Connection construction method for water plant capacity expansion and transformation pipelines

Abstract

The invention relates to the technical field of pipeline connection, and discloses a water plant capacity expansion and transformation pipeline connection construction method, which is used for connecting and communicating an existing pipeline with a new pipeline, and comprises the following construction steps: 1) excavating at a connection position to form a construction foundation pit, and respectively exposing the existing pipeline and the new pipeline at the bottom of the construction foundation pit; (2) water supply of the existing pipeline is stopped, and water in the existing pipeline is drained; (3) the construction section is cut off, and the water passing section and the waste section are separated and arranged; (4) a sealing cover plate is arranged on the waste pipe end, and the waste pipe end is sealed through the sealing cover plate; (5) a bent pipe section is placed in the construction foundation pit, the water passing section, the bent pipe section and the new pipeline are communicated in sequence, and a water passing structure is formed; through flow optimization (steps 2-5) of'draining-cutting-capping-elbow connection ', parallel operation of cutting and plugging is achieved, procedure connection neutral positions are reduced, the overall construction period is remarkably shortened, and the construction efficiency is improved.

Description

Technical Field

[0001] This invention patent relates to the technical field of pipeline connection, specifically, to a construction method for pipeline connection in the capacity expansion and renovation of water plants. Background Art

[0002] With the acceleration of the urbanization process and the continuous improvement of infrastructure construction, the capacity expansion and renovation projects of water plants are increasing day by day. In these projects, pipeline connection construction is one of the key links, and its construction efficiency and quality are directly related to the progress of the entire renovation project and the stable operation of the water supply system.

[0003] In the prior art, traditional straight pipe docking or flange connection requires the new and old pipes to be highly matched in terms of size, elevation, and position. However, in actual projects, due to laying time, geological changes, and construction errors, there are often elevation differences or position offsets between the new and old pipes, increasing the construction complexity and leakage risk;

[0004] Moreover, in the prior art, after completely shutting off the water supply, the water in the pipeline needs to be drained by gravity drainage or sectional pumping. This takes a long time and it is difficult to completely drain the residual water, affecting the subsequent welding or sealing quality and hindering the construction progress;

[0005] Furthermore, the existing construction needs to be carried out in the order of "shut off water → drain water → cut → temporary support → connect → seal". There are waiting times in each link (such as drainage verification, support acceptance), resulting in a long construction period, reduced construction efficiency, and increased costs. Summary of the Invention

[0006] The purpose of the present invention is to provide a construction method for pipeline connection in the capacity expansion and renovation of water plants, aiming to solve the problem of low construction efficiency in pipeline connection construction in the prior art.

[0007] The present invention is implemented as follows. A construction method for pipeline connection in the capacity expansion and renovation of water plants, used to connect and communicate an existing pipeline with a new pipeline, includes the following construction steps:

[0008] 1). Determine the connection position, excavate at the connection position to form a construction foundation pit. The existing pipeline and the new pipeline are respectively exposed at the bottom of the construction foundation pit. The new pipeline has a new pipe end exposed in the construction foundation pit, and the existing pipeline has a construction section exposed in the construction foundation pit;

[0009] 2). Shut off the water supply to the existing pipeline and drain the water body in the existing pipeline;

[0010] 3). Cut the construction section to make the existing pipeline form a water - passing section and a waste section. The water - passing section and the waste section are arranged separately and disconnected. The water - passing section has an old pipe end exposed in the construction foundation pit, and the waste section has a waste pipe end exposed in the construction foundation pit;

[0011] 4) Arrange a sealing cover plate on the end of the waste pipe, and the sealing cover plate encloses and arranges the end of the waste pipe;

[0012] 5) Lower the elbow section into the construction foundation pit. One end of the elbow section communicates with the end of the old pipe, and the other end of the elbow section communicates with the end of the new pipe. The water passage section, the elbow section, and the new pipeline are connected in sequence to form a water passage structure.

