CN2795284Y - Top screw bottom lift expansion engaged body pile extension end plate and prefabricated member - Google Patents
Top screw bottom lift expansion engaged body pile extension end plate and prefabricated member Download PDFInfo
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- CN2795284Y CN2795284Y CN 200520019577 CN200520019577U CN2795284Y CN 2795284 Y CN2795284 Y CN 2795284Y CN 200520019577 CN200520019577 CN 200520019577 CN 200520019577 U CN200520019577 U CN 200520019577U CN 2795284 Y CN2795284 Y CN 2795284Y
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Abstract
The utility model relates to a pipe pile buckle, a precast member composed by adopting a precast member interface and the connecting structure between a precast member and a precast member belonging to the precast member buckle and the precast member manufacture field. A top screw bottom lift expansion engaging body pile splicing end plate includes an end plate. Two or a plurality of rising drawing cap nuts are peripherally equipped on the end plate. The screw section in the expansion engaging screw is screwed and jointed in the rising drawing cap nut. Two or a plurality of lift draw cap nuts are peripherally equipped on the end plate. When end-to-end jointing, the expansion tooth section of the expansion engaging screw is expanded and engaged in the expansion engaging chamber of the lift draw cap nut under the function of the expansion pin. The top screw bottom lift expansion engaging body pile splicing end plate forms a precast member. Both ends of the precast member are respectively equipped with end plates with a rising drawing cap nut and a lift draw cap nut. Headings at both ends of a plurality of longitudinal bars in the precast member are respectively clamped on the clamping table of the bar heading in the rising drawing cap nut and the lift draw cap nut. The expansion engaging screw is used for jointing two precast members.
Description
Technical field:
The utility model relates to a kind of pile tube and connects button, precast plate and connect that button, bridge pier connect button, bridge connects button and electric pole interface and prefabricated component thereof, and adopt pile tube to connect button, precast plate to connect button, bridge pier and connect button, bridge and connect syndeton between being connected between being connected between being connected between pile tube that button and electric pole interface constitutes and pile tube and pile tube, precast plate and precast plate, bridge pier and bridge pier, electric pole preform rod and preform rod, the genus prefabricated component connects to be detained and prefabricated component manufacturing field.
Background technology:
Notice of authorization CN2495685Y, title " concrete tubular pile snap joint ", this joint comprises respectively with last, stake is plugged into and is held two affixed end plates, connecting pin, offer screwed hole in the end plate of last stake, connecting pin one end is threaded and can cooperates with the screwed hole of last stake end plate, the other end is square, and both sides have to stagger closes tooth, the end plate below of following stake is embedded with connector box, between two ends of connector box and two pin plates compression spring is housed, the square hole that one end of connecting pin band engaging tooth can pass down on the end plate of stake inserts between two pin plates, on it engaging tooth can be meshing with each other with the tooth of pin plate one side.Its weak point: the one, because following end plate only depends on 6 connector boxs, last stake only depends on volume less than the termination of connector box and the concrete setting in the pile tube together, and can't be connected as a single entity with the longitudinal reinforcement in the pile tube, can't constitute overall structure with the cage of reinforcement in the pile tube, it connects suitable intensity initiative and reliability can't guarantee at all, particularly when connector box and termination are subjected to external impacts, its connector box produces with concrete inevitably with the termination and separates, can't guarantee to go up stake and following reliable the butt joint, this is present present technique field one of insurmountable technical barrier so far; The 2nd, the compression spring in the connector box in the pile crown plate up and down, after pile tube in depth touches underground water down, produce corrosion inevitably, As time goes on the elasticity of its compression spring will progressively disappear, the pile extension fracture takes place at last inevitably, seriously have influence on the safety factor and the safety of the building of building, this not only exists in the docking of the pile tube of this structure and pile tube, and in the docking of the pile tube of other tube pile structure and pile tube, seriously exist, be the present technique field so far still unsolved technical barrier two; The 3rd, when prefabricated, can't solve up and down pile crown plate and concrete and between the crackle that produced and the spillage phenomenon that caused of pile crown plate up and down, therefore reduced concrete intensity, easily pile breaking phenomenon taken place, this be the present technique field so far still unsolved technical barrier three; The 4th, the skirtboard that had of pile crown plate up and down, the circumferential reinforcement that pilespacing head plate place preceding 5~6 is enclosed can't be put and be welded on the longitudinal reinforcement, therefore the length that the reinforcing bar longitudinal extension is produced when haling longitudinal reinforcement, make before the pile crown plate place on several meters to tens of meters the longitudinal reinforcement acyclic at all to reinforcing bar, prefabricated pile tube, fragmentation takes place in its one inevitably, gently then influence piling quality, heavy then cause piling failure, this is that present present technique field is wanted to solve, but so far four of still unsolved technical barrier; The 5th, can't solve some longitudinal reinforcement longitudinal extension uniformity in the pile tube, can't realize that standardization hales the purpose of reinforcing bar, the bad aftereffect that is produced is: can't guarantee pile tube intensity, can't guarantee the uniformity of some pile tube inherent qualities, be that present present technique field is wanted to solve, but so far five of still unsolved technical barrier; The 6th, cost expense height, the fabricating cost of every block of pile crown plate up to 300 yuan about, increased construction costs widely.
