Sunken green land for sponge city

Abstract

The application relates to a sunken green land for a sponge city, which comprises a road formed by using water-permeable concrete pre-molding and water storage green lands sunkenly formed on both sides or one side of the road, the water storage green lands comprising, from bottom to top, a pebble layer, a water storage layer for water storage and a planting layer with green plants, and the pebble layer and the water storage layer both extending to the bottom of the road, the pebble layer being sunkenly arranged at the positions of the bottom of the road and the side of the road, a plurality of water storage vertical pipes being fixedly connected to the bottom of the road and distributed along the length direction, the water storage vertical pipes being arranged in the pebble layer and the water storage layer, a plurality of water seepage pipes being arranged in the water storage vertical pipes and fixedly connected to the water storage vertical pipes and used for seeping the internal water to the planting layer on both sides of the road, and a plurality of drainage channels being arranged on the road shoulder of the road and used for uniformly distributing the water accumulated on the road to the planting layer. The application can improve the uniformity of rainwater irrigation and improve the utilization rate of rainwater.

Description

Technical Field

[0001] This application relates to the field of green building technology, and in particular to a sunken green space for sponge cities. Background Technology

[0002] To beautify the urban environment, green spaces are often constructed during municipal construction, building projects, and other engineering works to enhance the surroundings and purify the city's air. Common types of existing green spaces include parks and vegetation built along roadsides. However, the commonly used green spaces are generally higher than the roads, which means that water accumulation on the road surface can only be discharged through the rainwater drainage system, easily causing urban flooding.

[0003] Therefore, in existing technologies, for green spaces such as gardens, in order to reduce road water accumulation, green spaces with an elevation lower than the surrounding road surface are often adopted, which are called sunken green spaces. This allows water accumulated on the road to naturally flow to the lower part of the green space under the influence of gravity, and then be stored by the green space, increasing the utilization rate of rainwater.

[0004] However, in actual use, the soil beneath the road is compacted during construction, affecting the water retention capacity of the roadside. Furthermore, when water flows into green spaces, the water content at higher elevations around the road becomes relatively insufficient, causing water to accumulate in lower areas of the green space. This results in uneven water distribution, with a significant amount of water evaporating at the bottom of the green space, leading to lower utilization of rainwater by the vegetation at higher elevations and ultimately lower water efficiency. Summary of the Invention

[0005] In order to reduce the impact of uneven water distribution on water use, this application provides a sunken green space for sponge cities.

[0006] This application provides a sunken green space for sponge cities, employing the following technical solution: A sunken green space for sponge cities includes a road prefabricated with permeable concrete and a water-retaining green space formed by depressions on both sides or one side of the road. The water-retaining green space includes a pebble layer, a water-retaining layer, and a planting layer planted with greenery, distributed sequentially from bottom to top. Both the pebble layer and the water-retaining layer extend below the road. The pebble layer is recessed at the bottom and sides of the road. Multiple water-retaining risers distributed along the length direction are fixedly connected to the bottom of the road. The water-retaining risers pass through the pebble layer and the water-retaining layer. Several infiltration pipes for seeping internal water to the planting layer on both sides of the road are passed through and fixedly connected to the water-retaining risers. Several drainage channels are provided on the road shoulders to evenly distribute road water into the planting layer.

[0007] By adopting the above technical solution, during rainfall, rainwater from the road is drained into the planting layer on the side through drainage channels, and then sequentially enters the water storage layer and the pebble layer. Simultaneously, because the concave part of the pebble layer is located below the road and below the concave part of the planting layer, and the gaps in the pebble layer are relatively large, it facilitates rainwater flow, allowing rainwater to penetrate under the road and be absorbed by the water storage layer below, thereby increasing the water storage capacity around the road and increasing the utilization rate of rainwater. Furthermore, since the road is supported by water storage risers, construction can be completed without compacting the soil beneath the road, thus effectively maintaining the road's foundation. The water storage capacity of the pebble and gravel layers is enhanced. Furthermore, some rainwater from the road can infiltrate into the water storage risers and, after rainfall, seep out through the infiltration pipes to the planting layer, further increasing the absorption of rainwater by the planting layer's elevation. Because the road is covered by the underlying water storage and pebble layers, the temperature rises after rainfall, causing rainwater beneath the road to infiltrate towards the planting and water storage layers through capillary action. This ensures that rainwater is utilized more evenly by various parts of the planting layer, effectively improving rainwater utilization without requiring additional electrical equipment, thus facilitating later maintenance.

[0008] Furthermore, the inner wall of the water storage riser is fixedly connected with multiple vertically distributed water storage plates. The water storage plates are recessed to form water storage tanks, and a drain outlet located outside the water storage tank is formed between the water storage plates and the inner wall of the water storage riser. The drain outlets of two adjacent water storage plates are staggered. The multiple seepage pipes are connected to the bottom of multiple water storage tanks one by one.

[0009] By adopting the above technical solution, the water storage tanks formed by multiple vertically distributed water storage plates ensure that after rainfall, water is supplied to different elevations of the planting layer through water storage tanks at corresponding heights. Furthermore, rainwater is permeated to different heights through infiltration pipes to irrigate the planting layer, reducing the possibility of insufficient rainwater penetration due to large infiltration height differences, thus further enhancing the rainwater utilization rate within the water storage risers. Simultaneously, the evaporation of rainwater within the risers after rainfall also moistens the road surface, lowering its temperature, thereby further improving rainwater utilization. At the same time, it can also improve the user experience of the road and the timeliness of water infiltration; in addition, when the rainfall is relatively small, rainwater will preferentially infiltrate into the water storage tank located at the elevation. Thus, when the rainfall is relatively insufficient, the rainwater in the water storage tank at the higher elevation can preferentially irrigate the planting layer located at the elevation, so as to reduce the possibility that the planting layer will be restricted in terms of plant growth due to insufficient rainfall. At this time, the planting layer located at the lower elevation can be irrigated through the water accumulated in the depression. Thus, whether the rainfall is relatively small or large, the different height positions of the planting layer can be irrigated relatively evenly.

