Anti-clogging rapid laying construction method for municipal drainage pipeline in pluvial area

Abstract

The invention discloses an anti-clogging rapid laying construction method for municipal drainage pipelines in a pluvial area, and relates to the technical field of municipal engineering. According to the method, through construction early-stage investigation and pretreatment, a high-pressure jet grouting pile and a steel sheet pile are combined to form a water interception curtain and vacuum well point dewatering is adopted, and a pipeline with a nanometer hydrophobic coating and a flow guide protruding edge is prefabricated; during rapid excavation, rapid hardening concrete is used for supporting, and a prefabricated module foundation with a permeable blind pipe is laid; laser positioning is adopted for hoisting, and double sealing is adopted for interfaces; graded gravel and a curing agent are used for backfilling, and ground penetrating radar is matched for detection; acceptance inspection is combined with a closed water test and an endoscope, and an intelligent monitoring device is installed to be connected into an intelligent system. The problems that construction efficiency is low and pipelines are prone to clogging in rainy areas are solved, the construction period is shortened by 30% or above, the initial clogging rate is reduced by 60%, and the method is suitable for drainage projects in areas with the annual precipitation being 800 mm or above.

Description

Technical Field

[0001] This invention relates to the field of municipal construction technology, specifically to a method for rapid laying of municipal drainage pipes in rainy areas to prevent siltation. Background Technology

[0002] In the field of municipal engineering construction, drainage pipeline systems are key infrastructure for ensuring the normal operation of cities. For rainy areas, the importance of drainage pipelines is even more self-evident, as they not only have to handle the daily discharge of sewage and rainwater, but also cope with the drainage pressure brought by frequent and heavy rainfall.

[0003] Traditional methods for constructing municipal drainage pipelines face numerous challenges in rainy areas. In the early stages of construction, the complex geological conditions of rainy regions, such as high-moisture soil and high groundwater levels, increase the difficulty of trench excavation and easily lead to problems such as slope collapse and foundation softening. At the same time, the unpredictability and high frequency of rainfall often disrupt construction plans, causing delays. For example, during trench excavation, a sudden downpour can cause instantaneous water accumulation in the trench, affecting not only the normal operation of construction equipment but also potentially damaging the structural stability of the already excavated trench.

[0004] In terms of drainage pipe laying, traditional methods are difficult to effectively solve the problem of pipe blockage. On the one hand, rainwater carries a large amount of silt and debris, which tends to settle and accumulate when the flow rate slows down in the pipe, reducing the pipe's water carrying capacity. On the other hand, conventional pipe joint sealing and connection methods are easily affected in rainy and humid environments, which may lead to pipe leakage, further causing soil erosion in the surrounding area, affecting the safety of the pipe structure, and may also cause sewage overflow and environmental pollution.

[0005] Furthermore, traditional construction methods in rainy areas have revealed problems such as low efficiency and difficulty in ensuring quality in pipeline foundation treatment, backfilling, and acceptance monitoring. For example, traditional pipeline foundation construction processes are complex and have long construction cycles, making them difficult to adapt to the variable construction environment in rainy areas; during backfilling, the high soil moisture content leads to poor compaction, which can easily cause uneven settlement of the pipeline later; and traditional acceptance monitoring methods cannot accurately and in real time grasp the blockage of drainage pipelines during operation, making it difficult to take effective maintenance measures in a timely manner. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the existing methods and provide a rapid construction method for preventing siltation in municipal drainage pipes in rainy areas.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a method for rapid laying of municipal drainage pipes in rainy areas to prevent siltation, comprising the following steps:

[0008] S1, Pre-construction survey and pre-treatment:

[0009] In response to the characteristics of rainy areas, geological surveys were conducted along the pipeline route to investigate the water content, groundwater level, and rainfall cycle. Based on the survey results, temporary cutoff walls were set up around the area to be laid. The cutoff walls adopted a combination structure of high-pressure jet grouting piles and steel sheet piles. The diameter of the high-pressure jet grouting piles was 500-600mm, the overlap length of adjacent piles was not less than 100mm, and the steel sheet piles were inserted to a depth 2-3m deeper than the pipeline base. The vacuum wellpoint dewatering method was used to lower the groundwater level to a predetermined depth below the pipeline base.

[0010] Prefabricated drainage pipes with anti-clogging structures include a nano-level hydrophobic coating on the inner wall of the pipe and a flow-guiding ridge set at the bottom of the pipe along the water flow direction. The cross section of the flow-guiding ridge is an isosceles triangle, the height is 1 / 20-1 / 15 of the inner diameter of the pipe, the spacing between adjacent ridges is 50-80cm, and the surface of the ridge is polished.

[0011] During pipe prefabrication, positioning pins and positioning holes are set at both ends of the pipe section. The fit tolerance between the diameter of the positioning pin and the diameter of the positioning hole is H7 / g6 to ensure the coaxiality of the pipes when they are connected.

[0012] S2, Rapid Excavation and Foundation Treatment:

[0013] Hydraulic breakers are used in conjunction with tracked excavators for trench excavation. During the excavation process, quick-setting concrete is sprayed onto the trench wall using a slope spraying and anchoring machine to form temporary support. The initial setting time of the quick-setting concrete is no more than 15 minutes, and the spraying thickness is 5-8cm. A single layer of steel mesh is installed inside, with a mesh spacing of 10×10cm.

[0014] After the trench is formed, a precast concrete module foundation is laid on the base. The module foundation is made of C30 concrete. Anti-slip teeth are set at the bottom of the module, and bolt holes for connection with pipe supports are reserved inside the module. Permeable blind pipes with a diameter of 100-150mm are embedded inside the module foundation and wrapped with geotextile. The modules are quickly spliced ​​together by mortise and tenon structure.

[0015] Temporary tracks are set up on both sides of the trench, and pipe support trolleys with lifting functions are placed on the tracks to assist the pipes in moving to the docking position and reduce the hoisting and hovering time.

[0016] S3, Anti-clogging pipe hoisting and connection:

[0017] The prefabricated pipes are lifted into the trench using a crawler crane with laser positioning. The positioning accuracy of the laser positioning crawler crane is controlled within ±3mm.

[0018] The pipe joint is equipped with a double sealing structure, with a water-swellable rubber ring on the inside and a quick-release metal clamp on the outside. The clamp is tightened using an electric torque wrench, with the tightening torque set at 300-350 N·m.

[0019] After the connection is completed, the slope is checked using a pipeline axis laser calibrator to ensure that the pipeline slope is not less than 0.5%.

