Waterproof construction method for ventilation holes in silo top

Abstract

The invention relates to a waterproof construction method for a ventilation hole in a silo top. The waterproof construction method comprises the following construction steps of S100, formwork erecting of the silo top, S200, formwork erecting of a ventilation hole channel, S300, primary pouring, S400, flange ring mounting, S500, secondary pouring and S600, overall formwork dismounting. Original separated secondary pouring of a silo top and a ventilation duct is improved into primary pouring of the silo top and a waterproof platform, secondary pouring of other ventilation ducts is achieved, the bottom of an outer mold sleeve is fixedly connected with a silo top framework through an outer mold cushion block, and a duct pouring cavity is communicated with a pouring area of the silo top. The waterproof platform and the granary top are poured together to form a continuous structure during one-time pouring, the whole waterproof platform is higher than the top face of the granary top by controlling the slump, so that a cold seam originally located at the joint of the granary top and the ventilation hole is integrally moved upwards to the upper portion of the waterproof platform, and the cold seam is not located on a rainwater collection or seepage path any more; the problem that an existing silo top vent hole pouring technology is prone to causing water leakage can be effectively solved, and the waterproof capacity is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, specifically to a method for waterproofing ventilation holes on warehouse roofs. Background Technology

[0002] Existing shallow circular or conical silo roofs typically have several ventilation holes for airflow balance and ventilation in grain silos, raw material silos, or storage tanks. Existing silo roof ventilation holes are usually constructed using a "staged construction method," which involves first erecting formwork and pouring concrete for the entire silo roof. Once the concrete reaches the required strength, the ventilation hole locations on the silo roof are manually roughened to create a rough interface, and then a second formwork is erected and poured to form the ventilation hole cylinder.

[0003] However, since the concrete for the ventilation holes and the main concrete for the silo roof are poured in two separate pours, a noticeable cold joint will be formed in between. The silo roof structure is often designed with a slope, which allows water to flow down the silo roof. When the water flows around the ventilation holes, the cold joint can easily become a seepage channel, especially in the area of ​​the cold joint near the water-facing side. If water seeps in along the cold joint, it will cause the waterproof layer of the silo roof to fail, resulting in frequent leaks at the joint between the ventilation holes and the silo roof.

[0004] Therefore, it is necessary to study a waterproof construction method for ventilation holes on warehouse roofs. Summary of the Invention

[0005] Therefore, the purpose of this invention is to provide a waterproof construction method for ventilation holes on warehouse roofs, which can effectively solve the problem of water leakage that is easily caused by the existing pouring process for ventilation holes on warehouse roofs.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A method for waterproofing ventilation holes on warehouse roofs includes the following construction steps: S100: Warehouse roof formwork; Erect the bottom formwork and tie the top frame of the silo above the bottom formwork. Ventilation holes are opened or reserved on both the bottom formwork and the top frame of the silo. S200: Formwork support for ventilation ducts; First, insert and fix the inner mold sleeve through the ventilation hole; Next, a channel skeleton is tied to the top frame of the warehouse. The channel skeleton is set around the inner mold sleeve, and there is an insertion gap between the upper part of the channel skeleton and the inner mold sleeve. Finally, an outer mold sleeve is fitted onto the duct skeleton to form the duct casting cavity. The bottom of the outer mold sleeve is fixedly connected to the top skeleton of the silo through an outer mold pad. The outer mold pads are spaced around the circumference so that the duct casting cavity is connected to the casting area of ​​the top of the silo. S300: One-time pouring; Pour the concrete for the top of the silo, ensuring that the top surface of the concrete is flush with the bottom of the outer formwork sleeve; Simultaneously, concrete is poured into the duct casting cavity to form a waterproof platform. The slump of the concrete must be controlled during pouring to ensure that the upper surface of the waterproof platform is higher than the top of the slab. S400: Install flange ring; After the initial setting of the first pour, insert the lower part of the flange ring into the insertion gap between the duct skeleton and the inner mold sleeve. S500: Secondary pouring; Using the same grade of concrete as the first pour, and controlling the slump to be greater than that of the first pour, a second pour is carried out in the duct pouring cavity to form a complete ventilation duct, and the lower part of the flange ring is pre-embedded and fixed. S600: Complete demolding; After final setting, the inner mold sleeve, outer mold sleeve plate and bottom mold are removed in sequence.

