Underground sewage pipe network cleaning and dredging construction method

Abstract

The invention discloses a cleaning and dredging construction method for an underground sewage pipe network, and relates to the technical field of pipeline cleaning and dredging, and the cleaning and dredging construction method for the underground sewage pipe network comprises the following steps: dividing the underground sewage pipe network into a plurality of cleaning and dredging sections according to the position of an inspection well; the upstream cleaning and dredging section and the downstream cleaning and dredging section of one cleaning and dredging section are blocked respectively; sewage in the cleaning and dredging section is sucked and discharged; water is injected into the clearing and dredging section and stirred, so that sludge in the clearing and dredging section is diluted into slurry; slurry is sucked and discharged from the inspection well at the downstream of the cleaning and dredging section; performing high-pressure flushing on the cleaning and dredging section; ventilation and air exchange treatment is conducted on the interior of the clearing and dredging section; solid residues in the clearing and dredging section are cleared away; performing quality detection on the clearing and dredging section; and the step of blocking the cleaning and dredging section on the upstream of one cleaning and dredging section and the cleaning and dredging section on the downstream of one cleaning and dredging section is repeated till cleaning and dredging of all the cleaning and dredging sections are completed. Ventilation treatment is conducted before constructors enter the ground, safety of the constructors is guaranteed, successive cleaning is conducted in multiple cleaning and dredging modes, and the cleaning and dredging effect is good.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline clearing, and in particular to a construction method for clearing underground sewage pipe networks. Background Art

[0002] Urban underground sewage pipe networks are an important part of urban infrastructure, responsible for collecting and transporting urban domestic sewage and industrial wastewater. As time goes by and the urbanization process accelerates, underground sewage pipe networks may become blocked and damaged due to sediment accumulation, tree root invasion, etc., affecting the effective collection and treatment of sewage. Regularly clearing and maintaining underground sewage pipe networks is the key to ensuring the quality of the urban environment and the normal life of residents.

[0003] At present, underground sewage pipe networks are generally cleared by hydraulic or manual methods. When hydraulic clearing is used, the water pressure should not be too large to avoid damage to the pipes, resulting in poor clearing results. Manual clearing is time-consuming and laborious, and the underground sewage pipe network is in a semi-closed state for a long time, which is prone to produce toxic gases. There are great safety hazards for construction workers to enter the underground sewage pipe network for clearing construction. Summary of the invention

[0004] The main purpose of the present invention is to propose an underground sewage pipe network clearing construction method, aiming to solve the problems in the prior art that the underground sewage pipe network has poor clearing effect when cleared by hydraulic power, is time-consuming and labor-intensive when cleared manually, and has great safety hazards.

[0005] To achieve the above-mentioned purpose, the underground sewage pipe network clearing construction method proposed in the present invention includes the following steps: dividing the underground sewage pipe network into multiple clearing sections according to the positions of the inspection wells; respectively blocking the clearing section upstream and the clearing section downstream of a clearing section; pumping and discharging the sewage in the clearing section; injecting water into the clearing section and stirring it to dilute the silt in the clearing section into mud; pumping and discharging the mud at the inspection well downstream of the clearing section; high-pressure flushing of the clearing section; ventilation treatment of the clearing section; cleaning the solid residue in the clearing section; quality inspection of the clearing section; repeating the steps of respectively blocking the clearing section upstream and the clearing section downstream of a clearing section until all the clearing sections are cleared.

[0006] In one embodiment, the step of respectively blocking the clearing section upstream and downstream of the clearing section comprises: respectively blocking the inlet and outlet of the clearing section upstream of the clearing section; and blocking the inlet of the clearing section downstream of the clearing section.

[0007] In one embodiment, the step of respectively blocking the inlet and outlet of the clearing section located upstream of the clearing section comprises: constructing cement block walls at the inlet and outlet of the clearing section located upstream of the clearing section, and burying a temporary drainage pipe in the cement block walls; after the cement block walls are formed, blocking the temporary drainage pipe; the step of blocking the inlet of the clearing section located downstream of the clearing section comprises: setting a baffle at the inlet of the clearing section located downstream of the clearing section; using the baffle, setting a rubber airbag at the inlet of the downstream clearing section; increasing the air pressure in the rubber airbag until the inlet of the clearing section located downstream of the clearing section is blocked by the baffle and the rubber airbag together.

