Construction method for pipe connection of water containing structure without cutting off water

Abstract

The invention discloses a construction method of a water-containing structure pipe connecting without cutting off water, and particularly relates to the field of water treatment.The construction method comprises the following steps that S1, the pipe diameter and the position of a connecting pipe needing to be connected into the water-containing structure are determined; s2, determining the size and the position of a well chamber according to the pipe diameter and the position of the connecting pipe; s3, the well chamber is newly built by planting steel bars on the pool wall of the current water containing structure, so that the well chamber and the current water containing structure are integrated; s4, the outer wall base layer of the well chamber is free of floating ash and greasy dirt, and the water content is smaller than or equal to 8%; s5, a waterproof wing ring sleeve is pre-buried; s6, installing a pipeline; and S7, forming a hole in the pool wall between the current water containing structure and the well chamber to obtain a pool wall hole which is a rectangular hole. The method can reduce the adverse effect on operation caused by water-cut-off construction of water containing structures such as sewage treatment plants and water supply plants, and meanwhile, the safety of constructors is guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of water treatment, and more specifically, to a construction method for connecting pipes without stopping the water supply in a water storage structure. Background Art

[0002] When upgrading and expanding sewage treatment plants, water supply plants, etc., it may involve opening holes and connecting pipes in water storage structures. Currently, there are two common methods. One is to empty the structure, open a hole in the pool wall of the structure, and install a casing and a pipe. The disadvantage of this method is that the water treatment structure needs to stop production, affecting the normal operation of the water plant, and due to the need to set up a waterproof casing at the pipe connection, the opening is relatively large. The other is to set up a cofferdam at the location where the hole needs to be opened, pump out the water inside the cofferdam, and then open the hole and connect the pipe. The disadvantage of this method is that a cofferdam needs to be fabricated, involving the hoisting of the cofferdam and multiple water pumping operations, and the process is cumbersome.

[0003] To solve the above problems, a technical solution is provided herein. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a construction method for connecting pipes without stopping the water supply in a water storage structure to solve the problems raised in the above background art.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A construction method for connecting pipes without stopping the water supply in a water storage structure includes the following steps:

[0007] Step S1, determining the pipe diameter and position of the connecting pipe that needs to be connected to the water storage structure;

[0008] Step S2, determining the size and position of the well chamber according to the pipe diameter and position of the connecting pipe;

[0009] Step S3, newly constructing the well chamber by planting steel bars on the pool wall of the existing water storage structure, so that the well chamber and the existing water storage structure become an integral body;

[0010] Step S4, the outer wall base layer of the well chamber should be free of floating ash and oil stains, and the moisture content ≤ 8%;

[0011] Step S5, pre-embedding a waterproof wing ring casing;

[0012] Step S6, installing the pipe;

[0013] Step S7, opening a hole in the pool wall between the existing water storage structure and the well chamber to obtain a pool wall opening, which is a rectangular hole.

[0014] In a preferred embodiment, in step S1, the elevation of the connecting pipe is considered in combination with the local frost requirements and the elevation of the existing pool bottom.

[0015] In a preferred embodiment, in step S2, the bottom of the well chamber is 300 mm lower than the bottom of the pipe. The width of the well chamber leaves 300 mm on each side based on the pipe diameter, and the top of the well chamber is flush with the existing water storage structure.

[0016] In a preferred embodiment, in step S3, the spacing of the planted bars is controlled within 100 mm - 200 mm. The depth of the planted bars is determined according to the force and is not less than 100 mm. A-level or B-level adhesive is selected for the planted bars. The depth of the hole formed for planting the bars is 10 mm longer than the calculated hole depth, and the diameter of the formed hole is 4 - 8 mm larger than the diameter of the steel bar. After the hole is formed, the debris in the hole is cleaned, then the bars are planted, and finally a pull-out test is carried out.

[0017] In a preferred embodiment, in step S4, the uneven parts of the outer wall base of the well chamber are repaired with cement mortar, and the inner and outer corners are plastered into an arc with a radius of ≥50 mm. The base treatment agent is evenly applied, and the drying time is 6 - 8 hours. An additional layer is pre-laid at the inner and outer corners, and then a 3 mm SBS waterproof coiled material is laid. The coiled material is laid flat, and the lap width is not less than 100 mm to ensure the waterproof effect.

[0018] In a preferred embodiment, in step S5, when constructing the well chamber, a casing with an outer diameter of 500 mm is embedded. The casing is a waterproof wing-ring casing, the wall thickness of the casing is 8 mm, the thickness of the wing ring is 10 mm, and the material is Q235 steel.

