Installation structure and filling method of assembled foam concrete pipe

Abstract

The present invention discloses an installation structure and filling method for an assembled foam concrete pipe. By arranging arch supports and partition bars, the construction difficulty is reduced, the construction efficiency is improved, and the quality requirements of the buffer layer construction in the anti-slip design of the tunnel can be flexibly met. The technical solution includes two installation units. The installation unit includes a first arch frame, a partition bar and a second arch frame. The first arch frame is arranged on a side close to the initial support, and the second arch frame is arranged on a side close to the secondary lining. The partition bar is arranged between the first arch frame and the second arch frame. The radius of the first arch frame is larger than the radius of the second arch frame. The partition bar and the first arch frame can move relative to each other, and the partition bar and the second arch frame can also move relative to each other.

Description

Technical Field

[0001] The present invention belongs to the technical field of tunnel construction, and in particular relates to an installation structure and a filling method of an assembled foam concrete pipe. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] As essential transportation infrastructure, tunnel projects face increasingly significant geological challenges in modern urban transportation and cross-regional connectivity, inevitably crossing active fault zones. Existing technologies employ a buffer layer between the primary tunnel support and the secondary lining within the fault zone, typically made of flexible materials. Given on-site construction and maintenance requirements, some tunnel buffer layers are currently constructed using prefabricated components, such as porous precast concrete elements or prefabricated foam concrete pipes.

[0004] Existing prefabricated foam concrete pipes are installed using bolts, which require high installation precision and are prone to structural dislocation and uneven force, leading to cracks or damage on the pipe surface. The installation process is cumbersome and time-consuming, and it is difficult to flexibly adjust, which makes the assembly of foam concrete pipes more difficult. The bolt material is more prone to rust in areas with high humidity and abundant groundwater, and the reliability of the bolt structure is difficult to ensure. At the same time, the bolt and the prefabricated foam concrete pipe are connected at points, which makes it easy for the unsupported parts between the pipes to move freely or offset, making it difficult to maintain an orderly and stable overall arrangement. Summary of the Invention

[0005] In response to the above problems, the present invention provides an installation structure and filling method for prefabricated foam concrete pipes. By setting arch supports and partition bars, the construction difficulty is reduced, the construction efficiency is improved, and the buffer layer construction quality requirements in the tunnel anti-fracture design can be flexibly met.

[0006] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0007] In the first aspect, the present invention provides an installation structure for prefabricated foam concrete pipes, comprising two installation units; the installation unit comprises a first arch frame, partition ribs and a second arch frame; the installation structure is located in a buffer layer between the primary support and the secondary lining; the first arch frame is arranged on a side close to the primary support, and the second arch frame is arranged on a side close to the secondary lining; the partition ribs are arranged between the first arch frame and the second arch frame; the radius of the first arch frame is greater than the radius of the second arch frame; the partition ribs and the first arch frame can move relative to each other, and the partition ribs and the second arch frame can also move relative to each other; the partition ribs and the first arch frame and the second arch frame together constitute a filling frame; the filling frame is used to place prefabricated foam concrete pipes.

[0008] Furthermore, the installation structure is continuously arranged along the longitudinal direction of the buffer layer, and is composed of two installation units spaced a set distance apart along the longitudinal direction of the tunnel, and a plurality of installation structures are provided.

[0009] Furthermore, the length of the intervals between the installation units is smaller than the length of the assembled foam concrete pipe.

[0010] Furthermore, the installation unit is provided with a plurality of partition ribs between the first arch frame and the second arch frame, so that the partition ribs, the first arch frame and the second arch frame together form a plurality of filling frames.

[0011] Furthermore, the curvature of the first arch frame fits the initial support surface; the material of the first arch frame is an aluminum alloy tube; the wall thickness and outer diameter of the aluminum alloy tube are both selected from set sizes.

[0012] Furthermore, the curvature of the second arch frame fits the surface of the secondary lining; the material of the second arch frame is an aluminum alloy tube; the wall thickness and outer diameter of the aluminum alloy tube are also selected to be set sizes.

[0013] Furthermore, the partition rib is made of fiberglass; the diameter of the partition rib is selected to be a set size; the length of the partition rib is equal to the spacing between the first arch frame and the second arch frame; and C-shaped fixing structures are installed at both ends of the partition rib.

[0014] Furthermore, the C-shaped fixing structure is composed of a C-shaped hoop and a fastener; the material of the C-shaped hoop is consistent with the material of the partition reinforcement.

[0015] Furthermore, the fastener is arranged at the opening of the C-shaped hoop, and the fastener is a half-thread bolt and a nut.

[0016] In a second aspect, the present invention further provides a method for filling an installation structure of an assembled foam concrete pipe, comprising:

[0017] Arrange the foam concrete pipes along the edge of the arc-shaped quadrilateral frame in the order of rows and columns so that the pipes are distributed in a matrix;

[0018] Alternatively, the foam concrete tubes are closely arranged in a honeycomb pattern, which is suitable for use in curved quadrilateral frames that require high packing density.