Summary of the invention:
Purpose of design: avoid the weak point in the background technology, designing a kind of one is that longitudinal reinforcement in the pipe pile reinforcing bar cage only passes end plate and draws nut and top to draw the nut clamping with rising respectively, and the fracture of fundamentally avoiding pile tube is with broken; The 2nd, the pile tube butt joint is simple, quick, reliable; The 3rd, guaranteeing to reduce the cost of production of pile tube (bridge prefabrication plate, electric pole precast body etc.) widely under the pile tube butt joint reliable quality prerequisite.
Design scheme: in order to realize purpose of design of the present utility model, the utility model is to be 200410091063.9 at all application numbers of the applicant, on the basis that title " goes up apical grafting stake button and prefabricated component under the spiral shell ", to adopt the expansion theory of engagement to force the expansion engaging screw moment between the pile tube that needs pile extension to form the engagement butt joint of expanding.On structure design: 1, the design of drawing nut of rising is one of feature of the present utility model, and its major function is: the one, and rise and draw the screw thread in the nut and the screw of expansion engaging screw body section to spin, work to hale reinforcing bar, pile extension; The 2nd, have a reinforced hole at the bottom of the cap of nut, the periphery of reinforced hole is reinforcing bar heading Ka Tai, this reinforcing bar heading card platform can be stuck in the reinforcing bar heading that will connect firmly to rise and draw in the nut.2, to draw the design of nut be two of feature of the present utility model on the top, and its major function is: the one, hale the longitudinal reinforcement in the pile tube; The 2nd, be prefabricated component with prefabricated component between (being connected between being connected between pile tube and pile tube, between precast plate and precast plate, bridge pier and bridge pier, electric pole preform rod with between preform rod) when docking, the expansion of expansion meshing-body is engaged on the top and draws in the engagement chamber of expanding in the nut and with the pawl formation expansion of its chamber wall and combine in the expansion engaging screw; The 3rd, the top is provided with a reinforced hole at the bottom of drawing the cap of nut, and the periphery of reinforced hole is reinforcing bar heading Ka Tai, and this reinforcing bar heading card platform can be stuck in the reinforcing bar heading that will connect firmly to rise and draw in the nut.Haling longitudinal reinforcement is meant: the top draw nut with rise draw nut to be through the longitudinal reinforcement of pile tube after, heading is upset at the two ends of its longitudinal reinforcement, its heading is connected to the top firmly and draws nut and rise on the reinforcing bar heading Ka Tai that draws nut, rising this moment draws an end of nut to fix, the top is haled screw and can be realized haling the purpose that longitudinal reinforcement extends after drawing the screw thread in the nut and hale screw and spinning; The 4th, the design that has tapering expansion engagement chamber in the nut is drawn on the top, can satisfy the expansion engagement needs of the expander of expansion engaging screw, and the expansion meshing-body in the expansion engaging screw is closed with the engaging tooth formation hook drawknot that meshes in the chamber that expands after expansion firmly.3, the design of expansion engaging screw is three of a feature of the present utility model, its major function is: the one, and the expander in the expansion engaging screw can draw the expansion in the nut to mesh expansion instantaneous expansion distortion in the chamber after the insertion by force that is subjected to bloated pin on the top, and the expander after the dilatancy can be fixed in the expansion engagement chamber by hook lock firmly; The 2nd, the screw section in the expansion engaging screw with rise draw nut to spin after, can moment draw nut to realize that plug-in type expands to mesh and dock with the top, thus can be with docking between pile tube and pile tube with expansion ways of connecting permanent finishing of moment.The bloated pin of expansion engaging screw expander end be expander be able to that instantaneous expansion struts basic, it is similar to, and taper-----point is gone up thick down, after inserting expander, expander can be strutted, produces permanent deformation, permanent locking in the expansion engagement chamber of nut is drawn on the top along its guiding wire casing moment of expanding.4, rise that to draw nut and top to draw nut be four of feature of the present utility model with the design of end plate welding connection structure respectively, its major function is: the one, guarantee to rise draw nut and top draw nut distribute accurately, be convenient between pile tube and pile tube fast, accurately dock; The 2nd, can be effectively draw power that nut and top draw nut to be delivered to the end face of pile tube equably by its end plate with acting on to rise, avoid impact force to concentrate, easily cause the deficiency of pile tube breakage.
