Construction method beneficial to recycling rainwater on flat roof of small building

Abstract

The invention relates to the technical field of rainwater recycling, in particular to a construction method beneficial to recycling rainwater on flat roofs of small-sized buildings. The method comprises the following steps: S1, when the length direction of a roof is less than or equal to 2.5 m, adopting a single-side inclined design and constructing; and secondly, when the length direction of the roof is larger than 2.5 m, the symmetrical double-side inclined design is adopted, and construction is conducted. S2, under the first condition, the lowest position of the roof is constructed in a rain chain type drainage mode. Under the second condition, rain chain type drainage construction is conducted on one side in the length direction of the roof, and flow guide type drainage construction is conducted on the other side in the length direction of the roof. And S3, in case of the first situation, a black gravel water collecting system is arranged on the ground below the side of the rain chain. Under the second condition, a black gravel water collecting system is arranged on the ground below the side of the rain chain, and a collecting pool for collecting and guiding rainwater is arranged on the ground on the other side of the rain chain. The roof length is divided into two different construction conditions, the situation that the single-side drainage pressure is too large is prevented, subsequent rainwater recycling is facilitated, and more water saving and environmental protection are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of rainwater recycling, in particular to a construction method that is beneficial to rainwater recycling on a flat roof of a small building. Background Art

[0002] Sponge city is a new concept of urban rainwater management, which means that the city can adapt to environmental changes and deal with natural disasters caused by rainwater like a sponge. In the process of building a sponge city, flat-roof buildings, especially small buildings such as pavilions, civil air defense entrances and exits, garage entrances, etc., often lack matching rainwater drainage systems. This results in the inability to effectively guide the rainwater from the eaves, causing water accumulation on the roof, or directly washing away the scattered water or green space, causing scattered water damage, exposed soil on green space, gullies, etc., which seriously affects the surrounding landscape effect. At the same time, the existing rainwater drainage system often ignores the availability of this part of rainwater, resulting in the waste of rainwater resources. Summary of the invention

[0003] The present invention aims to solve the above-mentioned problem, thereby providing a construction method for improving rainwater utilization and facilitating rainwater recycling on flat roofs of small buildings.

[0004] The present invention solves the above-mentioned problem by adopting the following technical solution: A construction method for recycling rainwater on a flat roof of a small building, comprising the following steps: S1: According to the length of the roof, there are two different construction situations. In situation one, when the length of the roof is less than or equal to 2.5 meters, a single-side tilt design and construction is adopted.

[0005] Case 2: When the length of the roof is greater than 2.5 meters, a symmetrical double-sided tilted design and construction is adopted.

[0006] S2: In case 1, the lowest part of the roof is constructed with rain chain drainage.

[0007] In the second case, rain chain drainage construction is carried out on one side along the length of the roof, and diversion drainage construction is carried out on the other side.

[0008] S3: In case one, a black gravel water collection system is arranged on the ground below the rain chain side.

[0009] In case 2, a black gravel water collection system is arranged on the ground below the rain chain side, and a collection pool for collecting and diverting rainwater is arranged on the ground on the other side.

[0010] Compared with the prior art, the present invention adopting the above technical solution has the following outstanding features: There are two different construction conditions according to the length of the roof, to prevent the situation where the drainage pressure on one side is too high, to prevent the problem of no drainage on the roof of small buildings, to avoid the hidden danger of rust caused by water accumulation on the roof, while taking into account the beautiful appearance and will not affect the surrounding landscape effect; it is also convenient for the subsequent recycling of rainwater, which is more water-saving and environmentally friendly.

[0011] Preferably, a further technical solution of the present invention is: Furthermore, during the rain chain drainage construction, a first rain gutter is installed along the edge of the roof, a plurality of drain outlets are cut on the first rain gutter, the top end of the rain chain is installed at the drain outlet, and the bottom end of the rain chain is opposite to the black gravel water collection system.

[0012] Furthermore, the black gravel water collection system includes a black gravel layer at the top layer and a water storage tank at the bottom layer.

[0013] Furthermore, a grid and a sedimentation tank are provided between the black gravel layer and the water storage tank.

[0014] Furthermore, during the diversion drainage construction, a second rain gutter is installed along the edge of the roof, and a rain gutter and a rain pipe are installed at the bottom of the second rain gutter in sequence, and the bottom end of the rain pipe is opposite to the collection pool.

[0015] Furthermore, the drainage slope of the roof is between 2% and 3%. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of a double-side tilting structure according to an embodiment of the present invention; Figure 2 This is a schematic diagram of a single-side tilted structure according to an embodiment of the present invention; Marked in the figure: roof 1, rain chain 2, rainwater pipe 3, black gravel layer 4, collection pool 5, water storage tank 6. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with embodiments, the purpose of which is only to provide a better understanding of the content of the present invention. Therefore, the examples given do not limit the protection scope of the present invention.

[0018] A construction method for recycling rainwater on a flat roof of a small building, comprising the following steps: S1: According to the length of the roof 1, it is divided into two different construction situations, and the slope of the roof 1 is precisely designed and constructed. In the first situation, when the length of the roof 1 is less than or equal to 2.5 meters, a single-side tilt design and construction is adopted; in the second situation, when the length of the roof 1 is greater than 2.5 meters, a symmetrical double-side tilt design and construction is adopted, and the drainage slope of the roof 1 is between 2% and 3%. It can effectively avoid the problem of excessive drainage on one side, taking into account both the drainage efficiency and the stability and aesthetics of the roof 1 structure. Different tilt designs for roofs 1 of different lengths can ensure that rainwater can be discharged smoothly, reduce the possibility of water accumulation, and thus prevent hidden dangers such as rust caused by water accumulation.

[0019] S2: In case 1, the lowest part of the roof 1 is constructed with a rain chain drainage method. This design is simple and practical, and can ensure that rainwater is quickly discharged. At the same time, the rain chain drainage method is also decorative and can improve the aesthetics of the roof 1. In case 2, the rain chain drainage is constructed on one side along the length of the roof 1, and the diversion drainage is constructed on the other side. The drainage method combining the rain chain and diversion can distribute the drainage more evenly and avoid excessive drainage pressure on one side. At the same time, the diversion drainage method can more effectively guide rainwater to the designated collection area and improve the rainwater collection efficiency.

[0020] S3: In the first case, a black gravel water collection system is arranged on the ground below the rain chain side. The black gravel is not only decorative, but also can slow down the water flow through its permeability, so that impurities in the rainwater can be precipitated, thereby improving the cleanliness of the rainwater.

[0021] In the second case, a black gravel water collection system is arranged on the ground below the rain chain side, and a collection pool 5 for collecting and diverting rainwater is arranged on the ground on the other side.

[0022] Furthermore, during the rain chain drainage construction, a first rain gutter is installed along the edge of the roof, a plurality of drain outlets are cut on the first rain gutter, the top end of the rain chain 2 is installed at the drain outlet, and the bottom end of the rain chain 2 is opposite to the black gravel water collection system.

[0023] Furthermore, the black gravel water collection system includes a top black gravel layer 4 and a bottom water storage tank 6. A grille and a sedimentation tank are also arranged between the black gravel layer 4 and the water storage tank 6. The arrangement of the grille and the sedimentation tank can further filter impurities in the rainwater and ensure the quality of the collected rainwater.

[0024] Furthermore, during the diversion drainage construction, a second rain gutter is installed along the edge of the roof, and a rain gutter and a rain pipe 3 are sequentially installed at the bottom of the second rain gutter, and the bottom end of the rain pipe 3 is opposite to the collection pool 5.

[0025] Infiltration wells or infiltration pipes are installed around the water storage tank 6 and the collection tank 5 so that the filtered rainwater can infiltrate into the ground to replenish the groundwater.

[0026] According to the length of the roof 1, it is divided into two different construction conditions to prevent the situation where the drainage pressure on one side is too large, to prevent the problem of no drainage on the roof 11 of the small building, to avoid the hidden danger of rust caused by water accumulation on the roof 11, while taking into account the beautiful appearance and will not affect the surrounding landscape effect; and it is convenient for the subsequent recycling of rainwater, which is more water-saving and environmentally friendly. Combined with the concept of sponge city construction, the recycled rainwater system is combined with other urban infrastructure (such as green space irrigation, road cleaning, etc.) to realize the multi-functional utilization of rainwater.

[0027] The above description is only a preferred feasible embodiment of the present invention, and does not limit the scope of rights of the present invention. All equivalent changes made using the contents of the present specification and its drawings are included in the scope of rights of the present invention.

Claims

1. A construction method for rainwater recovery on a flat roof of a small building, characterized in that: The steps include: S1: There are two different construction situations according to the length of the roof. In situation 1, when the length of the roof is less than or equal to 2.5 meters, a single-side tilt design and construction is adopted; Case 2: When the length of the roof is greater than 2.5 meters, a symmetrical double-sided tilt design and construction is adopted; S2: In case 1, the lowest part of the roof is constructed using a rain chain drainage method; In case 2, rain chain drainage is carried out on one side along the length of the roof, and diversion drainage is carried out on the other side; S3: In case 1, a black gravel water collection system is arranged on the ground below the rain chain side; In case 2, a black gravel water collection system is arranged on the ground below the rain chain side, and a collection pool for collecting and diverting rainwater is arranged on the ground on the other side.

2. The construction method for rainwater recovery on flat roofs of small buildings according to claim 1 is characterized in that: During the rain chain drainage construction, the first rain gutter is installed along the edge of the roof, and several drain outlets are cut on the first rain gutter. The top of the rain chain is installed at the drain outlet, and the bottom of the rain chain is opposite to the black gravel water collection system.

3. The construction method for rainwater recovery on flat roofs of small buildings according to claim 1 is characterized in that: The black gravel water collection system consists of a top layer of black gravel and a bottom layer of water storage tanks.

4. The construction method for rainwater recovery on flat roofs of small buildings according to claim 3 is characterized in that: There are also screens and sedimentation tanks between the black gravel layer and the water storage tank.

5. The construction method for rainwater recovery on flat roofs of small buildings according to claim 1 is characterized in that: During the diversion drainage construction, a second rain gutter is installed along the edge of the roof, and a rain gutter and a rain pipe are installed at the bottom of the second rain gutter in sequence, with the bottom end of the rain pipe facing the collection pool.

6. The construction method for rainwater recovery on flat roofs of small buildings according to claim 1 is characterized in that: The drainage slope of the roof is between 2% and 3%.

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