CN106835972A - A kind of rain-water accumulating system of sponge-type ecology bridge - Google Patents

Abstract

The invention discloses a rainwater storage system for a sponge-type ecological bridge, comprising a drainage ditch, a first drainage structure, a greening tank, a filtering structure, a water storage tank and a pumping device; the drainage channel communicates with the greening tank through the first drainage structure The rainwater collected in the drainage ditch flows into the greening tank through the first drainage structure; the rainwater in the greening tank flows through the filtering structure, and then is discharged into the water storage tank through the second drainage structure; the pumping device is arranged in the water storage tank. The invention realizes the functions of collecting, storing, purifying and reusing rainwater on the bridge deck, and simultaneously effectively combines the green ecological design method with the gray infrastructure.

Description

A rainwater storage system for a sponge-type ecological bridge

technical field

The invention belongs to the technical field of bridge engineering, and in particular relates to a rainwater storage system of a sponge-type ecological bridge with the functions of rainwater purification, storage and reuse.

Background technique

With the proposal of the concept of sponge city, the Ministry of Housing and Urban-Rural Development requires the construction of a sponge city with natural accumulation, natural infiltration, and natural purification. Therefore, innovatively applying the concept of sponge city to bridge deck landscape greening and bridge deck drainage auxiliary facilities can improve rainwater resources. efficient management. As an important manifestation of urban roads, bridges play a pivotal role in the connection of urban areas, but bridges are also important carriers of surface runoff, and are areas where pollutants such as vehicle fuel, dust haze, and exhaust gas are concentrated. During heavy rain, the initial rainwater is likely to carry pollutants on the bridge deck and collect under the bridge, causing pollution to the embankment under the bridge and seriously affecting the landscape effect under the bridge. As the fortress of urban transportation, it is of great significance to realize the "sponge city" by giving full play to the role of bridges in absorbing, storing, purifying and reusing rainwater.

At present, the drainage of the bridge deck mainly adopts the engineering mode of "drainage". Firstly, the rainwater is diverted and collected through the setting of the vertical and horizontal slopes of the bridge deck, and then the rainwater is connected to the drainage pipes embedded in the bridge body and piers. Introduce rainwater into the municipal pipe network under the bridge or the surrounding natural water body. Although this design method can achieve the purpose of rapid drainage of the bridge, it does not consider the storage and reuse of rainwater, which will easily cause excessive pressure on the drainage system under the bridge, and it will easily cause the risk of backwater during heavy rain seasons, and the traditional bridge deck drainage does not The treatment of runoff pollution is not considered, and the source pollution control cannot be realized.

Contents of the invention

In view of the above problems, the present invention proposes a rainwater storage system for sponge-type ecological bridges, which realizes the functions of bridge deck rainwater collection, storage, purification, and reuse, and at the same time effectively combines green ecological design methods with gray infrastructure . It is mainly realized through the following technical solutions:

A rainwater storage system for a sponge-type ecological bridge, including a drainage ditch, a first drainage structure, a greening tank, a filtering structure, a water storage tank and a pumping device; the drainage channel communicates with the greening tank through the first drainage structure, and the drainage channel The collected rainwater flows into the greening tank through the first drainage structure; the rainwater in the greening tank flows through the filtering structure, and then is discharged into the water storage tank through the second drainage structure; the pumping device is arranged in the water storage tank.

As a further improvement of the present invention, the filter structure includes a water-permeable medium layer, a reverse filter layer, and a gravel layer arranged in sequence from top to bottom, for realizing natural osmotic purification.

As a further improvement of the present invention, the second drainage structure is a perforated water pipe, which is arranged at the bottom of the filter structure to receive the water permeated from the filter structure.

As a further improvement of the present invention, the second drainage structure is located in the gravel layer for draining rainwater at the bottom of the greening tank.

As a further improvement of the present invention, the soil permeability of the permeable medium layer is not less than 100mm/hour, and is uniformly mixed with sand and planting soil, preferably 40% medium coarse sand, 40% planting soil and 20% coconut palm. Mixing, the content of organic matter meets the growth requirements of selected plants.

As a further improvement of the present invention, the first drainage structure includes at least one pipe.

As a further improvement of the present invention, a grid net cover and a rainwater grate cover are arranged on the top of the drainage ditch for intercepting sundries on the bridge deck.

As a further improvement of the present invention, a water outlet is provided on the top of the side of the greening tank near the water storage tank for introducing rainwater exceeding the standard in the greening tank into the water storage tank.

As a further improvement of the present invention, the pumping device is a water pump, and the water pump is also connected with a sprinkler head, and the purified rainwater in the storage tank is pumped out by the water pump, and the vegetation is watered through the sprinkler head.

As a further improvement of the present invention, an overflow pipe is provided on the top of the water storage tank, and the overflow pipe is connected to a vertical drain pipe to remove excess rainwater on the bridge deck in the later stage of rainfall (directly discharged to the bridge). The elevation of the overflow pipe must be below the level of the drain.

Beneficial effects of the present invention:

1. Setting up green tanks outside the guardrail can not only store bridge deck runoff rainwater, but also filter and purify bridge deck runoff pollution.

2. By setting perforated permeable pipes in the gravel layer at the bottom of the greening tank, rainwater can be drained and purified to infiltrate.

3. When the rainfall is large, the rainwater in the greening tank is discharged to the water storage tank through the outfall.

4. The purified rainwater in the water storage tank is drawn out by the water pump, and can be used for vegetation irrigation through the sprinkler head.

5. The water storage tank can temporarily store and retain rainwater. When the water level is higher than the overflow pipe of the water storage tank, the excess rainwater will be discharged through the overflow pipe.

Description of drawings

Fig. 1 is the rainwater storage system of a kind of sponge type ecological bridge of an embodiment of the present invention and the schematic diagram of bridge position;

Fig. 2 is the structural representation of the rainwater storage system of a kind of sponge type ecological bridge in Fig. 1;

Among them, 1 is the drainage ditch, 2 is the sprinkler head, 3 is the pumping device, 4 is the permeable medium layer, 5 is the reverse filter layer, 6 is the gravel layer, 7 is the second drainage structure, 8 is the overflow pipe, 9 is the first A drainage structure, 10 is a greening tank, 11 is a water storage tank, and 12 is a water outlet.

detailed description

In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

The application principle of the present invention will be described in detail below in conjunction with the accompanying drawings.

As shown in Figures 1 and 2, a rainwater storage system for a sponge-type ecological bridge is arranged on the outside of the guardrail of the bridge, including a drainage ditch 1, a first drainage structure 9, a greening tank 10, a filtering structure, a water storage tank 11 and pumping Device 3; the drainage ditch 1 communicates with the greening groove 10 through the first drainage structure 9, and the rainwater collected in the drainage ditch 1 flows into the greening groove 10 through the first drainage structure 9; the rainwater in the greening groove 10 flows through the filter structure , discharged into the water storage tank 11 through the second drainage structure 7; the pumping device 3 is arranged in the water storage tank 11, and is used for irrigating vegetation in dry weather.

In one embodiment of the present invention, the filter structure includes a water-permeable medium layer 4 , a reverse filter layer 5 , and a gravel layer 6 arranged in sequence from top to bottom, for realizing natural osmotic purification.

In one embodiment of the present invention, the second drainage structure 7 is a perforated water pipe, which is arranged at the bottom of the filter structure to receive the water seeped from the filter structure.

In one embodiment of the present invention, the second drainage structure 7 is located in the gravel layer 6 for draining rainwater at the bottom of the greening tank 10 .

In one embodiment of the present invention, the reverse filter layer 5 adopts gravel with a particle size of 5-15 mm.

In one embodiment of the present invention, the soil permeability of the permeable medium layer 4 is not less than 100mm/hour, and the sand and planting soil are evenly mixed, preferably 40% medium coarse sand, 40% planting soil and 20% % Coconut is evenly mixed, and the organic matter content meets the growth requirements of selected plants.

In one embodiment of the present invention, the first drainage structure 9 includes at least one pipe.

In one embodiment of the present invention, the top of the drainage ditch 1 is provided with a grill net cover and a rainwater grate cover for intercepting sundries on the bridge deck.

In one embodiment of the present invention, a water outlet 12 is provided on the top of the green tank 10 near the water storage tank 11 for introducing excess rainwater in the green tank 10 into the water storage tank 11 .

