CN104141346B - Combined rainwater infiltration tree pond - Google Patents

Abstract

The present invention relates to urban rainwater to control to utilize technical field, particularly relate to a kind of Combined rainwater diafiltration tree pond.This tree pond comprises forebay (19), and forebay (19) have isolated abandoned stream room (4) and mud chamber (5); Tree pond also comprises the water inlet (2) be selectively communicated with described abandoned stream room (4) or described mud chamber (5) fluid, wherein, spaced apart by dividing plate (20) between described abandoned stream room (4) and mud chamber (5), the bottom of described water inlet (2) is higher than the end face of described dividing plate (20).Tree pond of the present invention can carry out cutting dirt, purification and reducing discharging to urban road, square runoff rainwater.

Description

Combined rainwater infiltration tree pond

technical field

The invention relates to the technical field of urban rainwater control and utilization, in particular to a combined rainwater infiltration tree pond.

Background technique

The development of urbanization has greatly changed the original hydrological cycle. Many cities have experienced serious waterlogging and urban groundwater levels have dropped sharply. At the same time, urban road runoff rainwater has brought serious water environmental pollution problems. Urban water The ecology has seriously deteriorated.

In response to hydrological changes and water pollution brought about by urbanization, bioretention zones and infiltration tree ponds are suitable for the control and utilization of runoff rainwater from roads and squares. Bioretention zone technology is currently being promoted in Beijing, Shenzhen and other domestic cities application. However, in practical engineering applications, the layout of the bioretention zone is limited by the site. Urban branch roads and secondary arterial roads often do not have separate green belts that can be used to build rainwater control and utilization facilities, and only have intermittent street tree green belts. In addition, deicing agents are widely used in northern cities in winter, and the melted snow water with deicing agents will cause huge damage to plants. Most foreign percolation tree ponds adopt a box-type structure with a bottom. Due to space constraints, only small trees or shrubs can be planted, and the tree species in the tree pond cannot play the role of street trees in shading.

Contents of the invention

The purpose of the present invention is to provide a combined rainwater infiltration tree pond for intercepting pollution and reducing discharge of runoff rainwater from urban roads and squares, so that it can efficiently operate around the clock according to seasonal changes, greatly reduce maintenance and management costs, and improve its efficiency. Water purification ability and applicability.

In order to achieve the above object, the present invention provides a combined rainwater filtration tree pond, comprising: a forebay, the forebay has a separate abandonment chamber and a settling chamber; A water inlet; wherein, the discarding flow chamber and the sedimentation chamber are separated by a partition, and the bottom of the water inlet is higher than the top surface of the partition.

According to the present invention, it also includes: a flap that can fluidly communicate the water inlet with the discard chamber at the first position, and connect the water inlet with the sedimentation chamber at the second position, wherein the flap can communicate with the second fluid at the first position. Rotationally fixed between positions in the forebay.

According to the present invention, the jettison chamber and the sedimentation chamber are arranged side by side along a direction parallel to the bottom of the forebay; the flap is located on the top of the jettison chamber.

According to the present invention, it also includes: a grid embedded in the water inlet.

According to the present invention, it also includes: at least one planting pond in fluid communication with the settling chamber.

According to the present invention, the combined rainwater infiltration tree pond includes two planting ponds, the two planting ponds are arranged on the same side of the forebay along the direction away from the forebay, and the forebay and the two planting ponds are fluidly connected in sequence along the direction away from the forebay ; Wherein, the front pool and the adjacent planting pool are separated by the first partition wall; and the space enclosed by the top wall of the first partition wall and the side wall of the combined rainwater infiltration tree pool constitutes the realization of the planting pool A channel in fluid communication with the settling chamber.

According to the present invention, it also includes: at least one emptying pipe arranged on the bottom side wall of the sedimentation tank, the emptying pipe has an inlet and an outlet; the inlet of the emptying pipe is fluidly connected to the sedimentation chamber, and the outlet of the emptying pipe is fluidly connected to Planted pond adjacent to forecourt.

According to the present invention, it also includes: at least one overflow purification pond located between two planting ponds and in fluid communication with it; wherein, the overflow purification pond and the adjacent planting pond are separated by a second partition wall; and The space enclosed by the top wall of the second partition wall and the side walls of the combined rainwater infiltration tree pool constitutes a channel for fluid communication between the overflow purification pool and the adjacent planting pool.

According to the present invention, it also includes: a water distribution gabion, filled with crushed stones; the water distribution gabion is arranged in the overflow purification pond adjacent to the planting pond of the two planting ponds, and adjacent to the second partition wall .

According to the present invention, the combined rainwater infiltration tree pond includes at least two overflow purification ponds, and at least two overflow purification ponds are arranged in sequence along the direction away from the forebay; wherein, the fluid in the adjacent two overflow purification ponds connected and separated by a third partition.

According to the present invention, along the direction away from the forebay, the heights of the bottom surfaces of at least two flow-through purification tanks decrease successively.

According to the present invention, there are at least two overflow purification pools, the height of the third partition wall is the same as that of the second partition wall on the side close to the front pool, and the third partition wall is higher than the height of the second partition wall on the side away from the front pool. The height of the second partition wall.

According to the present invention, there is provided a communication pipe penetrating through the bottom of the third partition wall, so as to realize the fluid communication between the two adjacent overflow purification pools.