Technical scheme 1: upper-screw-lower-top expansion meshing body pile extension end plate, it comprises end plate (19) and (20), 2 or a plurality of rising draw nut (3) to be distributed on the end plate (19), screw section in the expansion engaging screw (4) is screwed in to rise and draws in the nut (3), 2 or a plurality of top draw nut (5) circle distribution on end plate (20), during butt joint, the expansion tooth section of expansion engaging screw (4) expands to be engaged under the effect of the pin (6) that expands and pushes up in the expansion engagement chamber of drawing in the nut (5).
Technical scheme 2: the prefabricated component that constitutes by upper-screw-lower-top expansion meshing body pile extension end plate, the prefabricated component two ends are equipped with respectively that having rises draws nut and top to draw the end plate of nut, the heading (2) at some longitudinal reinforcements (18) two ends is stuck in to rise and draws nut (3) and top to draw reinforcing bar heading Ka Tai (8 in the nut (5) in the prefabricated component (17), 11) on, expansion engaging screw (4) is used for docking between prefabricated component and prefabricated component.
Technical scheme 3: prefabricated component that constitutes by upper-screw-lower-top expansion meshing body pile extension end plate and the docking structure between prefabricated component, the end of two prefabricated components that dock is equipped with respectively and has several and rise and draw nut and top to draw the end plate of nut, the screw section of expansion engaging screw is screwed in to rise and draws in the screw thread of nut, the expansion tooth section of expansion engaging screw expands under the pin effect of expanding and is engaged on the top and draws in the expansion engagement chamber of nut, finishes docking between prefabricated component and prefabricated component.
Technical scheme 4: the preparation method of making prefabricated component by upper-screw-lower-top expansion meshing body pile extension end plate, the two ends heading of some longitudinal reinforcements is stuck in that the heading Ka Tai that draws nut of rising goes up and the top draws the heading Ka Tai of nut to go up and put it in the shaping mould in the reinforcing cage, placing of concrete, matched moulds, haling rising of prefabricated component die cavity one end simultaneously draws expansion nut to the power that sets, after forcing some reinforcing bars to extend to the length that sets synchronously, centrifugal casting or vibration foundry goods, get promptly that having rises and draw the prefabricated component of expansion nut structure, expansion engaging screw and be used for docking between prefabricated component and prefabricated component.
The utility model is compared with background technology, the one, rise draw nut and top draw nut respectively with the design of end plate welding connection structure, not only guaranteeing rises draws nut and top to draw nut to distribute accurately, be convenient between pile tube and pile tube fast, accurately butt joint, and can draw nut and top to draw the power of nut to be delivered to the end face of pile tube equably by its end plate with acting on to rise effectively, avoided impact force to concentrate the deficiency of the pile tube breakage that is caused, the safety factor and the safety of piling quality have been guaranteed, fundamentally guaranteed building, particularly the reliability of high-rise building foundation quality; The 2nd, avoided the spillage phenomenon, guaranteed pile tube globality and intensity, eliminated the pile breaking phenomenon that background technology exists; The 3rd, can make circumferential reinforcement spot weld the longitudinal reinforcement two ends, do not exist to leak to weld and punctuate, when haling longitudinal reinforcement, steel hoop on the longitudinal reinforcement can extend with the extension of longitudinal reinforcement synchronously, the uniformity and the globality of pipe pile reinforcing bar skeleton quality have been guaranteed, fundamentally solved piling that background technology exists when stressed, its pile tube fragmentation, fracture defective; The 4th, expansion meshing-body drawing in the nut pawl of the engagement chamber wall that expands to form expansion hook drawknot with the top to close, guaranteed the reliable connection between pile tube and pile tube in the expansion engaging screw; The 6th, solve the problem that some longitudinal reinforcements in the pile tube can't the standardization longitudinal extension, realized the uniformity of pile tube intensity, pile tube inherent quality; The 5th, reduced the cost of production of pile tube widely, can produce unexpected economic benefit and social benefit every year for saving RMB more than 3,000,000,000 yuan; The 6th, start made between pile tube and pile tube, the novel docking structure between precast plate and precast plate, between bridge pier and bridge pier, between electric pole preform rod and preform rod.