[0013] Further, in the construction step 1), a plurality of Larssen sheets are inserted into the outer periphery of the connection position. The plurality of Larssen sheets are arranged around the circumference of the connection position. When a construction foundation pit is formed at the connection position, the plurality of Larssen sheets are arranged around the circumference of the construction foundation pit to support the outer periphery of the construction foundation pit.

[0014] Further, in the construction step 1), the bottom of the construction foundation pit is located below the construction section. There is a construction interval between the construction section and the bottom of the construction foundation pit. Spacers are inserted into the construction interval, and the spacers support the construction section.

[0015] Further, in the construction step 3), after the construction section is cut off, the discarded section has a demolition section exposed in the construction foundation pit. The demolition section is cut and demolished so that an empty construction area is formed in the construction foundation pit, and the end of the old pipe of the water passage section faces the construction area.

[0016] Further, in the construction step 4), after the demolition section in the construction foundation pit is hoisted out, a sealing cover plate is arranged on the end of the waste pipe. The sealing cover plate is welded to the discarded section to seal the end of the waste pipe.

[0017] Further, in the construction step 4), the demolition section is hoisted out of the construction foundation pit by using two parallel lifting ropes. The lifting ropes have bottom sections wound around the bottom of the demolition section. An arc-shaped pad is connected to the bottom section. The bottom section movably passes through the arc-shaped pad. The arc-shaped pad abuts against the bottom of the demolition section from bottom to top and is arc-shapedly fitted with the demolition section.

[0018] Further, in the construction step 5), a bending hole is provided in the middle of the arc-shaped pad. The bending hole is arranged in multiple sections of bends along the width of the arc-shaped pad, and the bending hole extends along the length direction of the arc-shaped pad and penetrates through the end of the arc-shaped pad;

[0019] The bottom section is arranged in multiple sections of bends in the same direction as the bending hole along the length direction of the bending hole. The two ends of the arc-shaped pad are respectively fixedly connected to the bottom section, and the middle of the arc-shaped pad is fixedly connected to the middle of the bottom section.

[0020] Further, in the construction step 5), along the width direction of the arc-shaped pad, a top groove is formed at the top of the arc-shaped pad. The bottom of the top groove has two top surfaces, and the top surfaces extend upward obliquely from the middle of the arc-shaped pad toward the side of the arc-shaped pad.

[0021] In the construction step 5), side strips are provided on the sides of the arc-shaped pad, and an elastic strip is provided in the middle of the top groove. The elastic strip extends in a multi-segment bent manner along the length direction of the arc-shaped pad. During the process of lifting out the demolition section, the two side strips and the elastic strip of the arc-shaped pad press against the bottom of the demolition section from bottom to top, and the elastic strip is in a compressed and deformed state.

[0022] Further, in the construction step 5), flanges are respectively provided at both ends of the elbow section for butt-connecting and communicating with the old pipe end and the new pipe end.

[0023] Further, in the construction step 5), after the elbow section is lowered into the construction foundation pit, a plurality of support blocks are placed at the bottom of the elbow section. The plurality of support blocks are arranged at intervals along the bending direction of the elbow section, and the plurality of support blocks support the elbow section to fix the elbow section in place.

[0024] After the water passing section, the elbow section, and the new pipeline are connected in sequence to form a water passing structure, the construction foundation pit is backfilled with soil to bury the construction foundation pit.

[0025] Compared with the prior art, the pipeline connection construction method for water plant capacity expansion and transformation provided by the present invention has the following specific technical effects and advantages:

[0026] 1), By lowering the elbow section into the construction foundation pit (step 5), it allows the new and old pipelines to be quickly connected even when there are certain deviations in elevation or plane position, thus avoiding the problem of pipeline position mismatch, reducing the construction complexity, and improving the construction efficiency.

[0027] 2), After shutting off the water supply of the existing pipeline, by draining the water in the existing pipeline in a directional manner (step 2) and combining with the rapid capping technology (step 4), the water shut-off time is greatly compressed to only the pumping and plugging operation period, which not only reduces the water shut-off cycle but also reduces the impact on the water supply to residents, thereby improving the overall construction efficiency.

