Electromechanical pipeline anti-pollution pre-burying construction method suitable for greenway in water source protection area

Abstract

The invention relates to the technical field of constructional engineering or municipal engineering, and discloses an electromechanical pipeline anti-pollution pre-burying construction method suitable for a greenway in a water source protection area. The method sequentially comprises the steps of construction preparation and anti-pollution disclosure, anti-pollution grooving and waterproof sleeve pre-burying, pipeline laying and anti-leakage connection, anti-pollution groove backfilling, leakproofness testing and finished product plugging, and pollution control measures penetrating through the whole process. The method comprises the following steps: checking seepage prevention and drip leakage collection of the oil storeroom in a disclosure stage; a dust-proof process of spraying water and covering a dust-proof cover is adopted during grooving; during backfilling, the haunch angle part of the pipe bottom is compactly filled; during inspection, closed water inspection is adopted, and the interface is exposed for observation; and the construction wastewater is subjected to classified treatment of oil separation, septic and precipitation, and secondary pollution solid waste is independently stored and marked obviously. The contradiction between construction in a water source protection area and environmental protection is solved, construction pollution can be systematically controlled, and the pipeline engineering quality is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building engineering or municipal engineering, in particular to a mechanical and electrical pipeline pollution prevention pre-embedded construction method suitable for greenways in water source protection areas. BACKGROUND

[0002] At present, urban greenway construction is developing rapidly. Many greenway systems, especially those along rivers and lakes, often pass through water source protection areas. These areas have very high requirements for environmental protection. At the same time, the functions of greenways cannot be fully realized without the supporting laying of mechanical and electrical pipelines, such as power supply, communication, water supply and drainage, etc. Therefore, how to carry out underground pipeline pre-embedded construction in these environmentally sensitive areas while avoiding pollution to water bodies and soil has become a technical problem that needs to be solved urgently.

[0003] In view of the above-mentioned related content, the attention of the conventional mechanical and electrical pipeline pre-embedded construction is mainly focused on the engineering progress and structural quality. The construction unit usually excavates a trench according to the standard process. Then, they lay and connect the pipeline. Finally, the trench is backfilled and the site is restored. For the pollution problem during construction, the existing method is often to set up a temporary sewage sedimentation tank or to simply cover the exposed soil. These measures usually exist as additional items outside the main construction process.

[0004] However, the above-mentioned prior art has deficiencies. First, the existing pollution control is often passive and scattered, lacking systematic management throughout the construction cycle. Second, the construction process is relatively extensive: for example, the dust suppression effect at the trenching point is not good; waste water from different sources such as canteens and toilets is often mixed for treatment without effective classification; during backfilling, the dense filling of key parts such as the pipe bottom axillary angle is often ignored, which easily leads to pipe settlement and deformation. In addition, the engineering inspection link is also imperfect, such as the timing of pipeline tightness inspection is not reasonable, making it difficult to identify leakage points; the means for checking the smoothness of concealed pipelines is also too single, which cannot effectively find local blockage hazards.

[0005] Therefore, the present application provides a mechanical and electrical pipeline pollution prevention pre-embedded construction method suitable for greenways in water source protection areas to solve the deficiencies in the prior art. SUMMARY

[0006] In view of the deficiencies of the prior art, the present application provides a mechanical and electrical pipeline pollution prevention pre-embedded construction method suitable for greenways in water source protection areas, which solves the problem of how to systematically control various types of pollution generated during construction in environmentally sensitive areas such as water source protection areas when carrying out mechanical and electrical pipeline pre-embedded construction, and ensures the quality of pipeline engineering.

[0007] To achieve the above purpose, the present application is implemented by the following technical scheme: the present application provides a mechanical and electrical pipeline pollution prevention pre-embedded construction method suitable for greenways in water source protection areas, which comprises the following steps in sequence: S1, construction preparation and pollution prevention briefing is performed, and material verification before construction and pollution prevention requirements are determined; S2, pollution prevention trenching and waterproof sleeve pre-burying are performed to form a trench and a passage for laying a pipeline; S3, pipeline laying and anti-leakage connection are performed to form a complete pipeline system; S4, pollution prevention trench backfilling is performed to cover and fix the pipeline system; S5, airtightness testing and product plugging are performed, wherein the airtightness testing adopts a closed water testing method and is performed after the pipeline top backfilling reaches a height of one pipe diameter, and during the testing, all pipeline interface positions are kept exposed for observation; S6, pollution control measures throughout the whole construction process are performed, and the measures include classified treatment of construction wastewater, wherein kitchen wastewater is treated by an oil separation tank, toilet wastewater is treated by a septic tank, and production and living wastewater is treated by a three-stage sedimentation tank before being discharged into a municipal sewage pipe network.

[0008] By adopting the above technical scheme, the method deeply integrates rigorous construction procedures with specific environmental protection and quality inspection measures. First, by sequentially performing the procedures S1 to S6, the logicality and integrity of the construction are ensured. Second, the closed water testing method of exposed interface after backfilling adopted in step S5 solves the problem of unreasonable testing time, which not only stabilizes the pipeline by using the backfilling soil to prevent the pipeline from floating or moving under testing pressure, but also enables the leakage point to be intuitively and accurately located by keeping the interface exposed, thereby avoiding the difficulty of blind troubleshooting after full backfilling. Meanwhile, in step S6, the construction wastewater from different sources is subjected to targeted classified pretreatment, which ensures that the pollutants are effectively separated and degraded at the source, improves the wastewater treatment efficiency, and guarantees the compliance of the final discharge water quality. Therefore, the scheme not only systematically controls the construction pollution, but also improves the testing reliability and quality of the pipeline engineering.

[0009] Preferably, in step S1, the construction preparation and pollution prevention briefing step includes: verifying that the warehouse storing oil and chemicals has been subjected to anti-leakage treatment.

[0010] By adopting the above technical scheme, the source pollution prevention and control is intervened at the construction preparation stage. By physically treating the warehouse for anti-leakage, a solid barrier is set for oil and chemical storage, which can effectively prevent material infiltration due to accidental leakage and avoid direct pollution to the soil and underground water body around the warehouse.

[0011] Preferably, on the basis of verifying that the warehouse has been subjected to anti-leakage treatment, the construction preparation and pollution prevention briefing step further includes: verifying that a stainless steel container is placed below the oil outlet of the oil and chemicals to receive the dripping oil.

[0012] By adopting the technical scheme, the second guarantee of source prevention and control is formed. The measure aims at the leakage problem in the dynamic process of material taking, collects through the setting of a special container, avoids the small and continuous pollution in the operation process, and realizes the whole-process leakage control of the chemicals in cooperation with the static anti-leakage measure of the warehouse.

