Shield interval tunnel portal post-pouring ring beam steel formwork
By introducing wedge-shaped grooves and connecting block structures into the ring beam steel formwork, the problem of formwork deformation under concrete pressure was solved, achieving stable forming and high-quality casting of the ring beam.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-15
- Publication Date
- 2026-03-20
AI Technical Summary
When installing the steel formwork for the ring beam, the outer and inner ring formwork are prone to deformation or breakage due to the pressure of the concrete, which affects the forming quality of the ring beam.
A wedge-shaped groove and connecting block structure was designed between the outer ring template and the inner ring template. The wedge groove limits the second connecting block to prevent the template from detaching and deforming under concrete pressure, and the template strength is improved by reinforcing ribs.
This effectively prevents the formwork from detaching and deforming under concrete pressure, ensuring the forming quality and condition of the ring beam.
Smart Images
Figure CN224017226U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of subway construction, specifically relates to a shield interval hole door post-pouring ring beam steel formwork. BACKGROUND
[0002] Steel formwork is a steel formwork for concrete pouring forming, and is widely used in construction engineering due to its multiple uses, concrete pouring forming and other characteristics. Meanwhile, the steel formwork has the advantages of reinforcing system, high component strength, large combined rigidity, high plate manufacturing precision, tight joint, difficulty in deformation, good formwork integrity, strong seismic resistance and the like. The hole door ring beam is an important structural connection and waterproof structure between the post-penetration station main structure and the shield segment, and is a decisive factor of the concrete pouring quality and appearance quality of the whole construction engineering quality standard.
[0003] When installing the ring beam steel formwork, the external ring formwork and the internal ring formwork thereon are generally fixed by bolts, but under the action of the concrete pressure during concrete pouring, deformation occurs between them, and even the connection therebetween is broken, thereby affecting the shape and quality of the ring beam forming.
[0004] Therefore, the utility model provides a shield interval hole door post-pouring ring beam steel formwork. UTILITY MODEL CONTENTS
[0005] In order to solve the problems in the prior art, the utility model provides a shield interval hole door post-pouring ring beam steel formwork.
[0006] The utility model discloses a shield interval hole door post-pouring ring beam steel formwork which comprises an external ring formwork, an internal ring formwork, an external ring feeding formwork, a station main structure and a shield segment.
[0007] The utility model discloses a shield interval hole door post-pouring ring beam steel formwork which comprises an external ring formwork, an internal ring formwork, an external ring feeding formwork, a station main structure and a shield segment.
[0008] Further, the outer ring template, the inner ring template and the outer ring feeding template are all in the shape of a sector, the outer ring template and the outer ring feeding template form the outer ring-shaped template of the ring beam, and the inner ring template forms the inner ring-shaped template of the ring beam.
[0009] Further, the outer ring template, the inner ring template and the outer ring feeding template are all in the shape of a sector, the outer ring template and the outer ring feeding template form the outer ring-shaped template of the ring beam, and the inner ring template forms the inner ring-shaped template of the ring beam.
[0010] Further, the outer ring template, the inner ring template and the outer ring feeding template are all in the shape of a sector, the outer ring template and the outer ring feeding template form the outer ring-shaped template of the ring beam, and the inner ring template forms the inner ring-shaped template of the ring beam.
[0011] Further, the outer ring template, the inner ring template and the outer ring feeding template are all in the shape of a sector, the outer ring template and the outer ring feeding template form the outer ring-shaped template of the ring beam, and the inner ring template forms the inner ring-shaped template of the ring beam.
[0012] Further, the outer ring template, the inner ring template and the outer ring feeding template are all in the shape of a sector, the outer ring template and the outer ring feeding template form the outer ring-shaped template of the ring beam, and the inner ring template forms the inner ring-shaped template of the ring beam.
