Rainwater collection and comprehensive utilization system for box girder type viaduct

Abstract

The invention relates to a box girder type viaduct rainwater collection and comprehensive utilization system which comprises a water storage chamber and a filter chamber. Green belts are arranged at the bottoms of the bridge piers; the filter chamber and the water storage chamber are arranged in the elevated main body; a drainage pipe is connected to the bottom of the water storage chamber; the water level sensor is connected with a PLC (Programmable Logic Controller); the drainage pipe is connected with an electromagnetic valve, and the other end of the electromagnetic valve is connected with an irrigation pipe which extends into the green belt; a two-way pipe is connected between the drain pipes, the side wall of the two-way pipe is connected with a wastewater pipe, and the top of the wastewater pipe is connected with an electromagnetic valve. The device has the beneficial effects that the filtering device can ensure the standard of irrigation water quality, rainwater is guided into the green belt under the bridge for irrigation, the pressure of an urban road pipe network is reduced, and the cost of urban road construction is also reduced; extra power consumption is avoided, and the construction and maintenance cost is low; the water level sensor automatically detects the water volume condition in the water storage chamber to switch the drainage mode of the drainage pipe, and excessive irrigation is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of rainwater recycling, and particularly relates to a comprehensive utilization system for rainwater collection of a box girder viaduct. Background Art

[0002] In order to quickly drain the accumulated water on the bridge deck and prevent rainwater from accumulating on the bridge deck and seeping into the beam body, which may affect the durability of the bridge, during the design of the bridge, in addition to setting longitudinal and transverse slopes for drainage on the bridge deck, a certain number of drain pipes need to be set on the bridge deck to form a complete drainage system. The types of drain pipes generally include metal drain pipes, reinforced concrete drain pipes, transverse drainage pipes, etc. The bridge deck drainage system should be provided with longitudinal and transverse slopes and drain holes to reduce the accumulated water on the bridge deck and achieve the purpose of combining prevention and drainage.

[0003] With the increasing frequency of heavy rains in various places, the problem of bridge deck drainage of urban viaducts has attracted high attention from people. It is particularly important to improve the existing drainage system of urban viaducts and develop new drainage systems. Since urban viaducts are relatively long and in a relatively enclosed environment, the water flow exchange with the outside world can only enter the drainage pipeline through the rainwater inlets set on the bridge deck and finally enter the municipal pipeline under the bridge. At present, the general drainage method of the bridge deck drainage system of urban viaducts is that the water flow on the bridge deck converges through the longitudinal and transverse slopes and then enters the rainwater inlet, and then enters the drainage pipeline. Finally, it enters the ground drainage facilities or rivers through the drainage vertical pipe. The traditional bridge deck drainage system of viaducts mainly consists of four parts: the longitudinal and transverse slopes of the bridge deck, the cross-sectional area of water flow, the rainwater inlet device, and the pipeline system. Most of the existing viaduct drainage uses a drainage system. The rainwater is filtered and then flows into the storage pool for use in municipal engineering and other aspects, but there are problems such as easy aging of water pipes, waste of water resources, and high maintenance costs.

[0004] Therefore, there is an urgent need to invent a comprehensive utilization system for rainwater collection of a box girder viaduct that can effectively remove a large amount of impurities and harmful substances in rainwater, has low construction and maintenance costs, and controllable drainage volume. Summary of the Invention

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a comprehensive utilization system for rainwater collection of a box girder viaduct.

[0006] This comprehensive utilization system for rainwater collection of a box girder viaduct includes a water storage chamber and a filtration chamber; there is a green belt between the bottoms of the bridge piers, and roadbeds are provided on both sides of the green belt; a bearing platform is provided at the bottom of the bridge piers; the bridge piers support an elevated main body; the filtration chamber and the water storage chamber are arranged in the elevated main body; a filter media layer is arranged in the filtration chamber; a water level sensor is arranged in the water storage chamber, and a drain pipe is connected to the bottom; the water level sensor is connected to a PLC controller; the drain pipe is connected to a solenoid valve, and the other end of the solenoid valve is connected to an irrigation pipe, and the irrigation pipe extends into the interior of the green belt; a double-pass pipe is connected between the drain pipes, a waste water pipe is connected to the side wall of the double-pass pipe, and a solenoid valve is connected to the top of the waste water pipe.

