CN209837004U - Precast concrete pile connection structure - Google Patents

Abstract

The utility model discloses a precast concrete pile connecting structure, which comprises an end plate I, an end plate II, a positioning inserted bar and a clamping and fixing component, the locating inserted bar is arranged on the end plate I, the clamping component is arranged on the end plate II and comprises a limiting clamping sleeve, a limiting wedge clamp and a holding spring, the limiting clamping sleeve is provided with a clamping sleeve body and a guide supporting part, a guide sliding groove is arranged on the guide supporting part, a guide sliding surface is arranged on one side of the clamping sleeve body close to the guide sliding groove, the limiting wedge clamp is arranged in the guide sliding groove, the holding spring is sleeved on the outer side of the guide supporting part, the locating inserted bar can be inserted into the limiting clamping sleeve, and with spacing wedge card and location inserted bar joint under the resilience force effect of holding the power spring, realize the high-speed joint of concrete pile, the utility model discloses a connection structure has simple structure, and the assembly is swift, convenient, resistance to plucking, advantage that the shear strength performance is excellent.

Description

Precast concrete pile connection structure

Technical Field

The utility model relates to a precast concrete pile connection structure.

Background

The tubular pile has incomparable advantages as other pile types when used as the uplift pile, particularly the pile body can not crack in the effective pre-stress range, the protection to the prestressed reinforcement is better, and the uplift bearing capacity of the pile body can be better exerted. The tubular pile does not need to consider increasing reinforcing bars to enhance the tensile capacity of the pile body due to strict crack control, so that the economical efficiency of the tubular pile as a uplift pile is increasingly remarkable.

The general engineering piles (precast piles) are multi-section piles, and uplift piles are no exception and generally need to be spliced. Therefore, the strength of the tubular pile connecting member is also an important control index of the pulling-resistant bearing capacity of the tubular pile. The intensity checking calculation of the connecting member mainly comprises the welding seam intensity checking calculation, the end plate orifice shear strength checking calculation and the end plate pier head tensile strength checking calculation.

End plate weld strength: unlike pressure bearing piles, the weld is critical to the bearing capacity of uplift piles. According to the corresponding requirements of the tubular pile atlas, the quality of the welding seam can be ensured. The strength of the end plate weld is greater than the structural strength of the pile body. However, in the actual construction process, the quality of the welding seam and the pile pressing to the underground after the welding seam is cooled are not achieved, the problems of welding seam cracking, welding seam corrosion resistance and the like caused by the expansion and contraction of heat and cold of the underground water are solved, and the probability of quality accidents at the welding seam is high.

End plate orifice shear strength: in a static load test of a tubular pile as an anchor pile, the joint of a tubular pile end plate and a pile body prestressed tendon is also an inventory weakness, and the shearing strength value through checking calculation is far less than the strength of the pile body.

Tensile strength of the end plate pier head: because the tubular pile is prestressed by a pretensioning method, the integral connection strength of the prestressed tendons of the single-section pile and the end plate is tested in the tubular pile manufacturing process. Theoretically, as long as the pipe pile is prestressed and tensioned to the position during the manufacturing process, the integral connection strength of the member is also quite guaranteed.

With the rapid development of the Chinese construction industry, the requirements on the anti-pulling performance of the prefabricated pile joint are higher and higher, and the using amount of the anti-pulling prefabricated pile joint in coastal cities accounts for more than 30 percent of the total pile using amount.

The traditional butt joint mode of the concrete uplift pile is a hoop form and a mechanical meshing form, the hoop form is that two concrete piles are hooped together by three steel plates outside two prefabricated concrete pile end plates which are connected with each other, and the concrete pile connecting structure of the form needs a thicker end plate, so that the problems of high cost, complex production and installation processes, inconvenience in installation and the like are caused.

