CN114482017B - Precast concrete tubular pile stake core hole sealing device - Google Patents
Precast concrete tubular pile stake core hole sealing device Download PDFInfo
- Publication number
- CN114482017B CN114482017B CN202210001932.2A CN202210001932A CN114482017B CN 114482017 B CN114482017 B CN 114482017B CN 202210001932 A CN202210001932 A CN 202210001932A CN 114482017 B CN114482017 B CN 114482017B
- Authority
- CN
- China
- Prior art keywords
- top plate
- bottom plate
- annular rib
- sealing device
- elastic ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000007789 sealing Methods 0.000 title claims abstract description 46
- 239000011178 precast concrete Substances 0.000 title claims description 14
- 238000001125 extrusion Methods 0.000 claims abstract description 16
- 230000000903 blocking effect Effects 0.000 claims abstract description 13
- 230000000149 penetrating effect Effects 0.000 claims abstract description 3
- 238000003466 welding Methods 0.000 claims description 10
- 239000004567 concrete Substances 0.000 abstract description 5
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 238000010276 construction Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000011513 prestressed concrete Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000002352 surface water Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
- E02D5/30—Prefabricated piles made of concrete or reinforced concrete or made of steel and concrete
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/223—Details of top sections of foundation piles
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention provides a prefabricated concrete pipe pile core hole sealing device which comprises a top plate, wherein a through hole is formed in the top plate, a bottom plate is arranged below the top plate, a connecting piece penetrating through the through hole is connected to the bottom plate, a blocking piece is arranged between the top plate and the bottom plate, the blocking piece is sleeved outside the connecting piece, an elastic ring is sleeved outside the blocking piece, an extrusion piece positioned above the top plate is arranged on the connecting piece, the extrusion piece is used for enabling the top plate to move downwards to shorten the distance between the top plate and the bottom plate, the elastic ring is extruded to enable the elastic ring to deform outwards, the extrusion piece is used for controlling the extrusion piece to move downwards to shorten the distance between the top plate and the bottom plate, the elastic ring is extruded to enable the elastic ring to deform outwards, the elastic ring deforms after being pressed, the pressure is larger, and the deformation is larger, so that the pipe pile core is finally treated.
Description
Technical Field
One or more embodiments of the present disclosure relate to the field of pile core plugging technologies, and in particular, to a pile core hole sealing device for a precast concrete pipe pile.
Background
Along with the development of economic construction, pretensioned prestressed concrete pipe piles are widely applied to railway systems and are expanded to the fields of industrial and civil buildings, municipal administration, metallurgy, ports, roads and the like. In Yangtze river delta and Zhujiang river delta areas, the geological conditions are suitable for the use characteristics of the pipe pile, and the demand of the pipe pile is increased rapidly, so that an emerging industry is formed rapidly. According to incomplete statistics, the annual production of various tubular piles in the whole country exceeds 3 hundred million meters, so that the tubular piles become an emerging industry rich in gas, and the tubular piles account for about 50% of the production value in the cement product industry in the whole country.
The tubular pile is divided into pretensioned prestressing tubular pile and post-tensioned prestressing tubular pile according to the manufacturing process, wherein the pretensioned prestressing tubular pile is a hollow cylinder body slender concrete prefabricated part manufactured by pretensioned prestressing process and centrifugal forming method, and mainly comprises a cylindrical pile body, an end plate, a steel hoop and the like. The pipe piles are classified into prestressed concrete pipe piles (PC pipe piles) and high-strength prestressed concrete pipe piles (PHC pipe piles) according to pile body strength.
The precast concrete pipe pile is widely applied because of the advantages of high strength grade, reliable quality, low cost, high construction speed, civilized construction and the like. However, because the pile core is of a hollow tubular structure, surface water or underground water easily flows into the rock stratum at the pile end after entering the pipe pile, and particularly, the lithology of mudstone becomes soft, the strength is reduced and the bearing capacity is reduced after meeting water. At present, the traditional solution method mainly carries out pile core back cover treatment, such as pile core Kong Jiaoguan back cover concrete, steel pile tip wearing and the like, and the traditional method has the following defects: (1) The concrete pouring of the pile core Kong Fengde is easy to generate segregation and is not compact, and the purpose of bottom sealing cannot be achieved; and (2) the steel pile tip has poor corrosion resistance and consumes steel resources.