According to the present invention, each overflow purification tank is filled with a purification medium composed of slag, sand and soil.

According to the present invention, the bark covering layer is set in the planting pond and the overcurrent purification pond, the upper surface of the bark covering layer positioned in the planting pond constitutes the bottom surface of the planting pond, and the upper surface of the bark covering layer positioned in the overcurrent purification pond The bottom surface of the overcurrent purification pool is formed; the bottom surfaces of the planting pool and the overflow purification pool are lower than the bottom of the water inlet.

According to the present invention, the bottoms of the planting pool and the overcurrent purification pool are hollow structures.

According to the present invention, it also includes: a multi-stage overflow port arranged in the planting pond far away from the forebay among the two planting ponds, wherein the bottom overflow port of the multi-stage overflow port is higher than the bottom surface of the planting pond, and the multi-stage overflow The top of the inlet is lower than the bottom of the inlet.

According to the present invention, it also includes: a drainage pipe having an inlet and an outlet; wherein, the inlet of the drainage pipe is connected to the bottom of the multi-stage overflow port, and the outlet of the drainage pipe is connected to the urban drainage pipeline system.

According to the present invention, it also includes: a jettison tube having an inlet and an outlet; wherein, the inlet of the jettison tube is located at the bottom of the side wall of the jettison chamber and is in fluid communication with the jettison chamber, and the outlet of the jettison tube is connected to the multi-stage overflow port fluid communication.

According to the present invention, the forebay, the planting pond, the overcurrent purification pond and the multi-stage overflow port are integral parts formed by concrete cast-in-place.

According to the present invention, it further includes: a diversion block arranged outside the water inlet, and the upper surface of the diversion block is set as a slope inclined toward the water inlet.

According to the present invention, a seepage pipe is arranged at the bottom of the combined rainwater infiltration tree pond.

Compared with the prior art, the beneficial effects of the present invention are:

The combined rainwater infiltration tree pond of the present invention comprises a forebay, and the forebay has a spaced abandonment chamber and a sedimentation chamber and a water inlet optionally in fluid communication with the abandonment chamber or the sedimentation chamber, and the water inlet is higher than the forebay The bottom of the pool. During the application of the combined rainwater infiltration tree pond, the rain and snow runoff is collected at the water inlet and then flows into the forebay. Therefore, the combined rainwater infiltration tree pond of the present invention can effectively intercept the initial runoff of the catchment surface. Specifically, on the one hand, when the combined rainwater infiltration tree pond is used in northern cities in winter, since the deicing agent will enter with the snow water and damage the plants, the operator can open the flap (that is, connect the water inlet and the waste flow chamber through the flap). Connected), the snow water containing the deicing agent is introduced into the abandonment flow chamber, thereby preventing the deicing agent from invading the plants in the combined rainwater infiltration tree pond. On the other hand, when the combined rainwater infiltration tree pond is used in the rainy season, the operator can close the flap (that is, the water inlet is connected to the sedimentation chamber through the flap), at this time the discarding chamber is closed, and the runoff rainwater directly enters the sedimentation chamber .

The combined rainwater infiltration tree pond of the present invention has at least one overflow purification pond located between two planting ponds and in fluid communication with it, and can efficiently purify runoff rainwater through horizontal underflow purification, expanding the original structure of the combined rainwater infiltration tree pond. There is a wide range of applications, so the invention can be widely used in the field of urban runoff rainwater pollution control.

In the combined rainwater infiltration tree pond of the present invention, a multi-stage overflow port is provided in the planting pond far away from the forebay among the two planting ponds, which can control the internal runoff overflow speed of the combined rainwater infiltration tree pond under different water inlet conditions and water storage depth, so the application range of the combined rainwater infiltration tree pond of the present invention is expanded, and the retention and purification time for large flow runoff rainwater can be improved under the premise of ensuring the health of plants in the combined rainwater infiltration tree pond.

The bottom of the combined rainwater infiltration tree pool is provided with seepage and drainage pipes, which can discharge the super seepage runoff after over-current purification treatment, shorten the water accumulation time in the combined rainwater infiltration tree pool, and thus ensure the healthy growth of plants.

Since the forebay, the planting pond, the overflow purification pond and the multi-stage overflow outlet of the combined rainwater infiltration tree pond of the present invention are integrated parts of concrete cast-in-place, construction is convenient.

Description of drawings

Fig. 1 is the top view structural representation of an embodiment of the combined rainwater infiltration tree pond of the present invention;

Fig. 2 is a schematic cross-sectional view taken along line A-A in Fig. 1;

Fig. 3 is a schematic cross-sectional view taken along line B-B in Fig. 1;

Fig. 4 is a schematic cross-sectional view taken along line C-C in Fig. 1 .

detailed description

Embodiments of the present invention are described below with reference to the accompanying drawings, wherein the arrows in FIGS. 1 , 2 and 4 indicate the flow direction of runoff. In addition, the "high", "low", "top" and "bottom" involved in the present invention mean that when the combined rainwater infiltration tree pond is actually applied, the direction of gravity is directed from high to low, and from top to low. The direction of the bottom, in other words, the direction from top to bottom in FIG. 2 is the direction from high to low, and the direction from top to bottom.

