CN112878515A - Waterproof construction method for base layer - Google Patents
Waterproof construction method for base layer Download PDFInfo
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- CN112878515A CN112878515A CN202110071280.5A CN202110071280A CN112878515A CN 112878515 A CN112878515 A CN 112878515A CN 202110071280 A CN202110071280 A CN 202110071280A CN 112878515 A CN112878515 A CN 112878515A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
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Abstract
The application relates to a waterproof construction method for a base layer, which comprises the following steps: the method comprises the following steps: cleaning dust on the surface of the concrete substrate; step two: laying a waterproof reinforcing layer on the surface of the crack; step three: the bottom ends of the two insertion rods are sequentially arranged on the waterproof reinforcing layer and the concrete base layer in a penetrating manner, so that the lower surfaces of the two pressing rings fixed at the top ends of the two insertion rods are abutted against the upper surface of the waterproof reinforcing layer; step four: rotate rotatory piece through rotating the rotary rod, rotatory piece drives the drive groove simultaneously rotatory, the drive groove drives the actuating lever respectively and slides in the drive groove, the actuating lever drives the pole of sliding respectively if the inslot that slides of erection column upper surface, the pole that slides drives the connecting rod and slides in the mounting hole of peg graft pole, every connecting rod drives the anticreep pole simultaneously and slides in the anticreep hole of peg graft pole lateral wall respectively to make the anticreep pole all insert and locate in the concrete basal layer. This application is convenient for the staff and extracts the spliced pole in the concrete foundation.
Description
Technical Field
The application relates to the field of building construction, in particular to a waterproof construction method for a base layer.
Background
Water is a source of life, but water is also an invisible killer for buildings, particularly acid water and soft water, which not only affects the service life of the buildings, but also causes great troubles to the quality of life of people. Therefore, water prevention and drainage of buildings are important.
Chinese patent with the publication number of CN4334U in the related art discloses a base crack waterproof structure, which comprises a concrete base and cracks located on the concrete base, wherein a waterproof reinforcing layer, a flexible waterproof layer and a waterproof protective layer are sequentially arranged on the upper surface of the concrete base, and the waterproof reinforcing layer covers the cracks, and is characterized in that a plurality of groups of anchoring assemblies are arranged between the flexible waterproof layer and the concrete base, the groups of anchoring assemblies are distributed on two sides of the cracks, the waterproof reinforcing layer is fixed on the concrete base through the anchoring assemblies, each anchoring assembly comprises a plastic expansion sleeve and a screw, the plastic expansion sleeve is sleeved on the screw, and the tip of the screw is located on the outer side of the plastic expansion sleeve; the plastic expansion casing comprises a pipe body and a pipe support, wherein the pipe support is arranged at the end tail of the pipe body, a tensile groove is formed in one side, away from the pipe body, of the pipe support, the opening diameter of the tensile groove is smaller than the diameter of the bottom of the groove, and a plurality of expansion strips are arranged at the end of the pipe body; the expansion strips are arranged in a circular array mode, and a plurality of inverted teeth are arranged on the outer surfaces of the expansion strips.
In view of the above-mentioned related art, the inventors found the following drawbacks in the course of their work: when the crack waterproof structure breaks down and needs to be repaired, the plurality of inverted teeth on the outer side of the plastic expansion strip can limit workers to pull out the screws from the concrete base layer.
Disclosure of Invention
In order to facilitate workers to pull out the insertion rod from the concrete base layer, the application provides a base layer waterproof construction method.
The waterproof construction method for the base layer adopts the following technical scheme:
a construction method for waterproofing a base layer comprises the following steps:
the method comprises the following steps: cleaning up sundries and dust on the surface of the concrete substrate;
step two: laying a waterproof reinforcing layer on the surface of the crack;
step three: the two insertion rods are respectively positioned at two sides of the crack, and the bottom ends of the two insertion rods are sequentially arranged on the waterproof reinforced layer and the concrete base layer in a penetrating manner, so that the lower surfaces of the two pressing rings fixed at the top ends of the two insertion rods are abutted against the upper surface of the waterproof reinforced layer;
step four: rotate rotatory piece through rotating the rotary rod, it is rotatory that rotatory piece drives a plurality of drive groove simultaneously, a plurality of drive groove drives a plurality of actuating lever respectively and slides in the drive inslot, a plurality of actuating lever drives a plurality of slide bar and slides at the inslot that slides of erection column upper surface respectively, slide bar drives the connecting rod and slides in the mounting hole of peg graft pole, every connecting rod drives a plurality of anticreep pole simultaneously and slides in the anticreep hole of peg graft pole lateral wall respectively, so that a plurality of anticreep pole all inserts and locates in the concrete basal layer.