[0019] In a preferred embodiment, in step S5, the casing is cast together with the well chamber concrete. The wing ring is firmly welded to the casing. The surface of the casing in contact with the concrete is not anti-corrosively treated after rust removal, and there shall be no oil stains and debris on the surface. The surfaces in contact with water and air shall be taken anti-corrosion measures. For the surface in contact with water, a non-toxic anti-corrosion epoxy coating is used, and the dry film thickness of the coating is not less than 300 μm. For other surfaces, one coat of red lead primer and two coats of finishing paint are applied.

[0020] In a preferred embodiment, in step S6, the opening area is equivalent to the pipe diameter area, and the top of the hole can be below the water surface. The position and size of the opening are determined according to the drawing. Drilling method, impact method and cutting method are used for opening holes in the pool wall. After the opening is completed, the periphery of the hole is trimmed to ensure that the edge of the hole is neat and smooth.

[0021] The technical effects and advantages of the construction method for connecting pipes without stopping water in a water storage structure of the present invention:

[0022] 1. Through the method of the present invention, the pipe connection operation can be completed without interrupting the water supply, avoiding the inconvenience and losses brought to users by water cut-off construction. In the urban water supply system, this feature is particularly important and can ensure that the normal water use needs of residents and enterprises are not affected;

[0023] 2. The new well chamber is built by planting reinforcement on the outer wall of the existing water-holding structure pool, which is integrated with the structure to ensure the integrity and stability of the structure. At the same time, waterproof wing ring sleeves are used at the connection between the well chamber and the pipeline to effectively prevent water from leaking from the connection position and improve the waterproof performance. After actual testing, this waterproof measure can meet the long-term operation requirements without leakage;

[0024] 3. Compared with the traditional method of cutting off water supply and opening holes to take over pipes, the construction period of the method of the present invention is greatly shortened. Since there is no need to cut off water supply and drain water, the time for draining water and restoring water supply is reduced; at the same time, the installation of the well chamber and the pipeline can be carried out in parallel, which improves the construction efficiency. According to actual application cases, the construction period is shortened by about 30%, saving users valuable time costs;

[0025] 4. It is applicable to water-holding structures of various types and sizes, such as pools, water tanks, water towers, etc. At the same time, the pipe connection position and pipe diameter can be adjusted according to actual needs, with strong flexibility and adaptability. This feature makes the present invention have a wide range of application prospects in municipal water supply, industrial water, agricultural irrigation and other fields;

[0026] 5. Although the present invention has a certain investment in technology and materials, the overall cost is still relatively low because it avoids the economic losses and social impact caused by water outage. At the same time, the shortened construction period reduces the consumption of manpower and material resources, further reducing the cost. According to the economic benefit analysis, the present invention can save about 20% of the total cost compared with the traditional method;

[0027] 6. Compared with the traditional water-stopping and hole-drilling method, the present invention has significant advantages in non-stop construction, safe and stable structure, short construction period, wide application range and low cost. These advantages make the present invention have important practical significance and promotion value in ensuring water supply continuity, improving construction efficiency and reducing economic costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The present invention is a structural schematic diagram of a construction method for non-stop water pipe connection of a water-holding structure.

[0029] Figure 2 The present invention is a top view structural schematic diagram of a construction method for non-stop water pipe connection of a water-containing structure.

[0030] Figure 3 The present invention is a side structural schematic diagram of a construction method for non-stop water pipe connection of a water-holding structure.

[0031] In the figure, 1. water-containing structure; 2. pool wall; 3. location of the pool wall that needs to be piped; 4. well chamber; 5. casing; 6. pipeline; 7. hole in the pool wall; 8. water surface; 9. pool top; 10. pool bottom; 11. outdoor ground. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0033] Embodiment 1

[0034] Referring to Figures 1 - 3 , the present invention provides a construction method for connecting pipes to a water storage structure without stopping water, which specifically includes the following steps:

[0035] Step S1: Determine the pipe diameter and position to be connected to the water storage structure 1.

[0036] Step S2: Determine the size and position of the well chamber according to the pipe diameter and position.

[0037] Step S3: The well chamber 4 is newly built by implanting steel bars on the pool wall 2 of the existing water storage structure 1, so that the well chamber 4 and the existing water storage structure 1 become an integral body.

[0038] Step S4: The outer wall base layer of the well chamber 4 shall be free of floating ash and oil stains, and the moisture content ≤ 8%.

[0039] Step S5: Embed a waterproof wing ring casing.

[0040] Step S6: Install the pipeline.