[0028] 3), Through the process optimization of "draining - cutting - capping - elbow connection" (steps 2 - 5), the parallel operation of cutting and plugging is realized, reducing the blank space in the process connection. Compared with the traditional multi-step serial construction mode, the overall construction period is significantly shortened, and the construction efficiency is improved. Description of the Drawings

[0029] Figure 1It is a schematic flow diagram of the pipeline connection construction method for the water plant capacity expansion and renovation provided by the present invention;

[0030] Figure 2 It is a top view schematic diagram of the construction foundation pit provided by the present invention;

[0031] Figure 3 It is a sectional view schematic diagram of the removed section being lifted out by the lifting rope provided by the present invention;

[0032] Figure 4 It is a sectional view schematic diagram of the arc-shaped pad provided by the present invention;

[0033] In the figure: construction foundation pit 100, new pipeline 101, new pipe end 102, existing pipeline 103, water passing section 104, waste pipe end 105, cover plate 106, elbow section 107, flange 108, sheet pile 109;

[0034] Removed section 200, lifting rope 201, arc-shaped pad 202, bending hole 203, top groove 204, top surface 205, side strip 206, elastic strip 207. Detailed implementation manners

[0035] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0036] The implementation of the present invention will be described in detail below with specific embodiments.

[0037] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the accompanying drawings are only for illustrative purposes and cannot be understood as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0038] Refer to Figures 1-4 as shown, it is a preferred embodiment provided by the present invention.

[0039] The pipeline connection construction method for the water plant capacity expansion and renovation, which is used to connect and communicate the existing pipeline 103 and the new pipeline 101, includes the following construction steps:

[0040] 1) Determine the connection position, excavate at the connection position to form a construction foundation pit 100. The existing pipeline 103 and the new pipeline 101 are respectively exposed at the bottom of the construction foundation pit 100. The new pipeline 101 has a new pipe end 102 exposed in the construction foundation pit 100, and the existing pipeline 103 has a construction section exposed in the construction foundation pit 100.

[0041] 2) Cut off the water supply to the existing pipeline 103, and drain the water body in the existing pipeline 103.

[0042] 3) Carry out a cutting treatment on the construction section so that the existing pipeline 103 forms a water - passing section 104 and a discarded section. The water - passing section 104 and the discarded section are arranged separately and disconnected. The water - passing section 104 has an old pipe end exposed in the construction foundation pit 100, and the discarded section has a waste pipe end 105 exposed in the construction foundation pit 100.

[0043] 4) Arrange a sealing cover plate 106 on the waste pipe end 105, and the sealing cover plate 106 seals the waste pipe end 105.

[0044] 5) Lower a bent pipe section 107 in the construction foundation pit 100. One end of the bent pipe section 107 is connected to the old pipe end, and the other end of the bent pipe section 107 is connected to the new pipe end 102. The water - passing section 104, the bent pipe section 107, and the new pipeline 101 are connected in sequence to form a water - passing structure.

[0045] The above - provided construction method for pipeline connection in the water plant capacity expansion and renovation has the following specific technical effects and advantages:

[0046] 1) By lowering the bent pipe section 107 in the construction foundation pit 100 (step 5), it allows the new and old pipelines to be quickly connected even when there are certain deviations in elevation or plane position. This avoids the problem of pipeline position mismatch, thereby reducing the construction complexity and improving the construction efficiency.

[0047] 2) After cutting off the water supply to the existing pipeline 103, by draining the water body in the existing pipeline 103 in a directional manner (step 2) and combining with the rapid capping technology (step 4), the water - cut - off time is greatly compressed to only the pumping and plugging operation period. This not only reduces the water - cut - off cycle but also reduces the impact on the water supply to residents, thereby improving the overall construction efficiency.