[0013] Preferably, in the step S2, the anti-pollution grooving and pre-burying of the waterproof sleeve include: spraying water on the operation area before grooving operation by using a grinding wheel grooving machine, and performing the grooving operation after covering the dustproof cover on the grinding wheel grooving machine.

[0014] By adopting the technical scheme, the double dust suppression means of wet operation and physical shielding are adopted. The water spraying before operation increases the humidity of the material, and can reduce the amount of dust generated from the source; the covering of the dustproof cover can effectively block and collect the dust splashed in the cutting process. The combination of the two reduces the dust dispersion of the grooving operation point, and improves the local construction environment.

[0015] Preferably, in the step S3, the pipeline laying and anti-leakage connection step includes: when the pipeline is a galvanized steel conduit, the grounding wire is crossed by using a special grounding wire clamp, and the fusion welding cross connection is strictly prohibited.

[0016] By adopting the technical scheme, the integrity of the pipe material is protected while ensuring electrical safety. Fusion welding cross connection will generate high temperature, which inevitably damages the galvanized anti-corrosion layer on the surface of the steel conduit. The physical connection by using a special grounding wire clamp can realize reliable electrical cross connection, avoid damage to the anti-corrosion layer caused by high temperature, and ensure the durability and long service life of the pipeline system in the humid underground environment.

[0017] Preferably, in the step S3, the pipeline laying and anti-leakage connection step further includes: at the pipeline crossing the floor or wall, the gap between the pre-buried sleeve and the pipeline is filled with fire-retardant compact material and waterproof grease.

[0018] By adopting the technical scheme, the double functional sealing of the gap at the pipeline crossing the structure is realized. The application of waterproof grease ensures the waterproof tightness of the node, preventing water from penetrating along the gap; the application of fire-retardant compact material improves the fireproof grade of the part, meeting the requirements of building safety specifications.

[0019] Preferably, in the step S4, the anti-pollution groove backfilling step includes: when the pipeline is located under the driveway or in the soft soil foundation, the axillary angle part at the bottom of the pipeline is first filled and compacted with medium and coarse sand.

[0020] By adopting the above technical solutions, the weak points in the pipeline structure's mechanics were strengthened. First, the haunch area was filled, providing a solid and uniform bottom support for the pipeline, effectively preventing stress concentration, deformation, or damage caused by upper loads or uneven foundation settlement, thus ensuring the structural stability of the pipeline system.

[0021] Preferably, after the axle corner of the bottom of the pipe is filled and compacted, the method further includes: backfilling medium and coarse sand or stone chips in layers up to the top of the pipe.

[0022] By adopting the above technical solution, and with effective support at the axle angle, the layered backfilling method ensures that the backfill material on the upper part and both sides of the pipeline also achieves high density. This creates a uniform and stable load-bearing environment for the entire pipeline system, supplementing and improving the filling effect at the axle angle of the pipe bottom.

[0023] Preferably, in step S5, the airtightness inspection and finished product sealing steps further include: when performing the lead wire threading operation on the concealed pipe, bringing in multiple copper wires at once as a final inspection of the pipe's unobstructedness.

[0024] By adopting the above technical solution, the dual functions of wire threading and pipeline re-inspection are achieved. The process of multiple wires passing through at once simulates the working conditions of subsequent cable installation. This can effectively check whether there are construction residues, minor blockages caused by local deformation or collapse throughout the pipeline. It is a simple and efficient final functional verification method, avoiding the risk of subsequent wire threading obstruction.

[0025] Preferably, the pollution control measures throughout the entire construction process described in step S6 also include: classifying and managing construction solid waste, including storing waste that may cause secondary pollution separately, setting up safety precautions and setting up conspicuous signs.

[0026] By adopting the above technical solutions, specific management measures for solid waste were established. Through the isolation, protection, and labeling management of secondary polluting waste, the spread of hazardous substances and secondary pollution to the environment were effectively prevented, and a clear basis was provided for subsequent compliant transfer and professional disposal, thus achieving closed-loop management of construction solid waste.

[0027] This invention provides a method for the pollution-proof pre-buried construction of electromechanical pipelines in greenways within water source protection areas. It offers the following advantages: 1.The method of the present application not only effectively controls the dust, wastewater and solid waste during construction through measures such as water spraying cover before slotting, wastewater classification treatment and solid waste isolation management, but also actively prevents potential pollution sources through anti-seepage treatment and drip collection of oil chemical warehouse. This multi-dimensional and whole-process control method can effectively reduce the impact of construction activities on the ecological environment of the water source protection area.

[0028] 2.In the trench backfilling process of the present application, the damage of the pipeline caused by uneven settlement is effectively prevented by filling the specific material at the pipe armpit part; in the airtightness inspection process, the leakage point can be accurately found and repaired by keeping the interface exposed for observation after backfilling; before threading, the pipeline patency is finally verified by bringing multiple copper wires at one time, avoiding the risk of pipe blockage and rework in the later stage.

[0029] 3.From the pollution prevention technology briefing before construction to the various pollution prevention processes during construction, and to the airtightness inspection after construction, each link has clear technical requirements and control nodes. This standardized process not only facilitates the construction personnel to execute, but also provides clear supervision basis for the supervision and management parties, so as to efficiently ensure that the construction activities can meet the dual goals of engineering quality and environmental protection in the water source protection area with high standard requirements. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is the whole method flowchart of the present application; Figure 2 is the flowchart of construction preparation and pollution prevention briefing of the present application; Figure 3 is the flowchart of pollution prevention slotting and waterproof sleeve pre-burying of the present application; Figure 4 is the flowchart of pipeline laying and anti-leakage connection of the present application; Figure 5 is the flowchart of pollution prevention trench backfilling of the present application; Figure 6 is the flowchart of airtightness inspection and finished product plugging of the present application; Figure 7 is the flowchart of pollution control measures throughout the whole process of the present application. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings of the present application specification. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0032] See appendix Figure 1 This invention provides a method for the pre-buried construction of electromechanical pipelines for pollution prevention in greenways of water source protection areas.

[0033] See appendix Figure 2 In one embodiment, the construction preparation and pollution prevention briefing phase of the method includes a pollution prevention-specific technical briefing, the content of which includes: First, a water source and river protection guarantee system was established, and all personnel received pre-job training on water protection.

[0034] The briefing clearly required the construction of intercepting ditches to prevent sewage from flowing into water source protection areas or surrounding rivers during construction or heavy rain.

