A replaceable municipal road rainwater infiltration strip, system and setting method thereof

Abstract

The present invention provides a replaceable municipal road rainwater infiltration belt, system and setting method thereof, comprising a rainwater filtration layer, a water storage cavity and a rainwater infiltration layer arranged in sequence from top to bottom; the rainwater filtration layer is arranged in parallel with the municipal road, and the rainwater filtration layer is arranged in any one of the middle or both sides of the municipal road. The water storage cavity is respectively connected to one or more water inlet pipes of the rainwater pre-buried pipe, and the downstream of the water storage cavity is respectively connected to one or more water outlet pipes of the rainwater pre-buried pipe. The municipal road has a certain slope in the transverse direction; the rainwater infiltration belt is arranged in a strip shape at the lowest point of the transverse slope of the municipal road. The present invention adopts a source and process infiltration system to effectively increase the local groundwater volume, reduce the flow in the rainwater pipe channel, delay the flood peak, reduce the size of the pipe channel along the line and downstream, and can solve the outstanding problems of slow infiltration, easy blockage and difficult maintenance of conventional infiltration facilities, and has strong practicality.

Description

Technical Field

[0001] The invention relates to the field of municipal drainage, and in particular to a replaceable municipal road rainwater infiltration belt, a system and a setting method thereof. Background Art

[0002] As the global climate warms and extreme weather increases, the rainfall intensity in each place is breaking local historical records. This requires each city to be like a sponge, with good flexibility in adapting to environmental changes and responding to natural disasters caused by rain. It enables the city to absorb, store, infiltrate and purify water when it rains, release and utilize the stored water when needed, and realize the free migration of rainwater in the city.

[0003] Rainwater infiltration is one of the important measures for the sustainable use of urban water resources, and it is also an effective method for using rainwater to replenish groundwater. When traditional rainwater infiltration facilities are in use, rainfall washes the ground and flows into point-type rainwater outlets to collect in municipal drainage irrigation channels. The irrigation channels are built thickly to meet the peak flood requirements, and there will be a lot of impurities such as mud and sand in the irrigation channels. Such drainage irrigation channels usually need to be equipped with rainwater treatment facilities for purification at the downstream position, and then slowly infiltrate into the ground through the centralized rainwater infiltration facilities. Moreover, during the use of traditional rainwater infiltration facilities, it is difficult to backwash after the permeable structure layer is blocked, which is inconvenient to maintain. When the blockage is serious, it can only be rebuilt destructively, which wastes manpower, material resources, and financial resources, and has poor practicality. Summary of the invention

[0004] The present invention provides a replaceable municipal road rainwater infiltration belt, system and installation method thereof, which adopts a source and process infiltration system to effectively increase the local groundwater volume, reduce the flow in the rainwater pipe, delay the flood peak, reduce the size of the pipe along the line and downstream, and can solve the outstanding problems of slow infiltration, easy blockage and difficult maintenance of conventional infiltration facilities, and has strong practicality.

[0005] A first aspect of the present invention provides a replaceable municipal road rainwater infiltration strip, comprising a rainwater filtration layer, a water storage cavity and a rainwater infiltration layer arranged in sequence from top to bottom;

[0006] The rainwater filtration layer is arranged in parallel with the municipal road, and the rainwater filtration layer is arranged in the middle or on both sides of the municipal road;

[0007] The rainwater filtration layer and the rainwater penetration layer are prefabricated respectively.

[0008] Optionally, in a possible implementation of the first aspect, the water storage cavity is respectively connected to one or more water inlet pipes of the rainwater pre-buried pipe, and the downstream of the water storage cavity is respectively connected to one or more water outlet pipes of the rainwater pre-buried pipe.

[0009] Optionally, in a possible implementation of the first aspect, the municipal road has a certain slope in the transverse direction;

[0010] The rainwater infiltration belt is arranged at the lowest position of the transverse slope of the municipal road and is arranged in a longitudinal strip along the municipal road.

[0011] Optionally, in a possible implementation of the first aspect, the rainwater filtration layer includes a plurality of single filter plates, and the plurality of single filter plates are spliced ​​into the rainwater filtration layer;

[0012] The filter plate is composed of several layers of filter media, and any two adjacent filter media layers are connected by a water-permeable barrier medium spacer.