[0020] S4, Immediate anti-clogging treatment and backfilling:

[0021] Biodegradable non-woven fabric is used to temporarily seal both ends of the pipeline to prevent construction debris from entering. The biodegradable non-woven fabric is made of polypropylene with a thickness of not less than 2mm and is detachably connected to the pipeline port by elastic rope. It is removed after backfilling to the design elevation.

[0022] Backfilling is carried out in layers of graded sand and gravel, with each layer not exceeding 30cm in thickness, and compacted quickly using a small vibratory roller. Pipe displacement is monitored simultaneously during the compaction process.

[0023] S5, Rapid Acceptance and Installation of Anti-Clogging Monitoring Device:

[0024] Acceptance was conducted using a combination of water tightness testing and CCTV pipeline endoscopy.

[0025] After acceptance, ultrasonic flow monitors and siltation early warning sensors are installed at the beginning and bends of the pipeline and connected to the municipal drainage smart management system. The siltation early warning sensor is an ultrasonic Doppler sensor with a monitoring frequency of once per hour. When the siltation rate of the pipeline cross section exceeds 15%, an early warning signal is automatically issued.

[0026] Preferably, in step S1, the rainfall characteristics of rainy areas are analyzed, historical rainfall data is combined with real-time meteorological monitoring to predict the period of heavy rainfall during construction, and protective measures such as covering the excavated trench with waterproof geotextile and setting up temporary drainage pump sets are taken before the arrival of heavy rainfall. The drainage capacity of the drainage pump sets is configured to be 1.5 times the maximum possible water accumulation in the trench.

[0027] Preferably, in step S2, an electromagnetic induction element is pre-embedded in the foundation of the precast concrete module. After the pipeline is installed, the connection status between the foundation and the pipeline is quickly detected by a handheld electromagnetic detection device on the ground. The module is judged to be misaligned and the pipeline is stable based on the change of electromagnetic induction signal.

[0028] Preferably, in step S3, before the pipeline is hoisted, the pipeline is pre-assembled and debugged to check the fit between the positioning pin and the positioning hole. At the same time, the center line and interface position mark are marked on the outer wall of the pipeline to facilitate quick alignment during hoisting. The pre-assembly and debugging time is controlled within 10 minutes for a single pipe section.

[0029] Preferably, in step S4, a certain proportion of curing agent is added to the backfill graded sand and gravel. The amount of curing agent is 3%-5% of the mass of the sand and gravel, so as to improve the early strength and erosion resistance of the backfill material and shorten the time when the pipeline can withstand the upper load after backfilling.

[0030] Preferably, in step S5, a drainage pipeline anti-clogging early warning model based on big data analysis is established. The data from flow monitoring instruments, clogging early warning sensors, and surrounding environmental data (such as rainfall and surface runoff) are comprehensively analyzed to predict the pipeline clogging risk level in advance, and the early warning information is pushed to maintenance personnel through a mobile APP.

[0031] Preferably, in step S2, during the trench excavation process, three-dimensional laser scanning technology is used to collect trench shape and size data in real time, compare it with the design data, and adjust the excavation parameters in a timely manner to ensure that the trench meets the design requirements. The three-dimensional laser scanning frequency is once every 5m of excavation.

[0032] Preferably, in step S3, the quick-install metal clamp on the outside of the pipe interface adopts an adjustable clamping force structure. By rotating the adjusting bolt, the clamping force can be finely adjusted according to the actual installation of the pipe to ensure the sealing effect of the interface. The relationship between the adjusting bolt torque and the clamping force is calibrated by test and recorded in the construction manual.

[0033] Preferably, in step S1, after the construction of the water-cutting curtain is completed, a water injection test is conducted to check its water-cutting effect. The test time is not less than 24 hours. If a leakage point is found, it is sealed by pressure grouting. The grouting material is a mixture of ultrafine cement and water glass.

[0034] Preferably, in step S4, during the backfilling process, ground-penetrating radar is used to perform non-destructive testing on the backfilling quality. Testing is conducted every 10m to detect the compaction of the backfilling material and whether there are defects such as voids. Based on the test results, the compaction parameters are adjusted in a timely manner or the defective parts are reworked.

[0035] Compared with the prior art, the beneficial effects of the present invention are:

[0036] Pre-construction survey and pre-treatment stage:

[0037] Precisely addressing geological and rainfall conditions: Through detailed investigation of geological moisture content, groundwater level, and rainfall cycle, a temporary cutoff wall combining high-pressure jet grouting piles and steel sheet piles was constructed, coupled with vacuum wellpoint dewatering, effectively lowering the groundwater level. This created a stable working environment for subsequent construction and significantly reduced construction interruptions and potential engineering hazards caused by rainwater and geological issues. For example, in a municipal drainage project in a rainy city, the incidence of ditch slope collapse accidents decreased by 80% after adopting this method.

[0038] Innovative anti-clogging prefabricated pipes: The nano-level hydrophobic coating on the inner wall of the pipe and the flow-guiding ridges at the bottom reduce the possibility of debris adhesion and clogging from the source. The nano-level hydrophobic coating makes water flow more smoothly inside the pipe, making it difficult for debris to adhere; the flow-guiding ridges change the water flow pattern, enhancing the flushing force of the water flow against silt and other sediment at the bottom. Simulation tests show that pipes using this structure have an anti-clogging capability that is more than 50% higher than traditional pipes.

[0039] Optimize pipe connection accuracy: The setting of positioning pins and positioning holes at both ends of the pipe section ensures coaxiality during pipe connection, improves connection quality, reduces the risk of poor water flow and local siltation caused by interface deviation, and speeds up construction. The connection time of a single pipe section can be shortened by about 30%.

[0040] Rapid excavation and foundation treatment stage:

[0041] Highly efficient and safe trench excavation: Hydraulic breakers combined with tracked excavators, along with slope shotcrete machines to spray quick-setting concrete to form temporary supports, significantly improve trench excavation efficiency while ensuring construction safety. The short initial setting time of the quick-setting concrete, the appropriate spraying thickness, and the reasonable setting of the steel mesh ensure that the trench slope remains stable even under rainfall conditions, increasing construction efficiency by approximately 40% compared to traditional methods.

[0042] Convenient and stable foundation installation: The precast concrete modular foundation uses C30 concrete and features anti-slip teeth on the bottom, internal bolt holes, and permeable blind pipes. Combined with mortise and tenon joints, it not only allows for quick and easy installation but also provides excellent foundation stability, effectively distributing pipe loads and preventing pipe settlement. Simultaneously, the permeable blind pipes promptly drain water from the base, reducing rainwater erosion. Testing has shown that this foundation's load-bearing capacity is 25% higher than traditional foundations.

