CN203768893U - End plate-reusable mechanical connecting pile head of prefabricated concrete pile - Google Patents
End plate-reusable mechanical connecting pile head of prefabricated concrete pile Download PDFInfo
- Publication number
- CN203768893U CN203768893U CN201420128769.7U CN201420128769U CN203768893U CN 203768893 U CN203768893 U CN 203768893U CN 201420128769 U CN201420128769 U CN 201420128769U CN 203768893 U CN203768893 U CN 203768893U
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- Prior art keywords
- end plate
- sleeve
- reinforcing bar
- mechanical connection
- pile
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- Expired - Lifetime
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- 239000004567 concrete Substances 0.000 title abstract description 22
- 238000004064 recycling Methods 0.000 claims abstract description 18
- 230000003014 reinforcing effect Effects 0.000 claims description 44
- 229910000831 Steel Inorganic materials 0.000 claims description 21
- 239000010959 steel Substances 0.000 claims description 21
- 239000011178 precast concrete Substances 0.000 claims description 15
- 238000004080 punching Methods 0.000 claims description 15
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 8
- 229920002554 vinyl polymer Polymers 0.000 claims description 8
- 229910000754 Wrought iron Inorganic materials 0.000 claims description 4
- 238000010276 construction Methods 0.000 abstract description 11
- 229910001294 Reinforcing steel Inorganic materials 0.000 abstract 4
- 230000002787 reinforcement Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 10
- 239000007787 solid Substances 0.000 description 10
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 210000003205 muscle Anatomy 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000011513 prestressed concrete Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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- Piles And Underground Anchors (AREA)
Abstract
The utility model discloses an end plate-reusable mechanical connecting pile head of a prefabricated concrete pile. The end plate-reusable mechanical connecting pile head comprises an end plate, a connecting sleeve, a reinforcing steel bar and embedded bolts. The reinforcing steel bar is connected with the connecting sleeve. The end plate is connected with the connecting sleeve. A plurality of high-strength fixing bolt holes, three embedded bolt holes and three plate detaching threaded holes are formed in the end plate. The embedded bolt holes and the plate detaching threaded holes are evenly distributed in the central line of the concentric circle of the end plate. The embedded bolts are mounted in the embedded bolt holes in the end plate which is locked by two nuts. The end plate-reusable mechanical connecting pile head has the advantages that after piling, the pile head can be reused in a next product; during bearing platform construction, the reinforcing steel bar of a bearing platform can be directly screwed into the threaded hole in the connecting sleeve, and fast mechanical connection of the pile head and the reinforcing steel bar of the bearing platform is achieved; the pile head is provided with the detachable end plate which is much higher in strength and toughness than concrete and is higher in impact resistance during construction, and cost lowering and efficiency and quality increasing are achieved favorably by the aid of end plate recycling and pile head mechanical connecting.
Description
Technical field
The utility model relates to a kind of precast concrete pile mechanical connection pile crown, relates in particular to a kind of mechanical connection pile crown of end plate recycling precast concrete pile.
Background technology
The pile tube of existing centrifugal forming, hollow square pile, after pile foundation construction, the main method that pile crown is connected with cushion cap is: on-the-spot cleaning, chisel out the laitance layer of an endoporus, at a pallet of stake endoporus suspention, the reinforcing cage that colligation is good is inserted to endoporus, again endoporus being built to slightly expanded concrete makes endoporus fill out core completely, this construction technology complexity, cycle is long, expense is high, quality control difficulty is large, it is also often not enough that endoporus is filled out core bonding frictional force, especially high in groundwater table, heavy rain draining waits and causes when basement buoyancy is large not in time, core concrete that endoporus is filled out easily separates with pile body, thereby also easily there is basement floating-up, the quality accident of tilting, and the method that solid square pile pile crown is connected with cushion cap mainly: adopt broken pile crown, pull down end plate, expose reinforcing bar, curved reinforcing bar anchor is anchored into cushion cap concreting together with cushion cap reinforcing bar binding, when the shortcoming of this connected mode is broken pile crown, the concrete of pile crown, pile body is had to impact and cause damage, difficulty of construction is large, and efficiency is also very low.Pile for prestressed pipe, the offcenter squared pile of national standard specification have end plate at present, but the non-dismountable recovery of pile crown end plate, and while connection with foundation platform, pile crown end plate all anchors into cushion cap, has wasted steel resources.And solid square pile end plate directly welds with reinforcing bar, when dismounting, to impact pile crown, and dismantle with gas cutting, the easy distortion of end plate can only be regarded scrap iron processing.