Referring to Fig. 1 and Fig. 2, an embodiment of the combined rainwater infiltration tree pond of the present invention, for the convenience of description, the "combined rainwater infiltration tree pond" will be referred to as "tree pond" for short as follows. Including a forebay 19, the forebay 19 has a separated flow chamber 4 and a settling chamber 5, and a water inlet 2 optionally in fluid communication with the flow chamber 4 or the settling chamber 5, wherein the flow chamber 4 is connected to the settling chamber 5 are spaced apart by a partition 20, and the bottom of the water inlet 2 is higher than the top surface of the partition 20. Wherein, the water inlet 2 is a through hole that runs through the side wall of the tree pool horizontally or obliquely, and the bottom of the water inlet 2 is the lowest point of the inner wall of the through hole. And because the top surface of dividing plate 20 is lower than the top surface of the side wall of tree pond, so the top of the discarded flow chamber 4 that forms by the side wall of dividing plate 20 and tree pond and the settling chamber 5 is all lower than the top of tree pond. The top surface of the side wall, the top surface of the partition 20 defines the top of the discard chamber 4 and the sedimentation chamber 5 , in other words, the height of the top surface of the partition 20 is the same as the top of the discard chamber 4 and the sedimentation chamber 5 .

According to the above structure, during the application process of the tree pond, the runoff of rain and snow gathers at the water inlet 2 and then flows into the forebay 19 . Therefore, the tree pond of the present invention can effectively intercept the initial runoff of the catchment surface. Specifically, on the one hand, when the tree pond is used in northern cities in winter, since the deicing agent will enter with the snow water and damage the plants, the operator can open the flap 6 (that is, the water inlet 2 is communicated with the flow chamber 4 through the flap 6) ), the snow water containing the deicing agent is introduced into the abandonment flow chamber 4, thereby preventing the deicing agent from invading the plants in the tree pool. On the other hand, when using this tree pool in the rainy season, the operator can close the flap 6 (that is, the water inlet 2 is communicated with the sedimentation chamber 5 by the flap 6), and the flap 6 will completely cover the top of the discarded flow chamber 4 at this time. The discarded flow chamber 4 is closed, and the runoff rainwater directly enters the sedimentation chamber 5 . In addition, the tree pool can be set close to the edge of the road.

Specifically, the specific shape of the tree pool can be seen by referring to Fig. 1-Fig. 4 . But not limited to this. The tree pool of the present embodiment is a rectangular housing, including four side walls and partition walls (described in detail below), the bottom of the tree pool is a hollow structure, and the top does not have a top wall. In other words, the top of the tree pool is open. of. Wherein, the above-mentioned rectangular casing is divided into a plurality of chambers by the first partition wall 16 , the upstream second partition wall 211 , the third partition wall 22 , and the downstream second partition wall 212 . The space enclosed by the first partition wall 16 , the side wall of the rectangular housing and the bottom of the pool is the front pool 19 . The space enclosed by the upstream second partition wall 211 , the first partition wall 16 , the side walls of the rectangular casing, and the bottom of the pond is the upstream planting pond 91 . The space enclosed by the upstream second partition wall 211 , the third partition wall 22 , the side wall of the rectangular housing and the pool bottom is the upstream flow purification pool 101 . The space enclosed by the third partition wall 22 , the downstream second partition wall 212 , the side wall of the rectangular housing, and the pool bottom is the downstream flow purification pool 102 . The space enclosed by the second downstream partition wall 212 , the side wall of the rectangular casing and the bottom of the pond is the downstream planting pond 92 .

The structure of the tree pool of this embodiment is specifically described as follows.

Referring to FIG. 1 and FIG. 4 , the jettison chamber 4 and the sedimentation chamber 5 are arranged side by side along a direction parallel to the bottom of the forebay 19 . The water inlet 2 is arranged on the side wall of the tree pool close to the discarding flow chamber 4 and passes through the side wall. In the present embodiment, the partition 20 separates the discarding chamber 4 from the sedimentation chamber 5. In other words, the partition 20 and the side wall and the bottom surface of the forebay 19 form the separated discarding chamber 4 and the sedimentation chamber 5. The flow chamber 4 and the sedimentation chamber 5 are respectively located on both sides of the partition 20 . Wherein, the side wall and the bottom surface of the front pool 19 are respectively a part of the side wall and the bottom surface of the tree pool. Of course, a flat plate parallel to and spaced from the bottom of the tree pool can also be set in the front pool 19. The upper surface constitutes the bottom surface of the forebay 19 .

Further, a turnover plate 6 is provided on the top of the jettison chamber 4 . The turnover plate 6 is rotatably fixed in the front pool 19 between the first position and the second position, preferably, the turnover plate 6 is fixed in the front pool 19 by a rotating shaft fixed in the front pool 19, and the turnover plate 6 can be Rotate around this axis. Wherein, when the turning plate 6 is in the first position, the turning plate 6 is in the open position, the turning plate 6 blocks the communication between the water inlet 2 and the sedimentation chamber 5 and directly introduces the runoff flowing in from the water inlet 2 into the discarding flow chamber 4, That is to say, the water inlet 2 is in fluid communication with the jettison chamber 4 . Thus, during winter operation, the snowmelt water containing the deicing agent passes through the water inlet 2 and then directly enters the abandonment flow chamber 4 and is discharged through the abandonment flow pipe (described in detail later). When it is in the second position, that is, when the flap 6 is in the closed position, the flap 6 covers the top of the waste flow chamber 4, and connects the water inlet 2 with the sedimentation chamber 5. When running in the rainy season, the runoff rainwater passes through the flap 6 and is directly discharged The water inlet 2 leads into the sedimentation chamber 5 .

