A mould for making movable core ribs in hollow floor slabs and its use

Abstract

This invention relates to the fabrication of movable core ribs in hollow core slabs and its manufacturing mold, particularly to the fabrication of extra-long movable core ribs formed by connecting several segments together and its manufacturing mold, belonging to the field of building structures. A mold for fabricating movable core ribs in hollow core slabs and its application includes a mold box and a mold cover. The cavity formed by the two is used to form the concrete movable core rib. The top of the mold box is open, serving as a concrete inlet. A columnar protrusion is provided at the bottom along its height direction, the height of which is less than the height of the movable core rib, forming a bottom groove for the movable core rib. The mold cover is adapted to the mold box and has a hole II on it, serving as an inlet for inserting a rigid rod into the mold box. This invention has the following advantages: 1. Reduces the operational difficulty of using movable core ribs; 2. Facilitates concrete pouring and curing; 3. Enables convenient demolding; 4. Meets the needs of subsequent movable core rib installation processes.

Description

Technical Field

[0001] This invention relates to the fabrication of movable core ribs in hollow floor slabs and the mold for their fabrication, particularly to the fabrication of an ultra-long movable core rib formed by connecting several segments together and the mold for its fabrication, belonging to the field of building structures. Background Technology

[0002] When using two-way prestressed precast reinforced concrete hollow slabs, in order to enhance the lateral stiffness of the hollow slabs and improve their seismic performance, post-installed precast concrete movable core ribs are used, which are laterally filled into the hollow cavities of the hollow slabs at certain intervals.

[0003] During the fabrication of movable core ribs, it is necessary to ensure that the produced ribs not only meet the requirements for shape and size, but also take into account the ease of fabrication and demolding, as well as the convenience of installing the movable core ribs into the hollow core slab later. Currently, the practice of fabricating and using movable core ribs involves fabricating an extra-long string of movable core ribs at once and then directly inserting it into the hollow cavity of the hollow core slab, which is difficult to operate. Summary of the Invention

[0004] The purpose of this invention is to solve the problems existing in the prior art and provide a mold for manufacturing movable core ribs in hollow floor slabs, so that the movable core ribs can be manufactured independently and connected to form an ultra-long movable core rib.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a mold for making movable core ribs in hollow floor slabs, comprising a mold box and a mold cover, the inner cavity formed by the two being used to form the movable concrete core rib; the top of the mold box is open as a concrete inlet, and a columnar protrusion is provided at the bottom along its height direction, the height of the columnar protrusion being less than the height of the movable core rib, for forming the bottom groove of the movable core rib; the mold cover is adapted to the mold box and has a hole II on it, serving as an inlet for the rigid rod-like member to be inserted into the mold box.

[0006] Preferably, a pipe II is provided along the axial direction of the hole II, and the height direction of the pipe II extends away from the mold box body.

[0007] Preferably, the columnar protrusion is coaxial with the hole II.

[0008] Preferably, the columnar protrusion has a hollow internal structure, and a hole I is provided at a corresponding position on the mold box. The hole I communicates with the columnar protrusion to form a pipe I, and the inner diameter of the pipe I is adapted to the rigid rod-shaped member.

[0009] Preferably, a base structure is provided at the bottom edge of the mold box to form a reaction force structure with the demolding gun during demolding.

[0010] Preferably, pipe I and mold box body, and pipe II and mold cover are all integrally formed.

[0011] Preferably, the inner diameter of the mold cover is larger than the outer diameter of the top opening of the mold box body, so as to seal the top of the mold box body.

[0012] Another object of the present invention is to provide an application for a mold for manufacturing movable core ribs in hollow floor slabs, using the mold as described above, comprising the following steps:

[0013] (1) Place the mold box body;

[0014] (2) Pour concrete into the mold box;

[0015] (3) Cover the mold with the lid;

[0016] (4) A rigid rod is inserted through hole II and pipe II;

[0017] (5) Let it stand until the conditions for demolding are met;

[0018] (6) Use a demolding gun to apply pressure to pipe I of the mold box to demold the movable core rib;

[0019] (7) Remove the mold cover to obtain the movable core rib.

