CN113346401B - Precise positioning device for tail end of deep pipeline and construction method thereof - Google Patents
Precise positioning device for tail end of deep pipeline and construction method thereof Download PDFInfo
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- CN113346401B CN113346401B CN202011060482.1A CN202011060482A CN113346401B CN 113346401 B CN113346401 B CN 113346401B CN 202011060482 A CN202011060482 A CN 202011060482A CN 113346401 B CN113346401 B CN 113346401B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/06—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for laying cables, e.g. laying apparatus on vehicle
- H02G1/08—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for laying cables, e.g. laying apparatus on vehicle through tubing or conduit, e.g. rod or draw wire for pushing or pulling
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G9/00—Installations of electric cables or lines in or on the ground or water
- H02G9/06—Installations of electric cables or lines in or on the ground or water in underground tubes or conduits; Tubes or conduits therefor
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Abstract
The invention discloses a device for accurately positioning the tail end of a deep pipeline and a construction method thereof, wherein the positioning device comprises a positioning piece and a sleeve which is detachably connected in the positioning piece, and the positioning piece comprises a positioning bracket which is of a frame structure and a positioning plate which is detachably connected in the positioning bracket; the positioning support comprises upright posts which are arranged in a rectangular shape, a cross rod which is connected to the long direction of the upright posts and a connecting rod which is connected to the short direction of the upright posts, and the upright posts, the cross rod and the connecting rod can be detachably connected; the invention is beneficial to the unit installation of pipelines with different specialties and sizes by arranging the positioning piece, and the sleeve is further divided into a vertical section, a horizontal section and an arc section according to the trend of the pipeline, so that the installation requirements of different pipelines can be met as much as possible; the installation position of the pipeline can be determined by deepening the position of the pipeline to be installed in advance and numbering the sleeves in advance; through the setting of locating support, be convenient for categorised and fixed pipeline, and do benefit to and adjust according to on-the-spot actual conditions.
Description
Technical Field
The invention belongs to the field of building construction, and particularly relates to a device for accurately positioning the tail end of a deep pipeline and a construction method thereof.
Background
With the rapid development of the building industry, the requirements on the aspects of building aesthetics, safety, functionality, economic benefit, energy conservation, environmental protection and the like are higher and higher; underground buried pipelines are important links in the process of electrical installation.
The electric pipeline construction in the past is directly under construction according to design institute's drawing, and the pipeline is alternately in disorder, and the collision is serious between each specialty, leads to the scene to coordinate repeatedly to tear open and change, not only wastes time and energy, still influences the aesthetic property, more leaves huge hidden danger for later stage cable threading work. In places such as amusement parks, movie cities and the like, the building structure is complex, the space is narrow, the variety of electric systems is various, the pipelines are dense, and the requirements on the concealment and the attractiveness of the installation of the electric pipelines are extremely strict. In the construction process, the cable sleeve needs to be buried underground for construction, and the problems of crossed and disordered pipelines, repeated coordination and dismantling and modification and the like in a construction site need to be solved.
Disclosure of Invention
The invention provides a device for accurately positioning the tail end of a deep pipeline and a construction method thereof, which are used for solving the technical problems of convenient installation and ordered construction of the pipeline, the targeted design of the extending tail end of the pipeline and the like.
In order to achieve the purpose, the invention adopts the following technical scheme:
a device for accurately positioning the tail end of a deep pipeline comprises a positioning piece and a sleeve detachably connected in the positioning piece, wherein the positioning piece comprises a positioning bracket in a frame structure and a positioning plate detachably connected in the positioning bracket; the positioning support comprises upright posts which are arranged in a rectangular shape, a cross rod which is connected to the long direction of the upright posts and a connecting rod which is connected to the short direction of the upright posts, and the upright posts, the cross rod and the connecting rod can be detachably connected;
the positioning plate is connected to the rectangular frame formed by the cross rods and the connecting rods and comprises a positioning plate body and positioning holes arranged in the positioning plate body; the inner diameter of the positioning hole is adapted to the outer diameter of the sleeve, and the inner diameter of the sleeve is adapted to the outer diameter of the pipeline;
the casing pipe comprises a vertical section connected to the positioning piece, and an arc-shaped section and a horizontal section which are connected below the vertical section and buried underground.