In this embodiment, the turnover plate 6 can be rotated between the first position and the second position to realize the selective fluid communication between the water inlet 2 and the discarding chamber 4 or the sedimentation chamber 5 . Of course, the present invention is not limited thereto. In other optional embodiments, methods known to those skilled in the art, such as valves, can be used to achieve selective fluid communication between the water inlet 2 and the discard chamber 4 or the sedimentation chamber 5 . In addition, the water inlet 2 can also be arranged on a part of the side wall of the tree pond that forms the sedimentation pond 5 , and the flap 6 is arranged on the top of the sedimentation pond 5 .

Preferably, the bottom of the water inlet 2 is 300-600 mm higher than the bottom surface of the forebay 19 . In this embodiment, the bottom surface of the forebay 19 is jointly formed by the bottom surface of the jettison chamber 4 and the sedimentation tank 5 .

Optionally, the water inlet 2 of the forebay 19 is provided with a grille 3, specifically, the grille 3 is embedded in the water inlet 2, which can prevent large garbage from entering the tree pond.

Referring to FIGS. 1 and 2 , the tree pond further includes at least one planting pond 9 in fluid communication with the settling chamber 5 . In this embodiment, the tree pool includes two planting pools 9, the two planting pools 9 are arranged on the same side of the front pool 19 along the direction away from the front pool 19, and the front pool 19 and the two planting pools 9 are arranged along the above-mentioned far away The directions are in turn fluidly connected. In other words, on the same side of the forebay, two planting ponds 9 are arranged in series in sequence, that is, the runoff in the forebay 19 enters one of the two planting ponds 9 for the first time, and then flows to the next planting pond through the planting pond. For the convenience of description, the planting pond close to the front pond 19 among the two planting ponds 9 is called the upstream planting pond 91, and the planting pond far away from the forebay 19 among the two planting ponds 9 is called the downstream planting pond 92, thus To express it more clearly, the runoff in the forebay 19 first flows into the upstream planting pond 91 , and then flows into the downstream planting pond 92 via the upstream planting pond 91 .

Continuing to refer to Fig. 1 and Fig. 2, forebay 19 and its adjacent planting pond 9 (that is, in this embodiment, the planting pond near the forebay 19 in the two planting ponds 9, i.e. the upstream planting pond 91) by the first The partition wall 16 separates, and the space enclosed by the top wall of the first partition wall 16 and the side wall of the tree pond constitutes a passage for realizing fluid communication between the upstream planting pond 91 and the sedimentation chamber 5 . It can be understood that the first partition wall 16 is the side wall of the sedimentation tank 5 , and the top wall of the first partition wall 16 is lower than the top surfaces of other side wall parts except the first partition wall 16 . Thus, after the runoff in the sedimentation tank 1 enters the sedimentation tank 1, the liquid level therein continues to rise, and when the liquid level is higher than the first partition wall 16, the runoff overflows from the first partition wall 16 into the upstream planting pond 91 . It can be understood that the runoff overflow channel is the space enclosed by the top wall of the first partition wall 16 and the side wall of the tree pool.

Preferably, the bottom of the planting pool 9 is 100-300mm lower than the bottom of the water inlet 2, so as to ensure a certain water storage space in the tree pool. More preferably, the bottom surface of the planting pool 9 is 200 mm lower than the bottom of the water inlet 2 . Wherein, when placing soil in the planting pool 9 for planting and cultivation, a bark layer (ie bark covering layer 18) is set on the soil layer, and the upper surface of the bark covering layer 18 is the bottom surface of the planting pool 9. It can be understood that at this time, the bottom of the planting pool 9 is the bottom of the planting pool 9 and separated from the tree pool. It is conceivable that after the person standing on the ground places soil in the planting pool 9 and arranges the bark covering layer 18 on the soil, the upper surface of the bark covering layer 18 can be seen. The bottom surface of the pool 9. Of course, it is not limited thereto, and it can be understood that the bottom surface of the planting pool 9 is the bottom surface of the space in the planting pool 9 where water can be stored.

The thickness of the bark covering layer 18 provided in the planting pond 9 is 50 mm, and pebbles are stacked at the junction of the planting pond 9 and the sedimentation chamber 5 to prevent water flow from eroding the planting soil layer 17 . In addition, the infiltrating rainwater of the planting pool 9 can recharge the groundwater, and the root system of the plants can also absorb the deep soil moisture in the dry season, reducing the water consumption for greening and watering. Furthermore, at least one emptying pipe 8 is provided on the bottom side wall of the sedimentation tank 5, each emptying pipe 8 having an inlet and an outlet. The inlet of each evacuation pipe 8 is in fluid communication with the settling chamber 5 , and the outlet of each evacuation pipe 8 is in fluid communication with the upstream plantation tank 91 . In this embodiment, the outlet of the emptying tube 8 is in fluid communication with the portion of the upstream planting pond 91 between the lower surface of the bark cover 18 and the bottom of the pond. Preferably, 3-5 emptying pipes 8 are provided, and the diameter of the emptying pipes 8 is 25-50mm. More preferably, the diameter of the emptying pipe 8 is 50mm. Thus, when operating in the rainy season, the flap 6 is closed to close the discarding chamber 4 (that is, the runoff is prohibited from entering the discarding chamber 4), and the runoff crosses the discarding chamber 4 and directly enters the sedimentation chamber 5. After the sedimentation chamber 5 settles, the overflow flows out. The front pond 19 enters the planting pond 9. After the rainfall ends, the rainwater remaining in the sedimentation tank 5 is discharged to the upstream planting tank 91 through the emptying pipe 8, so as to shorten the water accumulation time in the forebay and prevent mosquitoes from breeding.

