Mould for subway segment

Abstract

The utility model discloses a mould for a subway segment, which comprises a mould base, arc-shaped side moulds and end moulds, the two arc-shaped side moulds are respectively arranged on two opposite sides of the mould base, the two end moulds are respectively arranged on the other two opposite sides of the mould base, and the two arc-shaped side moulds and the two end moulds are spliced on the mould base to form a closed-loop frame; grooves are formed in the inner walls of the arc-shaped side dies and the inner walls of the end dies, the grooves in the two arc-shaped side dies and the grooves in the two end dies are communicated to form an annular groove, the grooves in each arc-shaped side die and each end die are provided with at least two sets of bin dividing strips, and through holes are further formed in the inner walls of the grooves between the adjacent bin dividing strips. The sealing gasket has the advantages that the sealing gasket can be accurately fixed in the annular groove and integrally formed with the metro segment, the sealing gasket is not prone to being separated from the metro segment, the preassembling precision of the sealing gasket is improved, the overall durability of a sealing system is enhanced, segment production can be completed through one-time pouring, the segment production efficiency is improved, and the production cost is reduced. Meanwhile, the method is suitable for an anchoring type sealing gasket installation process.

Description

Technical Field

[0001] This utility model relates to the field of tunnel segment mold technology, specifically to a mold for subway tunnel segments. Background Technology

[0002] As a critical structure in shield tunnel construction, subway segment concrete linings must withstand complex geological environments and load conditions. Their manufacturing precision and assembly quality directly impact the tunnel's safety and durability. Traditional subway segment molds primarily employ integral casting, and the mold design directly determines the segment's quality, production efficiency, and ease of subsequent installation. However, existing segment molds still face numerous technical bottlenecks in areas such as demolding, precision control, and the fit of sealing structures.

[0003] In the prior art, Chinese utility model patent document CN220638339U discloses a subway segment mold that facilitates demolding. It employs a sliding arc-shaped baffle and a hinged end plate to make demolding smoother and reduce friction between the segment and the mold. However, this solution mainly optimizes the demolding process and does not consider the pre-installation process of the gasket, especially in the application scenario of anchored gaskets, where it cannot provide an effective installation support structure.

[0004] Chinese utility model patent document CN217648587U also proposes a subway segment mold that facilitates demolding. By setting a sliding guide structure on the mold, the side mold can move smoothly to facilitate segment demolding. However, this solution does not optimize the pre-embedding method of the gasket, and the gasket still needs to be pasted after the segment is formed, which may lead to adhesion failure or misalignment of the gasket during long-term service.

[0005] Chinese utility model patent document CN217046858U proposes an improved subway segment mold, which adopts a combined structure of middle mold, side mold and end mold, and introduces a trolley system to enable the mold to have a certain degree of automated production capability and improve manufacturing efficiency. However, this solution mainly optimizes the segment production process, and does not make targeted improvements to the installation method of the sealing gasket, which still relies on subsequent manual pasting, and cannot meet the pre-installation requirements of anchored sealing gaskets.

[0006] To address the above issues, existing subway segment molds still have shortcomings in the pre-assembly and fitting of gaskets, especially when using anchored gaskets. Traditional molds cannot provide a stable and reliable fixing structure, resulting in low gasket installation accuracy, poor production consistency, and a high risk of seal failure during service. Therefore, there is an urgent need for a segment mold that can adapt to the anchored gasket installation process to improve the pre-assembly accuracy of gaskets, enhance the overall durability of the sealing system, and optimize segment production efficiency to meet the requirements of long-term safe operation of shield tunnels. Utility Model Content

[0007] The technical problem to be solved by this utility model is how to improve the pre-installation accuracy of the sealing gasket, the production efficiency of the segment, and the installation requirements for anchor-type sealing gaskets.

[0008] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0009] A mold for subway tunnel segments includes a mold base, arc-shaped side molds, and end molds. Two arc-shaped side molds are respectively installed on opposite sides of the mold base, and two end molds are respectively installed on opposite sides of the mold base. The two arc-shaped side molds and two end molds are spliced ​​on the mold base to form a closed-loop frame.

[0010] Grooves are provided on the inner walls of the arc-shaped side mold and the end mold. The grooves on the two arc-shaped side molds and the two end molds are connected to form an annular groove. At least two compartment bars are provided on the grooves of each arc-shaped side mold and the end mold. Through holes are also provided on the inner walls of the grooves between adjacent compartment bars.