Furthermore, a rectangular frame formed by the transverse rods and the connecting rods in the positioning support is at least divided into an upper layer and a lower layer, at least the opposite transverse rods or the opposite connecting rods are L-shaped pieces, and the width of the transverse parts of the L-shaped pieces is adapted to the lap joint width of the positioning plate.
Furthermore, the positioning support is fixed in the soil layer for at least 1 m, and the periphery of the upright post is fixed by 200mm by C20 concrete.
Furthermore, the tail end of the top of the vertical section of the sleeve is provided with a label or is connected with a tag, and the top of the vertical section extends out of the designed ground elevation by at least 200 mm.
Further, the construction method of the device for accurately positioning the tail end of the deep pipeline comprises the following specific steps:
the method comprises the following steps of firstly, comprehensively arranging underground pipelines by using a BIM technology, determining the trend, the elevation and the pipeline outlet pipe position of the pipelines, and completing the deepening design of the underground buried sleeve; according to a construction drawing, a BIM technology is applied to model construction of distribution boxes, control boxes, tail end equipment and sleeve routes, arrangement adjustment is carried out by integrating related specialties, and the accurate positions of the equipment and the sleeve extending out of the ground and the route trend and elevation of the sleeve under the ground are determined; when the sleeve is connected, the inner surface and the outer surface of a bell socket of a connecting pipe section are coated with adhesive, and a joint is quickly bell and spigot before glue is dried to form a continuous pipeline;
secondly, manufacturing a tube bank fixing plate and a support according to the tube outlet position and the number of tube bank sleeves determined by a deepening design when the sleeves are led out of a terrace or a floor slab, so that the tube bank position is accurate, the spacing is accurate, and the sleeves are vertically installed; ID numbering is carried out on each sleeve according to the deepening design, and numbered hanging tags or marks are arranged at the gateway positions of the starting end and the terminal end of each sleeve, so that accurate cable threading in the later period is ensured;
thirdly, counting the required casings and elbows of various specifications according to the deepening design, wherein the inner and outer wall surfaces of the casings are smooth, have no cracks, obvious scratches and depressions, have uniform colors, and the pipe ends are flush, smooth and have no burrs; the related adhesive glue, cutting equipment, a fixing clamp for horizontally laying a pipeline, a vertically fixed bracket and the like are completely prepared;
measuring and excavating the field according to the sleeve elevation designed by the deepening drawing; the pipelines in the area are dense and the coverage area is wide, and the whole area is excavated to be 100mm below the designed elevation; if the pipeline is a local pipeline, locally excavating a groove; paving a medium-coarse sand layer with the thickness of 100mm below the design elevation of the casing pipe at the bottommost layer, and tamping the foundation below the medium-coarse sand layer; then, burying the underground part of the sleeve;
step five, arranging a single or a plurality of layers of the applied sleeves in parallel to form a pipe row, and installing and fixing pipe clamps when the pipe row is laid; the pipe clamp is a hard PVC interlocking clamping sleeve assembled in a factory, and the size of the pipe clamp is matched with the size of the sleeve, the distance between the sleeves and the outdoor temperature; the number of the fixed pipe clamps is not less than 4 per 6 meters of the casing pipe; in addition, the pipe bank of the cable well is arranged, and when the sleeve is laid, the drainage slope is arranged towards the cable well, and the slope cannot be lower than 0.2%. The vertical pipe section is connected with the horizontal pipe section by an elbow;
step six, manufacturing a positioning piece, drilling holes in the positioning plate according to the size of the sleeve and the distance between the sleeves, and keeping the hole diameter larger than the outer diameter of the sleeve by 2 mm; the positioning bracket is manufactured according to the detailed node diagram, firstly a door-shaped bracket or a square bracket is manufactured, and the positioning plate is horizontally connected to form a planar rectangular outer frame according to the size of the positioning plate, wherein the rectangular outer frame is used for supporting and connecting the positioning plate; four corners of the outer frame are vertically connected with four upright posts to form a system fixed with the ground; in addition, the positioning support is fixed in the soil layer for at least 1 meter, the periphery of the upright post is fixed by 200mm by C20 concrete, and the fixing point positions are increased or decreased according to the buried depth of the sleeve;
step seven, according to the position of the pipeline, after the positioning piece is manufactured, measuring the position of the vertical outlet pipe through coordinates, and calibrating the position of the positioning piece; then arranging a sleeve to enable the vertical pipe section of the sleeve to penetrate through the positioning hole in the positioning plate body; the length of the vertical pipe section is reserved according to the height of 200mm higher than the final finished surface;
step eight, numbering and marking the sleeves in time in the laying process, marking the middle parts of the pipe sections except for the starting end and the terminal end, and particularly numbering and marking the position of a port of the pipe sections with construction pause or interruption;
fixing a fixed pipe clamp of the horizontally laid casing pipe with a soil layer, and monitoring the displacement amount in the backfilling process; after the first layer of casing is laid and installed, manually backfilling by using medium coarse sand, and tamping; repeating the above processes every laying one layer; after the last layer of casing pipe is laid, manually backfilling coarse sand in 100mm above the casing pipe, and manually tamping; and in the range of 0.7m above the top of the pipe, manual backfilling is required, and mechanical bulldozing backfilling is strictly forbidden.
