CN111928015B - Pipeline dismantling and installing construction method in narrow space - Google Patents
Pipeline dismantling and installing construction method in narrow space Download PDFInfo
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- CN111928015B CN111928015B CN202010702447.9A CN202010702447A CN111928015B CN 111928015 B CN111928015 B CN 111928015B CN 202010702447 A CN202010702447 A CN 202010702447A CN 111928015 B CN111928015 B CN 111928015B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
- F16L1/028—Laying or reclaiming pipes on land, e.g. above the ground in the ground
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
- B66C13/08—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for depositing loads in desired attitudes or positions
- B66C13/085—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for depositing loads in desired attitudes or positions electrical
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
- F16L1/028—Laying or reclaiming pipes on land, e.g. above the ground in the ground
- F16L1/036—Laying or reclaiming pipes on land, e.g. above the ground in the ground the pipes being composed of sections of short length
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
- F16L1/06—Accessories therefor, e.g. anchors
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bridges Or Land Bridges (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a pipeline dismantling and installing construction method in a narrow space, which specifically comprises the following steps according to the construction sequence: the construction equipment, the transportation and the hoisting tool are manufactured, the pipeline is dismantled, the pipeline is transported, the pipeline is newly built, the pipeline is assembled, installed and tested, the pipeline which needs to be replaced and penetrates through the narrow space is laid in the narrow space by the support pier, the pipeline needs to be dismantled and laid on the lower layer of one side in the tunnel, and the newly built pipeline is laid on the upper layer of the pipe pier. The invention mainly aims at the technical defects existing in the construction of laying and replacing pipelines in the narrow space of the existing long and narrow tunnel, and the corresponding pipe dismounting method is adopted for dismounting the pipelines in the special environment, so that the pipelines in the tunnel can be quickly and effectively dismounted under the condition of ensuring the safe operation of pipe dismounting; meanwhile, the newly-built pipeline is transported to the position to be installed by the trolley, and the pipeline is lifted to the installation position by the lifting device to be installed, so that technical requirements of laying, transporting, welding and the like of the oil pipeline in the long and narrow tunnel are met.
Description
Technical Field
The invention belongs to the technical field of pipeline construction, and particularly relates to a pipeline dismounting and mounting construction method in a narrow space.
Background
At present, the scale of the petrochemical long-distance pipeline is gradually enlarged in China, the construction amount for installing and replacing the pipeline in various tunnels is continuously increased, the technology for laying the pipeline in a large tunnel is mature day by day, but the construction technology for laying and replacing the pipeline in a narrow tunnel cannot follow the development of the laying of the current long-distance pipeline.
If most of the pipeline projects of a certain project are buried, a DN200 oil pipeline connecting an operation area and an oil storage area needs to be replaced in the off-road pipeline projects, the pipeline is about 2500 m long, most of the pipeline is laid by pipe piers, the local part of the pipeline is laid by underground pipe ditches, and 600 m long pipeline is laid in a tunnel and a cover plate ditch. The pipeline laid by the above-ground pipe pier passes through the land of the adjacent villagers, is far away from the road, cannot be hoisted in place by adopting hoisting equipment, and is difficult to transport; the pipelines laid in the tunnel and the cover plate ditch are far away from the road, and cannot be hoisted in place by adopting hoisting equipment and are difficult to transport.
The pipeline is removed and replaced at this time, and the pipeline is detected to be an oil pipeline which does not meet the safe use requirement and is stopped. When the pipeline is stopped for a long time, the owner recovers the residual oil in the pipeline and performs long-term ventilation treatment, the pipeline is long and has more dead angles, and the residual oil in the pipeline cannot be completely accumulated, so the safety guarantee measures of the pipeline dismantling work in the pipe ditch and the tunnel are the safety key points of the dismantling work.
Therefore, a new schedule is provided for transportation in place of the construction pipeline in the field narrow tunnel, protection during transportation of the 3PE anticorrosive coating and improvement of the welding technology in the narrow space. In future construction, the situations of laying and replacing multiple pipelines and long and narrow tunnels together are increased, so that the technologies of laying, transporting, welding and the like of pipelines in the long and narrow tunnels need to be perfected.
