Green construction method for rainwater collection and cyclic utilization of construction production and domestic wastewater

Abstract

The invention relates to the field of green construction methods, and discloses a green construction method for rainwater collection and construction production and domestic wastewater recycling, which comprises the following steps: S1, deepening design and material manufacturing; s2, determining parameters and selecting types of machines and tools; s3, paying off, excavating and installing a system; s4, connecting pipelines; s5, installing a siphon drainage system; s6, a multifunctional dust falling and automatic control system device is installed; s7, earthwork backfilling construction is conducted; s8, debugging and operating a dust falling system; and S9, debugging and operating the circulating system. According to the system, rainwater, construction production wastewater and domestic wastewater are systematically collected and circularly used for greening maintenance, concrete maintenance, car washing, toilet flushing, dust raising control and other construction scenes after being treated, dependence on a municipal water supply pipe network is greatly reduced, water resource consumption is reduced, and the system is particularly suitable for the water-saving requirement of long-term construction of a large project; and the core requirement of water saving in green construction is met.

Description

Technical Field

[0001] The present invention relates to the technical field of green construction methods, and in particular to a green construction method for rainwater collection and recycling of construction production and domestic wastewater. Background Art

[0002] Against the backdrop of the deepening promotion of the global sustainable development concept and the consensus on the "dual carbon" goals, the construction industry, as a key area of ​​resource consumption and environmental impact, is facing an urgent need to transform from traditional extensive construction to green and intensive construction.

[0003] The country has successively issued policies such as the "Green Building Evaluation Standards" and the "Green Construction Evaluation Standards for Buildings and Municipal Engineering", which clearly require the construction process to achieve "four savings and one environmental protection" (energy saving, land saving, water saving, material saving and environmental protection), and promote the upgrading of construction technology to low consumption, low emissions and high efficiency. The traditional construction model of "focusing on construction and neglecting environmental protection" and "focusing on use and neglecting recycling" can no longer meet the industry's high-quality development needs.

[0004] In traditional construction, rainwater, construction wastewater and domestic wastewater are mostly discharged directly into the municipal pipeline network after simple sedimentation, and recycling is not achieved; greening maintenance, concrete maintenance, car washing, dust control and other links in construction rely on tap water from the municipal water supply network. Especially for large-scale projects with long construction periods, the problem of water resource waste is prominent; at the same time, the unorganized active drainage rainwater collection system on the basement roof is not installed before the basement backfill, and re-excavation and installation are prone to landslide risks and additional costs. Summary of the Invention

[0005] In order to make up for the above shortcomings, the present invention provides a green construction method for rainwater collection and recycling of construction production and domestic wastewater, which solves the problem of recycling rainwater, muddy water and domestic wastewater during construction and saves water resources.

[0006] In order to achieve the above objectives, the present invention adopts the following technical solution: a green construction method for rainwater collection and recycling of construction production and domestic wastewater, comprising the following steps:

[0007] S1: Deepen the design of the basement roof's unorganized active drainage rainwater collection system, manufacture the system and drainage ditches and sedimentation tanks made of the same material, and laminate the tops of the drainage ditches and sedimentation tanks with geotextiles to form a drainage, sedimentation, and filtration composite material.

[0008] S2: Based on the location, elevation, and weight of the unorganized active drainage rainwater collection system on the basement roof in the detailed drawing, determine the basement excavation, cushion layer pouring bottom elevation, and installation equipment;

[0009] S3: After laying out the lines, excavate the drainage ditch, sedimentation tank device and basement to the set bottom elevation, pour the cushion layer after the trough inspection, and transport the basement roof unorganized active drainage rainwater collection system to the installation location;

[0010] S4: Connect the construction and production drainage pumps and domestic wastewater drainage pipes to the drainage ditch, the water inlet of the sedimentation tank device, and the recharge well. Connect the car wash station, sprinkler head, and toilet water inlet pipes to the water outlet of the sedimentation tank device, the automatic self-priming pump, the basement roof unorganized active drainage rainwater collection system, and the high-power booster pump. Connect the overflow pipe to the municipal pipe network.