Disclosure of Invention
In view of the above, the present invention is directed to a hole sealing device for a pile core of a precast concrete pipe pile, which is used for solving all or one of the problems in the prior art.
Based on the above object, the invention provides a precast concrete tubular pile core hole sealing device, which comprises a top plate, wherein a through hole is formed in the top plate, a bottom plate is arranged below the top plate, a connecting piece penetrating through the through hole is connected to the bottom plate, a blocking piece is arranged between the top plate and the bottom plate, the blocking piece is sleeved outside the connecting piece, an elastic ring is sleeved outside the blocking piece, an extrusion piece positioned above the top plate is arranged on the connecting piece, the extrusion piece is used for enabling the top plate to move downwards to shorten the distance between the top plate and the bottom plate, and then the elastic ring is extruded to enable the elastic ring to deform outwards.
Optionally, an upper handle is disposed on the top plate.
Optionally, a control telescopic rod is arranged between the upper handle and the top plate.
Optionally, the perforation is offered roof central point puts, the connecting piece is the screw, the screw lower extreme with the central point of bottom plate puts and is connected, the extrusion piece be with the hand screw nut handle of screw cooperation connection.
Optionally, the baffle comprises an upper annular rib connected with the lower end surface of the top plate, a lower annular rib connected with the upper end surface of the bottom plate is arranged obliquely below the upper annular rib, and the diameter of the inner ring of the upper annular rib is larger than the diameter of the outer ring of the lower annular rib.
Optionally, the outer side of the upper end of the upper annular rib is fixedly connected with the top plate through an upper welding node, and the inner side of the lower end of the lower annular rib is fixedly connected with the bottom plate through a lower welding node.
Optionally, the lower end of the upper annular rib is in a blade foot shape.
Optionally, the elastic ring is a sealing ring or an air charging ring.
According to the device for sealing the pile core of the precast concrete pipe pile, when the pile core of the pipe pile body is required to be sealed, the device is placed in the pile core of the pipe pile to be sealed, the extrusion piece is controlled to extrude the top plate to move downwards so as to shorten the distance between the top plate and the bottom plate, and then the elastic ring is extruded so that the elastic ring deforms outwards, the elastic ring deforms after being pressed, the inner wall of the pile core of the pipe pile is extruded, the larger the pressure is, the larger the deformation is, and finally the sealing treatment of the pile core of the pipe pile is realized.
Drawings
For a clearer description of one or more embodiments of the present description or of the solutions of the prior art, the drawings that are necessary for the description of the embodiments or of the prior art will be briefly described, it being apparent that the drawings in the description below are only one or more embodiments of the present description, from which other drawings can be obtained, without inventive effort, for a person skilled in the art.
FIG. 1 is a schematic view of the placement of the present device into a pile core of a pipe pile according to one or more embodiments of the present disclosure;
fig. 2 is a schematic structural diagram of one or more embodiments of the present disclosure.
In the figure: the pipe pile comprises a pipe pile body 1, a pipe pile core 2, a hole sealing device 3, an upper welding node 4, a lower welding node 5, a top plate 6, an upper annular rib 7, a bottom plate 8, a lower annular rib 9, an upper handle 10, a hand-screwed nut handle 11, a screw 12 and a sealing ring 13.
Detailed Description
The present invention will be further described in detail below with reference to specific embodiments and with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present invention more apparent.
It should be noted that unless otherwise defined, technical or scientific terms used in the embodiments of the present invention should be given the ordinary meaning as understood by one of ordinary skill in the art to which the present disclosure pertains. The terms "first," "second," and the like, as used in this disclosure, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
The utility model provides a precast concrete tubular pile stake core hole sealing device, includes roof 6, the perforation has been seted up on the roof 6, roof 6 below is provided with bottom plate 8, be connected with on the bottom plate 8 run through perforated connecting piece, roof 6 with be provided with between the bottom plate 8 and keep off the piece, keep off the piece cover and establish the connecting piece outside, keep off the piece outside cover and be equipped with the elastic ring, be provided with the extrusion piece that is located roof 6 top on the connecting piece, the extrusion piece is used for roof 6 downwardly moving to shorten roof 6 with distance between the bottom plate 8, and then extrude the elastic ring and make the elastic ring outwards warp the removal, when needs carry out the hole sealing to tubular pile stake core 2 in the tubular pile body 1, place this hole sealing device 3 in tubular pile core 2 of waiting to hole sealing, control extrusion piece is used for extruding roof 6 downwardly moving to shorten the distance between roof 6 with bottom plate 8, and then extrude the elastic ring and make the elastic ring outwards warp removal, the elastic ring warp after being pressed, extrudees tubular pile core 2 inner wall, and the pressure is bigger and is warp more than big finally, realizes the hole sealing to tubular pile core 2.