[0041] Step S7: Open a hole in the pool wall 2 between the existing water storage structure 1 and the well chamber 4 to obtain a pool wall opening 7, which is a rectangular hole.

[0042] For the transformation of the biological pool in a certain urban sewage treatment plant, a DN400 outlet pipe needs to be connected. The specific implementation plan is as follows:

[0043] Determine the pipe connection position and diameter: The pipe connection position is selected on one side of the pool wall 2 of the biological pool. Considering the local frozen soil depth of 800 mm, the elevation of the existing pool bottom is -2.0 m, and the elevation of the connected pipe is determined to be -1.5 m to ensure that the pipeline will not be damaged due to frozen soil in winter;

[0044] Determine the size and position of the well chamber: According to the pipe diameter, the bottom of the well chamber 4 is 300 mm lower than the bottom of the pipe, that is, the elevation of the bottom of the well chamber 4 is -1.8 m; the width of the well chamber 4 leaves 300 mm on both sides based on the pipe diameter, and the width of the well chamber 4 is determined to be 1000 mm; the top of the well chamber 4 is flush with the existing clear water pool, and the position of the well chamber 4 is determined outside the pipe connection position to ensure that the center of the well chamber 4 is aligned with the center of the connected pipe;

[0045] Newly-built well chamber by implanting steel bars: Implant steel bars on the outer wall of the clear water tank according to the design requirements. The selected specification of the implanted steel bars is HRB400 steel bars with a diameter of 12mm, the drilling diameter is 15mm, the implanting depth is 150mm, the spacing is 100mm, and A-level implanting adhesive is used. After the steel bars are implanted, install the formwork and pour C30 concrete to form the well chamber, making the well chamber 4 integrated with the clear water tank;

[0046] Waterproofing of the well chamber: The base layer should be free of floating ash and oil stains, and the moisture content ≤ 8%; repair the uneven parts with cement mortar, and make the inner and outer corners into arcs with a radius ≥ 50mm; evenly apply the base treatment agent, and the drying time is about 6 hours. Pre-lay the additional layer at the inner and outer corners and other parts, and then lay 3mm SBS waterproof coiled material. The coiled material should be laid flat, and the lapping width should not be less than 100mm to ensure the waterproof effect;

[0047] Embed the waterproof wing ring casing: During the construction of the well chamber, embed a waterproof wing ring casing with an outer diameter of 500mm. The wall thickness of the casing 5 is 8mm, the thickness of the wing ring is 10mm, and the material is Q235 steel. The casing 5 is poured together with the concrete of the well chamber 4, and the wing ring is firmly welded to the casing 5 to prevent leakage. The surface of the casing in contact with the concrete is not anti-corrosive after derusting (there shall be no oil stains and sundries on the surface), and the surface in contact with water and air should be taken anti-corrosion measures (using non-toxic anti-corrosion epoxy paint for the part in contact with water, and the dry film thickness of the paint is not less than 300μm, and other parts are painted with a layer of red lead primer and two layers of finishing paint);

[0048] Install the pipeline: Connect the prefabricated DN400 steel pipe with the waterproof wing ring casing by welding. The welding quality shall meet the requirements of relevant standards. After the pipeline installation is completed, carry out anti-corrosion treatment. First, apply a layer of rust-proof primer, and then apply two layers of anti-corrosion finishing paint;

[0049] Open a hole in the pool wall: Use a water drill to open a hole in the pool wall between the clear water tank and the well chamber. Open a rectangular hole, and the opening area is equivalent to the pipe diameter area. The hole size is 500mm × 300mm, and the top of the hole is 50mm below the water surface. During the hole-opening process, control the drilling speed to prevent excessive damage to the pool wall. After the hole is opened, clean the debris around the hole;

[0050] The entire pipeline connection system consists of the existing clear water tank, the newly-built well chamber, the waterproof wing ring casing, the DN400 steel pipe, and the newly-opened rectangular hole;

[0051] The steel bars are selected as HRB400 grade to ensure the structural strength; the concrete is selected as C30, P6 to meet the requirements of the structural bearing capacity and normal use state of the well chamber; the waterproof wing ring casing is selected as Q235 steel, with certain strength and corrosion resistance; the pipeline is selected as a steel pipe to ensure the safety of water conveyance.

[0052] Through the above material selection and construction steps, the stable structural connection between the newly built well chamber and the clear water tank is ensured. The waterproof wing ring casing effectively prevents leakage. The pipeline installation is firm and meets the water conveyance requirements. The openings on the pool wall meet the conditions for connecting pipes. The entire system realizes the pipe connection operation of the clear water tank without stopping the water supply, without affecting the normal water supply of the water plant.