Disclosure of Invention
The invention aims to: in order to solve the problems, a construction method suitable for removing and installing pipelines in a narrow space is provided.
The technical scheme of the invention is realized as follows: a pipeline dismantling and installing construction method in a narrow space specifically comprises the following steps according to the construction sequence: construction equipment, transportation and lifting device preparation, pipeline demolish, demolish the transport of pipeline, the transportation of newly-built pipeline, the group of pipeline to and installation and experiment, its characterized in that:
the pipeline which needs to be replaced and passes through the narrow space is laid in the narrow space by adopting the buttress, the pipeline needs to be dismantled and laid on the lower layer of one side in the narrow space, and the newly-built pipeline is laid on the upper layer of the pipe pier;
the concrete construction method for dismantling the pipeline comprises the following steps: firstly, flushing the interior of a pipeline to be dismantled by fire water, and carrying out dismantling operation only after the flushing is qualified; then, manually cutting the pipeline to be dismantled in the narrow space into a plurality of sections; then conveying the cut pipeline to a courtyard through a transport trolley, cutting the pipeline into short sections by flame cutting, and hoisting the short sections out of the courtyard by using a hoisting mechanism;
before flame cutting, firstly, the residual water and residual oil in the pipeline must be completely recovered, and the specific recovery method comprises the following steps: slowly jacking one end of the pipeline by using a jack, collecting the other end of the pipeline by using a container, cleaning the pipeline integrally from one end to the other end by using cotton yarns, and adsorbing residual water and residual oil; then, cleaning an anticorrosive coating at the cutting position after the cutting point is determined, forming a skylight at the cutting position, and checking the conditions of residual water and residual oil in the pipeline; finally, detecting whether residual gas in the pipeline meets the firing requirement by using a gas detector, carrying out dismantling operation if the residual gas meets the fire requirement, cleaning the pipeline again according to the flow if the residual gas does not meet the fire requirement, and carrying out flame cutting operation until the residual gas meets the requirement and dry sand is laid on the lower part of a cutting point;
the concrete transportation method of the newly-built pipeline comprises the following steps: the pipeline is transported to an operation platform at a narrow space opening to be stacked, the pipeline transportation and distribution mode of a winch traction trolley is adopted for the pipeline transportation and distribution in the narrow space, and after the pipeline is transported to the installation position, the pipeline is lifted to the installation position on the upper layer of the pipe pier by a lifting device to be paired.
The pipeline dismantling and installing construction method in the narrow space has the advantages that each section of the pipeline which is manually sawn off is 30-40 m long, and a rectangular skylight is formed in the cutting position after an anticorrosive coating at the cutting position is cleaned before flame cutting.
According to the construction method for removing and installing the pipeline in the narrow space, before the pipeline of the newly-built pipeline in the narrow space is transported, firstly, two parallel rails are laid in the narrow space, the end parts of the rails extend out of a narrow space opening, a trolley is arranged on the rails, the newly-built pipeline to be installed is placed on the trolley and fixed, then the newly-built pipeline is transported to an installation position through the trolley, and the trolley is pulled by a winch arranged outside the narrow space through a traction rope.
According to the construction method for dismantling and installing the pipeline in the narrow space, the track is arranged along the pedestrian passageway on one side of the narrow space, the gradient of the bottom surface of the narrow space is 5 per mill, and the track is fixed by taking the buttress as a stress point.
According to the pipeline dismounting and mounting construction method in the narrow space, the trolley comprises a pipeline supporting platform and a pipeline fixing clamp, the newly-built pipeline is placed on the pipeline supporting platform, the pipeline fixing clamp is reversely buckled above the newly-built pipeline, two ends of the pipeline fixing clamp are connected with the pipeline supporting platform, and the newly-built pipeline is fixed on the trolley for transportation through the matching of the pipeline fixing clamp and the pipeline supporting platform.
According to the pipeline dismounting and mounting construction method in the narrow space, the rubber base plate is arranged between the newly-built pipeline and the pipeline supporting platform, the rubber base plate is of an arc-shaped structure matched with the lower portion of the newly-built pipeline, and the pipeline fixing clamp is of an arc-shaped structure matched with the upper portion of the newly-built pipeline.