[0035] The briefing strictly stipulates that wastewater generated from production and daily life must undergo three-stage sedimentation tanks before being discharged into the municipal sewage network, and discharge into water source protection areas and rivers is strictly prohibited. At the same time, a special emergency plan for water pollution must be established.

[0036] Regarding water pollution control measures, the briefing requires ensuring that stormwater and sewage pipe networks are used separately, and strictly prohibiting the discharge of non-stormwater water bodies into the municipal stormwater pipe network. All wastewater leaving the municipal network must undergo three-stage sedimentation before being discharged.

[0037] Sedimentation tanks are installed at the on-site mixer counter and transport vehicle washing area. Wastewater discharged must be placed in the sedimentation tanks for secondary sedimentation before being discharged into the municipal sewage system or recycled for dust suppression. Untreated muddy water is strictly prohibited from being directly discharged into urban drainage facilities.

[0038] Clean water from basic precipitation, after proper utilization, is discharged into the municipal sewage pipeline through guide pipes. Drainage ditches are uniformly planned for on-site traffic roads and material storage areas to control sewage flow, and sedimentation tanks are installed.

[0039] A grease trap is installed at the wastewater outlet of the canteen, and the outlet of the grease trap is connected to the sewage network. A septic tank is installed in the toilet, and the outlet of the septic tank is connected to the municipal sewage network.

[0040] Wastewater generated during pressure testing, flushing, and water testing at the construction site must be discharged into designated locations or municipal sewage networks as required.

[0041] Regarding waste and chemical management, the briefing requires that waste generated during construction and production be centrally processed and must not be dumped or burned indiscriminately. Waste must be transported to designated locations approved by the local environmental protection department for disposal to avoid polluting water sources.

[0042] Several portable trash cans will be set up in the temporary facilities and office areas, and designated personnel will be assigned to manage and clean them. Sanitation responsibility areas will be established, temporary garbage dumps will be set up, and garbage and scraps will be cleaned up in a timely manner, ensuring daily collection and disposal, centralized storage, and regular removal.

[0043] Strengthen the management of on-site storage of oil and chemicals, and implement leak-proof measures for warehouses storing oil and chemicals. During storage and use, place stainless steel containers below the oil outlet to catch dripping oil and prevent oil from running, overflowing, dripping, or leaking.

[0044] Construction equipment and machinery should be managed by designated personnel, and measures should be taken to prevent the oil and liquids used from leaking into the ground.

[0045] Chemicals such as paints, coatings, and thinners should be used as needed to reduce storage volume, and waste paints, coatings, thinners, and their storage devices should be recycled and disposed of.

[0046] A dedicated temporary waste storage area shall be established at the construction site, and waste shall be stored separately according to its type. Waste that may cause secondary pollution must be stored separately with safety precautions and clear signage. Waste transportation shall ensure that it is not spilled or mixed, and shall be delivered to government-approved units or locations for disposal.

[0047] Regarding the prevention of dust and air pollution, the instructions require that the construction site be kept clean. When cleaning the site, dry sweeping should be avoided. Water must be sprinkled first, and dust suppression measures must be taken before sweeping.

[0048] Before cleaning the construction site and removing garbage, water should be sprinkled appropriately to avoid dust.

[0049] When steel or other materials require rust removal, dustproof enclosures must be installed to prevent dust from escaping. If on-site painting is involved, appropriate protective measures must be taken to prevent paint mist from spreading.

[0050] When using a grinding wheel grooving machine, spray it with water first, then cover it with a dust cover to prevent dust from flying. All chemical substances used in construction that easily pollute the atmosphere, such as paint, anti-corrosion paint, and fire-retardant coatings, should be collected and disposed of properly.

[0051] Regarding noise control, the briefing stipulates that all types of construction machinery exceeding the standards are strictly prohibited from use between 10 PM and 6 AM the following day.

[0052] When the indoor noise sources of surrounding residents are severely affected by low-frequency noise, the difference between the A and C sound levels measured in the center of the room should not exceed 10 decibels.

[0053] When it exceeds 10 decibels, The value is calculated using the following formula: ; in, It is a fast A-level sound level. The peak C-weighted sound level is for the fast setting.

[0054] Calculated The value is used as the sound level value at the indoor measuring point.

[0055] When the residential area is affected by impulse noise, the fast gear A sound level is measured according to the specification requirements , and then the fast gear peak C sound level is measured . If the difference between the two is too large, strict control is required.

[0056] In terms of preventing light pollution, the disclosure content requires that the installation position of the outdoor construction lighting lamp is reasonably placed, and lighting equipment should not be placed on the top of the construction fence adjacent to the municipal road. At the same time, a new type of reflector is installed for the light source, which does not leak light above, and the condensing effect of the reflector makes the light condense towards the ground.

[0057] In the embodiment of the present application, the anti-pollution pre-buried construction method of mechanical and electrical pipelines suitable for greenways in water source protection areas comprises establishing a water pollution emergency plan.

[0058] The establishment of the plan includes the establishment of an engineering accident emergency command team led by a project manager. A person is responsible for the daily work of the team, and a work system is formulated to clearly define the responsibilities of each member.

[0059] Thus, an emergency disposal guarantee system with clear division of labor, in-place responsibility, constant vigilance and coordinated operation is established.

[0060] The water pollution special emergency plan is institutionalized and runs through the whole construction process.

[0061] The plan content includes pre-establishing and preparing emergency disposal resources required for accidents in the construction area, and the specific resources include rescue teams, equipment, materials and technical consultation.

[0062] The plan is developed based on hazard analysis, which identifies one of the main hazards during construction as damage to water supply, rainwater and sewage pipelines, which can cause foundation pit flooding accidents.

[0063] The purpose of the plan is to ensure that in the event of a water pollution emergency, it can be handled in a timely manner according to the plan to reduce the adverse effects of water pollution.

[0064] In the embodiment of the present application, the construction preparation and pollution prevention briefing stage includes checking the construction materials.

[0065] When checking the materials for the casing pipe, the steel pipe and the attached products used are inspected before use. The checking content includes that the pipe material should not be bent, rusted, have flying burrs, heavy skin and unevenness. At the same time, the wall thickness and specifications of the pipe material are checked to ensure that they must meet the relevant standards and design specifications issued by the state, and have product factory qualification certificates and test reports.

[0066] ​​In the verification of electrical conduit materials, the material of the galvanized electrical conduit and PVC electrical conduit is verified to ensure that it meets the requirements and must have a product certificate.