Preferably, the bottom surface of the planting pond 9 is 50-100 mm lower than the top of the sedimentation pond 5 .

Further referring to FIG. 1 and FIG. 2 , the tree pool further includes at least one overflow purification pool 10 located between the two planting pools 9 , and the at least one overflow purification pool 10 is in fluid communication with the planting pool 9 . In this embodiment, the tree pool includes two overcurrent purification pools 10 , the two overcurrent purification pools 10 are arranged in sequence along the direction away from the forebay 19 , and the two overcurrent purification pools 10 are in fluid communication. In other words, one of the two flow-through purification ponds 10 is adjacent to and in direct fluid communication with the upstream plantation pond 91, and the other is adjacent to and in direct fluid communication with the downstream plantation pond 92, thereby overflowing from the forebay 19 to the upstream plantation pond The runoff of 91 flows into the downstream planting pond 92 after flowing through two overflow purification ponds 10 in sequence. For convenience of description, the overcurrent purification pool near the forebay 19 in the two overcurrent purification pools 10 is referred to as the upstream overcurrent purification pool 101, and the overcurrent purification pool far away from the forebay 19 among the two overcurrent purification pools 10 It is called the downstream over-current purification pool 102, so it can be expressed more clearly. The runoff overflowing from the forebay 19 to the upstream planting pool 91 flows through the upstream over-current purification pool 101 and the downstream over-current purification pool 102 in sequence, and then flows into 92 downstream planting ponds. Thus, the runoff that cannot be absorbed by the upstream planting pond 91 enters the upstream overflow purification pond 101 . In addition, along the direction away from the forebay 19, the heights of the bottom surfaces of the two flow-through purification tanks 10 decrease successively. In the present embodiment, the same as the planting pond, soil is placed in the two overcurrent purification ponds 10 for planting and cultivation, and the soil layer is covered with a bark covering layer, and the bark covering in the overcurrent purification pond 10 The upper surface of the layer constitutes the bottom surface of the flow-through purification basin 10 . Therefore, in this embodiment, the upper surface of the bark covering layer in the downstream flow purification pond 102 is lower than the upper surface of the bark covering layer in the upstream flow purification pond 101 .

Wherein, the overcurrent purification pool 10 and the adjacent planting pool 9 are spaced apart by the second partition wall 21, and the space formed by the top wall of the second partition wall 21 and the side wall of the tree pool is formed to realize A channel in fluid communication between the flow purification pond 10 and the adjacent plantation pond 9 . In this embodiment, that is, the upstream overcurrent purification pool 101 and the upstream planting pool 91 are separated by a second partition wall, and the downstream overcurrent purification pool 102 and the downstream planting pool 92 are separated by a second partition wall Separated, for the convenience of description, the second partition wall 21 that separates the upstream flow purification pool 101 and the upstream plantation pond 91 is called the upstream second partition wall 211, and the downstream flow purification pond 102 and the downstream plantation pond 92 will be separated The second partition wall is referred to as the downstream second partition wall 212 . In addition, the upstream flow purification pool 101 and the downstream flow purification pool 102 are separated by a third partition wall 22, and the bottom of the third partition wall 22 is provided with a through communication pipe 13 to realize the upstream flow purification pool. 101 and the fluid communication between the downstream flow purification pool 102. In this embodiment, the bottom of the third partition wall 22 is the part of the third partition wall 22 between the lower surface of the bark covering layer in the downstream flow purification pond 102 and the bottom of the tree pond. Of course, the two adjacent overcurrent purification ponds can also be connected in other ways, such as the top outflow method used for the fluid communication between the upstream planting pond 91 and the upstream overflow purification pond 101 .

It can be understood that the upstream second partition wall 211, the third partition wall 22 and the side wall of the tree pool are enclosed to form the upstream flow purification pool 101, and the downstream second partition wall 212, the third partition wall 22 and the side walls of the tree pool The wall encloses a downstream flow purification pool 102 . And the top wall of the upstream second partition wall 211 and the downstream second partition wall 212 are all lower than the top surface of the side wall of the tree pond, and the top wall of the upstream second partition wall 211 top wall and the downstream second partition wall 212 are respectively connected to the tree. The space enclosed by the side walls of the pool allows fluid to pass through. Thus, the runoff in the upstream planting pond 91 overflows into the upstream flow purification pond 101 through the space enclosed by the top wall of the upstream second partition wall 211 and the side wall of the tree pond, and the runoff in the downstream flow purification pond 102 The runoff overflows into the downstream planting pond 92 through the space enclosed by the top wall of the second downstream partition wall 212 and the side wall of the tree pond. In other words, the fluid communication between the upstream plantation pond 91 and the upstream overflow purification pond 101 , and the fluid communication between the downstream overflow purification pond 102 and the downstream plantation pond 92 are all realized by means of overflow.