Description of drawings:
Fig. 1 is the structural representation of upper-screw-lower-top expansion meshing body pile extension end plate.
Fig. 2 rises to draw the structural representation of nut.
Fig. 3 is the structural representation that nut is drawn on the top.
Fig. 4 expander end construction schematic diagram in the engaging screw that expands.
Fig. 5 is an expansion engaging screw master TV structure schematic diagram.
Fig. 6 is the structural representation that expands and sell.
Fig. 7 is the structural representation of pile tube.
Fig. 8 is the pile tube of upper-screw-lower-top expansion meshing body pile extension end plate formation and the pile extension structural representation between pile tube or bridge pier and bridge pier or electric pole and electric pole.
Fig. 9 is the precast plate of upper-screw-lower-top expansion meshing body pile extension end plate formation and the pile extension structural representation between precast plate.
Figure 10 is the partial structurtes schematic diagram of pile tube moulding.
The specific embodiment:
Embodiment 1: with reference to accompanying drawing 1~6.Upper-screw-lower-top expansion meshing body pile extension end plate, it comprises end plate 19 and 20,2 or a plurality of rising draw nut 3 circle distribution on end plate 19, screw section 4 in the expansion engaging screw 4 is screwed in to rise and draws in the nut 3,2 or a plurality of top draw nut 5 circle distribution on end plate 20, during butt joint, the expansion tooth section of expansion engaging screw 4 expands to be engaged under the effect of the pin 6 that expands and pushes up in the expansion engagement chamber of drawing in the nut 5, sees accompanying drawing 1.Rise and draw nut 3 to adopt metal (as steel, stainless steel, alloy steel etc.) or nonmetals (as plastics, synthetic plastic, pottery etc.) by existing casting or injection moulding or ceramic sintering or machining technique making, the center at the bottom of the cap that draws nut that rises has reinforced hole 7, the periphery of reinforced hole 7 is a reinforcing bar heading card platform 8, rise and draw the screw thread in the nut 3 to hale reinforcing bar, pile extension effect, see accompanying drawing 2 for haling the pile extension screw thread, plaing; The top draws nut 5 to adopt metal (as steel, stainless steel, alloy steel etc.) or nonmetals (as plastics, synthetic plastic, pottery etc.) by existing casting or injection moulding or ceramic sintering or machining technique making, the top draws the expansion engagement chamber 10 in the nut 5 to have tapering and the wall that meshes chamber 10 that expands is the pawl structure, and it is big down little that the engagement cavity that expands is; The top draws the screw thread 9 on nut 5 tops for haling screw thread, rises and hales action of steel bars.Draw the expansion in the nut to mesh in the chamber 10 for the ease of the 16 moments insertion of the expander in the expansion engaging screw 4 top, draw the entrance point of haling screw thread of nut that one circle enlarging is arranged on the top, see accompanying drawing 3.Expansion engaging screw 4 adopts metal (as steel, stainless steel, alloy steel etc.) or nonmetals (as plastics, synthetic plastic etc.) by existing casting or injection moulding or machining technique making, expansion engaging screw 4 is by the pin 6 that expands, expansion meshing-body 16 and screw 15 constitute, expansion meshing-body 16 and screw 15 are overall structure, the wall of expansion engaging screw is suitable toothing and draws the pawl formation expansion of the engagement chamber 10 chamber walls that expand in the nut 5 to combine with the top, the head of swollen pin 6 is inserted in the expansion meshing-body upper end centre pilot passage 13, vertically have 1 or 2 or many guiding wire casing 14 that expands on the wall of guide channel, draw the expansion in the nut to mesh in the chamber 10 for the ease of the 16 moments insertion of the expander in the expansion engaging screw 4 top, the arm of angle that connects of the end of the expander of expansion engaging screw 4 is outwelled a circle, see attached Figure 4 and 5.
