CN111473162B - Threading construction method for large-diameter long-pipe-section circulating water pipeline - Google Patents
Threading construction method for large-diameter long-pipe-section circulating water pipeline Download PDFInfo
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- CN111473162B CN111473162B CN202010294475.1A CN202010294475A CN111473162B CN 111473162 B CN111473162 B CN 111473162B CN 202010294475 A CN202010294475 A CN 202010294475A CN 111473162 B CN111473162 B CN 111473162B
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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
Abstract
The invention provides a large-diameter long-pipe-section circulating water pipeline penetrating construction method, which comprises the steps of cutting and blanking; excavating a welding pit, and hoisting a steel outer casing into a circulating water pipe ditch; a support roller device is fixed on the outer wall of the front end of the first section of circulating water pipeline; the first section of branch circulating water pipeline is hoisted into the circulating water pipeline ditch, the front end of the first section of branch circulating water pipeline is inserted into the steel outer sleeve, the front end of the first section of branch circulating water pipeline is supported by using the idler wheels, and the first section of branch circulating water pipeline is pushed to enter the steel outer sleeve; hoisting a second section of sub-circulating water pipeline into a circulating water pipeline ditch and butt-welding the second section of sub-circulating water pipeline with the first section of sub-circulating water pipeline, and then pushing the second section of sub-circulating water pipeline into the steel outer sleeve; the remaining sub-circulating water pipes are installed in place according to the method of C3. The invention replaces sliding friction with rolling friction, can effectively avoid the damage of the outer anticorrosive coating of the circulating water pipeline, and has small resistance of rolling friction and more labor-saving construction.
Description
Technical Field
The invention relates to the field of construction of circulating water pipelines, in particular to a construction method for threading and installing a large-diameter long-pipe-section circulating water pipeline.
Background
In special areas such as collapsible loess, expansive soil and the like, according to the current design specifications, a steel outer sleeve and an inspection well are required to be arranged for a buried pipeline within 5 meters of a building foundation. In a certain refuse incineration power generation construction project, two
The underground circulating water pipelines are respectively arranged at the main plant section
The inspection well comprises a steel outer sleeve and four inspection wells, wherein the lengths of the steel outer sleeve between the inspection wells are 42 meters, 42 meters and 30 meters respectively.
Two common construction methods are provided for the large-diameter long-pipe-section circulating water pipeline to be provided with the steel outer sleeve in a penetrating manner, wherein the common method comprises the following steps: firstly, respectively combining a circulating water pipeline and a steel outer sleeve on the ground, then dragging the circulating water pipeline into the steel outer sleeve by adopting a crane and a winch, and finally lifting and hanging by adopting two cranes to put the circulating water pipeline with the steel outer sleeve into position. The method has the following disadvantages: the circulating water pipeline is penetrated and installed with a steel outer sleeve in a large area, namely the length of the combined circulating water pipeline plus the steel outer sleeve is the sum of the length of the steel outer sleeve and the length of the combined circulating water pipeline; the second disadvantage is that: when the circulating water pipeline drags into the steel outer sleeve, the outer anticorrosive coating of the circulating water pipeline is very easy to damage, and the damage cannot be compensated and prevented; the third disadvantage is that: the circulating water pipeline penetrating the steel outer sleeve is long in length and heavy in weight, two cranes are required to lift and hang when the steel outer sleeve is put into place, the machine cost and the construction cost are increased, and the double-crane lifting and hanging belongs to a construction project with high risk, so that the safety risk is increased.