[0007] Furthermore, it also includes step S700: setting up a waterproof paving structure; The waterproofing structure includes an insulation layer, wire mesh, leveling layer, waterproof mortar layer, and waterproof membrane. The insulation layer is continuously laid on the top of the warehouse and the outer wall of the ventilation ducts; The insulation layer is provided with wire mesh in the area on the top of the silo, and a leveling layer is laid on the wire mesh. The insulation layer is covered with a waterproof mortar layer in the area where the ventilation ducts are located; Waterproof membrane is continuously laid on the leveling layer and the waterproof mortar layer.

[0008] Furthermore, a sealing ring seat is fixedly fitted on the flange ring, the sealing ring seat is located above the ventilation channel, and the upper end of the waterproof membrane extends upward to the lower part of the sealing ring seat and is fixedly connected to the sealing ring seat with sealant.

[0009] Furthermore, a protective aluminum plate is fixedly fitted onto the flange ring. The protective aluminum plate is in the shape of a downwardly expanding cone to cover the sealing ring seat and the entire ventilation channel.

[0010] Furthermore, an annular rubber gasket is provided between the protective aluminum plate and the flange ring, and the rubber gasket is located on the upper surface of the sealing ring seat.

[0011] Furthermore, pre-embedded anchor bars are installed in the top of the silo, and the pre-embedded anchor bars are fixedly connected to the wire mesh.

[0012] Furthermore, the inner mold sleeve includes several continuously circumferentially arranged mold pieces, which are spliced ​​together along the circumference to form a sleeve structure; An inner disc is fitted onto the inner surface of the sleeve structure to form internal support; The outer surface of the sleeve structure is bound with ropes to attach and fix each module to the outer circle of the inner disc.

[0013] Furthermore, the module is provided with rope grooves for accommodating ropes, and the rope grooves are positioned corresponding to the inner disc and are arranged in multiple sets at intervals.

[0014] Furthermore, the duct skeleton is circumferentially fixedly connected with connecting ribs, which are fixedly connected to the bottom of the flange ring.

[0015] Furthermore, the bottom of the flange ring is provided with an outer edge plate, and the outer edge plate is provided with alignment holes corresponding to the positions of the connecting ribs. One end of the connecting rib extends upward and is inserted and fixed in the alignment hole.

[0016] The beneficial effects of the above technical solution are: (1) This invention improves the original separate secondary casting of the silo top and ventilation ducts into a single casting of the silo top and waterproof platform, and secondary casting of the remaining ventilation ducts. The bottom of the outer mold sleeve is fixedly connected to the silo top frame through the outer mold pads. The outer mold pads are circumferentially spaced so that the duct casting cavity is connected to the casting area of ​​the silo top. This allows the waterproof platform and the silo top to be cast together to form a continuous structure during the first casting. By controlling the slump, the waterproof platform is made to be higher than the top surface of the silo top. This moves the cold joint that was originally located at the junction of the silo top and the ventilation ducts to the upper part of the waterproof platform. The cold joint is no longer in the path of rainwater collection or seepage. This can effectively solve the problem of water leakage caused by the existing silo top ventilation duct casting process and can effectively improve the waterproofing ability.

[0017] (2) This invention continuously sets up a waterproof paving structure on the top of the silo and the outer wall of the ventilation duct, so that the outer wall of the ventilation duct and the surface of the silo form a continuous and uninterrupted overall waterproof layer. The continuous laying of the insulation layer improves the insulation capacity and continuous waterproof capacity of the top of the silo and the outer wall of the ventilation duct. The wire mesh and the leveling layer form a uniform base layer on the surface of the silo, preventing stress concentration during the laying of the waterproof membrane. The waterproof mortar layer can effectively improve the waterproof capacity of the outer wall of the ventilation duct and avoid the formation of weak waterproof areas such as cold joints around the ventilation duct due to changes in the pouring materials. It realizes the integrated laying of the waterproof layer of the silo top and the ventilation duct, making the waterproof system continuous and dense, thereby further improving the waterproof capacity of the ventilation duct area. Attached Figure Description

[0018] Figure 1 This is a construction detail diagram after the formwork is erected according to the present invention; Figure 2 for Figure 1 A magnified view of a section at point A in the middle; Figure 3 This is a node diagram after the completion of the construction of this invention; Figure 4 for Figure 3 A magnified view of a section at point C; Figure 5 for Figure 3 A magnified view of a section at point B.