[0007] Preferably, two filter chambers are symmetrically arranged on both sides inside the elevated main body 1, and three water storage chambers are arranged in the middle; a water outlet is arranged at the top of the filter chamber and connected to the bridge deck of the elevated main body; the filter material layer in the filter chamber includes a fine sand layer and a gravel layer from top to bottom, and a water passing port is arranged on one side at the bottom of the gravel layer, and the other end of the water passing port is connected to the water storage chamber; a water passing port runs through between the water storage chambers; a water level sensor is connected to the inner side wall of the water storage chamber, and a drain port is arranged at the bottom, and the other end of the drain port is connected to a drain pipe.

[0008] Preferably, a drain pipe is arranged on the outer side of the pier 6; the drain pipes are axially symmetrically distributed according to the pier; the top of the drain pipe is connected to the water storage chamber, and the bottom is connected to an irrigation pipe; a solenoid valve is arranged at the connection between the irrigation pipe and the drain pipe; a double-pass pipe is communicated between the bottom side walls of the drain pipes, and a waste water pipe is vertically connected to the middle side wall of the double-pass pipe, and the top of the waste water pipe is connected to a solenoid valve.

[0009] Preferably, a planting soil layer, a mud isolation geotextile, a cinder permeable layer, a pebble layer, a composite anti-seepage geotextile and a plain soil base layer are sequentially arranged below the green belt 3; the composite anti-seepage geotextile is fully paved and extends under the curb; the end of the irrigation pipe is equipped with a nozzle.

[0010] The working method of this box girder type elevated bridge rainwater collection and comprehensive utilization system includes the following steps:

[0011] S1. The rainwater on the elevated bridge flows into the filter chamber, and the water quality reaches the standard for green belt irrigation after being filtered by the filter material layer;

[0012] S2. The rainwater on the elevated bridge flows into the water storage chamber; then it flows into the drain pipe;

[0013] S3. When the set high water level is reached, the PLC controller controls the solenoid valve of the irrigation pipe to close and the solenoid valve of the waste water pipe to open, and introduces the rainwater into the waste water pipe; when the set medium water level is reached, the PLC controller controls the solenoid valve of the irrigation pipe to open and the solenoid valve of the waste water pipe to close, and introduces the rainwater into the irrigation pipe to irrigate the green belt; when the set low water level is reached, the PLC controller controls all solenoid valves to close;

[0014] S4. The rainwater on the elevated bridge entering the waste water pipe overflows into the municipal drainage system.

[0015] Preferably, in step S3, a nozzle is provided at the bottom of the irrigation pipe; the water level sensor is connected to a PLC controller; the PLC controller controls the opening and closing of the solenoid valve. When the set high water level is reached, the PLC controller controls the solenoid valve of the irrigation pipe to close and the solenoid valve of the wastewater pipe to open, introducing rainwater into the wastewater pipe; when the set medium water level is reached, the PLC controller controls the solenoid valve of the irrigation pipe to open and the solenoid valve of the wastewater pipe to close, introducing rainwater into the irrigation pipe. The rainwater is converted from gravitational potential energy into kinetic energy and flows to the nozzle to irrigate the green belt; when the set low water level is reached, all solenoid valves are closed to store water.

[0016] Preferably, in step S3, the top of the drain pipe is connected to the water storage chamber, and the bottom is connected to an irrigation pipe; a solenoid valve is provided at the connection between the irrigation pipe and the drain pipe; a double-pass pipe is connected between the bottom side walls of the drain pipe. A wastewater pipe is vertically connected to the middle side wall of the double-pass pipe; a solenoid valve is connected to the top of the wastewater pipe; the double-pass pipe is a safety diversion chamber, which, in cooperation with the solenoid valve, diverts rainwater into two streams, one flowing into the irrigation pipe and the other flowing into the drain pipe.

[0017] The beneficial effects of the present invention are:

[0018] 1) The present invention can effectively remove a large amount of impurities and harmful substances in rainwater through the filtering device, ensuring the irrigation water quality standard. The rainwater is led to the green belt under the bridge for irrigation, reducing the pressure on the urban road pipe network and also reducing the cost of urban road construction. Moreover, the whole process converts the self-flow potential energy of rainwater into the kinetic energy required for irrigation without additional power consumption, and the construction and maintenance costs are low.