[0010] Furthermore, the seepage pipe includes an elastic pipe and a seepage strip inserted through the elastic pipe. One end of the elastic pipe is inserted through the water storage riser and connected to the bottom of the water storage tank. One end of the seepage strip extends into the water storage tank, and the other end of the seepage strip extends out of the elastic pipe and is buried in the upper part of the water storage layer.

[0011] By adopting the above technical solution, after rainfall, the temperature rises, and the relatively closed structure of the water storage riser leads to increased pressure within the riser. This pressure helps propel rainwater in the storage tank outward through the elastic pipe. Simultaneously, the sealing of the seepage strip slows down the flow of rainwater, maintaining a relatively stable irrigation of the planting layer while reducing the possibility of rainwater being absorbed by the storage layer before it penetrates to the planting layer, further improving rainwater utilization. Furthermore, during rainfall, the temperature drops, causing a relative decrease in pressure within the riser. This, combined with the elastic pipe, helps draw rainwater from the planting layer into the storage tank. During this process, the seepage strip filters the water, ensuring timely replenishment of rainwater in the riser even when rainfall is relatively light. This allows for renewed rainwater infiltration into the planting layer after rainfall, extending the irrigation cycle and further improving rainwater utilization.

[0012] Furthermore, the water storage riser includes a bottom pipe and multiple pipe sections arranged from bottom to top. The lower end of the bottom pipe is closed, and the upper end of the uppermost pipe section is fixedly connected to the road. The multiple pipe sections and the bottom pipe are spliced ​​together, and the water storage plate is arranged one-to-one with the bottom pipe and the pipe section.

[0013] By adopting the above technical solution, since the soil under the road does not need to be compacted, which is not convenient for the construction of water storage risers, when installing water storage risers, it is only necessary to first install the bottom pipe under the location, and then splice the pipe sections together in sequence; so as to facilitate construction and reduce pollution to the soil around the road.

[0014] Furthermore, the inner wall of the upper opening edge of the bottom pipe and the pipe section is provided with a splicing groove, and the lower opening edge of the pipe section is fixedly connected with a coaxially arranged splicing ring. The splicing ring is inserted into the splicing groove of the pipe section or the bottom pipe below the pipe section, and a water-permeable elastic ring is provided between two adjacent pipe sections or between the pipe section and the adjacent bottom pipe.

[0015] By adopting the above technical solution, splicing can be completed simply by inserting the splicing ring into the splicing groove during the construction of the water storage riser. At the same time, during use, the permeable elastic ring can ensure relatively sufficient contact between adjacent pipe sections and between the bottom pipe and the pipe section. During rain, rainwater around the water storage riser can seep into the water storage tank through the permeable elastic ring, thereby further increasing the rainwater collection speed of the water storage riser and further optimizing the utilization rate of rainwater.

[0016] Furthermore, multiple connectors are provided between two adjacent pipe sections and between the bottom pipe and adjacent pipe sections. The connectors include connecting anchor rods, connecting anchor pipes, and protective pipes. The connecting anchor rods are coaxially inserted through the protective pipes, and one end of the connecting anchor rod and the protective pipe is preset at the lower opening edge of the pipe section. The connecting anchor pipe is inserted in the gap between the connecting anchor rod and the protective pipe, and the connecting anchor pipe is preset within the upper opening edge of the pipe section or the bottom pipe.

[0017] By adopting the above technical solution, since the pipe sections are spliced ​​together and the bottom pipe is spliced ​​together, when splicing, it is only necessary to insert the connecting anchor pipe into the gap between the connecting anchor rod and the protective pipe. During use, the protective pipe can protect the connecting anchor rod and the protective pipe, thereby reducing the possibility of corrosion of the connecting anchor rod and the connecting anchor pipe caused by water seepage between the pipe sections and between the bottom pipe and the pipe section.

[0018] Furthermore, a filling ring is provided in the gap between the protective pipe and the connecting anchor rod or inside the connecting anchor pipe. The filling ring is hollow and filled with structural adhesive. The outer walls of the connecting anchor rod, the connecting anchor pipe, and the protective pipe are all provided with spirally extending spiral grooves.

[0019] By adopting the above technical solution, when the connecting anchor pipe is inserted into the gap between the connecting anchor rod and the protective pipe, the filling pipe can be crushed, allowing the structural adhesive to overflow and fill the space inside the protective pipe. During the process of inserting the connecting anchor rod into the connecting anchor pipe, the structural adhesive can flow in the spiral annular groove, so that the structural adhesive can be applied relatively fully to the outer wall of the connecting anchor rod, the connecting anchor pipe, and the inner and outer walls of the protective pipe. Thus, the application of structural adhesive can be completed without the need for additional application of structural adhesive during construction. Furthermore, the cured structural adhesive portion is located within the spiral annular groove, which can further enhance the overall stability of the connection of the connector.