Further, when the sleeve is buried in the step four, the buried depth of the sleeve should meet the following requirements: unless otherwise stated, when the sleeve passes through the equidirectional laying roadway, the length from the top of the sleeve to the road surface is not less than 0.7m, and when the sleeve passes through a sidewalk and a green belt, the length is not less than 0.5 m; when the casings of multiple systems are laid in layers according to the system types, the minimum distance between the casings of the same service type is 20mm, and the minimum distance between the casings of power and signals is 300 mm.
Furthermore, when the underground construction is carried out, except for the pile foundation, most reference objects such as a structural bottom plate, a building floor, a wall body, a beam column and the like are not built, and the field measurement of control lines such as an axis shaft network and the like is not obvious; and (3) carrying out measurement and construction while measuring the elevation and the coordinate of the casing by using a total station, marking by using a flag after the measuring point is finished, and marking the route connecting line of the casing in advance by using lime powder.
Further, the sleeve for construction needs to be preprocessed and preprocessed, a steel saw or a sleeve cutting machine is adopted to cut the pipe, and after the pipe is cut, a reamer or abrasive paper is used to remove all chips and burrs from the inner edge and the outer edge of the cut; cleaning the surface of the spigot and the inner surface area of the bell and spigot, and wiping the spigot and the inner surface area by using clean lint-free cloth dipped with primer to remove stains and grease and soften the surface; coating a thin layer of solvent-free hydrosol on the inner surface of the bell and spigot; to ensure that no solvent accumulation occurs at the root of the socket, and then to apply glue evenly to the outer surface of the spigot.
Further, for the connection of the sleeve, the joint is quickly inserted and connected to a specified depth before the glue is dried, and then the joint is rotated for a quarter of a circle so as to be evenly smeared, and the joint is fixed at the position for at least thirty seconds without moving;
wiping off redundant glue extruded from the interior of the joint on the outer side of the joint, and maintaining the joint not to move for five minutes so as to finish the initial curing of the sleeve joint; the cure time is the time required for the solvent bond to reach the casing pressure rating and should keep the casing undisturbed by external forces for thirty minutes.
Furthermore, for the positioning piece in the step six, the positioning plates are at least divided into an upper layer and a lower layer, and are prefabricated according to different professional sub-units, and each unit independently corresponds to one positioning plate; the upright columns, the cross rods and the connecting rods are assembled and prefabricated according to the lengths of the positioning plates, and the upright columns are correspondingly connected to four corners of each positioning plate in the vertical direction.
The invention has the beneficial effects that:
1) the invention carries out comprehensive pipe distribution by setting the positioning piece and utilizing the BIM technology, adopts coordinate positioning on site, is beneficial to installing pipelines with different specialties and sizes in units, and the sleeve is further divided into a vertical section, a horizontal section and an arc section according to the trend of the pipeline, thereby meeting the installation requirements of different pipelines as much as possible;
2) according to the invention, the installation position of the pipeline can be determined by deepening the position of the pipeline to be installed in advance and numbering the sleeve in advance, and the vertical section of the sleeve is higher than the ground, so that the subsequent construction is facilitated; compared with the underground and open-top construction method, the underground and open-top construction method reduces the cross operation procedures with multiple specialties and provides larger aboveground building installation space for other specialties, so that the overall construction progress is greatly improved;
3) according to the invention, through the arrangement of the positioning support, on one hand, the pipeline classification and fixing are facilitated, and on the other hand, due to the convenient installation and adjustment of the positioning support, the adjustment according to the actual situation on site is facilitated; in addition, each positioning plate is horizontally arranged according to different professional or type units, so that the positioning plates are convenient to perform and adjust independently;
in addition, in the process of pipeline installation, the positioning, laying and burying of the sleeve are designed in a targeted manner, so that the pipeline is favorably and orderly installed on site; additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention; the primary objects and other advantages of the invention may be realized and attained by the instrumentalities particularly pointed out in the specification.
