CN219951919U - Steel bar connecting structure and precast concrete pile - Google Patents
Steel bar connecting structure and precast concrete pile Download PDFInfo
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- CN219951919U CN219951919U CN202321380409.1U CN202321380409U CN219951919U CN 219951919 U CN219951919 U CN 219951919U CN 202321380409 U CN202321380409 U CN 202321380409U CN 219951919 U CN219951919 U CN 219951919U
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- steel bar
- steel
- precast concrete
- concrete pile
- structural adhesive
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 225
- 239000010959 steel Substances 0.000 title claims abstract description 225
- 239000011178 precast concrete Substances 0.000 title claims abstract description 81
- 239000000853 adhesive Substances 0.000 claims abstract description 68
- 230000001070 adhesive effect Effects 0.000 claims abstract description 68
- 239000004567 concrete Substances 0.000 claims description 7
- 239000007787 solid Substances 0.000 description 6
- 239000011513 prestressed concrete Substances 0.000 description 3
- 210000002435 tendon Anatomy 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Piles And Underground Anchors (AREA)
Abstract
The utility model discloses a steel bar connecting structure and a precast concrete pile, wherein the steel bar connecting structure comprises a first steel bar, a second steel bar and a steel bar sleeve joint; a structural adhesive accommodating cavity is arranged in the steel bar sleeve joint, and one end of the first steel bar is mechanically connected with one end of the steel bar sleeve joint; structural adhesive is injected into the structural adhesive accommodating cavity, and one end of the second steel rod can be inserted into the structural adhesive accommodating cavity and glued with the steel rod sleeve joint. The screw-thread steel sleeve joint disclosed by the utility model realizes the connection of screw-thread steel (non-prestressed main ribs) at the end surface connection part of the precast concrete pile, further improves the ductility of the pile end surface connection part, improves the capability of the pile connection to be damaged by impact, and simultaneously realizes that the non-prestressed main ribs of a plurality of sections of piles are positioned on the same axis, so that two or more sections of piles have common ductility, further improves the capability of the integral pile connection to be damaged by impact, and prevents a building from being overturned or collapsed when the pile connection is subjected to the impact force.
Description
Technical Field
The utility model relates to the technical field of precast pile connection, in particular to a steel bar connection structure and a precast concrete pile.
Background
In order to delay the problem that the prestressed concrete pile is directly damaged when being subjected to impact force, a mixed reinforcement precast concrete pile is generally adopted, namely the reinforcement of the prestressed concrete pile comprises prestressed tendons and non-prestressed main tendons, so that the high ductility of the non-prestressed main tendons can delay the capability of the pile to be directly damaged when the prestressed concrete pile is subjected to the impact force; however, the existing precast concrete pile cannot be connected with the non-prestressed main ribs at the pile end surface connection position, so that the pile end surface connection position has no ductility, and the pile end surface connection position is easy to be damaged when the connecting pile is impacted, so that the connecting pile and a building are damaged.
Disclosure of Invention
The utility model provides a steel bar connecting structure and a precast concrete pile aiming at the problems.
The utility model adopts the following technical means:
a steel bar connecting structure comprises a first steel bar, a second steel bar and a steel bar sleeve joint;
a structural adhesive accommodating cavity is arranged in the steel bar sleeve joint, one end of the structural adhesive accommodating cavity is a first steel bar connecting end, and the other end of the structural adhesive accommodating cavity is a second steel bar inserting end;
one end of the first steel bar is mechanically connected with the first steel bar connecting end;
structural adhesive is injected into the structural adhesive accommodating cavity, and one end of the second steel rod is inserted into the structural adhesive accommodating cavity from the second steel rod inserting end and is glued with the steel rod sleeve joint.
Further, the first steel bar and the second steel bar are screw steel or PC steel bars;
when the first steel bar and the second steel bar are screw steels, the first steel bar is in screw connection with the connecting end of the first steel bar;
when the first steel bar and the second steel bar are PC steel bars, the first steel bar is connected with the connecting end of the first steel bar through the pier head in a clamping mode.
Further, the inner diameter of the structural adhesive accommodating cavity is 1mm to 3mm larger than the maximum outer diameter of the steel rod.
