A construction method for tooling for pre-reserved holes of risers

Abstract

The present invention relates to the technical field of riser installation, and specifically discloses a tool for reserving a reserved hole for a riser, including a truncated cone-shaped mold body installed on a structural plate bottom mold, and a locking mechanism for locking the mold body and the structural plate bottom mold. A construction method for reserving a reserved hole for a riser is also disclosed, which specifically includes the following steps: installing the tool at a position corresponding to the riser; pouring concrete on the structural plate; taking out the tool, and installing the riser at the position of the reserved hole; and using expansive concrete to pour a groove between the outer wall of the riser and the structural plate. The present invention installs a truncated cone-shaped mold body structural plate, and then pours concrete on the structural plate, so that the inclined surface of the reserved hole forms an angle with the riser, and when the secondary concrete is poured, it is not necessary to support the formwork again; the angle formed by the inclined surface of the reserved hole and the riser will also stabilize the stress of the secondary concrete, and can ensure that the bonding between the secondary blocking concrete and the inclined surface of the concrete structure is more firm.

Description

Technical Field

[0001] The present invention relates to the technical field of vertical pipe installation in construction engineering, and more specifically, to a construction method for a tooling for reserving a reserved hole for a vertical pipe. Background Art

[0002] During the construction process of a building, a vertical pipe needs to reserve a hole in the structural slab in advance according to the diameter size of the vertical pipe. After the vertical pipe is installed, concrete is then cast into the gap between the vertical pipe and the reserved hole. When casting concrete into the gap between the vertical pipe and the reserved hole, currently, a vertical pipe hanging formwork PVC mold method is used to support the hanging hole, or a wire is passed through the hanging hole formwork and the hanging hole formwork is suspended at the bottom of the reserved hole. However, these two support methods still have some drawbacks in the actual construction process: First, although the professional hanging formwork PVC mold for the vertical pipe is simple and convenient, the model is fixed. If it is necessary to simultaneously construct the hanging hole plugging between different floors on site, a large amount of money needs to be spent to purchase a large number of various models of molds; Second, although the wire hanging glue formwork can make full use of the materials on site, it is labor-consuming and material-consuming to manufacture, and a large amount of time is required for formwork support and removal. The forming effect of the mold is poor, and there is a large groove between the vertical pipe and the reserved hole, which has a potential water seepage hazard. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a construction method for a tooling for reserving a reserved hole for a vertical pipe.

[0004] The solution adopted by the present invention to solve the technical problem is as follows:

[0005] On the one hand, a tooling for reserving a reserved hole for a vertical pipe, which is used in cooperation with the bottom formwork of the structural slab, includes a mold body in the shape of a frustum of a cone and installed on the bottom formwork of the structural slab, and a locking mechanism for locking the mold body and the bottom formwork of the structural slab; the axis of the mold body is coaxial with the axis of the vertical pipe.

[0006] The present invention installs a frustum-shaped mold body on the structural slab, then pours the concrete of the structural slab. After the pouring is completed, the mold body is removed, so that a reserved hole is formed on the structural slab. Then, a closed integral is formed again between the lower opening of the inclined surface of the reserved hole and the outer circumference of the vertical pipe wall, and no formwork is supported anymore; compared with the prior art, an included angle is formed between the inclined surface of the reserved hole on the structural slab and the vertical pipe, and the concrete for plugging the reserved hole is stable in force, which can ensure that the concrete for plugging the reserved hole and the inclined surface of the concrete structure are more firmly bonded.

[0007] In some possible implementation manners, it further includes an upper mold in the shape of a cylinder and installed on the side of the mold body away from the bottom plate of the bottom structural slab; the upper mold is coaxially arranged with the mold body.

[0008] In some possible embodiments, to reduce the weight of the tooling and make the installation and removal more convenient and efficient; the upper die and the mold body are of a hollow structure, the large end of the upper die is connected to the mold body, and the small end of the mold body is installed on the structural plate bottom mold.

[0009] In some possible embodiments, through holes are respectively provided at the top of the upper die and the bottom of the mold body, and the through holes are coaxial with the axis of the upper die.

[0010] In some possible embodiments, to effectively fix the tooling; the locking mechanism includes a screw passing through the two through holes and connected to the structural plate bottom mold, and a nut sleeved on the screw and located above the upper die.