Utility model content
The purpose of this utility model is just to provide in order to address the above problem a kind of mechanical connection pile crown of end plate recycling precast concrete pile.
The utility model is achieved through the following technical solutions above-mentioned purpose:
A kind of mechanical connection pile crown of end plate recycling precast concrete pile, comprise end plate, branch sleeve, reinforcing bar and pre-embedded bolt, described reinforcing bar is connected with described branch sleeve, described end plate is connected by high-strength set bolt with described branch sleeve, on described end plate, be provided with multiple high-strength fixed bolt holes, three pre-embedded bolt holes and three plate screwed holes, described pre-embedded bolt hole and described plate screwed hole are distributed on the concentric circles center line of end plate, described pre-embedded bolt is installed in the pre-embedded bolt hole on described end plate also locks described end plate with two nuts, described reinforcing bar is that head is processed into the prestressed reinforcement of Upsetting head shapes or is processed into the indented bars after screw thread, described pre-embedded bolt is common double hook bolt or screw.
If produce the preformed pile of prestressed concrete centrifugal forming, on, spraying one deck interleaving agent in lower punching block, after Steel Reinforcing Bar Material, put on branch sleeve and be processed into Upsetting head at reinforcing bar head again, then work out reinforcing cage, reinforcing cage is put into counterdie, utilize stretch board, anchor plate and high-strength set bolt will install the end plate of pre-embedded bolt, branch sleeve is together with assembling steel reinforcement cage, then by even the concrete preparing feeding in counterdie, upper punching block again closes, with wind big gun locking mold closing screw, carry out again prestressed stretch-draw, after stretch-draw, carry out centrifugal forming, after centrifugal forming, insert curing pool maintenance, preformed pile carries out the demoulding after reaching demoulding strength, remove the high-strength set bolt that stretch-draw anchor is used, change high-strength set bolt that fixed charge method end plate uses and at end plate counterbore internal locking.C80 preformed pile in this way, also needs through autoclave steam pressure, goes out still and be deposited into that final product storage is quiet stops natural curing after concrete reaches C80 intensity, in high-strength fixed bolt hole and pre-embedded bolt hole, rise on plate screwed hole and embed vinyl cover, delivers to building site piling after 3 days.If solid square pile, when reinforcing bar is prestressed reinforcement, after Steel Reinforcing Bar Material, put on branch sleeve and be processed into Upsetting head at reinforcing bar head again, then work out reinforcing cage, reinforcing cage is put into the punching block that sprays interleaving agent, utilize stretch board, anchor plate and high-strength set bolt by the end plate, branch sleeve that install pre-embedded bolt together with assembling steel reinforcement cage, then carry out prestressed stretch-draw, if nonprestressed reinforcement (screw-thread steel), head at screw-thread steel is processed into screw thread, then work out reinforcing cage, reinforcing cage is put into the punching block that sprays interleaving agent, before and after utilizing, anchor plate and high-strength set bolt will install the end plate of pre-embedded bolt, branch sleeve is together with assembling steel reinforcement cage, then by even the concrete preparing feeding in punching block, employing is vibrated or self-compaction moulding, through natural curing or outside reach demoulding strength after heating and moistening maintenance after the demoulding, remove the high-strength set bolt that anchoring is used, change high-strength set bolt that fixed charge method end plate uses and at end plate counterbore internal locking, in high-strength fixed bolt hole and pre-embedded bolt hole, rise on plate screwed hole and embed vinyl cover, then proceed to that final product storage is quiet stops natural curing.After concrete precast pile piling, remove on end plate the nut of high-strength set bolt, pre-embedded bolt in counter sink, then will play crab bolt and screw in plate screwed hole, by end plate jack-up, recyclable recycling that end plate is intact.
Particularly, described end plate according to from different hexagon socket head cap screw nose end plate and the interior hexagonal flower type sunk screw end plates of being divided into of the connected mode of described branch sleeve.
Particularly, described hexagon socket head cap screw nose end buttress is divided into boss end plate with punching press boss and the platform end plate with punching press boss not according to structure difference, and the inner plane side of described boss end plate is provided with cylindrical boss along the position of described high-strength fixed bolt hole.
Particularly, described branch sleeve is divided into prestressing force sleeve and non-prestressed sleeve, described prestressing force sleeve is connected with described end plate and described high-strength set bolt by PC rod iron, and described non-prestressed sleeve is connected by described high-strength set bolt with described end plate by screw-thread steel.