Optionally, the top plate 6 is provided with an upper handle 10, so as to facilitate the placement of the hole sealing device 3 in the tubular pile core 2 in the tubular pile body 1, or the removal of the hole sealing device 3 from the tubular pile core 2 already placed in the tubular pile body 1.
The upper handle 10 with be provided with the control telescopic link between the roof 6, the flexible convenience of control telescopic link people place hole sealing device 3 in tubular pile stake core 2, perhaps the flexible convenience of control telescopic link people takes out hole sealing device 3 from tubular pile stake core 2, simultaneously in the last handle 10 that the control telescopic link extension is convenient for operating personnel observe on the control telescopic link, is convenient for perceive the position that hole sealing device 3 was placed, makes things convenient for operating personnel's work.
In the invention, the through hole is formed in the central position of the top plate 6, the connecting piece is a screw 12, the lower end of the screw 12 is connected with the central position of the bottom plate 8, the extrusion piece is a hand-screwed nut handle 11 which is matched and connected with the screw 12, the hand-screwed nut handle 11 is rotated to downwards extrude the top plate 6, so that the distance between the top plate 6 and the bottom plate 8 is shortened, the elastic ring is extruded to outwards deform and move, and the elastic ring is extruded to extrude the tubular pile core 2 to realize hole sealing of the tubular pile core.
Optionally, the blocking piece comprises an upper annular rib 7 connected with the lower end surface of the top plate 6, a lower annular rib 9 connected with the upper end surface of the bottom plate 8 is arranged obliquely below the upper annular rib 7, the diameter of the inner ring of the upper annular rib 7 is larger than that of the outer ring of the lower annular rib 9, and the blocking piece plays a role of blocking the elastic ring, so that the elastic ring is not deformed towards the inner circle center direction when being pressed; while the upper annular rib 7 and the lower annular rib 9 function to increase the rigidity of the top and bottom plates 8.
In the invention, the outer side of the upper end of the upper annular rib 7 is fixedly connected with the top plate 6 through the upper welding node 4, the inner side of the lower end of the lower annular rib 9 is fixedly connected with the bottom plate 8 through the lower welding node 5, the upper welding node 4 is arranged on the outer side, the lower welding node 5 is arranged on the inner side, the maximum movable space exists when the top plate and the bottom plate are relatively displaced, the heights of the upper annular rib 7 and the lower annular rib 9 are half of the height of the elastic ring, and the upper annular rib 7 and the lower annular rib 9 are ensured not to collide when the elastic ring is pressed.
Optionally, the lower end of the upper annular rib 7 is in a blade foot shape, so that the resistance of the elastic ring to the elastic ring caused by compression deformation is reduced, and the compression downward movement stroke of the top plate is not affected.
As an optional implementation manner, the extrusion piece may further include a driving telescopic rod connected to the connecting piece, the driving telescopic rod is hydraulically driven or electrically driven, a squeezing plate is connected to a telescopic end of the driving telescopic rod, the squeezing plate is located between the driving telescopic rod and the top plate 6, the driving telescopic rod stretches to control the squeezing plate to move downwards to squeeze the top plate 6, so that the distance between the top plate 6 and the bottom plate 8 is shortened, and then an elastic ring is squeezed to deform and move outwards, so that the elastic ring squeezes the tubular pile core 2 to realize hole sealing of the tubular pile core.
The lower end of the screw 12 is in sliding connection with the bottom plate 8; the lower end of the screw 12 is connected with the bottom plate 8 through a bearing; or the bottom plate 8 is provided with an annular chute, a sliding block connected with the screw 12 is arranged in the annular chute, so that the bottom plate 8 can not rotate when the screw 12 rotates, and the blocking piece is a multi-section telescopic sleeve.