Further, the depth of the structural adhesive accommodating cavity is more than or equal to 80mm.
Further, the outer wall of the steel bar sleeve joint is also provided with a clamping structure.
Further, the clamping structure is two or more clamping surfaces which are arranged on the outer wall of the steel bar sleeve joint and close to the first steel bar connecting end.
A precast concrete pile comprises a precast concrete pile body, a prestressed main rib and a non-prestressed main rib;
the prestress main rib and the non-prestress main rib are arranged in the precast concrete pile body, the steel bar sleeve joint is arranged in one end of the precast concrete pile body, one end of the non-prestress main rib is connected with the first steel bar connecting end of the steel bar sleeve joint, and the other end of the non-prestress main rib extends out of the other end face of the precast concrete pile body to form a non-prestress main rib inserting part;
when two precast concrete piles are connected, structural adhesive is injected into the structural adhesive accommodating cavity of the steel bar sleeve joint of one precast concrete pile, and the non-prestressed main rib inserting part of the other precast concrete pile is inserted into the structural adhesive accommodating cavity, so that the non-prestressed main ribs at the connecting end faces of the two adjacent precast concrete piles are connected by adopting the steel bar connecting structure.
Further, the precast concrete pile further comprises a first nut sleeve and a second nut sleeve, wherein the first nut sleeve and the second nut sleeve are arranged at two ends of the precast concrete pile body, and two ends of the prestressed main rib are respectively connected with the first nut sleeve and the second nut sleeve.
Further, the precast concrete pile further comprises a first end plate and a second end plate, wherein the first end plate and the second end plate are arranged at two ends of the precast concrete pile body, and two ends of the prestressed main rib are respectively connected with the first end plate and the second end plate.
Further, a mechanical joint for mechanically connecting two adjacent precast concrete piles is also included.
Compared with the prior art, the steel bar connecting structure disclosed by the utility model has the following beneficial effects: the steel bar connecting structure disclosed by the utility model realizes the connection of the non-prestressed main ribs at the end surface connection part of the precast concrete pile, further improves the ductility of the pile end surface connection part, improves the capability of the pile connection to be damaged by impact, and simultaneously ensures that two or more sections of piles have common ductility, further improves the capability of the integral pile connection to be damaged by impact and does not topple or collapse when the pile connection is subjected to impact force.
Drawings
FIG. 1 is a block diagram of a first embodiment of the disclosed steel bar connection structure, wherein the steel bar is screw-threaded steel;
FIG. 2 is a right side view of a steel rod sleeve joint in the steel rod connecting structure disclosed by the utility model;
FIG. 3 is a left side view of a steel rod sleeve joint in the steel rod connecting structure disclosed by the utility model;
FIG. 4 is a block diagram of a second embodiment of the disclosed steel bar connection structure, wherein the steel bar is a PC steel bar;
FIG. 5 is an axial view of a first precast concrete pile according to the present disclosure;
FIG. 6 is a front view of a first precast concrete pile according to the present disclosure;
FIG. 7 is a cross-sectional view of a first precast concrete pile according to the present utility model provided with a non-prestressed main rib (screw-thread steel);
FIG. 8 is a schematic view of a first precast concrete pile of the present disclosure after connection, wherein the mechanical joints and structural adhesive are not shown;
FIG. 9 is an axial view of a second precast concrete pile according to the present disclosure;
FIG. 10 is a front view of a second precast concrete pile according to the present disclosure;
FIG. 11 is a right side view of FIG. 10;
FIG. 12 is a cross-sectional view taken at A-A of FIG. 11;
fig. 13 is a sectional view at B-B of fig. 11.
In the figure: 1. a steel bar sleeve joint; 10. a structural adhesive accommodating cavity; 11. the first steel bar connecting end; 12. the second steel bar insertion end; 13. structural adhesive; 14. a first steel bar; 15. a second steel bar; 16. a clamping surface; 2. prefabricating concrete piles; 20. prefabricating a concrete pile body; 21. prestress main ribs; 22. a non-prestressed main rib; 23. a non-prestressed main rib plug-in part; 30. a first nut sleeve; 31. a second nut sleeve; 40. a first end plate; 41. a second end plate; 42. a mechanical joint fixing hole; 43. prestress main rib fixing holes; 44. and a through hole.