According to the pipeline dismounting and mounting construction method in the narrow space, the lifting device comprises the movable hanging bracket arranged above the trolley, one end of the movable hanging bracket is connected with the movable hanging bracket support arranged on the trolley, the other end of the movable hanging bracket is supported on the pipe pier, and the upper end of the movable hanging bracket is provided with a lifting appliance for lifting a newly-built pipeline on the trolley.
According to the construction method for removing and installing the pipeline in the narrow space, the movable support plate is arranged in the middle of the movable hanging bracket, one end of the movable support plate is connected with the movable hanging bracket, the other end of the movable support plate is overlapped on the edge of the upper end face of the pipe pier, and a temporary transition supporting surface from the movable hanging bracket to the pipe pier is formed for the newly-built pipeline.
The invention mainly aims at the technical defects existing in the construction of laying and replacing pipelines in the narrow space of the existing long and narrow tunnel, and the corresponding pipe dismounting method is adopted for dismounting the pipelines in the special environment, so that the pipelines in the tunnel can be quickly and effectively dismounted under the condition of ensuring the safe operation of pipe dismounting; meanwhile, the newly-built pipeline is transported to the position to be installed by the trolley, and the pipeline is lifted to the installation position by the lifting device to be installed, so that technical requirements of laying, transporting, welding and the like of the oil pipeline in the long and narrow tunnel are met.
Drawings
FIG. 1 is a construction flow chart of the present invention.
Fig. 2 is a schematic diagram of the transportation of the newly built pipeline of the present invention.
Fig. 3 is a schematic view of the structure of the cart of the present invention.
Fig. 4 is a schematic diagram of the hoisting of the newly-built pipeline in the invention.
The labels in the figure are: the device comprises a tunnel 1, a pipeline 2 to be dismantled, a newly-built pipeline 3, a pipe pier 4, a main force winch 5, a traction rope 6, a brake winch 7, a rail 8, a pipeline supporting platform 9, a pipeline fixing clamp 10, a rubber base plate 11, a movable hanging bracket 12, a movable hanging bracket support 13, a hanging tool 14, a movable supporting plate 15 and a trolley 16.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following description of the present invention with reference to the accompanying drawings and embodiments will be made in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting.
As shown in fig. 1, a method for removing and installing a pipeline in a narrow space, where the narrow space is a long and narrow tunnel, the pipeline is mainly an oil pipeline, and the method specifically includes, according to a construction sequence: the method comprises the following steps of construction equipment, manufacturing of a transportation and hoisting tool, dismantling of a pipeline, carrying of the dismantled pipeline, transportation of a newly-built pipeline, assembly and installation of the pipeline and testing. In this embodiment, the oil pipeline passing through the tunnel 1 to be replaced is laid in the tunnel 1 by using the buttress, the pipeline 2 needs to be removed and laid on the lower layer of one side in the tunnel, and the newly-built pipeline 3 is laid on the upper layer of the pipe pier 4. Because the space in the tunnel is narrow and small, the number of operators in the tunnel is not too large, and the construction of the tunnel crossing section adopts a mode of assembling and welding in the tunnel.
The concrete construction method for dismantling the pipeline comprises the following steps: the inside of an oil pipeline to be dismantled is washed by fire-fighting water, and the dismantling operation can be carried out only after the washing is qualified.
And manually cutting the pipeline to be removed in the tunnel into a plurality of sections. The tunnel is narrow in space, the number of up-and-down fluctuation points and elbows of the pipeline is large, oil and water are not easy to remove after the pipeline is washed in the pipeline, therefore, the pipeline in the tunnel cannot be cut off by adopting a flame cutting mode, and meanwhile, the pipeline cannot be cold cut by adopting other machines due to space limitation, so that the pipeline can only be manually sawed, and the pipeline needing to be dismantled in the tunnel is firstly sawed into a plurality of sections by manual in consideration of time-effect relation, and each section is 30-40 m long.