Optionally, along the direction away from the forebay 19, the heights of the bottom surfaces of at least two over-current purification tanks 10 decrease in turn, and the bottom surfaces of the upstream over-current purification tank 101 and the downstream over-current purification tank 102 are respectively lower than the upstream second partition wall 211 and the height of the downstream second partition wall 212. The height of the third partition wall 22 and the second partition wall 21 (i.e. the upstream second partition wall 211) that is positioned at its side near the front pool 19 is the same, and the third partition wall 22 is higher than the second partition wall 22 that is positioned at its side away from the front pool 19. The height of the second partition wall 21 (ie, the downstream second partition wall 212).

Referring to Fig. 2, a water distribution gabion 12 is provided in the upstream flow purification tank 101 and adjacent to the upstream second partition wall 211, and the water distribution gabion 12 is filled with crushed stones. During the application process, runoff rainwater first enters the water distribution gabion 12 arranged in the upstream overflow purification tank 101 , and distributes water evenly through the water distribution gabion 12 . Afterwards, the rainwater enters the downstream overcurrent purification pool 102 through the connecting pipe 13 at the bottom of the third partition wall 22 in the form of horizontal underflow, and finally enters the downstream planting pool 92 from the downstream overflow purification pool 102 through top outflow. Thus, the overcurrent purification pond 10 efficiently purifies runoff rainwater through the horizontal underflow purification method, which expands the original application range of the tree pond, so the present invention can be widely used in the field of urban runoff rainwater pollution control.

Preferably, each overflow purification tank 10 is filled with a purification medium composed of slag, sand and soil. When the water flows through the filter material of the flow purification tank 10, the pollutants in the runoff are removed under the action of adsorption, filtration and other mechanisms.

In addition, not limited to the present invention, in other optional embodiments, one or more than two overflow purification pools 10 can be set, and the setting of equal to or more than two overflow purification pools 10 constitutes Classification settings, those skilled in the art can select the number of classifications according to different pollutant removal targets, and the filter material can be selected according to the requirements of influent water quality and effluent water quality.

Preferably, the bottom surface of each overflow purification tank 10 is lower than the bottom of the water inlet 2 .

In this embodiment, the bottoms of the planting pond 9 and the overcurrent purification pond 10 are both hollow structures. Therefore, the tree pool will not affect the vertical growth of plant roots in the tree pool, and the plant roots can use the water and nutrients in the deep soil, so that the tree pool of the present invention can be widely used in street tree green belts.

With reference to Fig. 1-Fig. 3, in the present embodiment, tree pond is also provided with multi-stage overflow port 11, and this multi-stage overflow port 11 is arranged in the downstream planting pond 92, and the bottom of multi-stage overflow port 11 overflows The mouth is higher than the bottom surface of the planting pond 9, and the top overflow mouth of the multi-stage overflow mouth 11 is lower than the bottom of the water inlet 2. In this embodiment, the multi-stage overflow port 11 can be understood as a cylindrical body, and the side wall of the cylindrical body is provided with a plurality of overflow ports, that is, the side wall overflow of the multi-stage overflow port 11 is formed. The outlets are arranged in stages, and the water passing area of the overflow outlet on the side wall decreases sequentially from top to bottom; a rainwater grate is arranged on the top of the multi-stage overflow outlet 11. Specifically, the multi-stage overflow port 11 is arranged adjacent to the side wall of the downstream planting pond 92 away from the forebay 19 , that is, it is arranged at the downstream end of the tree pond. Preferably, the bottom overflow of the multi-stage overflow 11 is 50-150 mm higher than the bottom surface of the tree pond, and the top overflow of the multi-stage overflow 11 is 100-200 mm lower than the bottom of the water inlet 2 . When the water in the tree pool is relatively shallow, the water flows through the bottom overflow port of the multi-stage overflow port 11 to discharge, and the overflow speed is limited at this time; when the water in the tree pool is deep, the water flows through the entire multi-stage overflow port to overflow 11 , the overflow capacity of the multi-stage overflow port 11 is not less than the water intake capacity of the water inlet 2 at this time. In this embodiment, the multi-stage overflow ports 11 are arranged in stages, the bottom overflow port has a small flow capacity, and the top overflow port has a large flow capacity. By vertically setting overflow ports with different flow capacities Control the overflow speed of the water flow, and then control the depth and residence time of the water in the tree pool. Furthermore, the tree pond of the present invention is provided with a water storage space and a multi-stage overflow port, so that the tree pond of the present invention can not only retain the initial runoff of infiltration, reduce the discharge of runoff, but also prevent excessive water accumulation from affecting the health of plants. In addition, a drain pipe 15 is also provided. The drainpipe 15 has an inlet and an outlet. The inlet of the drainpipe 15 is connected to the bottom of the multi-stage overflow port 11, and the outlet of the drainpipe 15 is connected to the urban drainage system. Excessive runoff is discharged through the drainpipe 15.