[0020] The process of installing movable core ribs into hollow core slabs includes the following steps:

[0021] (1) Install hollow floor slabs;

[0022] (2) Place the first movable core rib (without rigid rod) into the hollow cavity of the hollow floor slab, with the grooved end facing outward;

[0023] (3) Press the end of the rigid rod-shaped part of the second movable core rib against the first movable core rib, insert it into the groove of the first movable core rib, and then push it into the hollow cavity;

[0024] (4) Repeat step 3;

[0025] (5) Installation complete.

[0026] Principle: The columnar protrusions at the bottom of the mold box form the bottom groove of the movable core rib. Rigid rods can be inserted into the holes II and pipes II on the mold cover. The rigid rods of adjacent movable core ribs are adapted to the grooves. Several independently manufactured movable core ribs are placed into the hollow cavity of the hollow floor slab one by one. At the same time, adjacent movable core ribs are connected by rigid rods to form an extra-long movable core rib. This not only ensures that the manufactured movable core ribs meet the shape and size requirements, but also takes into account the convenience of the manufacturing and demolding process as well as the subsequent installation process.

[0027] Compared with the prior art, the present invention has the following advantages:

[0028] 1. The previous process of making an extra-long movable core rib string at once and inserting it directly into the hollow cavity of the hollow floor slab has been improved to a process of making movable core ribs individually and installing them section by section, which greatly reduces the operational difficulty of using movable core ribs.

[0029] 2. The movable core ribs can be made individually, which makes it easier to pour concrete and carry out curing;

[0030] 3. The bottom of the mold box has pipe I. During demolding, a demolding gun can be inserted and pressurized to separate the movable core rib from the mold, making demolding convenient.

[0031] 4. Pipe I and the mold box are an integral structure. When making the movable core rib, a groove is directly formed at the bottom of the movable core rib to meet the process requirements of the later installation of the movable core rib.

[0032] 5. The mold cover has pipe II, which, after pouring concrete into the mold, serves to insert and fix the reinforcing bars, meeting the process requirements for later installation of movable core ribs. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0034] Figure 2 yes Figure 1 A schematic diagram of the middle mold box structure, in which, Figure 2 a is a 3D view of the mold box; Figure 2 b is a top view of the mold box;

[0035] Figure 3 yes Figure 1 A schematic diagram of the structure of the middle mold cover, wherein, Figure 3 a is a 3D view of the mold cover; Figure 3 b is a top view of the mold cover;

[0036] Figure 4 This is a schematic diagram of the demolding process using the demolding gun in Embodiment 1.

[0037] Figure 5 This is a schematic diagram of the finished product with movable core ribs manufactured according to Embodiment 1 of the present invention;

[0038] Figure 6 This is the manufacturing process of the movable core rib in Embodiment 1 of the present invention;

[0039] Figure 7 This is the process flow of installing the movable core rib into the hollow floor slab according to Embodiment 1 of the present invention;

[0040] In the diagram, 1 is the mold box; 2 is the mold cover; 3 is pipe I; 4 is the base; 5 is pipe II; 6 is the movable core rib; 6-1 is the groove; 6-2 is the reinforcing bar; and 7 is the demolding gun. Detailed Implementation

[0041] It should be noted that in this embodiment, the directional terms "top" and "bottom" are used in accordance with the accompanying drawings and do not constitute a limitation on the present invention.