[0043] Innovative auxiliary pipeline installation equipment: The application of temporary tracks on both sides of the trench and pipeline support trolleys with lifting functions greatly reduces the pipeline hoisting and pausing time, improves installation accuracy and efficiency, reduces construction safety risks, and increases pipeline installation efficiency by about 35%.

[0044] Pipeline hoisting and connection stage for preventing clogging:

[0045] High-precision hoisting and rapid connection: The crawler crane with laser positioning offers high positioning accuracy. Combined with pre-assembled and debugged pipelines and external wall markings, this ensures rapid and accurate pipeline hoisting and alignment. The double-sealing structure of the pipeline joints and the electric torque wrench tightening clamps ensure effective sealing and connection strength, effectively preventing leakage and reducing pipeline blockage and maintenance costs caused by joint problems. Actual engineering verification shows that after adopting this method, the pipeline joint leakage rate has been reduced to below 5%.

[0046] Precise slope verification: The pipeline axis laser calibrator ensures that the pipeline slope meets the requirements, guaranteeing smooth drainage and effectively avoiding water flow obstruction and siltation caused by improper slope, thus improving drainage efficiency. According to tests, the drainage capacity of pipelines laid using this method is about 30% higher than that of pipelines with poor slope control.

[0047] Immediate anti-clogging treatment and backfilling stage:

[0048] Effectively prevents blockages during construction: Biodegradable non-woven fabric is used as a temporary seal at both ends of the pipeline, effectively preventing construction debris from entering and avoiding potential blockage risks during construction. The non-woven fabric is also biodegradable, environmentally friendly, and pollution-free. During backfilling, graded sand and gravel are backfilled in layers with a hardener added. This improves the early strength and erosion resistance of the backfill material and shortens the time the pipeline can withstand the load from above after backfilling, ensuring project progress and quality. Testing showed that the early strength of the backfill material with the added hardener increased by 40% compared to the material without the hardener.

[0049] Reliable backfill quality control: Ground penetrating radar is used to perform non-destructive testing on backfill quality, which can promptly detect defects such as the compactness and voids of backfill materials, ensuring backfill quality, reducing the risk of pipeline deformation and subsidence caused by improper backfilling, and guaranteeing the long-term stable operation of drainage pipelines.

[0050] Rapid acceptance and installation phase of anti-clogging monitoring device:

[0051] Comprehensive and efficient acceptance methods: The acceptance method combining water tightness test and CCTV pipeline endoscopy can comprehensively and accurately detect the sealing and internal condition of the pipeline, ensuring that the quality of drainage pipelines meets the requirements and avoiding subsequent problems caused by the use of unqualified pipelines.

[0052] Intelligent real-time anti-clogging monitoring: Ultrasonic flow monitors and clogging early warning sensors are integrated into the municipal drainage intelligent management system, and an early warning model based on big data analysis is established. This allows for real-time monitoring of pipeline operation, early prediction of clogging risks, and timely dissemination of early warning information. This facilitates targeted measures by maintenance personnel, significantly improving the operation and maintenance management level of drainage pipelines and reducing the risk of drainage problems and urban flooding caused by pipeline clogging. For example, in a drainage pipeline monitoring project in a certain city, after applying this system, the accuracy rate of pipeline clogging early warning reached over 90%, and the frequency of urban flooding was significantly reduced. Detailed Implementation

[0053] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0054] This invention provides the following technical solution: a method for rapid laying of municipal drainage pipes in rainy areas to prevent siltation, comprising the following steps:

[0055] S1, Pre-construction survey and pre-treatment:

[0056] In response to the characteristics of rainy areas, geological surveys were conducted along the pipeline route to investigate the water content, groundwater level, and rainfall cycle. Based on the survey results, temporary cutoff walls were set up around the area to be laid. The cutoff walls adopted a combination structure of high-pressure jet grouting piles and steel sheet piles. The diameter of the high-pressure jet grouting piles was 500-600mm, the overlap length of adjacent piles was not less than 100mm, and the steel sheet piles were inserted to a depth 2-3m deeper than the pipeline base. The vacuum wellpoint dewatering method was used to lower the groundwater level to a predetermined depth below the pipeline base.

[0057] Prefabricated drainage pipes with anti-clogging structures include a nano-level hydrophobic coating on the inner wall of the pipe and a flow-guiding ridge set at the bottom of the pipe along the water flow direction. The cross section of the flow-guiding ridge is an isosceles triangle, the height is 1 / 20-1 / 15 of the inner diameter of the pipe, the spacing between adjacent ridges is 50-80cm, and the surface of the ridge is polished.

[0058] During pipe prefabrication, positioning pins and positioning holes are set at both ends of the pipe section. The fit tolerance between the diameter of the positioning pin and the diameter of the positioning hole is H7 / g6 to ensure the coaxiality of the pipes when they are connected.

[0059] S2, Rapid Excavation and Foundation Treatment:

[0060] Hydraulic breakers are used in conjunction with tracked excavators for trench excavation. During the excavation process, quick-setting concrete is sprayed onto the trench wall using a slope spraying and anchoring machine to form temporary support. The initial setting time of the quick-setting concrete is no more than 15 minutes, and the spraying thickness is 5-8cm. A single layer of steel mesh is installed inside, with a mesh spacing of 10×10cm.

[0061] After the trench is formed, a precast concrete module foundation is laid on the base. The module foundation is made of C30 concrete. Anti-slip teeth are set at the bottom of the module, and bolt holes for connection with pipe supports are reserved inside the module. Permeable blind pipes with a diameter of 100-150mm are embedded inside the module foundation and wrapped with geotextile. The modules are quickly spliced ​​together by mortise and tenon structure.

[0062] Temporary tracks are set up on both sides of the trench, and pipe support trolleys with lifting functions are placed on the tracks to assist the pipes in moving to the docking position and reduce the hoisting and hovering time.

[0063] S3, Anti-clogging pipe hoisting and connection:

[0064] The prefabricated pipes are lifted into the trench using a crawler crane with laser positioning. The positioning accuracy of the laser positioning crawler crane is controlled within ±3mm.

[0065] The pipe joint is equipped with a double sealing structure, with a water-swellable rubber ring on the inside and a quick-release metal clamp on the outside. The clamp is tightened using an electric torque wrench, with the tightening torque set at 300-350 N·m.

[0066] After the connection is completed, the slope is checked using a pipeline axis laser calibrator to ensure that the pipeline slope is not less than 0.5%.

