阅读说明：本技术 排水管网改扩建局部树脂固化施工工艺 (Local resin curing construction process for reconstruction and expansion of drainage pipe network ) 是由 李景 黄玉萍 王新妍 洪涛 张永 范博毅 于 2019-10-31 设计创作，主要内容包括：本发明公开了一种排水管网改扩建局部树脂固化施工工艺,包括以下步骤：前期排查、申请占道、封堵方法采用气囊封堵法或墙体封堵法、导流、管道清疏、CCTV检测、管道预处理、局部树脂固化修复及CCTV检测,将毡筒用树脂浸透,将上述毡筒缠绕于气囊上,在CCTV引导下到达修复的地点,向气囊充气使毡筒″补丁″被压覆在管道上,保持压力待树脂固化,气囊泄压缩小并拉出管道,最后进行CCTV检测,进行施工质量检测；清理现场。本发明施工简单快捷,同时缩短了施工工期,增加了管道强度,达到了修复目的,并可保护环境,节省资源,不开挖路面,不产生垃圾,不堵塞交通,使管道修复施工的形象大为改观。(The invention discloses a local resin curing construction process for reconstruction and extension of a drainage pipe network, which comprises the following steps: the method comprises the steps of carrying out early-stage investigation, applying for lane occupation and plugging by adopting an air bag plugging method or a wall plugging method, guiding flow, clearing and dredging a pipeline, carrying out CCTV detection, preprocessing the pipeline, curing and repairing local resin and carrying out CCTV detection, soaking a felt cylinder with resin, winding the felt cylinder on an air bag, reaching a repairing place under the guidance of CCTV, inflating the air bag to press a felt cylinder patch on the pipeline, keeping pressure for curing the resin, reducing the pressure of the air bag and pulling out the pipeline, and finally carrying out CCTV detection and carrying out construction quality detection; and (5) cleaning the site. The invention has simple and rapid construction, shortens the construction period, increases the pipeline strength, achieves the aim of repairing, protects the environment, saves resources, does not dig the road surface, generates garbage, does not block the traffic and greatly improves the image of pipeline repairing construction.)

1. A partial resin curing construction process for reconstruction and expansion of a drainage pipe network is characterized by comprising the following steps:

(1) early-stage investigation: CCTV detection or QV detection is carried out on the data which are not checked in the early stage, the defects of the pipe section are judged, and in addition, CCTV is used for detecting and rechecking the internal condition of the pipeline before repair;

(2) application accounts for the way: according to the design drawing and the site reconnaissance result, reporting the corresponding occupied road and the structures to be dismantled to the supervision and construction unit;

(3) plugging: in the pipe section repairing construction, safe blocking is carried out on the pipeline, and an air bag blocking method or a wall body blocking method is adopted as a blocking method;

(4) flow guiding: carrying out toxic gas detection on the diversion well before diversion construction, taking each 60-100m pipe section as a restoration unit, arranging a water pump for lifting in the inspection well, crossing a restoration point position by adopting a temporary drainage pipeline, entering the next section of pipeline, and entering the next section of pipeline for construction after finishing restoration of each section, wherein a well point precipitation method is adopted for the high underground water level;

(5) pipeline dredging and CCTV detection: the method comprises the following steps that a pipeline is removed from a downstream well for construction, an injection nozzle is inserted to penetrate or cross the blockage, then the blockage material is removed by the force of a spraying machine along with the pulling back of a hose, two standards of construction from the downstream working well or construction from an upstream manhole are formulated according to the working direction of an operator and the selection of a nozzle, then the pipeline is cleaned, and CCTV detection is carried out on a pipe section after the pipeline is cleaned;

(6) pipeline pretreatment: adopting a manual or robot milling cutter system to remove foreign matters in the pipeline, and adopting manual dragging or mechanical pipe entering to remove obstacles in the pipeline;

(7) local resin curing repair and CCTV detection: soaking a felt cylinder with resin, winding the felt cylinder on an air bag, reaching a repair place under CCTV guidance, inflating the air bag to press a felt cylinder patch on a pipeline, keeping pressure until the resin is cured, reducing the pressure of the air bag and pulling out the pipeline, and finally carrying out CCTV detection and construction quality detection;

(8) cleaning the site: and (4) removing the plug, and removing the used construction equipment, waste materials, construction wastes and temporary facilities out of the construction site after the repair is finished.