The mechanically engaged concrete pile connecting structure is shown in fig. 15, 16a and 16b, and comprises a first end plate 77 and a second end plate 78, wherein a first accommodating box 70 is welded on the end surface of the first end plate 77 contacting with concrete, a plurality of springs 72 and engaging members 73 are arranged in the first accommodating box 70, and latch teeth are arranged on the engaging members. The second end plate 78 is welded with the second accommodating box 71 on the end face in contact with concrete, a fixing piece 76 is arranged in the second accommodating box 71, a connecting insertion rod fixing hole 780 is formed in the second end plate 76, a connecting insertion rod 75 is installed in the connecting insertion rod fixing hole 780, the connecting insertion rod 75 is in threaded connection with the second end plate 78 and the fixing piece 76, a latch is arranged on a plug of the connecting insertion rod 75, the plug of the connecting insertion rod 75 can penetrate through a plug through hole 770 in the first end plate 77 to enter the first accommodating box 70, under the pushing of a spring, the latch on the meshing piece is meshed with the latch on the connecting insertion rod, and the connection of two concrete piles is achieved. This kind of concrete pile connection structure has the following problem: 1. in the production process of the concrete pile, the meshing piece, the spring and the fixing piece are required to be respectively arranged in different accommodating boxes, and the accommodating boxes are welded on the end plate, so that the production process is complicated, 2, the accommodating boxes are welded on the end plate, so that a plurality of cavities are formed at the end part of the concrete pile, the sectional area of concrete at the end part of the concrete pile is reduced, and the compression resistance of the concrete pile is reduced; 3. the connecting structure is mutually clamped through the teeth, so that the two concrete piles are connected, however, the tooth meshing can inevitably generate a gap between the tooth assembly and the connecting inserted rod, so that a gap is generated between the concrete piles, and the anti-pulling performance is reduced; 4. the main rib fixing holes and the connecting inserted bar fixing holes (plug through holes) need to be processed on the end plate, and the connecting inserted bar fixing holes (plug through holes) and the main rib fixing holes are arranged on the end plate at intervals, so that the strength of the end plate is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the proposition of above problem, and research and design precast concrete stake resistance to plucking connection structure has simple structure, the lightweight, convenient assembling, swift, and resistance to plucking, advantage that shear behavior is excellent.

The utility model discloses a technical means as follows:

a precast concrete pile connecting structure comprises an end plate I, an end plate II, a positioning insertion rod and a clamping and fixing assembly, wherein the positioning insertion rod is installed on the end plate I, the clamping and fixing assembly is installed on the end plate II, and the clamping and fixing assembly comprises a limiting clamping sleeve, a limiting wedge clamp and a holding spring; the positioning inserted bar comprises a fixed seat and a plug arranged on the fixed seat, a positioning inserted bar mounting hole is arranged on the end plate I, the fixed seat is in threaded connection with the positioning inserted bar mounting hole, an accommodating space for inserting the plug is arranged inside the limiting cutting sleeve, the limiting cutting sleeve comprises a limiting cutting sleeve body and a guiding support part arranged at one end of the limiting cutting sleeve body, a limiting cutting sleeve mounting hole is arranged on the end plate II, the outer wall of the limiting cutting sleeve body is in threaded connection with the limiting cutting sleeve mounting hole, more than one guiding sliding groove is arranged on the guiding support part, the limiting wedge is arranged in the guiding sliding groove, a guiding sliding surface is arranged on the inner side of one end of the limiting cutting sleeve body, which is in contact with the limiting wedge, the limiting wedge can slide in the guiding sliding groove along the guiding sliding surface, and the plug clamping surface is arranged at the contact position of, be equipped with on the spacing wedge card with the wedge card glide plane of direction glide plane contact and with the wedge card joint face of plug joint face contact, hold power spring housing in the outside of direction supporting part, be equipped with the spring limit structure who prevents to hold power spring and drop on the outer wall of the one end of keeping away from the spacing wedge card of direction supporting part, it lies in between spacing wedge card and the spring limit structure to hold power spring on axial direction, the plug can insert accommodation space and through holding power spring rebound with spacing wedge card push into between direction glide plane and the plug joint face and then realize being connected of location inserted bar and spacing cutting ferrule.

Further, be equipped with the inserted bar butt face between fixing base and the plug, be equipped with on the internal diameter of the male one end of location inserted bar of spacing cutting ferrule and insert spacing face, when the plug inserts spacing cutting ferrule, inserted bar butt face with insert spacing face butt.

Furthermore, the number of the guide sliding chutes is 3 or 4, the sections of the guide sliding chutes are fan-shaped, and the central angle corresponding to the fan-shaped sections of the guide sliding chutes is 30-90 degrees.

Furthermore, the spring limiting structure is a limiting bulge integrated with the guide supporting part or a clamp spring structure arranged at one end of the guide supporting part.

Furthermore, at least one of the guide sliding surface, the wedge clamping and connecting surface, the wedge sliding surface and the plug clamping and connecting surface is provided with an anti-skidding structure.