[0042] Example 1

[0043] The following is in conjunction with the appendix Figure 1-7 The invention is further described in detail below: A mold for manufacturing movable core ribs in hollow floor slabs includes a mold box 1 and a mold cover 2. The inner diameter of the mold cover 2 is slightly larger than the outer diameter of the top opening of the mold box 1, and is used to seal the top of the mold box 1. The cavity formed by the two is used to form the concrete movable core rib 6; as shown below. Figure 2 As shown, the top of the mold box 1 is open, serving as a concrete inlet, and the bottom has a hole I. A pipe I3 ​​is installed along the axial direction of the hole I. The inner diameter of the hole I and the pipe I3 ​​are the same, and the height of the pipe I3 ​​extends into the mold box 1, with its height being less than the height of the movable core rib 6, thus forming a bottom groove 6-1 for the movable core rib; Figure 3 As shown, the mold cover 2 is adapted to the mold box 1, and a hole II is provided on it, which serves as the entrance for the reinforcing bar 6-2 to be inserted into the mold box 1. A pipe II5 is provided along the axial direction of the hole II. The height direction of the pipe II5 extends away from the mold box 1. When concrete is poured into the mold, it serves to insert and fix the reinforcing bar 6-2, which meets the process requirements for the later installation of the movable core rib 6.

[0044] As a preferred embodiment, pipe I3 ​​and pipe II5 are arranged coaxially.

[0045] As a preferred embodiment, a base 4 is provided at the bottom edge of the mold box 1 to form a reaction structure with the demolding gun 7 during demolding, so as to prevent the mold box 1 from flying out during demolding.

[0046] As a preferred embodiment, pipe I3 ​​and mold box 1, and pipe II5 and mold cover 2 are all integrally formed.

[0047] The specific structure is as follows:

[0048] like Figure 2 As shown in Figure a, the mold box 1 has an irregular cross-section with a round top and a round bottom. A hole I and a pipe 3 are located in the center of the bottom for the demolding gun 7 to apply pressure during demolding. The bottom has a base 4 with an edge, which forms a reaction force with the demolding gun 7 during demolding, preventing the mold box from flying out. Simultaneously, it allows one end of the manufactured movable core rib 6 to form a groove 6-1. For example... Figure 2As shown in Fig. b, the thickness of the material used for the box body is d1, and the net height inside is H1; the inner length of the upper square part is 2a, the width is b, and the fillet radius is r; the inner radius of the lower circular part is R, and R = a; the diameter of the middle pipe is D1, and the height is h1, where h1 < H1.

[0049] As Figure 3 shown in Fig. a, the mold cover 2 is adapted to the mold box body 1, and a hole II and a pipe 5 are opened in the middle of the top for inserting and fixing the steel bar 6-2 during the process of making the movable core rib 6. As Figure 3 shown in Fig. b, the thickness of the material used for the cover is d2, and the net height inside is H2; the inner length of the upper square part is 2×(a + d1), the width is b + d1; the inner radius of the lower circular part is R + d1; the inner diameter of the middle pipe is D2, and the height is h2, where h2 < H2.

[0050] As Figure 4-6 shown, a technological process for making movable core ribs in a hollow floor slab using the above-mentioned mold includes the following steps:

[0051] (1) Place the mold box body 1;

[0052] (2) Pour concrete into the mold box body 1;

[0053] (3) Cover the mold cover 2;

[0054] (4) Insert the steel bar 6-2 through the hole II and the pipe II 5;

[0055] (5) Let it stand until it reaches the condition for removing the mold;

[0056] (6) Pressurize the pipe I of the mold box body 1 with a demolding gun 7 to demold the movable core rib;

[0057] (7) Remove the mold cover to obtain the movable core rib.

[0058] As Figure 7 shown, the technological process for installing the movable core rib 6 into the hollow floor slab includes the following steps:

[0059] (1) Place the hollow floor slab;

[0060] (2) Put the first movable core rib (without the steel bar 6-2) into the hollow cavity of the hollow floor slab, with the grooved end facing outwards;

[0061] (3)顶住 the end of the second movable core rib with the steel bar 6-2 against the first movable core rib, insert it exactly into the groove of the first movable core rib, and then push it into the hollow cavity;

[0062] (4) Repeat step 3;

[0063] (5) The installation is completed.