[0048] 3) Through the process optimization of "draining - cutting - capping - bent pipe connection" (steps 2 - 5), the parallel operation of cutting and plugging is realized, reducing the gap in process connection. Compared with the traditional multi - step serial construction mode, the overall construction period is significantly shortened and the construction efficiency is improved.

[0049] The "elevation" mentioned in this embodiment refers to the height position of the pipeline in the vertical direction; for example, there are two water pipes, one on the ground and the other underground, and the heights of these two water pipes are different. The water pipe on the ground is higher than the one underground. Here, the "higher" and "lower" mean elevation.

[0050] In the pipeline connection construction method for the capacity expansion and renovation of this water plant, by using the elbow section 107 (a bendable pipeline), even if the heights of two pipelines are different in the vertical direction, the elbow section 107 can smoothly connect them, allowing the water to flow unobstructed, thus solving the connection problem between pipelines of different heights and making the construction more convenient and efficient.

[0051] In this embodiment, in construction step 1), a plurality of Larssen sheets 109 are inserted outside the periphery of the connection position. The plurality of Larssen sheets 109 are arranged circumferentially around the connection position. When a construction foundation pit 100 is formed at the connection position, the plurality of Larssen sheets 109 are arranged circumferentially around the construction foundation pit 100 to provide peripheral support for the construction foundation pit 100.

[0052] Through the peripheral support, it effectively prevents the construction foundation pit 100 from collapsing during the excavation process, ensures the safety and stability of the construction, reduces the construction delay caused by the collapse of the foundation pit, and thus improves the construction efficiency.

[0053] In this embodiment, in construction step 1), the bottom of the construction foundation pit 100 is located below the construction section, and there is a construction interval between the construction section and the bottom of the construction foundation pit 100. A spacer is inserted into the construction interval, and the spacer supports the construction section.

[0054] Through the supporting effect of the spacer, the shaking of the construction section is effectively reduced, ensuring the stability of the construction section during the cutting process, avoiding deformation or damage caused by the weight of the pipeline, and thus improving the accuracy and safety of the construction and indirectly enhancing the construction efficiency.

[0055] In this embodiment, in construction step 3), after the construction section is cut off, the discarded section has a demolition section 200 exposed in the construction foundation pit 100. The demolition section 200 is cut and demolished so that an empty construction area is formed in the construction foundation pit 100, and the old pipe end of the water passing section 104 is arranged towards the construction area.

[0056] By cutting and demolishing the discarded section in advance, it provides sufficient space for the subsequent installation of the elbow section 107, reduces the interference during the construction process, and significantly improves the construction efficiency.

[0057] In this embodiment, in construction step 4), after the demolition section 200 in the construction foundation pit 100 is hoisted out, a cover plate 106 is arranged on the waste pipe end 105, and the cover plate 106 is welded to the discarded section to seal the waste pipe end 105.

[0058] In this way, by using the method of quick capping, the long waiting time of traditional plugging methods (such as concrete pouring) is avoided, greatly shortening the construction period and thus improving the construction efficiency of pipeline connection.

[0059] In this embodiment, in construction step 4), the demolition section 200 is hoisted out of the construction foundation pit 100 by using two parallelly arranged lifting ropes 201. The lifting rope 201 has a bottom section wound around the bottom of the demolition section 200. An arc-shaped pad 202 is connected to the bottom section. The bottom section movably passes through the arc-shaped pad 202. The arc-shaped pad 202 abuts against the bottom of the demolition section 200 from bottom to top and is arc-shapedly fitted with the demolition section 200.

[0060] Through the synergistic effect of the lifting rope 201 and the arc-shaped pad 202, the stable hoisting of the demolition section 200 is ensured, avoiding damage or safety accidents caused by shaking and improving the construction safety and efficiency.

[0061] In this embodiment, in construction step 5), a bending hole 203 is provided in the middle of the arc-shaped pad 202. The bending hole 203 is arranged in multiple sections of bends along the width of the arc-shaped pad 202 and extends along the length direction of the arc-shaped pad 202, penetrating the end of the arc-shaped pad 202.