[0011] S5: Install the siphon drainage system. After completing the construction of the basement roof and side wall structures, connect the siphon drainage pipe to the sedimentation observation well and the basement roof unorganized active drainage rainwater collection system;

[0012] S6: Install a multifunctional dust suppression and automatic control system: Arrange dust removal water pipelines and connect them to a high-power pressure pump, a mobile water spray cannon, an atmospheric monitoring display screen, and a control box. Install sprinkler heads every 10 meters on the walls, and drill sprinkler holes on the tower crane dust removal water pipeline.

[0013] S7: Backfill the fire passage in layers and compact it. Use a bulldozer to backfill areas such as the basement ventilation observation pipe, and manually backfill within 1000mm around it.

[0014] S8: Debug the dust suppression system. Use the atmospheric monitoring data to trigger the alarm / light and dust suppression equipment. The system will automatically stop when the standard is met. The error is allowed to be ±3s. Repeat the above steps until the monitoring data meets the standard.

[0015] S9: Debug the automatic self-priming pump and the construction and production drainage pump. After debugging and stabilization, realize the recycling of rainwater, construction and production, and domestic wastewater.

[0016] As a further description of the above technical solution:

[0017] In the drainage, sedimentation and filtration composite material in step S1, the geotextile is sealed and laminated with the top edge of the drainage ditch and sedimentation tank device by hot melt adhesive.

[0018] As a further description of the above technical solution:

[0019] In step S2, the selection criteria for the installation equipment include: when the single unit weight of the basement roof unorganized active drainage rainwater collection system is greater than or equal to 5t, a truck crane with a lifting capacity greater than or equal to 8t is selected, and the load capacity of the transport truck is greater than or equal to 10t.

[0020] As a further description of the above technical solution:

[0021] In step S3, the basement roof unorganized active drainage rainwater collection system is transported to the installation location by a transport vehicle, and then transported to the installation location by a car crane.

[0022] As a further description of the above technical solution:

[0023] In step S4, a grid filter is provided at the water inlet, the mesh diameter of the grid filter is 5-10 mm, and the grid filter is detachably connected to the drainage ditch, and the sprinkler head includes a greening maintenance sprinkler head and a concrete maintenance sprinkler head.

[0024] As a further description of the above technical solution:

[0025] In step S5, the basement roof and side wall related structures include the basement roof, side wall waterproof membrane, steel wire fine stone concrete protective layer, siphon drainage trough, composite polymer protective drainage special-shaped sheet, geotextile, breathable observation tube, siphon drainage pipe and sedimentation observation well.

[0026] As a further description of the above technical solution:

[0027] In step S6, the dust removal water supply pipeline adopts a Φ18mm PVC pipe, and the diameter of the spray holes on the dust removal water supply pipeline is 1-2mm and is evenly distributed along the circumference of the pipeline.

[0028] As a further description of the above technical solution:

[0029] In step S7, a road roller is used to compact the backfilled soil.

[0030] As a further description of the above technical solution:

[0031] In step S8, the monitoring parameters of the atmospheric monitor include PM2.5 and PM10. When the monitoring values ​​exceed 0.075 mg / m³ and 0.15 mg / m³ respectively, the alarm / light and dust reduction equipment are automatically triggered.

[0032] As a further description of the above technical solution:

[0033] In step S9, the outlet pressure of the automatic self-priming pump is set to 0.2-0.3 MPa, and a check valve is provided between the pipelines of each water point to prevent water backflow.

[0034] The present invention has the following beneficial effects:

[0035] 1. In the present invention, the basement roof's unorganized active drainage rainwater collection system, drainage ditch, sedimentation tank device and geotextile are combined into a drainage, sedimentation and filtration composite material to simultaneously achieve rainwater collection and wastewater treatment; by systematically collecting rainwater, construction and production wastewater (such as construction downflow drainage, car washing wastewater) and domestic wastewater (such as shower and toilet wastewater), after treatment, they are recycled for use in construction scenarios such as greening maintenance, concrete maintenance, car washing, toilet flushing, and dust control, greatly reducing dependence on the municipal water supply network and lowering water resource consumption. This is particularly suitable for the water-saving needs of long-term construction of large-scale projects, meeting the core requirement of "water saving" in "green construction".