In addition, in this embodiment, the above-mentioned jettison tube 7 has an inlet and an outlet, and the inlet of the jettison tube 7 is located at the bottom side wall of the jettison chamber 4 and is in fluid communication with the jettison chamber 4. The outlet is in fluid communication with the multi-stage overflow port 11 . In this embodiment, the outlet of the discarding tube 7 is in fluid communication with the bottom of the multi-stage overflow port 11 . Through the air flow pipe 7 , the runoff in the discarding chamber 4 is discharged to the multi-stage overflow port 11 and then discharged to the tree pool through the drain pipe 15 . Of course, the present invention is not limited thereto. In other optional embodiments, for example, in the embodiment without the multi-stage overflow port 11, the discarding pipe 7 can be directly connected to the outside of the tree pond. That is to say, the discarding pipe 7 is connected to the outside of the tree pond to discharge the runoff in the discarding chamber 4 to the outside of the tree pond. The overflow port 11 communicates with the outside of the tree pond to discharge the runoff. also. Because the snowmelt process is slow, the snowmelt runoff is generally not very large, and the pipe diameter of the jettison pipe 7 can be selected as 50-150mm.

Optionally, a seepage pipe is provided at the bottom of the tree pool. The outer wall of the seepage pipe has small holes, and the rainwater that is not infiltrated in the future is collected and discharged to the multi-stage overflow port 11, shortening the water accumulation time of the tree pond, so the healthy growth of plants can be guaranteed.

Optionally, the forebay 19, the planting pond 9, the overflow purification pond 10 and the multi-stage overflow outlet 11 are integral parts cast in place by concrete, which is convenient for construction.

Further referring to FIG. 4 , a deflector block 1 is provided outside the water inlet 2 , and the upper surface of the deflector block 1 is set as a slope inclined toward the water inlet 2 so as to guide runoff into the water inlet 2 .

To sum up, in this embodiment, the bottoms of the pools inside the tree pool (the forebay 19 , the planting pool 9 , and the overcurrent purification pool 10 ) are all lower than the bottom of the water inlet 2 . In addition, the bottom of the forebay 19 is lower than the bottom of the water inlet 2, and the top of the forebay 19 is higher than the bottom of the planting pond 9, which has a pre-sedimentation effect on the runoff flowing into it, and can remove large particle pollutants in the runoff. To sum up, the snowmelt runoff enters the flow abandonment chamber 4 and is discharged from the tree pond through the flow abandonment pipe 7, thereby avoiding damage to plants. The runoff rainwater enters the tree pond forebay 19 after being intercepted by the grid 3, and overflows into the planting pond 9 after sedimentation and pretreatment in the forebay 19. The initial runoff infiltrates in the planting pond 9 to replenish groundwater, and later or larger The runoff overflows from the planting pond 9, and enters the overflow purification pond 10 after being evenly distributed by the water distribution gabion 12. After the rainwater is filtered and purified by the filter material in the overflow purification pond 10, it enters another planting pond. The excess runoff flows from the multi-stage overflow Flow port 11 overflows, discharges tree pool through drainpipe 8. Thus, the present invention is a combined percolation tree pond with the function of road rainwater interception and emission reduction.

Of course, the above is only a preferred embodiment of the present invention. In this embodiment, all the planting ponds 9 and the overflow purification ponds 10 are arranged in series on the same side of the forebay 19 . In other optional embodiments, multiple planting ponds 9 may be arranged on different sides of the forebay 19 in a network arrangement, and the flow purification ponds 10 may be arranged accordingly. Optionally, when the overcurrent purification pond 10 is located in the planting pond 9 and the forebay 19, they can also be arranged in parallel.

Among them, the fluid communication involved in the present invention includes direct fluid communication and indirect fluid communication. Adjacent to series relationship.

In summary, the specific shape of the tree pool can be seen from Figures 1 to 4. The shape thereof is specifically described below but not limited thereto. The tree pool is a rectangular shell surrounded by four side walls and the bottom of the pool. Wherein, the above-mentioned rectangular casing is divided into a plurality of chambers by the first partition wall 16 , the upstream second partition wall 211 , the third partition wall 22 , and the downstream second partition wall 212 . Specifically, the space enclosed by the first partition wall 16 , the side walls of the rectangular housing, and the bottom of the pool is the front pool 19 . The space enclosed by the upstream second partition wall 211 , the first partition wall 16 , the side walls of the rectangular casing, and the bottom of the pond is the upstream planting pond 91 . The space enclosed by the upstream second partition wall 211 , the third partition wall 22 , the side wall of the rectangular housing and the pool bottom is the upstream flow purification pool 101 . The space enclosed by the third partition wall 22 , the downstream second partition wall 212 , the side wall of the rectangular housing, and the pool bottom is the downstream flow purification pool 102 . The space enclosed by the second downstream partition wall 212 , the side wall of the rectangular casing and the bottom of the pond is the downstream planting pond 92 . Moreover, the bottom surfaces formed by the upper surface of the bark covering layer in the upstream planting pool 91 , the upstream flow-through purification pool 101 , the downstream second partition wall 212 , and the downstream planting pool 92 are lowered sequentially.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (18)