Further, the anti-slip structure is a latch or a taper thread.

Furthermore, one end of the holding spring, which is close to the limiting wedge clamp, is also provided with an inner concave part which is bent to the central line of the holding spring, and when the holding spring is sleeved outside the guide supporting part, the inner concave part is arranged in the guide sliding groove and is abutted against one end, which is far away from the guide sliding surface, of the limiting wedge clamp.

Furthermore, a clamping structure is further arranged at one end, inserted by the positioning insertion rod, of the limiting clamping sleeve.

Furthermore, a first apron board is further arranged on the end plate I, and a second apron board is arranged on the end plate II; and a plurality of main rib fixing holes are formed in the end plate I and the end plate II, and circular bulges are arranged at positions corresponding to the main rib fixing holes on the end plate I and the end plate II, which are in contact with concrete, on one end face.

Furthermore, epoxy resin structural adhesive is coated between the end plate I and the end plate II.

Compared with the prior art, precast concrete pile connection structure have following beneficial effect: the utility model discloses a connecting structure which has simple structure, few parts and convenient assembly; the main reinforcements of the two or more connected piles are on the same axis, and the orifices of the end plates are filled with epoxy resin structural adhesive and are provided with raised reinforcing structures opposite to the counter bores of the end plate, so that the pulling resistance of the joints is improved, and the integral uniformity of the pile body in resisting external force is effectively ensured when the pile body is subjected to lateral pressure and/or shearing force.

Drawings

Fig. 1 is a structural view of a precast concrete pile connection structure disclosed in the present invention;

FIG. 2 is an enlarged schematic view at A in FIG. 1;

FIG. 3a is a structural view of the header plate I;

FIG. 3B is a cross-sectional view taken at B-B of FIG. 3a, showing only the upper half of the structure in an enlarged scale;

FIG. 4 is a block diagram of the header plate II;

FIG. 5 is a view showing the construction of the plunger;

fig. 6a is a structural diagram of a limiting ferrule;

FIG. 6b is a left side view of FIG. 6 a;

FIG. 6c is a right side view of FIG. 6 a;

FIG. 7a is a block diagram of a spacing wedge card;

FIG. 7b is a cross-sectional view taken at D-D of FIG. 7 a;

FIG. 8a is a structural view of a holding spring;

FIG. 8b is a left side view of FIG. 8 a;

FIG. 8c is a structural view of the holding spring sleeved on the limiting ferrule;

fig. 9 is a structural diagram of a precast concrete pile connection structure having latches on both the plug engagement surface and the wedge engagement surface of the present invention, in which only the positioning insertion rod and the limiting wedge are shown;

fig. 10a is a precast concrete pile connection structure having a latch structure on a guiding sliding surface according to the present invention, in which only a positioning inserted rod, a limiting wedge clip, a limiting clip sleeve and a holding spring are shown;

FIG. 10b is an enlarged view of the contact position between the limiting wedge card and the limiting cutting sleeve in FIG. 10 a;

fig. 11a is a precast concrete pile connection structure with a latch structure on a wedge slip surface of the present invention, in which only a positioning inserted rod, a limiting wedge, a limiting cutting sleeve and a holding spring are shown;

FIG. 11b is an enlarged view of the contact position between the limiting wedge card and the limiting cutting sleeve in FIG. 11 a;

fig. 12a is a structural view of a concrete pile with a connection structure according to the present invention during a manufacturing process, wherein steel plates are fixed to both ends of an end plate, and the steel plates are connected to the end plate by bolts;

fig. 12b is a structural view of the precast concrete pile obtained in fig. 12 a;

FIG. 12c is an enlarged view at B in FIG. 12B;

FIG. 12d is an enlarged view at C of FIG. 12 b;

fig. 13 is a connecting structure diagram of two concrete piles having the precast concrete pile connecting structure of the present invention;

FIG. 14a is a second block diagram of the header (header I) of the present disclosure;

FIG. 14b is a block diagram of the end of the header plate of FIG. 14a in contact with concrete;

FIG. 14c is a cross-sectional view taken at A-A of FIG. 14a, showing only the upper half thereof, and shown enlarged;

fig. 15 is a structural view of a prior art mechanical ratcheting concrete pile connection structure;

FIG. 16a is a structural view of a first end plate of a mechanical ratcheting concrete pile connecting structure in the prior art

Fig. 16b is a block diagram of a second end plate of a prior art mechanical ratcheting concrete pile connection.

