Shaped steel mold prefabricated segment

Abstract

The invention discloses a shaped steel mold prefabricated pipe piece which comprises an arc-shaped steel reinforcement cage, a steel pipe, a steel pipe and a steel pipe, and the arc-shaped steel reinforcement cage is provided with two opposite sides in the width direction of the arc-shaped steel reinforcement cage; each air-entraining vibration shifting piece is provided with a fixed end and a free end, the fixed ends are installed in the arc-shaped reinforcement cage, the positions of the air-entraining vibration shifting pieces correspond to the positions of water stopping grooves of the pipe pieces, the two opposite sides of the arc-shaped reinforcement cage are each provided with a plurality of air-entraining vibration shifting pieces, and the air-entraining vibration shifting pieces are arranged on the free ends of the air-entraining vibration shifting pieces. The multiple air entraining vibration shifting pieces are arranged at intervals in the arc forming direction of the arc-shaped reinforcement cage. And the arc-shaped reinforcement cage is coated with the concrete. The shield tunnel segment solves the problem that bubbles are easily accumulated at the positions of the water stop grooves of the circular seam and the longitudinal seam of an existing shield tunnel segment and cannot be effectively removed.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a prefabricated pipe segment using a standardized steel mold. Background Art

[0002] The "Technical Standard for Quality Inspection of Shield Tunnel Segments" requires that the total surface area of ​​shield tunnel segments, including pitting and scuffing, should not exceed 5% of the total surface area. The presence of pitting, such as bubbles, during segment production can easily affect the quality of subsequent waterproofing adhesives. These pitting issues can also damage the segments, posing safety risks. This can lead to numerous leaks, poor quality assurance, increased defects, and high maintenance costs, all of which can impact the safety of tunnel projects.

[0003] The attached vibrators commonly used in existing segment casting are generally placed at the bottom of the prefabricated segment steel mold, and the vibration effect at the circumferential and longitudinal joints of the tunnel segments is poor.

[0004] On the other hand, due to the raised molds at the annular seams and longitudinal water stop grooves of the segments, bubbles are easily accumulated and cannot be effectively removed, which can easily lead to honeycomb phenomena.

[0005] If the bubbles are forcibly removed, it may easily lead to over-vibration and segregation of the segment concrete, causing the segment to crack and affecting its quality. Summary of the Invention

[0006] In order to overcome the defects of the existing technology, a standardized steel mold prefabricated pipe segment is now provided to solve the problem that bubbles are easily accumulated in the annular seams and longitudinal seam water stop grooves of the existing shield tunnel pipe segments and cannot be effectively removed.

[0007] To achieve the above-mentioned purpose, a standardized steel mold prefabricated pipe segment is provided, comprising:

[0008] An arc-shaped steel cage having two opposite sides along a width direction of the arc-shaped steel cage;

[0009] An air-inducing vibration paddle, the air-inducing vibration paddle having a fixed end and a free end, the fixed end being mounted inside the arc-shaped steel cage, the position of the air-inducing vibration paddle corresponding to the position of the water stop groove of the pipe segment, a plurality of air-inducing vibration paddles being respectively disposed on opposite sides of the arc-shaped steel cage, the plurality of air-inducing vibration paddles being spaced apart along the arc direction of the arc-shaped steel cage;

[0010] Concrete is wrapped around the arc-shaped steel cage.

[0011] Furthermore, the free end is connected to the arc-shaped steel cage through a traction rope.

[0012] Furthermore, the fixed end is connected to the steel bars on the outer arc surface of the arc-shaped steel cage, and the free end is inclined toward the outer arc surface.

[0013] Furthermore, the inclination angle of the air-inducing vibration paddle is 50° to 60°.

[0014] Furthermore, the number of air-inducing vibration paddles provided on each side of the arc-shaped steel cage is three, and the three air-inducing vibration paddles are provided at equal intervals.

[0015] The beneficial effect of the present invention is that the prefabricated pipe segments of the standardized steel mold of the present invention are prefabricated with air-entraining vibration paddles inside the arc-shaped steel cage of the pipe segment. During the concrete pouring construction of the pipe segment, the vibration generated by the vibration drives the air-entraining vibration paddles to vibrate, thereby expanding the vibration area, and specifically enhancing the vibration near the water stop groove of the pipe segment, effectively eliminating the bubbles accumulated at the raised position of the mold water stop groove, and at the same time improving the vibration effect at the water stop joint position, which can effectively avoid shrinkage cracks in the concrete of the pipe segment at the variable cross-section position of the water stop groove due to stress concentration.

[0016] The prefabricated pipe segments using the standardized steel mold of the present invention can effectively avoid the honeycomb phenomenon at the center line of the pipe segments and effectively prevent the extension of cracks in the pipe segments.

[0017] The cast appearance of the prefabricated pipe segments of the standardized steel mold of the present invention is smooth and flat, which saves the work of repairing the pipe segments before subsequent waterproof pasting of the pipe segments, provides convenient conditions for subsequent waterproof pasting, and has a better waterproof effect than pasting after repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0019] Figure 1 This is a longitudinal cross-sectional view of a prefabricated pipe segment made of a shaped steel mold according to an embodiment of the present invention.

[0020] Figure 2 This is a transverse cross-sectional view of a prefabricated pipe segment made of a shaped steel mold according to an embodiment of the present invention.

[0021] Reference numerals:

[0022] Arc-shaped steel cage 1, air-entraining vibration paddle 2, traction rope 21, concrete 3, water-stop groove 4. DETAILED DESCRIPTION

[0023] The present application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the relevant invention and are not intended to limit the invention. It should also be noted that, for ease of description, only portions relevant to the invention are shown in the accompanying drawings.