The elastic ring is a sealing ring 13, an inflation ring and the like, the sealing ring 13 is made of a silica gel material with moderate elasticity and 1-2 cm in thickness, the sealing ring is trapezoid, the diameters of the upper edge and the lower edge of the sealing ring 13 are slightly larger than those of the top plate and the bottom plate before the sealing ring 13 is pressed, and the diameter of the upper edge of the sealing ring 13 is slightly smaller than the inner diameter of the pile core 2 of the pipe pile body 1.
The bottom plate and the top plate are made of concentric unequal-diameter steel plates with certain thickness and certain rigidity, and deformation is avoided when the bottom plate and the top plate are pressed.
The highest point of the hole sealing device 3 in hole sealing is lower than the end plate of the pipe pile, so that damage during pile sinking is avoided.
When the pile cap is to be poured, the hole sealing device 3 needs to be taken out of the pile core 2, the upper handle 10 is held by one hand, the hand-screwed nut handle 11 is turned upwards to be loosened by the other hand, and the top plate 6 is loosened upwards, so that the distance between the top plate 6 and the bottom plate 8 is increased, the deformed elastic ring is contracted inwards to reset, and finally the hole sealing device 3 is taken out through the upper handle 10.
The hole sealing device 3 is convenient to install and high in construction speed, the hole sealing device 3 can be taken out for reuse, the manufacturing cost is saved, the hole sealing device 3 can replace the traditional bottom sealing concrete or steel pile tip, the resource is saved, the hole sealing device is simple and convenient to install, the water stopping effect is guaranteed, and surface water or shallow groundwater can be effectively prevented from flowing into pile ends and softening rock strata.
Those of ordinary skill in the art will appreciate that: the discussion of any of the embodiments above is merely exemplary and is not intended to suggest that the scope of the disclosure is limited to these examples; the technical features of the above embodiments or in the different embodiments may also be combined within the idea of the invention, the steps may be implemented in any order and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.
The embodiments of the invention are intended to embrace all such alternatives, modifications and variances which fall within the broad scope of the appended claims. Therefore, any omission, modification, equivalent replacement, improvement, etc. of the present invention should be included in the scope of the present invention.
Claims (6)
1. The utility model provides a precast concrete tubular pile stake core hole sealing device which characterized in that includes: the novel anti-theft device comprises a top plate (6), wherein a through hole is formed in the top plate (6), a bottom plate (8) is arranged below the top plate (6), a connecting piece penetrating through the through hole is connected to the bottom plate (8), a blocking piece is arranged between the top plate (6) and the bottom plate (8), the blocking piece is sleeved outside the connecting piece, an elastic ring is sleeved outside the blocking piece, an extrusion piece positioned above the top plate (6) is arranged on the connecting piece, and the extrusion piece is used for enabling the top plate (6) to move downwards to shorten the distance between the top plate (6) and the bottom plate (8), and further extruding the elastic ring to enable the elastic ring to deform outwards;
The through hole is formed in the central position of the top plate (6), the connecting piece is a screw (12), the lower end of the screw (12) is connected with the central position of the bottom plate (8), and the extrusion piece is a hand-screwed nut handle (11) which is connected with the screw (12) in a matching way;
The baffle comprises an upper annular rib (7) connected with the lower end face of the top plate (6), a lower annular rib (9) connected with the upper end face of the bottom plate (8) is arranged obliquely below the upper annular rib (7), and the diameter of the inner ring of the upper annular rib (7) is larger than that of the outer ring of the lower annular rib (9).
2. A precast concrete tubular pile core sealing device according to claim 1, characterized in that the top plate (6) is provided with an upper handle (10).
3. A precast concrete tubular pile core sealing device according to claim 2, characterized in that a control telescopic rod is arranged between the upper handle (10) and the top plate (6).
4. The precast concrete tubular pile core hole sealing device according to claim 1, wherein the outer side of the upper end of the upper annular rib (7) is fixedly connected with the top plate (6) through an upper welding node (4), and the inner side of the lower end of the lower annular rib (9) is fixedly connected with the bottom plate (8) through a lower welding node (5).
5. A precast concrete tubular pile core sealing device according to claim 1, characterized in that the lower end of the upper annular rib (7) is in the shape of a blade foot.
