Duct piece supporting device for large shield tunnel connection channel opening

Abstract

The utility model belongs to the technical field of shield tunnel construction, and discloses a large shield tunnel connection channel opening duct piece supporting device which comprises supporting cross beams, supporting stand columns and connecting pieces, the two supporting cross beams are arranged in a spaced mode in the first direction, and the two supporting stand columns are arranged in a spaced mode in the second direction. The supporting stand columns are arranged in an arc shape, the radian of the supporting stand columns is matched with that of the steel pipe piece, the two supporting stand columns are located between the two supporting cross beams, the two ends of each supporting stand column are connected to the two supporting cross beams respectively to form an inner cavity matched with the opening, and the two supporting cross beams and the two supporting stand columns are connected to the inner wall of the steel pipe piece along the edge of the opening. According to the duct piece supporting device for the large shield tunnel connecting channel opening, the two supporting cross beams and the two supporting stand columns are arranged to be connected to the inner wall of the steel pipe piece along the edge of the opening, the strength of the steel pipe piece at the opening position is enhanced, and the connecting channel construction risk is reduced.

Description

Technical Field

[0001] This utility model relates to the field of shield tunnel construction technology, and in particular to a segment support device for the entrance of a large shield tunnel connecting passage. Background Technology

[0002] Existing shield tunnels typically use multiple steel segments at the location of pedestrian connecting passages, and small K-blocks are placed at the rectangular openings to facilitate the removal of the openings before excavation. Before removing the K-blocks, the joints of the remaining steel segments (excluding the K-blocks) need to be firmly welded together. However, the steel segments at the openings are relatively weak and prone to deformation, posing risks during the construction of the connecting passages.

[0003] Therefore, there is an urgent need to design a segment support device for the entrance of a large shield tunnel connecting passage to improve the above problems. Utility Model Content

[0004] The purpose of this utility model is to provide a segment support device for the opening of a large shield tunnel connecting passage, so as to solve the technical problem that the steel segments at the opening position are relatively weak and prone to deformation, which leads to risks in the construction process of the connecting passage.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] The segment support device for the entrance of the connecting passage of a large shield tunnel provided by this utility model includes:

[0007] The support beams are provided in two form, and the two support beams are spaced apart along a first direction.

[0008] The support column is provided in two parts, which are spaced apart along a second direction perpendicular to the first direction. The support column is arc-shaped and the arc matches the arc of the steel pipe segment. The two support columns are located between two support beams. The two ends of the support column are respectively connected to the two support beams to form an inner cavity that matches the opening. The two support beams and the two support columns are connected to the inner wall of the steel pipe segment along the edge of the opening.

[0009] The connecting components are provided between the supporting crossbeam and the steel pipe segment, and between the supporting column and the steel pipe segment.

[0010] As a preferred embodiment of the segment support device at the entrance of a large shield tunnel connecting passage, the connector includes:

[0011] The first rib is provided in multiple forms, which are spaced apart along the second direction. One end of each first rib is connected to the side of the support beam away from the inner cavity. The first rib is connected to the steel tube segment.

[0012] The second rib is provided in multiple forms, which are spaced apart along the length of the support column. One end of each second rib is connected to the side of the support column away from the inner cavity, and the second rib is connected to the steel pipe segment.

[0013] As a preferred embodiment of the segment support device at the entrance of the connecting passage of a large shield tunnel, both the first rib and the second rib are triangular steel plates and / or right-angled trapezoidal steel plates.

[0014] As a preferred embodiment of the segment support device for the tunnel connecting passage of a large shield tunnel, the right-angled sides of the first rib are welded to the supporting beam and the steel segment respectively.

[0015] The right-angled sides of the second rib are welded to the supporting column and the steel pipe segment, respectively.

[0016] As a preferred embodiment of the segment support device at the entrance of a large shield tunnel connecting passage, the support beam is equipped with lifting components for easy hoisting.

[0017] As a preferred embodiment of the segment support device for the tunnel portal of a large shield tunnel connecting passage, the hoisting components include:

[0018] Lifting lugs are provided on each of the supporting crossbeams, with at least two lifting lugs provided on the top of the supporting crossbeams and the two lifting lugs located at the two ends of the supporting crossbeams respectively.

[0019] As a preferred embodiment of the segment support device at the entrance of a large shield tunnel connecting passage, both the supporting beam and the supporting column are H-beams.

[0020] As a preferred embodiment of the segment support device at the entrance of a large shield tunnel connecting passage, the supporting beam is welded to the supporting column, and the supporting beam and the supporting column are welded to the inner wall of the steel segment.

[0021] As a preferred embodiment of the segment support device at the entrance of a large shield tunnel connecting passage, the size of the inner cavity is greater than or equal to the size of the opening.