[0020] Furthermore, one end of the drainage channel is fixedly connected to the road, and the other end extends towards the bottom of the water-retaining green space. The drainage channel is formed with multiple drainage troughs, which are divided into two groups distributed along the width of the drainage channel. Within each group, multiple drainage troughs are distributed along the length of the drainage channel. The two groups of drainage troughs are staggered, opening towards each other and communicating with one another. The inner wall of each drainage trough is arc-shaped and divided into two guide sections and a water-retaining section. The two guide sections extend into two adjacent drainage troughs in the other group. The two ends of the water-retaining section along the length of the drainage channel are connected to the two guide sections. A drain hole communicating with the outside is provided at the bottom of each drainage trough. By adopting the above technical solution, rainwater flows from the road into the drainage ditch and is guided into the water storage section by the guide section, where it is buffered. In addition, since multiple drainage ditches are distributed from top to bottom, when the rainwater is relatively small, it can be discharged from the drain holes in the higher drainage ditches first, and the planting layer can be irrigated, so that the rainwater can infiltrate into the water storage riser relatively quickly. When the rainwater is relatively large, multiple drainage ditches can allow the rainwater to enter the bottom of the water storage green space after multiple buffering, which can effectively reduce the erosion of the planting layer by rainwater.

[0021] Furthermore, multiple parallel drain pipes are provided between two adjacent drainage channels. The two ends of the drain pipes are respectively connected to the inner walls of the drain holes of the two adjacent drainage channels. The pipe walls are formed by extruding and stacking fiber filaments. A drain plate is fixedly connected to the inner wall of the drain pipe. The drain plate is formed with evenly distributed pores and is fitted to the inner wall of the drain pipe.

[0022] By adopting the above technical solution, due to differences in rainfall and the smoothness of the road, there is a possibility of localized rainwater concentration on the road. When there is relatively little rain, the drainage channel with relatively more rainwater can channel some of the rainwater into the adjacent drainage channel through the drainage board. Furthermore, as the rainwater flows through the drainage board, it can irrigate the planting layer between the drainage channels relatively evenly. In addition, the drainage pipe can buffer the overflowing rainwater to reduce the erosion of the planting layer and increase the uniformity of rainwater irrigation.

[0023] Furthermore, a buffer seat is provided at the lower end of the drainage channel, and the lower end of the drainage channel is inserted into the buffer seat, which is formed by extruding and stacking fiber filaments.

[0024] By adopting the above technical solution, the pores of the buffer seat can further buffer rainwater when there is relatively more rain, so as to further reduce the erosion of the bottom of the water-retaining green space.

[0025] In summary, this application includes at least one of the following beneficial technical effects: During rainfall, rainwater flows through drainage channels into drainage pipes, irrigating the planting layer beside the drainage channels via the pipes and drainage boards. The water then flows into the water storage layer and pebble layer. The pebble layer's recessed areas are located below the road and the planting layer, and its relatively large gaps facilitate rainwater flow, allowing rainwater to penetrate beneath the road and be absorbed by the water storage layer. This increases the water storage capacity around the road and improves rainwater utilization. Furthermore, because the road is supported by water storage risers, construction can be completed without compacting the soil beneath the road, thus effectively... This system maintains the water storage capacity of the water storage layer and pebble layer beneath the road. Furthermore, some rainwater can seep into the water storage riser and, after rainfall, be exfiltrated through the infiltration pipes to the planting layer, further increasing the planting layer's absorption of rainwater. Because the road is covered by the underlying water storage and pebble layer, the temperature rises after rainfall, causing rainwater to seep towards the planting and water storage layers through capillary action. This ensures that rainwater is utilized more evenly across the planting layer, effectively improving rainwater utilization without requiring additional electrical equipment, thus facilitating future maintenance. Attached Figure Description

[0026] Figure 1 This is a partial structural diagram of an embodiment of this application.

[0027] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure along line AA.

[0028] Figure 3 yes Figure 2 A magnified structural diagram of part B.

[0029] Figure 4 yes Figure 2 A magnified structural diagram of section C.

[0030] Figure 5 This is a partial structural diagram of two adjacent pipe sections in an embodiment of this application, which is used to illustrate the structure of the connector.

[0031] Figure 6 yes Figure 1 Schematic diagram of the cross-sectional structure of the DD line.

[0032] Figure 7 yes Figure 6 A magnified structural diagram of the middle section.

[0033] Figure 8yes Figure 1 A magnified structural diagram of section F in the middle.

[0034] Explanation of reference numerals in the attached diagram: 1. Road; 11. Precast road section; 111. Drainage outlet; 2. Water-retaining green space; 21. Pebble layer; 211. Drainage layer; 22. Water-retaining layer; 23. Planting layer; 3. Water-retaining riser; 31. Infiltration pipe; 311. Flexible pipe; 312. Infiltration strip; 32. Water-retaining plate; 321. Water-retaining trough; 322. Drain outlet; 33. Bottom pipe; 34. Pipe section; 341. Splicing groove; 342. Splicing ring; 35. 36. Permeable elastic ring; 361. Connecting anchor bolt; 362. Connecting anchor pipe; 363. Protective pipe; 364. Filling ring; 365. Spiral ring groove; 4. Drainage channel; 41. Drainage trough; 411. Guide part; 412. Water storage part; 413. Drain hole; 42. Drainage pipe; 421. Drainage board; 43. Buffer seat; 5. Control component; 51. Expansion pipe; 52. Expander; 53. Installation pipe; 54. Air pipe. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0036] This application discloses a sunken green space for use in sponge cities. (See also...) Figure 1 and Figure 2 The sunken green space includes a road 1 and a water-retaining green space 2 located on one or both sides of the road 1. The water-retaining green space 2 is formed by sunken soil on the side of the road 1. The water-retaining green space 2 includes, from bottom to top, a pebble layer 21, a water-retaining layer 22, and a planting layer 23 planted with greenery. The water-retaining layer 22 is formed by laying clay ceramsite on top of the pebble layer 21, and the planting layer 23 is formed by laying planting soil.