[0019] 2) In the present invention, the water level sensor automatically detects the water volume in the water storage chamber. At the same time, the PLC controller connected to the water level sensor can control the opening and closing operation of the solenoid valve, so as to switch the drainage mode of the drain pipe. When the rainfall is too large, the solenoid valve is controlled to discharge the collected rainwater through the wastewater pipe, thus avoiding excessive irrigation. Description of the Drawings

[0020] Figure 1 is the overall front view of the present invention;

[0021] Figure 2 is the overall sectional structure schematic diagram of the present invention;

[0022] Figure 3 is the rainwater filtration flow chart of the present invention.

[0023] Description of the reference numerals: elevated main body 1, drain pipe 2, green belt 3, roadbed 4, bearing platform 5, bridge pier 6, filtration chamber 101, water storage chamber 102, water level sensor 103, water outlet 104, fine sand layer 1011, gravel layer 1012, drain outlet 1021, water passing port 1022, irrigation pipe 201, wastewater pipe 202, solenoid valve 203, double-pass pipe 204. Detailed implementation manners

[0024] The present invention will be further described below in conjunction with embodiments. The descriptions of the following embodiments are only used to help understand the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0025] Embodiment 1

[0026] As an embodiment, a comprehensive utilization system for rainwater collection of a box girder viaduct is proposed, which includes a water storage chamber 102 and a filtration chamber 101; a green belt 3 is provided between the bottoms of the bridge piers 6, and roadbeds 4 are provided on both sides of the green belt 3; a bearing platform 5 is provided at the bottom of the bridge pier 6; an elevated main body 1 is erected on the bridge pier 6; the filtration chamber 101 and the water storage chamber 102 are arranged in the elevated main body 1; a filter media layer is arranged in the filtration chamber 101; a water level sensor 103 is arranged in the water storage chamber 102, and a drain pipe 2 is connected to the bottom; the drain pipe 2 is connected with a solenoid valve 203, the other end of the solenoid valve 203 is connected with an irrigation pipe 201, and the irrigation pipe 201 extends into the interior of the green belt 3; a double-pass pipe 204 is connected between the drain pipes 2, a waste water pipe 202 is connected to the side wall of the double-pass pipe 204, and a solenoid valve 203 is connected to the top of the waste water pipe 202.

[0027] As Figure 1 and Figure 2 shown, two water storage chambers 102 are arranged inside the elevated main body 1, and a filtration chamber 101 is arranged on one side of each of the two water storage chambers 102. Among them, a water inlet 104 is arranged above the filtration chamber 101, and the water inlet 104 extends to the surface of the elevated main body 1. Rainwater enters the interior of the filtration chamber 101 through the water inlet 104 and is filtered through the sand and gravel medium layer. Most pollutants are intercepted on the upper surface of the medium layer, and fine dirt and other floating organic matters are intercepted inside the medium layer to ensure that the treated water quality meets the standard for green belt irrigation. A bridge pier 6 is arranged below the elevated main body 1, a drain pipe 2 is arranged on the outer side of the bridge pier 6, a green belt 3 is arranged between the bottoms of the bridge piers 6, roadbeds 4 are arranged on both sides of the green belt 3, a bearing platform 5 is arranged at the bottom of the bridge pier 6, a filter media layer is arranged inside the filtration chamber 101, and the filter media layer includes a fine sand layer (1011) and a sand and gravel layer (1012). A water passing port 1022 is arranged on one side of the bottom of the sand and gravel layer (1012). The water storage chamber 102 and the filtration chamber 101 are communicated through the water passing port 1022. Below the green belt 3, a planting soil layer, a mud isolation geotextile, a cinder permeable layer, a pebble layer, a composite anti-seepage geotextile and a plain soil base layer are arranged in sequence. Among them, the composite anti-seepage geotextile is fully paved and extends under the curbstone to prevent rainwater from seeping into the roadbed and avoid water stability damage to the roadbed; the pebble layer is an aquifer, and after receiving the rainwater in the filter well, the rainwater is infiltrated upward through the cinder permeable layer.

[0028] Inside the water storage chamber 102, a water level sensor 103 is provided. At the bottom of the water storage chamber 102, a drain outlet 1021 is provided. Among them, the drain pipe 2 is connected to the water storage chamber 102 through the drain outlet 1021. The drain pipe 2 includes an irrigation pipe 201 and a waste water pipe 202. Among them, an electromagnetic valve 203 is provided on the outer surface of the irrigation pipe 201. Above the electromagnetic valve 203, a two-way pipe 204 is provided. The irrigation pipes 201 are connected through the two-way pipe 204. The waste water pipe 202 is welded to the two-way pipe 204. The irrigation pipe 201 extends into the interior of the green belt 3.