Particularly, described prestressing force sleeve is circle or polygonal nut sleeve, and an endoporus part for described prestressing force sleeve is the counterbore of prestressed reinforcing bar Upsetting head, and another part is the screwed hole that connects cushion cap reinforcing bar; Described non-prestressed sleeve is circle or polygonal nut sleeve, and a part for the endoporus of described non-prestressed sleeve is that the screwed hole of described screw-thread steel is installed, and another part is the screwed hole that connects cushion cap reinforcing bar.
Particularly, the outside in described pre-embedded bolt hole and the interior outside of described plate screwed hole and the outside of high-strength fixed bolt hole are provided with vinyl cover.This structure is used for preventing that concrete, foreign material etc. from entering in hole in the time producing or construct.
Particularly, the head of described reinforcing bar is processed into Upsetting head or is provided with screw thread.
The beneficial effects of the utility model are:
The mechanical connection pile crown of the utility model end plate recycling precast concrete pile adopts pre-buried branch sleeve and dismountable tip plate configurations, after piling, can pull down end plate and reclaim utilization again, with cushion cap reinforcing bar screw-in branch sleeve internal thread hole, realize pile crown is connected with the Quick mechanical of cushion cap reinforcing bar, the dismountable end plate of pile crown band adopting, end plate intensity, toughness are far above concrete, when construction end plate can be stressed evenly, more shock-resistant, the recovery of end plate, the mechanical connection of pile crown are all conducive to reduce costs, raising efficiency, raising quality.
Brief description of the drawings
Fig. 1 is the structural representation of the end plate of the mechanical connection pile crown of the utility model end plate recycling precast concrete pile;
Fig. 2 is the schematic diagram of boss end plate described in the utility model;
Fig. 3 is the schematic diagram of platform end plate described in the utility model;
Fig. 4 is the schematic diagram of interior hexagonal flower type sunk screw end plate described in the utility model;
Fig. 5 is the schematic diagram in pre-embedded bolt described in the utility model hole;
Fig. 6 is the schematic diagram of described in the utility model plate screwed hole;
Fig. 7 is the schematic diagram of prestressing force sleeve described in the utility model;
Fig. 8 is the schematic diagram of non-prestressed sleeve described in the utility model;
Fig. 9 is the schematic diagram of PC rod iron described in the utility model;
Figure 10 is the schematic diagram that nonprestressed reinforcement of the present utility model connects described end plate.
Figure 11 is the schematic diagram that prestressed reinforcement of the present utility model connects described end plate.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As Fig. 1, Fig. 5, Fig. 6, shown in Figure 10 and Figure 11, the utility model end plate 1 reuses the mechanical connection pile crown of precast concrete pile, comprise end plate 1, branch sleeve (is made up of prestressing force sleeve 5 and non-prestressed sleeve 6, unmarked in figure), reinforcing bar 9 and pre-embedded bolt 11, reinforcing bar 9 is connected with branch sleeve, end plate 1 is connected by high-strength set bolt 10 with branch sleeve, on end plate 1, be provided with multiple high-strength fixed bolt holes 2, three pre-embedded bolt holes 3 and three plate screwed holes 4, pre-embedded bolt hole 3 and a plate screwed hole 4 are distributed on the concentric circles center line of end plate 1, pre-embedded bolt 11 is installed in the pre-embedded bolt hole 3 on end plate 1 also locks end plate 1 with two nuts, reinforcing bar 9 is processed into the prestressed reinforcement of Upsetting head shapes or is processed into the indented bars after screw thread for head, the inner side of pre-embedded bolt hole 3 and a plate screwed hole 4 is provided with vinyl cover.
As shown in Figure 2, Figure 3 and Figure 4, end plate 1 according to from different hexagon socket head cap screw nose end plate 2-2 and the interior hexagonal flower type sunk screw end plate 2-3 of being divided into of the connected mode of branch sleeve, hexagon socket head cap screw nose end buttress is divided into boss end plate 2-1 with punching press boss and the platform end plate 2-2 with punching press boss not according to structure difference, and the inner plane side of boss end plate 2-1 is provided with cylindrical boss along the position of high-strength fixed bolt hole 2.
As shown in Figure 7, Figure 8 and Figure 9, branch sleeve is divided into prestressing force sleeve 5 and non-prestressed sleeve 6, prestressing force sleeve 5 is connected with end plate 1 and high-strength set bolt 10 by PC rod iron 7, non-prestressed sleeve 6 is connected by high-strength set bolt 10 with end plate 1 by screw-thread steel, prestressing force sleeve 5 is circle or polygonal nut sleeve, an endoporus part for prestressing force sleeve 5 is the counterbore of prestressed reinforcing bar Upsetting head, and another part is the screwed hole that connects cushion cap reinforcing bar; Non-prestressed sleeve is circle or polygonal nut sleeve, and a part for the endoporus of non-prestressed sleeve 6 is that the screwed hole 6-1 of screw-thread steel is installed, and another part is the screwed hole 6-2 that connects cushion cap reinforcing bar.