[0037] Below Road 1, there is also a pebble layer 21 and a water storage layer 22. The pebble layer 21 is recessed at the bottom and side of Road 1, so that the pebble layer 21 at the side of Road 1 is at the top.

[0038] Reference Figure 1 and Figure 3Furthermore, road 1 comprises multiple prefabricated road sections 11 joined together, and a water storage riser 3 is installed at the joint of two adjacent prefabricated road sections 11. The water storage riser 3 is vertically arranged. The lower end of the water storage riser 3 is closed, and the upper end of the water storage riser 3 is connected to the joint of two adjacent prefabricated road sections 11. The shoulder of road 1 is provided with several drainage channels 4 distributed along its length. The drainage channels 4 are used to evenly distribute the accumulated water of road 1 onto the planting layer 23. Specifically, the shoulder of the prefabricated road section 11 has a drainage outlet 111. The edge of the drainage outlet 111 is fixed and connected to the upper end of the drainage channel 4, and the lower end of the drainage channel 4 is connected to the bottom of the planting layer 23. The drainage channel 4 is embedded within the planting layer 23. The water storage riser 3 or the road 1 is equipped with a control component 5 for controlling the pressure inside the water storage riser 3. Preferably, the control component 5 is set on the shoulder of the precast road section 11 to increase the pressure inside the water storage riser 3 by heating and decrease the pressure inside the water storage riser 3 by cooling.

[0039] Reference Figure 2 and Figure 3 The water storage riser 3 includes a bottom pipe 33 and multiple pipe sections 34 arranged from bottom to top. The lower end of the bottom pipe 33 is closed, and both the bottom pipe 33 and the pipe sections 34 are precast components made of reinforced concrete precast profiles. The multiple pipe sections 34 and the bottom pipe 33 are spliced ​​together to form the water storage riser 3. The inner side of the bottom pipe 33 and the pipe sections 34 are respectively provided with water storage plates 32. The water storage plates 32 are fixedly connected to the inner wall of the bottom pipe 33 or the pipe section 34. This allows the bottom pipe 33 to be pre-installed in the roadbed during construction, and then the pipe sections 34 to be spliced ​​in sequence. It is not necessary to compact the water storage layer 22 and the gravel layer 21 around the water storage riser 3 to support the precast road section 11, so as to make full use of the space under the road 1 for water storage. At the same time, it can also use the rainwater accumulated under the road 1 to maintain the moisture of the road 1, so as to make full use of the rainwater. In addition, it can also reduce the damage of on-site construction concrete to the soil around the road 1.

[0040] Reference Figure 2 and Figure 3 The water storage plate 32 is recessed to form a water storage tank 321, and a drain outlet 322 is formed between the water storage plate 32 and the inner wall of the pipe section 34; and a drain outlet 322 is also formed between the water storage plate 32 and the inner wall of the bottom pipe 33, and the drain outlet 322 is located outside the water storage tank 321, so that after the water in the water storage tank 321 is full, it can fall into the water storage tank 321 or the bottom pipe 33 below through the drain outlet 322.

[0041] Furthermore, both pipe section 34 and bottom pipe 33 are connected to and fixed with seepage pipes 31. The seepage pipes 31 are connected to the water storage tank 321. The end of the seepage pipe 31 away from pipe section 34 or bottom pipe 33 is embedded in the water storage layer 22 and planting layer 23 to drain water from the water storage tank 321 to different heights of the water storage layer 22 and planting layer 23 through seepage.

[0042] During use, some water from the prefabricated road section 11 seeps directly into the water storage riser 3, while the remaining water enters the drainage channel 4 through the drain outlet 111. The drainage channel 4 then allows the accumulated water to seep into the water storage layer 22 and planting layer 23 on both sides of the road 1, absorbing the accumulated water. During this process, due to the relatively large gaps in the pebble layer 21, the water that has seeped through the water storage layer 22 can flow through the pebble layer 21 to the lower part of the road 1 for secondary storage, and also to the bottom of the pebble layer 21 located on the side of the road 1 for further storage, thus fully utilizing the water resources of the road 1. The space below stores water; and through the shielding of road 1, the evaporation of water below road 1 is effectively reduced, thereby effectively increasing the utilization rate of rainwater; after rain, due to the increase in temperature and the closed design of the water storage riser 3, the pressure inside the water storage riser 3 will increase, so that the water in the water storage riser 3 can seep into different height positions of the water storage layer 22 and the planting layer 23 through the infiltration pipe 31, so as to fully optimize the utilization rate of rainwater. In this process, the reuse of rainwater does not require the use of water pumps or other electrical equipment, effectively reducing the work of later maintenance.

[0043] Furthermore, in practical use, since the prefabricated road section 11 is connected to the ground through the water storage riser 3, which supports the prefabricated road section 11, it is not necessary to compact the roadbed below the road 1 during construction. This effectively increases the water storage space, thereby increasing the retention of rainwater and improving the utilization rate of rainwater without the need for electrical equipment. When rainfall is relatively low, rainwater from the road 1 will preferentially enter the water storage tank 321 located at a higher level within the same water storage riser 3 through the splicing part of the prefabricated road section 11. This ensures that when rainfall is insufficient, the rainwater accumulated in the higher water storage tank 321 will preferentially irrigate the planting layer 23 located at an elevation on both sides of the road 1 and infiltrate downwards, further improving the utilization rate of rainwater.