And then conveying the cut pipeline to the courtyard through a transport trolley, cutting the pipeline into short sections by flame cutting, and hoisting the short sections out of the courtyard by using a hoisting mechanism.
Specifically, before flame cutting, firstly, the residual water and residual oil in the pipeline must be completely recovered and treated, and the specific recovery method is as follows: slowly jacking one end of the pipeline by using a jack, collecting the other end of the pipeline by using a container, cleaning the pipeline integrally from one end to the other end by using cotton yarns, and adsorbing residual water and residual oil; then, cleaning an anticorrosive coating at the cutting position after the cutting point is determined, opening a rectangular skylight of 15cmx10cm at the cutting position, checking the conditions of residual water and residual oil in the pipeline, and if the residual water and the residual oil exist, completely recovering and treating; and finally, detecting whether residual gas in the pipeline meets the fire requirement by using a four-in-one gas detector, removing the pipeline if the residual gas meets the fire requirement, cleaning the pipeline again according to the flow if the residual gas does not meet the fire requirement, performing flame cutting operation until the residual gas meets the requirement and dry sand is laid on the lower part of a cutting point, and completely removing accumulated water, inflammable matters and the like on the periphery of the cutting point.
The concrete transportation method of the newly-built pipeline comprises the following steps: the pipeline is transported to an operation platform at a tunnel entrance to be stacked, the pipeline transportation and distribution mode of a winch traction trolley 16 is adopted for pipeline transportation and distribution in the tunnel, and after the pipeline is transported to the installation position, the pipeline is lifted to the installation position on the upper layer of the pipe pier by a lifting device to be paired.
As shown in fig. 2, before the new pipeline is transported in the tunnel, two parallel tracks are first laid in the tunnel, the ends of the tracks extend out of the tunnel opening for a certain length, a trolley is arranged on the tracks, the new pipeline to be installed is placed on the trolley and fixed, then the new pipeline is transported to an installation position through the trolley, and the trolley is pulled by a winch arranged outside the tunnel through a traction rope.
In the present embodiment, the main construction machine is a 20t main force hoist 5, and the traction ropes 6, 20t brake hoist 7, a sleeper, a rail 8, and the like. The track is made of No. 10 channel steel, the length of each channel steel is 6M, a connecting plate and bolts are adopted for fixing the channel steel, the thickness of the connecting plate is not smaller than 12mm, the bolts are M18 single-head bolts, the two sides of the connecting plate are fixed, the bottom of the channel steel is fixed to the ground through expansion bolts, the track is arranged along a pedestrian passageway on one side of a tunnel, the gradient of the bottom surface of the tunnel is 5 per thousand, construction safety is considered, a buttress is used as a stress point for fixing the track, and the light track is prevented from sliding in the construction process; the method comprises the steps of arranging a winch (fixing an embedded concrete foundation) at the exit of a tunnel to provide traction, wherein the size of the concrete foundation is 2.5m multiplied by 1.5m multiplied by 1.0m, fixing the winch and the foundation by using an embedded bolt, selecting the winch and selecting a steel wire rope, calculating according to the weight and the gradient of each pipe, considering enough safety factor, and determining the length of the steel wire rope of the winch according to the field condition, wherein the traction is more than F M according to a minimum traction calculation formula.
As shown in fig. 3, the trolley 16 includes a pipeline supporting platform 9 and a pipeline fixing clip 10, the newly-built pipeline 3 is placed on the pipeline supporting platform 9, the pipeline fixing clip 10 is reversely buckled above the newly-built pipeline 3, two ends of the pipeline fixing clip 10 are connected with the pipeline supporting platform 9, and the newly-built pipeline 3 is fixed on the trolley for transportation through the cooperation of the pipeline fixing clip 10 and the pipeline supporting platform 9.
In order to avoid newly-built pipeline and pipeline supporting platform direct contact and cause destruction each other be provided with rubber tie plate 11 between newly-built pipeline 3 and the pipeline supporting platform 9, rubber tie plate 11 is with newly-built 3 lower part assorted arc structures of pipeline, pipeline fixing clip 10 is with newly-built 3 upper portion assorted arc structures of pipeline, for increasing safety, manual arresting gear of installation on every dolly.