Manufacture method of the present utility model, comprises the following steps:
(1) utilize anchor plate and connecting bolt by the end plate of special construction 1, branch sleeve together with assembling steel reinforcement cage, again the reinforcing cage assembling is put into counterdie, in counterdie, assemble together with stretch board, anchor plate, then by even the concrete configuring feeding in counterdie, complete concrete pile through after a period of time, after by concrete pile piling, remove the nut of connecting bolt on end plate 1, to play crab bolt has screwed in plate screwed hole 4 again, by end plate 1 jack-up, recyclable recycling that end plate 1 is intact.
(2) Pretensioned spun concrete piles or offcenter squared pile, brushing interleaving agent after counterdie cleaning; , put in a prestressed steel bar Upsetting front with heavy empty branch sleeve prestressed steel bar blanking by automatic steel bar shears fixed length; Recycling anchor plate and connecting bolt by the end plate of special construction 1, branch sleeve together with assembling steel reinforcement cage; On the end plate 1 of special construction, also have pre-embedded bolt hole 3, play plate screwed hole 4, pre-buried stud in the inner part, in the heavy sky of end plate 1, use nut check, in the time of concreting, wrapped up pre-buried, the reinforcing cage assembling is put into counterdie, in counterdie, assembles together with stretch board, anchor plate, by even the concrete configuring feeding in counterdie, then the patrix that closes, locking die bolt.
(3) punching block is put on centrifuge and carried out centrifugal forming by centrifuging process system, after centrifugal end, concrete can be separated out cement paste, punching block one end is raised more than one meter, the other end embeds rubber stopper, and the quiet cement paste that stops endoporus after 2 hours just focuses on this end and plays endoporus concrete and fill out core effect, auxiliary reinforce pile crown effect; The stake of gang mould band is placed in curing pool by quiet the stopping after 2 hours of process stipulation and adopts atmospheric steam curing.
(4) reach after demoulding strength to stake put, the demoulding, pull down and change the interior hexagonal dormant bolt of fixed charge method end plate 1 use or the fastening end plate 1 of the hexagon socket countersunk flat cap head screw pile crown concrete end face of fitting after stretching screw, and embed vinyl cover, so that end plate 1 is not loosening, shock-resistant when piling, bolt hole is not stopped up and is convenient to cleaning by earth;
(5) after piling, after excavation pile crown, the foreign material such as vinyl cover, earth in around cleaning pile crown and dormant bolt hole, craft thread sky; The nut of removing dormant bolt, sunk screw and fixing pre-buried stud, will play symmetrically and evenly crab bolt and screw in plate screwed hole 4, by end plate 1 jack-up, and recyclable recycling that end plate 1 is intact;
For solid square pile, generally non-prestressed, the main muscle of reinforcing cage is screw-thread steel, also be being threaded in branch sleeve nut main muscle end plate 1 in advance, pass through again countersunk head connecting bolt by end plate 1, branch sleeve, be anchored on punching block, treat concreting, maintenance just reaches after demoulding strength can the demoulding, after solid square pile construction, remove dormant bolt, the nut of fixing stud, having rotated crab bolt disassembles end plate 1, this end plate 1 can recycle and reuse next group product equally, the connection of solid square pile and cushion cap is same is threaded into branch sleeve with cushion cap reinforcing bar upper end, reach fast and reliable mechanical connection, low-cost high-efficiency.
For solid square pile, if prestressed concrete member, manufacture method except concrete be not centrifugal forming, other manufacturing process is basic identical.Solid square pile major part is non-prestressed concrete member, the main muscle of reinforcing cage 12 is screw-thread steel 9, also be being threaded in branch sleeve screwed hole main muscle 9 heads in advance, end plate 1, reinforcing cage 9, branch sleeve are anchored on punching block by connecting bolt with anchor plate again, just can the demoulding after concreting, maintenance reach demoulding strength, pull down and change the interior hexagonal dormant bolt of high-strength set bolt one of fixed charge method end plate 1 use or the fastening end plate 1 of the sunk screw pile crown concrete end face of fitting after connecting bolt, and embed vinyl cover.After solid square pile construction, remove dormant bolt on pile crown end plate 1, pre-embedded bolt outboard nut, rotated crab bolt end plate 1 disassembled, this end plate 1 can recycle and reuse next group product equally, the connection of solid square pile and cushion cap is same to be threaded in branch sleeve internal thread hole with cushion cap reinforcing bar upper end, reach fast and reliable mechanical connection, low-cost high-efficiency.