As a further improvement of the present invention, the pumping device 3 is a water pump, and the water pump is also connected with a sprinkler head 2. After the purified rainwater in the water storage tank 11 is pumped out by the water pump, the vegetation is watered through the sprinkler head 2.

As a further improvement of the present invention, an overflow pipe 8 is provided on the top of the water storage tank 11, and the overflow pipe is connected to a vertical drain pipe for eliminating excessive rainwater on the bridge deck in the later stage of rainfall (directly discharged to the bridge), and the overflow pipe 8 The elevation must be lower than the 12 elevation of the outfall.

In summary:

During the rainy season, the rainwater on the bridge deck flows into the drainage ditch 1, and is discharged to the green tank 10 through the pipeline 9, then passes through the permeable medium layer 4, the reverse filter layer 5, and the gravel layer 6 for natural infiltration and purification, and passes through the perforated permeable pipe in the gravel layer 6. 7 is discharged into the water storage tank 11. During rainstorm weather, excessive rainwater in the greening tank 10 overflows to the water storage tank 11 through the water outlet 12 . When it is sunny, the purified rainwater stored in the water storage tank 11 can be extracted by the water pump 3 for irrigation of bridge deck vegetation.

The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above-mentioned embodiments, and what described in the above-mentioned embodiments and the description only illustrates the principles of the present invention, and the present invention will also have other functions without departing from the spirit and scope of the present invention. Variations and improvements all fall within the scope of the claimed invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (10)

1. the rain-water accumulating system of a kind of sponge-type ecology bridge, it is characterised in that：Including gutter, the first flow guiding structure, green Change groove, filtration, catch basin and water plug；The gutter is connected by the first flow guiding structure with greening groove, gutter In the rainwater that collects greening groove is flowed into by the first flow guiding structure；After the rainwater of the greening groove flows through filtration, by Two flow guiding structures enter catch basin；The water plug is in catch basin.

2. the rain-water accumulating system of a kind of sponge-type ecology bridge according to claim 1, it is characterised in that：The filtering Structure includes the permeable dielectric layer, loaded filter, the gravel layer that are sequentially arranged from top to bottom, for realizing that naturally osmotic is purified.

3. the rain-water accumulating system of a kind of sponge-type ecology bridge according to claim 2, it is characterised in that：Described second Flow guiding structure is perforation water-permeable pipe, and the water for getting off is permeated in its bottom for being located at filtration in undertaking filtration.

4. the rain-water accumulating system of a kind of sponge-type ecology bridge according to claim 3, it is characterised in that：Described second Flow guiding structure is located in gravel layer, for excluding greening trench bottom rainwater.

5. the rain-water accumulating system of a kind of sponge-type ecology bridge according to claim 1, it is characterised in that：It is described permeable The soil permeability of dielectric layer is not less than 100mm/ hours, by sand and the uniform mix of planting soil.

6. the rain-water accumulating system of a kind of sponge-type ecology bridge according to claim 1 and 2, it is characterised in that：It is described First flow guiding structure includes at least one pipeline.

7. the rain-water accumulating system of a kind of sponge-type ecology bridge according to claim 1, it is characterised in that：The draining Ditch top sets grille mesh cover and rain grid capping, for intercepting bridge floor debris.

8. the rain-water accumulating system of a kind of sponge-type ecology bridge according to claim 1, it is characterised in that：The greening Groove sets discharge opening near the side roof part of catch basin one, for rainwater exceeded in greening groove to be incorporated into catch basin.

9. the rain-water accumulating system of a kind of sponge-type ecology bridge according to claim 1, it is characterised in that：It is described to draw water Device is suction pump, and suction pump is also associated with sprinkler tip, catch basin after the rainwater for purifying is through pumped of drawing water, passes through Sprinkler tip pours vegetation.

10. the rain-water accumulating system of a kind of sponge-type ecology bridge according to claim 1, it is characterised in that：The storage Sink top sets overflow pipe, and overflow pipe is connected with vertical drainage pipe, for excluding the rainfall later stage exceeded rainwater of bridge floor, overflows The elevation in flow tube road must be less than discharge opening elevation.