Detailed Description
Example 1
As shown in fig. 1, 2 and 3, a first embodiment of the steel rod connecting structure disclosed in the present utility model includes a first steel rod 14, a second steel rod 15 and a steel rod sleeve joint 1, in this embodiment, the first steel rod 14 and the second steel rod 15 are all screw steels;
a structural adhesive accommodating cavity 10 is arranged in the steel bar sleeve joint 1, one end of the structural adhesive accommodating cavity 10 is a first steel bar connecting end 11, and the other end is a second steel bar inserting end 12;
one end of the first steel bar 14 is in threaded connection with the first steel bar connecting end 11;
the structural adhesive 13 is injected into the structural adhesive accommodating cavity 10, and one end of the second steel rod 15 is inserted into the structural adhesive accommodating cavity 10 from the second steel rod inserting end 12 and is glued with the steel rod sleeve joint 1.
Specifically, in this embodiment, the first steel rod 14 and the second steel rod 15 are both threaded steel, one end of the steel rod sleeve joint protrudes inwards along the radial direction, an inner thread is machined on the inner diameter wall of the protruding portion to form the first steel rod connecting end 11, one end of the threaded steel can be processed to form an outer thread on the outer diameter after being processed, the threaded steel can be in threaded connection with the first steel rod connecting end, a structural adhesive accommodating cavity 10 is arranged in the steel rod sleeve joint 1, structural adhesive can be injected into the structural adhesive accommodating cavity, and after the structural adhesive is injected, the unprocessed end of the other threaded steel is inserted into the structural adhesive accommodating cavity, and after the structural adhesive is solidified, connection of the two threaded steels can be achieved.
Further, the inner diameter of the structural adhesive accommodating cavity 10 is 1mm to 3mm larger than the maximum outer diameter of the steel rod (deformed steel bar), and the depth of the structural adhesive accommodating cavity 12 is 80mm or more, so that the deformed steel bar inserted into the structural adhesive accommodating cavity and the steel rod sleeve joint have good connection performance.
Further, the outer wall of the steel bar sleeve joint is also provided with a clamping structure. In this embodiment, the clamping structure is two or more clamping surfaces 13 on the outer wall of the steel bar sleeve joint, which are close to the first steel bar connecting end, and the number of the clamping surfaces in the figure is 3, and by setting the clamping structure, the clamping tool can be conveniently used for clamping the steel bar sleeve joint so as to be in threaded connection with the threaded steel.
Example 2
Fig. 4 shows a second embodiment of the steel bar connecting structure disclosed by the utility model, which comprises a first steel bar 14, a second steel bar 15 and a steel bar sleeve joint 1, wherein in the embodiment, the first steel bar 14 and the second steel bar 15 are both PC steel bars;
a structural adhesive accommodating cavity 10 is arranged in the steel bar sleeve joint 1, one end of the structural adhesive accommodating cavity 10 is a first steel bar connecting end 11, and the other end is a second steel bar inserting end 12;
one end of the first steel bar 14 is fixedly connected with the first steel bar connecting end 11 in a clamping way;
the structural adhesive 13 is injected into the structural adhesive accommodating cavity 10, and one end of the second steel rod 15 is inserted into the structural adhesive accommodating cavity 10 from the second steel rod inserting end 12 and is glued with the steel rod sleeve joint 1.
Specifically, in this embodiment, the first steel rod 14 and the second steel rod 15 are PC steel sides, one end of the steel rod sleeve joint protrudes inwards along the radial direction and forms a conical clamping structure, one end provided with the conical clamping structure is a first steel rod connecting end 11, one end of the PC steel rod extends into the steel rod sleeve joint and is processed by the pier to form a pier, the PC steel rod and the steel rod sleeve joint are connected through the pier, a structural adhesive accommodating cavity 10 is arranged in the steel rod sleeve joint 1, structural adhesive can be injected into the structural adhesive accommodating cavity, one end of another PC steel rod is inserted into the structural adhesive accommodating cavity after the structural adhesive is injected, and connection of two PC steel rods can be achieved after the structural adhesive is solidified.