A second common method comprises the following steps: firstly, respectively combining a circulating water pipeline and a steel outer sleeve on the ground, then hoisting the steel outer sleeve to a sewer in place by a crane, hoisting the circulating water pipeline to the sewer by the crane, and dragging the circulating water pipeline into the steel outer sleeve by matching with a winch. The method has the following disadvantages: the winch is not easy to arrange in the circulating water pipe ditch, and the ground anchor has larger difficulty in arrangement; the second disadvantage is that: when the circulating water pipeline drags into the steel outer sleeve, the outer anticorrosive coating of the circulating water pipeline is very easy to damage, and the damage cannot be compensated and prevented; the third disadvantage is that: the circulating water pipe ditch needs to overbreak the working surface of the sewer of the long pipe section circulating water pipeline formed by combination at the penetrating side, thus increasing the construction cost. From the analysis, it can be seen that the two common construction methods for the circulating water pipeline to wear the steel outer sleeve have the disadvantages of high construction difficulty, high construction cost and high safety risk; meanwhile, the outer anticorrosive layer of the circulating water pipeline is extremely easy to damage in the wearing process, and the damage cannot be compensated and prevented, so that the construction quality cannot be guaranteed, and a large quality hidden danger is left.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a threading construction method for a large-diameter long-pipe-section circulating water pipeline, which can reduce construction difficulty, reduce construction safety risk and avoid damage of an outer anticorrosive layer of the circulating water pipeline.
The technical scheme adopted by the invention for solving the technical problems is as follows: the construction method for the large-diameter long-pipe-section circulating water pipeline comprises
A. Cutting the raw materials of the circulating water pipeline according to the distance between two adjacent inspection wells to obtain a multi-section circulating water pipeline;
B. digging a welding pit in the circulating water pipe ditch, and hoisting a steel outer casing into the circulating water pipe ditch;
C. construction of a circulating water pipeline:
c1, fixing a supporting roller device on the outer wall of the front end of the first section of the circulating water pipeline, wherein the supporting roller device is provided with a rotatable roller;
c2, hoisting the first section of branch circulating water pipeline into a circulating water pipeline ditch, inserting the front end of the first section of branch circulating water pipeline into a steel outer sleeve, supporting the front end of the first section of branch circulating water pipeline by using a roller, hoisting the rear end of the first section of branch circulating water pipeline to enable a space to be reserved between the outer wall of the first section of branch circulating water pipeline and the inner wall of the steel outer sleeve, pushing the first section of branch circulating water pipeline to enter the steel outer sleeve, and reserving a welding section outside the steel outer sleeve at the rear end of the first section of branch circulating water pipeline;
c3, hoisting the second section of sub-circulating water pipeline into a circulating water pipeline ditch and butt-welding the second section of sub-circulating water pipeline with the welding section of the first section of sub-circulating water pipeline, pushing the second section of sub-circulating water pipeline into the steel outer sleeve, and reserving the welding section outside the steel outer sleeve at the rear end of the second section of sub-circulating water pipeline;
c4, installing the rest branch circulating water pipeline in place according to the method of C3, and detaching the supporting roller device.
Further, in the step A, cutting the raw material of the steel outer sleeve according to the distance between two adjacent inspection wells to obtain a multi-section steel-divided outer sleeve;
and B, digging a plurality of welding pits in the circulating water pipe ditch, hoisting each section of steel-divided outer sleeve into the circulating water pipe ditch, and welding two adjacent sections of steel-divided outer sleeves at the welding pits in a butt joint mode to obtain the steel-divided outer sleeves.
Further, in the step C2, the first section of the sub-circulating water pipeline is hoisted into the circulating water pipeline ditch by using a crane, and the hoisting point is positioned in the middle of the first section of the sub-circulating water pipeline; inserting the front end of the first section of sub-circulating water pipeline into the steel outer sleeve, using a sleeper to cushion the rear end of the first section of sub-circulating water pipeline, moving a lifting point to the rear end of the first section of sub-circulating water pipeline, lifting the rear end of the first section of sub-circulating water pipeline by using a crane and pushing the first section of sub-circulating water pipeline into the steel outer sleeve, and finally using the sleeper to cushion the welding section of the first section of sub-circulating water pipeline.
Further, in step C3, after the second sub-circulating water pipe is hung into the circulating water pipe trench, both ends of the second sub-circulating water pipe are padded up by using a sleeper and then welded.