2. The drainage pipe network rebuilding and expanding local resin curing construction process according to claim 1, characterized in that: the air bag plugging method in the step (3) is specifically that rubber air bags are plugged at the upstream and the downstream of the cleaning area section, a water inlet source is cut off, the corresponding water level is controlled, the lower rubber air bag is respectively plugged at the upper opening and the lower opening of the wellhead at the upstream and the downstream of the cleaning pipe section, and stainless steel baffle walls are additionally arranged at the two sides of the construction pipe section to support the plugged air bags.

3. The drainage pipe network rebuilding and expanding local resin curing construction process according to claim 1, characterized in that: the wall body plugging method in the step (3) is specifically that building blocks are adopted for plugging a large pipeline, the wall body thickness of the plugged pipeline is set according to the maximum thrust, one to two short pipes for temporary drainage and upstream water level reduction are embedded in advance during wall building, the reserved pipe is sealed after the wall body reaches the use strength, and similarly, the plugging in the reserved pipe is removed firstly when the wall body is dismantled, the water level is reduced, and then the wall body is dismantled manually.

4. The drainage pipe network rebuilding and expanding local resin curing construction process according to claim 3, characterized in that: the wall material for plugging is common brick and building block.

5. The drainage pipe network rebuilding and expanding local resin curing construction process according to claim 1, characterized in that: specifically, in the step (5), the construction from the downstream working well comprises the steps of placing a hose and an injection nozzle into the downstream manhole, selecting a nozzle of a reverse spraying machine, inserting the nozzle and the hose into the front surface of the plugging part, starting a high-pressure pump, dredging through a backward working mode of the nozzle, keeping the nozzle in a moving state all the time, keeping a playback rate of 100 plus 200mm/s when the nozzle penetrates through a blockage, pulling fragments generated in the injection operation process to the direction of the manipulator through the hose and the head, periodically washing the fragments from the sewage pipeline, and keeping water pressure.

6. The drainage pipe network rebuilding and expanding local resin curing construction process according to claim 1, characterized in that: and (5) selecting a nozzle with a backward and forward type spraying machine from the upstream manhole construction, inserting the nozzle and a hose into the front surface of the plugging part, starting the high-pressure pump, keeping the nozzle in a moving state all the time when the nozzle works, and clearing through a backward and forward type working mode of the nozzle.

7. The drainage pipe network rebuilding and expanding local resin curing construction process according to claim 1, characterized in that: and (5) cleaning the pipeline by adopting high-pressure cleaning, specifically, starting construction from a downstream wellhead, placing a nozzle and a hose into the pipeline, before opening a pump, placing a spray head at the tail end of the pipeline, using a reflection nozzle spray head to ensure that the spray head is in a motion state, controlling the water flow in the pipeline when the spray head is below the water surface, sending the spray head into the pipeline to be cleaned, washing impurities in the pipeline into a downstream working well in a pulling process, removing the impurities, controlling the reversing speed to be 100 and 200mm/s, pumping the cleaned mixture in the inspection well by using a sewage suction truck or a slurry pump while cleaning the pipeline at high pressure, and loading the cleaned sludge and garbage into a woven bag and transporting to a designated place.

8. The drainage pipe network rebuilding and expanding local resin curing construction process according to claim 1, wherein the local resin curing and repairing in the step (7) comprises the following specific steps:

firstly, cutting a felt cylinder: according to the condition of repairing the pipeline, cutting a certain size of glass fiber felt cloth on a waterproof closed room or a construction vehicle on site, wherein the cutting length is 3.5 times of the diameter of the air bag, and the cutting width is at least 10cm before and after the glass fiber felt cloth exceeds the defect of the pipeline;

secondly, mixing a resin curing agent: preparing a certain amount of mixed liquid of resin and a curing agent according to the condition of repairing the pipeline, and uniformly mixing the mixed liquid by using a stirring device to obtain mixed liquid of the resin;

again resin impregnation: uniformly coating the resin mixed solution on glass fiber felt cloth by using a proper spatula, enabling the thickness of the felt cloth to reach a designed value by folding, and pressing the resin into the felt cloth by using a roller;

finally, positioning and mounting the felt cylinder: the felt tube soaked by resin penetrates through the air bag to be installed, the air bag is bundled by using a polyethylene protective film, the felt tube is bundled on the air bag, the air bag is connected with an air tube when being sent into a repair pipe section, the air bag is pressurized by using an air compressor after being in place to expand the air bag, the felt tube is tightly attached to the pipe wall, the pressure of the air bag is released and is pulled out of the pipeline, the curing time and the curing pressure are recorded, and the curing time of the resin is 2-4 hours.