[0008] In one embodiment, before the step of sealing the temporary drainage pipe after the cement block wall is formed, the method further includes: setting up a temporary flow passage between the inspection well located upstream of the clearing section and the inspection well located downstream of the clearing section; and using a water pump to pump groundwater in the inspection well located upstream of the clearing section into the temporary flow passage.

[0009] In one embodiment, the step of high-pressure flushing of the clearing section includes: setting a high-pressure dredging vehicle at the inspection well upstream of the clearing section; setting a sewage suction truck at the inspection well downstream of the clearing section; high-pressure flushing of the clearing section by the high-pressure dredging vehicle, and suctioning the clearing section by the sewage suction truck.

[0010] In one embodiment, the step of ventilating the clearing section includes: setting an air supply fan at the inspection well located upstream of the clearing section; setting an air suction fan at the inspection well located downstream of the clearing section; the air supply fan supplies air into the clearing section, and the air suction fan sucks air out of the clearing section.

[0011] In one embodiment, after the step of ventilating the clearing section, the method further comprises: detecting the air quality in the clearing section.

[0012] In one embodiment, the step of cleaning the solid residue in the clearing section includes: grinding the hardened cement slurry in the clearing section by a grinding robot; cutting the tree roots in the clearing section by a chain cutter; and lifting the solid residue in the clearing section to the outside of the inspection well by the inspection well.

[0013] In one embodiment, after the step of lifting the solid residue in the clearing section to the outside of the inspection well through the inspection well, the method further comprises: repeating the step of high-pressure flushing of the clearing section until the quality inspection of the clearing section passes.

[0014] In one embodiment, the step of performing quality inspection on the clearing section includes: performing visual inspection on the inner wall of the clearing section using a crawling robot equipped with a camera; and rechecking the pollutants in the clearing section using sonar.

[0015] The underground sewage pipe network clearing construction method proposed by the present invention blocks two adjacent clearing sections upstream and downstream of a clearing section, so that the clearing section remains independent during the clearing operation and is not affected by other clearing sections that are not clearing. When clearing a clearing section, the existing sewage in the clearing section is first sucked out, and then sucked out again after injecting water to dilute the sludge, so as to clean the pollutants with smaller weight or volume in the clearing section. For solid pollutants with larger weight or volume, construction personnel enter the clearing section for cleaning. By ventilating the clearing section before the construction personnel enter the underground, harmful gases in the clearing section are removed, ensuring that the construction personnel have a good air environment when entering the clearing section, and ensuring the safety of the construction personnel. For pollutants of different weights or volumes, a variety of clearing methods are used to clean them one by one, and the cleaning is more thorough, ensuring a good clearing effect, and ensuring the long-term stable operation of the underground sewage pipe network. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0017] Figure 1 A schematic diagram of a process flow of an embodiment of an underground sewage pipe network clearing construction method provided by the present invention.

[0018] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0021] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0022] At present, underground sewage pipe networks are generally cleared by hydraulic or manual methods. When hydraulic clearing is used, the water pressure should not be too large to avoid damage to the pipes, resulting in poor clearing results. Manual clearing is time-consuming and laborious, and the underground sewage pipe network is in a semi-closed state for a long time, which is prone to produce toxic gases. There are great safety hazards for construction workers to enter the underground sewage pipe network for clearing construction.

[0023] The present invention provides a construction method for clearing underground sewage pipe networks, comprising the following steps:

[0024] S10: Dividing the underground sewage pipe network into a plurality of clearing sections according to the locations of the inspection wells;

[0025] S20: respectively blocking the upstream clearing section and the downstream clearing section of the clearing section;

[0026] S30: sucking and discharging the sewage in the clearing section;

[0027] S40: injecting water into the clearing section and stirring to dilute the sludge in the clearing section into slurry;

[0028] S50: sucking and discharging the mud at the inspection well downstream of the clearing section;

[0029] S60: performing high-pressure flushing on the clearing section;

[0030] S70: Ventilating the clearing section;

[0031] S80: cleaning the solid residue in the clearing section;

[0032] S90: Performing quality inspection on the clearing section;

[0033] S100: Repeat the steps of blocking the clearing section upstream of a clearing section and the clearing section downstream of a clearing section respectively until all the clearing sections are cleared.

