Buffer structure for connecting elevated rainwater downpipe

Abstract

The utility model relates to the field of elevated road construction, in particular to a buffer structure for connecting an elevated rainwater downpipe. The buffer structure aims at solving the problem that rainwater of the elevated downpipe in sponge city construction washes and damages the concave greenbelt. A buffer structure used for being connected with an elevated rainwater downpipe comprises the elevated downpipe, a first buffer pool, a second buffer pool, a third buffer pool, a first buffer pool water outlet, a first curve speed reduction structure, a first curve speed reduction structure water outlet, a second buffer pool water outlet, a second curve speed reduction structure and a second curve speed reduction structure water outlet. Compared with a traditional downpipe buffering structure, the device is simple in structure, construction and maintenance, the three-layer buffering pool structure can effectively reduce the flow speed and impact force of elevated falling water, the effect of rainwater initial purification and filtration can be achieved, the survival rate and durability of vegetation and soil of the downward concave greenbelt are improved, and the service life of the downward concave greenbelt is prolonged. And urbanization and sponge city construction are facilitated.

Description

Technical Field

[0001] The utility model relates to the field of elevated road construction, in particular to a buffer structure for connecting elevated rainwater downpipes. Background Art

[0002] In recent years, with the rapid development of urbanization in my country, many cities have started the construction of elevated expressways to ease urban road traffic congestion. At the same time, according to the requirements of sponge city construction, the green space under the elevated road is built as a sunken green space and bioretention facilities to retain, store, purify and reuse rainwater. However, due to the large water collection area, large water flow and impact force of the elevated downpipe, it is easy to cause scouring and damage to the ground of the sunken green space. Therefore, it is very necessary to invent a buffer structure for the connection between the elevated road downpipe and the sunken green space to support urbanization development and sponge city construction. Utility Model Content

[0003] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a buffer structure for connecting elevated road downpipes and sunken green spaces in urban elevated road construction, which can effectively solve the problem of scouring and damage of sunken green spaces by rainwater from elevated downpipes in sponge city construction.

[0004] The technical solution of the utility model is: a buffer structure for connecting an elevated rainwater downpipe, comprising an elevated downpipe, a first buffer tank, a second buffer tank, a third buffer tank, a first buffer tank drain outlet, a first curve speed reduction structure, a first curve speed reduction structure drain outlet, a second buffer tank drain outlet, a second curve speed reduction structure, a second curve speed reduction structure drain outlet, a third buffer tank drain outlet, a third curve speed reduction structure and a third curve speed reduction structure drain outlet; the buffer tank and the curve speed reduction structure are made of cement concrete and are both provided with drain outlets; the buffer structure is provided with a three-layer waterfall structure, a circular drain outlet is provided at the bottom of the first buffer tank outlet to connect to the second buffer tank, a circular drain hole is provided at the second buffer tank outlet to connect to the third buffer tank, and a grille-shaped drain hole is provided in the third buffer tank to discharge into a sunken green space; the water storage and water discharge capacities of the three buffer tanks meet the local 10-year rainstorm conditions.

[0005] Preferably, the height of each buffer pool is 15 cm, the area is determined according to the water collection area, the rainstorm intensity formula and the drainage rate, and the material is a concrete structure with a strength of not less than C20.

[0006] Preferably, large pebbles and a curved speed reduction structure are provided in the buffer pool. The curved speed reduction structure is a cement concrete structure with the same height as the buffer pool structure and a thickness of 3-5 cm. A drainage outlet is provided at the bottom.

[0007] Preferably, the buffer pool is filled with large pebbles in a pattern of larger at the top and smaller at the bottom. The diameter of the large pebbles in the first buffer pool is 3-5 cm, the diameter of the medium pebbles in the second buffer pool is 1-3 cm, and medium-coarse sand is arranged in the third buffer pool.

[0008] Preferably, high-impact rainwater flowing out of the elevated downpipe is gradually decelerated through three layers of buffer tanks, the water outlet height of the elevated downpipe is less than 10 cm from the top surface of the first buffer tank, and the first buffer tank and the second buffer tank use circular drain outlets with slower water outlet speeds.

[0009] Preferably, the third buffer tank adopts a grille drain outlet with a relatively uniform water outlet speed, and the height of the drain outlet is the same as the top of the buffer tank of the next layer.

[0010] Beneficial effects of the utility model:

[0011] Compared with traditional downpipe buffer structures, this facility has a simple structure and is simple to construct and maintain. The three-layer buffer pool structure can effectively reduce the flow rate and impact force of overhead water, and can play a role in the initial purification and filtration of rainwater, thereby improving the survival rate and durability of vegetation and soil in sunken green spaces, and helping urbanization and sponge city construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a cross-sectional layout diagram of the utility model;

[0013] Figure 2 It is a plan layout diagram of the utility model.