In the figure: 10. the end plates I and 11, the end plates II and 12, the positioning plunger mounting holes, 13, the limiting cutting sleeve mounting holes, 14, the main rib fixing holes, 141, a circular bulge, 15, a first apron plate, 16, a second apron plate, 17, a welding groove, 2, a designated plunger, 20, a fixed seat, 21, a plug, 22, a plug clamping surface, 23, a plunger abutting surface, 3, a limiting cutting sleeve, 30, a containing space, 31, a limiting cutting sleeve body, 32, a guiding supporting part, 33, a guiding sliding groove, 34, a guiding sliding surface, 36, a clamping groove, 37, a clamping spring, 38, a groove, 39, an insertion limiting surface, 4, a limiting wedge clamp, 40, a wedge sliding surface, 41, a wedge clamping surface, 42, a wedge clamp outer side surface, 43, a wedge clamp guiding surface, 44, an end surface of the wedge clamp, which is contacted with a clamping force spring, 5, a clamping force spring, 50, an inner concave part, 60, a first steel plate, 61, a second steel plate, 62 and a first bolt, 63. second bolt, 64, first accommodating groove, 65, second accommodating groove, 70, first accommodating box, 71, second accommodating box, 72, spring, 73, engaging piece, 75, connecting plunger, 76, fixing piece, 77, first end plate, 770, plug through hole, 78, second end plate, 780, connecting plunger fixing hole, 8, main rib.

Detailed Description

Example 1

As shown in fig. 1 and 2, the utility model discloses a precast concrete pile connection structure, including end board I10, end board II 11, location inserted bar 2 and the solid subassembly of card, location inserted bar 2 is installed on end board I10, the solid subassembly of card is installed on end board II 11, the solid subassembly of card includes spacing cutting ferrule 3, spacing wedge card 4 and holds power spring 5.

As shown in fig. 3a, a plurality of groups of positioning plunger mounting holes 12 and main rib fixing holes 14 are circumferentially and uniformly distributed on the end plate i 10, preferably, the positioning plunger mounting holes 12 and the main rib fixing holes 14 are communicated with each other to form a gourd-shaped structure, as shown in fig. 4, a plurality of groups of limiting cutting sleeve mounting holes 13 and main rib fixing holes 14 are circumferentially and uniformly distributed on the end plate ii 11, preferably, the limiting cutting sleeve mounting holes 13 and the main rib fixing holes 14 are communicated with each other to form a gourd-shaped structure, the main rib fixing holes 14 may be tapered holes, pier structures or threaded holes to be respectively used for connecting steel strands, PC steel bars and deformed steel bars, and the specific structure of the corresponding main rib fixing hole is disclosed in chinese patent [ 201610002479.1 ], and is well known to those skilled in the art, and will not be described herein again.

As shown in fig. 5, the positioning plunger 2 comprises a fixing seat 20 and a plug 21 arranged on the fixing seat 20, and the fixing seat 20 is in threaded connection with the positioning plunger mounting hole 12 of the end plate i 10.