Claims (7)
1. the mechanical connection pile crown of an end plate recycling precast concrete pile, it is characterized in that: comprise end plate, branch sleeve, reinforcing bar and pre-embedded bolt, described reinforcing bar is connected with described branch sleeve, described end plate is connected by high-strength set bolt with described branch sleeve, on described end plate, be provided with multiple high-strength fixed bolt holes, three pre-embedded bolt holes and three plate screwed holes, described pre-embedded bolt hole and described plate screwed hole are distributed on the concentric circles center line of end plate, described pre-embedded bolt is installed in the pre-embedded bolt hole on described end plate also locks described end plate with two nuts.
2. the mechanical connection pile crown of a kind of end plate recycling precast concrete pile according to claim 1, is characterized in that: described end plate according to from different hexagon socket head cap screw nose end plate and the interior hexagonal flower type sunk screw end plates of being divided into of the connected mode of described branch sleeve.
3. the mechanical connection pile crown of a kind of end plate recycling precast concrete pile according to claim 2, it is characterized in that: described hexagon socket head cap screw nose end buttress is divided into boss end plate with punching press boss and the platform end plate with punching press boss not according to structure difference, and the inner plane side of described boss end plate is provided with cylindrical boss along the position of described high-strength fixed bolt hole.
4. the mechanical connection pile crown of a kind of end plate recycling precast concrete pile according to claim 1, it is characterized in that: described branch sleeve is divided into prestressing force sleeve and non-prestressed sleeve, described prestressing force sleeve is connected with described end plate and described high-strength set bolt by PC rod iron, and described non-prestressed sleeve is connected by described high-strength set bolt with described end plate by screw-thread steel.
5. the mechanical connection pile crown of a kind of end plate recycling precast concrete pile according to claim 4, it is characterized in that: described prestressing force sleeve is circle or polygonal nut sleeve, an endoporus part for described prestressing force sleeve is the counterbore of prestressed reinforcing bar Upsetting head, and another part is the screwed hole that connects cushion cap reinforcing bar; Described non-prestressed sleeve is circle or polygonal nut sleeve, and a part for the endoporus of described non-prestressed sleeve is that the screwed hole of described screw-thread steel is installed, and another part is the screwed hole that connects cushion cap reinforcing bar.
6. the mechanical connection pile crown of a kind of end plate recycling precast concrete pile according to claim 1, is characterized in that: the interior outside of described plate screwed hole and the outside in pre-embedded bolt hole are provided with vinyl cover.
7. the mechanical connection pile crown of a kind of end plate recycling precast concrete pile according to claim 1, is characterized in that: the head of described reinforcing bar is processed into Upsetting head or is provided with screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420128769.7U CN203768893U (en) | 2014-03-21 | 2014-03-21 | End plate-reusable mechanical connecting pile head of prefabricated concrete pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420128769.7U CN203768893U (en) | 2014-03-21 | 2014-03-21 | End plate-reusable mechanical connecting pile head of prefabricated concrete pile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203768893U true CN203768893U (en) | 2014-08-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420128769.7U Expired - Lifetime CN203768893U (en) | 2014-03-21 | 2014-03-21 | End plate-reusable mechanical connecting pile head of prefabricated concrete pile |
Country Status (1)
| Country | Link |
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| CN (1) | CN203768893U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103866761A (en) * | 2014-03-21 | 2014-06-18 | 李全民 | Mechanical connection pile head using repetitively used precast concrete pile as end plate and manufacturing method of mechanical connection pile head |
| CN104278668A (en) * | 2014-10-20 | 2015-01-14 | 顾孙平 | Embedded iron member and anchor bar connecting structure |
| CN107989036A (en) * | 2017-12-29 | 2018-05-04 | 汤始建华建材（南通）有限公司 | A kind of new end-plate-free sleeve stake |
-
2014
- 2014-03-21 CN CN201420128769.7U patent/CN203768893U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103866761A (en) * | 2014-03-21 | 2014-06-18 | 李全民 | Mechanical connection pile head using repetitively used precast concrete pile as end plate and manufacturing method of mechanical connection pile head |
| CN104278668A (en) * | 2014-10-20 | 2015-01-14 | 顾孙平 | Embedded iron member and anchor bar connecting structure |
| CN104278668B (en) * | 2014-10-20 | 2016-04-13 | 顾孙平 | The syndeton of a kind of embedded iron parts and dowel |
| CN107989036A (en) * | 2017-12-29 | 2018-05-04 | 汤始建华建材（南通）有限公司 | A kind of new end-plate-free sleeve stake |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |