Leakage-proof installation structure for exhaust passage out of roof

Abstract

The utility model discloses an exhaust passage out-of-roof anti-leakage installation structure which comprises an exhaust passage pre-buried section of an out-of-roof part and exhaust passage post-installation sections below the exhaust passage pre-buried section, the exhaust passage pre-buried section is arranged in a reserved hole in the inner side of an exhaust shaft of a top-layer top plate in a penetrating mode and fixed to the top-layer top plate through a floor post-pouring section, and the exhaust passage post-installation sections are arranged in the reserved hole in the inner side of the exhaust shaft of the top-layer top plate in a penetrating mode. The exhaust passage embedded section is connected with the first exhaust passage post-loading section below the exhaust passage embedded section in an abutting mode and is in sealed connection with the exhaust passage post-loading section through a pipe section connecting material, and a gap between the first exhaust passage post-loading section and the second exhaust passage post-loading section below the exhaust passage embedded section is in sealed connection through a mortar difference adjusting layer poured at the position of a top-layer bottom plate. And the top end of the second exhaust passage post-loading section below the exhaust passage pre-buried section is fixed with the top layer bottom plate through the floor post-pouring section. The device is simple in structure and convenient to construct, ensures the construction of the part, going out of the roof, of the exhaust passage in advance while ensuring the post-process construction of the roof, effectively shortens the construction period, and completely eradicates the leakage hidden danger of the position, going out of the roof, of the exhaust passage.

Description

Technical Field

[0001] This utility model relates to the field of waterproof construction technology for the part of the exhaust duct that exits the roof, specifically to a leak-proof installation structure for the exhaust duct that exits the roof. Background Technology

[0002] Preventing roof leaks is a key and challenging aspect of building construction management. Residential and apartment projects often have numerous roof ventilation shafts, and leaks from these shafts can severely damage the building's functionality. Common weak points for roof ventilation shaft leaks include installation gaps between the ventilation shaft cap and the ventilation duct structure, construction joints at the roof's internal corners, and gaps at the connection between the ventilation duct and the ventilation shaft. Traditional construction methods generally fall into two categories. One involves installing the ventilation duct, then casting concrete to seal the gap between the ventilation duct and the floor slab, before constructing the roof ventilation shaft structure. The other involves constructing the ventilation shaft structure first, then installing the ventilation duct, and finally constructing the formwork. The former prolongs the overall process, hindering schedule management and increasing the risk of leaks at the construction joints between the shaft and the floor slab. The latter presents difficulties in installing and sealing the ventilation duct after the ventilation shaft construction is completed, compromising quality control. Moreover, since the top-floor exhaust duct runs through the top floor slab and extends into the exhaust well, and the exhaust duct is set up along the entire length of the top floor, the formwork erection in the above two operation methods is often quite difficult. The suspended formwork method requires penetrating the structural floor slab, which poses a high risk of leakage at the penetration point. The bottom-supported formwork method has the problem of a large workload in scaffolding erection, which squeezes the construction space of the floors below and is easily affected by other work processes on the floors below. Utility Model Content

[0003] The purpose of this utility model is to propose a leak-proof installation structure for exhaust ducts exiting the roof, so as to solve the technical problems described in the background art.

[0004] To achieve the above technical objectives, the present invention adopts the following technical solution:

[0005] A roof-mounted waterproofing structure for an exhaust duct includes a pre-embedded section of the exhaust duct extending above the roof and several post-installed sections of the exhaust duct below the pre-embedded section. The pre-embedded section is installed inside a pre-reserved hole in the exhaust well of the top floor slab and is fixed to the top floor slab via a post-cast section of the floor slab. The pre-embedded section abuts against the first post-installed section of the exhaust duct below it and is sealed by pipe connection material. The gap between the first and second post-installed sections of the exhaust duct below the pre-embedded section is sealed by a mortar adjustment layer poured at the bottom of the top floor slab. The top of the second post-installed section of the exhaust duct below the pre-embedded section is fixed to the bottom of the top floor slab via a post-cast section of the floor slab.

[0006] Preferably, the length of the pre-embedded section of the exhaust duct below the top slab is not less than 90mm and not more than 150mm, and the length of the pre-embedded section of the exhaust duct above the top slab is between 100-150mm.

[0007] Preferably, the pipe segment connection material is a structure with internal fiberglass mesh cloth and external cement mortar, and the top of the pipe segment connection material extends to the post-cast section of the top floor slab.

[0008] Preferably, a concrete curb is poured around the exhaust duct section of the top floor slab, and the concrete curb is integrally cast with the mortar adjustment layer and the floor slab section.

[0009] Preferably, the pre-embedded section of the exhaust duct is made by secondary cutting of the remaining small sections of material after the prefabricated exhaust duct has been cut as a whole, taking into account the floor height modulus.

[0010] Preferably, the venting well includes a pre-cast section and a post-cast section. The pre-cast section is integrally cast with the top slab, and the joint between the pre-cast section and the post-cast section is located above the height of the roof waterproofing layer.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] 1. This utility model has a simple structure and is easy to construct. During the roof pouring construction, the exhaust well is poured to the height above the roof waterproof layer in one go. Furthermore, through the ingenious setting of the pre-embedded section of the exhaust duct, the installation of the exhaust duct exiting the roof is completed during the structural construction stage. This avoids leaving the roof construction joint in an unfavorable position and ensures that the construction of the exhaust duct exiting the roof can be inserted in advance while the subsequent roof construction is carried out, effectively shortening the construction period.

[0013] 2. This utility model sets up a shorter pre-embedded section of the exhaust duct at the point where it exits the roof. Based on this, the construction of the exhaust duct at the roof is carried out by means of suspended formwork. The suspension cable is cleverly placed in the cavity of the pre-embedded section of the exhaust duct, which effectively avoids the risk of leakage at the penetration point caused by the conventional suspended formwork method that requires penetrating the structural floor slab. This ensures the quality of the project construction. In addition, it also reserves sufficient operating space for the suspended formwork construction and the construction of other processes on the floors below, and avoids the problem of the various processes encroaching on each other's construction space. Attached Figure Description

[0014] The above and / or other aspects and advantages of this invention will become clearer and more readily understood through the following detailed description taken in conjunction with the accompanying drawings, which are merely illustrative and do not limit the invention, wherein:

[0015] Fig. 1This is a schematic diagram of the roof waterproofing installation structure of the exhaust duct of this utility model at the top floor slab.

[0016] Fig. 2 This is a schematic diagram of the roof waterproofing installation structure of the exhaust duct of this utility model at the top floor slab.

[0017] Fig. 3 This is a schematic diagram of the structure of the pre-embedded section of the exhaust duct involved in this utility model when installed by a lifting formwork system.

[0018] Attached reference numerals: 1. Pre-embedded section of exhaust duct; 2. Post-installed section of exhaust duct; 3. Top floor slab; 4. Exhaust shaft; 401. Pre-cast section of exhaust shaft; 402. Post-cast section of exhaust shaft; 5. Top floor slab; 6. Post-cast section of floor slab; 7. Pipe connection material; 8. Mortar adjustment layer; 9. Support reinforcement; 10. Concrete curb; 11. Hanging formwork system. Detailed Implementation

[0019] In the following description, an embodiment of the exhaust duct roof waterproofing installation structure of this utility model will be described with reference to the accompanying drawings. The embodiments described herein are specific implementations of this utility model, used to illustrate the concept of this utility model, and are illustrative and exemplary, and should not be construed as limiting the implementation or scope of this utility model. In addition to the embodiments described herein, those skilled in the art can employ other obvious technical solutions based on the content disclosed in the claims and specification of this application. These technical solutions include those that make any obvious substitutions and modifications to the embodiments described herein.

[0020] In the description of this utility model, it should be noted that the terms "front," "rear," "left," "right," "top," "bottom," "upper," "lower," "inner," "outer," "horizontal," "vertical," "upright," and "oblique," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] The accompanying drawings in this specification are schematic diagrams used to illustrate the concept of this utility model, and schematically show the shapes of the various parts and their interrelationships. Please note that, in order to clearly show the structure of the components of the embodiments of this utility model, the drawings are not drawn to the same scale. The same reference numerals are used to indicate the same parts.