[0067] The electrical conduit is subjected to an appearance inspection to verify whether the inner and outer walls of the pipe material are smooth, without protrusions, depressions, damage, and other defects.

[0068] The inside and outside diameters of the electrical conduit are measured using a caliper to verify whether they meet the national standards and whether the pipe wall thickness is uniform.

[0069] The accessories such as switch socket boxes, pipe joints, and box joints are verified to ensure that they have the required factory certificates, production permits, and certification copies.

[0070] In the verification of cable materials, the type and specification of the wire used for wiring are verified to ensure that they meet the design requirements. For insulated wires laid in pipes, the rated voltage should not be less than 500V.

[0071] Before laying the cable, the insulation resistance is measured using a 500V megohmmeter, and the resistance should not be less than 10MΩ.

[0072] In the verification of lighting equipment, the lamps and light sources are verified to ensure that they meet the design requirements, and all lamps are verified to have product certificates.

[0073] In the verification of pollution prevention-related materials, the use of paints, anticorrosive paints, fire retardant coatings, and thin materials that can easily pollute the atmosphere is managed.

[0074] The above chemicals are used immediately after being used to reduce the amount of storage on site.

[0075] The storage room for oil and chemicals is verified to ensure that the room has been treated for leakage prevention.

[0076] In the storage and use of oil and chemicals, it is verified whether a stainless steel container is placed below the oil outlet to receive the dripping oil and prevent oil from running, spouting, dripping, and leaking to pollute the water body.

[0077] Waste paint, coating, and thin material and their storage devices are verified to ensure that they are collected and recycled.

[0078] See the attached Figure 3 In the embodiment of the present application, the anti-pollution grooving and waterproof sleeve pre-burying construction stage includes an anti-dust and noise reduction grooving process.

[0079] When performing this process, first, the construction time is controlled. When using construction machinery such as a grinding wheel grooving machine that produces noise, it is strictly avoided to use during the time period from 22:00 to 06:00 the next day.

[0080] Before the slotting operation is performed, dustproof measures are taken. Specifically, when the abrasive wheel slotter is used, the operation area is first sprayed with water.

[0081] Subsequently, a dustproof cover is placed on the abrasive wheel slotter, and the slotting operation is started to prevent dust from flying.

[0082] During the slotting operation, noise control monitoring is simultaneously performed. When the surrounding residents' indoor noise source low frequency is affected, the A sound level and the C sound level are measured in the center of the room, and it is ensured that the difference between the A and C sound levels does not exceed 10 decibels.

[0083] If the difference between the measured A and C sound levels exceeds 10 decibels, the indoor measurement point sound level value is calculated according to the following formula: ; Among them, is the fast A sound level, is the fast peak C sound level. The calculated value is taken as the indoor measurement point sound level value.

[0084] When the residents' site is affected by impulse noise, the fast peak C sound level is measured on the basis of the fast A sound level measured according to the specification. If and are too different, strict control is performed.

[0085] After the slotting operation is completed, the construction site is cleaned and the garbage is transported. Before the operation area is watered, dust is prevented. When the site is cleaned, water must be sprayed first, dust is prevented, and then it is cleaned.

[0086] In the embodiment of the present application, the anti-pollution slotting and waterproof sleeve pre-burying construction stage includes the pre-burying and fixing of the waterproof sleeve. The process flow includes installation preparation, prefabrication processing, corrosion prevention treatment, elevation size measurement, and sleeve fixing.

[0087] In the installation preparation stage, the construction personnel are familiar with the water supply and drainage professional drawings and other related professional drawings. The steel pipes and accessories used for processing the sleeve are checked. The pipes must not be bent, rusted, have no flying burrs, heavy skin, and unevenness. The wall thickness and specifications of the pipes meet the standards, and have product factory qualification certificates and test reports. The main tools such as electric welder, abrasive wheel saw, gas welding, and polishing machine are prepared.

[0088] In the prefabrication processing and corrosion prevention treatment stage, the outer wall of the sleeve is cleaned and coated with release agent.

[0089] In the elevation dimension measurement stage, a person is specially assigned to measure the position, elevation and size of the pipeline and equipment according to the design construction drawing, and mark the hole position on the concrete form, beam and wall.

[0090] According to the design requirements, when crossing the basement outer wall, pool wall and roof, A-type rigid waterproof sleeve is arranged. A-type flexible waterproof sleeve is used at the pipeline connected with the fire pump.

[0091] When the indoor pipeline crosses the floor, concrete wall and beam, sleeve is arranged. When the water supply and drainage pipeline crosses the floor, steel sleeve with two specifications larger than the pipe diameter is used for reservation.

[0092] In the sleeve fixing stage, before binding the steel bar, the embedded sleeve is fixed according to the mark. After the position is found, the sleeve crossing the floor is fixed on the formwork by using binding wire and steel nails to prevent displacement.

[0093] The connection between the sleeve and the steel bar must be firm and cannot be loose. At the same time, the sleeve is leveled and straightened to avoid left and right inclination.

[0094] After the sleeve is fixed, the center elevation of the sleeve must be re-measured to ensure accuracy.

[0095] During the concrete pouring process, a person should be assigned to cooperate with the measurement and supervision of the sleeve and the formwork to prevent displacement during pouring.

[0096] The embedded sleeve has specific requirements on elevation: the upper end of the sleeve crossing the floor should be 20mm higher than the ground; the top of the sleeve installed in the kitchen, bathroom and pipe well should be 50mm higher than the decorative floor, and the bottom of the sleeve should be flush with the floor bottom.

[0097] After the pipeline installation is completed, the gap between the sleeve and the pipeline is filled with fire-retardant dense material and waterproof grease, and the end surface is smooth.

[0098] See the attached Figure 4 In the pipeline laying and fixing stage of the embodiment of the application, the pipeline is first positioned.

[0099] According to the construction drawing, the accurate position of the box, case and outlet is measured. For the laying of the electrical exposed pipe, after the position of the box and case is determined, the vertical and horizontal straight line of the pipeline is pulled out, and the specific position of the support and hanger is determined according to the required spacing of the fixed point. For the laying of the electrical plastic conduit, according to the one-meter line popped out by the civil engineering professional, the position of the grooved pipeline and the box and case is measured by using the small line and level and steel tape, and the position of the pipeline and the box and case is popped out by using the ink fountain line.

[0100] In the electrical pipe laying, the conduit should be arranged neatly, the fixed point spacing is uniform, and the installation is firm. The pipe clamp is provided within the distance of 150mm to 500mm from the edge of the terminal, the elbow midpoint or the cabinet, the table, the box and the like.