Through adopting above-mentioned technical scheme, when the staff need dismantle the peg graft pole, the staff drives rotatory piece through the anticlockwise rotation rotary rod and rotates, the drive groove on the rotatory piece drives the actuating lever and slides along the length direction in drive groove, the actuating lever drives the pole that slides and slides towards the direction that is close to the rotary rod at the inslot orientation that slides, so that a plurality of anticreep pole slides at the downthehole orientation that is close to the rotary rod of anticreep, so that all anticreep poles slide to the mounting hole in, thereby relieve the anticreep effect of all anticreep poles to the peg graft pole, be convenient for the staff extract the peg graft pole from the concrete basal layer.
Optionally, be provided with the direction subassembly in the mounting hole, the direction subassembly includes guide block and a plurality of dead lever, a plurality of the dead lever is close to the one end of guide block with guide block fixed connection, a plurality of the dead lever is kept away from the one end of guide block with the lateral wall fixed connection of mounting hole, seted up the confession on the guide block the guiding hole that the rotary rod passed, the bottom of rotary rod with rotatory piece fixed connection, the top of rotary rod is passed the guiding hole, the rotary rod with the guiding hole rotates to be connected.
Through adopting above-mentioned technical scheme, the guiding hole on the guide block has increased the rotatory stability of rotary rod to make the staff can not take place to rock at the in-process rotary rod that rotates the rotary rod.
Optionally, a hand wheel is fixedly arranged at the top end of the rotating rod.
Through adopting above-mentioned technical scheme, the staff rotates the rotary rod through rotatory hand wheel, compares and rotates the rotary rod between, labour saving and time saving more.
Optionally, a cover plate is arranged on the insertion rod, and the cover plate is in threaded fit with the mounting hole.
Through adopting above-mentioned technical scheme, in the apron can restrict debris from getting into the mounting hole from the top of mounting hole, apron and mounting hole screw-thread fit have increased the convenience that the staff installed and dismantled the apron.
Optionally, a handle is fixedly arranged on the upper surface of the cover plate.
Through adopting above-mentioned technical scheme, the staff rotates the apron through rotating the handle, compares in directly rotating the apron, has increased staff's hand and the area of contact between the apron, labour saving and time saving more.
Optionally, the bottom end of the insertion rod is fixedly provided with a first pointed end.
Through adopting above-mentioned technical scheme, first pointed end has reduced the area of contact of the bottom of grafting pole and concrete substrate to increased the pressure of grafting pole to concrete substrate, so that the staff inserts the in-process labour saving and time saving more of grafting pole in the concrete substrate.
Optionally, one end of the anti-falling rod, which is far away from the connecting rod, is fixedly provided with a second tip.
Through adopting above-mentioned technical scheme, the tip that the second pointed end has reduced the anticreep pole and the area of contact of concrete substrate to increased the pressure of anticreep pole to concrete substrate, so that the staff inserts the anticreep pole in the concrete substrate process labour saving and time saving more.
Optionally, after the fourth step is completed, a flexible waterproof layer is laid on the surface of the waterproof reinforcing layer, and a waterproof protective layer is laid on the surface of the flexible waterproof layer.
Through adopting above-mentioned technical scheme, flexible waterproof layer and waterproof layer not only have the guard action to plug-in pole and waterproof enhancement layer, have increased the roughness on concrete substrate surface simultaneously.