[0013] Optionally, in a possible implementation of the first aspect, the rainwater infiltration layer includes a plurality of single infiltration plates, and the plurality of single infiltration plates are spliced ​​into the rainwater infiltration layer;

[0014] The permeable plate is composed of a plurality of permeable medium layers, and any two adjacent permeable medium layers are connected by a water-permeable barrier gasket.

[0015] A second aspect of the present invention provides a replaceable municipal road rainwater infiltration system, comprising the above-mentioned municipal road rainwater infiltration strip, wherein the municipal road rainwater infiltration strip is single or multiple and coaxially arranged.

[0016] Optionally, in a possible implementation of the second aspect, the municipal road includes a green belt;

[0017] A water passage is provided between the green belt and the rainwater infiltration zone of the municipal road.

[0018] A third aspect of the present invention provides a method for setting up a replaceable municipal road rainwater infiltration system, comprising the above-mentioned municipal road rainwater infiltration system, and further comprising the following steps:

[0019] Obtain the slope information of the municipal road and determine the side with the lower slope of the municipal road;

[0020] On the side of the municipal road with a lower slope, trenches are dug to form multiple tunnels, and a rainwater infiltration layer is set at the bottom of the tunnels;

[0021] A rainwater filtration layer is arranged on the surface of the tunnel, so that a water storage cavity is formed between the rainwater infiltration layer and the rainwater filtration layer;

[0022] The positions of the rainwater pre-buried pipes in the municipal roads are determined, and the rainwater pre-buried pipes are connected to the water storage cavity through one or more water inlet pipes.

[0023] Optionally, in a possible implementation manner of the third aspect, the following steps are also included:

[0024] The water inflow V of the road rainwater infiltration system is obtained. The water inflow V is calculated by the following formula:

[0025]

[0026] Among them, T is the first rainfall duration, q is the rainstorm intensity, Ao is the area directly subjected to rainfall by the facility, A is the facility service area, Ψ is the runoff coefficient, t is the second rainfall duration, and 1.25 is the safety factor;

[0027] The infiltration volume Vp of the road rainwater infiltration system is obtained. The infiltration volume Vp is calculated by the following formula:

[0028] V p =3 600tKJA s

[0029] Among them, K is the permeability coefficient of the permeable layer, J is the hydraulic gradient, and As is the effective permeable area;

[0030] Obtain the road rainwater storage volume V s, which is calculated using the following formula:

[0031]

[0032] Where As is the area of ​​the maximum rainfall that can be temporarily stored on the road surface per unit length, and L is the length of the road;

[0033] The water inflow V, permeation volume Vp, and water storage volume Vs have the following corresponding relationship:

[0034] V=Vp+Vs.

[0035] Optionally, in a possible implementation manner of the third aspect, the method further includes:

[0036] The water storage cavity is provided with the 1ath automatic baffle, the 2ath automatic baffle, ..., the nath automatic baffle every 100m.

[0037] The 1ath automatic baffle, the 2ath automatic baffle, ..., the nath automatic baffle are respectively provided with the 1ath flow liquid level sensor, the 2ath flow liquid level sensor, ..., the nath flow liquid level sensor at the water storage cavity, and the flow liquid level sensor detects the flow information, liquid level information, and the time under a specific flow or liquid level at the setting point;

[0038] Respectively obtain the 1a flow rate information, 1a liquid level information, and 1a time information detected by the 1a flow rate and liquid level sensor, the 2a flow rate information, 2a liquid level information, and 2a time information detected by the 2a flow rate and liquid level sensor, ..., the nath flow rate information, nath liquid level information, and nath time information detected by the nath flow rate and liquid level sensor;

[0039] A 1b-th automatic baffle, a 2b-th automatic baffle, ..., an nb-th automatic baffle are respectively arranged between the water storage cavity and the one or more water inlet pipes or water outlet pipes;

[0040] The 1bth automatic baffle, the 2bth automatic baffle, ..., the nbth automatic baffle and the water storage cavity are respectively provided with a 1bth flow liquid level sensor, a 2bth flow liquid level sensor, ..., the nbth flow liquid level sensor, and the flow liquid level sensor detects flow information, liquid level information, and time at a specific flow or liquid level at a set point;

[0041] Respectively obtain the 1bth flow information, 1bth liquid level information, and 1bth time information detected by the 1bth flow and liquid level sensor, the 2bth flow information, 2bth liquid level information, and 2bth time information detected by the 2bth flow and liquid level sensor, ..., the nbth flow information, nbth liquid level information, and nbth time information detected by the nbth flow and liquid level sensor;