[0101] For the socketed steel conduit, if there is no clear provision in the design, the support and the hanger are selected from the round steel with a diameter not less than φ6mm or the flat steel with a diameter of -25*4. The maximum distance between the pipe clamps of the straight section is 1.0m to 1.5m for 16 to 20 conduits and 1.5m to 2.0m for 25 to 32 conduits. The distance between the fixed point and the terminal, the elbow midpoint or the edge of the box is 150mm to 300mm.

[0102] The fixed method of the support and the hanger is selected according to the structural characteristics, and the pipe expansion method (punching in the concrete formwork and fixed by the expansion bolt) or the hoop method (fixed by the hoop at the steel structure beam column) is adopted.

[0103] In the electrical concealed laying, in order to reduce the bending, the pipe is laid along the nearest path. When the pipe is buried in the wall or the concrete, the net distance between the pipe and the surface of the wall or the concrete is not less than 15mm.

[0104] The fixed point of the concealed laying pipe requires firmness and reasonable spacing. When the pipe is laid in the reinforced concrete and the slab, the pipe is fixed by binding the inside of the steel bar, and the spacing between the fixed points is not greater than 1m. When the pipe is laid in the brick wall, the vertical laying width is not greater than 50mm, the spacing between the fixed points is not greater than 1m, and the fixed point is additionally provided at the position 200mm away from the outside of the connecting point. The pipe laid on the prefabricated round hole plate requires smoothness, close to the ground, and the spacing between the fixed points is not greater than 1m.

[0105] For the electrical plastic conduit concealed laying, the pipe head reserved in the concrete plate is adjusted to be perpendicular to the plate surface by using the pipe bender, the required pipe length is determined according to the position of the box, and the pipe is cut by using the saw blade or the hacksaw. Then, the pipe is connected with the embedded pipe head and the box by using the direct and lock nut, and is temporarily fixed in the pipe groove by using the iron nail.

[0106] The bending radius of the pipe laying is controlled. The bending radius of the electrical pipe or the pipe laid in the brick wall is not less than 6 times the outer diameter of the pipe, and the bending radius of the pipe buried in the concrete is not less than 10 times the outer diameter of the pipe. The minimum bending radius of the plastic pipe should be ≥6D, and the bending degree is ≤0.1D, D is the outer diameter of the pipe.

[0107] When the socketed steel conduit is laid horizontally or vertically, the horizontal or vertical installation deviation is 1.5‰, and the full length deviation is not greater than 1 / 2 of the inner diameter.

[0108] When the pipeline enters the box or the case, one pipe should be inserted into one hole, and the diameter of the pipe should be consistent with the knock-out hole of the box or the case. The plastic pipe should be straight when entering the box or the case, and the pipe opening should be flush with the inner opening of the box or the case. The length of the pipe exposed in the box or the case should be less than 5mm, and a long hole is not allowed.

[0109] For the installation of the pipeline in the trench, manual installation is adopted. When the trench is not deep, the pipe is lifted into the trench by manpower; when the trench is deeper than 3m or the diameter of the pipe is larger than the nominal diameter DN400mm, the pipe is slid into the trench by using non-metallic ropes, and then placed smoothly on the sand foundation pipe position. It is strictly prohibited to use metal ropes to hook the two ends of the pipe or to throw the pipe into the trench from the side of the trench.

[0110] When the socket pipe is installed, the insertion direction of the socket is consistent with the direction of the water flow, and the installation is carried out from the low point to the high point. When the length of the pipe is adjusted, a hand saw can be used for cutting, and the cross section should be perpendicular and smooth without damage.

[0111] The pipeline should be laid on the original land foundation or on the compacted cushion layer after trenching. When the pipeline is under the driving lane, the thickness of the soil covering the top of the pipeline should not be less than 0.7m. The pipeline should be laid in a straight line, and when a flexible joint is used to lay a curved line, the allowable angle of the longitudinal axes of the two adjacent pipes is provided by the pipe manufacturer, and the angle of the special-shaped wall pipe is generally not greater than 2 degrees.

[0112] In the embodiment of the present application, the pipeline laying and anti-leakage connection construction stage includes a pipeline anti-leakage connection process.

[0113] For hard plastic pipes, the connection is made by inserting. The insertion depth is 1.1 to 1.8 times the inner diameter of the pipe. A glue agent is applied on the insertion surface to ensure firm sealing. For electrical plastic pipes, the pipeline connection requires tightness, smooth pipe opening, and the pipe interface is located in the center of the sleeve, and the interface is firmly bonded by using adhesive.

[0114] For the sleeve connection and fastening type steel pipe, when the pipeline is connected, the fastening screw is operated by using a special tool. Before connection, it is ensured that the pipe openings on both sides are smooth and flat, without burrs and deformation. When the pipe is inserted into the connection sleeve, it must be in close contact.

[0115] For flexible metal pipes or other flexible pipes, when they are connected with rigid pipes or electrical equipment and appliances, special joints are used. The connection of the composite flexible metal pipe or other flexible pipe must be sealed well, and the liquid-proof cover layer must be intact.

[0116] When the steel pipe passes through the deformation joint, a flexible connection method is adopted.

[0117] For drainage pipes and the like, the joint uses an elastic sealing ring flexible joint. Before connection, it is checked whether the rubber ring is complete and whether the rubber ring placement position and the depth of the socket inserted into the socket are appropriate.

[0118] When the interface is operated, the inner wall of the socket and the outer wall of the spigot are cleaned with cotton yarn to ensure that there are no dirt and sundries. Then, a lubricant is applied to the inner working surface of the socket, and the center of the spigot end is immediately aligned with the center axis of the socket.

[0119] When the spigot is inserted into the socket, small-diameter pipes can be installed manually by setting a wooden baffle at the end of the pipe and using a crowbar to slowly insert the pipe to be installed along the aligned axis into the socket. For pipes with a nominal diameter greater than DN400mm, the pipe is tied with a cable, and a hand-operated hoist or other lifting tool is used for installation.

[0120] When the pipe passes through the floor, wall, or beam, the gap between the pre-buried sleeve and the pipe is filled with fire-retardant and waterproof grease, and the end surface is smooth.

[0121] When the pipe is connected to the inspection well, an intermediate layer can be used. That is, an intermediate layer is made on the outer surface of the pipe or pipe fitting at the joint with the well wall using polyvinyl chloride adhesive and coarse sand, and then the cement mortar is laid into the wall of the inspection well.