In summary, the present application includes at least one of the following beneficial technical effects:
1. when the worker needs to disassemble the plugging rod, the worker drives the rotating block to rotate by rotating the rotating rod anticlockwise, the driving groove on the rotating block drives the driving rod to slide along the length direction of the driving groove, the driving rod drives the sliding rod to slide in the sliding groove towards the direction close to the rotating rod, so that the plurality of anti-falling rods slide in the anti-falling holes towards the direction close to the rotating rod, all the anti-falling rods slide into the mounting holes, the anti-falling effect of all the anti-falling rods on the plugging rod is relieved, and the worker can conveniently pull the plugging rod out of the concrete foundation layer;
2. the guide holes in the guide blocks increase the rotating stability of the rotating rod, so that the rotating rod cannot shake during the rotating process of the rotating rod by workers;
3. the staff rotates the rotary rod through rotatory hand wheel, compares and rotates the rotary rod between, labour saving and time saving more.
Drawings
Fig. 1 is a schematic structural view of a waterproof base structure in an embodiment of the present application.
Fig. 2 is a half sectional view of the anchoring device of the present application in an embodiment thereof.
Description of reference numerals: 1. a concrete base layer; 11. cracking; 2. a waterproof reinforcing layer; 3. a flexible waterproof layer; 4. a waterproof protective layer; 5. an anchoring mechanism; 51. a plug rod; 511. a first tip; 512. mounting holes; 513. anti-drop holes; 52. pressing and closing the ring; 53. a cover plate; 531. a handle; 6. an anti-drop mechanism; 61. an anti-drop component; 611. mounting a column; 6111. a sliding groove; 6112. rotating the hole; 612. a drop-off prevention member; 6121. a slide bar; 6122. a connecting rod; 6123. an anti-drop rod; 61231. a second tip; 62. a guide assembly; 621. a guide block; 6211. a guide hole; 622. fixing the rod; 63. a drive assembly; 631. a rotating member; 6311. rotating the block; 63111. a drive slot; 6312. rotating the rod; 63121. a hand wheel; 632. a drive rod.
Detailed Description
The present application is described in further detail below with reference to figures 1-2.
The embodiment of the application discloses waterproof construction of basic unit. Referring to fig. 1 and 2, the base waterproof structure includes a concrete base 1, a waterproof reinforcing layer 2, an anchoring means, a flexible waterproof layer 3, and a waterproof protective layer 4. The internal opening of concrete-based layer 1 has crack 11, and waterproof enhancement layer 2 is laid in concrete-based layer 1's upper surface, and waterproof enhancement layer 2 is used for plugging up crack 11, and anchoring device is used for fixed waterproof enhancement layer 2, and flexible waterproof layer 3 is laid in anchoring device and waterproof enhancement layer 2's surface, and waterproof layer 4 is laid in flexible waterproof layer 3's upper surface.
With continued reference to fig. 1 and 2, the anchoring device includes an anchoring mechanism 5 and an anti-dropping mechanism 6, the anchoring mechanism 5 includes a plug rod 51 and a press-fit ring 52, the plug rod 51 is cylindrical, and the length direction of the plug rod 51 is vertical. The bottom end of the insertion rod 51 is integrally formed with a first tip 511, and the first tip 511 is in the shape of a cone. The pressing ring 52 is integrally formed on the outer side wall of the top end of the insertion rod 51, the pressing ring 52 is in the shape of a circular ring pile, and the upper surface of the pressing ring 52 is flush with the top end of the insertion rod 51. The staff is located the both sides of crack 11 respectively with two spliced poles 51, wears to locate waterproof enhancement layer 2, concrete-based layer 1 in proper order with two spliced poles 51's bottom to the equal butt in the upper surface of waterproof enhancement layer 2 of lower surface of two crimping ring 52 that are fixed in two spliced poles 51 tops, thereby realizes fixing waterproof enhancement layer 2.