[0022] The principles and features of this utility model are described below with reference to the accompanying drawings. The embodiments described are only for explaining this utility model and are not intended to limit the scope of this utility model. The following description, in conjunction with... Figs. 1-3 The preferred embodiments of this utility model will be described in further detail below:

[0023] like Figs. 1-2 As shown, the preferred embodiment of this utility model is a roof-mounted anti-leakage installation structure for an exhaust duct, comprising an exhaust duct pre-embedded section 1 extending out of the roof and exhaust duct post-installed sections 2 below the exhaust duct pre-embedded section 1. The exhaust duct pre-embedded section 1 is inserted into a reserved hole inside the exhaust well 4 of the top floor slab 3 and fixed to the top floor slab 3 via a floor slab post-cast section 6. The exhaust duct pre-embedded section 1 abuts against the first exhaust duct post-installed section 2 below it and is sealed and connected by a pipe section connecting material 7. The gap between the first and second exhaust duct post-installed sections 2 below the exhaust duct pre-embedded section 1 is sealed and connected by a mortar adjustment layer 8 poured at the position of the top floor slab 5. The top of the second exhaust duct post-installed section 2 below the exhaust duct pre-embedded section 1 is fixed to the top floor slab 5 via the floor slab post-cast section 6.

[0024] In some preferred embodiments, in order to prevent leakage at weak points between the exhaust well 4 and the top slab 3, and to further improve the anti-leakage effect at the point where the prefabricated exhaust duct exits the roof, the exhaust well 4 includes a pre-cast section 401 and a post-cast section 402. The pre-cast section 401 is integrally cast with the top slab 3, and the joint between the pre-cast section 401 and the post-cast section 402 is located above the height of the roof waterproofing layer.

[0025] Because a separate small section of the exhaust duct pre-embedded section 1 is added, the exhaust duct pre-embedded section 1 can be inserted into the construction in advance by means of the formwork system 11. Moreover, the middle cavity of the exhaust duct pre-embedded section 1 also provides space for the lifting slings of the formwork system 11 to pass through, avoiding the problem that the lifting slings must pass through the post-cast section 6 of the floor slab in the conventional construction process. On this basis, considering the overlap between the exhaust duct pre-embedded section 1 and the exhaust duct post-installed section 2 below, the length of the exhaust duct pre-embedded section 1 below the top floor slab 3 is not less than 90mm. At the same time, considering the construction stability of the entire formwork system 11 and the thickness of the top floor slab 3, it is necessary to limit its self-weight while ensuring that the exhaust duct pre-embedded section 1 has a certain length. Therefore, the length of the exhaust duct pre-embedded section 1 above the top floor slab 3 is between 100-150mm, and the length of the exhaust duct pre-embedded section 1 below the top floor slab 3 is not greater than 150mm.

[0026] Meanwhile, to ensure the smooth installation of the first exhaust duct re-installation section 2 below the pre-embedded exhaust duct section 1, gaps will inevitably appear between the re-installation section 2 and the top floor slab 5, as well as between the first and second re-installation sections 2 below the pre-embedded exhaust duct section 1, after the pre-embedded exhaust duct section 1 and the re-installation section 2. To ensure the airtightness of the exhaust duct, a mortar adjustment layer 8 of the cast-in-place structure is used for sealing. The mortar adjustment layer 8 of the cast-in-place structure can effectively absorb installation errors, ensuring a sealed connection while accommodating gaps at different heights. To meet sealing requirements, the mortar adjustment layer 8 is poured by sealing the gaps with mesh or caulking material before applying fine stone concrete plaster. This avoids the problem of fine stone concrete flowing into the pipe cavity and crowding the pipe cavity space, which would reduce the effective flow rate. At the same time, in order to further improve the sealing performance of the mortar adjustment layer 8 and prevent leakage at the joints, a concrete curb 10 can be poured around the exhaust duct section 2 of the top floor slab 5. The concrete curb 10, the mortar adjustment layer 8, and the floor slab section 6 are cast as a single unit.

[0027] Of course, for cost reduction and environmental protection considerations, the pre-embedded section 1 of the exhaust duct is made by secondary cutting of the remaining small sections of material after the prefabricated exhaust duct is cut and processed as a whole, taking into account the floor height module, so as to make full use of construction waste and turn waste into treasure.

[0028] The specific construction process of this utility model is as follows.

[0029] Step 1: The top slab 3 and the pre-cast section 401 of the exhaust well at the bottom of the exhaust well 4 are poured simultaneously. The top slab 3 of the inner part of the pre-cast section 401 of the exhaust well is not poured temporarily as a reserved hole for installing the prefabricated exhaust duct.