[0034] See also Figure 1 When clearing the existing underground sewage pipe network in the city, the underground sewage pipe network section between two adjacent inspection wells is divided into a clearing section according to the location of the inspection wells of the existing underground sewage pipe network, and the two adjacent clearing sections share one inspection well. When clearing a clearing section, firstly, the clearing section located upstream and adjacent to the clearing section is blocked, and the clearing section located downstream and adjacent to the clearing section is blocked, so that the clearing section is no longer affected by the groundwater in the upstream and downstream clearing sections. At this time, the sewage in the clearing section is sucked and discharged to the outside of the underground sewage pipe network. Due to the high sludge content in the sewage, a large amount of sludge is precipitated at the bottom of the clearing section. The sludge is diluted into slurry by injecting clean water, so that the precipitated sludge is sucked out of the underground sewage pipe network together with the slurry. Then the clearing section is high-pressure flushed, and the mud and dirt remaining on the inner wall of the clearing section are washed away by the high-pressure flushing force, and discharged out of the clearing section with the water flow. The above steps can all be completed by automatic cleaning machinery, and construction workers do not need to enter the cleaning section. However, for solid residues with large weight or volume in the cleaning section, construction workers are required to enter the cleaning section to operate. Before construction workers enter the cleaning section, the cleaning section should be ventilated to remove harmful gases in the underground sewage pipe network to ensure the safety of construction workers; when construction workers enter the cleaning section to perform cleaning operations, ventilation should be maintained to ensure that there is a good air environment in the cleaning section. Finally, after the fixed residues are removed, the cleaning section is quality inspected to ensure that the cleaning quality meets the standards, and then the cleaning work of the next cleaning section is carried out in sequence.

[0035] The underground sewage pipe network clearing construction method proposed by the present invention blocks two adjacent clearing sections upstream and downstream of a clearing section, so that the clearing section remains independent and stable during the clearing operation and is not affected by other clearing sections that are not clearing. When clearing a clearing section, the existing sewage in the clearing section is first sucked out, and then sucked out again after injecting water to dilute the sludge, so as to clean the pollutants with smaller weight or volume in the clearing section. For solid pollutants with larger weight or volume, construction personnel enter the clearing section for cleaning. By ventilating the clearing section before the construction personnel enter the underground, harmful gases in the clearing section are removed, ensuring that the construction personnel have a good air environment when entering the clearing section, and ensuring the safety of the construction personnel. For pollutants of different weights or volumes, a variety of clearing methods are used to clean them one by one, and the cleaning is more thorough, ensuring a good clearing effect, and ensuring the long-term stable operation of the underground sewage pipe network.

[0036] In one embodiment, step S20 includes:

[0037] S21: respectively blocking the inlet and outlet of the clearing section located upstream of the clearing section;

[0038] S22: blocking the inlet of the clearing section downstream of the clearing section.

[0039] It should be noted that before the cleaning construction of a cleaning section is carried out, the cleaning section located upstream of the cleaning section is blocked first. After the sewage in the cleaning section flows into the downstream cleaning section, the cleaning section located downstream of the cleaning section is blocked to cut off the cleaning section from the underground sewage pipe network. The cleaning section located upstream of the cleaning section includes an inlet and an outlet according to the flow direction of sewage, and the outlet of the cleaning section located upstream and the inlet of the cleaning section share the same inspection well. By blocking the inlet and outlet of the cleaning section located upstream, the cleaning section located upstream is used as a buffer section to prevent sewage in the underground sewage pipe network from entering the cleaning section under cleaning construction, thereby ensuring the tightness of the blocking. Similarly, the inlet of the cleaning section located downstream and the outlet of the cleaning section share the same inspection well. By blocking the inlet of the cleaning section located downstream, the sewage in the downstream cleaning section is prevented from flowing back, ensuring that the operating environment in the cleaning section is closed and controllable, which is convenient for subsequent cleaning construction.