As shown in fig. 4, the lifting device comprises a movable hanger 12 arranged above the trolley, one end of the movable hanger 12 is connected with a movable hanger support 13 arranged on the trolley, the other end of the movable hanger 12 is supported on the pipe pier 4, a lifting appliance 14 for lifting a newly-built pipeline 3 on the trolley is arranged at the upper end of the movable hanger 12, the lifting appliance adopts a 2t electric hoist, a movable support plate 15 is arranged in the middle of the movable hanger, one end of the movable support plate 15 is connected with the movable hanger, and the other end of the movable support plate is lapped at the edge part of the upper end face of the pipe pier 4, so that a temporary transition supporting face of the newly-built pipeline 3 from the movable hanger 12 to the pipe pier 4 is formed.
Specifically, after the pipe is transported to the proper position, the pipe is placed on the buttress through the movable hanger and the lifting appliance, and then the pipe assembly is carried out through the external aligning device. The pipeline welding follows the pipe distribution sequence, and the welding power supply can use the power electricity on the power line nearby or use a self-generating welding machine. For guaranteeing safe construction, require constructor to wear labor protection (safety helmet and safety shoes etc.) during the welding, set up simple and easy welding protection canopy in the crater position simultaneously to prevent to wear the wind influence welding quality, wrap the back-fire relief cloth on closing on the pipeline simultaneously, in order to prevent to heat and the influence of welding time to near pipeline. Because the tunnel is internally provided with water seepage, and is dark and moist, in order to ensure the welding quality and slow down the heat loss due to the low-temperature environment, the preheating range of the pipe orifice is increased to 120mm from the two sides of the groove respectively by 75mm required by the specification, a digital display infrared thermometer is adopted for temperature measurement, the measurement is carried out at the position which is radially 00 mm-120 mm away from the pipe orifice, 8 points on the uniform circumference need to be measured, and the welding of root welding beads is carried out immediately after the preheating is finished. In the welding process, waterproof rubber is paved at the welding position to insulate moisture, in order to ensure the interlayer temperature, the welding of each layer of welding bead must be compact, and the next procedure is carried out immediately after the previous procedure is finished. Before each layer of welding pass is welded, 8 points on the uniform circumference need to be measured, and when the interlayer temperature is lower than the requirement of a welding process specification, a flame heater is adopted to preheat again.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. A pipeline dismantling and installing construction method in a narrow space specifically comprises the following steps according to the construction sequence: construction equipment, transportation and lifting device preparation, pipeline demolish, demolish the transport of pipeline, the transportation of newly-built pipeline, the group of pipeline to and installation and experiment, its characterized in that:
the pipeline which needs to be replaced and passes through the narrow space is laid in the narrow space by adopting the pipe pier, the pipeline needs to be dismantled and laid on the lower layer of one side in the narrow space, and the newly-built pipeline is laid on the upper layer of the pipe pier;
the concrete construction method for dismantling the pipeline comprises the following steps: firstly, flushing the interior of a pipeline to be dismantled by fire water, and carrying out dismantling operation only after the flushing is qualified; then, manually cutting the pipeline to be dismantled in the narrow space into a plurality of sections; then conveying the cut pipeline to a courtyard through a transport trolley, cutting the pipeline into short sections by flame cutting, and hoisting the short sections out of the courtyard by using a hoisting mechanism;
before flame cutting, firstly, the residual water and residual oil in the pipeline must be completely recovered, and the specific recovery method comprises the following steps: slowly jacking one end of the pipeline by using a jack, collecting the other end of the pipeline by using a container, cleaning the pipeline integrally from one end to the other end by using cotton yarns, and adsorbing residual water and residual oil; then, cleaning an anticorrosive coating at the cutting position after the cutting point is determined, forming a skylight at the cutting position, and checking the conditions of residual water and residual oil in the pipeline; finally, detecting whether residual gas in the pipeline meets the firing requirement by using a gas detector, carrying out dismantling operation if the residual gas meets the fire requirement, cleaning the pipeline again according to the flow if the residual gas does not meet the fire requirement, and carrying out flame cutting operation until the residual gas meets the requirement and dry sand is laid on the lower part of a cutting point;
the concrete transportation method of the newly-built pipeline comprises the following steps: the pipeline is transported to an operation platform at a narrow space opening to be stacked, the pipeline transportation and distribution mode of a winch traction trolley is adopted for the pipeline transportation and distribution in the narrow space, and after the pipeline is transported to the installation position, the pipeline is lifted to the installation position on the upper layer of the pipe pier by a lifting device to be paired.