Furthermore, the supporting roller device comprises an inner clamping plate and an outer clamping plate, one end of the inner clamping plate is connected with one end of the outer clamping plate through a connecting plate, and the inner clamping plate, the outer clamping plate and the connecting plate enclose a U-shaped clamping cavity; the inner clamping plate is provided with a fastener, and the roller is rotatably arranged on the outer side surface of the outer clamping plate;
in step C1, the pipe wall at the front end of the first section of the sub-circulating water pipe is inserted into the clamping cavity, and the supporting roller device is fixed on the first section of the sub-circulating water pipe by using a fastener.
Further, the lateral surface of interior splint is provided with the reinforcing plate.
Further, the fastener is a screw, and the screw is in threaded fit with the inner clamping plate;
in the step C1, the screw is rotated to enable the screw to be in compressed contact with the first section of the branch circulating water pipeline, and the outer clamping plate can be pulled to be tightly attached to the outer wall of the first section of the branch circulating water pipeline.
Further, the lateral surface of outer splint is provided with a pair of mounting panel that is parallel to each other, is provided with the installation axle between two mounting panels, the gyro wheel sets up on the installation axle.
Further, the roller is a bearing.
Further, the support roller device comprises a load-bearing roller device and two guide roller devices, in step C1, the load-bearing roller device is fixed at the bottom of the front end of the first section of the sub-circulating water pipeline, and the two guide roller devices are fixed at two sides of the load-bearing roller device.
The invention has the beneficial effects that: divide into the short branch circulating water pipeline of multistage length with circulating water pipeline, every section divides circulating water pipeline's weight lighter, reduces and lifts by crane the degree of difficulty, and miniature hoist just can satisfy the requirement, improves the construction security. During the poling, the front end at first section branch circulating water pipeline has set up the supporting roller device, and the supporting roller device supports the front end of first section branch circulating water pipeline, avoids first section branch circulating water pipeline and steel outer tube direct contact, and the gyro wheel rotates when pushing branch circulating water pipeline into the steel outer tube to rolling friction replaces sliding friction, can effectively avoid the outer anticorrosive coating damage of circulating water pipeline, and in addition, rolling friction's resistance is little, and it is more laborsaving to be under construction.
Drawings
FIG. 1 is a schematic top view of a circulating water trench;
FIG. 2 is a schematic construction diagram of a steel outer sleeve;
FIG. 3 is a construction schematic diagram of a first section of a branch circulating water pipeline;
FIG. 4 is a construction schematic diagram of the rest sub-circulating water pipes;
FIG. 5 is a schematic front view of the support roller assembly;
FIG. 6 is a side schematic view of the support roller assembly;
FIG. 7 is a schematic view of the mounting of the support roller assembly;
reference numerals: 10-supporting the roller device; 11-a roller; 12-inner splints; 13-outer splint; 14-a connecting plate; 15-a clamping cavity; 16-a fastener; 17-a reinforcing plate; 18-mounting a plate; 19-mounting the shaft; 20-branch circulating water pipeline; 30-manufacturing an outer sleeve by steel; 40, an inspection well; 41-circulating water pipe ditch; 42-a weld crater; 50-sleeper.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
The invention relates to a construction method for threading and installing a large-diameter long pipe section circulating water pipeline, which comprises the following steps of
A. And cutting the raw materials of the circulating water pipeline according to the distance between two adjacent inspection wells 40 to obtain the multi-section circulating water pipeline 20. And cutting the raw material of the steel outer sleeve according to the distance between two adjacent inspection wells 40 to obtain the multi-section steel outer sleeve 30. The cutting is carried out on the ground, and after the cutting is finished, welding grooves are processed at the end parts of the branch circulating water pipeline 20 and the branch steel outer sleeve 30. The distance between two adjacent inspection wells 40 is longer, if circulating water pipeline and steel outer tube adopt a holistic pipeline, length and weight are all bigger, the construction degree of difficulty is big, it is higher to the requirement of lifting by crane equipment, therefore, cut many less minute circulating water pipeline 20 of length and branch steel system outer tube 30 respectively at circulating water pipeline former pipe and steel outer tube former pipe, every minute circulating water pipeline 20 is less with the weight of branch steel system outer tube 30, adopt general small crane just can satisfy the requirement of lifting by crane, thereby reduce the construction degree of difficulty, be favorable to guaranteeing construction safety. The length and number of the branch circulating water pipe 20 and the branch steel outer casing 30 are determined according to the distance between two adjacent inspection wells 40 and the actual construction conditions.