Drawings
FIG. 1 is a schematic view of the installation and connection of a positioning member and a sleeve;
FIG. 2 is a schematic view of the positioning bracket and the positioning plate;
FIG. 3 is a schematic view of a positioning bracket;
fig. 4 is a schematic structural view of the positioning plate.
Reference numerals: 1-positioning piece, 11-positioning support, 111-upright post, 112-cross bar, 113-connecting rod, 12-positioning plate, 121-positioning plate body, 122-positioning hole and 2-sleeve.
Detailed Description
Taking a shadow city underground cable as an example, the underground cable is installed through a positioning piece 1, as can be seen from fig. 1 to 4, the positioning device of the pipeline comprises a positioning piece 1 and a sleeve 2 connected in the positioning piece 1 in a penetrating way, the positioning piece 1 is a positioning bracket 11 in a frame structure and a positioning plate 12 lapped in the positioning bracket 11; the positioning bracket 11 comprises upright posts 111 arranged in a rectangular shape, a cross bar 112 connected to the long direction of the upright posts 111 and a connecting rod 113 connected to the short direction of the upright posts 111, and the upright posts 111, the cross bar 112 and the connecting rod 113 are all connected through bolts; if disposable, the upright 111, the cross bar 112 and the connecting rod 113 can be welded together.
In this embodiment, the positioning bracket 11 is made of angle steel, the rectangular frame formed by the cross bar 112 and the connecting rod 113 in the positioning bracket 11 is at least divided into an upper layer and a lower layer, and at least the opposite cross bar 112 or the opposite connecting rod 113 is an L-shaped member, wherein the width of the transverse portion of the L-shaped member is adapted to the lap joint width of the positioning plate 12.
In this embodiment, the positioning plate 12 is an aluminum plate, a wood plate, or a plastic plate, the positioning plate 12 is connected to the rectangular frame formed by the cross bar 112 and the connecting rod 113, and the positioning plate 12 includes a positioning plate body 121 and a positioning hole 122 disposed in the positioning plate body 121. The sleeve 2 is connected in the positioning hole 122 in a penetrating mode, the inner diameter of the positioning hole 122 is adaptive to the outer diameter of the sleeve 2, and the inner diameter of the sleeve 2 is adaptive to the outer diameter of a pipeline.
In this embodiment, the positioning bracket 11 is fixed in the soil layer for at least 1 m and the column 111 is fixed by C20 concrete for 200 mm. The tail end of the top of the vertical section of the sleeve 2 is provided with a label or is connected with a tag, and the top of the vertical section extends out of the designed ground elevation by at least 200 mm. The casing 2 comprises a vertical section connected to the spacer 1 and an arc-shaped section and a horizontal section connected below the vertical section and buried underground.
With reference to fig. 1 to 4, a construction method of the deep pipeline end precise positioning device is further described, which comprises the following specific steps:
step one, comprehensively arranging underground pipelines by using a BIM technology, determining the trend, the elevation and the position of an outlet pipe of the pipelines, and completing the deepening design of an underground buried sleeve 2; according to a construction drawing, a BIM technology is applied to model construction of routes of a distribution box, a control box, end equipment and a sleeve 2, arrangement and adjustment are carried out by integrating related specialties, and the accurate positions of the equipment and the sleeve 2 extending out of the ground and the route trend and the elevation of the sleeve 2 in the ground are determined; when the sleeve 2 is connected, the inner surface and the outer surface of a bell socket of a connecting pipe section are coated by adopting an adhesive, and a joint is quickly inserted before glue is dried to form a continuous pipeline.