[0024] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0025] Reference Figure 1 and Figure 2 As shown, the present invention provides a prefabricated pipe segment using a standardized steel mold, comprising: an arc-shaped steel cage 1, an air-entraining vibration paddle 2 and concrete 3.

[0026] In this embodiment, the arc-shaped steel cage 1 is in an arc shape as a whole, and its curvature is adapted to the curvature of the formed pipe segment. The arc-shaped steel cage 1 has two opposite sides along the width direction of the arc-shaped steel cage 1.

[0027] There are multiple air entrainment vibration paddles 2. Specifically, each paddle 2 has a fixed end and a free end. The fixed end is mounted within the curved rebar cage 1. The position of the paddle 2 corresponds to the position of the water stop groove 4 of the segment. Multiple air entrainment vibration paddles 2 are provided on opposite sides of the curved rebar cage 1. The multiple air entrainment vibration paddles 2 are spaced apart along the arc direction of the curved rebar cage 1.

[0028] Concrete 3 is wrapped around the arc-shaped steel cage 1 .

[0029] As a preferred embodiment, the free end of the air entraining vibration paddle 2 is connected to the arc-shaped steel cage 1 through a traction rope 21.

[0030] See Figure 2 As shown, the fixed end of the air entrainment vibration paddle 2 is connected to the steel bar on the outer arc surface of the arc-shaped steel cage 1. The free end is tilted toward the outer arc surface.

[0031] As a preferred embodiment, the inclination angle of the air-inducing vibration paddle 2 is 50° to 60°. In this embodiment, the inclination angle of the air-inducing vibration paddle 2 is 30°.

[0032] Continue to combine Figure 1 As shown, there are three air-inducing vibration paddles 2 arranged on each side of the arc-shaped steel cage 1. The three air-inducing vibration paddles 2 are arranged at equal intervals.

[0033] In this embodiment, based on the existing bubble and roughness problem of the pipe segment, the long side of the pipe segment is determined to be the area with more serious bubbles. Therefore, during the processing stage of the curved steel cage of the pipe segment, three air-entraining vibration paddles are set on each side of the curved steel cage. The air-entraining vibration paddles are made of thin iron sheets. The three air-entraining vibration paddles are respectively set at the center line of the long side of the pipe segment and one at a position 1 / 3 away from the ends on both sides. The air-entraining vibration paddles are inclined at an angle of 30° toward the inner arc surface of the pipe segment. The arrangement arc of the air-entraining vibration paddles corresponds to the arc radius of the pipe segment. The horizontal width of the air-entraining vibration paddles is 10 cm and the vertical length is 15 cm. The top of the air-entraining vibration paddles is welded to the upper row of steel bars of the curved steel cage, and the bottom of the air-entraining vibration paddles is loosely tied to the steel cage with a traction rope (such as a wire tie) to ensure the vibration effect of the air-entraining vibration paddles. The distance between the air-entraining vibration paddles and the nearest point of the pipe segment mold is 5 cm to 10 cm to prevent problems such as exposed steel bars in the pipe segment.

[0034] The prefabricated pipe segments made of a standardized steel mold of the present invention are prefabricated with air-entraining vibration paddles inside the arc-shaped steel cage of the pipe segment. During the concrete pouring construction of the pipe segment, the vibration generated by the vibration drives the air-entraining vibration paddles to vibrate, thereby expanding the vibration area, and specifically enhancing the vibration near the water stop groove of the pipe segment, effectively removing the bubbles accumulated at the raised position of the mold water stop groove, and at the same time improving the vibration effect at the water stop joint position, which can effectively avoid shrinkage cracks in the concrete of the pipe segment at the variable cross-section position of the water stop groove due to stress concentration.

[0035] The prefabricated pipe segments using the standardized steel mold of the present invention can effectively avoid the honeycomb phenomenon at the center line of the pipe segments and effectively prevent the extension of cracks in the pipe segments.

[0036] The cast appearance of the prefabricated pipe segments of the standardized steel mold of the present invention is smooth and flat, which saves the work of repairing the pipe segments before subsequent waterproof pasting of the pipe segments, provides convenient conditions for subsequent waterproof pasting, and has a better waterproof effect than pasting after repair.

[0037] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the invention herein is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the inventive concept. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features having similar functions disclosed in this application.

Claims

1. A prefabricated pipe segment made of a standardized steel mold, characterized in that: include: An arc-shaped steel cage having two opposite sides along a width direction of the arc-shaped steel cage; An air-inducing vibration paddle, the air-inducing vibration paddle having a fixed end and a free end, the fixed end being mounted inside the arc-shaped steel cage, the position of the air-inducing vibration paddle corresponding to the position of the water stop groove of the pipe segment, a plurality of air-inducing vibration paddles being respectively disposed on opposite sides of the arc-shaped steel cage, the plurality of air-inducing vibration paddles being spaced apart along the arc direction of the arc-shaped steel cage; Concrete is covered on the arc-shaped steel cage.

2. The prefabricated pipe segment of the standardized steel mold according to claim 1 is characterized in that: The free end is connected to the arc-shaped steel cage through a traction rope.

3. The prefabricated pipe segment of the standardized steel mold according to claim 1 is characterized in that: The fixed end is connected to the steel bars on the outer arc surface of the arc-shaped steel bar cage, and the free end is inclined toward the outer arc surface.

4. The prefabricated pipe segment of the standardized steel mold according to claim 3 is characterized in that: The inclination angle of the air-inducing vibration paddle is 50° to 60°.

5. The prefabricated pipe segment of the standardized steel mold according to claim 1 is characterized in that: The number of air-inducing vibration paddles arranged on each side of the arc-shaped steel cage is three, and the three air-inducing vibration paddles are arranged at equal intervals.

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