B. A welding pit 42 is dug in the circulating water pipe ditch 41, and a steel outer casing pipe is hung into the circulating water pipe ditch 41. The circulating water pipe ditch 41 is used for burying a circulating water pipe, and welding among the multiple sections of branch circulating water pipes 20 and welding among the multiple sections of branch steel outer sleeves 30 are carried out at the welding pit 42, so that enough operating space is ensured.
Specifically, as shown in fig. 1 and 2, a plurality of welding pits 42 are formed in the circulation water pipe trench 41, the distance between two adjacent welding pits 42 is equal to the length of the partial steel outer sleeve 30, each partial steel outer sleeve 30 is hung into the circulation water pipe trench 41, and the two adjacent partial steel outer sleeves 30 are welded to each other at the welding pits 42, so as to obtain the steel outer sleeve.
C. Construction of a circulating water pipeline:
c1, fixing a supporting roller device 10 on the outer wall of the front end of the first section circulating water pipeline 20, wherein the supporting roller device 10 is provided with a rotatable roller 11. Support roller device 10 is used for separating circulating water pipeline and steel outer tube, avoids circulating water pipeline and steel outer tube direct contact, when penetrating circulating water pipeline in the steel outer tube like this, just can prevent the anticorrosive coating damage of circulating water pipeline outer wall. Optionally, a first section of circulating water pipeline 20 is used as the first section of circulating water pipeline 20, and any end of the first section of circulating water pipeline 20 is used as the front end of the first section of circulating water pipeline 20, and the other end is the back end of the first section of circulating water pipeline 20.
Specifically, as shown in fig. 5 and 6, the support roller device 10 includes an inner clamp plate 12 and an outer clamp plate 13, one end of the inner clamp plate 12 is connected to one end of the outer clamp plate 13 through a connecting plate 14, and the inner clamp plate 12, the outer clamp plate 13 and the connecting plate 14 enclose a U-shaped clamping cavity 15; the inner clamping plate 12 is provided with a fastener 16, and the roller 11 is rotatably arranged on the outer side surface of the outer clamping plate 13.
The inner clamping plate 12 and the outer clamping plate 13 are long-strip-shaped plates with small width, and the inner clamping plate 12, the connecting plate 14 and the outer clamping plate 13 can be welded and connected. The outer side of the outer clamping plate 13, i.e. the side of the outer clamping plate 13 facing away from the clamping chamber 15. During construction, the bottom pipe wall at the front end of the first section of circulating water pipeline 20 is inserted into the clamping cavity 15, the supporting roller device 10 is fixed on the first section of circulating water pipeline 20 by the fastening piece 16, at the moment, the inner clamping plate 12 is located inside the first section of circulating water pipeline 20, the outer clamping plate 13 and the rollers 11 are located outside the first section of circulating water pipeline 20, and when the first section of circulating water pipeline 20 is inserted into the steel outer sleeve, the front end of the first section of circulating water pipeline 20 can be supported by the supporting roller device 10.
The lateral surface of interior splint 12 is provided with reinforcing plate 17, reinforcing plate 17 and interior splint 12 welded connection to the structural strength of reinforcing interior splint 12.
The fastener 16 can be a jack, and when the clamping device is used, the jack is located between the inner side wall of the first section circulating water pipeline 20 and the inner clamping plate 12, and the outer clamping plate 13 can be pulled to be tightly attached to the outer side wall of the first section circulating water pipeline 20 by the extension of the jack. Preferably, fastener 16 is the screw, and screw and interior splint 12 screw-thread fit, and rotatory screw makes screw and first section circulating water pipeline 20 compress tightly the contact, can stimulate outer splint 13 and paste the outer wall of tight first section circulating water pipeline 20, and it is more convenient to operate.