[0022] The beneficial effects of this utility model are:

[0023] By setting up two supporting beams and two supporting columns to form an inner cavity that matches the opening, and connecting the two supporting beams and two supporting columns along the edge of the opening to the inner wall of the steel pipe segment, the strength of the steel pipe segment at the opening position is strengthened, reducing the cracking and leakage caused by deformation of the steel pipe segment around the opening. The overall strength is higher, ensuring the safety of construction personnel and reducing the construction risk of the connecting passage. Attached Figure Description

[0024] Figure 1 This is a front view of the segment support device at the entrance of the large shield tunnel connecting passage provided by this utility model;

[0025] Figure 2 This is a cross-sectional view of the segment support device for the large shield tunnel connecting passage provided by this utility model installed on the steel segment.

[0026] Figure 3 This is a longitudinal section view of the segment support device for the large shield tunnel connecting passage provided by this utility model, installed on the steel segment.

[0027] In the picture:

[0028] 1. Support beam; 11. First rib;

[0029] 2. Supporting column; 21. Second rib;

[0030] 3. Lifting ear plates. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0032] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" 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 utility model based on the specific circumstances.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0035] Existing shield tunnels typically use multiple steel segments at the location of pedestrian connecting passages, and small K-blocks are placed at the rectangular openings to facilitate the removal of the openings before excavation. Before removing the K-blocks, the joints of the remaining steel segments (excluding the K-blocks) need to be firmly welded together. However, the steel segments at the openings are relatively weak and prone to deformation, posing risks during the construction of the connecting passages.

[0036] To solve the above problems, combined with Figures 1-3 As shown in the figure, this embodiment provides a segment support device for the entrance of a large shield tunnel connecting passage, including a support beam 1, a support column 2, and connectors.

[0037] like Figure 1 As shown, in this embodiment, two support beams 1 are provided, spaced apart along a first direction. Two support columns 2 are provided, spaced apart along a second direction, which is perpendicular to the first direction. That is, the two support beams 1 are arranged vertically, and the two support columns 2 are arranged horizontally.

[0038] Among them, the support column 2 is arc-shaped and the curvature matches the curvature of the steel pipe segment, ensuring that the support column 2 can fit tightly with the inner arc surface of the steel pipe segment, increasing the connection surface between the support column 2 and the steel pipe segment, and ensuring good connection firmness.

[0039] Two supporting columns 2 are located between two supporting beams 1. The two ends of each supporting column 2 are connected to the two supporting beams 1 to form an inner cavity that matches the opening. The two supporting beams 1 and the two supporting columns 2 are connected to the inner wall of the steel pipe segment along the edge of the opening. By setting two supporting beams 1 and two supporting columns 2 to form an inner cavity that matches the opening, the size of the inner cavity is greater than or equal to the size of the opening. In this embodiment, the size of the inner cavity is greater than the size of the opening, thus dispersing the supporting force of the supporting beams 1 and supporting columns 2 on the edge of the opening to the surrounding area, resulting in better support stability. Connecting the two supporting beams 1 and two supporting columns 2 to the inner wall of the steel pipe segment along the edge of the opening strengthens the steel pipe segment at the opening location, reducing cracking and leakage caused by deformation of the steel pipe segment around the opening. This results in higher overall strength, ensuring the safety of construction personnel and reducing the construction risks of the connecting passage.

[0040] Preferably, both the supporting beam 1 and the supporting column 2 are H-beams. H-beams have excellent bending and compressive strength, and can adapt to the horizontal and vertical spacing of openings with large spans. As they are relatively conventional materials, their manufacturing costs are also low, making them economical.

[0041] Furthermore, the supporting beam 1 is welded to the supporting column 2, and the supporting beam 1 and the supporting column 2 are welded to the inner wall of the steel pipe segment.

[0042] like Figure 1 As shown, connectors are provided between the supporting beam 1 and the steel pipe segment, and between the supporting column 2 and the steel pipe segment. These connectors enhance the connection strength between the supporting beam 1 and the steel pipe segment, and between the supporting column 2 and the steel pipe segment, resulting in a secure connection.

[0043] Specifically, the connector includes a first rib 11 and a second rib 21, such as Figure 1 and Figure 3 As shown, multiple first ribs 11 are provided, spaced apart along the second direction. One end of each first rib 11 is connected to the side of the supporting beam 1 away from the inner cavity, and the first ribs 11 are connected to the steel pipe segments. In this embodiment, ten first ribs 11 are provided. In other embodiments, the spacing between adjacent first ribs 11 can be equal or unequal, and the number of first ribs 11 can be six, seven, eight, nine, eleven, or even more. This embodiment does not specifically limit the spacing and number of adjacent first ribs 11. Preferably, the first rib 11 is a triangular steel plate.