[0067] S4, Immediate anti-clogging treatment and backfilling:

[0068] Biodegradable non-woven fabric is used to temporarily seal both ends of the pipeline to prevent construction debris from entering. The biodegradable non-woven fabric is made of polypropylene with a thickness of not less than 2mm and is detachably connected to the pipeline port by elastic rope. It is removed after backfilling to the design elevation.

[0069] Backfilling is carried out in layers of graded sand and gravel, with each layer not exceeding 30cm in thickness, and compacted quickly using a small vibratory roller. Pipe displacement is monitored simultaneously during the compaction process.

[0070] S5, Rapid Acceptance and Installation of Anti-Clogging Monitoring Device:

[0071] Acceptance was conducted using a combination of water tightness testing and CCTV pipeline endoscopy.

[0072] After acceptance, ultrasonic flow monitors and siltation early warning sensors are installed at the beginning and bends of the pipeline and connected to the municipal drainage smart management system. The siltation early warning sensor is an ultrasonic Doppler sensor with a monitoring frequency of once per hour. When the siltation rate of the pipeline cross section exceeds 15%, an early warning signal is automatically issued.

[0073] Preferably, in step S1, the rainfall characteristics of rainy areas are analyzed, historical rainfall data is combined with real-time meteorological monitoring to predict the period of heavy rainfall during construction, and protective measures such as covering the excavated trench with waterproof geotextile and setting up temporary drainage pump sets are taken before the arrival of heavy rainfall. The drainage capacity of the drainage pump sets is configured to be 1.5 times the maximum possible water accumulation in the trench.

[0074] Preferably, in step S2, an electromagnetic induction element is pre-embedded in the foundation of the precast concrete module. After the pipeline is installed, the connection status between the foundation and the pipeline is quickly detected by a handheld electromagnetic detection device on the ground. The module is judged to be misaligned and the pipeline is stable based on the change of electromagnetic induction signal.

[0075] Preferably, in step S3, before the pipeline is hoisted, the pipeline is pre-assembled and debugged to check the fit between the positioning pin and the positioning hole. At the same time, the center line and interface position mark are marked on the outer wall of the pipeline to facilitate quick alignment during hoisting. The pre-assembly and debugging time is controlled within 10 minutes for a single pipe section.

[0076] Preferably, in step S4, a certain proportion of curing agent is added to the backfill graded sand and gravel. The amount of curing agent is 3%-5% of the mass of the sand and gravel, so as to improve the early strength and erosion resistance of the backfill material and shorten the time when the pipeline can withstand the upper load after backfilling.

[0077] Preferably, in step S5, a drainage pipeline anti-clogging early warning model based on big data analysis is established. The data from flow monitoring instruments, clogging early warning sensors, and surrounding environmental data (such as rainfall and surface runoff) are comprehensively analyzed to predict the pipeline clogging risk level in advance, and the early warning information is pushed to maintenance personnel through a mobile APP.

[0078] Preferably, in step S2, during the trench excavation process, three-dimensional laser scanning technology is used to collect trench shape and size data in real time, compare it with the design data, and adjust the excavation parameters in a timely manner to ensure that the trench meets the design requirements. The three-dimensional laser scanning frequency is once every 5m of excavation.

[0079] Preferably, in step S3, the quick-install metal clamp on the outside of the pipe interface adopts an adjustable clamping force structure. By rotating the adjusting bolt, the clamping force can be finely adjusted according to the actual installation of the pipe to ensure the sealing effect of the interface. The relationship between the adjusting bolt torque and the clamping force is calibrated by test and recorded in the construction manual.

[0080] Preferably, in step S1, after the construction of the water-cutting curtain is completed, a water injection test is conducted to check its water-cutting effect. The test time is not less than 24 hours. If a leakage point is found, it is sealed by pressure grouting. The grouting material is a mixture of ultrafine cement and water glass.

[0081] Preferably, in step S4, during the backfilling process, ground-penetrating radar is used to perform non-destructive testing on the backfilling quality. Testing is conducted every 10m to detect the compaction of the backfilling material and whether there are defects such as voids. Based on the test results, the compaction parameters are adjusted in a timely manner or the defective parts are reworked.

[0082] Pre-construction survey and pretreatment (S1)

[0083] Multidimensional exploration technology system:

[0084] A combination of a TRT6000 ground-penetrating radar (detection depth 5-30m) and a DJI Phantom 4 RTK drone (accuracy 1cm) was used for surveying to obtain soil moisture content at a depth of 0-5m (sampling point density 2 / m²).2 ), groundwater level depth (monitoring frequency 1 time / 2 hours, lasting 72 hours) and rainfall data for the past 10 years (resolution 0.5 hours).

[0085] A rainfall-groundwater level response model was established to predict the water level rise during the construction period (error ≤ 5cm), and the depth of the cutoff curtain and the rainfall intensity were determined accordingly.

[0086] Composite interception and precipitation system:

[0087] High-pressure jet grouting piles are constructed using the single-pipe method, with a cement dosage of 300-400 kg / m, a water-cement ratio of 1:1-1.5:1, and a lifting speed of 10-20 cm / min, ensuring that the unconfined compressive strength of the pile body is ≥2 MPa; the steel sheet piles are of Larsen type IV (400 mm wide, 15 mm thick), driven in using a vibratory hammer (excitation force 150-200 kN), and the interlocking joints of adjacent piles are coated with grease (viscosity 300-400 cSt) to reduce friction.

[0088] The vacuum well point system consists of a Φ100mm well pipe (filter pipe length 1.5-2.0m) and a vacuum pump (vacuum degree ≥0.08MPa). The well point spacing is 1.5-2.0m, forming a closed dewatering ring to ensure that the water level is stable at 1.2-1.5m below the bottom of the pipe (fluctuation amplitude ≤5cm).

[0089] Prefabrication process for anti-clogging pipelines:

[0090] The nanoscale hydrophobic coating is prepared by sol-gel method, with SiO2 as the substrate and 1%-3% fluorosilane modifier added. It is applied by high-pressure airless spraying (pressure 15-20MPa). The coating adhesion is ≥5MPa (cross-cut test) and the salt spray resistance is ≥500 hours.

[0091] The guide ridges are integrally molded with a ridge top arc radius of 5-8mm and a surface roughness Ra≤0.8μm (detected by a laser profilometer). The spacing (50-80cm) is optimized through CFD fluid simulation to ensure that the bottom flow velocity is increased by more than 25%.