[0019] Attached reference numerals: 1. Silo top; 2. Ventilation duct; 3. Inner mold sleeve; 4. Outer mold sleeve; 5. Outer mold pad; 6. Flange ring; 7. Waterproof paving structure; 8. Sealing ring seat; 9. Sealant; 10. Protective aluminum plate; 11. Rubber pad; 12. Embedded anchor bar; 13. Connecting bar; 101. Bottom mold; 102. Silo top frame; 201. Duct frame; 202. Waterproof platform; 301. Mold piece; 302. Inner disc; 303. Rope; 304. Rope groove; 601. Outer edge plate; 701. Insulation layer; 702. Wire mesh; 703. Leveling layer; 704. Waterproof mortar layer; 705. Waterproof membrane. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: This embodiment aims to provide a waterproof construction method for ventilation holes on the roof of grain warehouses, which is mainly used for the construction of ventilation holes on the roof of grain warehouses and addresses the problem that the existing pouring process for ventilation holes on the roof of grain warehouses is prone to water leakage.

[0021] A method for waterproofing a ventilation hole in a warehouse roof includes the following construction steps: S100: One mold for the top of the warehouse; like Figure 1 First, the bottom formwork 101 is laid on the existing support system, then the formwork is reinforced and the standard is checked. The formwork surface is coated with release agent, and the gaps in the formwork are sealed to ensure no grout leakage. Ventilation holes that match the inner diameter of the ventilation channel 2 are opened on the bottom formwork 101.

[0022] After completing the bottom formwork 101, the silo roof frame 102 is tied to the bottom formwork 101 according to the design drawings, and is lapped or anchored to the main reinforcement and stirrups of the surrounding structure. Construction space is reserved on the silo roof frame 101 for ventilation ducts 2.

[0023] S200: Two ventilation duct supports; After the bottom formwork 101 is erected and the reinforcing bars are tied, the formwork at the ventilation hole location is installed. First, the inner formwork sleeve 3 is inserted and fixed into the ventilation hole, ensuring a tight connection between the inner formwork sleeve 3 and the bottom formwork. In this embodiment, as... Figure 1 The inner mold sleeve 3 includes several continuously circumferentially arranged mold pieces 301, and each mold piece 301 is spliced ​​together along the circumference to form a sleeve structure; an inner disc 302 is attached to the inner surface of the sleeve structure to form internal support; and ropes 303 are tied to the outer surface of the sleeve structure to attach and fix each mold piece 301 to the outer circle of the inner disc 302.

[0024] The mold plate 301 has a rope groove 304 for accommodating the rope 303. The rope groove 304 corresponds to the inner disc 302 and is arranged in two sets at intervals. One set is located in the area covered by the flange ring 6, and the other set is located below the bottom mold 101. This ensures the stability of the circumferential stress structure of the inner mold sleeve 3, and the rope 303 and rope groove 304 do not affect the pouring of the inner wall of the ventilation channel 2. A temporary support structure can be set at the bottom of the inner mold sleeve 3 to ensure the stability of the inner mold sleeve 3 structure. During the later demolding, the inner disc 302 can be removed first to release the internal support of the mold plate 301, then the mold plates 301 can be removed one by one, and finally the rope 303 can be removed.

[0025] After installing the inner mold sleeve 3, the duct frame 201 is then tied to the top frame 102. The duct frame 201 is arranged around the inner mold sleeve 3, and an insertion gap is maintained between the upper part of the duct frame 201 and the inner mold sleeve 3 to facilitate the subsequent insertion of the flange ring 6. A concrete pad can be tied between the middle part of the duct frame 201 and the inner mold sleeve 3 to maintain the insertion gap.

[0026] Finally, an outer mold sleeve 4 is fitted onto the duct skeleton 201 to form the duct casting cavity. The outer mold sleeve 4 is a metal sleeve with two halves spliced ​​together. The bottom of the outer mold sleeve 4 has a bottom edge ring parallel to the top of the silo 1. The bottom edge ring is fixedly connected to the top skeleton 102 through the outer mold pad 5. The outer mold pad 5 is arranged at intervals around the circumference so that the duct casting cavity is connected to the casting area of ​​the top of the silo 1. This allows the waterproof platform 202 and the top of the silo 1 to be cast together in one pour to form a continuous structure, avoiding the formation of cold joints at the joint between the ventilation duct 2 and the top of the silo 1.

[0027] S300: One-time pouring; After the formwork system and reinforcing steel cage have passed inspection, the first concrete pouring is carried out. Concrete for the top of the sump 1 is poured on the bottom formwork 101 until the top surface of the top concrete is flush with the lower surface of the bottom edge ring of the outer formwork sleeve 4. At the same time, concrete is poured into the duct pouring cavity to form the waterproof platform 202. During pouring, the concrete slump must be controlled, and the distribution spacing of the concrete pads can be controlled simultaneously to ensure that the upper surface of the waterproof platform 202 is higher than the top of the sump 1. It is necessary to ensure that the water-facing surface of the waterproof platform 202 is 20-30cm higher than the top of the sump.