[0011] In some possible embodiments, the included angle between the side surface of the mold body and the structural plate bottom mold is 30° - 60°.

[0012] In some possible embodiments, the height of the mold body in its axial direction is the same as the height of the structural plate concrete.

[0013] On the other hand, a tooling for reserving a riser reserved hole specifically includes the following steps:

[0014] According to the position of the riser, install the tooling at the corresponding position and make the axis of the riser coaxial with the axis of the tooling;

[0015] Pour the structural plate concrete;

[0016] After the structural plate concrete reaches the initial setting, remove the tooling and install the riser at the reserved hole position;

[0017] Use expanded concrete to pour the groove between the outer wall of the riser and the structural plate.

[0018] In some possible embodiments, the expanded concrete is micro-expansion fine aggregate concrete.

[0019] In some possible embodiments, the angle of the micro-expansion fine aggregate concrete along the axial direction of the riser is h, the thickness of the structural plate is H, and H - h = 10 mm.

[0020] Compared with the prior art, the beneficial effects of the present invention:

[0021] In the present invention, by installing the frustum-shaped mold body structural plate and then pouring the structural plate concrete, an included angle is formed between the reserved hole inclined surface and the riser. When performing secondary concrete pouring, it is not necessary to form a mold again; the included angle formed between the reserved hole inclined surface and the riser will also make the secondary concrete stress stable, and it can ensure that the concrete used to seal the reserved hole is more firmly bonded to the concrete structure inclined surface;

[0022] The structure of the present invention is simple, which can effectively accelerate the construction progress and save the construction period. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of the present invention;

[0024] Figure 2 is a schematic cross-sectional structural diagram of the present invention and the structural slab concrete;

[0025] Figure 3 is an installation schematic diagram of the present invention and the bottom formwork of the structural slab;

[0026] Figure 4 is a bottom view of the present invention;

[0027] Figure 5 is a schematic diagram of the connection relationship between the mold body and the mold parts in the present invention;

[0028] Figure 6 is a schematic structural diagram of the mold parts in the present invention;

[0029] Among them: 11, mold body; 12, upper mold; 13, mold parts; 131, boss; 2, screw; 3, nut; 4, bottom formwork of the structural slab; 5, riser pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] To make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention. Therefore, the detailed description of the embodiments of the present invention provided below is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention.

[0031] In the description of the present invention, it should be understood that the terms indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0032] In the drawings of the present invention, it should be understood that different technical features that are not mutually substitutable are shown in the same drawing, only for the convenience of simplifying the drawing description and reducing the number of drawings, rather than indicating or implying that the embodiments described with reference to the drawings include all the technical features in the drawings, and therefore should not be construed as a limitation of the present invention.

[0033] In the present invention, unless otherwise clearly specified and defined, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] The following is a detailed description of the present invention.

[0035] As Figures 1-4 shown,

[0036] On the one hand, a tooling for reserving a reserved hole for a riser 5, which is used in cooperation with a bottom formwork 4 of a structural slab, includes a mold body 11 in the shape of a frustum of a cone and installed on the bottom formwork 4 of the structural slab, and a locking mechanism for locking the mold body 11 and the bottom formwork 4 of the structural slab; the axis of the mold body 11 is coaxial with the axis of the riser 5.

[0037] The present invention uses a frustum-shaped mold body 11 to be installed on the structural slab, and then the concrete of the structural slab is poured. After the pouring is completed, the mold body 11 is removed, so that a reserved hole is formed on the structural slab. Then, a closed whole is formed again between the lower opening of the inclined surface of the reserved hole and the outer periphery of the wall of the riser 5, and no more formwork is supported; compared with the prior art, the included angle between the inclined surface of the reserved hole on the structural slab and the riser 5 is such that the concrete for plugging the reserved hole is stable in force, and it can ensure that the bonding between the concrete for plugging the reserved hole and the inclined surface of the concrete structure is firmer.

[0038] In some possible embodiments, it further includes an upper mold 12 in the shape of a cylinder and installed on the side of the mold body 11 away from the bottom plate of the bottom structural slab; the upper mold 12 is coaxially arranged with the mold body 11.

[0039] The purpose of setting the upper mold 12 is to better control the pouring thickness of the structural slab;

[0040] Preferably, scale lines are provided on the upper mold 12, and the scale lines are arranged vertically, so that it is convenient to control the height of the structural slab when leveling the structural slab.