[0042] The 1bth automatic baffle, the 2bth automatic baffle, ..., the nbth automatic baffle and the water storage cavity are respectively provided with a 1cth flow liquid level sensor, a 2cth flow liquid level sensor, and a

[0043] Device, ..., nc flow level sensor;

[0044] Respectively obtain the 1cth flow information, 1cth liquid level information, and 1cth time information detected by the 1cth flow and liquid level sensor, the 2cth flow information, 2cth liquid level information, and 2cth time information detected by the 2cth flow and liquid level sensor, ..., the ncth flow information, ncth liquid level information, and ncth time information detected by the ncth flow and liquid level sensor;

[0045] Based on the water inflow V, the permeation volume Vp, the water storage volume Vs, the 1ath flow information, the 1ath liquid level information, the 1ath time information, the 2ath flow information, the 2ath liquid level information, the 2ath time information, ..., the nath flow information, the nath liquid level information, the nath time information, the 1bth flow information, the 1bth liquid level information, the 1bth time information, the 2bth flow information, the 2bth liquid level information, the 2bth time information, ..., the nbth flow information, the nbth liquid level information, the nbth time information, the 1cth flow information, the 1cth liquid level information, the 1cth time information, the 2cth flow information, the 2cth liquid level information, the 2cth time information, ..., the ncth flow information, the ncth liquid level information, the ncth time information, obtain the optimal decision plan to control the 1ath automatic baffle, the 2ath automatic baffle, ..., the nath automatic baffle, the 1bth automatic baffle, the 2bth automatic baffle, ..., the nbth automatic baffle;

[0046] The steps of obtaining a decision solution include:

[0047] Rainfall Condition CollectionΩ 2 There are m rainfall conditions, and the rainfall condition set Ω 2 And its corresponding m rainfall conditions are combined into Ω 2 =(e 1 , e 2 ,…,e m ), e i represents one of the rainfall conditions, i = (1, 2, ..., m); determine the decision corresponding to the i-th rainfall condition from the database system,

[0048] Establish the following decision matrix A ij :

[0049]

[0050] Among them, a ij is the decision corresponding to the i-th rainfall condition under dimension j;

[0051] According to the following formula, the sum of the decision scores C of all rainfall conditions i under dimension j is calculated respectively: j , j = (1, 2, ..., p); the formula is:

[0052]

[0053] Identify all C j The maximum value C x , C x The corresponding decision is the optimal decision for rainfall condition i.

[0054] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings.

[0055] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0057] Figure 1 It is a side view of the rainwater infiltration zone;

[0058] Figure 2 This is the cross-sectional view of the rainwater infiltration zone;

[0059] Figure 3 It is the plan view of the rainwater infiltration zone;

[0060] Figure 4 A schematic diagram of a first embodiment of a replaceable municipal road rainwater infiltration system;

[0061] Figure 5 A schematic diagram of a second embodiment of a replaceable municipal road rainwater infiltration system;

[0062] Figure 6 A schematic diagram of a third embodiment of a replaceable municipal road rainwater infiltration system;

[0063] Figure 7 A schematic diagram of a fourth embodiment of a replaceable municipal road rainwater infiltration system;

[0064] Figure 8 A schematic diagram of a first embodiment of a method for setting up a replaceable municipal road rainwater infiltration system. DETAILED DESCRIPTION

[0065] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0066] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present invention and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in sequences other than those illustrated or described herein.

[0067] It should be understood that in various embodiments of the present invention, the size of the sequence number of each process does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0068] It should be understood that in the present invention, "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0069] It should be understood that in the present invention, "plurality" refers to two or more than two. "And / or" is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "Contains A, B and C", "Contains A, B, C" means that A, B, and C are all included, "Contains A, B or C" means that one of A, B, and C is included, and "Contains A, B and / or C" means that any one, any two, or any three of A, B, and C are included.

[0070] It should be understood that in the present invention, "B corresponding to A", "B corresponding to A", "A corresponds to B" or "B corresponds to A" means that B is associated with A and B can be determined based on A. Determining B based on A does not mean determining B based only on A, but B can also be determined based on A and / or other information. A and B match when the similarity between A and B is greater than or equal to a preset threshold.