[0011] By drawing air from the cavity between the inner wall of the groove and the bottom surface of the sealing gasket through the through hole, a negative pressure is created in the cavity, allowing the sealing gasket to fit tightly against each compartment strip. This prevents the sealing gasket from moving with the flow of concrete during the pouring of subway tunnel segment concrete, ensuring that the sealing gasket is accurately fixed in the annular groove and integrally formed with the subway tunnel segment. The sealing gasket is not easily separated from the subway tunnel segment. This mold not only improves the pre-installation accuracy of the sealing gasket and enhances the overall durability of the sealing system, but also completes the tunnel segment production in one pour, improving the tunnel segment production efficiency. It is also suitable for the installation process of anchored sealing gaskets.

[0012] Preferably, a base plate is fixed to the bottom of the mold base.

[0013] Preferably, the bottom of the mold base is welded and fixed to the base plate.

[0014] Preferably, the top surface of the mold base is an arc-shaped surface.

[0015] Preferably, both the arc-shaped side mold and the end mold are detachably mounted on the mold base.

[0016] Preferably, the arc-shaped side mold and the end mold are detachably mounted on the mold base by bolts.

[0017] Preferably, both the arc-shaped side mold and the end mold are provided with ventilation holes that communicate with the through hole, and the ventilation holes on the arc-shaped side mold and the end mold are connected to form a closed loop.

[0018] Preferably, the through hole is connected to an external air intake device.

[0019] Preferably, the arc-shaped side mold is disposed between the end molds.

[0020] Preferably, the mold base, the arc-shaped side mold, and the end mold are all steel structural components.

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] By drawing air from the cavity between the inner wall of the groove and the bottom surface of the sealing gasket through the through hole, a negative pressure is created in the cavity, allowing the sealing gasket to fit tightly against each compartment strip. This prevents the sealing gasket from moving with the flow of concrete during the pouring of subway tunnel segment concrete, ensuring that the sealing gasket is accurately fixed in the annular groove and integrally formed with the subway tunnel segment. The sealing gasket is not easily separated from the subway tunnel segment. This mold not only improves the pre-installation accuracy of the sealing gasket and enhances the overall durability of the sealing system, but also completes the tunnel segment production in one pour, improving the tunnel segment production efficiency. It is also suitable for the installation process of anchored sealing gaskets. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0024] Figure 2 This is a top view of an embodiment of the present utility model. Detailed Implementation

[0025] To facilitate understanding of the technical solution of this utility model by those skilled in the art, the technical solution of this utility model will now be further described in conjunction with the accompanying drawings.

[0026] In this application, 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, an electrical connection, or a communication 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.

[0027] In this application, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. 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 expressly and specifically limited.

[0028] See Figure 1 and Figure 2This embodiment discloses a mold for subway tunnel segments, including a mold base 1, arc-shaped side molds 2, and end molds 3. The two arc-shaped side molds 2 are detachably installed on opposite sides of the mold base 1, and the two end molds 3 are detachably installed on the other opposite sides of the mold base 1. The two arc-shaped side molds 2 and the two end molds 3 are spliced ​​on the mold base 1 to form a closed-loop frame. Specifically, the arc-shaped side molds 2 are located between the end molds 3. In this embodiment, the arc-shaped side molds 2 and the end molds 3 are detachably installed on the mold base 1 by bolts.

[0029] Furthermore, the mold base 1, the arc-shaped side mold 2, and the end mold 3 are all steel structural components.

[0030] The bottom of the mold base 1 is welded and fixed with a base plate 4, so that the mold base 1 can be installed on the conveying platform or the ground through the base plate 4; the top surface of the mold base 1 is an arc-shaped surface, and the two arc-shaped side molds 2 and the two end molds 3 and the arc-shaped surface on the mold base 1 cooperate to form an arc-shaped cavity for making subway tunnel segments.