[0019] Compared with the prior art, the present invention has the following advantages and positive effects:

[0020] The arched bracket and partition reinforcement of the present invention can be installed in the prefabrication site or on-site, realizing the quick installation of the assembled foam concrete pipe, avoiding the complicated operation process of the traditional bolt rod fixing method, thereby greatly improving the construction efficiency and reducing the construction difficulty; the partition reinforcement structure has the function of disassembly and adjustment, and by adjusting the filling frame size and filling method, local reinforcement design can be implemented for key parts, which can more flexibly adapt to the anti-fracture requirements under complex geological conditions; compared with the traditional installation method, the design of the partition reinforcement makes the arrangement of the assembled foam concrete pipe more stable.

[0021] The arch support and partition reinforcement materials of the present invention are both corrosion-resistant materials, which can effectively enhance the durability and service life of the tunnel buffer layer in extreme environments and meet the long-term protection needs of tunnel projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0023] Figure 1 is a schematic diagram of the installation structure of the present invention;

[0024] Figure 2 A cross-sectional view of a tunnel provided with the mounting structure of the present invention;

[0025] Figure 3 This is a structural diagram of the partition reinforcement of the present invention;

[0026] Figure 4 This is a schematic diagram of the foam concrete tubes of the present invention arranged in a matrix form;

[0027] Figure 5 This is a schematic diagram of the honeycomb arrangement of the foam concrete tubes of the present invention.

[0028] In the figure: 1. First arch frame; 2. Partition reinforcement; 3. Second arch frame; 4. Foam concrete pipe; 5. Primary support; 6. Secondary lining; 7. Crushing zone; 8. C-shaped hoop; 9. Fastener. DETAILED DESCRIPTION

[0029] It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meaning as commonly understood by those skilled in the art to which the present invention belongs.

[0030] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise clearly indicated in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "comprising" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations;

[0031] This embodiment discloses an installation structure of an assembled foam concrete pipe, such as Figure 1-Figure 3 As shown, the installation structure is located in the buffer layer between the initial support 5 and the secondary lining 6; the installation structure consists of two installation units; the installation unit includes a first arch frame 1, a partition rib 2 and a second arch frame 3; the first arch frame 1 is arranged on the side close to the initial support 5, and the second arch frame 3 is arranged on the side close to the secondary lining 6; the partition rib 2 is arranged between the first arch frame 1 and the second arch frame 3; the radius of the first arch frame 1 is larger than the radius of the second arch frame 3; the partition rib 2 and the first arch frame 1 can move relative to each other, and the partition rib 2 and the second arch frame 3 can also move relative to each other; the partition rib and the first arch frame and the second arch frame together form a filling frame; the filling frame is used to place assembled foam concrete pipes.

[0032] Each installation unit is provided with a plurality of partition bars 2; the partition bars 2 and the first arch frame 1 and the second arch frame 3 together form a plurality of filling frames, the size of the filling frames being set according to actual conditions; the filling frames can carry the assembled foam concrete pipes 4 in an orderly manner.

[0033] In this embodiment, the mounting structure is similar in shape to the steel arch of the primary support 5, but its primary function is not to bear the surrounding rock pressure, but to support the deadweight of the prefabricated foam concrete tubes 4. To ensure that the prefabricated foam concrete tubes 4 can effectively activate their seismic buffering effect when the crushing zone 7 shifts, the design of the partition bars 2 focuses on flexibility and corrosion resistance to avoid stress concentration caused by excessive strength.

[0034] Specifically, the mounting structures are continuously arranged along the longitudinal direction of the buffer layer, and are composed of two mounting units spaced a set distance apart along the longitudinal direction of the tunnel, and a plurality of mounting structures are provided.

[0035] Specifically, the length of the intervals between the installation units is less than the length of each section of the assembled foam concrete pipe. Generally, the length of the intervals between the installation units is 0.8 times the length of the assembled foam concrete pipe 4 .

[0036] Specifically, the curvature of the first arch frame 1 is in contact with the surface of the initial support 5 ; the material of the first arch frame 1 is an aluminum alloy tube; the wall thickness and outer diameter of the aluminum alloy tube are both selected from set sizes.

[0037] The curvature of the second arch 3 aligns with the surface of the secondary lining 6 ; the second arch 3 is made of an aluminum alloy tube, and the wall thickness and outer diameter of the aluminum alloy tube are also selected to predetermined dimensions. Both the first arch 1 and the second arch 3 in the present invention utilize lightweight, high-strength, and corrosion-resistant aluminum alloy tubes to ensure the long-term durability and service life of the buffer layer in extreme environments.