[0071] Depending on the context, "if" as used herein may be interpreted as "when" or "when" or "in response to determining" or "in response to detecting."

[0072] The technical solution of the present invention is described in detail with specific embodiments below. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0073] The embodiment of the present invention provides a replaceable municipal road rainwater infiltration strip, such as Figure 1 , Figure 2 and Figure 3 As shown, it includes a rainwater filtration layer, a water storage cavity and a rainwater infiltration layer arranged in sequence from top to bottom;

[0074] The rainwater filtration layer is arranged in a strip parallel to the municipal road. The rainwater filtration layer is arranged in the middle or on both sides of the municipal road. The rainwater filtration layer and the rainwater infiltration layer are prefabricated and can be quickly installed, maintained and / or replaced on site. Through the above structure, when it rains, the rainwater is initially filtered through the rainwater filtration layer flow, so that the larger particles in the rainwater are filtered to the surface and / or the middle of the filtration layer. The filtered rainwater flows into the water storage cavity for storage and / or flow. The rainwater in the water storage cavity can be filtered again through the rainwater infiltration layer and infiltrate into the ground. Through the above method, rainwater can be stored in pipes and channels, and rainwater from sources such as surface, multi-region, and multi-point can infiltrate into the ground, increasing the local groundwater storage capacity.

[0075] The water storage cavity is respectively connected to one or more rainwater pre-buried pipes. The water storage cavity can be connected to one or more corresponding inlet pipes and / or outlet pipes. If the local rainwater volume is too large and the water storage cavity accommodates all the rainwater, water can be inletted and / or discharged through one or more inlet pipes and / or outlet pipes, so that the rainwater in the water storage cavity flows into the rainwater pre-buried pipe for discharge. The rainwater infiltration zone can receive rainwater from the rainwater pre-buried pipes in the plots along the line. The received rainwater should be filtered inside the plot to remove impurities, such as D1 inlet pipe, D2 inlet pipe, ..., Dn inlet pipe, D1+1 outlet pipe, D2+2 outlet pipe, ..., Dn+n outlet pipe. The inner bottom of the rainwater inlet and / or outlet pipe is at least 0.15m away from the upper surface of the filter layer.

[0076] In one embodiment, the municipal road has a certain slope in the transverse direction; the rainwater filtration layer is located at the lowest point of the slope of the municipal road and is arranged in a strip along the longitudinal direction of the municipal road. j (%), sidewalk slope i f The rainwater infiltration zone should meet the maximum load requirements under specific conditions, ensure that the flow capacity of the flood peak is met after buffering and infiltration along the line, and avoid overflow.

[0077] In one embodiment, the rainwater filtration layer includes a plurality of single filter plates, and the plurality of single filter plates are spliced ​​into a rainwater filtration layer. The rainwater filtration plate is composed of a plurality of layers of filter media, and any two adjacent filter media layers are connected by a water-permeable medium spacer. The rainwater filtration layer is formed by splicing single filter plates, and the length, width, and height of a single filter plate are L, W, and B, respectively. A single filter plate is formed by the accumulation of n layers of filter media, and n is preferably 3, and can also be taken according to local needs. Each layer of filter media is separated by a water-permeable medium spacer. The filter layer must meet the road-related load requirements and take measures to prevent motor vehicles and bicycles from rolling over it. The filter layer has the ability to bear ground rain and snow or accidental load requirements. Among them, the flow area of ​​a single rainwater filter plate S = W·L.

[0078] In one embodiment, the rainwater penetration layer includes a plurality of single penetration plates, and the plurality of single penetration plates are spliced ​​into a rainwater penetration layer. The rainwater penetration plate is composed of a plurality of permeable medium layers, and any two adjacent permeable medium layers are connected by a water-permeable medium spacer. The rainwater penetration layer is spliced ​​by single penetration plates, and the length, width and height of the single penetration plate are L1, W1 and A respectively. The single penetration plate is formed by the accumulation of n layers of permeable media, and n is preferably 3, and can also be taken according to local needs. Each layer of filter media is separated by a water-permeable medium spacer, and the penetration area of ​​a single rainwater penetration plate is S1 = W1·

[0079] L1.