[0036] 2. In the present invention, the unorganized active drainage rainwater collection system on the basement roof is installed before the basement is backfilled, which effectively controls the project cost and avoids the risk of landslides and additional costs caused by re-excavation in the later stage; rainwater, muddy water and domestic wastewater are reliably treated to avoid environmental pollution, and wastewater is used instead of tap water to reduce municipal water fee expenditure, thereby reducing costs and increasing efficiency.

[0037] 3. The dust reduction system is linked to the control box through the atmospheric monitoring instrument to automatically start and stop the dust reduction equipment, and the response error is controlled within ±3s to ensure accurate and efficient dust control; the water pump, sprinkler and other circulation systems run automatically after debugging, reducing manual intervention, avoiding construction interruptions caused by improper human operation, and improving the overall construction progress. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic elevation view of the green construction method for rainwater collection and recycling of construction production and domestic wastewater in the present invention;

[0039] Figure 2 This is a schematic diagram of the installation of the multifunctional dust reduction and automatic control system device of the present invention;

[0040] Figure 3 This is a schematic diagram of the installation of a construction and production drainage pump in the present invention;

[0041] Figure 4 This is a schematic diagram of the structure of the siphon drainage system of the present invention;

[0042] Figure 5 Schematic diagram of the installation of the unorganized active drainage rainwater collection system on the basement roof of the present invention;

[0043] Figure 6 Schematic diagram of backfilling of the basement roof in the present invention.

[0044] Figure 1: 1. Unorganized active drainage rainwater collection system on the basement roof; 2. Drainage ditch; 3. Sedimentation tank device; 4. Geotextile; 5. Alarm / warning light; 6. Basement; 7. Pad layer; 8. Concrete maintenance sprinkler; 9. Transport vehicle; 10. Construction and production drainage pump; 11. Drain hose; 12. Shower room; 13. Domestic wastewater drainage pipe; 14. Water inlet; 15. Recharge well; 16. Car wash station; 17. Greening maintenance sprinkler; 18. Toilet; 19. Road roller; 20. Water outlet; 21. Automatic self-priming Pump; 22. Truck crane; 23. Overflow pipe; 24. Waterproof membrane; 25. Steel wire fine stone concrete protective layer; 26. Siphon drainage trough; 27. Composite polymer protective drainage special-shaped sheet; 28. Breathable observation tube; 29. ​​Siphon drainage pipe; 30. Sedimentation observation well; 31. Dust removal water supply pipeline; 32. Fence; 33. Tower crane; 34. High-power pressure pump; 35. Mobile sprinkler cannon vehicle; 36. Atmospheric monitoring instrument; 37. Control box; 38. Sprinkler head; 39. Sprinkler hole; 40. Landscaping; 41. Bulldozer. DETAILED DESCRIPTION

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0046] Example: Refer to Figures 1 to 6 This example uses the construction of a basement and supporting projects in a large residential complex as an example. The project has a total construction area of ​​approximately 150,000 square meters, including a three-story basement, six residential buildings, and outdoor landscaping. The construction period is two years. The project has a large discharge volume of rainwater, construction wastewater (such as foundation pit drainage and car wash wastewater), and domestic wastewater (such as wastewater from workers' showers and temporary toilets). Traditional construction methods have problems such as water waste, inefficient dust control, and delayed installation of the basement roof rainwater collection system. A green construction method using rainwater collection and recycling of construction wastewater and domestic wastewater is adopted. The specific implementation steps are as follows:

[0047] Step S1: Deepen the design and fabricate materials: Deepen the design of the basement roof unorganized active drainage rainwater collection system 1. Determine that the system's main body is a U-shaped reinforced concrete structure. Fabricate a drainage ditch 2 and a sedimentation tank 3 made of the same material. Use 400g / m² polyester filament geotextile 4, which is sealed and laminated to the top edges of the drainage ditch 2 and sedimentation tank 3 using hot melt adhesive to form a composite drainage, sedimentation, and filtration composite material. The composite width is 100mm to ensure a leak-proof seal.