[0122] Alternatively, when the pipe is connected to the inspection well using flexible connection, a precast concrete sleeve and a rubber sealing ring joint are used. The concrete sleeve is laid in the well wall with the center aligned with the pipe axis. During installation, the rubber ring is first placed in the specified position of the pipe spigot, and then the pipe section is inserted into the sleeve.

[0123] After the pipe installation is completed and passes the inspection, the pipe tightness test should be conducted. The test uses the closed water test method.

[0124] In the embodiment of the present application, the pipeline laying and anti-leakage connection construction stage includes an anti-electrochemical corrosion grounding measure.

[0125] The purpose of this measure is to ensure that the steel pipe and the steel pipe, and the steel pipe and the box (case) are reliably connected to form a conductive whole, to prevent accidents caused by the pipe being electrified when the wire insulation is damaged.

[0126] To prevent electrochemical corrosion, specific grounding technology is adopted for pipeline connections of different materials and types.

[0127] For galvanized steel pipes, flexible pipes, and metal wire ducts, the grounding connection must not use a fusion welding jumper wire to prevent the high temperature of welding from damaging the galvanized protective layer.

[0128] For the above-mentioned galvanized pipelines, the jumper wire should be crossed using a special grounding wire clamp. The connecting wire between the two clamps used for crossing is made of copper core soft wire, and its cross-sectional area should not be less than 4mm².

[0129] For threaded (non-galvanized) steel pipes, the two ends of the connection shall be welded with a cross-over ground wire, or a special grounding clamp is used for cross-over.

[0130] In addition, the grounding measures explicitly stipulate that flexible metal conduit and metal flexible conduit cannot be used as continuous conductors of grounding (PE).

[0131] Referring to the drawings Figure 5 In the embodiments of the present application, the anti-pollution trench backfill construction stage first includes strict pre-backfill requirements and material control measures.

[0132] In terms of pre-backfill requirements, the process node for starting backfill and the trench state requirements are clearly defined. First, trench backfill must be carried out immediately after pipeline installation is completed and passes inspection. A key prerequisite is the airtightness test of the pipeline (such as the closed water test), which is usually required to be carried out after the pipe bottom and foundation corner parts have been backfilled with sand to compactness; if necessary, it is also allowed to carry out the test under the condition that the top of the tested section is backfilled to a height of one pipe diameter above the top of the pipe (but the exposed part of the pipeline interface must be ensured to observe).

[0133] At the same time, there are strict requirements for the environmental state of the trench. There must be no accumulated water in the trench during backfilling, and water backfilling is strictly prohibited. If the trench (especially the base) is water-bubbled (e.g. water-bubbled) before backfilling, the softened soil layer affected by the water bubble must be thoroughly removed and replaced with qualified sand or medium-coarse sand. For pipelines that have been installed but not yet backfilled, if they are also water-bubbled, the center line and bottom elevation of the pipe must be re-measured, and a strict visual inspection must be carried out. Once displacement, floating or pulling out is found, rework must be carried out until it is qualified before backfilling. For construction in the rainy season, to prevent pipe material from floating, pre-backfilling measures are allowed, i.e. backfilling to a height of more than one pipe diameter above the top of the pipe.

[0134] In terms of material control, the aim is to ensure backfill quality and prevent pollution. First, the use of unqualified materials is strictly prohibited, and silt, organic matter and frozen soil are strictly prohibited from being backfilled, and the backfill soil must not contain stones, bricks and other hard objects. Second, the backfill material of the key part of the pipe area is limited. From the bottom of the pipe foundation to the area within 0.4m above the top of the pipe, the specified material must be used, including gravel, sand with particle size less than 40mm, medium sand, coarse sand, or good quality soil excavated. Third, the material control is strengthened for special sections (such as sections where the pipeline is located under the driveway, soft soil foundation, low-lying, marsh or high groundwater level). At this time, the trench backfill must first use medium and coarse sand to fill and compact the axillary angle part of the pipe bottom, and then continue to use medium and coarse sand or stone chips to backfill in layers to 0.4m above the top of the pipe, and good quality soil can be used above this height. Fourth, source management of materials is implemented. During the trench excavation stage (such as manual trenching), the mixed soil on the upper part of the trench and the good quality soil that can be used for trench backfill on the lower part of the trench are consciously classified and stacked for selection during backfill. Fifth, waste materials generated during construction, such as waste steel, waste pipes, waste liquids and waste residues, must be treated and labeled, isolated, and strictly prohibited from being thrown or mixed into the backfill soil to prevent secondary pollution to the trench.

[0135] In the embodiments of the present application, the anti-settling backfill process is strictly controlled during the anti-pollution trench backfill construction stage.

[0136] To ensure that the pipeline and structures do not displace during backfilling and to ensure the compactness of the backfill to prevent later settlement, the core of process control is symmetry, layering, zoning and method.

[0137] First, during backfilling operations, backfilling must be performed simultaneously and symmetrically from both sides of the pipeline, inspection well and other structures to ensure uniform stress. If necessary, limiting measures should also be used to assist in fixing to prevent displacement.

[0138] Second, the process is divided into different control areas according to the backfill height: the key lower area, i.e. from the bottom of the pipe foundation to the area within 0.7m above the top of the pipe, must be backfilled manually. In this area, mechanical bulldozing (such as very fine bulldozing) is strictly prohibited to prevent mechanical force from impacting or displacing the pipeline.

[0139] The upper area, i.e. the part above 0.7m of the top of the pipe, is allowed to be backfilled mechanically. However, mechanical operation must also follow the symmetry principle, i.e. backfilling from both sides of the pipeline axis simultaneously, followed by tamping, which can be done using mechanical rolling at this time.

[0140] Thirdly, specific technical parameters are formulated for layering and compaction. The backfilling of the trench must be carried out in layers (layer-by-layer backfilling) and compacted layer by layer. In order to ensure the compaction effect, the height of each layer of backfilling is strictly controlled and should not be greater than 0.2 m.

[0141] Fourthly, protection measures for key positions are specified. In the pipe bottom armpit position of the pipeline (especially the pipeline located under the driveway, soft soil foundation or high groundwater level section), it must be filled and compacted with medium and coarse sand first. At the same time, in order to protect the pipe structure, within the range of 0.4 m above the top of the pipe, ramming tools are strictly prohibited.

[0142] In addition, for the pipe trench (slot, hole) in which the electrical plastic conduit is laid in the wall or concrete slab, the restoration (filling) process also involves anti-settlement control. When filling M10 mortar, if a larger hole is encountered, gravel or other particles should be added to the mortar, and it must be vibrated while filling until it is filled, ensuring that it is filled and compacted without gaps, and finally it needs to be watered and maintained.