[0092] The locating pins are made of 45 steel with heat treatment (hardness HRC25-30), and the locating holes are machined by boring. The fit clearance is 0.01-0.03mm to ensure that the coaxiality of the mating is ≤3mm (detected by laser interferometer).

[0093] 2. Rapid excavation and foundation treatment (S2)

[0094] Dynamic support excavation method:

[0095] The excavation equipment used is a hydraulic breaker (model SB81, impact energy 800J) paired with a 360° tracked excavator (bucket capacity 1.2m³). 3The excavation adopts a "layered excavation + immediate support" mode, with each layer having an excavation depth of ≤1.5m.

[0096] Quick-setting concrete uses PO42.5R cement (admixture dosage 350-400 kg / m³). 3 The mixture consists of silica fume (10% replacement rate) and accelerator (3%-5% dosage). The initial setting time is 8-12 minutes, and the final setting time is 20-25 minutes. The spraying process adopts wet spraying (working pressure 0.3-0.5MPa). The steel mesh is HRB400 grade (6mm diameter), with an overlap length ≥30d, and is welded and fixed to the anchor rod (Φ20mm, length 1.5m).

[0097] Modular foundation construction technology:

[0098] The precast concrete modules use C30 concrete (with 20% fly ash) and are steam-cured (80℃, 6 hours) to ensure a strength of ≥35MPa after 28 days. The anti-slip teeth are 10mm high and have an isosceles triangle cross section (vertex angle 60°). The anti-slip coefficient is verified to be ≥0.6 through shear tests.

[0099] The permeable blind pipe uses HDPE double-wall corrugated pipe (ring stiffness ≥8kN / m). 2 ), outer packaging 200g / m 2 Short fiber geotextile (permeability coefficient 1×10-3) cm / s), and the module's reserved slot is sealed with polyurethane sealant (elongation ≥300%).

[0100] The mortise and tenon structure uses male and female tenons (tolerance H7 / h6). Epoxy resin adhesive (compressive strength ≥60MPa) is applied during splicing. The installation time for a single module is ≤5 minutes, and the joint flatness is ≤2mm.

[0101] Auxiliary track system design:

[0102] The temporary track is made of H200×100 steel (material Q235B), with a concrete support (500×500×300mm) every 6m. The flatness of the track top surface is ≤3mm / 2m (tested with a level).

[0103] The pipe support trolley adopts a steel structure frame (load capacity 5t), equipped with an electric lifting system (stroke 300mm, accuracy ±1mm) and polyurethane rollers (hardness Shore A85), with a translation speed of 0.5-1.0m / min and a positioning error ≤5mm.

[0104] 3. Pipeline hoisting and connection to prevent clogging (S3)

[0105] Precision hoisting and positioning technology:

[0106] The laser-positioned crawler crane (model XGC25T) is equipped with a Leica TS60 total station (accuracy ±1mm +1ppm) and adopts the "three-point lifting + laser guidance" mode. The lifting point is set above the center of gravity of the pipe (deviation ≤50mm) and the lifting angle is ≤60° to avoid pipe bending and deformation (deflection ≤L / 2000).

[0107] Before hoisting, the path is simulated using a BIM model to generate three-dimensional positioning coordinates (accuracy ±2mm). The outer wall of the pipe section is marked with reflective stickers to indicate the axis (red) and interface line (yellow), and real-time calibration is performed with a handheld laser target (accuracy ±1mm).

[0108] Double-sealed connection structure:

[0109] The water-swellable rubber ring uses butyl rubber as the base material and adds 20%-30% expansion agent (water absorption ratio ≥250%). The cross-sectional dimension tolerance is ±0.5mm. Apply silicone oil (viscosity 50-100cSt) for lubrication during installation.

[0110] The quick-install metal clamp is made of Q355B steel plate (thickness 8-10mm) and is equipped with 3 sets of M16 adjusting bolts (8.8 grade). The tightening force (300-350N·m) is controlled by a torque wrench (accuracy ±2%) to ensure uniform compression of the interface (deviation ≤1mm).

[0111] After the interface is assembled, an airtightness test is performed (pressure 0.2MPa, pressure drop ≤5% after holding for 30min), and polysulfide sealant (elongation ≥300%) is applied to enhance durability.

[0112] Slope laser calibration system:

[0113] A total station (model TS60, angle measurement accuracy 0.5%) was used in conjunction with a laser line projector (accuracy ±0.05%), with a slope control point set every 5m to monitor the pipeline elevation in real time (error ≤2mm) to ensure that the drainage slope is ≥0.5% and the linear deviation is ≤0.05%.

[0114] 3. Pipeline hoisting and connection to prevent clogging (S3)

[0115] Precision hoisting and positioning technology:

[0116] The laser-positioned crawler crane (model XGC25T) is equipped with a Leica TS60 total station (accuracy ±1mm +1ppm) and adopts the "three-point lifting + laser guidance" mode. The lifting point is set above the center of gravity of the pipe (deviation ≤50mm) and the lifting angle is ≤60° to avoid pipe bending and deformation (deflection ≤L / 2000).

[0117] Before hoisting, the path is simulated using a BIM model to generate three-dimensional positioning coordinates (accuracy ±2mm). The outer wall of the pipe section is marked with reflective stickers to indicate the axis (red) and interface line (yellow), and real-time calibration is performed with a handheld laser target (accuracy ±1mm).

[0118] Double-sealed connection structure:

[0119] The water-swellable rubber ring uses butyl rubber as the base material and adds 20%-30% expansion agent (water absorption ratio ≥250%). The cross-sectional dimension tolerance is ±0.5mm. Apply silicone oil (viscosity 50-100cSt) for lubrication during installation.

[0120] The quick-install metal clamp is made of Q355B steel plate (thickness 8-10mm) and is equipped with 3 sets of M16 adjusting bolts (8.8 grade). The tightening force (300-350N·m) is controlled by a torque wrench (accuracy ±2%) to ensure uniform compression of the interface (deviation ≤1mm).

[0121] After the interface is assembled, an airtightness test is performed (pressure 0.2MPa, pressure drop ≤5% after holding for 30min), and polysulfide sealant (elongation ≥300%) is applied to enhance durability.

[0122] Slope laser calibration system:

[0123] A total station (model TS60, angle measurement accuracy 0.5%) was used in conjunction with a laser line projector (accuracy ±0.05%), with a slope control point set every 5m to monitor the pipeline elevation in real time (error ≤2mm) to ensure that the drainage slope is ≥0.5% and the linear deviation is ≤0.05%.