Further, the inner diameter of the structural adhesive accommodating cavity 10 is 1mm to 3mm larger than the maximum outer diameter of the steel rod (PC steel rod), and the depth of the structural adhesive accommodating cavity 12 is 80mm or more, so that the PC steel rod inserted into the structural adhesive accommodating cavity has better connection performance with the steel rod sleeve joint.
Example 3
Referring to fig. 5, 6, 7 and 8, a first embodiment of the precast concrete pile according to the present disclosure includes a precast concrete pile body 20, a prestressed main rib 21, a non-prestressed main rib 22, a first nut sleeve 30 and a second nut sleeve 31;
the pre-stressing main rib 21 and the non-pre-stressing main rib 22 are arranged in the precast concrete pile body 20, specifically, the first nut sleeve 30 and the second nut sleeve 31 are arranged at two ends of the precast concrete pile body 20, a mechanical joint for mechanically connecting two adjacent precast concrete piles 2 is further installed in the first nut sleeve 30 and the second nut sleeve 31, the mechanical joint can adopt any one of the existing structures, two ends of the pre-stressing main rib 21 are respectively connected with the first nut sleeve 30 and the second nut sleeve 31, in the embodiment, the pre-stressing main rib is a PC steel rod, other forms of pre-stressing main ribs can also be adopted, the non-pre-stressing main rib 22 is a screw steel or a PC steel rod, and in the figure, the non-pre-stressing main rib is a screw steel;
the steel bar sleeve joint 1 is arranged in one end of the precast concrete pile body 20, one end of the non-prestressed main rib 22 is connected with the first steel bar connecting end 11 of the steel bar sleeve joint 1, in the figure, the screw thread steel is in screw thread connection with the first steel bar connecting end of the steel bar sleeve joint, the length of the screw thread steel is longer than that of the precast concrete pile body 20, and the other end of the screw thread steel extends out of the other end face of the precast concrete pile body 20 to form a non-prestressed main rib inserting part 23;
when two precast concrete piles 2 are connected, structural adhesive is injected into the structural adhesive accommodating cavity 10 of the steel bar sleeve joint 1 of one precast concrete pile, and before the structural adhesive is not solidified, the non-prestressed main rib inserting part 23 of the other precast concrete pile is inserted into the structural adhesive accommodating cavity 10, so that the non-prestressed main ribs at the connecting end faces of the two adjacent precast concrete piles are connected by adopting the steel bar connecting structure.
According to the precast concrete pile disclosed by the utility model, as the steel bar sleeve joint is arranged at one end of the concrete pile body, one end of the non-prestressed main rib (screw thread steel) is in threaded connection with the steel bar sleeve joint, and the other end of the non-prestressed main rib (screw thread steel) extends out of the end face of the precast concrete pile to form the non-prestressed main rib inserting part, when the precast concrete pile is connected, the non-prestressed main rib inserting part can be inserted into the structural adhesive accommodating cavity of the steel bar sleeve joint at the end part of the adjacent precast concrete pile and is adhered and fixed by the structural adhesive, so that the connection of the non-prestressed main ribs at the connection part of the pile end faces is realized, the ductility of the connection part of the pile end faces is improved, the capability of the pile connection is improved, and meanwhile, the non-prestressed main ribs of the multi-section pile are positioned on the same axis, so that two sections or multiple sections of piles have common ductility, and the capability of the whole pile connection is further improved, and the pile connection is not prone to being overturned or collapsed when the pile connection is subjected to impact force.
The precast concrete pile disclosed by the utility model can be square piles, tubular piles, special-shaped piles, solid piles or hollow piles and the like.
The number, arrangement form, model and the like of the prestressed main ribs and the non-prestressed main ribs (deformed steel bars) in the precast concrete pile disclosed by the embodiment can be adjusted as required, in the embodiment, the precast concrete pile is a solid square pile, the number of the deformed steel bars is 4, the 4 deformed steel bars and the plurality of prestressed main ribs are arranged in a rectangular mode, and the 4 deformed steel bars are arranged at 4 corners of the solid square pile. The screw thread steel and the prestress main bars can also be alternately arranged, namely 1 or more prestress main bars are arranged between two adjacent screw thread steels; the prestress main rib and the screw steel can be arranged in a plurality of circles.