[0028] S400: Install flange ring 6; After the initial setting of the first pour, the lower part of the flange ring 6 is inserted into the insertion gap between the duct frame 201 and the inner mold sleeve 3, so that the flange ring 6 is fitted on the inner mold sleeve 3. The flange ring 6 is mainly used to provide an installation foundation for subsequent ventilation equipment.

[0029] In this embodiment, as Figure 2In step S200, a connecting rib 13 is circumferentially welded to the duct skeleton 201. One end of the connecting rib 13 is bent and located at the bottom of the insertion slit and vertically upward. An outer edge plate 601 is provided at the bottom of the flange ring 6. The outer edge plate 601 has an alignment hole corresponding to the position of the connecting rib 13. One end of the connecting rib 13 extends upward and is inserted and fixed in the alignment hole. The position is fixed by electric welding or nuts, so as to fix the position of the flange ring 6, improve the alignment efficiency and anti-buoyancy ability.

[0030] S500: Secondary pouring; Using the same grade of concrete as the first pour, and controlling the slump to be greater than that of the first pour, a second pour is carried out in the duct pouring cavity to form a complete ventilation duct 2, and the lower part of the flange ring 6 is pre-embedded and fixed.

[0031] S600: Complete demolding; After final setting, remove the inner mold sleeve 3, outer mold sleeve 4 and bottom mold 101 in sequence.

[0032] It also includes step S700: setting up the waterproof paving structure 7; like Figure 3 and Figure 5 The waterproof paving structure 7 includes an insulation layer 701, a wire mesh 702, a leveling layer 703, a waterproof mortar layer 704, and a waterproof membrane 705.

[0033] The insulation layer 701 is continuously laid on the outer wall of the warehouse roof 1 and the ventilation duct 2 to improve the insulation capacity and continuous waterproofing capacity of the warehouse roof 1 and the outer wall of the ventilation duct 2. The area of ​​the insulation layer 701 on the warehouse roof 1 is covered with a wire mesh 702, and a leveling layer 703 is laid on the wire mesh 702 to form a uniform base layer on the surface of the warehouse roof 1, preventing stress concentration when the waterproof membrane 705 is laid. The pre-embedded anchor bars 12 embedded in the warehouse roof 1 extend upward through the insulation layer 701 and are tied and fixed to the wire mesh 702.

[0034] A waterproof mortar layer 704 is laid in the area of ​​the ventilation duct 2 within the insulation layer 701. The waterproof mortar layer 704 effectively improves the waterproofing capability of the outer wall of the ventilation duct 2, preventing weak waterproofing areas such as cold joints from forming around the ventilation duct 2 due to changes in the pouring materials, and strengthening the waterproofing capability of the side walls of the ventilation duct 2. A waterproof membrane 705 is continuously laid on the leveling layer 703 and the waterproof mortar layer 704 to ensure the waterproofing integrity of the connection between the silo roof 1 and the ventilation duct 2.

[0035] like Figure 4 A sealing ring seat 8 is fixedly fitted on the flange ring 6. The sealing ring seat 8 is located above the ventilation channel 2. The upper end of the waterproof membrane 705 extends upward to the lower end of the sealing ring seat 8 and is fixedly connected to the sealing ring seat 8 with sealant 9 to treat the end of the waterproof membrane 705 and prevent moisture from seeping in from the end.

[0036] A protective aluminum plate 10 is fixedly fitted onto the flange ring 6. The protective aluminum plate 10 is a downwardly expanding cone shape to cover the sealing ring seat 8 and the entire ventilation channel 2. An annular rubber gasket 11 is placed between the protective aluminum plate 10 and the flange ring 6. The rubber gasket 11 is located on the upper surface of the sealing ring seat 8 to further improve the waterproof sealing performance.