[0044] Reference Figure 2 and Figure 3Furthermore, a drainage layer 211 is laid between the recessed parts of the pebble layer 21. The drainage layer 211 is horizontally positioned and connected to the bottom of the recessed parts of the pebble layer 21. The drainage layer 211 is formed by paving with pebbles. After rain, when the water storage layer 22 and the pebble layer 21 below the road 1 are relatively dry, rainwater will seep from the relatively moist position to the dry position through capillary action. At this time, the rainwater accumulated in the recessed part of the water storage layer 22 on the side of the road 1 can seep into the road 1 relatively quickly through the drainage layer 211 via the pebble layer 21. This further utilizes the rainwater accumulated in the water storage green space 2 to moisten the water storage layer 22 and the pebble layer 21 below the road 1, and then moistens the road 1 through capillary action, thereby maintaining the moisture of the road 1 and optimizing the utilization rate of rainwater in the water storage green space 2.

[0045] Reference Figure 2 and Figure 3 Furthermore, since the water in the water storage tank 321 needs to be drained through the infiltration pipe 31 to the water storage layer 22 and the pebble layer 21 on both sides of the road 1, in order to increase the infiltration path of the infiltration pipe 31, the infiltration pipe 31 includes an elastic pipe 311 and an infiltration strip 312 passing through the elastic pipe 311. The elastic pipe 311 is made of a waterproof material, such as waterproof rubber or plastic; the infiltration strip 312 is made of a waterproof material, such as a cotton strip, a bundled capillary tube, or a cotton swab.

[0046] One end of the elastic tube 311 passes through the pipe section 34 or the bottom pipe 33 and extends into the water storage tank 321. The elastic tube 311 is connected to the bottom of the water storage tank 321 and is fixedly connected to the pipe section 34 or the bottom pipe 33. The other end of the elastic tube 311 extends out of the pipe section 34 or the bottom pipe 33 and extends horizontally or downwardly into the water storage layer 22 and the planting layer 23 on the side of the road 1. One end of the seepage strip 312 is located in the water storage tank 321, and the other end of the seepage strip 312 extends out of the elastic tube 311 and is buried in the planting layer 23 and the water storage layer 22 on the side of the road 1.

[0047] When water is needed on the side of road 1, it is usually after the temperature has risen. Due to the isolation of road 1, water storage layer 22, and pebble layer 21, the temperature inside water storage riser 3 is lower than the external temperature. Therefore, when the external temperature rises, the temperature inside water storage riser 3 will rise synchronously. This will cause the water inside water storage riser 3 to evaporate and increase the pressure inside water storage riser 3. At this time, it will promote the discharge of rainwater in water storage tank 321 through elastic pipe 311. Due to the sealing of seepage strip 312, the rainwater in water storage tank 321 can only slowly seep out into water storage layer 22 and pebble layer 21 through capillary action, thereby moistening the areas on the side of road 1 that are not submerged by water, so as to maintain the utilization of rainwater and reduce unnecessary waste of water resources.

[0048] Reference Figure 2 and Figure 3 Furthermore, since the water storage riser 3 is formed by splicing a bottom pipe 33 and multiple pipe sections 34, in order to increase the utilization rate of rainwater and the stability of the road 1 support, splicing grooves 341 are provided on the inner walls of the upper opening edges of the bottom pipe 33 and pipe sections 34. The splicing grooves 341 are annular grooves and are set on the same central axis as the bottom pipe 33 and pipe sections 34. The splicing grooves 341 open towards the central axis of the pipe sections 34 and the upper opening. A coaxial splicing ring 342 is fixedly connected to the lower opening edge of the pipe section 34. The splicing ring 342 is inserted into the splicing groove 341 on the pipe section 34 or the bottom pipe 33 below it. A permeable elastic ring 35 is provided between two adjacent pipe sections 34 or between a pipe section 34 and an adjacent bottom pipe 33. The cross-section of the permeable elastic ring 35 is Z-shaped to fit the contour of the inner wall of the splicing groove 341 and the outer wall of the splicing ring 342. Among them, the permeable elastic ring 35 is supported by an elastic permeable material, such as a permeable rubber ring.

[0049] During construction, the splicing ring 342 can be inserted into the splicing groove 341 to splice two adjacent pipe sections 34 or to splice the pipe section 34 to the bottom pipe 33. At the same time, since the permeable elastic ring 35 is located between two adjacent pipe sections 34 and between the pipe section 34 and the bottom pipe 33, rainwater around the water storage riser 3 can also seep into the water storage tank 321 through the permeable elastic ring 35 during rain, thereby increasing the rate at which the water storage tank 321 accumulates rainwater, further optimizing the utilization rate of rainwater, and replenishing the rainwater in the water storage tank 321 in a relatively timely and rapid manner. In addition, the permeable elastic ring 35 can also ensure sufficient contact between two adjacent pipe sections 34 and between the pipe section 34 and the bottom pipe 33.

[0050] Reference Figure 3 and Figure 4 In addition, due to the presence of a permeable elastic ring 35, there is a lateral displacement margin between two adjacent pipe sections 34 and between the bottom pipe 33 and the connected pipe section 34. In order to make the connection between pipe sections 34 and between the bottom pipe 33 and pipe section 34 relatively stable, and to reduce the impact of splicing and the permeable elastic ring 35 on the connection stability, multiple connectors 36 are provided at the lower opening edge of the pipe section 34, and the multiple connectors 36 are arranged around the central axis of the pipe section 34.