[0062] The bottom section is arranged in multiple sections of bends in the same direction as the bending hole 203 along the length direction of the bending hole 203. The two ends of the arc-shaped pad 202 are respectively fixedly connected to the bottom section, and the middle of the arc-shaped pad 202 is fixedly connected to the middle of the bottom section.

[0063] Through the fixed connection between the bending hole 203 and the bottom section, the connection stability between the lifting rope 201 and the demolition section 200 is enhanced, ensuring the smooth progress of the hoisting process and further improving the construction efficiency.

[0064] In this embodiment, in construction step 5), along the width direction of the arc-shaped pad 202, a top groove 204 is formed at the top of the arc-shaped pad 202. The bottom of the top groove 204 has two top surfaces 205, and the top surfaces 205 extend upward obliquely from the middle of the arc-shaped pad 202 towards the side of the arc-shaped pad 202.

[0065] In construction step 5), the side of the arc-shaped pad 202 has side strips 206, and an elastic strip 207 is provided in the middle of the top groove 204. The elastic strip 207 extends in multiple sections of bends along the length direction of the arc-shaped pad 202. During the process of hoisting out the demolition section 200, the two side strips 206 and the elastic strip 207 of the arc-shaped pad 202 press against the bottom of the demolition section 200 from bottom to top, and the elastic strip 207 is in a compressed and deformed state.

[0066] Through the buffering effect of the elastic strip 207 and the side strip 206, the impact on the demolition section 200 during the hoisting process is effectively reduced, the integrity of the pipeline is protected, and the safety and reliability of the construction are further improved.

[0067] In this embodiment, in construction step 5), both ends of the elbow section 107 are respectively provided with butt joints and connections to the old pipe end and the new pipe end 102 through the flange 108.

[0068] In this way, rapid and reliable pipeline connection is achieved, avoiding the complexity and time cost of traditional welding methods, and improving the efficiency of pipeline connection.

[0069] In this embodiment, in construction step 5), after the elbow section 107 is lowered into the construction foundation pit 100, a plurality of support blocks are placed at the bottom of the elbow section 107. The plurality of support blocks are arranged at intervals along the bending direction of the elbow section 107, and the plurality of support blocks support the elbow section 107 so that the elbow section 107 is fixedly arranged;

[0070] When the water passing section 104, the elbow section 107, and the new pipeline 101 are sequentially connected to form a water passing structure, the soil body is backfilled into the construction foundation pit 100 to bury the construction foundation pit 100.

[0071] By placing a plurality of support blocks, the stability of the elbow section 107 during installation is ensured, the installation error caused by pipeline shaking is reduced, and the construction accuracy and efficiency of pipeline connection are significantly improved.

[0072] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. Construction method for pipeline connection in the capacity expansion and renovation of a waterworks, characterized in that, For connecting an existing pipeline and a new pipeline, the following construction steps are included: 1), Determine the connection position, excavate at the connection position to form a construction foundation pit. The existing pipeline and the new pipeline are respectively exposed at the bottom of the construction foundation pit. The new pipeline has a new pipe end exposed in the construction foundation pit, and the existing pipeline has a construction section exposed in the construction foundation pit; 2), Stop the water supply of the existing pipeline and drain the water body in the existing pipeline; 3), Cut the construction section to make the existing pipeline form a water - passing section and a waste section. The water - passing section and the waste section are arranged separately and disconnected. The water - passing section has an old pipe end exposed in the construction foundation pit, and the waste section has a waste pipe end exposed in the construction foundation pit; 4), Arrange a sealing cover plate on the waste pipe end, and the sealing cover plate closes the waste pipe end; 5), Lower a bent pipe section into the construction foundation pit. One end of the bent pipe section is connected to the old pipe end, and the other end of the bent pipe section is connected to the new pipe end. The water - passing section, the bent pipe section and the new pipeline are connected in sequence to form a water - passing structure.