As shown in fig. 6a, 6b and 6c, the limiting card sleeve 3 includes a limiting card sleeve body 31 and a guiding support portion 32 disposed at one end of the limiting card sleeve body 31, an external thread is disposed on an outer wall of the limiting card sleeve body 31, the limiting card sleeve body 31 is in threaded connection with the limiting card sleeve mounting hole 13, an accommodating space 30 for inserting the plug 21 is disposed inside the limiting card sleeve 3, the guiding support portion 32 has more than one guiding sliding groove 33, in this embodiment, the number of the guiding sliding grooves is 3, the limiting wedge 4 is disposed in the guiding sliding groove 33, a guiding sliding surface 34 is disposed inside one end of the limiting card sleeve body 31 contacting the limiting wedge 4, the limiting wedge 4 can slide along the guiding sliding surface 34 in the guiding sliding groove 33, a plug clamping surface 22 is disposed at a contact position of the plug 21 and the limiting wedge 4, as shown in fig. 7a and 7b, be equipped with the wedge card glide plane 40 that contacts with direction glide plane 34 and the wedge card joint face 41 that contacts with plug joint face 22 on the spacing wedge card 4, preferably, spacing wedge card 4 is still including being in the inboard wedge card guide surface 43 of plug insertion one end, wedge card glide plane 40, wedge card joint face 41, wedge card lateral surface 42, wedge card guide surface 43 and wedge card constitute the cross-section with the terminal surface 44 of holding power spring contact and be the pentagon structure, wedge card guide surface 43 can play the guide effect at plug insertion in-process, make things convenient for the quick of plug to insert. Hold power spring 5 cover in the outside of direction supporting part 32, be equipped with the spring limit structure that prevents to hold power spring and drop on the outer wall of the one end of keeping away from spacing wedge card 4 of direction supporting part 32, hold power spring 5 and lie in between spacing wedge card 4 and the spring limit structure on the axial direction, plug 21 can insert in accommodation space 30 and kick-back through holding power spring 5 and push into spacing wedge card 4 between direction glide plane 34 and the plug joint face 22 and then realize being connected of location inserted bar and spacing cutting ferrule, and then can realize the high-speed joint of precast concrete pile. It can be seen from figure 15 that current box-like concrete pile's of meshing connection structure, because connect inserted bar and tooth closes the piece and carry out mutual meshing through the latch and realize concrete pile's connection, consequently, connect the certain play that can have between the latch between inserted bar and the meshing piece, cause concrete pile's resistance to plucking to reduce, and the utility model discloses a concrete pile connection structure, after the plug inserts in the spacing cutting ferrule, the mutual engagement of three conical surface has been realized to direction glide plane, spacing wedge card and plug mutual contact, consequently, can not produce the clearance behind the block, has stronger resistance to plucking performance.

Further, as shown in fig. 2, 5 and 6a, a plunger abutting surface 22 is provided between the fixing base 20 and the plug 21, an insertion limiting surface 39 is provided on an inner diameter of an end of the limiting ferrule 3 where the positioning plunger is inserted, and when the plug 21 is inserted into the limiting ferrule 3, the plunger abutting surface 22 abuts against the insertion limiting surface 39. Due to the fact that the inserting rod abutting surface and the inserting limiting surface are arranged, the length of the plug inserted into the limiting clamping sleeve is determined, and the problems that due to the fact that the length of the positioning inserting rod inserted into the limiting clamping sleeve is too long, when the positioning inserting rod is pulled back, gaps are generated between the plug and the limiting wedge clamps, and the pulling resistance between concrete piles is reduced can be solved.

Further, the quantity of direction spout 33 is 3 or 4, the cross-section of direction spout 33 is fan-shaped, the central angle that the fan-shaped cross-section of direction spout 33 corresponds is 30-90 degrees, and is corresponding, and the quantity of spacing wedge card also is 3 or 4, and the cross-section of spacing wedge card is fan-shaped, and the central angle that the fan-shaped cross-section of spacing wedge card corresponds with the corresponding centre of a circle angle of the fan-shaped cross-section of direction spout (equal or slightly less), can make spacing cutting ferrule have better atress performance, improve the intensity of location cutting ferrule and spacing cutting ferrule, spacing wedge card and the atress performance between the plug, improve resistance to plucking, and increase of service life.

The utility model discloses a spring limit structure can be for the spacing arch integrative with the direction supporting part, and processing has protruding structure on the outer periphery wall of the tip of direction supporting part exactly also for prevent to hold the power spring and drop on the direction supporting part. Preferably, as shown in fig. 2 and fig. 6a, the spring limit structure is a clamp spring structure arranged at one end of the guide support part, specifically, a clamping groove 36 is processed on the outer wall of the end part of the guide support part 32, a clamp spring 37 is clamped in the clamping groove 36, when the spring limit structure is a limit projection integrated with the guide support part, the holding force spring is not convenient to be installed on the guide support part, when the spring limit structure is the clamp spring structure, the holding force spring can be firstly sleeved from the end part of the guide support part, then the clamp spring is clamped in the clamping groove so as to limit the holding force spring, and the structure facilitates the installation of the holding force spring.

Furthermore, at least one of the guide sliding surface 34, the wedge clamping surface 41, the wedge sliding surface 40 and the plug clamping surface 22 is provided with an anti-slip structure.

In the present embodiment, as shown in fig. 9, the plug clamping surface 22 and the wedge clamping surface 41 are both provided with anti-slip structures, which may be teeth or tapered threads, preferably tapered threads, as shown in the figure, when the plug clamping surface contacts with the wedge clamping surface, the teeth or tapered threads of the two clamping surfaces are engaged with each other, so as to increase the friction resistance between the fixed inserted rod and the limiting wedge, and increase the pulling resistance of the concrete pile.