[0064] As a preferred embodiment, the shape of the movable core rib 6 is adapted to the inner diameter of the hollow cavity of the hollow floor slab. The cross-sectional shape of the movable core rib 6 is not limited to the irregular size described in this embodiment, but can also be circular, elliptical, etc.

[0065] Example 2

[0066] A mold for making movable core ribs in hollow floor slabs includes a mold box and a mold cover. The inner diameter of the mold cover is slightly larger than the outer diameter of the top opening of the mold box, which is used to seal the top of the mold box. The cavity formed by the two is used to form the concrete movable core rib. The top opening of the mold box serves as a concrete inlet, and a columnar protrusion is provided at the bottom along its height direction. The height of the columnar protrusion is less than the height of the movable core rib, which is used to form the bottom groove of the movable core rib. The mold cover is adapted to the mold box and has a hole II on it, which serves as an inlet for inserting reinforcing bars into the mold box.

[0067] As a preferred embodiment, a pipe II is provided along the axial direction of the hole II. The height direction of the pipe II extends away from the mold box. When concrete is poured into the mold, it serves to insert and fix the reinforcing bars, thus meeting the process requirements for the later installation of the movable core rib.

[0068] In the process of manufacturing the movable core rib in the hollow floor slab, other demolding methods besides the demolding gun can be used to separate the movable core rib from the mold box. Other process flows and the process of installing the movable core rib into the hollow floor slab are similar to those in Example 1, and will not be repeated here.

[0069] The above embodiments are merely preferred embodiments of the present invention and do not constitute a limitation thereof. Except for the first movable core rib inserted into the hollow floor slab without reinforcing bars, the last movable core rib of the hollow floor slab may also lack a groove, or only reinforcing bars may be inserted into the groove. Furthermore, the length of the reinforcing bars inserted into the mold cover is greater than or equal to the groove depth at the bottom of the mold box. Those skilled in the art should understand that any extensions or modifications made without departing from the principles of the present invention are within the protection scope of the present invention.

Claims

1. A mold for manufacturing movable core ribs in hollow floor slabs, characterized in that: It includes a mold box body and a mold cover, and the inner cavity formed by the two is used to form the movable core rib of concrete; The top of the mold box is open as a concrete inlet, and a columnar protrusion is provided at the bottom along its height direction. The height of the columnar protrusion is less than the height of the movable core rib, which is used to form the bottom groove of the movable core rib. The mold cover is adapted to the mold box and has a hole II on it, which serves as an inlet for the rigid rod to be inserted into the mold box. A pipe II is provided along the axial direction of hole II, and the height direction of pipe II extends away from the mold box body; the columnar protrusion is coaxial with hole II; the interior of the columnar protrusion is hollow, and a hole I is opened at the corresponding position on the mold box body. The hole I and the columnar protrusion are connected to form pipe I, and the inner diameter of pipe I is adapted to the rigid rod-shaped member.

2. The mold for manufacturing movable core ribs in hollow floor slabs according to claim 1, characterized in that: A base structure is provided at the bottom edge of the mold box to form a reaction force structure with the demolding gun during demolding.

3. The mold for manufacturing movable core ribs in hollow floor slabs according to claim 1, characterized in that: Pipe I and the mold box body, and pipe II and the mold cover are all integrally formed.

4. The mold for manufacturing movable core ribs in hollow floor slabs according to claim 1, characterized in that: The inner diameter of the mold cover is larger than the outer diameter of the opening at the top of the mold box, which is used to seal the top of the mold box.

5. An application of a mold for manufacturing movable core ribs in hollow floor slabs, characterized in that: Using the mold as described in any one of claims 1-4, the steps include: (1) Place the mold box body; (2) Pour concrete into the mold box; (3) Cover the mold with the lid; (4) A rigid rod is inserted through hole II and pipe II; (5) Let it stand until the conditions for demolding are met; (6) Use a demolding gun to apply pressure to pipe I of the mold box to demold the movable core rib; (7) Remove the mold cover to obtain the movable core rib.

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