[0040] In one embodiment, step S21 includes:

[0041] S211: construct cement block walls at the inlet and outlet of the clearing section upstream of the clearing section, and bury temporary drainage pipes in the cement block walls;

[0042] S212: After the cement block wall is formed, the temporary drainage pipe is blocked;

[0043] Step S22 includes:

[0044] S221: Setting a baffle at the inlet of the clearing section downstream of the clearing section;

[0045] S222: using the baffle, setting a rubber airbag at the inlet of the downstream clearing section;

[0046] S223: increasing the air pressure in the rubber airbag until the inlet of the clearing section located downstream of the clearing section is blocked by the baffle and the rubber airbag together.

[0047] Furthermore, since the upstream clearing section has a greater impact on the water flow of the downstream clearing section, cement block walls are used as the blocking structure when blocking the inlet and outlet of the clearing section located upstream of the clearing section. The cement block wall structure is more stable and can withstand greater water flow impact, ensuring the reliability of the blocking. A temporary drainage pipe is set during the cement block wall molding process. During the cement block wall molding process, sewage is allowed to flow, and the cement block wall does not bear the impact load, ensuring the smooth progress of the construction. After the cement block wall is formed, the temporary drainage pipe is blocked to ensure that the inlet and outlet of the upstream clearing section are tightly blocked. After the upstream clearing section is blocked, the clearing section has less impact on the water flow of the downstream clearing section. A rubber airbag is used in combination with a baffle as the blocking structure. The rubber airbag is simple to operate and fast to construct. It can adapt to pipes of different shapes and sizes and effectively improve the tightness of the blocking.

[0048] In one embodiment, before step S212, the underground sewage pipe network clearing construction method proposed by the present invention further includes the following steps:

[0049] S2118: Setting up a temporary flow passage between the inspection well located upstream of the clearing section and the inspection well located downstream of the clearing section;

[0050] S2119: Use a water pump to pump the groundwater in the inspection well located upstream of the clearing section into the temporary flow channel.

[0051] What needs to be explained and illustrated is that before the upstream clearing section is tightly sealed, a temporary flow passage is set up between the inspection well at the entrance of the upstream clearing section and the inspection well at the exit of the downstream clearing section. The temporary flow passage is formed through the ground, so that the upstream clearing section and the downstream clearing section are cut off from the underground sewage pipe network, and serve as a buffer for the clearing section, further ensuring that the clearing section has a stable construction environment. Since the temporary flow passage is set up on the ground, the sewage located upstream is pumped into the temporary flow passage by a water pump, preventing the sewage in the inspection well at the entrance of the upstream clearing section from gathering and exerting excessive water pressure on the plugging structure of the entrance of the upstream clearing section, ensuring the stability of the plugging structure, and ensuring the smooth flow of sewage, and the clearing construction does not affect the normal operation of the underground sewage pipe network.

[0052] In one embodiment, step S60 includes:

[0053] S61: installing a high-pressure dredging vehicle at the inspection well located upstream of the clearing section;

[0054] S62: Arrange a sewage suction truck at the inspection well located downstream of the clearing section;

[0055] S63: The high-pressure dredging vehicle is used to perform high-pressure flushing on the dredging section, and the sewage suction vehicle is used to perform suction on the dredging section.

[0056] It can be understood that by setting up a high-pressure dredging vehicle in the upstream inspection well of the clearing section and a sewage suction truck in the downstream inspection well, the high-pressure water flow generated by the high-pressure dredging vehicle is used to flush the clearing section to remove stubborn dirt and sediment on the inner wall of the pipeline. The high-pressure dredging vehicle can provide a strong water flow to effectively peel off and flush away the blockages in the pipeline; the sewage and debris generated after high-pressure flushing are sucked out of the clearing section by the sewage suction truck to keep the pipeline unobstructed. The sewage suction truck has a strong suction force and can quickly remove liquid and solid waste in the pipeline. The combined operation of high-pressure flushing and sewage suction can quickly remove stubborn dirt in the pipeline, effectively improve the clearing effect, ensure the cleanliness of the pipeline, and the mechanized operation reduces the time personnel are exposed to harmful environments and dangerous conditions, improves the safety of the operation, and improves the efficiency of the clearing operation.