[0124] 4. Immediate anti-clogging treatment and backfilling (S4)

[0125] Measures to prevent siltation during construction:

[0126] The temporary sealing nonwoven fabric is made of polypropylene spunbond-meltblown composite process, with a basis weight of 200g / m². 2 The tensile strength is ≥20MPa (longitudinal and transverse), the puncture strength of CBR is ≥3.2kN, and the degradation period is 6-12 months (soil environment).

[0127] The elastic rope is woven from polyester industrial yarn (8mm in diameter), with a breaking strength ≥5kN. The rope knot uses a double overlock knot (efficiency coefficient ≥80%) to ensure a tight seal (no leakage under water pressure of 0.1MPa).

[0128] High-performance backfill technology:

[0129] The graded sand and gravel adopts continuous gradation (particle size 0-50mm), with a non-uniformity coefficient Cu = 10-20 and a curvature coefficient Cc = 1-3. The optimum moisture content (12%-15%) is determined through heavy compaction test.

[0130] The curing agent is sulfoaluminate cement (strength grade 42.5), with a dosage of 3%-5%. It is uniformly mixed using a forced mixer (300 r / min). The 7-day unconfined compressive strength is ≥3 MPa, and the permeability coefficient is ≤1×10⁻⁶. -6 cm / s.

[0131] The backfill layer thickness is 25-30cm. It is compacted 4-6 times with a 2t vibratory roller (excitation force 30-50kN). The compaction direction is parallel to the pipeline axis. The corner areas are compacted with a plate vibrator (amplitude 1.5mm).

[0132] Backfill quality monitoring system:

[0133] Ground penetrating radar (model SIR-4000, antenna frequency 500MHz) scans longitudinally along the trench with a sampling interval of 5cm. Data processing is performed using ReflexW software to identify cavities ≥2cm (accuracy ≥95%).

[0134] For unqualified areas, grouting reinforcement is used (the material is cement-water glass double liquid grout, water-cement ratio 1:1, gel time 30-60s), grouting pressure 0.3-0.5MPa, until radar detection shows no abnormalities.

[0135] 5. Rapid Acceptance and Anti-Clogging Monitoring (S5)

[0136] Two-dimensional acceptance system:

[0137] The water tightness test adopts the "constant pressure method". The test section length is ≤1km, the water head height is 1.5m, the observation time is 30min, and the seepage volume is calculated by the formula: Q=W / (T·L). The qualified standard is: Q≤0.01L / (m·min) when DN≤600mm; Q≤0.05L / (m·min) when DN>600mm.

[0138] The CCTV endoscope (model PushCam HD) is equipped with a high-definition camera (1920×1080 resolution), a crawling speed of 3-5m / min, and inspects the following: inner wall flatness (deviation ≤5mm), interface sealing, and integrity of the guide ridge, generating a digital inspection report.

[0139] Internet of Things (IoT) monitoring system:

[0140] Sensor placement: Ultrasonic flow meters (range 0.1-3m / s, accuracy ±1%) are installed at the start and end points, and ultrasonic Doppler sensors (sampling frequency 1Hz, resolution 0.5mm / s) are installed at the bends. Data is transmitted wirelessly to the gateway via LoRa (distance ≥1km).

[0141] The intelligent platform adopts a B / S architecture, integrates GIS maps and real-time data dashboards, and establishes a siltation prediction model (LSTM algorithm). Input parameters include: flow rate, flow velocity, rainfall, and historical siltation data, with a prediction accuracy of ≥90%.

[0142] Early warning levels: Yellow warning (15% siltation rate) triggers inspection instructions, orange warning (25%) initiates siltation preparation, and red warning (35%) implements emergency siltation. Information is pushed to the operation and maintenance team via APP (response time ≤10s).

[0143] Supplementary Explanation of Preferred Solution

[0144] Heavy rainfall emergency response:

[0145] Based on the 72-hour rainfall forecast obtained through the meteorological bureau's API interface (accuracy 1km×1km), when the predicted daily precipitation is ≥50mm, an emergency drainage pump set (model 80WQ40-15, flow rate 40m³) is deployed 24 hours in advance. 3 / h), and set up water collection wells (2m³ / h) every 50m along the trench. 3 This forms a three-dimensional drainage system of "interception-drainage-guidance".

[0146] The trench is covered with waterproof geotextile (PE material, 1.5mm thick, hydrostatic pressure ≥0.3MPa) + steel frame (3m spacing), with edge weight ≥5kN / m to prevent rainwater from eroding the trench wall.

[0147] Electromagnetic induction basic monitoring:

[0148] The electromagnetic induction element uses a rare earth permanent magnet (residual magnetism 1.2T) and is pre-embedded in the center of the module (error ≤5mm). A handheld detector (sensitivity 1mV) is moved along the pipeline, and the module misalignment (≥10mm) or pipeline settlement (≥5mm) is judged by the change in magnetic field strength (ΔB≤5%).

[0149] 3D laser scanning quality control:

[0150] Using a Faro Focus S70 scanner (accuracy ±2mm), a panoramic scan was performed every 5m of excavation, achieving a point cloud density of ≥100 points / cm². 2 By comparing the design model with Geomagic software, a deviation chromatogram is generated, and excavation parameters are adjusted in real time for areas exceeding the tolerance (≥50mm).

[0151] Adjustable clamp optimization:

[0152] The clamping force is calibrated using a pressure sensor (accuracy ±1%) to establish a "torque-clamping force" relationship curve (R). 2≥0.99), the construction manual includes a torque parameter table for different pipe diameters (e.g., 320±10N·m for DN800 pipe) to ensure consistent sealing performance.

[0153] Water-cutting curtain performance testing:

[0154] The water injection test adopted a graded pressure increase method (0.1MPa→0.2MPa→0.3MPa), with each stage stabilizing for 30 minutes. The seepage volume was measured by a flow meter (accuracy ±0.5%), and the allowable leakage volume was ≤0.01L / (m·min). The leakage points were sealed by grouting with ultrafine cement (particle size ≤5μm) + water glass (modulus 3.2), and the grouting pressure was 1.2-1.5 times the water head pressure.

[0155] Pre-construction survey and pre-treatment stage:

[0156] Precisely addressing geological and rainfall conditions: Through detailed investigation of geological moisture content, groundwater level, and rainfall cycle, a temporary cutoff wall combining high-pressure jet grouting piles and steel sheet piles was constructed, coupled with vacuum wellpoint dewatering, effectively lowering the groundwater level. This created a stable working environment for subsequent construction and significantly reduced construction interruptions and potential engineering hazards caused by rainwater and geological issues. For example, in a municipal drainage project in a rainy city, the incidence of ditch slope collapse accidents decreased by 80% after adopting this method.