2. The pipeline connection construction method for the capacity expansion and renovation of a waterworks according to claim 1, characterized in that, In the construction step 1), a plurality of Larssen sheets are lowered into the outer periphery of the connection position. The plurality of Larssen sheets are arranged in a circumferential direction around the connection position. When the construction foundation pit is formed at the connection position, the plurality of Larssen sheets are arranged in a circumferential direction around the construction foundation pit to support the outer periphery of the construction foundation pit.

3. The pipeline connection construction method for the capacity expansion and renovation of a waterworks as described in claim 1, characterized in that, In the construction step 1), the bottom of the construction foundation pit is located below the construction section, and there is a construction interval between the construction section and the bottom of the construction foundation pit. A cushion block is inserted into the construction interval, and the cushion block supports the construction section.

4. The pipeline connection construction method for the capacity expansion and renovation of a waterworks according to any one of claims 1 to 3, characterized in that, In the construction step 3), after cutting the construction section, the waste section has a demolition section exposed in the construction foundation pit. Cut and demolish the demolition section to form an empty construction area in the construction foundation pit, and the old pipe end of the water - passing section faces the construction area.

5. The construction method of pipeline connection for water plant capacity expansion and renovation according to claim 4, characterized in that, In the construction step 4), after lifting out the demolition section in the construction foundation pit, then arrange a sealing cover plate on the waste pipe end. The sealing cover plate is welded to the waste section to close the waste pipe end.

6. The construction method for pipeline connection in the expansion and renovation of a water plant as described in claim 4, characterized in that, In the construction step 4), use two parallel lifting ropes to lift out the demolition section from the construction foundation pit. The lifting rope has a bottom section wound around the bottom of the demolition section. An arc - shaped pad is connected to the bottom section. The bottom section passes through the arc - shaped pad movably. The arc - shaped pad abuts against the bottom of the demolition section from bottom to top and is arc - shaped and fitted with the demolition section.

7. The pipeline connection construction method for the water plant capacity expansion and renovation as described in claim 6, wherein In the construction step 5), a bending hole is provided in the middle of the arc - shaped pad. The bending hole is arranged in multiple bends along the width of the arc - shaped pad and extends along the length direction of the arc - shaped pad, passing through the end of the arc - shaped pad; The bottom section is arranged in multiple bends in the same direction as the length direction of the bending hole along the length direction of the bending hole. The two ends of the arc - shaped pad are respectively fixedly connected to the bottom section, and the middle of the arc - shaped pad is fixedly connected to the middle of the bottom section.

8. The construction method of pipeline connection for the capacity expansion and renovation of a water plant according to claim 6, characterized in that, In the construction step 5), along the width direction of the arc-shaped pad, a top groove is formed at the top of the arc-shaped pad. The bottom of the top groove has two top surfaces, and the top surfaces extend upward obliquely from the middle of the arc-shaped pad towards the side of the arc-shaped pad. In the construction step 5), side strips are provided on the sides of the arc-shaped pad, and an elastic strip is provided in the middle of the top groove. The elastic strip extends in a multi-segment bent manner along the length direction of the arc-shaped pad. During the process of lifting out the demolition section, the two side strips and the elastic strip of the arc-shaped pad press against the bottom of the demolition section from bottom to top, and the elastic strip is in a compressed deformation state.

9. The pipeline connection construction method for the capacity expansion and renovation of a water plant according to any one of claims 1 to 3, characterized in that In the construction step 5), both ends of the elbow section are respectively connected and communicated with the old pipe end and the new pipe end through flange plates.

10. The construction method for pipeline connection in the capacity expansion and renovation of a water plant according to any one of claims 1 to 3, characterized in that, In the construction step 5), after the elbow section is lowered into the construction foundation pit, a plurality of support blocks are placed at the bottom of the elbow section. The plurality of support blocks are arranged at intervals along the bending direction of the elbow section, and the plurality of support blocks support the elbow section to fix the elbow section in place. When the water passing section, the elbow section, and the new pipeline are sequentially connected to form a water passing structure, the construction foundation pit is backfilled with soil to bury the construction foundation pit.

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