[0080] The technical solution provided by the present invention is to set up a rainwater infiltration facility belt along the entire road, and the rainfall is collected into the seepage pipe channel through the filter layer and / or water inlet pipe along the road. The filtered rainwater flows and seeps in the seepage pipe culvert. The filter layer and the infiltration layer modules are prefabricated in the factory for large-scale production, and are quickly mechanized and assembled, laid, replaced and / or repaired on site. The system adopts the source and process infiltration system, which effectively increases the local groundwater volume, reduces the flow in the rainwater pipe channel, delays the flood peak, and reduces the size of the pipe channel along the line and downstream, which can solve the outstanding problems of slow infiltration, easy blockage and difficult maintenance of conventional infiltration facilities.

[0081] The embodiment of the present invention also provides a replaceable municipal road rainwater infiltration system, such as Figure 4 , such as 5, Figure 6 as well as Figure 7 As shown, it includes the above-mentioned municipal road rainwater infiltration strip, and the municipal road rainwater infiltration strip is single or multiple and coaxially arranged.

[0082] Wherein, the municipal road includes a green belt. A water passage is provided between the green belt and the rainwater infiltration belt of the municipal road. By providing water passages at regular intervals in the green belt, it is convenient for rainwater to flow to the rainwater purification infiltration facility belt, and then the rainwater at the overflow of the green belt is collected.

[0083] In this embodiment, the road width B, green belt width, non-motorized vehicle lane width, sidewalk width, road length L, and number of lanes are determined according to the traffic volume and relevant upper-level planning. The road curb height hy, the buffer filtered water volume is the volume enclosed by the upper surface of the filter layer and the upper surface of the road and the upper top surface of the curb.

[0084] like Figure 4 As shown in the figure, the first implementation method of setting the rainwater infiltration belt is that the road is a two-way road, and a rainwater infiltration belt is set in the middle of the two-way road. Each one-way road surface includes a sidewalk, a green belt, a non-motorized vehicle lane, a motor vehicle lane, and a rainwater infiltration belt arranged in sequence from the road red line to the road center line. In this implementation method, the motor vehicle lane in the same direction is a double motor vehicle lane. In this implementation method, the middle slope of the road cross section is toward the lowest point in the center of the road.

[0085] like Figure 5 As shown, the second implementation method of setting the rainwater infiltration belt is that the road is a two-way road, and rainwater infiltration belts are set on both sides of the two-way road. Each one-way road surface includes a sidewalk, a green belt, a rainwater infiltration belt, a non-motorized vehicle lane, a motor vehicle lane, and a central dividing strip arranged in sequence from the road red line to the road center line. In this implementation method, the motor vehicle lane in the same direction is a double motor vehicle lane, and the rainwater infiltration belt is located between the green belt and the non-motorized vehicle lane. In this implementation method, the middle slope of the road cross section is the lowest point on both sides of the road.

[0086] like Figure 6 As shown, the third implementation method of setting the rainwater infiltration zone is that the road is a two-way road, and rainwater infiltration zones are set on both sides of the two-way road. Each one-way road surface includes a sidewalk, a rainwater infiltration zone, a non-motorized vehicle lane, a green belt, a motor vehicle lane, and a central dividing strip arranged in sequence from the road red line to the road center line. In this implementation method, the same-direction motor vehicle lane is three motor vehicle lanes, and the rainwater infiltration zone is located between the sidewalk and the non-motorized vehicle lane. In this implementation method, the middle slope of the road cross section is toward the lowest point on both sides of the road.

[0087] like Figure 7 As shown, the fourth implementation method of the rainwater infiltration belt is that the road is a two-way road, and rainwater infiltration belts are set on both sides of the two-way road. Each one-way road surface includes a sidewalk, a rainwater infiltration belt, a non-motorized vehicle lane, a green belt, a motor vehicle lane, and a central green belt arranged in sequence from the road red line to the road center line. In this implementation method, the motor vehicle lanes in the same direction are three motor vehicle lanes, and the rainwater infiltration belt is located between the sidewalk and the non-motorized vehicle lane. In this implementation method, the middle slope of the road cross section is toward the lowest point on both sides of the road.

[0088] The embodiment of the present invention also provides a method for setting up a replaceable municipal road rainwater infiltration system, such as Figure 8As shown, the municipal road rainwater infiltration system includes the above-mentioned steps:

[0089] Step S10: Obtain the transverse slope information of the municipal road and determine the side of the municipal road with a lower transverse slope.