[0029] The water level sensor 103 detects the water volume inside the water storage chamber 102, thereby judging the current rain type and rainfall amount. At the same time, the water level sensor 103 can also control the opening and closing operation of the electromagnetic valve 203. In this way, the drainage mode of the drain pipe 2 can be switched. When the rainfall is too large, the electromagnetic valve 203 is closed, and the collected rainwater is discharged through the waste water pipe 202. In this way, excessive irrigation can be avoided.

[0030] Embodiment Two

[0031] As another embodiment, this Embodiment Two is proposed on the basis of Embodiment One. A working method of a rainwater collection and comprehensive utilization system for a box girder viaduct includes the following steps:

[0032] S1. The rainwater on the viaduct flows into the filtration chamber 101, and the water quality reaches the standard for green belt irrigation after being filtered by the filter material layer;

[0033] S2. The rainwater on the viaduct flows into the water storage chamber 102; and then flows into the drain pipe 2;

[0034] S3. When the set high water level is reached, the PLC controller controls the electromagnetic valve 203 of the irrigation pipe 201 to close, and controls the electromagnetic valve 203 of the waste water pipe 202 to open, and introduces the rainwater into the waste water pipe 202; when the set medium water level is reached, the PLC controller controls the electromagnetic valve 203 of the irrigation pipe 201 to open, and controls the electromagnetic valve 203 of the waste water pipe 202 to close, and introduces the rainwater into the irrigation pipe 201 to irrigate the green belt 3; when the set low water level is reached, the PLC controller controls all electromagnetic valves 203 to close;

[0035] S4. The rainwater on the viaduct that enters the waste water pipe 202 overflows into the municipal drainage system.

[0036] Such as Figure 3As shown in the figure, the rainwater on the viaduct flows into the rainwater inlet on the bridge deck and then enters the filtration chamber 101. The filtration chamber 101 includes a sand and gravel medium layer. The rainwater on the viaduct flows to the water storage chamber 102 after filtration. A water level sensor 103 is installed in the water storage chamber to judge the amount of rainfall. The water level sensor 103 is equipped with a PLC controller to control the opening and closing of the solenoid valve 203. According to the amount of rainfall, the PLC controller has high water level, medium water level and low water level. Subsequently, the rainwater on the viaduct flows to the safety diverter, and the safety diverter is provided with a solenoid valve 203. When the rainwater on the viaduct passes through the solenoid valve 203, when the set high water level is reached, the PLC controller controls the solenoid valve 203 of the irrigation pipe 201 to close and controls the solenoid valve 203 of the waste water pipe 202 to open, introducing the rainwater into the waste water pipe 202. When the set medium water level is reached, the PLC controller controls the solenoid valve 203 of the irrigation pipe 201 to open and controls the solenoid valve 203 of the waste water pipe 202 to close, introducing the rainwater into the irrigation pipe 201. After the gravitational potential energy is converted into kinetic energy, it flows to the end of the irrigation pipe 201, and a nozzle is arranged at the end to irrigate the green belt 3. When the set low water level is reached, all solenoid valves 203 are closed to store water.

[0037] It should be noted that the parts that are the same or similar to those in the first embodiment in this embodiment can be referred to each other and will not be described in detail in this application.

[0038] In this specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

Claims

1. A box girder type viaduct rainwater collection and comprehensive utilization system, characterized in that: It includes a water storage chamber and a filter chamber; a green belt is provided between the bottom of the piers, and roadbeds are provided on both sides of the green belt; a pedestal is provided at the bottom of the piers; an elevated main body is provided on the pier frame; the filter chamber and the water storage chamber are arranged in the elevated main body; a filter material layer is provided in the filter chamber; a water level sensor is provided in the water storage chamber, and a drainage pipe is connected to the bottom; the water level sensor is connected to a PLC controller; the drainage pipe is connected to a solenoid valve, and the other end of the solenoid valve is connected to a irrigation pipe, and the irrigation pipe extends to the inside of the green belt; a double-way pipe is connected between the drainage pipes, a wastewater pipe is connected to the side wall of the double-way pipe, and a solenoid valve is connected to the top of the wastewater pipe.