[0057] In one embodiment, step S70 includes:

[0058] S71: installing a blower at the inspection well located upstream of the clearing section;

[0059] S72: installing a suction fan at the inspection well located downstream of the clearing section;

[0060] S73: The air supply fan supplies air into the clearing section, and the suction fan sucks air out of the clearing section.

[0061] It can be understood that by installing a supply fan in the upstream inspection well of the clearing section and a suction fan in the downstream inspection well, the supply fan is used to transport fresh air to the clearing section to increase the oxygen content in the pipeline, ensuring that construction personnel have sufficient oxygen supply before entering the pipeline and during construction, while helping to discharge harmful gases in the pipeline, and using a suction fan to extract air from the clearing section to promote air flow, accelerate the discharge of harmful gases, and help maintain the ventilation state in the pipeline, ensuring that there is sufficient oxygen supply in the pipeline and timely discharge of harmful gases, which greatly reduces the safety risks of construction personnel when working in the pipeline.

[0062] In one embodiment, after step S70, the underground sewage pipe network clearing construction method provided by the present invention further includes the following steps:

[0063] S701: Perform air quality detection in the clearing section. It is understandable that after the ventilation treatment is completed, the oxygen, toxic gases, etc. in the clearing section are detected by gas detection equipment to ensure that the air environment in the clearing section is suitable for construction workers to work and ensure the construction safety of construction workers.

[0064] In one embodiment, step S80 includes:

[0065] S81: grinding the hardened cement slurry in the clearing section by a grinding robot;

[0066] S82: cutting the tree roots in the clearing section by a chain cutter;

[0067] S83: The solid residue in the clearing section is lifted from the inspection well to the outside of the inspection well.

[0068] It should be noted that high-pressure flushing in the clearing section is suitable for pollutants with smaller weight or volume, while for solid residues of cement slurry with larger weight or volume, which are tightly adhered to the inner wall of the clearing section pipeline and have been hardened, grinding robots are used to grind the hardened cement slurry in the clearing section, and chain cutters are used to cut the tree roots in the clearing section to reduce the volume of hardened cement slurry and tree roots, so that the solid residues can be hoisted outside the clearing section through the inspection well, and the solid residues in the pipeline can be more thoroughly removed to improve the quality of clearing. Using automated equipment for grinding and cutting can greatly increase the speed of clearing operations and reduce the time and labor intensity of manual operations.

[0069] In one embodiment, after step S83, the underground sewage pipe network clearing construction method proposed by the present invention further includes:

[0070] S84: Repeat the step of high-pressure flushing of the clearing section until the quality inspection of the clearing section passes.

[0071] It can be understood that after the solid residue is cleaned, high-pressure flushing, ventilation treatment and further inspection and cleaning of solid residue are repeated until the quality inspection of the cleared section is qualified, thereby further improving the clearing effect and ensuring the thoroughness of the clearing work and the cleanliness of the pipeline.

[0072] In one embodiment, step S90 includes:

[0073] S91: using a crawling robot equipped with a camera to perform visual inspection on the inner wall of the clearing section;

[0074] S92: Using sonar to review the pollutants in the clearing section.

[0075] It can be explained that by obtaining images of the inner wall of the clearing section through a high-resolution camera, construction personnel can intuitively understand the clearing conditions of the inner wall of the clearing section, including dirt, cracks, corrosion, sediments, etc., which is convenient for judging the clearing quality and providing data support for subsequent maintenance and management. Sonar is also used to review the pollutants in the clearing section. By emitting sound waves and analyzing the echoes, the type, location and quantity of pollutants in the pipeline can be accurately determined, and the conditions in the pipeline can be more comprehensively and accurately evaluated to ensure a good clearing effect.