2. The method for removing and installing pipelines in a narrow space according to claim 1, wherein: each section of the pipeline cut off by manual sawing is 30-40 m long, and a rectangular skylight is formed at the cutting position after an anticorrosive coating at the cutting position is cleaned before flame cutting.
3. The method for removing and installing pipelines in a narrow space according to claim 1, wherein: before carrying out the fortune pipe of newly-built pipeline in narrow space, at first lay two parallel tracks in narrow space, the orbital tip extends narrow space mouth be provided with the dolly on the track, the newly-built pipeline of treating the installation is placed on the dolly and is fixed, then transports newly-built pipeline to the installation position through the dolly, the dolly is pull through the haulage rope by the hoist engine that sets up outside the narrow space.
4. The method for removing and installing pipes in a narrow space according to claim 3, wherein: the track is arranged along pedestrian passageway on one side of narrow space, narrow space bottom surface slope is 5% thousandths, fixes the track as the atress point through the pipe mound.
5. The method for removing and installing pipes in a narrow space according to claim 3, wherein: the dolly includes pipeline supporting platform and pipeline fixing clip, the pipeline of building newly is placed on pipeline supporting platform, pipeline fixing clip back-off is in newly-built pipeline top, just pipeline fixing clip both ends are connected with pipeline supporting platform, and the cooperation through pipeline fixing clip and pipeline supporting platform will be newly-built the pipeline and fix and transport on the dolly.
6. The method for removing and installing pipelines in a narrow space according to claim 5, wherein: be provided with the rubber backing plate between newly-built pipeline and the pipeline supporting platform, the rubber backing plate be with newly-built pipeline lower part assorted arc structure, the pipeline fixing clip be with newly-built pipeline upper portion assorted arc structure.
7. The method for removing and installing the pipeline in the narrow space according to any one of claims 1 to 6, wherein: the lifting device comprises a movable hanger arranged above the trolley, one end of the movable hanger is connected with a movable hanger support arranged on the trolley, the other end of the movable hanger is supported on the pipe pier, and a lifting appliance used for lifting a newly-built pipeline on the trolley is arranged at the upper end of the movable hanger.
8. The method for removing and installing pipes in a narrow space according to claim 7, wherein: and a movable support plate is arranged in the middle of the movable hanging bracket, one end of the movable support plate is connected with the movable hanging bracket, and the other end of the movable support plate is lapped at the edge part of the upper end surface of the pipe pier to form a temporary transition supporting surface from the movable hanging bracket to the pipe pier for the newly-built pipeline.
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| CN112411405A (en) * | 2020-11-27 | 2021-02-26 | 深圳市昊诚土木建筑科技有限公司 | Culvert reinforcing method |
| CN113371581B (en) * | 2021-06-02 | 2022-04-19 | 中国长江电力股份有限公司 | Hoisting and overhauling method for 500kV welded GIL vertical section pipeline |
| CN113998578A (en) * | 2021-11-04 | 2022-02-01 | 中国十七冶集团有限公司 | Large pipe installation auxiliary method in limited space |
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| CN208982789U (en) * | 2018-08-31 | 2019-06-14 | 云南省建设投资控股集团有限公司 | A kind of underground pipe gallery feedwater piping buttress |
| CN210313200U (en) * | 2019-05-07 | 2020-04-14 | 中国水利水电第十四工程局有限公司 | Hoisting system for installing shaft pressure steel pipe |
| CN110748742A (en) * | 2019-10-09 | 2020-02-04 | 南京晨光复合管工程有限公司 | Online repair technology for inserted pipeline in RTP pipe |
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