[0041] In some possible embodiments, in order to reduce the weight of the tooling and make the installation and removal more convenient and efficient; the upper mold 12 and the mold body 11 are of a hollow structure, the large end of the upper mold 12 is connected to the mold body 11, and the small end of the mold body 11 is installed on the bottom formwork 4 of the structural slab.

[0042] In some possible embodiments, the included angle a between the side surface of the mold body 11 and the bottom formwork 4 of the structural slab is 30° - 60°.

[0043] Preferably, the included angle between the side surface of the mold body 11 and the bottom mold 4 of the structural plate is 45°; this facilitates the production of the mold body 11. At the same time, the slope of the reserved hole formed by the concrete pouring of the structural plate is relatively large. When the secondary concrete is poured, the secondary concrete is more stable under force and can effectively ensure better and firmer connection between the two poured concretes.

[0044] In some possible implementation manners, through holes are respectively arranged at the top of the upper mold 12 and the bottom of the mold body 11, and the through holes are coaxial with the axis of the upper mold 12.

[0045] In some possible implementation manners, in order to effectively fix the tooling; the locking mechanism includes a screw rod 2 passing through the two through holes and connected to the bottom mold 4 of the structural plate, and a nut 3 sleeved on the screw rod 2 and located above the upper mold 12.

[0046] Preferably, a nut 3 matching with the screw rod 2 is also sleeved at one end of the screw rod 2 penetrating through the bottom mold 4 of the structural plate. The upper mold 12 and the structural plate are fixed by the two nuts 3, making the installation more firm and preventing deviation during the concrete pouring process of the structural plate.

[0047] In some possible implementation manners, the height of the mold body 11 in its axial direction is the same as the height of the structural plate concrete.

[0048] Preferably, the diameter of the upper mold 12 is at least 3 times the diameter of the riser 5, and the height of the mold body 11 is greater than the thickness of the structural plate. In this way, the mold body part can be truncated according to the diameter of the riser 5; thus, the construction of reserved holes for risers 5 with different diameters can be realized.

[0049] In some possible implementation manners, as Figure 5 、 Figure 6 shown, in order to make the use range of this tooling wider; it further includes a mold part 13 detachably connected to the small end of the mold body 11. The mold part 13 is in the shape of a frustum of a cone, and the diameter of its large end is the same as the diameter of the small end of the mold body 11. A ring-shaped groove is arranged on one side of the mold body 11 close to the mold part 13, and a boss 131 matching with the ring-shaped groove is arranged at the large end of the mold part 13. Preferably, the axis of the ring-shaped groove is on the same straight line as the axis of the mold body 11.

[0050] When the above detachable solution is adopted, the height of the mold body 11 in its axial direction will be inconsistent with the height of the structural plate concrete.

[0051] On the other hand, a tooling for reserving a reserved hole for the riser 5 specifically includes the following steps:

[0052] Install the tooling at the corresponding position according to the position of the riser 5, and make the axis of the riser 5 coaxial with the axis of the tooling. Fix the tooling on the bottom formwork 4 of the structural slab through the locking device;

[0053] Bind the steel bars of the structural slab, install the formwork, and pour the concrete of the structural slab;

[0054] After the concrete of the structural slab reaches the initial setting, remove the tooling and install the riser 5 at the reserved hole position; at this time, the through holes on the structural slab for the screw rod 2 to pass through can be closed;

[0055] Pour the groove between the outer wall of the riser 5 and the structural slab with expansive concrete.

[0056] Preferably, the grade of the expansive concrete is higher than that of the structural concrete. For example, if the concrete of the structural slab is C25, the expansive concrete can be C30.

[0057] In some possible implementation manners, the expansive concrete is micro-expansive fine aggregate concrete.

[0058] In some possible implementation manners, for the convenience of later waterproof treatment at this place; the angle of the micro-expansive fine aggregate concrete along the axis direction of the riser 5 is h, and the thickness of the structural slab is H, H - h = 10 mm.

[0059] Such a setting will make a circular groove formed on one side of the structural slab close to the riser 5, the outer side of the riser 5, and the top surface of the expansive concrete; later, waterproof treatment can be carried out between the riser 5 and the structural slab at this part to avoid water leakage at this place.