1. A combined rainwater infiltration tree pond is characterized in that, comprising: a forebay (19) having a separate discard chamber (4) and a settling chamber (5); and A water inlet (2) optionally in fluid communication with the discard chamber (4) or the sedimentation chamber (5); Wherein, the discarding chamber (4) and the settling chamber (5) are separated by a partition (20), and the bottom of the water inlet (2) is higher than the top surface of the partition (20); A flap capable of fluidly communicating the water inlet (2) with the discard chamber (4) in a first position, and fluidly communicating the water inlet (2) with the sedimentation chamber (5) in a second position (6), Wherein, the flap (6) is rotatably fixed in the forebay (19) between the first position and the second position. 2. The combined rainwater infiltration tree pond according to claim 1, characterized in that, The discarding chamber (4) and the sedimentation chamber (5) are arranged side by side along a direction parallel to the bottom of the forebay (19); The turnover plate (6) is located on the top of the flow discarding chamber (4). 3. The combined rainwater filtration tree pond according to claim 1, further comprising: A grill (3), the grill (3) is embedded in the water inlet (2). 4. The combined rainwater filtration tree pond according to claim 1, further comprising: At least one planting tank (9) in fluid communication with said settling chamber (5). 5. The combined rainwater filtration tree pond according to claim 4, characterized in that, The combined rainwater percolation tree pool includes two planting pools (9), The two planting ponds (9) are arranged on the same side of the forebay (19) along the direction away from the forebay (19), and the forebay (19) and the two planting ponds (9) ) are in sequential fluid communication along the direction away from; Wherein, the forebay (19) and its adjacent planting pond (9) are separated by a first partition wall (16); and The space enclosed by the top wall of the first partition wall (16) and the side wall of the combined rainwater infiltration tree pond constitutes a fluid communication between the planting pond (9) and the settling chamber (5). channel. 6. The combined rainwater filtration tree pond according to claim 5, further comprising: At least one emptying pipe (8) arranged on the bottom side wall of the precipitation chamber (5), the emptying pipe (8) having an inlet and an outlet; The inlet of the emptying pipe (8) is in fluid communication with the sedimentation chamber (5), and the outlet of the emptying pipe (8) is in fluid communication with the planting pond (9) adjacent to the forebay (19) . 7. The combined rainwater filtration tree pond according to claim 5, further comprising: at least one overflow purification pond (10) located between and in fluid communication with said two planting ponds (9); Wherein, the overcurrent purification pool (10) is separated from the adjacent planting pool (9) by a second partition wall (21); and The space enclosed by the top wall of the second partition wall (21) and the side walls of the combined rainwater infiltration tree pond constitutes the space for realizing the overcurrent purification pond (10) and the planting adjacent to it. The pool (9) is a channel in fluid communication. 8. The combined rainwater filtration tree pond according to claim 7, further comprising: A water distribution gabion (12), filled with gravel in the water distribution gabion (12); The water distribution gabion (12) is arranged in the overflow purification pond (10) adjacent to the planting pond (9) of the two planting ponds (9) close to the forebay (19), and adjacent to the first Two partition walls (21) are set. 9. The combined rainwater filtration tree pond according to claim 7 or 8, characterized in that, The combined rainwater percolation tree pool includes at least two overflow purification ponds (10), and the at least two overflow purification ponds (10) are arranged in sequence along the direction away from the forebay (19); Wherein, two adjacent overflow purification pools (10) are in fluid communication and separated by a third partition wall (22). 10. The combined rainwater filtration tree pond according to claim 9, characterized in that, Along the direction away from the forebay (19), the heights of the bottom surfaces of the at least two overflow purification tanks (10) decrease successively. 11. The combined rainwater filtration tree pond according to claim 10, characterized in that, There are two at least two overcurrent purification pools (10), and the third partition wall (22) is at the same height as the second partition wall (21) on the side close to the front pool (19), The height of the third partition wall (22) is higher than that of the second partition wall (21) on the side away from the front pool (19). 12. The combined rainwater filtration tree pond according to claim 9, characterized in that, A communication pipe (13) is provided to pass through the third partition wall (22), so as to realize the fluid communication between the two adjacent overflow purification pools (10). 13. The combined rainwater infiltration tree pond according to claim 7, characterized in that, The upper surface of the bark covering layer in the planting pond (9) constitutes the bottom surface of the planting pond (9), and the upper surface of the bark covering layer in the overflow purification pond (10) constitutes the The bottom surface of the overflow purification tank (10); The bottom surfaces of the planting pond (9) and the overcurrent purification pond (10) are both lower than the bottom of the water inlet (2). 14. The combined rainwater filtration tree pond according to claim 7, further comprising: A multi-stage overflow port (11) arranged in the planting pond (9) far away from the forebay (19) among the two planting ponds (9); Wherein, the bottom overflow port of the multi-stage overflow port (11) is higher than the bottom surface of the planting pond (9), and the top overflow port of the multi-stage overflow port (11) is lower than the water inlet ( 2) The bottom. 15. The combined rainwater filtration tree pond according to claim 14, further comprising: a drainpipe (15) having an inlet and an outlet; Wherein, the inlet of the drain pipe (15) is connected to the bottom of the multi-stage overflow port (11), and the outlet of the drain pipe (15) is connected to the urban drainage pipe system. 16. The combined rainwater filtration tree pond according to claim 14, further comprising: A jettison (7) has an inlet and an outlet; Wherein, the inlet of the discarding pipe (7) is located at the bottom side wall of the discarding chamber (4) and is in fluid communication with the discarding chamber (4), and the outlet of the discarding pipe (7) is connected to the The multi-stage overflow port (11) is in fluid communication. 17. The combined rainwater filtration tree pond according to claim 14, characterized in that, The forebay (19), the planting pond (9), the overflow purification pond (10) and the multi-stage overflow outlet (11) are integral parts formed by concrete cast-in-place. 18. The combined rainwater filtration tree pond according to claim 1, characterized in that, A seepage pipe is arranged at the bottom of the combined rainwater filtration tree pond.