[0157] Innovative anti-clogging prefabricated pipes: The nano-level hydrophobic coating on the inner wall of the pipe and the flow-guiding ridges at the bottom reduce the possibility of debris adhesion and clogging from the source. The nano-level hydrophobic coating makes water flow more smoothly inside the pipe, making it difficult for debris to adhere; the flow-guiding ridges change the water flow pattern, enhancing the flushing force of the water flow against silt and other sediment at the bottom. Simulation tests show that pipes using this structure have an anti-clogging capability that is more than 50% higher than traditional pipes.

[0158] Optimize pipe connection accuracy: The setting of positioning pins and positioning holes at both ends of the pipe section ensures coaxiality during pipe connection, improves connection quality, reduces the risk of poor water flow and local siltation caused by interface deviation, and speeds up construction. The connection time of a single pipe section can be shortened by about 30%.

[0159] Rapid excavation and foundation treatment stage:

[0160] Highly efficient and safe trench excavation: Hydraulic breakers combined with tracked excavators, along with slope shotcrete machines to spray quick-setting concrete to form temporary supports, significantly improve trench excavation efficiency while ensuring construction safety. The short initial setting time of the quick-setting concrete, the appropriate spraying thickness, and the reasonable setting of the steel mesh ensure that the trench slope remains stable even under rainfall conditions, increasing construction efficiency by approximately 40% compared to traditional methods.

[0161] Convenient and stable foundation installation: The precast concrete modular foundation uses C30 concrete and features anti-slip teeth on the bottom, internal bolt holes, and permeable blind pipes. Combined with mortise and tenon joints, it not only allows for quick and easy installation but also provides excellent foundation stability, effectively distributing pipe loads and preventing pipe settlement. Simultaneously, the permeable blind pipes promptly drain water from the base, reducing rainwater erosion. Testing has shown that this foundation's load-bearing capacity is 25% higher than traditional foundations.

[0162] Innovative auxiliary pipeline installation equipment: The application of temporary tracks on both sides of the trench and pipeline support trolleys with lifting functions greatly reduces the pipeline hoisting and pausing time, improves installation accuracy and efficiency, reduces construction safety risks, and increases pipeline installation efficiency by about 35%.

[0163] Pipeline hoisting and connection stage for preventing clogging:

[0164] High-precision hoisting and rapid connection: The crawler crane with laser positioning offers high positioning accuracy. Combined with pre-assembled and debugged pipelines and external wall markings, this ensures rapid and accurate pipeline hoisting and alignment. The double-sealing structure of the pipeline joints and the electric torque wrench tightening clamps ensure effective sealing and connection strength, effectively preventing leakage and reducing pipeline blockage and maintenance costs caused by joint problems. Actual engineering verification shows that after adopting this method, the pipeline joint leakage rate has been reduced to below 5%.

[0165] Precise slope verification: The pipeline axis laser calibrator ensures that the pipeline slope meets the requirements, guaranteeing smooth drainage and effectively avoiding water flow obstruction and siltation caused by improper slope, thus improving drainage efficiency. According to tests, the drainage capacity of pipelines laid using this method is about 30% higher than that of pipelines with poor slope control.

[0166] Immediate anti-clogging treatment and backfilling stage:

[0167] Effectively prevents blockages during construction: Biodegradable non-woven fabric is used as a temporary seal at both ends of the pipeline, effectively preventing construction debris from entering and avoiding potential blockage risks during construction. The non-woven fabric is also biodegradable, environmentally friendly, and pollution-free. During backfilling, graded sand and gravel are backfilled in layers with a hardener added. This improves the early strength and erosion resistance of the backfill material and shortens the time the pipeline can withstand the load from above after backfilling, ensuring project progress and quality. Testing showed that the early strength of the backfill material with the added hardener increased by 40% compared to the material without the hardener.

[0168] Reliable backfill quality control: Ground penetrating radar is used to perform non-destructive testing on backfill quality, which can promptly detect defects such as the compactness and voids of backfill materials, ensuring backfill quality, reducing the risk of pipeline deformation and subsidence caused by improper backfilling, and guaranteeing the long-term stable operation of drainage pipelines.

[0169] Rapid acceptance and installation phase of anti-clogging monitoring device:

[0170] Comprehensive and efficient acceptance methods: The acceptance method combining water tightness test and CCTV pipeline endoscopy can comprehensively and accurately detect the sealing and internal condition of the pipeline, ensuring that the quality of drainage pipelines meets the requirements and avoiding subsequent problems caused by the use of unqualified pipelines.

[0171] Intelligent real-time anti-clogging monitoring: Ultrasonic flow monitors and clogging early warning sensors are integrated into the municipal drainage intelligent management system, and an early warning model based on big data analysis is established. This allows for real-time monitoring of pipeline operation, early prediction of clogging risks, and timely dissemination of early warning information. This facilitates targeted measures by maintenance personnel, significantly improving the operation and maintenance management level of drainage pipelines and reducing the risk of drainage problems and urban flooding caused by pipeline clogging. For example, in a drainage pipeline monitoring project in a certain city, after applying this system, the accuracy rate of pipeline clogging early warning reached over 90%, and the frequency of urban flooding was significantly reduced.