[0143] Referring to the drawings Figure 6 In the embodiment of the present application, the leakproofness inspection and the finished product plugging stage include the leakproofness inspection of the pipeline system.

[0144] The inspection is carried out after the pipeline installation is completed and passes the preliminary inspection, and the core is to use the closed water inspection method to verify the sealing performance of the entire pipeline system, especially the interface connection.

[0145] The implementation time point of the closed water inspection is closely related to the backfilling progress of the trench and has a clear process prerequisite. According to the regulations, the leakproofness inspection should be carried out after the pipe bottom and the foundation armpit position have been backfilled with sand and compacted, which can ensure that the pipeline is effectively supported when bearing water pressure.

[0146] In necessary cases, the inspection is also allowed to be carried out under the condition of higher backfilling progress. At this time, the pipe section to be inspected can be backfilled to the height of one pipe diameter above the top of the pipe according to the requirements, and then the closed water inspection is carried out. However, under this condition, a key technical control point is that all the interface positions of the pipeline must be kept exposed and not covered. The purpose of this method is to be able to directly and clearly observe whether each interface leaks during the inspection, so as to accurately locate the potential sealing defects.

[0147] In the embodiment of the present application, the leakproofness inspection and the finished product plugging stage include the anti-blocking protection measures for the finished product pipeline and box.

[0148] The protection measure is a key process throughout the construction process, and the core requirement is that after the pipeline laying or box installation process is completed, the finished product must be protected immediately, and clear anti-smashing, anti-misplacement and anti-blocking measures should be provided.

[0149] For anti-blocking, the embodiment adopts the technical solution of combining active plugging with foresight dredging guarantee.

[0150] First, in terms of active plugging, the parts prone to foreign matter entry are timely and effectively physically closed. Specifically, after the electrical piping process is completed, the ends (pipe openings) of all pipelines must be tightly plugged using dedicated pipe plugs. This is done to prevent blockage caused by subsequent work types from the source, especially to effectively prevent foreign matter from falling into upward-facing pipe openings, and to prevent permanent blockage caused by mortar flowing into the pipe during concrete pouring or wall plastering. At the same time, for installed fixed distribution boxes, junction boxes, etc., they should also be timely plugged with foam or covers to protect the internal space from being contaminated and blocked.

[0151] Second, in terms of foresight dredging guarantee, the embodiment also sets up a process to exclude hidden dangers. When performing the threading operation on concealed pipelines, not only one wire is threaded, but three copper wires with a cross-sectional area not less than the design specification are required to be brought in at one time. This approach not only completes the threading task, but more importantly, it simultaneously serves as a final test and guarantee of pipeline smoothness, effectively ensuring and excluding hidden dangers such as blockage or partial pipe choking (deformation of the pipeline leading to reduced internal diameter) that may exist inside the pipeline and have not been discovered.

[0152] Referring to the accompanying Figure 7 In the embodiment of the present application, the pollution control measures throughout the construction process include a systematic scheme for protecting construction water bodies, the core of which is to classify and treat various types of wastewater generated on site and discharge them in accordance with standards.

[0153] This scheme first establishes a comprehensive wastewater collection and diversion system. To prevent cross-contamination, the site strictly ensures that rainwater pipe networks and sewage pipe networks are used separately, and non-rainwater other water bodies are strictly prohibited from being discharged into municipal rainwater pipe networks. At the same time, through unified planning, drainage ditches are laid out in areas such as site traffic roads and material storage sites, and intercepting ditches are built to effectively intercept and guide the surface runoff in the construction area, preventing sewage generated by construction or heavy rain from directly flowing into water source protection areas or surrounding rivers.

[0154] In terms of wastewater treatment technology, the embodiment adopts a targeted and multi-level treatment method for wastewater from different sources: 1. For general production wastewater and domestic wastewater: wastewater such as wastewater generated by on-site mixer front desk and cleaning of transport vehicles must be first discharged into the sedimentation tank. The treatment process includes at least two sedimentation steps to ensure sufficient removal of suspended solids. A more stringent control standard is that all wastewater planned to be discharged on site must be treated by a three-stage sedimentation tank. Untreated slurry water is strictly prohibited from being directly discharged into the urban drainage facilities.

[0155] 2. For special domestic wastewater: for specific domestic wastewater with special pollution components, a pretreatment step is provided before discharging into the main sewage pipe network. Specifically, an oil separation tank must be provided at the outlet of the canteen to remove oil; and a septic tank must be provided for toilets to preliminarily decompose and treat fecal wastewater.

[0156] 3. For wastewater generated during specific construction processes: wastewater generated during pipe pressure test, flushing, or water test at the construction site is subject to specific regulations and must be discharged into the designated location or directly connected to the municipal sewage pipe network according to the requirements of the general contractor and the supervisor. Effective control measures are also required to reduce the impact on the surrounding environment in case of leakage during the pressure test.

[0157] 4. For clean water: clean water generated by on-site foundation dewatering can be directly discharged into the municipal sewage pipe line through a guide pipe after being reasonably utilized (such as for watering to reduce dust).

[0158] After the above corresponding treatment process, wastewater has two final destinations: one is recycling, for example, water treated by secondary sedimentation can be recycled for watering and dust reduction on site; the other is standard discharge, i.e. water treated by three-stage sedimentation process can be discharged into the municipal sewage pipe network.

[0159] In addition, to deal with emergencies, the embodiment also requires the establishment of a special emergency plan for water pollution, and the storage of oil and chemical warehouses is subjected to anti-leakage treatment, and containers are placed under the oil outlet to collect the dripping, so as to prevent the risk of pollution to water caused by running, overflowing, dripping, and leaking from management and facilities.

[0160] In the embodiment of the present application, the pollution control measures throughout the construction process include anti-leakage control schemes for oil and chemicals, aiming to prevent pollution to soil and water throughout the whole life cycle from storage, use to waste treatment.

[0161] The scheme first controls from the source of storage management. First, the warehouse storing oil and chemicals is subjected to mandatory anti-leakage treatment to build the first physical defense line. Second, in terms of management strategy, chemicals such as paint, coating, and thinner are taken according to the principle of using them as they are needed to minimize the amount of storage on site.