[0030] Step two, as Fig. 3 As shown, the pre-embedded section 1 of the prefabricated exhaust duct is assembled with the formwork system 11, and the pre-embedded section 1 of the exhaust duct is fixed to the reserved hole by means of formwork by the formwork system 11. The lifting cable part of the formwork system 11 passes through the cavity of the pre-embedded section 1 of the exhaust duct and is fixed to the top of the pre-cast section 401 of the exhaust well.

[0031] Step 3: Pour micro-expansion concrete into the reserved hole between the top floor slab 3 and the pre-embedded section 1 of the exhaust duct to form the post-cast section 6 of the floor slab, and fix the pre-embedded section 1 of the exhaust duct to the top floor slab 3 through the post-cast section 6 of the floor slab.

[0032] Step 4: After the post-cast section 6 of the floor slab reaches the design strength, remove the formwork system 11;

[0033] Step 5: Construct the exhaust well post-exhaust well section 402 above the pre-exhaust well section 401, and install the exhaust duct post-installation section 2 from bottom to top to the top floor slab 5.

[0034] Step 6: Move the first section of the exhaust duct rear section 2 below the pre-embedded section 1 into place and temporarily fix it with the support steel bar 9 set at the reserved hole of the top floor slab 5;

[0035] Step 7: Use pipe section connection material 7 to seal the joint between the pre-embedded section 1 of the exhaust duct and the post-installed section 2 of the exhaust duct. Pipe section connection material 7 is generally made of fiberglass mesh cloth and 8-12mm thick cement mortar. It should be noted that the top of pipe section connection material 7 extends to the post-cast section 6 of the top floor slab 3.

[0036] Step 8: Hang wire mesh or fill the gap between the two exhaust duct sections 2 at the top floor slab 5 with caulking material. Then set up the formwork and pour fine stone concrete to form the floor slab post-cast section 6, mortar adjustment layer 8 and concrete backsplash 10 as a whole.

[0037] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A leak-proof installation structure for an exhaust duct exiting a roof, characterized in that: The exhaust duct includes a pre-embedded section (1) of the exhaust duct extending out of the roof and each section of the exhaust duct after-installed section (2) below the pre-embedded section (1). The pre-embedded section (1) of the exhaust duct is installed in the reserved hole inside the exhaust well (4) of the top floor slab (3) and is fixed to the top floor slab (3) through the floor slab after-cast section (6). The pre-embedded section (1) of the exhaust duct abuts against the first section of the exhaust duct after-installed section (2) below it and is sealed by the pipe section connecting material (7). The gap between the first and second sections of the exhaust duct after-installed section (2) below the pre-embedded section (1) of the exhaust duct is sealed by the mortar adjustment layer (8) poured at the position of the top floor slab (5). The top of the second section of the exhaust duct after-installed section (2) below the pre-embedded section (1) of the exhaust duct is fixed to the top floor slab (5) through the floor slab after-cast section (6).

2. The roof waterproofing installation structure for an exhaust duct as described in claim 1, characterized in that: The length of the pre-embedded section (1) of the exhaust duct below the top plate (3) is not less than 90mm and not more than 150mm, and the length of the pre-embedded section (1) of the exhaust duct above the top plate (3) is between 100-150mm.

3. The roof waterproofing installation structure for an exhaust duct as described in claim 1, characterized in that: The pipe section connecting material (7) is a structure with internal fiberglass mesh cloth and external cement mortar, and the top of the pipe section connecting material (7) extends to the post-cast section (6) of the top floor slab (3).

4. The roof waterproofing installation structure for an exhaust duct as described in claim 1, characterized in that: The top floor slab (5) has a concrete curb (10) poured around the exhaust duct post-installation section (2), and the concrete curb (10) is integrally cast with the mortar adjustment layer (8) and the floor slab post-installation section (6).

5. The roof waterproofing installation structure for an exhaust duct according to claim 1, characterized in that: The pre-embedded section (1) of the exhaust duct is made by cutting the remaining small section of material after the prefabricated exhaust duct is cut as a whole, taking into account the floor height modulus.

6. The roof waterproofing installation structure for an exhaust duct according to claim 1, characterized in that: The exhaust well (4) includes a pre-cast section (401) and a post-cast section (402). The pre-cast section (401) is integrally cast with the top slab (3), and the joint between the pre-cast section (401) and the post-cast section (402) is located above the height of the roof waterproofing layer.

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