Secondly, manufacturing a tube bank fixing plate and a support according to the tube outlet positions and the number of the tube bank sleeves 2 determined by a deepening design when the sleeves 2 are led out of a terrace or a floor slab, so that the tube bank positions are accurate, the spacing is accurate, and the sleeves 2 are vertically installed; ID numbering is carried out on each sleeve 2 according to the deepening design, and numbered hanging tags or marks are arranged at the gateway positions of the starting end and the terminal end of each sleeve 2, so that accurate cable threading in the later period is ensured;
wherein, the model derives a two-dimensional deepening map, the deepening map is marked with the coordinates of the starting end and the terminal of each sleeve 2, the route elevation of each sleeve 2 and the unique ID number of each pipeline; the number table of the sleeve 2 corresponds to the information such as the pipe diameter, the specification and the size of the cable, the loop number and the like; and drawing a detailed view of the installation and fixation nodes of the pipe section.
Thirdly, counting the required casings 2 and elbows of various specifications according to the deepening design, wherein the inner and outer wall surfaces of the casings 2 are smooth, have no cracks, obvious scratches and depressions, have uniform colors, and the pipe ends are flush, smooth and have no burrs; the related adhesive glue, cutting equipment, a fixing clamp for horizontally laying a pipeline, a vertically fixed bracket and the like are completely prepared;
step four, measuring and excavating the field according to the elevation of the sleeve 2 designed by the deepening drawing; the pipelines in the area are dense and the coverage area is wide, and the whole area is excavated to be 100mm below the designed elevation; if the pipeline is a local pipeline, locally excavating a groove; paving a medium-coarse sand layer with the thickness of 100mm below the designed elevation of the casing 2 at the bottommost layer, and tamping the foundation below the medium-coarse sand layer; then the underground part of the casing 2 is landfilled.
For the step four, when the sleeve 2 is buried, the buried depth of the sleeve 2 should meet the following conditions: unless otherwise stated, when the sleeve 2 passes through the equidirectional laying roadway, the length from the top of the sleeve to the road surface is not less than 0.7m, and when the sleeve is used on sidewalks and green belts, the length is not less than 0.5 m; the multi-system sleeves 2 are preferably laid in layers according to the system type, the minimum distance between the sleeves 2 in the same service type is 20mm, and the minimum distance between the power and signal sleeves 2 is 300 mm.
When in buried construction, except for the pile foundation, most reference objects such as a structural bottom plate, a building floor, a wall body, a beam column and the like are not constructed, and the field measurement of control lines such as an axis shaft network and the like is not obvious; and (3) carrying out construction while measuring and setting the elevation and the coordinate of the sleeve 2 by adopting a total station, marking by using a flag after the measuring point is finished, and pre-marking the routing connecting line of the sleeve 2 by using lime powder.
The sleeve 2 for construction needs to be preprocessed and preprocessed, a steel saw or a sleeve 2 cutting machine is adopted to cut the pipe, and after the pipe is cut, a reamer or abrasive paper is used to remove all chips and burrs from the inner edge and the outer edge of a cut; cleaning the surface of the spigot and the inner surface area of the bell and spigot, and wiping the spigot and the inner surface area by using clean lint-free cloth dipped with primer to remove stains and grease and soften the surface; coating a thin layer of solvent-free hydrosol on the inner surface of the bell and spigot; to ensure that no solvent accumulation occurs at the root of the socket, and then to apply glue evenly to the outer surface of the spigot.
For the connection of the sleeve 2, before the glue is dried, the joint is quickly inserted to a specified depth, and then the joint is rotated for a quarter of a circle so as to evenly spread the glue, and the joint is fixed at the position for at least thirty seconds without moving;
wiping off redundant glue extruded from the interior of the joint on the outer side of the joint, and maintaining the joint not to move for five minutes so as to finish the initial solidification of the interface of the sleeve 2; the cure time is the time required for the solvent bond to reach the pressure rating of casing 2 and should keep casing 2 undisturbed by external forces for thirty minutes.