[0048] Step S2: Parameter determination and equipment selection: According to the detailed drawing, the basement 6 excavation bottom elevation is -8.5m, the cushion layer 7 is made of C15 concrete with a pouring thickness of 100mm and a bottom elevation of -8.4m; the basement roof unorganized active drainage rainwater collection system 1 weighs 6t per section, and a 10t lifting capacity truck crane 22 is selected, and the transport vehicle 9 is a 12t load truck;

[0049] Step S3: Laying out, excavating, and installing the system: Use a total station to lay out the foundation pit, drainage ditch 2, and sedimentation tank device 3, with an accuracy of ±5mm; mechanically excavate to the set bottom elevation (-8.5m), and after the trench is inspected and qualified, pour the cushion layer 7 and cure for 7 days; use a transport vehicle 9 to transport the basement roof unorganized active drainage rainwater collection system 1 to the installation location via the basement foundation pit ramp (slope 1:6), and use a truck crane 22 to lift it to the installation point, with a lifting deviation of ≤30mm;

[0050] Step S4: Connecting pipes: Connect and install the drainage, sedimentation, and filtration composite materials of the drainage ditch 2 and the sedimentation tank device 3, connect the construction and production drainage pump 10, the drainage hose 11, and the domestic wastewater drainage pipe 13 of the shower room 12 to the drainage ditch 2, the water inlet 14 of the sedimentation tank device 3, and the recharge well 15, and set a grid filter at the water inlet 14. The mesh diameter of the grid filter is 8 mm and it is detachably connected to the drainage ditch 2; connect the water inlet pipes of the car wash station 16, the greening maintenance sprinkler head 17, the concrete maintenance sprinkler head 8, and the toilet 18 to the water outlet 20 pipe of the sedimentation tank device 3, the automatic self-priming pump 21, the basement roof unorganized active drainage rainwater collection system 1, and the high-power booster pump 34; connect the sedimentation tank device 3 and the basement roof unorganized active drainage rainwater collection system 1 with the municipal rainwater pipe network;

[0051] Step S5: Installing the siphon drainage system: Construction of the basement 6 roof and side walls: Laying 3mm thick SBS waterproof membrane 24, pouring a 50mm thick steel wire fine stone concrete protective layer 25, installing siphon drainage grooves 26, composite polymer protective drainage special-shaped sheets 27, and covering with 400g / m² geotextile 4; installing a breathable observation tube 28, a siphon drainage pipe 29, and a sedimentation observation well 30, and connecting the siphon drainage pipe 29 to the basement roof unorganized active drainage rainwater collection system 1 to ensure smooth drainage;

[0052] Step S6: Install a multifunctional dust suppression and automatic control system: Arrange and install the dust removal water supply pipe 31 to dust removal locations such as the basement 6 roof, the fence 32, and the tower crane 33, and then connect it to the high-power pressure pump 34, the mobile water spray cannon vehicle 35, the atmospheric monitor 36 display screen, and the control box 37; Install a sprinkler head 38 every 10 meters on the fence 32, and drill sprinkler holes 39 around the dust removal water supply pipe 31 on the boom of the tower crane 33 before installing it; The dust removal water supply pipe 31 uses a Φ18mm PVC pipe, and the sprinkler holes 39 on the dust removal water supply pipe 31 have a diameter of 1.5mm, a hole spacing of 6cm, and four rows evenly distributed around the circumference;

[0053] Step S7: Backfilling: The fire passage is backfilled in layers and compacted with a roller 19, starting from one end of the basement and ending at the other. A bulldozer 41 is used to backfill the basement ventilation observation pipe 28, the sedimentation observation well 30, the basement roof unorganized active drainage rainwater collection system 1, and the greening 40. The area 1000 mm around the basement ventilation observation pipe 28 is backfilled manually with the bulldozer 41 to prevent mechanical rolling damage to the pipe.