[0038] The partition rib 2 is made of fiberglass; the diameter of the partition rib 2 is selected to a set size; the length of the partition rib 2 is equal to the distance between the first arch frame 1 and the second arch frame 3; and C-shaped fixing structures are installed at both ends of the partition rib 2.

[0039] Specifically, the C-shaped fixing structures at both ends of the partition bar 2 enable detachable installation of the partition bar 2 on the arch support. The C-shaped fixing structure is composed of a C-shaped hoop 8 and a fastener 9. To facilitate manufacturing and ensure material compatibility, the C-shaped hoop 8 is made of the same material as the partition bar 2. The fastener 9 is set at the bottom of the hoop and uses a half-thread bolt and nut. The clamping force of the C-shaped hoop 8 is adjusted by tightening the bolts, thereby enabling the partition bar 2 to slide or lock on the arch support, ensuring flexibility and operational stability during installation.

[0040] In order to meet the requirements of anti-fracture under complex geological conditions, the filling method can be flexibly selected and local reinforcement treatment can be performed on key parts. Therefore, there are two filling methods for the above-mentioned assembled foam concrete pipe 4:

[0041] like Figure 4 As shown, the foam concrete pipes 4 are arranged in rows and columns along the edges of the arc-shaped quadrilateral frame, so that the pipes are distributed in a matrix pattern. The space utilization rate is 78.5%, which is suitable for areas with medium filling density requirements and facilitates the unified layout and maintenance of the pipes.

[0042] or, as Figure 5 As shown, the foam concrete tubes 4 are closely arranged in a honeycomb pattern, which is suitable for arc-shaped quadrilateral frames that require high filling density. The space utilization rate is 90.7%, which can more effectively improve the overall anti-fracture performance of the buffer layer and is particularly suitable for local strengthening treatment.

[0043] Although the above describes the specific embodiments of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without any creative work are still within the scope of protection of the present invention.

Claims

1. An installation structure for assembled foam concrete pipes, characterized in that: include: Two installation units; the installation unit includes a first arch frame, a partition rib, and a second arch frame; the installation structure is located in the buffer layer between the primary support and the secondary lining; the first arch frame is arranged on the side close to the primary support, and the second arch frame is arranged on the side close to the secondary lining; the partition rib is arranged between the first arch frame and the second arch frame; the radius of the first arch frame is larger than the radius of the second arch frame; the partition rib and the first arch frame can move relative to each other, and the partition rib and the second arch frame can also move relative to each other; the partition rib, the first arch frame, and the second arch frame together form a filling frame; the filling frame is used to place prefabricated foam concrete pipes; The mounting structure is continuously arranged along the longitudinal direction of the buffer layer, and is composed of two mounting units spaced a set distance apart along the longitudinal direction of the tunnel, and a plurality of mounting structures are provided; the mounting units are provided with a plurality of partition ribs between the first arch frame and the second arch frame, so that the partition ribs and the first arch frame and the second arch frame together form a plurality of filling frames.

2. The installation structure of an assembled foam concrete pipe according to claim 1, characterized in that: The length of the intervals between the installation units is smaller than the length of the assembled foam concrete pipe.

3. The installation structure of an assembled foam concrete pipe according to claim 1, characterized in that: The curvature of the first arch frame fits the initial support surface; the material of the first arch frame is an aluminum alloy tube; the wall thickness and outer diameter of the aluminum alloy tube are both selected from set sizes.

4. The installation structure of an assembled foam concrete pipe according to claim 1, characterized in that: The curvature of the second arch frame fits the surface of the secondary lining; the material of the second arch frame is an aluminum alloy tube; the wall thickness and outer diameter of the aluminum alloy tube are also selected from set sizes.

5. The installation structure of an assembled foam concrete pipe according to claim 1, characterized in that: The material of the partition bar is glass fiber reinforced plastic; the diameter of the partition bar is selected to be a set size; the length of the partition bar is equal to the distance between the first arch frame and the second arch frame; and C-shaped fixing structures are respectively installed at both ends of the partition bar.

6. The installation structure of an assembled foam concrete pipe according to claim 5, characterized in that: The C-shaped fixing structure is composed of a C-shaped hoop and a fastener; the material of the C-shaped hoop is consistent with the material of the partition reinforcement.

7. The installation structure of an assembled foam concrete pipe according to claim 6, characterized in that: The fastener is arranged at the opening of the C-shaped hoop, and the fastener is a half-thread bolt and a nut.

8. A filling method for an assembled foam concrete pipe installation structure according to any one of claims 1 to 7, characterized in that: include: Arrange the foam concrete pipes along the edge of the arc-shaped quadrilateral frame in the order of rows and columns so that the pipes are distributed in a matrix; Alternatively, the foam concrete tubes are closely arranged in a honeycomb pattern, which is suitable for use in curved quadrilateral frames that require high packing density.

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