Example 4
A second embodiment of the precast concrete pile according to the present disclosure is shown in fig. 9, 10, 11, 12 and 13, including a precast concrete pile body 20, a prestressed main rib 21, a non-prestressed main rib 22, a first end plate 40 and a second end plate 41;
the pre-stressed main bars 21 and the non-pre-stressed main bars 22 are arranged in the precast concrete pile body 20, in this embodiment, the pre-stressed main bars 21 are PC steel bars, or may be pre-stressed main bars of other forms, the non-pre-stressed main bars 22 are PC steel bars or screw-thread steel, in the figure, the non-pre-stressed main bars are screw-thread steel, specifically, the first end plate 40 and the second end plate 41 are arranged at two ends of the precast concrete pile body 20, the first end plate 40 and the second end plate 41 are provided with pre-stressed main bar fixing holes 43 and through holes 44, two ends of the pre-stressed main bars 21 are fixed in the pre-stressed main bar fixing holes 43, the positions of the through holes 44 correspond to the positions of the non-pre-stressed main bars (screw-thread steel), one end of the precast concrete pile body 20 is internally provided with the steel bar sleeve joint 1, and one end of the screw-thread steel is in screw-thread connection with the first steel bar connection end of the steel bar sleeve joint 1, and the length of the screw-thread steel is longer than that of the precast concrete pile body 20, so that the other end plate extends out of the other pre-stressed main bar 2 from the screw-thread plate to form a non-stressed concrete pile body;
when two precast concrete piles 2 are connected, structural adhesive is injected into the structural adhesive accommodating cavity 10 of the steel bar sleeve joint 1 of one precast concrete pile, and before the structural adhesive is not solidified, the non-prestressed main rib inserting part 23 of the other precast concrete pile is inserted into the structural adhesive accommodating cavity 10, so that the non-prestressed main ribs at the connecting end faces of the two adjacent precast concrete piles are connected by adopting the steel bar connecting structure.
According to the precast concrete pile disclosed by the utility model, as the steel bar sleeve joint is arranged at one end of the concrete pile body, one end of the non-prestressed main rib (screw thread steel) is in threaded connection with the steel bar sleeve joint, and the other end of the non-prestressed main rib (screw thread steel) extends out of the end face of the precast concrete pile to form the non-prestressed main rib inserting part, when the precast concrete pile is connected, the non-prestressed main rib inserting part can be inserted into the structural adhesive accommodating cavity of the steel bar sleeve joint at the end part of the adjacent precast concrete pile and is adhered and fixed by the structural adhesive, so that the connection of the non-prestressed main ribs at the connection part of the pile end faces is realized, the ductility of the connection part of the pile end faces is improved, the capability of the pile connection is improved, and meanwhile, the non-prestressed main ribs of the multi-section pile are positioned on the same axis, so that two sections or multiple sections of piles have common ductility, and the capability of the whole pile connection is further improved, and the pile connection is not prone to being overturned or collapsed when the pile connection is subjected to impact force.
The precast concrete pile disclosed by the utility model can be square piles, tubular piles, special-shaped piles, solid piles or hollow piles and the like.
The number, arrangement form, model and the like of the prestressed main ribs and the non-prestressed main ribs (deformed steel bars) in the precast concrete pile disclosed by the embodiment can be adjusted as required, in the embodiment, the precast concrete pile is a solid square pile, the number of the deformed steel bars is 4, the 4 deformed steel bars and the plurality of prestressed main ribs are arranged in a rectangular mode, and the 4 deformed steel bars are arranged at 4 corners of the solid square pile. The screw thread steel and the prestress main bars can also be alternately arranged, namely 1 or more prestress main bars are arranged between two adjacent screw thread steels; the prestress main rib and the screw steel can be arranged in a plurality of circles.
Further, in this embodiment, two adjacent precast concrete piles may be connected by a mechanical joint or welded by an end plate.
The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.