[0054] Step S8: Debugging and operating the dust reduction system: Debug the dust removal water pipe 31, the high-power pressure pump 34, the mobile water spray cannon vehicle 35, the control box 37, the display screen of the atmospheric monitor 36, and the alarm / warning light 5, and detect and control the multifunctional dust reduction and automatic control system: connect the atmospheric monitor 36 to monitor the data in real time and transmit it to the control box 37, start the alarm / warning light 5, and start or stop the high-power pressure pump 34 and the mobile water spray cannon vehicle 35 through the automatic control system to control dust; when the monitoring data of the atmospheric monitor 36 meets the requirements and is transmitted to the control box 37, the alarm / warning light 5 goes out, and the control system automatically stops the dust reduction work, with an allowable error of ±3s, and controls the operation after confirming safety and stability; the monitoring parameters of the atmospheric monitor 36 include PM2.5 and PM10. When the monitoring values ​​exceed 0.075mg / m³ and 0.15mg / m³ respectively, the alarm / warning light 5 and the dust reduction equipment are automatically triggered; repeat the above steps until the monitoring data of the atmospheric monitor 36 meets the requirements and the control system stops the dust reduction work;

[0055] Step S9: Debugging and operating the circulation system: Debug the automatic self-priming pump 21 and the construction and production drainage pump 10 used for the car wash station 16, greening maintenance sprinkler head 17, toilet 18 flushing, and recharge of the recharge well 15. The water outlet pressure of the automatic self-priming pump 21 is set to 0.25MPa, and a check valve is installed between the pipelines of each water point to prevent water backflow; after confirming safety and stability, the recycling operation of rainwater, construction and production and domestic wastewater is realized.

[0056] Implementation effect:

[0057] Through the above steps, this embodiment realizes the collection of rainwater at the construction site, the efficient recycling of construction production and domestic wastewater, greatly reduces the dependence on the municipal water supply network, solves the problems of water resource waste and environmental pollution in traditional construction, and also solves the problems of inefficient dust control and delayed installation of the basement system.

[0058] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A green construction method for rainwater collection and recycling of construction production and domestic wastewater, characterized by: The following steps are involved: S1: Deepen the design of the unorganized active drainage rainwater collection system (1) on the basement roof, manufacture the system and the drainage ditch (2) and sedimentation tank device (3) made of the same material, and composite the top of the drainage ditch (2) and sedimentation tank device (3) with geotextile (4) to form a drainage, sedimentation, and filtration composite material; S2: Based on the location, elevation and weight of the unorganized active drainage rainwater collection system (1) on the basement roof in the detailed drawing, determine the basement (6) excavation, the cushion layer (7) pouring bottom elevation and installation equipment; S3: After laying out the lines, the drainage ditch (2), the sedimentation tank device (3) and the basement (6) are excavated to the set bottom elevation, the cushion layer (7) is poured after the trough is inspected, and the basement roof unorganized active drainage rainwater collection system (1) is transported to the installation location; S4: Connect the construction and production drainage pump (10), the domestic wastewater drainage pipe (13) to the drainage ditch (2), the water inlet (14) of the sedimentation tank device (3), and the recharging well (15); connect the car wash station (16), the sprinkler head, and the toilet (18) water inlet pipes to the sedimentation tank device (3) outlet (20), the automatic self-priming pump (21), the basement roof unorganized active drainage rainwater collection system (1), and the high-power booster pump (34); and connect the overflow pipe (23) to the municipal pipe network; S5: Install the siphon drainage system: After completing the construction of the basement (6) roof and side wall related structures, connect the siphon drainage pipe (29) to the sedimentation observation well (30) and the basement roof unorganized active drainage rainwater collection system (1); S6: Install a multifunctional dust suppression and automatic control system: Arrange a dust removal water supply pipeline (31) and connect it to a high-power pressure pump (34), a mobile water spray cannon vehicle (35), an atmospheric monitoring instrument (36), a display screen, and a control box (37); install sprinkler heads (38) every 10 meters on the wall (32); drill sprinkler holes (39) on the dust removal water supply pipeline (31) of the tower crane (33); S7: Backfilling: Backfill the fire passage in layers and compact it. Use a bulldozer (41) to backfill the basement ventilation observation pipe (28) and other areas. Backfill the surrounding 1000mm area manually. S8: Trigger the alarm bell / light (5) and dust suppression equipment through the data of the atmospheric monitoring instrument (36), and automatically stop after reaching the standard, with an allowable error of ±3s; repeat the above steps until the monitoring data reaches the standard; S9: Debug the automatic self-priming pump (21) and the construction and production drainage pump (10). After the debugging is stable, the recycling of rainwater, construction and production and domestic wastewater can be realized.