Embodiment 2: with reference to accompanying drawing 7.On the basis of embodiment 1, the prefabricated component that constitutes by upper-screw-lower-top expansion meshing body pile extension end plate, the prefabricated component two ends are equipped with respectively that having rises draws nut and top to draw the end plate of nut, the heading 2 at some longitudinal reinforcement 18 two ends is stuck in to rise and draws nut 3 and top to draw on the reinforcing bar heading card platform 8 and 11 in the nut 5 in the prefabricated component 17, and expansion engaging screw 4 is used for docking between prefabricated component and prefabricated component.The screw section of expansion engaging screw 4 is screwed in to rise draws that (this expansion engaging screw 4 is when pile tube docks with pile tube, and the screw section of its expansion engaging screw is screwed in to rise and carries in the nut 3 in the nut 3; When pile tube did not dock with pile tube, its expansion engaging screw 4 drew nut 3 to separate with rising, separately keeping).
Embodiment 3: with reference to accompanying drawing 8.On the basis of embodiment 1 and 2, prefabricated component that constitutes by upper-screw-lower-top expansion meshing body pile extension end plate and the docking structure between prefabricated component, the end parts of two prefabricated components that dock is equipped with and has several and rise and draw nut and top to draw the end plate of nut, the screw section of expansion engaging screw is screwed in to rise and draws in the screw thread of nut, the expansion tooth section of expansion engaging screw expands under the pin effect of expanding and is engaged on the top and draws in the expansion engagement chamber of nut, finishes docking between prefabricated component and prefabricated component.
Embodiment 4: with reference to accompanying drawing 9.On the basis of embodiment 1 and 2, precast plate that constitutes by upper-screw-lower-top expansion meshing body pile extension end plate and the docking structure between precast plate, the end parts of two precast plates (comprising bridge prefabrication plate, precast floor slab etc.) that dock is equipped with and has several and rise and draw nut and top to draw the end plate of nut, the screw section of expansion engaging screw is screwed in to rise and draws in the screw thread of nut, the expansion tooth section of expansion engaging screw expands under the pin effect of expanding and is engaged on the top and draws in the expansion engagement chamber of nut, finishes docking between prefabricated component and prefabricated component.
Embodiment 5: with reference to accompanying drawing 10.Make the preparation method of prefabricated component by upper-screw-lower-top expansion meshing body pile extension end plate, the two ends heading of some longitudinal reinforcements is stuck in that the heading Ka Tai that draws nut of rising goes up and the top draws the heading Ka Tai of nut to go up and put it in the shaping mould in the reinforcing cage, placing of concrete, matched moulds, hale simultaneously rising of prefabricated component die cavity one end draw expansion nut to the power that sets, force some reinforcing bars to extend to the length that sets synchronously after, centrifugal casting or vibration foundry goods, get promptly that having rises and draw the prefabricated component of expansion nut structure, expansion engaging screw and be used for docking between prefabricated component and prefabricated component.The equal in length of some longitudinal reinforcements; Circumferential reinforcement or transverse reinforcement weld or are bundled on the longitudinal reinforcement; Rise and draw nut to draw the quantity of nut to equate with the top.
What need understand is: though the foregoing description is to the utility model detailed explanation of contrasting; but these embodiment are just illustrative to the utility model; rather than to restriction of the present utility model; any innovation and creation that do not exceed in the utility model connotation all fall in the protection domain of the present utility model.
Claims (7)
1, a kind of upper-screw-lower-top expansion meshing body pile extension end plate, it comprises end plate (19) and (20), it is characterized in that: 2 or a plurality of rising draw nut (3) to be distributed on the end plate (19), screw section in the expansion engaging screw (4) is screwed in to rise and draws in the nut (3), 2 or a plurality of top draw nut (5) circle distribution on end plate (20), during butt joint, the expansion tooth section of expansion engaging screw (4) expands to be engaged under the effect of the pin (6) that expands and pushes up in the expansion engagement chamber of drawing in the nut (5).