[0044] like Figure 1 and Figure 2As shown, multiple second ribs 21 are provided, spaced apart along the length of the supporting column 2. One end of each second rib 21 is connected to the side of the supporting column 2 away from the inner cavity, and the second ribs 21 are connected to the steel pipe segments. In this embodiment, seven second ribs 21 are provided. In other embodiments, the spacing between adjacent second ribs 21 may be equal or unequal, and the number of second ribs 21 may be six, eight, nine, ten, or even more. This embodiment does not specifically limit the spacing and number of adjacent first ribs 11. Preferably, the second rib 21 is a right-angled trapezoidal steel plate.

[0045] Furthermore, the right-angled sides of the first rib plate 11 are welded to the supporting beam 1 and the steel pipe segment respectively, and the right-angled sides of the second rib plate 21 are welded to the supporting column 2 and the steel pipe segment respectively.

[0046] To facilitate the installation of the segment support device at the entrance of the connecting passage of the large shield tunnel, the segment support device is prefabricated and then hoisted for installation. Therefore, the support beam 1 is equipped with hoisting components for easy hoisting. Specifically, the hoisting components include hoisting lugs 3. Each support beam 1 is equipped with at least two hoisting lugs 3. The hoisting lugs 3 are located at the top of the support beam 1, and the two hoisting lugs 3 are located at both ends of the support beam 1.

[0047] For example, taking a steel pipe segment with ten segments and an opening size of 1.8m*2.5m as an example, a support beam 1 and a support column 2 with HW250mmx250mm are used. The size of the first rib plate 11 and the second rib plate 21 is 220mm*220mm. The first rib plate 11 is connected to the support beam 1 by an 8mm weld, and the second rib plate 21 is connected to the support column 2 by an 8mm weld. The radius of the support column 2 is 6.65m, and the thickness of the lifting ear plate 3 is 20mm.

[0048] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A segment support device for the entrance of a connecting passage in a large shield tunnel, characterized in that, include: Support beam (1), two support beams (1) are provided, and the two support beams (1) are spaced apart along a first direction; Supporting columns (2), two supporting columns (2) are provided, the two supporting columns (2) are spaced apart along a second direction, the second direction is perpendicular to the first direction, the supporting columns (2) are arc-shaped and the arc matches the arc of the steel pipe segment, the two supporting columns (2) are located between two supporting beams (1), the two ends of the supporting columns (2) are respectively connected to the two supporting beams (1) to form an inner cavity that matches the opening, the two supporting beams (1) and the two supporting columns (2) are connected to the inner wall of the steel pipe segment along the edge of the opening; The connecting parts are provided between the supporting beam (1) and the steel pipe segment, and between the supporting column (2) and the steel pipe segment.

2. The segment support device for the entrance of a large shield tunnel connecting passage according to claim 1, characterized in that, The connector includes: First rib (11), multiple first ribs (11) are provided, multiple first ribs (11) are spaced apart along the second direction, one end of multiple first ribs (11) is connected to the other side of the support beam (1) away from the inner cavity, and the first ribs (11) are connected to the steel pipe segment. The second rib (21) is provided in multiple forms. The multiple second ribs (21) are spaced apart along the length direction of the support column (2). One end of the multiple second ribs (21) is connected to the other side of the support column (2) away from the inner cavity. The second ribs (21) are connected to the steel pipe segment.

3. The segment support device for the entrance of a large shield tunnel connecting passage according to claim 2, characterized in that, The first rib (11) and the second rib (21) are both triangular steel plates and / or right-angled trapezoidal steel plates.

4. The segment support device for the entrance of a large shield tunnel connecting passage according to claim 3, characterized in that, The right-angled sides of the first rib (11) are welded to the supporting crossbeam (1) and the steel pipe segment respectively; The right-angled sides of the second rib (21) are welded to the supporting column (2) and the steel pipe segment respectively.

5. The segment support device for the entrance of a large shield tunnel connecting passage according to claim 1, characterized in that, The supporting beam (1) is provided with lifting components for easy hoisting.

6. The segment support device for the entrance of a large shield tunnel connecting passage according to claim 5, characterized in that, The lifting components include: Lifting lugs (3), at least two lifting lugs (3) are provided on each of the supporting beams (1), the lifting lugs (3) are provided at the top of the supporting beams (1), and the two lifting lugs (3) are respectively located at both ends of the supporting beams (1).

7. The segment support device for the entrance of a large shield tunnel connecting passage according to claim 1, characterized in that, Both the supporting beam (1) and the supporting column (2) are H-beams.

8. The segment support device for the entrance of a large shield tunnel connecting passage according to claim 7, characterized in that, The supporting beam (1) is welded to the supporting column (2), and the supporting beam (1) and the supporting column (2) are welded to the inner wall of the steel pipe segment.

9. The segment support device for the entrance of a large shield tunnel connecting passage according to any one of claims 1-8, characterized in that, The size of the inner cavity is greater than or equal to the size of the opening.

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