2. The green construction method for rainwater collection and recycling of construction production and domestic wastewater according to claim 1 is characterized in that: In the drainage, sedimentation, and filtration composite material in step S1, the geotextile (4) is sealed and laminated with the drainage ditch (2) and the top edge of the sedimentation tank device (3) by hot melt adhesive.

3. The green construction method for rainwater collection and recycling of construction production and domestic wastewater according to claim 1 is characterized in that: In step S2, the selection criteria for the installation equipment include: when the unit weight of the basement roof unorganized active drainage rainwater collection system (1) is greater than or equal to 5 tons, a truck crane (22) with a lifting capacity greater than or equal to 8 tons is selected, and the load capacity of the transport truck (9) is greater than or equal to 10 tons.

4. The green construction method for rainwater collection and recycling of construction production and domestic wastewater according to claim 1 is characterized in that: In step S3, the basement roof unorganized active drainage rainwater collection system (1) is transported to the installation location by a transport vehicle (9), and then hoisted to the installation location by a vehicle crane (22).

5. The green construction method for rainwater collection and recycling of construction production and domestic wastewater according to claim 1 is characterized in that: In step S4, a grid filter is provided at the water inlet (14), wherein the mesh diameter of the grid filter is 5 to 10 mm and the grid filter is detachably connected to the drainage ditch (2), and the spray head includes a greening maintenance spray head (17) and a concrete maintenance spray head (8).

6. The green construction method for rainwater collection and recycling of construction production and domestic wastewater according to claim 1 is characterized in that: In step S5, the basement (6) top plate and side wall related structures include the basement (6) top plate, side wall waterproofing membrane (24), steel wire fine stone concrete protective layer (25), siphon drainage trough (26), composite polymer protective drainage special-shaped sheet (27), geotextile (4), air permeable observation tube (28), siphon drainage pipe (29) and sedimentation observation well (30).

7. The green construction method for rainwater collection and recycling of construction production and domestic wastewater according to claim 1 is characterized in that: In step S6, the dust removal water supply pipe (31) adopts a Φ18 mm PVC pipe, and the spray holes (39) on the dust removal water supply pipe (31) have a diameter of 1 to 2 mm and are evenly distributed along the circumference of the pipe.

8. The green construction method for rainwater collection and recycling of construction production and domestic wastewater according to claim 1 is characterized by: In step S7, a roller (19) is used to compact the backfilled soil.

9. The green construction method for rainwater collection and recycling of construction production and domestic wastewater according to claim 1 is characterized by: In step S8, the monitoring parameters of the atmosphere monitor (36) include PM2.5 and PM10. When the monitoring values ​​exceed 0.075 mg / m³ and 0.15 mg / m³ respectively, the alarm bell / light (5) and the dust suppression equipment are automatically triggered.

10. The green construction method for rainwater collection and recycling of construction production and domestic wastewater according to claim 1 is characterized in that: In step S9, the outlet pressure of the automatic self-priming pump (21) is set to 0.2-0.3 MPa, and a check valve is provided between the pipelines of each water point to prevent water backflow.

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