[0051] Reference Figure 4 and Figure 5Specifically, the connector 36 includes a connecting anchor rod 361, a connecting anchor pipe 362, and a protective pipe 363. The protective pipe 363 is sleeved on the connecting anchor rod 361, and the protective pipe 363, connecting anchor pipe 362, and connecting anchor rod 361 are arranged along the same central axis. One end of the protective pipe 363 and the connecting anchor rod 361 is pre-set inside the lower opening edge of the pipe section 34; the other end of the protective pipe 363 and the connecting anchor rod 361 extends downward along the axial direction of the pipe section 34. The connecting anchor pipe 362 is pre-set entirely inside the upper opening edge of the pipe section 34 or the upper opening edge of the bottom pipe 33, and the connecting anchor pipe 362 is inserted into and adapted to the gap between the protective pipe 363 and the connecting anchor rod 361. The protective pipe 363 is made of engineering plastic, and the connecting anchor rod 361, connecting anchor pipe 362, and protective pipe 363 all pass through the permeable elastic ring 35.

[0052] Furthermore, a filling ring 364 is provided in the gap between the protective tube 363 and the connecting anchor rod 361 or inside the connecting anchor tube 362. The filling ring 364 has a hollow structure and is filled with structural adhesive. The filling ring 364 is made of a fragile material, such as plastic film, fragile paper, or glass. The outer walls of the connecting anchor rod 361, the connecting anchor tube 362, and the protective tube 363 are all provided with spirally extending spiral grooves 365, which surround the central axis of the connecting anchor rod 361.

[0053] When splicing the water storage riser 3, simply insert the connecting anchor 361 and the protective pipe 363 into the permeable elastic ring 35 first; then insert the connecting anchor 361 into the connecting anchor pipe 362. During this process, the connecting anchor pipe 362 will crush the filling ring 364, causing the structural adhesive inside the filling ring 364 to overflow. Because the connecting anchor pipe 362 fills the cavity between the protective pipe 363 and the connecting anchor 361, the structural adhesive will first flow through the spiral annular groove 365 and overflow from the protective pipe 363. In addition, since the spiral annular groove 365 is set around the central axis of the connecting anchor 361, it will cause the connecting anchor 361 and the connecting... The structural adhesive in the spiral groove 365 on the inner wall of the anchor pipe 362 can be applied relatively fully to the inner and outer walls of the connecting anchor rod 361, the connecting anchor pipe 362, and the inner wall of the protective pipe 363. This allows the connecting anchor rod 361, the connecting anchor pipe 362, and the protective pipe 363 to be connected relatively well without the need for manual application of structural adhesive in a relatively confined space, thus facilitating construction. At the same time, the spiral groove 365 on the outer wall of the protective pipe 363 also allows structural adhesive to overflow, reducing the impact of un-overflowed structural adhesive on the splicing of the pipe section 34 and the bottom pipe 33. This achieves the effect of facilitating construction while improving the utilization rate of rainwater.

[0054] Reference Figure 6 and Figure 7Multiple control components 5 are provided for the same water storage riser 3, and the control components 5 are located on the shoulder of the prefabricated road section 11. The control component 5 includes an expansion pipe 51, an expander 52 disposed inside the expansion pipe 51, and an installation pipe 53. The expansion pipe 51 and the expander 52 are both disposed inside the installation pipe 53. The expansion pipe 51 is closed, and one end of the expansion pipe 51 is connected to the inside of the water storage riser 3 through an air pipe 54. The other end of the expansion pipe 51 abuts against the expander 52 through an expansion plate 511, and the end of the expansion pipe 51 connected to the air pipe 54 is fixedly connected to the inner wall of the installation pipe 53. The expander 52 is tubular and the pipe wall of the expander 52 has a grid-like structure, or the expander 52 has a helical spring-like structure, preferably a helical spring-like structure. The expander 52 is made of low-temperature expansion memory metal, and the expansion pipe 51 is made of elastic material, such as rubber corrugated pipe, silicone corrugated pipe, or metal corrugated pipe. The expansion joint 52 is fixedly connected to the inner wall of the mounting pipe 53 at the end away from the expansion pipe 51, and the mounting pipe 53 is fixedly connected to the shoulder of the precast road section 11.

[0055] During use, the temperature of the road surface 1 changes relatively greatly during and after rain, especially the temperature of the road surface 1, which can rise from normal temperature to over 60°C. At this time, the expander 52 can squeeze the expansion tube 51 to help increase the pressure in the water storage riser 3, thereby helping to allow water in the water storage tank 321 to seep out through the infiltration pipe 31. In addition, during rainfall, the road surface temperature drops relatively quickly, at which time the expander 52 will contract and the expansion tube 51 will extend to help reduce the pressure in the water storage riser 3, thereby helping to allow external water to seep into the water storage tank 321 through the infiltration pipe 31. This allows for the regulation of the pressure in the water storage riser 3 without the need for water pumps or other electrical equipment, and optimizes the collection and utilization of rainwater.

[0056] Of course, in other embodiments, the expander 52 may also be made of cured foamed epoxy resin.

[0057] Reference Figure 7 and Figure 8 Furthermore, the drainage channel 4 is formed with multiple drainage troughs 41 for water storage. The multiple drainage troughs 41 are divided into two groups, and the two groups of drainage troughs 41 are distributed along the width direction of the drainage channel 4. The drainage troughs 41 have openings, and the two groups of drainage troughs 41 open towards each other. The inner wall of the drainage trough 41 perpendicular to the length direction of the drainage channel 4 is arc-shaped, and the inner wall of the drainage trough 41 perpendicular to the length direction of the drainage channel 4 includes a water storage part 412 and two guide parts 411.