[0060] Example:

[0061] This example is for the installation construction of the riser 5 with a diameter of 110 mm:

[0062] Adopt a tapered barrel mold with a wall thickness of 2 mm. The tapered barrel mold described here includes an upper mold 12 and a mold body 11; the tapered barrel is a closed structure, and a through hole with a size d = 12 mm is provided at the coaxial center positions of the upper large circle and the bottom small circle. The diameter of the upper large circle is d = 312 mm, and the diameter of the bottom small circle is d = 112 mm; the height h of the tapered barrel, that is, the mold body 11, is 200 mm, the height h of the upper part, that is, the upper mold 12, is 100 mm and it is a cylinder with a diameter d = 312 mm, the height of the bottom, that is, the mold body 11, is h = 100 mm and the diameter of the small end is d = 112 mm, and the included angle formed by the outer side surface of the mold body 11 and the structural slab is 45°.

[0063] The size of the upper large circle described here is the diameter of the upper mold 12; the size of the bottom small circle is the diameter of the small end of the mold body 11;

[0064] Use a screw rod 2 with a diameter of Φ = 12 mm to fix it at the center point position of the reserved hole on the fair - faced formwork. The end of the screw rod 2 passes through the through - holes at the bottom and top of the aluminum conical barrel mold in sequence, and then use a screw rod cap to sleeve onto the screw rod and rotate downward in sequence to fix the aluminum conical barrel mold. The inclined plane of the aluminum conical barrel mold forms a 45° angle with the fair - faced formwork.

[0065] Pour concrete for the structural slab to ensure that the area around the aluminum conical mold is poured densely.

[0066] Take out the aluminum conical barrel mold after the concrete has initially set and before it has finally set. The inclined plane of the reserved hole on the structural slab forms a 45° angle with the fair - faced formwork.

[0067] After removing the fair - faced formwork, the lower - mouth diameter of the inclined plane of the reserved hole on the structural slab is d = 112 mm, and the upper - mouth diameter d = 312 mm.

[0068] Install a riser 5 with D = 110 mm. There is a 1 - mm gap between the outer wall surface of the riser 5 and the circular arc around the lower - mouth of the inclined plane of the reserved hole on the structural slab.

[0069] Fill the gap between the riser 5 with D = 110 mm and the inclined plane of the reserved hole on the structural slab with slightly - expanded fine - aggregate concrete. The slightly - expanded fine - aggregate concrete poured is 10 mm lower than the top surface of the original structural slab, which is beneficial for strengthening the waterproofing joint treatment in the later stage.

[0070] The present invention is not limited to the foregoing specific embodiments. The present invention extends to any new feature or any new combination disclosed in this specification, as well as any new method or process step or any new combination disclosed.

Claims

1. A construction method for reserving a standpipe reserved hole, characterized in that: Based on a tooling for preserving a reserved hole for a riser, the tooling is used in conjunction with a bottom mold of a structural plate, the tooling comprises a truncated cone-shaped mold body mounted on the bottom mold of the structural plate, and a locking mechanism for locking the mold body and the bottom mold of the structural plate; it also comprises an upper mold which is mounted on the side of the mold body away from the bottom plate of the bottom structural plate and is cylindrical; the upper mold is coaxially arranged with the mold body; the upper mold and the mold body are hollow structures, the upper mold is connected to the large end of the mold body, and the small end of the mold body is mounted on the bottom mold of the structural plate; the top of the upper mold and the bottom of the mold body are respectively provided with through holes, and the through holes are coaxial with the axis of the upper mold; the locking mechanism comprises a screw rod which passes through two through holes and is connected to the bottom mold of the structural plate, and a nut which is sleeved on the screw rod and is located above the upper mold; the angle between the side surface of the mold body and the bottom mold of the structural plate is 30°-60°; the height of the mold body in the axial direction is consistent with the height of the concrete of the structural plate; The specific steps include: According to the position of the riser, install the tooling at the corresponding position, and make the axis of the riser coaxial with the axis of the tooling; Structural slab concrete pouring; After the structural slab concrete reaches initial setting, take out the tooling and install the riser at the reserved hole position; Use expansive concrete to cast the groove between the outer wall of the riser and the structural slab; The expansive concrete is slightly expansive fine stone concrete; the angle of the slightly expansive fine stone concrete along the axis of the riser is h, and the thickness of the structural plate is H, Hh=10 mm.

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