[0014] Explanation of the accompanying drawings: 1. First buffer tank; 2. Second buffer tank; 3. Third buffer tank; 4. Elevated downpipe; 11. Drain outlet of first buffer tank; 12. First curve speed reduction structure; 13. Drain outlet of first curve speed reduction structure; 14. Large-grained pebbles 14; 21. Drain outlet of second buffer tank; 22. Second curve speed reduction structure; 23. Drain outlet of second curve speed reduction structure; 24. Medium-grained pebbles; 31. Drain outlet of third buffer tank; 32. Third curve speed reduction structure; 33. Drain outlet of third curve speed reduction structure; 34. Medium-coarse sand. DETAILED DESCRIPTION

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0016] See also Figure 1-2The utility model provides an embodiment: a buffer structure for connecting an elevated rainwater downpipe, comprising an elevated downpipe 4, a first buffer pool 1, a second buffer pool 2, a third buffer pool 3, a first buffer pool drain outlet 11, a first curve speed reduction structure 12, a first curve speed reduction structure drain outlet 13, a second buffer pool drain outlet 21, a second curve speed reduction structure 22, a second curve speed reduction structure drain outlet 23, a third buffer pool drain outlet 31, a third curve speed reduction structure 32 and a third curve speed reduction structure drain outlet 33, the buffer structure is a three-layer curve speed reduction and waterfall structure, wherein the buffer pool is a concrete structure, and large pebbles 14 are arranged in the buffer pool to reduce the flow rate of rainwater and slow down the splashing of rainwater; a circular drain outlet is arranged at the bottom of the outlet of the first buffer pool 1 to connect to the second buffer pool 2, and a circular drain hole is arranged at the outlet of the second buffer pool 2 to connect to the third buffer pool 3; the third buffer pool 3 is provided with a grid-shaped drain hole to discharge into a sunken green space; the water storage and water discharge capacity of the three buffer pools meet the local 10-year rainstorm conditions.

[0017] In this embodiment, the height of each buffer pool is 15 cm, and the area is determined according to the water collection area, the rainstorm intensity formula and the drainage speed. The material is a concrete structure with a strength of not less than C20. Large pebbles 14 and a curved speed reduction structure are provided in the buffer pool. The curved speed reduction structure is a cement concrete structure with the same height as the buffer pool structure and a thickness of 3-5 cm. A drainage outlet is provided at the bottom.

[0018] In this embodiment, large pebbles 14 fill the buffer tank in a pattern of larger at the top and smaller at the bottom. The diameter of the large pebbles 14 in the first buffer tank 1 is 3-5 cm, the diameter of the medium pebbles 24 in the second buffer tank 2 is 1-3 cm, and medium-coarse sand 34 is arranged in the third buffer tank 3. The high-impact rainwater flowing out of the elevated downpipe 4 is gradually decelerated through the three-layer buffer tank. The water outlet height of the elevated downpipe 4 is less than 10 cm from the top surface of the first buffer tank 1. The first buffer tank and the second buffer tank 2 adopt a circular drain outlet with a slower water outlet speed, and the third buffer tank 3 adopts a grille drain outlet with a more uniform water outlet speed. The height of the drain outlet is the same as the top of the next layer of buffer tank.

[0019] During operation, the facility has a simple structure, simple construction and maintenance. The three-layer buffer pool structure can effectively reduce the flow rate and impact force of water falling from the elevated area, and can play the role of initial purification and filtration of rainwater, improve the survival rate and durability of vegetation and soil in the sunken green space, and help urbanization and sponge city construction.

[0020] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. A buffer structure for connecting an elevated rainwater downpipe, comprising an elevated downpipe, a first buffer pool, a second buffer pool, a third buffer pool, a first buffer pool outlet, a first curve speed reduction structure, a first curve speed reduction structure outlet, a second buffer pool outlet, a second curve speed reduction structure, a second curve speed reduction structure outlet, a third buffer pool outlet, a third curve speed reduction structure and a third curve speed reduction structure outlet, characterized in that: The buffer structure is a three-layer curved speed reduction and waterfall structure, in which the buffer pool is a concrete structure. Large pebbles are arranged in the buffer pool to reduce the flow rate of rainwater and slow down the splashing of rainwater. A circular drain outlet is arranged at the bottom of the outlet of the first buffer pool to connect to the second buffer pool. A circular drain hole is arranged at the outlet of the second buffer pool to connect to the third buffer pool. The third buffer pool is provided with a grid-shaped drain hole to discharge into the sunken green space.

2. A buffer structure for connecting an elevated rainwater downpipe according to claim 1, characterized in that: The height of each buffer pool is 15cm, and the area is determined based on the water collection area, rainstorm intensity formula and drainage rate. The material is concrete structure with a strength of not less than C20.

3. A buffer structure for connecting an elevated rainwater downpipe according to claim 1, characterized in that: Large pebbles and a curved speed reduction structure are provided in the buffer pool. The curved speed reduction structure is a cement concrete structure with the same height as the buffer pool structure and a thickness of 3-5cm. A drainage outlet is provided at the bottom.

4. A buffer structure for connecting an elevated rainwater downpipe according to claim 1, characterized in that: The buffer pool is filled with large pebbles in a pattern of larger at the top and smaller at the bottom. The diameter of the large pebbles in the first buffer pool is 3-5 cm, the diameter of the medium pebbles in the second buffer pool is 1-3 cm, and medium-coarse sand is set in the third buffer pool.

5. A buffer structure for connecting an elevated rainwater downpipe according to claim 1, characterized in that: The water outlet height of the elevated downpipe is less than 10 cm from the top surface of the first buffer tank, and the first buffer tank and the second buffer tank adopt circular drain outlets with slower water outlet speed.

6. A buffer structure for connecting an elevated rainwater downpipe according to claim 1, characterized in that: The third buffer tank adopts a grille drain with a relatively uniform water discharge speed, and the height of the drain is the same as the top of the buffer tank on the next layer.

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