9. The drainage pipe network rebuilding and expanding local resin curing construction process according to claim 8, characterized in that: the resin is polyester resin, epoxy resin or vinyl resin, and the curing agent is a cobalt-containing compound or organic peroxide.

Technical Field

The invention relates to the technical field of drainage pipe network construction, in particular to a local resin curing construction process for reconstruction and extension of a drainage pipe network.

Background

With the acceleration of urban modernization process, drainage pipe networks are used as important municipal facilities and play an important role in urban "blood vessels". However, at the beginning of urban construction, a pipe network is not planned, the problems of end breakage, rain and sewage mixed connection and the like exist, and structural defects of pipeline aging, cracking, leakage, deformation and the like and functional defects of tree roots, clogging and the like begin to appear in some pipelines along with the passage of time. Causes the problems of urban inland inundation, river pollution and the like, and influences the life of people and the environmental problems. Therefore, the work of rebuilding and expanding municipal drainage networks is urgent. The traditional reconstruction and expansion process has the problems of long construction period, large influence on the environment and the like. Therefore, the adoption of reconstruction and expansion processes which have small influence on the life of residents, are environment-friendly and rapid is a great trend. In addition, in recent years, due to the reasons of imperfect construction of underground drainage pipe network systems, insufficient system management experience and the like, urban flood and waterlogging accidents in China frequently occur, water is accumulated in urban areas for a long time, roads are blocked, and traffic order is disordered, so that the daily travel safety of people is seriously influenced. Therefore, the drainage pipe network needs to be rebuilt and expanded.

Disclosure of Invention

The invention aims to provide a local resin curing construction process for rebuilding and expanding a drainage pipe network, which is simple and rapid in construction, shortens the construction period, increases the pipeline strength, achieves the aim of repairing, protects the environment, saves resources, does not dig a road surface, does not generate garbage, does not block traffic, and greatly improves the image of pipeline repairing construction.

In order to achieve the aim, the invention provides a partial resin curing construction process for rebuilding and expanding a drainage pipe network, which comprises the following steps:

(1) early-stage investigation: CCTV detection or QV detection is carried out on the data which are not checked in the early stage, the defects of the pipe section are judged, and in addition, CCTV is used for detecting and rechecking the internal condition of the pipeline before repair;

(2) application accounts for the way: according to the design drawing and the site reconnaissance result, reporting the corresponding occupied road and the structures to be dismantled to the supervision and construction unit;

(3) plugging: in the pipe section repairing construction, safe blocking is carried out on the pipeline, and an air bag blocking method or a wall body blocking method is adopted as a blocking method;

(4) flow guiding: carrying out toxic gas detection on the diversion well before diversion construction, taking each 60-100m pipe section as a restoration unit, arranging a water pump for lifting in the inspection well, crossing a restoration point position by adopting a temporary drainage pipeline, entering the next section of pipeline, and entering the next section of pipeline for construction after finishing restoration of each section, wherein a well point precipitation method is adopted for the high underground water level;

(5) pipeline dredging and CCTV detection: the method comprises the following steps that a pipeline is removed from a downstream well for construction, an injection nozzle is inserted to penetrate or cross the blockage, then the blockage material is removed by the force of a spraying machine along with the pulling back of a hose, two standards of construction from the downstream working well or construction from an upstream manhole are formulated according to the working direction of an operator and the selection of a nozzle, then the pipeline is cleaned, and CCTV detection is carried out on a pipe section after the pipeline is cleaned;

(6) pipeline pretreatment: adopting a manual or robot milling cutter system to remove foreign matters in the pipeline, and adopting manual dragging or mechanical pipe entering to remove obstacles in the pipeline;

(7) local resin curing repair and CCTV detection: soaking a felt cylinder with resin, winding the felt cylinder on an air bag, reaching a repair place under CCTV guidance, inflating the air bag to press a felt cylinder patch on a pipeline, keeping pressure until the resin is cured, reducing the pressure of the air bag and pulling out the pipeline, and finally carrying out CCTV detection and construction quality detection;

(8) cleaning the site: and (4) removing the plug, and removing the used construction equipment, waste materials, construction wastes and temporary facilities out of the construction site after the repair is finished.

Preferably, the air bag plugging method in the step (3) is specifically to plug the rubber air bags at the upstream and the downstream of the cleaning area section, cut off a water inlet source, control the corresponding water level, plug 1 air bag at the upper opening and the lower opening of the wellhead of the upstream and the downstream of the cleaning pipe section respectively at the position of the lower rubber air bag, and add stainless steel baffle walls at the two sides of the construction pipe section to support the plugged air bags.