Referring to fig. 2, the retaining mechanism 6 includes a retaining member 61, a driving member 63, and a guide member 62. The mounting groove has been seted up on insertion rod 51's top, and the length direction of mounting groove is vertical direction, and the bottom of mounting groove is to seal the setting. In the present embodiment, the retaining assembly 61 includes a mounting column 611 and four retaining members 612, the mounting column 611 is in the shape of a rectangular parallelepiped, and the axial direction of the mounting column 611 is the vertical direction. The lower surface of the mounting post 611 abuts against the bottom of the mounting groove and is mounted to the insertion rod 51 in an integral manner. Specifically, each anti-slip member 612 includes a sliding bar 6121, a connecting bar 6122, and three anti-slip bars 6123. Four sliding grooves 6111 are formed in the upper surface of the mounting column 611, and the four sliding grooves 6111 are combined on the upper surface of the mounting column 611 to form a cross shape. The four sliding bars 6121 are all rectangular solids, the length directions of the four sliding bars 6121 are all horizontal directions, and the four sliding bars 6121 are respectively matched with the four sliding grooves 6111 in a sliding manner. For each anti-falling piece 612, the shape of the connecting rod 6122 is also a cuboid, the length direction of the connecting rod 6122 is a vertical direction, one end of the sliding rod 6121, which is far away from the axis of the mounting column 611, is integrally formed with the side wall of the connecting rod 6122, and the sliding rod 6121 and the connecting rod 6122 are combined into a T shape. The three anti-falling rods 6123 are all cylinders, the length directions of the three anti-falling rods 6123 are all horizontal directions, and one ends of the three anti-falling rods 6123 close to the connecting rod 6122 are all formed integrally with the side wall of the connecting rod 6122, which deviates from the sliding rod 6121.
With reference to fig. 2, the sidewall of the plugging rod 51 is provided with anti-falling holes 513 for the anti-falling rods 6123 to pass through, the number of the anti-falling holes 513 is twelve, and the twelve anti-falling holes 513 correspond to the twelve anti-falling rods 6123 one by one. The twelve anti-falling rods 6123 are respectively matched with the twelve anti-falling holes 513 in a sliding manner. In order to facilitate the anti-falling rods 6123 to be inserted into the anti-falling holes 513, one end of each anti-falling rod 6123, which is far away from the connecting rod 6122, is integrally formed with a second tip 61231, and the second tip 61231 is also conical.
With reference to fig. 2, the driving assembly 63 includes a rotating member 631 and four driving rods 632, the four driving rods 632 are respectively integrally formed on the upper surfaces of the four sliding rods 6121, and the driving rods 632 are located at one end of the sliding rods 6121 far away from the connecting rod 6122. The driving rod 632 is shaped like a cylinder, and the length direction of the driving rod 632 is vertical.
With continued reference to fig. 2, the rotating member 631 includes a rotating rod 6312 and a rotating block 6311, the rotating rod 6312 is shaped as a cylinder, and the length direction of the rotating rod 6312 is a vertical direction. The upper surface of the mounting column 611 is provided with a rotating hole 6112, the bottom end of the rotating rod 6312 is inserted into the rotating hole 6112, the rotating rod 6312 is rotatably connected with the rotating hole 6112, the rotating block 6311 is integrally formed with the rotating rod 6312, the rotating block 6311 is also cylindrical, the rotating block 6311 and the rotating rod 6312 are coaxially arranged, and the lower surface of the rotating block 6311 abuts against the upper surface of the mounting column 611. The upper surface of the rotating block 6311 is provided with a driving slot 63111 for the driving rod 632 to pass through, and the driving slot 63111 is an arc-shaped slot. The number of the driving grooves 63111 is also four, the top ends of the four driving rods 632 are all inserted into the driving grooves 63111, and the four driving rods 632 are respectively matched with the four driving grooves 63111 in a sliding manner.
With continued reference to fig. 2, the worker rotates the rotating block 6311 by rotating the rotating rod 6312, so as to slide all the anti-drop bars 6123 toward or away from the anti-drop holes 513. To increase the stability of the rotation of the rotating rod 6312, the guide assembly 62 is disposed in the mounting hole 512. The guide assembly 62 comprises a guide block 621 and four fixing rods 622, the horizontal section of the guide block 621 is circular, the diameter of the guide block 621 is smaller than that of the mounting hole 512, and the four fixing rods 622 are cuboid. The one end that four dead levers 622 are close to guide block 621 all with the lateral wall integrated into one piece of guide block 621, four dead levers 622 along guide block 621 circumference equidistant evenly distributed, the one end that four dead levers 622 kept away from guide block 621 welds with the inside wall of mounting hole 512 to be fixed in mounting hole 512 with guide block 621.