[0090] In step S10, for example, if a road needs to be paved, the setting method of the municipal road rainwater infiltration system can be determined according to the transverse slope setting of the road. If the slope in the middle of the municipal road is lower, a rainwater infiltration zone is set in the middle of the municipal road. If the slopes on both sides of the municipal road are lower, rainwater infiltration zones are set on both sides of the municipal road.

[0091] Step S20: dig trenches on the side of the municipal road with a lower slope to form multiple tunnels, and set a rainwater infiltration layer at the bottom of the tunnel. The rainwater infiltration layer is prefabricated in a factory and mass-produced, and quickly assembled, laid or replaced on site by mechanization.

[0092] Step S30: a rainwater filtration layer is arranged on the surface of the tunnel, so that a water storage cavity is formed between the rainwater infiltration layer and the rainwater filtration layer. The rainwater filtration layer is prefabricated in a factory and mass-produced, and quickly assembled, laid or replaced on site by mechanization.

[0093] Step S40, determine the position of the rainwater pre-buried pipe in the municipal road, and connect the rainwater pre-buried pipe to the water storage cavity through the first water inlet pipe and the second water inlet pipe respectively. By connecting with the rainwater pre-buried pipe, the excess water in the rainwater infiltration zone can be discharged through the rainwater pre-buried pipe to avoid overflow.

[0094] In one embodiment, the following steps are also included:

[0095] The water inflow V of the road rainwater infiltration system is obtained. The water inflow V is calculated by the following formula:

[0096]

[0097] Among them, T is the first rainfall duration, q is the rainstorm intensity, Ao is the area directly subjected to rainfall by the facility, A is the facility service area, Ψ is the runoff coefficient, and t is the second rainfall duration;

[0098] The corrected formula is:

[0099]

[0100] The infiltration volume Vp of the road rainwater infiltration system is obtained. The infiltration volume Vp is calculated by the following formula:

[0101] V p =3 600tKJA s

[0102] Wherein, K is the permeability coefficient of the permeable layer, J is the hydraulic gradient, and As is the effective permeable area.

[0103] According to the current "Outdoor Drainage Design Code", at least one lane should not accumulate water before and after rainfall. According to the road section layout, the road rainwater storage volume Vs is obtained. The rainwater storage volume Vs is calculated by the following formula:

[0104]

[0105] Wherein, As is the area of ​​the maximum rainfall that can be temporarily stored on the road surface per unit length, and L is the length of the road.

[0106] The water inflow V, permeation volume Vp, and water storage volume Vs have the following corresponding relationship:

[0107] V=Vp+Vs

[0108] In one embodiment, by calculating the relationship between the specific water inlet volume V, the specific permeation volume Vp and the specific water storage volume Vs, specific parameters such as the filter layer width, the permeation layer width, the water storage cavity height and the like in this embodiment can be determined.

[0109] In one embodiment, a first automatic baffle and a second automatic baffle are respectively provided between the water storage cavity and the first water inlet pipe or outlet pipe and the second water inlet pipe or outlet pipe. A third automatic baffle is provided in the water storage cavity between the first water inlet pipe or outlet pipe and the second water inlet pipe. The water storage cavity can be separated from the first water inlet pipe or outlet pipe and the second water inlet pipe or outlet pipe by the first automatic baffle and the second automatic baffle, and the flow state of water in the water storage cavity can be controlled by the third automatic baffle. When it is necessary to discharge and / or flow water into the water storage cavity by the first water inlet pipe or outlet pipe and / or the second water inlet pipe or outlet pipe, the first automatic baffle and the second automatic baffle are controlled to be opened and / or closed.

[0110] In addition, the water storage cavity can also divert water in the first water inlet pipe or water outlet pipe and the second water inlet pipe or water outlet pipe, thereby avoiding overflow due to heavy rain in other areas.

[0111] The first water inlet pipe or the water outlet pipe, the second water inlet pipe or the water outlet pipe and the water storage cavity are respectively provided with a first flow liquid level sensor, a second flow liquid level sensor and a third flow liquid level sensor.