Claims

1. A method for waterproofing ventilation holes on warehouse roofs, characterized in that: The construction steps include the following: S100: Warehouse roof (1) formwork support; Erect a bottom formwork (101), and tie a silo roof frame (102) above the bottom formwork (101). Ventilation holes are opened or reserved on both the bottom formwork (101) and the silo roof (1) frame. S200: Ventilation duct (2) formwork support; First, insert and fix the inner mold sleeve (3) through the ventilation hole; Then, a channel frame (201) is tied to the top (1) frame. The channel frame (201) is set around the inner mold sleeve (3), and there is an insertion gap between the upper part of the channel frame (201) and the inner mold sleeve (3). Finally, an outer mold sleeve (4) is fitted onto the duct skeleton (201) to form a duct casting cavity. The bottom of the outer mold sleeve (4) is fixedly connected to the silo top (1) skeleton through the outer mold pad (5). The outer mold pad (5) is circumferentially spaced so that the duct casting cavity is connected to the casting area of ​​the silo top (1). S300: One-time pouring; Pour concrete on the top of the silo, and make the top surface of the concrete flush with the bottom of the outer formwork sleeve (4); At the same time, concrete is poured into the duct casting cavity to form a waterproof platform (202); The slump of the concrete must be controlled during pouring to ensure that the upper surface of the waterproof platform (202) is higher than the top of the slab (1); S400: Install flange ring (6); After the initial setting of the first pour, the lower part of the flange ring (6) is inserted into the insertion gap between the duct skeleton (201) and the inner mold sleeve (3); S5 00: Secondary pouring; Using concrete of the same grade as the first pour, and controlling the slump to be greater than that of the first pour, a second pour is carried out in the duct pouring cavity to form a complete ventilation duct (2), and the lower part of the flange ring (6) is pre-embedded and fixed. S600: Complete demolding; After final setting, remove the inner mold sleeve (3), outer mold sleeve (4) plate and bottom mold (101) in sequence.

2. The waterproofing construction method for ventilation holes on warehouse roofs according to claim 1, characterized in that: It also includes step S700: setting up a waterproof paving structure (7); The waterproof paving structure (7) includes an insulation layer (701), a wire mesh (702), a leveling layer (703), a waterproof mortar layer (704), and a waterproof membrane (705); The insulation layer (701) is continuously laid on the outer wall of the warehouse roof (1) and the ventilation duct (2); The insulation layer (701) is covered with a wire mesh (702) in the area of ​​the top of the warehouse (1), and a leveling layer (703) is laid on the wire mesh (702); The insulation layer (701) is covered with a waterproof mortar layer (704) in the area of ​​the ventilation duct (2); Waterproof membrane (705) is continuously laid on the leveling layer (703) and waterproof mortar layer (704).

3. The waterproofing construction method for ventilation holes on warehouse roofs according to claim 2, characterized in that: A sealing ring seat (8) is fixedly fitted on the flange ring (6). The sealing ring seat (8) is located above the ventilation channel (2). The upper end of the waterproof membrane (705) extends upward to the lower part of the sealing ring seat (8) and is fixedly connected to the sealing ring seat (8) with sealant (9).

4. The waterproofing construction method for ventilation holes on warehouse roofs according to claim 3, characterized in that: A protective aluminum plate (10) is fixedly fitted on the flange ring (6). The protective aluminum plate (10) is a downwardly expanding cone shape to cover the sealing ring seat (8) and the entire ventilation channel (2).

5. The waterproofing construction method for ventilation holes on warehouse roofs according to claim 4, characterized in that: An annular rubber pad (11) is provided between the protective aluminum plate (10) and the flange ring (6), and the rubber pad (11) is placed on the upper surface of the sealing ring seat (8).

6. A method for waterproofing the ventilation holes of a warehouse roof (1) according to any one of claims 2-5, characterized in that: An embedded anchor bar (12) is pre-embedded in the top of the silo (1), and the embedded anchor bar (12) is fixedly connected to the wire mesh (702).

7. A method for waterproofing ventilator holes on warehouse roofs according to any one of claims 1-5, characterized in that: The inner mold sleeve (3) includes several continuously circumferentially arranged mold pieces (301), and each mold piece (301) is spliced ​​together along the circumference to form a sleeve structure; An inner disc (302) is fitted onto the inner surface of the sleeve structure to form internal support; The outer surface of the sleeve structure is bound with ropes (303) to attach and fix each module (301) to the outer circle of the inner disc (302).

8. A waterproofing construction method for ventilation holes in a warehouse roof (1) according to claim 7, characterized in that: The template (301) has a rope groove (304) for accommodating the rope (303). The rope groove (304) corresponds to the position of the inner disc (302) and is provided in multiple sets at intervals.

9. A method for waterproofing the ventilation holes of a warehouse roof (1) according to any one of claims 1-5, characterized in that: The duct skeleton is circumferentially fixedly connected with a connecting rib (13), and the connecting rib (13) is fixedly connected to the bottom of the flange ring (6).

10. A method for waterproofing the ventilation holes of a warehouse roof (1) according to claim 9, characterized in that: The flange ring (6) is provided with an outer edge plate (601) at the bottom. The outer edge plate (601) has a corresponding alignment hole corresponding to the position of the connecting rib (13). One end of the connecting rib (13) extends upward and is inserted and fixed in the alignment hole.

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