The lateral surface of outer splint 13 is provided with a pair of mounting panel 18 that are parallel to each other, is provided with installation axle 19 between two mounting panels 18, gyro wheel 11 sets up on installation axle 19. Installation axle 19 can with mounting panel 18 normal running fit, in addition, installation axle 19 also can with mounting panel 18 fixed coordination, gyro wheel 11 and installation axle 19 normal running fit, guarantee that gyro wheel 11 can the free rotation can.
The idler wheel 11 is a bearing, particularly a NUTR series bearing, and can also be a stainless steel wheel, and the circumferential surface of the wheel can be set to be a cambered surface, so that the contact area between the idler wheel and the steel outer sleeve is increased, and the moving stability is improved.
The supporting roller device 10 may be one, which is disposed at the bottom of the first section of circulating water pipeline 20, but in order to improve the stability of the circulating water pipeline during pipe penetration, as a preferred embodiment: as shown in fig. 7, the support roller device 10 includes a load-bearing roller device and two guide roller devices, wherein the load-bearing roller device is fixed at the bottom of the front end of the first section of the circulating water pipeline 20 during construction, and the two guide roller devices are fixed at two sides of the load-bearing roller device. The bearing roller device mainly bears most of the weight of the circulating water pipeline, the guide roller devices are symmetrically arranged on two sides of the bearing roller device, the guide effect is achieved, the circulating water pipeline is prevented from being deviated left and right when the pipe penetrating device moves, and the stability of the circulating water pipeline is guaranteed.
Since the load bearing roller device is the main load bearing device, two bearings are provided on the mounting shaft 19 of the load bearing roller device to improve the load bearing capacity, and one bearing is provided on the mounting shaft 19 of the guide roller device.
And C2, hanging the first section of circulating water pipeline 20 into the circulating water pipe ditch 41, specifically, hanging the first section of circulating water pipeline 20 into the circulating water pipe ditch 41 by using a crane, wherein a hanging point is positioned in the middle of the first section of circulating water pipeline 20, so that the first section of circulating water pipeline 20 is kept balanced during hanging.
The front end of the first section of circulating water pipeline 20 is inserted into the steel outer sleeve, the position of the first section of circulating water pipeline 20 is adjusted, the supporting roller device 10 is located at the bottom of the first section of circulating water pipeline 20, the roller 11 is in contact with the inner wall of the steel outer sleeve, and the roller 11 is used for supporting the front end of the first section of circulating water pipeline 20.
Then, the rear end of the first section of circulating water pipeline 20 is lifted, so that a space exists between the outer wall of the first section of circulating water pipeline 20 and the inner wall of the steel outer sleeve, the outer wall of the first section of circulating water pipeline 20 is prevented from contacting the inner wall of the steel outer sleeve, then the first section of circulating water pipeline 20 is pushed to enter the steel outer sleeve, and a welding section outside the steel outer sleeve is reserved at the rear end of the first section of circulating water pipeline 20.
Specifically, after the front end of the first section of circulating water pipeline 20 is inserted into the steel outer sleeve, the sleeper 50 is used for lifting the rear end of the first section of circulating water pipeline 20, so that the first section of circulating water pipeline 20 is kept stable, that is, the lifting point can be moved to the rear end of the first section of circulating water pipeline 20, then the crane is used for lifting the rear end of the first section of circulating water pipeline 20 and pushing the first section of circulating water pipeline 20 to enter the steel outer sleeve, in the process, the first section of circulating water pipeline 20 is not in contact with the steel outer sleeve, the roller 11 rotates and rolls along the axial direction of the steel outer sleeve, so that the sliding friction between the circulating water pipeline and the steel outer sleeve is converted into rolling friction, the friction resistance is reduced, the labor is saved, and the corrosion-resistant layer on the outer wall of the first section of circulating water pipeline 20 is prevented from being worn. Finally, the welded section of the first section of circulating water pipeline 20 is cushioned by using the sleepers 50, so that the first section of circulating water pipeline 20 is kept stable, and a lifting point is removed and the next section of circulating water pipeline 20 is lifted into the circulating water pipe ditch 41.