[0031] Grooves 5 are provided on the inner walls of the arc-shaped side mold 2 and the end mold 3. The grooves 5 on the two arc-shaped side molds 2 and the two end molds 3 are connected to form an annular groove for placing the sealing gasket 8. At least two compartment bars 6 are provided on the groove 5 on each arc-shaped side mold 2 and the end mold 3. Through holes 7 are also provided on the inner wall of the groove 5 between adjacent compartment bars 6. Specifically, the sealing gasket 8 is first installed in the annular groove, and then adheres to each compartment strip 6, thus forming a cavity between the inner wall of the groove 5 and the bottom surface of the sealing gasket 8. An external suction device draws air from the cavity between the inner wall of the groove 5 and the bottom surface of the sealing gasket 8 through the through hole 7, creating negative pressure in the cavity. This allows the sealing gasket 8 to adhere tightly to each compartment strip 6, ensuring that it does not move with the flow of concrete during the pouring of the subway tunnel segment concrete. This guarantees that the sealing gasket 8 is accurately fixed in the annular groove and integrally formed with the subway tunnel segment, preventing separation of the sealing gasket 8 from the segment. This mold not only improves the pre-installation accuracy of the sealing gasket 8 and enhances the overall durability of the sealing system, but also allows for the completion of tunnel segment production in a single pour, improving tunnel segment production efficiency. It is also suitable for the installation process of anchored sealing gaskets.

[0032] Furthermore, both the arc-shaped side mold 2 and the end mold 3 are provided with ventilation holes 9 that communicate with the through holes 7. The ventilation holes 9 on the arc-shaped side mold 2 and the end mold 3 are connected to form a closed loop. When it is inconvenient to draw air from other sides of the mold, the through holes 7 on that side can be blocked, and air can be drawn from one through hole 7 on one side of the mold. The ventilation holes 9 draw air into the cavity between the inner wall of all grooves 5 and the bottom surface of the sealing gasket 8 to form a negative pressure. The sealing gasket 8 can also be tightly attached to each compartment strip 6.

[0033] The working principle of this embodiment is as follows: First, two arc-shaped side molds 2 are installed on opposite sides of the mold base 1, and two end molds are installed on the other opposite sides of the mold base 1. Then, the sealing gasket 8 is installed in the annular groove, and the sealing gasket 8 is attached to each compartment strip 6. The air in the cavity between the inner wall of the groove 5 and the bottom surface of the sealing gasket 8 is sucked out from the through hole 7 by an external air suction device, so that the cavity forms a negative pressure. The sealing gasket 8 can be tightly attached to each compartment strip 6, so that the sealing gasket 8 can be accurately fixed in the annular groove and integrally formed with the subway tube segment.

[0034] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0035] The above-described embodiments are merely examples of implementation methods of the utility model. The scope of protection of this utility model is not limited to the above-described embodiments. For those skilled in the art, several modifications and improvements can be made without departing from the concept of this utility model, and these all fall within the scope of protection of this utility model.

Claims

1. A mold for subway tunnel segments, characterized in that: It includes a mold base, arc-shaped side molds, and end molds. Two arc-shaped side molds are installed on opposite sides of the mold base, and two end molds are installed on opposite sides of the mold base. The two arc-shaped side molds and two end molds are spliced ​​together on the mold base to form a closed-loop frame. Grooves are provided on the inner walls of the arc-shaped side mold and the end mold. The grooves on the two arc-shaped side molds and the two end molds are connected to form an annular groove. At least two compartment bars are provided on the grooves of each arc-shaped side mold and the end mold. Through holes are also provided on the inner walls of the grooves between adjacent compartment bars.

2. The mold for subway tunnel segments according to claim 1, characterized in that: The bottom of the mold base is fixed with a base plate.

3. A mold for subway tunnel segments according to claim 2, characterized in that: The bottom of the mold base is welded and fixed to the base plate.

4. The mold for subway tunnel segments according to claim 1, characterized in that: The top surface of the mold base is an arc surface.

5. A mold for subway tunnel segments according to claim 1, characterized in that: Both the arc-shaped side mold and the end mold can be detachably mounted on the mold base.

6. A mold for subway tunnel segments according to claim 5, characterized in that: The arc-shaped side mold and end mold are detachably mounted on the mold base by bolts.

7. A mold for subway tunnel segments according to claim 1, characterized in that: Both the arc-shaped side mold and the end mold have corresponding ventilation holes that communicate with the through holes, and the ventilation holes on the arc-shaped side mold and the end mold are connected to form a closed loop.

8. A mold for subway tunnel segments according to claim 1, characterized in that: The through hole is connected to an external air intake device.

9. A mold for subway tunnel segments according to claim 1, characterized in that: The arc-shaped side mold is located between the end molds.

10. A mold for subway tunnel segments according to claim 1, characterized in that: The mold base, arc-shaped side mold, and end mold are all steel structural components.

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