[0058] Reference Figure 7 and Figure 8The two guide portions 411 extend away from each other into two adjacent drainage troughs 41 of a corresponding group. Both guide portions 411 extend into another group of drainage troughs 41, with the drainage troughs into which the two guide portions 411 extend being adjacent. The opposite ends of the two guide portions 411 are connected to both ends of the water storage portion 412. The water storage portions 412 of the two groups of drainage troughs 41 are recessed in the opposite direction, so that the two groups of drainage troughs 41 are staggered. A drain hole 413 communicating with the outside is provided at the bottom of the drainage trough 41, meaning the drain hole 413 passes through the bottom of the water storage portion 412. The drainage trough 41 located at the top of the drainage channel 4 is connected to the drain outlet 111.

[0059] When it rains, the rainwater flows relatively rapidly from the drain outlet 111 into the drainage ditch 41. If it were directly discharged into the planting layer 23, it would cause some soil erosion. Instead, the rainwater is guided by the upper guide section 411 of the drainage ditch 41, and further buffered by the water storage section 412 and the lower guide section 411, effectively reducing the impact of the rainwater. The rainwater then flows out through the drain hole 413 at the bottom of the water storage section 412. After entering the drainage channel 4, if the rainfall is relatively light, the water storage section 412 will prioritize irrigating the top of the planting layer 23. Then, some of the rainwater seeps into the pebble layer 21 and is stored below the road 1, while the remaining rainwater seeps into the pebble layer 21. The rainwater enters the ground and flows into the bottom of the water-retaining green space 2 and underground. When there is relatively more rainwater, it will be buffered by multiple drainage channels 41 and watered from top to bottom. Finally, after multiple buffering, the rainwater can enter the bottom of the water-retaining green space 2 relatively slowly. This allows the water to be irrigated in the relatively dry elevated parts of the water-retaining green space 2 when there is less rain, instead of flowing directly into the bottom of the water-retaining green space 2, thus improving the utilization rate of rainwater. When there is relatively more rainwater, the rainwater can be buffered multiple times in the rainwater drainage channel 4 and the water can be irrigated in the elevated parts of the water-retaining green space 2 simultaneously. This allows the area below the road 1 to be replenished with water in a timely manner while reducing the erosion of the bottom of the water-retaining green space 2 by rainwater.

[0060] In order to further reduce the erosion of the bottom of the water storage green space 2 by rainwater when the rainfall is relatively heavy, a buffer seat 43 is provided at the lower end of the drainage channel 4. The lower end of the drainage channel 4 is inserted into the buffer seat 43, and the buffer seat 43 is made of a three-dimensional porous material made of plastic fiber filaments or rubber fiber filaments extruded and stacked, and the junctions of the fiber filaments are fused together. This results in multiple densely distributed pores in the buffer seat 43, which are used to buffer and disperse the rainwater discharged from the drainage channel 4.

[0061] To further optimize the rainwater collection effect of the water-retaining green space 2, multiple parallel drainage pipes 42 are installed between two adjacent drainage channels 4. The drainage pipes 42 are embedded in the planting layer 23, and the multiple drainage pipes 42 are distributed along the length of the drainage channel 4. The two ends of the drainage pipes 42 are respectively inserted into and fixedly connected to the inner wall of the drainage hole 413 of the two adjacent drainage channels 4, so that the drainage pipes 42 can be connected to the drainage troughs 41 on the two adjacent drainage channels 4 at the same time. The wall of the drain pipe 42 is made of a three-dimensional porous material formed by extruding and stacking plastic and rubber fiber filaments and fusing the junctions of the fiber filaments, so that the wall of the drain pipe 42 has relatively dense pores to facilitate drainage; and a drain plate 421 is fixedly connected to the bottom of the inner wall of the drain pipe 42. The drain plate 421 has an arc-shaped plate structure and is set on the same central axis as the drain pipe 42. The drain plate 421 has multiple pores evenly distributed and is attached to the inner wall of the drain pipe 42.

[0062] In use, water discharged from the drainage hole 413 flows through the drainage board 421 to various parts of the drainage pipe 42. As rainwater flows through the drainage board 421, it is channeled through the pores into the planting layer 23 via the drainage pipe 42. Furthermore, the relatively dense pores in the pipe wall of the drainage pipe 42 divert and buffer the rainwater as it flows through, allowing it to flow relatively smoothly into the planting layer 23. In addition, in cases of concentrated rainwater on the road 1, the drainage board 421 and drainage pipe 42, connected by the drainage channel 41, can guide the rainwater into the adjacent drainage channel 4, allowing it to flow relatively smoothly to the elevation of the planting layer 23. This reduces the erosion of the planting layer 23 caused by concentrated rainwater on the road 1, effectively improving the rainwater storage and utilization efficiency of the water-retaining green space 2.

[0063] Of course, in other embodiments, the drainage channel 4 can also be configured as one drainage groove 41, and the drainage groove 41 extends along the length direction of the drainage channel 4. The bottom wall of the drainage groove 41 is provided with multiple buffer grooves distributed along the length direction of the drainage channel 4. The buffer grooves are set with inclined upward openings, and the drainage pipe 42 can be connected to the buffer grooves.