With reference to fig. 2, the upper surface of the guide block 621 is provided with a guide hole 6211 for the driving rod 632 to pass through, the top end of the driving rod 632 passes through the guide hole 6211, and the driving rod 632 is rotatably connected to the guide hole 6211. In order to facilitate the rotation of the rotating rod 6312 by the worker, a handwheel 63121 is welded to the top end of the rotating rod 6312.
With continued reference to fig. 2, in order to limit the sundries from entering the mounting hole 512, the top end of the plug rod 51 is provided with a cover plate 53, the horizontal section of the cover plate 53 is circular, and the cover plate 53 is in threaded fit with the mounting hole 512. In order to facilitate the worker to rotate the cover plate 53, a handle 531 is welded to the upper surface of the cover plate 53.
The waterproof construction method for the base layer comprises the following steps:
installation step of waterproof structure of basic unit:
the method comprises the following steps: cleaning up sundries and dust on the surface of the concrete base layer 1;
step two: laying the waterproof reinforcing layer 2 on the surface of the crack 11;
step three: the two inserting rods 51 are respectively positioned at two sides of the crack 11, and the first tip ends 511 at the bottom ends of the two inserting rods 51 are sequentially arranged on the waterproof reinforcing layer 2 and the concrete base layer 1 in a penetrating manner, so that the lower surfaces of the two pressing rings 52 fixed at the top ends of the two inserting rods 51 are abutted against the upper surface of the waterproof reinforcing layer 2;
step four: the hand wheel 63121 is rotated clockwise to rotate the rotating rod 6312, the rotating rod 6312 drives the rotating block 6311 to rotate clockwise, the rotating block 6311 drives the four driving grooves 63111 to rotate clockwise simultaneously, the four driving grooves 63111 drive the four driving rods 632 to slide in the driving grooves 63111 toward the direction close to the anti-falling holes 513, the four driving rods 632 drive the four sliding rods 6121 to slide in the sliding grooves 6111 on the upper surface of the mounting post 611, the sliding rods 6121 drive the connecting rods 6122 to slide in the mounting holes 512 of the plugging rod 51, each connecting rod 6122 drives the three anti-falling rods 6123 to slide in the anti-falling holes 513 on the side walls of the plugging rod 51, so that the second tips 61231 on the three anti-falling rods 6123 are inserted into the concrete base 1;
step five: laying the flexible waterproof layer 3 on the surfaces of the anchoring device and the waterproof reinforcing layer 2;
step six: the waterproof protective layer 4 is laid on the upper surface of the flexible waterproof layer 3.
The disassembly step of the waterproof structure of the base layer:
the method comprises the following steps: detaching the waterproof protective layer 4 from the upper surface of the flexible waterproof layer 3;
step two: the flexible waterproof layer 3 is detached from the anchoring device and the upper surface of the waterproof reinforcing layer 2;
step three: the hand wheel 63121 is rotated counterclockwise to rotate the rotating rod 6312, the rotating rod 6312 drives the rotating block 6311 to rotate counterclockwise, the rotating block 6311 drives the four driving grooves 63111 to rotate counterclockwise at the same time, the four driving grooves 63111 respectively drive the four driving rods 632 to slide in the driving grooves 63111 toward the direction close to the anti-falling holes 513, the four driving rods 632 drive the four sliding rods 6121 to slide in the sliding grooves 6111 on the upper surface of the mounting post 611, the sliding rods 6121 drive the connecting rods 6122 to slide in the mounting holes 512 of the plugging rod 51, each connecting rod 6122 simultaneously drives the three anti-falling rods 6123 to slide in the anti-falling holes 513 on the side wall of the plugging rod 51, so that the second tips 61231 on the three anti-falling rods 6123 slide into the mounting holes 512, and the anti-falling effect of the anti-falling rods 6123 on the plugging rod 51 is removed;
step four: thereby the inserting rod 51 is pulled out from the concrete base layer 1, and the fixing function of the pressing ring 52 to the waterproof reinforcing layer 2 is released.