Step five, arranging one or more layers of the applied casing pipes 2 in parallel to form a pipe row, and installing and fixing pipe clamps when the pipe row is laid; the pipe clamp is a hard PVC interlocking clamping sleeve assembled in a factory, and the size of the pipe clamp is matched with the size of the sleeve 2, the distance between the sleeves 2 and the outdoor temperature; the number of the fixed pipe clamps is not less than 4 per 6 meters of the casing pipe 2; in addition, the pipe bank of the cable well is arranged, and when the casing 2 is laid, the drainage slope is arranged towards the cable well, and the slope cannot be lower than 0.2%. The vertical pipe section is connected with the horizontal pipe section by an elbow.
And sixthly, manufacturing the positioning piece 1, drilling holes in the positioning plate 12 according to the size of the sleeve 2 and the pipe spacing, wherein the hole diameter is larger than the outer diameter of the sleeve 2 by 2mm, so that the expansion and contraction of the sleeve 2 along with the change of temperature in construction are facilitated. The positioning bracket 11 is manufactured according to the detailed node diagram, firstly a door-shaped bracket or a square bracket is manufactured, and the positioning plate 12 is horizontally connected to form a planar rectangular outer frame according to the size of the positioning plate 12, wherein the rectangular outer frame is used for supporting the positioning plate 12; four corners of the outer frame are vertically connected with four upright posts 111 to form a system fixed with the ground; in addition, the positioning support 11 is fixed in the soil layer for not less than 1 meter, 200mm around the upright post 111 is fixed by C20 concrete, and the fixing point position is increased or decreased according to the buried depth of the sleeve 2.
For the positioning piece 1 in the sixth step, the positioning plates 12 are at least two layers, and are prefabricated according to different professional sub-units, and each unit corresponds to one positioning plate 12 independently; the upright posts 111, the cross bars 112 and the connecting rods 113 are assembled and prefabricated according to the length of the positioning plates 12, wherein four corners of each positioning plate 12 in the vertical direction are correspondingly connected with the upright posts 111.
Step seven, according to the position of the pipeline, after the positioning piece 1 is manufactured, measuring the position of the vertical outlet pipe through coordinates, and calibrating the position of the positioning piece 1; then, the sleeve 2 is arranged to enable the vertical pipe section to pass through the positioning hole 122 on the positioning plate body 121; the length of the vertical pipe section is reserved according to the height of 200mm higher than the final finished surface.
Step eight, numbering and marking the sleeve 2 in time in the laying process, marking the middle part of the pipe section except for the start end and the end, and particularly numbering and marking the position of a port of the pipe section with construction pause or interruption; the fixed pipe clamp of the horizontal laying casing pipe 2 is fixed with the soil layer, and the displacement amount in the backfilling process is monitored. After the first layer of the casing 2 is laid and installed, artificial backfilling is carried out by adopting medium coarse sand, and tamping is carried out; repeating the above process every time one layer is laid. After the last layer of casing 2 has been laid, 100mm medium coarse sand is manually backfilled above and manually tamped. And in the range of 0.7m above the top of the pipe, manual backfilling is required, and mechanical bulldozing backfilling is strictly forbidden.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that may be made by those skilled in the art within the technical scope of the present invention will be covered by the scope of the present invention.
Claims (9)
1. A construction method of a deep pipeline tail end accurate positioning device is characterized in that the positioning device comprises a positioning piece (1) and a sleeve (2) detachably connected in the positioning piece (1), wherein the positioning piece (1) is a positioning bracket (11) in a frame structure and a positioning plate (12) detachably connected in the positioning bracket (11); the positioning support (11) comprises a stand column (111), a cross rod (112) and a connecting rod (113), wherein the cross rod (112) and the connecting rod (113) are connected to the stand column (111), the stand column is arranged in a rectangular shape, and the stand column (111), the cross rod (112) and the connecting rod (113) can be detachably connected;
the positioning plate (12) is connected to a rectangular frame consisting of the cross rod (112) and the connecting rod (113), and the positioning plate (12) comprises a positioning plate body (121) and a positioning hole (122) arranged in the positioning plate body (121); the sleeve (2) penetrates into the positioning hole (122), the inner diameter of the positioning hole (122) is adapted to the outer diameter of the sleeve (2), and the inner diameter of the sleeve (2) is adapted to the outer diameter of a pipeline;
the sleeve (2) comprises a vertical section connected to the positioning piece (1) and an arc-shaped section and a horizontal section which are connected below the vertical section and buried underground;
the construction method of the device for accurately positioning the tail end of the deep pipeline is characterized by comprising the following specific steps of:
the method comprises the following steps of firstly, comprehensively arranging underground pipelines by using a BIM technology, determining the trend, the elevation and the position of an outlet pipe of the pipelines, and completing the deepening design of the underground buried sleeve (2); according to a construction drawing, a BIM technology is applied to model construction of a distribution box, a control box, terminal equipment and a sleeve route, related specialties are integrated for arrangement and adjustment, the accurate positions of the equipment and the sleeve (2) extending out of the ground are determined, and the route trend and the elevation of the sleeve (2) under the ground are determined; when the sleeve (2) is connected, the inner surface and the outer surface of a bell and spigot of a connecting pipe section are coated with adhesive, and a joint is quickly bell and spigot before glue is dried to form a continuous pipeline;
secondly, when the sleeve (2) is led out of a floor or a floor slab surface, manufacturing a tube bank fixing plate and a support according to the tube outlet position and the number of the tube bank sleeves (2) determined by a deepening design, ensuring that the tube bank position is accurate and the distance is accurate, and vertically installing the sleeves (2); ID numbering is carried out on each sleeve (2) according to the deepening design, and numbered hanging tags or marks are arranged at the gateway positions of the starting end and the terminal end of each sleeve (2) to ensure accurate cable threading in the later period;
thirdly, counting the required casings (2) and elbows of various specifications according to the deepening design, wherein the inner and outer wall surfaces of the casings (2) are smooth, have no cracks, obvious scratches and depressions, have uniform colors, and the pipe ends are flush, smooth and free of burrs; related adhesive glue, cutting equipment, a fixing clamp for horizontally laying a pipeline, and a vertically fixed bracket are completely prepared;
measuring and excavating the field according to the elevation of the sleeve (2) designed by the deepening drawing; the pipelines in the area are dense and the coverage area is wide, and the whole area is excavated to be 100mm below the designed elevation; if the pipeline is a local pipeline, locally excavating a groove; paving a medium-coarse sand layer with the thickness of 100mm below the designed elevation of the casing (2) at the bottommost layer, and tamping the foundation below the medium-coarse sand layer; then, the underground part of the sleeve (2) is buried;
fifthly, arranging single coated sleeves (2) in parallel to form a tube bank or arranging a plurality of layers in parallel to form a tube bank, and installing and fixing tube clamps when the tube bank is laid; the pipe clamp is a hard PVC interlocking clamping sleeve assembled in a factory, and the size of the pipe clamp is matched with the size of the sleeve (2), the distance between the sleeves (2) and the outdoor temperature; each 6 m of the sleeve (2) is not less than 4 fixed pipe clamps; in addition, a pipe bank of the cable well is arranged, and when the sleeve (2) is laid, a drainage slope is arranged towards the cable well, wherein the slope is not lower than 0.2%; the vertical pipe section is connected with the horizontal pipe section by an elbow;
sixthly, manufacturing a positioning piece (1), drilling holes in the positioning piece (12) according to the size of the sleeve (2) and the pipe spacing, wherein the hole diameter is larger than the outer diameter of the sleeve (2) by 2 mm; the positioning support (11) is manufactured according to the detailed node diagram, firstly a door-shaped support or a square support is manufactured, the positioning support is horizontally connected to form a planar rectangular outer frame according to the size of the positioning plate (12), and the rectangular outer frame is used for supporting and connecting the positioning plate (12); four corners of the outer frame are vertically connected with four upright posts (111) to form a system fixed with the ground; in addition, the positioning support (11) is fixed in the soil layer for at least 1 meter, the periphery of the upright post (111) is fixed by 200mm by adopting C20 concrete, and the fixing point positions are increased or decreased according to the buried depth of the sleeve (2);
step seven, according to the position of the pipeline, after the positioning piece (1) is manufactured, measuring the position of the vertical outlet pipe through coordinates, and calibrating the position of the positioning piece (1); then arranging the sleeve (2) to enable the vertical pipe section to pass through a positioning hole (122) in the positioning plate body (121); the length of the vertical pipe section is reserved according to the height of 200mm higher than the final finished surface;
step eight, numbering and marking the sleeve (2) in time in the laying process, marking the middle part of the pipe section except for the start end and the end, and numbering and marking the position of a port of the pipe section with construction pause or interruption;
fixing a fixed pipe clamp of the horizontally laid casing pipe (2) with a soil layer, and monitoring the displacement amount in the backfilling process; after the first layer of casing (2) is laid and installed, artificial backfilling is carried out by adopting medium coarse sand, and tamping is carried out; repeating the above processes every laying one layer; after the last layer of the casing (2) is laid, manually backfilling coarse sand with the thickness of 100mm above the casing and manually tamping the coarse sand; and in the range of 0.7m above the top of the pipe, manual backfilling is required, and mechanical bulldozing backfilling is strictly forbidden.