Claims (10)
1. A steel bar connection structure, its characterized in that: comprises a first steel bar (14), a second steel bar (15) and a steel bar sleeve joint (1);
a structural adhesive accommodating cavity (10) is arranged in the steel bar sleeve joint (1), one end of the structural adhesive accommodating cavity (10) is a first steel bar connecting end (11), and the other end is a second steel bar inserting end (12);
one end of the first steel bar (14) is mechanically connected with the first steel bar connecting end (11);
structural adhesive (13) is injected into the structural adhesive accommodating cavity (10), and one end of the second steel rod (15) is inserted into the structural adhesive accommodating cavity (10) from the second steel rod inserting end (12) and is glued with the steel rod sleeve joint (1).
2. The steel bar connecting structure according to claim 1, wherein: the first steel bar (14) and the second steel bar (15) are screw steel or PC steel bars;
when the first steel bar (14) and the second steel bar (15) are screw-threaded steel, the first steel bar (14) is in screw-threaded connection with the first steel bar connecting end (11);
when the first steel bar (14) and the second steel bar (15) are PC steel bars, the first steel bar (14) and the first steel bar connecting end (11) are connected through pier heads in a clamping mode.
3. The steel bar connecting structure according to claim 1 or 2, wherein: the inner diameter of the structural adhesive accommodating cavity (10) is 1mm to 3mm larger than the maximum outer diameter of the steel rod.
4. A steel bar connecting structure according to claim 3, wherein: the depth of the structural adhesive accommodating cavity (10) is more than or equal to 80mm.
5. The steel bar connecting structure according to claim 4, wherein: and a clamping structure is further arranged on the outer wall of the steel bar sleeve joint.
6. The steel bar connecting structure according to claim 5, wherein: the clamping structure is two or more clamping surfaces (16) which are arranged on the outer wall of the steel bar sleeve joint and close to the first steel bar connecting end.
7. A precast concrete pile, characterized in that: comprises a precast concrete pile body (20), a prestressed main rib (21) and a non-prestressed main rib (22);
the pre-stressed main rib (21) and the non-pre-stressed main rib (22) are arranged in the precast concrete pile body (20), the steel bar sleeve joint (1) is arranged in one end of the precast concrete pile body (20), one end of the non-pre-stressed main rib (22) is connected with the first steel bar connecting end (11) of the steel bar sleeve joint (1), and the other end of the non-pre-stressed main rib (22) extends out of the other end face of the precast concrete pile body (20) to form a non-pre-stressed main rib inserting part (23);
when two precast concrete piles (2) are connected, structural adhesive (13) is injected into the structural adhesive accommodating cavity (10) of the steel bar sleeve joint (1) of one precast concrete pile (2), and the non-prestressed main rib inserting part (23) of the other precast concrete pile (2) is inserted into the structural adhesive accommodating cavity (10), so that the non-prestressed main rib at the connecting end face of the two adjacent precast concrete piles (2) is connected by adopting the steel bar connecting structure according to any one of claims 1 to 6.
8. A precast concrete pile according to claim 7, characterized in that: the concrete pile further comprises a first nut sleeve (30) and a second nut sleeve (31), wherein the first nut sleeve (30) and the second nut sleeve (31) are arranged at two ends of the precast concrete pile body (20), and two ends of the prestressed main rib (21) are respectively connected with the first nut sleeve (30) and the second nut sleeve (31).
9. A precast concrete pile according to claim 7, characterized in that: the concrete pile further comprises a first end plate (40) and a second end plate (41), wherein the first end plate (40) and the second end plate (41) are arranged at two ends of the precast concrete pile body (20), and two ends of the prestressed main rib (21) are respectively connected with the first end plate (40) and the second end plate (41).
10. Precast concrete pile according to claim 8 or 9, characterized in that: and the mechanical joint is used for mechanically connecting two adjacent precast concrete piles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321380409.1U CN219951919U (en) | 2023-05-31 | 2023-05-31 | Steel bar connecting structure and precast concrete pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321380409.1U CN219951919U (en) | 2023-05-31 | 2023-05-31 | Steel bar connecting structure and precast concrete pile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219951919U true CN219951919U (en) | 2023-11-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321380409.1U Active CN219951919U (en) | 2023-05-31 | 2023-05-31 | Steel bar connecting structure and precast concrete pile |
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| Country | Link |
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| CN (1) | CN219951919U (en) |
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- 2023-05-31 CN CN202321380409.1U patent/CN219951919U/en active Active
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