Step five: the waterproof reinforcing layer 2 is replaced.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. A construction method for waterproofing a base layer is characterized by comprising the following steps:
the method comprises the following steps: cleaning up sundries and dust on the surface of the concrete base layer (1);
step two: laying the waterproof reinforcing layer (2) on the surface of the crack (11);
step three: the two insertion rods (51) are respectively positioned at two sides of the crack (11), and the bottom ends of the two insertion rods (51) are sequentially arranged on the waterproof reinforcing layer (2) and the concrete base layer (1) in a penetrating manner, so that the lower surfaces of the two pressing and closing rings (52) fixed at the top ends of the two insertion rods (51) are abutted against the upper surface of the waterproof reinforcing layer (2);
step four: rotate rotatory piece (6311) through rotating rotary rod (6312), rotatory piece (6311) drives a plurality of drive groove (63111) simultaneously and rotates, a plurality of drive groove (63111) drive a plurality of actuating lever (632) respectively and slide in drive groove (63111), a plurality of actuating lever (632) drive a plurality of slide bar (6121) and slide respectively in slide groove (6111) of erection column (611) upper surface, slide bar (6121) drive connecting rod (6122) and slide in mounting hole (512) of peg graft pole (51), every connecting rod (6122) drive a plurality of anticreep pole (6123) simultaneously and slide respectively in anticreep hole (513) of peg pole (51) lateral wall, so that a plurality of anticreep pole (6123) all insert and locate in concrete foundation (1).
2. The waterproofing construction method for foundation according to claim 1, wherein: be provided with direction subassembly (62) in mounting hole (512), direction subassembly (62) include guide block (621) and a plurality of dead lever (622), a plurality of dead lever (622) are close to the one end of guide block (621) with guide block (621) fixed connection, a plurality of dead lever (622) are kept away from the one end of guide block (621) with the lateral wall fixed connection of mounting hole (512), offer the confession on guide block (621) guiding hole (6211) that rotary rod (6312) passed, the bottom of rotary rod (6312) with rotatory piece (6311) fixed connection, the top of rotary rod (6312) is passed guiding hole (6211), rotary rod (6312) with guiding hole (6211) rotate and are connected.
3. The waterproofing construction method for a foundation according to claim 2, wherein: and a hand wheel (63121) is fixedly arranged at the top end of the rotating rod (6312).
4. The waterproofing construction method for a foundation according to claim 2, wherein: the plug rod (51) is provided with a cover plate (53), and the cover plate (53) is in threaded fit with the mounting hole (512).
5. The waterproofing construction method for foundation according to claim 4, wherein: and a handle (531) is fixedly arranged on the upper surface of the cover plate (53).
6. The waterproofing construction method for foundation according to claim 1, wherein: the bottom end of the insertion rod (51) is fixedly provided with a first pointed end (511).
7. The waterproofing construction method for foundation according to claim 1, wherein: one end of the anti-falling rod (6123) far away from the connecting rod (6122) is fixedly provided with a second tip (61231).
8. The waterproofing construction method for foundation according to claim 1, wherein: after the fourth step is finished, a flexible waterproof layer (3) is laid on the surface of the waterproof reinforcing layer (2), and a waterproof protective layer (4) is laid on the surface of the flexible waterproof layer (3).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110071280.5A CN112878515B (en) | 2021-01-19 | 2021-01-19 | Construction method for base waterproof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110071280.5A CN112878515B (en) | 2021-01-19 | 2021-01-19 | Construction method for base waterproof |
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| CN112878515A true CN112878515A (en) | 2021-06-01 |
| CN112878515B CN112878515B (en) | 2022-08-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113652926A (en) * | 2021-09-13 | 2021-11-16 | 北京泛华新兴体育产业股份有限公司 | Anchoring lawn and construction process thereof |
| CN114303807A (en) * | 2021-12-27 | 2022-04-12 | 中科鼎实环境工程有限公司 | Comprehensive treatment system and method for mine |
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| KR100847358B1 (en) * | 2008-02-29 | 2008-07-22 | (자)한진개발공사 | Anchor |
| CN205331163U (en) * | 2015-12-12 | 2016-06-22 | 重庆市长寿区农产品商贸流通协会 | A lock ground screw for agricultural product exhibition fence |
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| Publication number | Publication date |
|---|---|
| CN112878515B (en) | 2022-08-23 |
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