouring process. Whether the concrete is poured densely and evenly depends mainly on the performance of the concrete. Therefore, self-compacting concrete is generally used for inner steel pipe lining. Before construction, it is essential to test the fluidity and density of the self-compacting concrete.

[0003] The tunnel lining steel pipe consists of the steel pipe itself, external stiffening rings, and pouring holes. The external stiffening rings impede concrete flow, and the spacing between the pouring holes is generally greater than 5 meters, which places higher demands on the performance of the self-compacting concrete. Before the construction of self-compacting concrete, simulating the pouring conditions and evaluating whether the performance of the self-compacting concrete meets the requirements is an essential technical task that requires specialized testing equipment to meet the evaluation needs. Utility Model Content

[0004] To address or partially address the problems existing in related technologies, this application provides a test device for the performance of self-compacting concrete in tunnel lining steel pipes. This device simulates the pouring thickness, material spacing, and the presence of stiffening rings of the self-compacting concrete in the lining steel pipes, and clearly and intuitively tests the performance of the self-compacting concrete.

[0005] The first aspect of this application provides a test device for the performance of self-compacting concrete of tunnel lining steel pipe, comprising: a square box, a partition plate, a cover plate, and a pressure plate. The partition plates are spaced apart inside the square box, and the spacing between the partition plates is consistent with the spacing between the stiffening rings on the outer wall of the lining steel pipe. The square box and the partition plates are set proportionally based on the structural dimensions of the tunnel lining steel pipe. A cover plate is provided on the upper part of the square box, and a material hole is pre-drilled at one end of the cover plate. Pressure plates are spaced apart on the upper part of the cover plate. The cover plate is made of transparent material and is set in sections.

[0006] The square box and the middle partition are both made of wooden templates.

[0007] The ratio of the height of the square box to the thickness of the concrete pouring of the inner steel pipe in the tunnel is 1:2, and the length is greater than the spacing between the concrete pouring holes of the inner steel pipe.

[0008] The ratio of the height of the central diaphragm to the height of the stiffening ring on the outer wall of the inner steel pipe is 1:2.

[0009] The technical solution provided in this application may include the following beneficial effects: This application provides a test device for the performance of self-compacting concrete in tunnel lining steel pipes. By simulating the pouring conditions of self-compacting concrete in tunnel lining steel pipes, a mold and glass cover are made by proportional scaling. During the simulated self-compacting concrete pouring process, the flow state of the concrete can be directly observed, and the compactness and uniformity of the self-compacting concrete after pouring can be effectively tested. The structure is simple, practical and easy to promote and use.

[0010] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0011] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0012] Figure 1 This is a schematic diagram of the structure of the tunnel lining steel pipe self-compacting concrete performance testing device shown in the embodiments of this application; Figure 2 This is a front structural schematic diagram of the test device for the performance of self-compacting concrete with steel pipe lining in tunnels, as shown in the embodiments of this application. Figure 3 This is a side view of the performance testing device for self-compacting concrete with steel pipe lining in tunnels, as shown in an embodiment of this application.

[0013] Figure label: In the diagram, 1-square box, 2-middle partition, 3-cover plate, 4-pressure plate. Detailed Implementation

[0014] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this application more thorough and complete, and to fully convey the scope of this application to those skilled in the art.

[0015] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0016] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0017] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0018] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0019] As shown in the figure, a test device for the performance of self-compacting concrete in tunnel lining steel pipes includes: a square box 1, a partition plate 2, a cover plate 3, and a pressure plate 4. The square box 1 contains partition plates 2 spaced apart, all made of wooden templates and scaled proportionally to the relevant structural dimensions of the tunnel lining steel pipe. The height of the square box 1 is in a 1:2 ratio to the concrete pouring thickness of the tunnel lining steel pipe, and its length is greater than the spacing between the concrete pouring holes of the lining steel pipe. The spacing of the partition plates 2 is consistent with the spacing of the stiffening rings on the outer wall of the lining steel pipe, and the height of the partition plates 2 is in a 1:2 ratio to the height of the stiffening rings on the outer wall of the lining steel pipe, with the spacing of the partition plates 2 matching the spacing of the stiffening rings.

[0020] A cover plate 3 is installed on the top of the square box 1. A discharge hole is left at one end of the square box 1, and the rest is fully covered. The cover plate 3 is made of glass and is set in sections. The flow state of the self-compacting concrete can be observed during the concrete pouring process. The joints also serve as venting points to facilitate the flow of concrete. Pressure plates 4 are set at intervals on the top of the cover plate 3 to prevent the cover plate 3 from floating when the concrete is poured.

[0021] Specifically, both the square box 1 and the partition plate 2 are made of 20mm thick wooden templates and scaled proportionally according to the relevant structural dimensions of the tunnel lining steel pipe. The square box 1 is 1m wide, 22.5cm high, and 6m long; the partition plates 2 are spaced 1.5m apart, with a total of 3 plates, and are 10cm high; steel wire is used to tie the square box 1 and the partition plate 2 to ensure overall stability.

[0022] Leave a 50cm long material feeding hole at one end of the square box 1, and cover the rest with 10mm thick glass cover plates 3. There are 4 cover plates 3 in total, and the seam position corresponds to the position of the middle partition plate 2.

[0023] Pressure plates 4 are spaced apart on the upper part of the cover plate 3. The pressure plates 4 are made of 3cm thick wooden boards, and two pressure plates 4 are set on the upper part of each glass cover plate 3.

[0024] Self-compacting concrete testing process: Place the device on the ground and wet it with water. The self-compacting concrete enters from the discharge hole left at one end of the square box 1. Through its own flow, it passes through the middle partition 2 and finally fills the entire square box 1. The flow state of the concrete can be directly observed during the process. After the concrete has set, the formwork is removed, and the air bubbles on the concrete surface are checked to evaluate the compactness of the self-compacting concrete.

[0025] Finally, it should be noted that in this document, relationships such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "include," "contain," or any other variations are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0026] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0027] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0028] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application.

[0029] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A device for testing the performance of self-compacting concrete lining steel pipes in tunnels, characterized in that, include: A square box (1), a partition plate (2), a cover plate (3) and a pressure plate (4) are provided. The partition plate (2) is set at intervals inside the square box (1), and the spacing of the partition plate (2) is consistent with the spacing of the stiffening ring on the outer wall of the inner steel pipe. The square box (1) and the partition plate (2) are set proportionally based on the structural dimensions of the inner steel pipe of the tunnel. The cover plate (3) is set on the upper part of the square box (1), and the cover plate (3) leaves a material hole at one end of the square box. The pressure plate (4) is set at intervals on the upper part of the cover plate (3). The cover plate (3) is made of transparent material and is set in sections.

2. The test device for the performance of self-compacting concrete in tunnel lining steel pipes according to claim 1, characterized in that, Both the square box (1) and the middle partition (2) are made of wooden templates.

3. The test device for the performance of self-compacting concrete in tunnel lining steel pipes according to claim 1, characterized in that, The height of the square box (1) is in a ratio of 1:2 to the thickness of the concrete pouring of the inner steel pipe of the tunnel, and its length is greater than the spacing between the concrete pouring holes of the inner steel pipe.

4. The test device for the performance of self-compacting concrete in tunnel lining steel pipes according to claim 1, characterized in that, The ratio of the height of the middle partition (2) to the height of the stiffening ring on the outer wall of the inner steel pipe is 1:2.

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