2. The box girder type viaduct rainwater collection and comprehensive utilization system according to claim 1 is characterized in that: Two filter chambers are symmetrically arranged on both sides of the elevated main body, and three water storage chambers are arranged in the middle; a drain outlet is arranged on the top of the filter chamber and connected to the elevated main bridge deck; the filter material layer in the filter chamber includes a fine sand layer and a gravel layer from top to bottom, and a water inlet is arranged on one side of the bottom of the gravel layer, and the other end of the water inlet is connected to the water storage chamber; water inlets are passed through the water storage chambers; a water level sensor is connected to the inner wall of the water storage chamber, and a drain outlet is arranged at the bottom, and the other end of the drain outlet is connected to a drain pipe.

3. The box girder type viaduct rainwater collection and comprehensive utilization system according to claim 1 is characterized in that: A drainage pipe is provided on the outside of the pier; the drainage pipe is symmetrically distributed along the axis of the pier; the top of the drainage pipe is connected to the water storage chamber, and the bottom is connected to the irrigation pipe; a solenoid valve is provided at the connection between the irrigation pipe and the drainage pipe; a two-way pipe is connected between the side walls at the bottom of the drainage pipe, a wastewater pipe is vertically connected to the middle side wall of the two-way pipe, and a solenoid valve is connected to the top of the wastewater pipe.

4. The box girder type viaduct rainwater collection and comprehensive utilization system according to claim 1 is characterized in that: Below the green belt, there are planting soil layer, mud isolation geotextile, cinder infiltration layer, pebble layer, composite anti-seepage geomembrane and plain soil base layer in sequence; the composite anti-seepage geomembrane is fully spread and extends to under the curb; a sprinkler is installed at the end of the irrigation pipe.

5. The working method of the box girder type viaduct rainwater collection and comprehensive utilization system according to claim 1 is characterized in that: The following steps are involved: S1. Rainwater from the viaduct flows into the filter chamber, and after being filtered through the filter material layer, the water quality reaches the standard for green belt irrigation; S2, rainwater from the viaduct flows into the water storage chamber and then into the drainage pipe; S3. When the set high water level is reached, the PLC controller controls the solenoid valve of the irrigation pipe to close and the solenoid valve of the wastewater pipe to open, so that rainwater is introduced into the wastewater pipe; when the set middle water level is reached, the PLC controller controls the solenoid valve of the irrigation pipe to open and the solenoid valve of the wastewater pipe to close, so that rainwater is introduced into the irrigation pipe to irrigate the green belt; when the set low water level is reached, the PLC controller controls all solenoid valves to close; S4. Rainwater from the elevated bridge that enters the wastewater pipe overflows into the municipal drainage system.

6. The working method of the box girder type viaduct rainwater collection and comprehensive utilization system according to claim 5 is characterized in that: In step S3, a nozzle is provided at the bottom of the irrigation pipe; the water level sensor is connected to a PLC controller; the PLC controller controls the opening and closing of the solenoid valve. When the set high water level is reached, the PLC controller controls the solenoid valve of the irrigation pipe to close, controls the solenoid valve of the wastewater pipe to open, and introduces rainwater into the wastewater pipe; when the set middle water level is reached, the PLC controller controls the solenoid valve of the irrigation pipe to open, controls the solenoid valve of the wastewater pipe to close, and introduces rainwater into the irrigation pipe. The rainwater is converted into kinetic energy through gravitational potential energy, flows to the nozzle, and irrigates the green belt; when the set low water level is reached, all solenoid valves are closed to achieve water storage.

7. The working method of the box girder type viaduct rainwater collection and comprehensive utilization system according to claim 5 is characterized in that: In step S3, the top of the drainage pipe is connected to the water storage chamber, and the bottom is connected to the irrigation pipe; a solenoid valve is provided at the connection between the irrigation pipe and the drainage pipe; a two-way pipe is connected between the side walls at the bottom of the drainage pipe, and a wastewater pipe is vertically connected to the middle side wall of the two-way pipe; the top of the wastewater pipe is connected to the solenoid valve; the two-way pipe is a safety diversion chamber, which cooperates with the solenoid valve to divert rainwater into two streams, one stream flows into the irrigation pipe, and the other stream flows into the drainage pipe.

Images