Preferably, the wall plugging method in the step (3) is specifically to plug the large pipeline by using building blocks, the wall thickness of the plugged pipeline is set according to the maximum thrust, one to two short pipes for temporary drainage and upstream water level reduction are embedded in advance during wall building, the reserved pipe is sealed after the wall reaches the use strength, and similarly, when the wall is dismantled, the plugs in the reserved pipe are firstly removed, the water level is reduced, and then the wall is dismantled manually.

Preferably, the wall material for plugging is common bricks and building blocks.

Preferably, the construction from the downstream working well in the step (5) is specifically to put a hose and an injection nozzle into the downstream manhole, select to use a nozzle of a reverse type spraying machine, insert the nozzle and the hose into the front of the plugging part, start a high-pressure pump, clean and dredge through a backward working mode of the nozzle, keep the nozzle in a moving state all the time, keep a playback rate of 100 and 200mm/s when the nozzle passes through a blockage, and periodically wash away fragments generated in the injection operation from a sewage pipeline by pulling the hose and the head part towards the manipulator direction, and simultaneously keep water pressure.

Preferably, the construction of the manhole from the upstream in the step (5) is specifically to select a nozzle with a backward and forward spraying machine, insert the nozzle and a hose into the front of the plugging part, start the high-pressure pump, keep the nozzle in a moving state when the nozzle works, and clean and dredge through a backward and forward working mode of the nozzle.

Preferably, the pipeline is cleaned in the step (5) by high-pressure cleaning, specifically, construction is started from a downstream wellhead, a nozzle and a hose are placed into the pipeline, before a pump is started, a spray head is placed at the tail end of the pipeline, a reflection nozzle spray head is used for ensuring that the spray head is in a motion state, when the spray head is below the water surface, water flow in the pipeline needs to be controlled, the spray head is conveyed into the pipeline to be cleaned, then impurities in the pipeline are washed into a downstream working well in the pulling-back process, the impurities are removed, the reversing speed is controlled at 200mm/s, in addition, when the pipeline is cleaned under high pressure, a mixture cleaned in an inspection well is pumped by a sewage suction truck or a mud pump, and the cleaned sludge and garbage are filled into a woven bag and conveyed to a designated place.

Preferably, the partial resin curing repair in the step (7) specifically comprises the following steps:

firstly, cutting a felt cylinder: according to the condition of repairing the pipeline, cutting a certain size of glass fiber felt cloth on a waterproof closed room or a construction vehicle on site, wherein the cutting length is 3.5 times of the diameter of the air bag, and the cutting width is at least 10cm before and after the glass fiber felt cloth exceeds the defect of the pipeline;

secondly, mixing a resin curing agent: preparing a certain amount of mixed liquid of resin and a curing agent according to the condition of repairing the pipeline, and uniformly mixing the mixed liquid by using a stirring device to obtain mixed liquid of the resin;

again resin impregnation: uniformly coating the resin mixed solution on glass fiber felt cloth by using a proper spatula, enabling the thickness of the felt cloth to reach a designed value by folding, and pressing the resin into the felt cloth by using a roller;

finally, positioning and mounting the felt cylinder: the felt tube soaked by resin penetrates through the air bag to be installed, the air bag is bundled by using a polyethylene protective film, the felt tube is bundled on the air bag, the air bag is connected with an air tube when being sent into a repair pipe section, the air bag is pressurized by using an air compressor after being in place to expand the air bag, the felt tube is tightly attached to the pipe wall, the pressure of the air bag is released and is pulled out of the pipeline, the curing time and the curing pressure are recorded, and the curing time of the resin is 2-4 hours.

Preferably, the resin is polyester resin, epoxy resin or vinyl resin, and the curing agent is a cobalt-containing compound or an organic peroxide.

Therefore, the drainage pipe network reconstruction and expansion local resin curing construction process adopting the steps is simple and quick in construction, shortens the construction period, increases the pipeline strength, achieves the aim of repairing, protects the environment, saves resources, does not dig the road surface, does not generate garbage, does not block traffic, and greatly improves the image of pipeline repairing construction.

The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.

Drawings

Fig. 1 is a flow chart of an embodiment of a partial resin curing construction process for reconstruction and extension of a drainage pipe network according to the present invention.

Detailed Description