6. A precast concrete tubular pile core sealing device according to claim 1, characterized in that the elastic ring is a sealing ring (13) or an inflatable ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210001932.2A CN114482017B (en) | 2022-01-04 | 2022-01-04 | Precast concrete tubular pile stake core hole sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210001932.2A CN114482017B (en) | 2022-01-04 | 2022-01-04 | Precast concrete tubular pile stake core hole sealing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114482017A CN114482017A (en) | 2022-05-13 |
| CN114482017B true CN114482017B (en) | 2024-04-19 |
Family
ID=81509827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210001932.2A Active CN114482017B (en) | 2022-01-04 | 2022-01-04 | Precast concrete tubular pile stake core hole sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114482017B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2865078A (en) * | 1955-06-27 | 1958-12-23 | Tryckror Ab | Device for use in the manufacture of spigot and socket pipes of concrete having pre-tensioned reinforcements |
| JP2003041575A (en) * | 2001-08-02 | 2003-02-13 | Tobishima Corp | Water flow hole forming apparatus and method for forming water flow holes used for water flow hole formation for maintaining groundwater flow in impermeable walls |
| FR2875286A1 (en) * | 2004-09-13 | 2006-03-17 | Saltel Ind Soc Par Actions Sim | Oil well or pipeline sealing device for petroleum industry, has fibrous annular structure with fibers, having high mechanical resistance, helically wounding around inner membrane to reduce fiber density from ends towards central portion |
| KR101226948B1 (en) * | 2012-03-07 | 2013-01-28 | 주식회사종합건축사사무소가람건축 | Device for blocking hollow of precast concrete pile |
| AU2013245456A1 (en) * | 2012-10-17 | 2014-05-01 | Patented Foundations Pty Ltd | Plug connector for piles |
| CN109578740A (en) * | 2019-01-23 | 2019-04-05 | 崔建国 | A kind of duct closing type device |
| CN210766737U (en) * | 2019-08-27 | 2020-06-16 | 中国一冶集团有限公司 | End part plugging structure of prestressed pipe pile |
| CN211143053U (en) * | 2019-08-27 | 2020-07-31 | 中铁第四勘察设计院集团有限公司 | Pretensioned prestressed concrete pipe pile |
| CN111794226A (en) * | 2020-07-11 | 2020-10-20 | 广州协安建设工程有限公司 | Rapid bottom sealing construction method for precast tubular pile core foamed polyurethane |
| CN113339604A (en) * | 2021-06-21 | 2021-09-03 | 中建八局第二建设有限公司 | Anti-seepage device for water supply and drainage pipes in building engineering |
-
2022
- 2022-01-04 CN CN202210001932.2A patent/CN114482017B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2865078A (en) * | 1955-06-27 | 1958-12-23 | Tryckror Ab | Device for use in the manufacture of spigot and socket pipes of concrete having pre-tensioned reinforcements |
| JP2003041575A (en) * | 2001-08-02 | 2003-02-13 | Tobishima Corp | Water flow hole forming apparatus and method for forming water flow holes used for water flow hole formation for maintaining groundwater flow in impermeable walls |
| FR2875286A1 (en) * | 2004-09-13 | 2006-03-17 | Saltel Ind Soc Par Actions Sim | Oil well or pipeline sealing device for petroleum industry, has fibrous annular structure with fibers, having high mechanical resistance, helically wounding around inner membrane to reduce fiber density from ends towards central portion |
| KR101226948B1 (en) * | 2012-03-07 | 2013-01-28 | 주식회사종합건축사사무소가람건축 | Device for blocking hollow of precast concrete pile |
| AU2013245456A1 (en) * | 2012-10-17 | 2014-05-01 | Patented Foundations Pty Ltd | Plug connector for piles |
| CN109578740A (en) * | 2019-01-23 | 2019-04-05 | 崔建国 | A kind of duct closing type device |
| CN210766737U (en) * | 2019-08-27 | 2020-06-16 | 中国一冶集团有限公司 | End part plugging structure of prestressed pipe pile |
| CN211143053U (en) * | 2019-08-27 | 2020-07-31 | 中铁第四勘察设计院集团有限公司 | Pretensioned prestressed concrete pipe pile |
| CN111794226A (en) * | 2020-07-11 | 2020-10-20 | 广州协安建设工程有限公司 | Rapid bottom sealing construction method for precast tubular pile core foamed polyurethane |
| CN113339604A (en) * | 2021-06-21 | 2021-09-03 | 中建八局第二建设有限公司 | Anti-seepage device for water supply and drainage pipes in building engineering |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114482017A (en) | 2022-05-13 |
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