[0013] The beneficial effects of the utility model are as follows:
[0014] The utility model discloses a groove and a wedge-shaped groove are formed in the inner ring template, when the outer ring template is installed, the outer ring template is clamped into the wedge-shaped groove, and therefore when concrete is poured, the wedge-shaped groove can limit the second connecting block, so that the outer ring-shaped template and the inner ring-shaped template are prevented from being separated and deformed due to pressure, and the subsequent state and quality of the ring beam are ensured. DRAWINGS
[0015] Figure 1 It is one of the utility model three -dimensional structure schematic diagram, and the outer ring template is installed on the outer ring of the ring beam.
[0016] Figure 2 It is the second of the utility model three -dimensional structure schematic diagram, and the inner ring template is installed on the inner ring of the ring beam.
[0017] Figure 3 It is the utility model cutaway view, and the outer ring template and the inner ring template are installed on the ring beam.
[0018] Figure 4 It is the inner ring template structure schematic diagram of the utility model.
[0019] Figure 5 It is the connecting ring structure schematic diagram of the utility model.
[0020] Sign significance: 1, outer ring template, 101, first bolt hole, 2, inner ring template, 201, second bolt hole, 202, flat groove, 203, wedge-shaped groove, 3, station main body structure, 4, shield segment, 5, connecting ring, 501, first connecting block, 502, second connecting block, 503, third bolt hole, 6, outer ring feeding template, 601, feeding groove, 602, sealing door plate, 7, connecting bolt. SPECIFIC IMPLEMENTATION
[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0023] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0024] In the description of the embodiments of this utility model, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.
[0025] like Figures 1-5As shown, a steel formwork for a post-cast ring beam of a shield tunnel portal includes an outer ring formwork 1, an inner ring formwork 2, an outer ring feeding formwork 6, a station main structure 3, and shield tunnel segments 4. The outer ring formwork 1 has first bolt holes 101 for connection to the station main structure 3, and the inner ring formwork 2 has second bolt holes 201 for connection to the shield tunnel segments 4. A flat groove 202 is formed on the outer ring formwork 1 on the same side as the outer ring feeding formwork 6, and wedge-shaped grooves 203 are formed on the other outer ring formwork 1s. A connecting ring 5 is provided on one side of the outer ring formwork 1 and the outer ring feeding formwork 6. A first connecting block 501 adapted to the flat groove 202 is provided on one side of the connecting ring 5 connected to the outer ring feeding formwork 6, and a second connecting block 502 adapted to the wedge-shaped groove 203 is provided on one side of the other connecting ring 5s. The first connecting block 501 and the outer ring feeding formwork... A third bolt hole 503 is provided on the connecting ring 5 on the same side as 6, and a connecting bolt 7 is provided in the internal thread of the third bolt hole 503. Specifically, when assembling the template, the inner ring template 2 is assembled first and connected to the shield segment 4 through the second bolt hole 201. Then, when assembling the outer ring template 1, the second connecting block 502 is inserted into the wedge groove 203 through the position of the flat groove 202. Finally, the first connecting block 501 is inserted into the flat groove 202. Then, the connecting bolt 7 is screwed into the third bolt hole 503 to achieve the connection of the outer ring template 1. Finally, it is connected to the station main structure 3 through the first bolt hole 101 to complete the installation of the template. After the template is installed, concrete can be poured into the template through the feeding trough 601.
[0026] like Figures 1-4 As shown, the outer ring template 1, inner ring template 2, and outer ring feeding template 6 are all fan-shaped. The outer ring template 1 and outer ring feeding template 6 form the outer ring template of the ring beam, and the inner ring template 2 forms the inner ring template of the ring beam. Specifically, during concrete pouring, a large pressure will be generated between the outer ring template and the inner ring template. However, since the wedge groove 203 can limit the second connecting block 502, it can prevent the outer ring template and the inner ring template from separating due to pressure, thus ensuring the subsequent state and quality of the ring beam.