[0112] The first flow level time information detected by the first flow level sensor, the second flow level time information detected by the second flow level sensor, and the third flow level time information detected by the third flow level sensor are obtained respectively, and the optimal decision scheme is obtained based on several indicators in the water inflow V, the permeation volume Vp, the water storage volume Vs, the first flow level time information, the second flow level time information, and the third flow level time information to control the first automatic baffle, the second automatic baffle, and the third automatic baffle. The indicators can be rainfall, rainfall time, etc. The decision scheme can be the following:

[0113] 1. Open the first automatic baffle, open the second automatic baffle, and open the third automatic baffle, so that the water storage cavity is connected to the first inlet and outlet water pipe and the second inlet and outlet water pipe respectively, and the water storage cavity is connected upstream and downstream;

[0114] 2. Open the first automatic baffle, open the second automatic baffle, and close the third automatic baffle, so that the water storage cavity is connected to the first inlet and outlet water pipes and the second inlet and outlet water pipes respectively, and the upstream and downstream of the water storage cavity are not connected;

[0115] 3. Close the first automatic baffle, close the second automatic baffle, and close the third automatic baffle, so that the water storage cavity is not connected to the first water inlet pipe and the second water inlet pipe, and the upstream and downstream of the water storage cavity are not connected;

[0116] 4. Close the first automatic baffle, close the second automatic baffle, and open the third automatic baffle, so that the water storage cavity is not connected to the first water inlet pipe and the second water inlet pipe, and the upstream and downstream of the water storage cavity are connected;

[0117] 5. Open the first automatic baffle, close the second automatic baffle, and open the third automatic baffle, so that the water storage cavity is connected to the first water inlet pipe and is not connected to the second water inlet pipe, and the water storage cavity is connected upstream and downstream;

[0118] 6. Open the first automatic baffle, close the second automatic baffle, and close the third automatic baffle, so that the water storage cavity is connected to the first water inlet pipe, but not to the second water inlet pipe, and the upstream and downstream of the water storage cavity are not connected;

[0119] 7. Close the first automatic baffle, open the second automatic baffle, and close the third automatic baffle, so that the water storage cavity is disconnected from the first water inlet pipe and connected to the second water inlet pipe, and the upstream and downstream of the water storage cavity are disconnected.

[0120] 8. Close the first automatic baffle, open the second automatic baffle, and open the third automatic baffle, so that the water storage cavity is disconnected from the first water inlet pipe and connected to the second water inlet pipe, and the water storage cavity is connected upstream and downstream.

[0121] The steps to obtain a decision solution also include:

[0122] Rainfall Condition CollectionΩ2 There are m rainfall conditions, and the rainfall condition set Ω 2 And its corresponding m rainfall conditions are combined into Ω 2 =(e 1 , e 2 ,…,e m ), e i Represents one of the rainfall conditions, i = (1, 2, ..., m); determine the decision corresponding to the i-th rainfall condition from the database system, and establish the following decision matrix A ij :

[0123]

[0124] Among them, a i j is the decision corresponding to the i-th rainfall condition under dimension j;

[0125] According to the following formula, the sum of the decision scores C of all rainfall conditions i under dimension j is calculated respectively: j , j = (1, 2, ..., p); the formula is:

[0126]

[0127] Identify all C j The maximum value C x , C x The corresponding decision is the optimal decision for rainfall condition i. The work of each baffle is controlled by the optimal decision plan to realize the control of water storage and water release of each water inlet pipe, and water is stored through the water storage cavity under the premise of ensuring that there will be no overflow. The present invention adopts a source and process infiltration system to effectively increase the local groundwater volume, reduce the flow in the rainwater pipe, delay the flood peak, reduce the size of the pipes along the line and downstream, and can solve the outstanding problems of slow infiltration, easy blockage and difficult maintenance of conventional infiltration facilities, and has strong practicality.