[0064] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A sunken green land for a sponge city, characterized in that: The road (1) is prefabricated using permeable concrete and a water-retaining green space (2) formed by depression on both sides or one side of the road (1). The water-retaining green space (2) includes a pebble layer (21), a water storage layer (22) for water storage, and a planting layer (23) planted with green plants, which are distributed from bottom to top. The pebble layer (21) and the water storage layer (22) both extend to the bottom of the road (1). The pebble layer (21) is recessed at the bottom of the road (1) and at the side of the road (1). The bottom of the road (1) is fixedly connected to a plurality of water-retaining risers (3) distributed along the length direction. The water storage riser (3) passes through the pebble layer (21) and the water storage layer (22). The water storage riser (3) is connected to several infiltration pipes (31) for seeping internal water to the planting layer (23) on both sides of the road (1). The road shoulder of the road (1) is provided with several drainage channels (4) for evenly distributing the water accumulated on the road (1) to the planting layer (23). The inner wall of the water storage riser (3) is fixedly connected to several vertically distributed water storage plates (32). The water storage plates (32) are recessed to form water storage troughs (321). The water storage plates (32) are connected to the inner wall of the water storage riser (3). The drainage outlet (322) is formed on the outside of the water storage tank (321). The drainage outlets (322) of two adjacent water storage plates (32) are staggered. The multiple seepage pipes (31) are connected to the bottom of the multiple water storage tanks (321). One end of the drainage channel (4) is fixedly connected to the road (1), and the other end of the drainage channel (4) extends toward the bottom of the water storage green space (2). The drainage channel (4) is formed with multiple drainage troughs (41). The multiple drainage troughs (41) are divided into two groups distributed along the width direction of the drainage channel (4), and multiple drainage troughs in the same group are connected together. The water tank (41) is distributed along the length of the drainage channel (4). The two sets of drainage tanks (41) are staggered and open towards each other and are interconnected. The inner wall of the drainage tank (41) is arc-shaped and divided into two guide parts (411) and a water storage part (412). The two guide parts (411) extend into the other two adjacent drainage tanks (41). The two ends of the water storage part (412) along the length of the drainage channel (4) are connected to the two guide parts (411). The bottom of the drainage tank (41) is provided with a drain hole (413) that connects to the outside. 2.The sunken green land for a sponge city of claim 1, wherein: The seepage pipe (31) includes an elastic pipe (311) and a seepage strip (312) passing through the elastic pipe (311). One end of the elastic pipe (311) passes through the water storage riser (3) and is connected to the bottom of the water storage tank (321). One end of the seepage strip (312) extends into the water storage tank (321), and the other end of the seepage strip (312) extends out of the elastic pipe (311) and is buried in the upper part of the water storage layer (22).

3. The sunken green land for sponge city according to claim 1, characterized in that: The water storage riser (3) includes a bottom pipe (33) and multiple pipe sections (34) arranged from bottom to top. The lower end of the bottom pipe (33) is closed, and the upper end of the uppermost pipe section (34) is fixedly connected to the road (1). Multiple pipe sections (34) and the bottom pipe (33) are spliced ​​together. The water storage plate (32) is set one by one with the bottom pipe (33) and the pipe section (34).

4. The sunken green land for sponge city according to claim 3, characterized in that: The inner wall of the upper opening edge of the bottom pipe (33) and pipe section (34) is provided with splicing groove (341). The lower opening edge of the pipe section (34) is fixedly connected with a coaxial splicing ring (342). The splicing ring (342) is inserted into the splicing groove (341) of the pipe section (34) or the bottom pipe (33) below the pipe section (34). A water-permeable elastic ring (35) is provided between two adjacent pipe sections (34) or between the pipe section (34) and the adjacent bottom pipe (33).

5. The sunken green land for sponge city according to claim 3, characterized in that: Multiple connectors (36) are provided between two adjacent pipe sections (34) and between the bottom pipe (33) and the adjacent pipe section (34). The connectors (36) include connecting anchor rods (361), connecting anchor pipes (362) and protective pipes (363). The connecting anchor rods (361) are coaxially inserted through the protective pipes (363), and one end of the connecting anchor rods (361) and the protective pipes (363) is preset at the lower opening edge of the pipe section (34). The connecting anchor pipes (362) are inserted in the gap between the connecting anchor rods (361) and the protective pipes (363), and the connecting anchor pipes (362) are preset in the upper opening edge of the pipe section (34) or the bottom pipe (33).

6. A sunken green space for sponge cities according to claim 5, characterized in that: A filling ring (364) is provided in the gap between the protective pipe (363) and the connecting anchor (361). The filling ring (364) is hollow and filled with structural adhesive. The outer wall of the connecting anchor (361), the outer wall of the connecting anchor pipe (362), and the outer wall of the protective pipe (363) are all provided with spiral ring grooves that extend in a spiral manner.

7. A sunken green space for sponge cities according to claim 1, characterized in that: Multiple parallel drain pipes (42) are provided between two adjacent drainage channels (4). The two ends of the drain pipes (42) are respectively connected to the inner walls of the drain holes (413) of the two adjacent drainage channels (4). The pipe wall of the drain pipes (42) is formed by extruding and stacking fiber filaments. A drain plate (421) is fixedly connected to the inner wall of the drain pipes (42). The drain plate (421) is formed with evenly distributed pores and is fitted to the inner wall of the drain pipes (42).

8. A sunken green space for sponge cities according to claim 1, characterized in that: The lower end of the drainage channel (4) is provided with a buffer seat (43), the lower end of the drainage channel (4) is inserted into the buffer seat (43), and the buffer seat (43) is formed by extruding and stacking fiber filaments.

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