[0027] like Figures 1-5 As shown, the outer ring template 1, the inner ring template 2, and the outer ring feeding template 6 are all equipped with multiple cross-combined reinforcing ribs inside; specifically, the reinforcing ribs can improve the strength of the outer ring template 1, the inner ring template 2, and the outer ring feeding template 6, and prevent them from undergoing large-scale deformation.
[0028] like Figure 3 As shown, a concrete pouring trough 601 is provided on the outer ring feeding template 6, and a sealing door plate 602 is provided at the position of the feeding trough 601.
[0029] like Figure 1 As shown, the sealing door panel 602 is provided with fixing bolts, which can be used to seal the feeding trough 601.
[0030] like Figures 1-4 As shown, the outer ring template 1 and the inner ring template 2 are set vertically.
[0031] In summary: When assembling the template, the inner ring template 2 is assembled first, and then connected to the shield tunnel segment 4 through the second bolt hole 201. Next, when assembling the outer ring template 1, the second connecting block 502 is inserted into the wedge groove 203 through the flat groove 202. Finally, the first connecting block 501 is inserted into the flat groove 202, and then the connecting bolt 7 is screwed into the third bolt hole 503 to connect the outer ring template 1. Finally, it is connected to the station main structure 3 through the first bolt hole 101, thus completing the template installation. After the template is installed, concrete can be poured into the template through the feeding trough 601. After pouring, the feeding trough 601 can be sealed with the sealing door plate 602 using fixing bolts. During feeding, a pouring pipe can also be pre-embedded in the station main structure 3, keeping the pouring pipe perpendicular to the template to prevent concrete overflow. Further details are omitted here.
[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A steel formwork for a post-cast ring beam of a shield tunnel portal, characterized in that, The system includes an outer ring template (1), an inner ring template (2), an outer ring feeding template (6), a station main structure (3), and shield tunnel segments (4). The outer ring template (1) has a first bolt hole (101) for connection to the station main structure (3), and the inner ring template (2) has a second bolt hole (201) for connection to the shield tunnel segments (4). A flat groove (202) is formed on the outer ring template (1) on the same side as the outer ring feeding template (6), and wedge-shaped grooves (203) are formed on the other outer ring templates (1). A connecting ring (5) is provided on one side of the outer ring feeding template (6). A first connecting block (501) adapted to the flat groove (202) is provided on one side of the connecting ring (5) connected to the outer ring feeding template (6). A second connecting block (502) adapted to the wedge groove (203) is provided on one side of the other connecting rings (5). A third bolt hole (503) is provided on the first connecting block (501), the outer ring feeding template (6), and the connecting ring (5) on the same side. A connecting bolt (7) is provided in the internal thread of the third bolt hole (503).
2. The steel formwork for the post-cast ring beam of the tunnel portal in a shield tunneling section according to claim 1, characterized in that, The outer ring template (1), inner ring template (2) and outer ring feeding template (6) are all fan-shaped. The outer ring template (1) and outer ring feeding template (6) form the outer ring template of the ring beam, and the inner ring template (2) forms the inner ring template of the ring beam.
3. The steel formwork for the post-cast ring beam of the tunnel portal in a shield tunneling section according to claim 1, characterized in that, The outer ring template (1), inner ring template (2) and outer ring feeding template (6) are all equipped with multiple cross-combined reinforcing ribs inside.
4. The steel formwork for the post-cast ring beam of the tunnel portal in a shield tunneling section according to claim 1, characterized in that, The outer ring feeding template (6) is provided with a concrete pouring trough (601), and a sealing door plate (602) is provided at the position of the feeding trough (601).
5. A steel formwork for the post-cast ring beam of a shield tunnel portal as described in claim 4, characterized in that, The sealing door panel (602) is provided with fixing bolts, which can be used to seal the feeding trough (601) by means of the fixing bolts.
6. The steel formwork for the post-cast ring beam of the tunnel portal in a shield tunneling section according to claim 1, characterized in that, The outer ring template (1) and the inner ring template (2) are arranged vertically.