[0172] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for rapid laying of municipal drainage pipes in rainy areas to prevent siltation, characterized in that, Includes the following steps: S1, Pre-construction survey and pre-treatment: In response to the characteristics of rainy areas, geological surveys were conducted along the pipeline route to investigate the water content, groundwater level, and rainfall cycle. Based on the survey results, temporary cutoff walls were set up around the area to be laid. The cutoff walls adopted a combination structure of high-pressure jet grouting piles and steel sheet piles. The diameter of the high-pressure jet grouting piles was 500-600mm, the overlap length of adjacent piles was not less than 100mm, and the steel sheet piles were inserted to a depth 2-3m deeper than the pipeline base. The vacuum wellpoint dewatering method was used to lower the groundwater level to a predetermined depth below the pipeline base. Prefabricated drainage pipes with anti-clogging structures include a nano-level hydrophobic coating on the inner wall of the pipe and a flow-guiding ridge set at the bottom of the pipe along the water flow direction. The cross section of the flow-guiding ridge is an isosceles triangle, the height is 1 / 20-1 / 15 of the inner diameter of the pipe, the spacing between adjacent ridges is 50-80cm, and the surface of the ridge is polished. During pipe prefabrication, positioning pins and positioning holes are set at both ends of the pipe section. The fit tolerance between the diameter of the positioning pin and the diameter of the positioning hole is H7 / g6 to ensure the coaxiality of the pipes when they are connected. S2, Rapid Excavation and Foundation Treatment: Hydraulic breakers are used in conjunction with tracked excavators for trench excavation. During the excavation process, quick-setting concrete is sprayed onto the trench wall using a slope spraying and anchoring machine to form temporary support. The initial setting time of the quick-setting concrete is no more than 15 minutes, and the spraying thickness is 5-8cm. A single layer of steel mesh is installed inside, with a mesh spacing of 10×10cm. After the trench is formed, a precast concrete module foundation is laid on the base. The module foundation is made of C30 concrete. Anti-slip teeth are set at the bottom of the module, and bolt holes for connection with pipe supports are reserved inside the module. Permeable blind pipes with a diameter of 100-150mm are embedded inside the module foundation and wrapped with geotextile. The modules are quickly spliced ​​together by mortise and tenon structure. Temporary tracks are set up on both sides of the trench, and pipe support trolleys with lifting functions are placed on the tracks to assist the pipes in moving to the docking position and reduce the hoisting and hovering time. S3, Anti-clogging pipe hoisting and connection: The prefabricated pipes are lifted into the trench using a crawler crane with laser positioning. The positioning accuracy of the laser positioning crawler crane is controlled within 3mm. The pipe joint is equipped with a double sealing structure, with a water-swellable rubber ring on the inside and a quick-release metal clamp on the outside. The clamp is tightened using an electric torque wrench, with the tightening torque set at 300-350 N·m. After the connection is completed, the slope is checked using a pipeline axis laser calibrator to ensure that the pipeline slope is not less than 0.5%. S4, Immediate anti-clogging treatment and backfilling: Biodegradable non-woven fabric is used to temporarily seal both ends of the pipeline to prevent construction debris from entering. The biodegradable non-woven fabric is made of polypropylene with a thickness of not less than 2mm and is detachably connected to the pipeline port by elastic rope. It is removed after backfilling to the design elevation. Backfilling is carried out in layers of graded sand and gravel, with each layer not exceeding 30cm in thickness, and compacted quickly using a small vibratory roller. Pipe displacement is monitored simultaneously during the compaction process. S5, Rapid Acceptance and Installation of Anti-Clogging Monitoring Device: Acceptance was conducted using a combination of water tightness testing and CCTV pipeline endoscopy. After acceptance, ultrasonic flow monitors and siltation early warning sensors are installed at the beginning and bends of the pipeline and connected to the municipal drainage smart management system. The siltation early warning sensor is an ultrasonic Doppler sensor with a monitoring frequency of once per hour. When the siltation rate of the pipeline cross section exceeds 15%, an early warning signal is automatically issued.

2. The method for rapid laying of municipal drainage pipelines in rainy areas to prevent siltation, as described in claim 1, is characterized in that: In step S1, the rainfall characteristics of rainy areas are analyzed. Historical rainfall data is combined with real-time meteorological monitoring to predict the period of heavy rainfall during construction. Before the arrival of heavy rainfall, protective measures such as covering the excavated trench with waterproof geotextile and setting up temporary drainage pump sets are taken. The drainage capacity of the drainage pump sets is configured to be 1.5 times the maximum possible water accumulation in the trench.

3. The method for rapid laying of municipal drainage pipelines in rainy areas to prevent siltation, as described in claim 1, is characterized in that: In step S2, electromagnetic induction elements are pre-embedded in the foundation of the precast concrete module. After the pipeline is installed, the connection status between the foundation and the pipeline is quickly detected by a handheld electromagnetic detection device on the ground. The module is judged to be misaligned and the pipeline is stable based on the change of electromagnetic induction signal.

4. The method for rapid laying of municipal drainage pipelines in rainy areas to prevent siltation as described in claim 1, characterized in that: In step S3, before the pipeline is hoisted, the pipeline is pre-assembled and debugged to check the fit between the positioning pin and the positioning hole. At the same time, the center line and interface position are marked on the outer wall of the pipeline to facilitate quick alignment during hoisting. The pre-assembly and debugging time is controlled within 10 minutes for a single pipe section.

5. The method for rapid laying of municipal drainage pipelines in rainy areas to prevent siltation as described in claim 1, characterized in that: In step S4, a certain proportion of curing agent is added to the backfill graded sand and gravel. The amount of curing agent is 3%-5% of the mass of sand and gravel, so as to improve the early strength and erosion resistance of the backfill material and shorten the time when the pipeline can withstand the upper load after backfilling.

6. The method for rapid laying of municipal drainage pipelines in rainy areas to prevent siltation as described in claim 1, characterized in that: In step S5, a drainage pipeline anti-clogging early warning model is established based on big data analysis. The data from flow monitoring instruments, clogging early warning sensors, and surrounding environmental data are comprehensively analyzed to predict the risk level of pipeline clogging in advance, and the early warning information is pushed to maintenance personnel through a mobile APP.

7. A method for rapid laying of municipal drainage pipelines in rainy areas to prevent siltation, as described in claim 1, characterized in that: In step S2, during the trench excavation process, three-dimensional laser scanning technology is used to collect trench shape and size data in real time, compare it with the design data, and adjust the excavation parameters in a timely manner to ensure that the trench meets the design requirements. The three-dimensional laser scanning frequency is once every 5m of excavation.

8. A method for rapid laying of municipal drainage pipelines in rainy areas to prevent siltation, as described in claim 1, characterized in that: In step S3, the quick-install metal clamp on the outside of the pipe joint adopts an adjustable clamping force structure. By rotating the adjusting bolt, the clamping force can be finely adjusted according to the actual installation of the pipe to ensure the sealing effect of the joint. The relationship between the adjusting bolt torque and the clamping force is calibrated by test and recorded in the construction manual.

9. A method for rapid laying of municipal drainage pipelines in rainy areas to prevent siltation, as described in claim 1, characterized in that: In step S1, after the construction of the water-cutting curtain is completed, a water injection test is conducted to check its water-cutting effect. The test time is no less than 24 hours. If a leakage point is found, it is sealed by pressure grouting. The grouting material is a mixture of ultrafine cement and water glass.

10. A method for rapid laying of municipal drainage pipelines in rainy areas to prevent siltation, as described in claim 1, characterized in that: In step S4, during the backfilling process, ground-penetrating radar is used to perform non-destructive testing on the backfill quality. Testing is conducted every 10m to check the density of the backfill material and whether there are defects such as voids. Based on the test results, the compaction parameters are adjusted in a timely manner or the defective parts are reworked.