2, upper-screw-lower-top expansion meshing body pile extension end plate according to claim 1, it is characterized in that: the center at the bottom of the cap that draws nut (3) that rises has reinforced hole (7), and the periphery of reinforced hole (7) is reinforcing bar heading Ka Tai (8); The top draws nut (5) top to be the engagement chamber (10) of expanding for haling screw thread (9), bottom, and the center of pushing up at the bottom of the cap that draws nut (5) has reinforced hole (12), and the periphery of reinforced hole is reinforcing bar heading Ka Tai (11).
3, upper-screw-lower-top expansion meshing body pile extension end plate according to claim 2 is characterized in that: the top draws the expansion engagement chamber (10) in the nut (5) to have tapering and the wall that meshes chamber (10) that expands is the pawl structure, and the engagement chamber (10) of expanding is big down little; The top draws the screw thread (9) on nut (5) top for haling screw thread.
4, upper-screw-lower-top expansion meshing body pile extension end plate according to claim 1, it is characterized in that: expansion engaging screw (4) is made of expand pin (6), expansion tooth section (16) and screw section (15), expansion tooth section (16) and screw section (15) are overall structure, the expansion tooth Duan Chengshun toothing of expansion engaging screw and the pawl engagement of drawing engagement chamber, chamber (10) wall that expands in the nut (5) with the top, the head of swollen pin (6) is inserted in the expansion meshing-body upper end centre pilot passage (13), vertically has 1 or 2 or many guiding wire casing (14) that expands on the wall of guide channel.
5, upper-screw-lower-top expansion meshing body pile extension end plate according to claim 1 is characterized in that: rise and draw screw thread in the nut (3) for haling the pile extension screw thread, play reinforcing bar, the pile extension effect of haling.
6, a kind of prefabricated component that constitutes by upper-screw-lower-top expansion meshing body pile extension end plate, it is characterized in that: the prefabricated component two ends are equipped with respectively that having rises draws nut and top to draw the end plate of nut, the heading (2) at some longitudinal reinforcements (18) two ends is stuck in to rise and draws nut (3) and top to draw reinforcing bar heading Ka Tai (8 in the nut (5) in the prefabricated component (17), 11) on, expansion engaging screw (4) is used for docking between prefabricated component and prefabricated component.
7, a kind of prefabricated component that constitutes by upper-screw-lower-top expansion meshing body pile extension end plate and the docking structure between prefabricated component, it is characterized in that: the end parts of two prefabricated components that dock is equipped with and has several and rise and draw nut and top to draw the end plate of nut, the screw section of expansion engaging screw is screwed in to rise and draws in the screw thread of nut, the expansion tooth section of expansion engaging screw expands under the pin effect of expanding and is engaged on the top and draws in the expansion engagement chamber of nut, finishes docking between prefabricated component and prefabricated component.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN 200520019577 CN2795284Y (en) | 2005-05-17 | 2005-05-17 | Top screw bottom lift expansion engaged body pile extension end plate and prefabricated member |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN 200520019577 CN2795284Y (en) | 2005-05-17 | 2005-05-17 | Top screw bottom lift expansion engaged body pile extension end plate and prefabricated member |
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CN2795284Y true CN2795284Y (en) | 2006-07-12 |
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CN 200520019577 Expired - Fee Related CN2795284Y (en) | 2005-05-17 | 2005-05-17 | Top screw bottom lift expansion engaged body pile extension end plate and prefabricated member |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100445472C (en) * | 2005-05-17 | 2008-12-24 | 周兆弟 | Upper-screw-lower-top expansion meshing body pile-connecting end plate and prefab |
CN105179397A (en) * | 2015-10-09 | 2015-12-23 | 周兆弟 | Clamping table type connecting piece |
CN106812137A (en) * | 2017-03-06 | 2017-06-09 | 广州市第三建筑工程有限公司 | A kind of quick pile extension device, prefabricated pile and preparation method thereof and pile extension method |
-
2005
- 2005-05-17 CN CN 200520019577 patent/CN2795284Y/en not_active Expired - Fee Related
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100445472C (en) * | 2005-05-17 | 2008-12-24 | 周兆弟 | Upper-screw-lower-top expansion meshing body pile-connecting end plate and prefab |
CN105179397A (en) * | 2015-10-09 | 2015-12-23 | 周兆弟 | Clamping table type connecting piece |
CN106812137A (en) * | 2017-03-06 | 2017-06-09 | 广州市第三建筑工程有限公司 | A kind of quick pile extension device, prefabricated pile and preparation method thereof and pile extension method |
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