[0053] Implementation effect: The pipe connection operation of the clear water tank was successfully completed, and the normal operation of the clear water tank was not affected during the construction process. After the pipe connection, through pressure testing and long-term observation, no leakage phenomenon was found, the structure was safe and stable, and the subsequent water supply requirements were met.

[0054] As mentioned above, it is only the specific implementation manner of this application, but the protection scope of this application is not limited thereto. Any person skilled in the art within the technical scope disclosed in this application can easily think of changes or substitutions, which should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claimed rights.

[0055] Finally: The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A construction method for connecting pipes without stopping water in a water storage structure, characterized in that, It includes the following steps: Step S1: Determine the pipe diameter and position of the water storage structure (1) to be connected. Step S2: Determine the size and position of the well chamber according to the pipe diameter and position of the connection pipe. Step S3: The well chamber (4) is newly built by planting steel bars on the pool wall (2) of the existing water storage structure (1), so that the well chamber (4) and the existing water storage structure (1) become an integrated entity. Step S4: The outer wall base layer of the well chamber (4) shall be free of floating ash and oil stains, and the moisture content ≤ 8%. Step S5: Embed a waterproof wing ring casing. Step S6: Install the pipeline. Step S7: Open a hole in the pool wall (2) between the existing water storage structure (1) and the well chamber (4) to obtain a pool wall opening (7), which is a rectangular hole.

2. A construction method for non-stop water connection of a water storage structure according to claim 1, characterized in that: In step S1, the elevation of the connection pipe takes into account the local frozen soil requirements and the elevation of the existing pool bottom.

3. A construction method for non-stop water connection of a water storage structure according to claim 2, characterized in that: In step S2, the bottom of the well chamber (4) is 300 mm lower than the bottom of the pipe. The width of the well chamber (4) leaves 300 mm on both sides based on the pipe diameter, and the top of the well chamber (4) is flush with the existing water storage structure (1).

4. A construction method for non-stop water connection of a water storage structure according to claim 3, characterized in that: In step S3, the spacing of the planted steel bars is controlled within 100 mm - 200 mm. The depth of the planted steel bars is determined according to the force and is not less than 100 mm. Grade A glue or Grade B glue is selected for the planted steel bar glue. The depth of the drilled hole for the planted steel bar is 10 mm longer than the calculated drilled hole depth. The diameter of the drilled hole is 4 - 8 mm larger than the diameter of the steel bar. After the drilled hole is formed, the debris in the hole is cleaned, and then the steel bars are planted, and finally a pull-out test is carried out.

5. A construction method for non-stop water connection of a water storage structure according to claim 4, characterized in that: In step S4, the uneven parts of the outer wall base layer of the well chamber (4) are repaired with cement mortar, and the internal and external corners are plastered into an arc with a radius ≥ 50 mm; the base treatment agent is evenly applied, and the drying time is 6 - 8 hours. An additional layer is pre-laid at the internal and external corner parts, and then a 3 mm SBS waterproof coiled material is laid. The coiled material is laid flat, and the lapping width is not less than 100 mm to ensure the waterproof effect.

6. A construction method for non-stop water connection of a water storage structure according to claim 5, characterized in that: In step S5, during the construction of the well chamber (4), a casing (5) with an outer diameter of 500 mm is embedded. The casing (5) is a waterproof wing ring casing. The wall thickness of the casing (5) is 8 mm, the thickness of the wing ring is 10 mm, and the material is Q235 steel.

7. A construction method for non-stop water connection of a water storage structure according to claim 6, characterized in that: In step S5, the casing (5) is poured together with the concrete of the well chamber (4). The wing ring is firmly welded to the casing (5). The surface of the casing (5) in contact with the concrete is not anti-corrosively treated after rust removal, and there shall be no oil stains and debris on the surface. The surface in contact with water and air shall be anti-corrosively treated. For the surface in contact with water, non-toxic anti-corrosive epoxy paint is used, and the dry film thickness of the paint is not less than 300 μm. For other parts, a layer of red lead primer and two layers of finishing paint are applied.

8. A construction method for connecting pipes without stopping water in a water storage structure according to claim 7, characterized in that: In step S6, the opening area is equivalent to the pipe diameter area, and the top of the hole can be below the water surface. Determine the position and size of the opening according to the drawing. For the hole (7) opened on the pool wall, drilling method, impact method and cutting method are adopted. After the opening is completed, the periphery of the hole is trimmed to ensure that the edge of the hole is neat and smooth.

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