[0128] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A replaceable municipal road rainwater infiltration system, characterized in that: It includes a municipal road rainwater infiltration belt, wherein the municipal road rainwater infiltration belt is single or multiple and coaxially arranged; The municipal road rainwater infiltration belt comprises a rainwater filtration layer, a water storage cavity and a rainwater infiltration layer arranged in sequence from top to bottom; The rainwater infiltration belt is arranged in parallel with the municipal road, and the rainwater infiltration belt is arranged in the middle or on both sides of the municipal road; The rainwater filtration layer and the rainwater penetration layer are prefabricated respectively; The water storage cavity is connected to the rainwater pre-buried pipes on both sides through a plurality of first water inlet pipes or water outlet pipes and a second water inlet pipe or water outlet pipe respectively; The municipal road has a certain slope in the transverse direction; The rainwater infiltration belt is arranged at the lowest position of the transverse slope of the municipal road and is arranged in a longitudinal strip along the municipal road; The rainwater infiltration zone meets the maximum rainwater flow load requirements under the design environment; The rainwater filter layer includes a plurality of single filter plates, and the plurality of single filter plates are spliced ​​into a rainwater filter layer; The filter plate is composed of several layers of filter media, and any two adjacent filter media layers are connected by a water-permeable barrier medium spacer; The rainwater infiltration layer includes a plurality of single infiltration plates, and the plurality of single infiltration plates are spliced ​​into the rainwater infiltration layer; The permeable plate is composed of a plurality of permeable medium layers, and any two adjacent permeable medium layers are connected by a water-permeable barrier medium spacer; The system further comprises: a third automatic baffle is provided at every 100 m in the water storage cavity; A first automatic baffle and a second automatic baffle are respectively provided between the water storage cavity and the first water inlet pipe or water outlet pipe and the second water inlet pipe or water outlet pipe, and a third automatic baffle is provided in the water storage cavity between the first water inlet pipe or water outlet pipe and the second water inlet pipe; A first flow liquid level sensor, a second flow liquid level sensor and a third flow liquid level sensor are respectively arranged at the first water inlet pipe or the water outlet pipe, the second water inlet pipe or the water outlet pipe and the water storage cavity, and the first flow liquid level sensor, the second flow liquid level sensor and the third flow liquid level sensor detect the flow information, the liquid level information and the time information at a specific flow or liquid level of the setting point; The water inflow V of the road rainwater infiltration system is obtained. The water inflow V is calculated by the following formula: Among them, T is the first rainfall duration, q is the rainstorm intensity, Ao is the area directly subjected to rainfall by the facility, A is the facility service area, Ψ is the runoff coefficient, t is the second rainfall duration, and 1.25 is the safety factor; The infiltration volume Vp of the road rainwater infiltration system is obtained. The infiltration volume Vp is calculated by the following formula: In p =3 600tKJA s Among them, K is the permeability coefficient of the permeable layer, J is the hydraulic gradient, and As is the effective permeable area; Obtain the road rainwater storage volume Vs, which is calculated using the following formula: Where As is the area of ​​the maximum rainfall that can be temporarily stored on the road surface per unit length, and L is the length of the road; The water inflow V, permeation volume Vp, and water storage volume Vs have the following corresponding relationship: V = Vp + Vs; Respectively obtain flow information, liquid level information, and time information at a specific flow or liquid level detected by the first flow liquid level sensor, the second flow liquid level sensor, and the third flow liquid level sensor; Based on several indicators including the water inflow V, the permeation volume Vp, the water storage volume Vs, the flow information, and the time information at a specific flow or liquid level, an optimal decision scheme is obtained to control the first automatic baffle, the second automatic baffle, and the third automatic baffle; The steps of obtaining a decision solution include: The rainfall condition set Ω2 has m rainfall conditions. The rainfall condition set Ω2 and its corresponding m rainfall conditions are combined into Ω2 = (e1, e2, ..., e m ), e i Represents one of the rainfall conditions, i = (1, 2, ..., m); determine the decision corresponding to the i-th rainfall condition from the database system, and establish the following decision matrix A ij : Among them, a ij is the decision corresponding to the i-th rainfall condition under dimension j; According to the following formula, the sum of the decision scores C of all rainfall conditions i under dimension j is calculated respectively: j , j = (1, 2, ..., p); the formula is: Identify all C j The maximum value C x , C x The corresponding decision is the optimal decision for rainfall condition i.

2. A construction method for a replaceable municipal road rainwater infiltration system as claimed in claim 1, characterized in that: The following steps are involved: Obtain the slope information of the municipal road and determine the side with the lower slope of the municipal road; On the side of the municipal road with a lower slope, trenches are dug to form multiple tunnels, and a rainwater infiltration layer is set at the bottom of the tunnels; A rainwater filtration layer is arranged on the surface of the tunnel, so that a water storage cavity is formed between the rainwater infiltration layer and the rainwater filtration layer; The position of the rainwater pre-buried pipe in the municipal road is determined, and the rainwater pre-buried pipe is connected to the water storage cavity through the first water inlet pipe or the water outlet pipe and the second water inlet pipe or the water outlet pipe respectively.

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