C3, as shown in fig. 4, hanging the second section of circulating water pipeline 20 into a circulating water pipe ditch 41, using a sleeper 50 to cushion up two ends of the second section of circulating water pipeline 20, so that the second section of circulating water pipeline 20 is kept stable, then butt-welding the second section of circulating water pipeline 20 and the welding section of the first section of circulating water pipeline 20, then pushing the second section of circulating water pipeline 20 into a steel outer sleeve, and reserving a welding section outside the steel outer sleeve at the rear end of the second section of circulating water pipeline 20;
c4, installing the remaining divided circulating water pipe 20 in place according to the method of C3. After the pipe penetration is completed, the front end of the first section of circulating water pipeline 20 is lifted, and the support roller device 10 is detached.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The construction method for penetrating and installing the large-diameter long-pipe-section circulating water pipeline is characterized by comprising the following steps
A. Cutting the raw materials of the circulating water pipeline according to the distance between two adjacent inspection wells (40) to obtain a multi-section branch circulating water pipeline (20);
B. digging a welding pit (42) in the circulating water pipe ditch (41), and hoisting a steel outer sleeve into the circulating water pipe ditch (41);
C. construction of a circulating water pipeline:
c1, fixing a supporting roller device (10) on the outer wall of the front end of the first section of the circulating water pipeline (20), wherein the supporting roller device (10) is provided with a rotatable roller (11);
c2, hanging the first section of branch circulating water pipeline (20) into a circulating water pipeline ditch (41), inserting the front end of the first section of branch circulating water pipeline (20) into a steel outer sleeve, supporting the front end of the first section of branch circulating water pipeline (20) by using a roller (11), then hanging the rear end of the first section of branch circulating water pipeline (20) to ensure that a space exists between the outer wall of the first section of branch circulating water pipeline (20) and the inner wall of the steel outer sleeve, then pushing the first section of branch circulating water pipeline (20) to enter the steel outer sleeve, and reserving a welding section positioned outside the steel outer sleeve at the rear end of the first section of branch circulating water pipeline (20);
c3, hanging the second section of branch circulating water pipe (20) into a circulating water pipe ditch (41) and butt-welding the second section of branch circulating water pipe with the welding section of the first section of branch circulating water pipe (20), then pushing the second section of branch circulating water pipe (20) into a steel outer sleeve, and reserving the welding section outside the steel outer sleeve at the rear end of the second section of branch circulating water pipe (20);
c4, installing the rest branch circulating water pipeline (20) in place according to the method of C3, and detaching the supporting roller device (10).
2. The threading construction method of the large-diameter long pipe section circulating water pipeline as claimed in claim 1, wherein:
in the step A, cutting the raw material of the steel outer sleeve according to the distance between two adjacent inspection wells (40) to obtain a multi-section steel-divided outer sleeve (30);
and step B, digging a plurality of welding pits (42) in the circulating water pipe ditch (41), hanging each section of the steel-divided outer sleeve (30) into the circulating water pipe ditch (41), and butt-welding two adjacent sections of the steel-divided outer sleeves (30) at the welding pits (42) to obtain the steel-divided outer sleeves.
3. The threading construction method of the large-diameter long pipe section circulating water pipeline as claimed in claim 1 or 2, characterized in that: in the step C2, the first section of branch circulating water pipeline (20) is hoisted into the circulating water pipeline ditch (41) by a crane, and the hoisting point is positioned in the middle of the first section of branch circulating water pipeline (20); after the front end of the first section of branch circulating water pipeline (20) is inserted into the steel outer sleeve, the rear end of the first section of branch circulating water pipeline (20) is cushioned by using a sleeper (50), then a lifting point is moved to the rear end of the first section of branch circulating water pipeline (20), then the rear end of the first section of branch circulating water pipeline (20) is lifted by using a crane and pushes the first section of branch circulating water pipeline (20) to enter the steel outer sleeve, and finally the welded section of the first section of branch circulating water pipeline (20) is cushioned by using the sleeper (50).