2. The method for constructing a device for precisely locating the end of a deep pipeline according to claim 1, wherein the rectangular frame formed by the cross bars (112) and the connecting rods (113) in the locating bracket (11) is divided into at least upper and lower layers, and at least the opposite cross bars (112) or the opposite connecting rods (113) are L-shaped pieces, wherein the width of the cross parts of the L-shaped pieces is adapted to the overlapping width of the locating plate (12).
3. The method for constructing a device for precisely locating the end of a deep pipeline according to claim 2, wherein the locating bracket (11) is fixed in the soil layer for not less than 1 m and the column (111) is fixed with C20 concrete for 200mm around.
4. A method for constructing a device for precisely locating the end of a deep pipeline according to claim 3, wherein the top end of the vertical section of the casing (2) is provided with a mark or is connected with a tag, and the top of the vertical section extends out of the designed ground level by at least 200 mm.
5. The construction method of the precise positioning device for the end of the deep pipeline as claimed in claim 4, wherein the burying depth of the casing (2) is satisfied when the casing (2) is buried in the step four: when the sleeve (2) passes through the equidirectional laying roadway, the length from the top of the sleeve to the road surface is not less than 0.7m, and if the sleeve is on a sidewalk and a green belt, the length is not less than 0.5 m; the multi-system sleeves (2) are preferably laid in layers according to the system types, the minimum distance between the same service type sleeves (2) is 20mm, and the minimum distance between the power and signal sleeves (2) is 300 mm.
6. The construction method of the precise positioning device for the end of the deep pipeline according to claim 5, wherein for the buried construction, the structural bottom plate, the building floor, the wall body and the beam column are not constructed except for the pile foundation, and the on-site measurement of the axis shaft network is not obvious; and (3) carrying out construction while measuring the elevation and the coordinate of the sleeve (2) by adopting a total station, marking by using a flag after the measuring point is finished, and marking the routing connection line of the sleeve in advance by using lime powder.
7. The method of claim 6, wherein the casing (2) is pre-processed and pre-treated, a steel saw or a casing (2) cutting machine is used to cut the pipe, and after cutting, a reamer or a sand paper is used to remove all chips and burrs from the inner and outer edges of the cut; cleaning the surface of the spigot and the inner surface area of the bell and spigot, and wiping the spigot and the inner surface area by using clean lint-free cloth dipped with primer to remove stains and grease and soften the surface; coating a thin layer of solvent-free hydrosol on the inner surface of the bell and spigot; to ensure that no solvent accumulation occurs at the root of the socket, and then to apply glue evenly to the outer surface of the spigot.
8. The method of claim 7, wherein for the connection of the casing (2), the quick socket joint is quickly inserted to a prescribed depth before the glue dries, and then rotated a quarter turn to spread the glue, holding the joint in place for at least thirty seconds without moving;
wiping off redundant glue extruded from the interior of the joint on the outer side of the joint, and maintaining the joint not to move for five minutes so as to finish the initial solidification of the interface of the sleeve (2); the cure time is the time required for the solvent bond to reach the pressure rating of the sleeve (2) and should keep the sleeve (2) undisturbed by external forces for thirty minutes.
9. The construction method of a precise positioning device for the end of a deep pipeline according to claim 8, wherein for the positioning member (1) in the sixth step, the positioning plates (12) are at least two layers, and are prefabricated according to different professional sub-units, and each unit corresponds to one positioning plate (12) independently; the vertical columns (111), the cross rods (112) and the connecting rods (113) are assembled and prefabricated according to the length of the positioning plates (12), and the vertical columns (111) are correspondingly connected to four corners of each positioning plate (12) in the vertical direction.
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