[0076] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A construction method for clearing underground sewage pipe network, characterized in that: Includes steps: Dividing the underground sewage pipe network into a plurality of clearing sections according to the locations of the inspection wells; respectively blocking the clearing section upstream of the clearing section and the clearing section downstream of the clearing section; Suctioning and discharging the sewage in the clearing section; injecting water into the clearing section and stirring to dilute the sludge in the clearing section into slurry; Sucking and discharging the mud at the inspection well downstream of the clearing section; Performing high-pressure flushing on the clearing section; Performing ventilation treatment in the clearing section; Cleaning the solid residues in the clearing section; Performing quality inspection on the clearing section; Repeat the steps of blocking the clearing section upstream of a clearing section and the clearing section downstream of a clearing section respectively until all the clearing sections are cleared.

2. The underground sewage pipe network clearing construction method according to claim 1, characterized in that: The step of respectively blocking the upstream clearing section and the downstream clearing section of the clearing section comprises: The inlet and outlet of the clearing section located upstream of the clearing section are blocked respectively; The inlet of the clearing section located downstream of the clearing section is blocked.

3. The underground sewage pipe network clearing construction method according to claim 2, characterized in that: The step of respectively blocking the inlet and outlet of the clearing section located upstream of the clearing section comprises: Concrete block walls are constructed at the inlet and outlet of the clearing section located upstream of the clearing section, and temporary drainage pipes are buried in the cement block walls; After the cement block wall is formed, the temporary drainage pipe is blocked; The step of blocking the inlet of the clearing section located downstream of the clearing section comprises: A baffle is provided at the inlet of the clearing section located downstream of the clearing section; Using the baffle, a rubber air bag is arranged at the inlet of the downstream clearing section; The air pressure in the rubber airbag is increased until the inlet of the clearing section located downstream of the clearing section is blocked by the baffle and the rubber airbag together.

4. The underground sewage pipe network clearing construction method according to claim 3, characterized in that: Before the step of blocking the temporary drainage pipe after the cement block wall is formed, the method further comprises: A temporary flow passage is set up between the inspection well located upstream of the clearing section and the inspection well located downstream of the clearing section; The groundwater in the inspection well upstream of the clearing section is pumped into the temporary flow passage by means of a water pump.

5. The underground sewage pipe network clearing construction method according to claim 1, characterized in that: The step of high-pressure flushing of the clearing section comprises: A high-pressure dredging vehicle is provided at the inspection well located upstream of the clearing section; A sewage suction truck is arranged at the inspection well located downstream of the clearing section; The high-pressure dredging vehicle is used to perform high-pressure flushing on the clearing section, and the sewage suction vehicle is used to perform suction on the clearing section.

6. The underground sewage pipe network clearing construction method according to any one of claims 1 to 5, characterized in that: The step of performing ventilation treatment in the clearing section comprises: A blower is provided at the inspection well located upstream of the clearing section; A suction fan is provided at the inspection well located downstream of the clearing section; The air supply fan supplies air into the clearing section, and the suction fan sucks air out of the clearing section.

7. The underground sewage pipe network clearing construction method according to any one of claims 1 to 5, characterized in that: After the step of performing ventilation treatment on the clearing section, the method further comprises: Air quality detection is performed in the clearing section.

8. The underground sewage pipe network clearing construction method according to any one of claims 1 to 5, characterized in that: The step of cleaning the solid residue in the clearing section comprises: Grinding the hardened cement slurry in the clearing section by a grinding robot; Cutting the tree roots in the clearing section by a chain cutter; The solid residue in the clearing section is lifted and transported to the outside of the inspection well by the inspection well.

9. The underground sewage pipe network clearing construction method according to claim 8, characterized in that: After the step of lifting the solid residue in the clearing section to outside the inspection well through the inspection well, the method further comprises: Repeat the step of high-pressure flushing of the clearing section until the quality inspection of the clearing section passes.

10. The underground sewage pipe network clearing construction method according to any one of claims 1 to 5, characterized in that: The step of performing quality inspection on the clearing section comprises: Using a crawling robot equipped with a camera to visually inspect the inner wall of the clearing section; The pollutants in the clearing section are reviewed using sonar.

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