[0162] In the use stage, the scheme formulates fine operation procedures to prevent running, overflowing, dripping and leaking. On the one hand, for the oil, liquid and the like used by construction equipment and tools, it is clearly required that measures must be taken to prevent them from seeping into the earth. On the other hand, for the use link of oil and chemicals, a specific technical operation requirement is proposed: no matter in the storage warehouse or in the use site, a stainless steel container must be placed below the oil outlet or the use outlet for accurately receiving the oil or liquid that may drip. This measure can effectively prevent point pollution caused by dripping and leaking and avoid the final pollution of water bodies.

[0163] In the waste treatment stage, the scheme establishes a complete closed-loop management process. First, all waste oil and chemicals generated during construction, such as leftover or waste paint, anticorrosive paint, fire retardant coating, thinner and the like, as well as their storage devices (such as paint buckets), must be uniformly collected and specially treated. Second, these collected waste must be isolated from ordinary construction waste and labeled. Finally, these classified and isolated hazardous waste must be sent to a material recycling department or a government-approved unit with corresponding treatment qualifications for professional disposal, and random disposal or improper treatment is strictly prohibited.

[0164] In the embodiment of the present application, the pollution control measures throughout the construction process include a systematic construction solid waste management scheme, which takes source reduction, classified collection, centralized treatment and compliant disposal as the core principles.

[0165] First, at the source of waste generation, the construction personnel are encouraged to save materials to minimize the generation of waste.

[0166] Second, in the waste management link of the construction site, a strict collection and storage system is established. Random piling of garbage, sundries and random burning of residual waste are strictly prohibited on site. For this purpose, a number of movable garbage cans are set up in the office area and temporary garbage yards or stacking points covered by a health package area are established at appropriate locations on the construction site. These collection facilities are managed by special personnel and the principle of daily collection and daily cleaning is strictly implemented to ensure that garbage and leftover materials are cleaned and stacked in a timely manner.

[0167] A key technical feature of the scheme is the classified management and isolation measures of waste. A special temporary storage site for waste is set up on the construction site, and all waste (such as scrap steel, scrap pipe, scrap wire, scrap equipment and the like accessories and leftover materials) must be classified and stored here. For waste that may cause secondary pollution (such as waste oil, waste liquid and waste residue), more strict isolation management must be carried out: not only separate storage, but also safety precautions must be provided and prominent signs must be attached to prevent confusion or improper contact.

[0168] Finally, in the final disposal of waste, the program provides a clear process and destination. On the one hand, for the waste still has recycling value, should be recycled, unified to the material recycling department for disposal. On the other hand, for other waste, must be regularly shipped. In the process of transportation, it must be ensured that there is no spilling, no mixing, and finally transported to the designated place agreed by the local environmental protection department or the government approved unit, place for final disposal, to prevent pollution to the external environment.

Claims

1. A method for pollution prevention and pre-buried construction of electromechanical pipelines in greenways of water source protection areas, characterized in that, The method includes, in sequence: S1. Conduct construction preparation and pollution prevention briefing, and complete the material verification and pollution prevention requirements before construction. S2. Conduct anti-pollution trenching and waterproof sleeve pre-embedding to form trenches and channels for laying pipelines; S3. Lay the pipeline and connect it to prevent leakage, forming a complete pipeline system; S4. Backfill the anti-pollution trench, cover and fix the pipeline system; S5. Conduct a tightness test and seal the finished product. The tightness test is conducted using the water tightness test method and is carried out after backfilling the top of the pipe to a height equal to one pipe diameter. During the test, all pipe joints are kept exposed for observation. S6. Implement pollution control measures throughout the entire construction process. These measures include classifying and treating construction wastewater. Specifically, canteen wastewater is treated by an oil separator, toilet wastewater is treated by a septic tank, and production and domestic wastewater is treated by a three-stage sedimentation tank before being discharged into the municipal sewage network.

2. The method for pollution prevention pre-buried construction of electromechanical pipelines applicable to greenways in water source protection areas according to claim 1, characterized in that, In step S1, the construction preparation and pollution prevention briefing steps include: verifying that the warehouse storing oil and chemicals has been treated to prevent leakage.

3. The method for pollution prevention pre-buried construction of electromechanical pipelines applicable to greenways in water source protection areas according to claim 2, characterized in that, The construction preparation and pollution prevention briefing steps also include: verifying that stainless steel containers are placed below the oil and chemical outlets to receive dripping oil.

4. The method for pollution prevention pre-buried construction of electromechanical pipelines applicable to greenways in water source protection areas according to claim 1, characterized in that, In step S2, the steps of anti-pollution grooving and waterproof sleeve pre-embedding include: spraying water on the work area before using the grinding wheel grooving machine for grooving, and covering the grinding wheel grooving machine with a dust cover before carrying out the grooving operation.

5. The method for pollution prevention pre-buried construction of electromechanical pipelines applicable to greenways in water source protection areas according to claim 1, characterized in that, In step S3, the pipeline laying and leak-proof connection steps include: when the pipeline is a galvanized steel conduit, a special grounding wire clamp is used for bridging the grounding wire, and welding bridging is strictly prohibited.

6. The method for pollution prevention pre-buried construction of electromechanical pipelines applicable to greenways in water source protection areas according to claim 1, characterized in that, In step S3, the pipeline laying and leak-proof connection steps further include: filling the gap between the pre-embedded sleeve and the pipeline with flame-retardant sealing material and waterproof sealant where the pipeline passes through the floor slab or wall.

7. The method for pollution prevention pre-buried construction of electromechanical pipelines applicable to greenways in water source protection areas according to claim 1, characterized in that, In step S4, the backfilling step of the anti-pollution trench includes: when the pipeline is located under the roadway or on soft soil foundation, the underside corner of the pipe is first filled and compacted with medium and coarse sand.

8. The method for pollution prevention pre-buried construction of electromechanical pipelines applicable to greenways in water source protection areas according to claim 7, characterized in that, After the axle area at the bottom of the pipe is filled and compacted, the next step includes: backfilling medium and coarse sand or stone chips in layers up to the top of the pipe.

9. The method for pollution prevention pre-buried construction of electromechanical pipelines applicable to greenways in water source protection areas according to claim 1, characterized in that, In step S5, the airtightness inspection and finished product sealing steps also include: when performing the lead wire threading operation on the concealed pipe, multiple copper wires are brought in at one time as a final inspection of the pipe's unobstructedness.

10. The method for pollution prevention pre-buried construction of electromechanical pipelines applicable to greenways in water source protection areas according to claim 1, characterized in that, The pollution control measures described in step S6, which run through the entire construction process, also include: classifying and managing construction solid waste, including storing waste that may cause secondary pollution separately, setting up safety precautions, and setting up conspicuous signs.

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