4. The large-diameter long pipe section circulating water pipe penetrating construction method as claimed in claim 3, wherein: and step C3, after the second section of the circulating water pipeline (20) is hung into the circulating water pipeline ditch (41), two ends of the second section of the circulating water pipeline (20) are cushioned by using sleepers (50), and then the second section of the circulating water pipeline is welded.
5. The threading construction method of the large-diameter long pipe section circulating water pipeline as claimed in claim 1, wherein: the supporting roller device (10) comprises an inner clamping plate (12) and an outer clamping plate (13), one end of the inner clamping plate (12) is connected with one end of the outer clamping plate (13) through a connecting plate (14), and the inner clamping plate (12), the outer clamping plate (13) and the connecting plate (14) enclose a U-shaped clamping cavity (15); the inner clamping plate (12) is provided with a fastener (16), and the roller (11) is rotatably arranged on the outer side surface of the outer clamping plate (13);
in the step C1, the pipe wall at the front end of the first section of the branch circulating water pipe (20) is inserted into the clamping cavity (15), and the supporting roller device (10) is fixed on the first section of the branch circulating water pipe (20) by using a fastener (16).
6. The large-diameter long pipe section circulating water pipe penetrating construction method as claimed in claim 5, wherein: and a reinforcing plate (17) is arranged on the outer side surface of the inner clamping plate (12).
7. The large-diameter long pipe section circulating water pipe penetrating construction method as claimed in claim 5, wherein: the fastener (16) is a screw, and the screw is in threaded fit with the inner clamping plate (12);
in the step C1, the screw is rotated to enable the screw to be in compressed contact with the first section of the branch circulating water pipeline (20), and the outer clamping plate (13) can be pulled to be tightly attached to the outer wall of the first section of the branch circulating water pipeline (20).
8. The large-diameter long pipe section circulating water pipe penetrating construction method as claimed in claim 5, wherein: the lateral surface of outer splint (13) is provided with a pair of mounting panel (18) that are parallel to each other, is provided with installation axle (19) between two mounting panels (18), gyro wheel (11) set up on installation axle (19).
9. The large-diameter long pipe section circulating water pipe penetrating construction method as claimed in claim 8, wherein: the roller (11) is a bearing.
10. The threading construction method of the large-diameter long pipe section circulating water pipeline as claimed in claim 1, wherein: the support roller device (10) comprises a bearing roller device and two guide roller devices, in the step C1, the bearing roller device is fixed at the bottom of the front end of the first section of the sub-circulating water pipeline (20), and the two guide roller devices are fixed at two sides of the bearing roller device.
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| CN106931238A (en) * | 2017-03-29 | 2017-07-07 | 中国十九冶集团有限公司 | Pipeline sleeve-penetrating constructing device and its construction method |
| CN208311645U (en) * | 2018-04-18 | 2019-01-01 | 中国建筑第六工程局有限公司 | Laying apparatu for inner lining construction pipe in long range outer tube |
| CN109323049A (en) * | 2018-11-22 | 2019-02-12 | 中水电第十工程局（郑州）有限公司 | Bushing type aqueduct and its construction method of installation applied to through bridge |
| CN109667986A (en) * | 2019-01-14 | 2019-04-23 | 海洋石油工程股份有限公司 | Construction technology when marine double-layer submarine pipeline is laid in production line |
| CN110735969A (en) * | 2019-09-11 | 2020-01-31 | 北京翔鲲水务建设有限公司 | tunnel penetrating steel pipe installation method and tunnel pulley arrangement structure |
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| CN111473162A (en) | 2020-07-31 |
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