As shown in fig. 10a and 10b, a second embodiment of the anti-slip structure is shown, in this embodiment, a latch structure is provided on the guide sliding surface 34, preferably, the height of the latch gradually increases along the inner side of the guide sliding surface, after the limit wedge enters the guide sliding surface and the plug clamping surface, the outer side surface of the wedge abuts against the latch on the guide sliding surface, so as to prevent the limit wedge from sliding relative to the guide sliding surface, and further improve the pull-out resistance of the concrete pile.

As shown in fig. 11a and 11b, a third embodiment of the anti-slip structure is shown, in this embodiment, a latch structure is disposed on the wedge sliding surface 40, and after the limiting wedge enters the guiding sliding surface and the plug clamping surface, an included angle between the guiding sliding surface and the inner wall of the limiting cutting ferrule body and a latch on the wedge sliding surface abut against each other, so that relative sliding between the limiting wedge and the guiding sliding surface can be prevented, and further, the pulling resistance of the concrete pile can be improved. The specific arrangement of the antiskid structure is not limited to the embodiment in 3, and can be arranged as required.

The holding force spring 5 can be a common cylindrical spring, preferably, as shown in fig. 8a, 8b and 8c, an inner concave portion 50 which is bent to the central line of the holding force spring 5 is further arranged at one end of the holding force spring 5 which is close to the limit wedge clamp 4, when the holding force spring 5 is sleeved outside the guide supporting portion 32, the inner concave portion 50 is arranged in the guide sliding groove 33 and is abutted to one end, far away from the guide sliding surface, of the limit wedge clamp 4, the inner concave portion 50 is arranged on the holding force spring, the contact area of the holding force spring and the limit wedge clamp is increased, the phenomena that the limit wedge clamp is blocked due to inclination in the movement process of the guide sliding groove are avoided, and a better resilience force is applied to the limit wedge clamp.

Further, the clamping structure is still established to the last inserted one end of location inserted bar of spacing cutting ferrule 3, and in this embodiment, the clamping structure is two recesses 38 that insert one end symmetry processing for the inserted bar of deciding at spacing cutting ferrule 3, can be when installing spacing cutting ferrule toward end board II, and the use tool card is gone into in two recesses and is used for rotating it, makes it twist in the spacing cutting ferrule mounting hole of end board II.

Further, as shown in fig. 1, 3a and 4, a first apron plate 15 is further disposed on the end plate i 10, a second apron plate 16 is disposed on the end plate ii 11, an epoxy structural adhesive is further coated between the end plate i and the end plate ii, specifically, when two sections of concrete piles are connected, one end of the concrete pile in the lower section having the end plate ii (i.e., the end having the fastening component mounted thereon) faces upward, one end of the concrete pile in the upper section having the end plate i (i.e., the end having the fastening rod mounted thereon) faces downward, before the fastening rod is inserted into the fastening component, epoxy structural adhesive is injected into the end face of the end plate ii of the concrete pile in the lower section, the end plate hole and the accommodating space of the limiting block, and then the plug of the concrete pile in the upper section is inserted into the limiting block to realize the connection of the two concrete piles, because the orifice of the end plate and the limiting clamping sleeve are injected with the epoxy resin structural adhesive, after the epoxy resin structural adhesive is solidified, the plug, the limiting wedge clamp and the limiting clamping sleeve are integrated into a whole, the pulling resistance is enhanced, and the phenomenon that water and gas enter a clamping and fixing component between two concretes to cause rusting or corrosion to affect the pulling resistance can be avoided.

Preferably, as shown in fig. 3a and 4, the sequence direction of the positioning plunger mounting holes 12 and the main rib fixing holes 14 on the end plate i is opposite to the sequence direction of the limiting ferrule mounting holes 13 and the main rib fixing holes on the end plate ii, in this embodiment, the sequence direction of the positioning plunger mounting holes 12 and the main rib fixing holes 14 on the end plate i is clockwise (as shown by the arrows in fig. 3a, the uppermost end is the large end of the gourd-shaped structure on the left side, the small end is on the right side, the large end of the gourd-shaped structure on the lowermost end plate i is on the right side, the small end is on the left side, and the gourd-shaped structures at other positions rotate in sequence), the sequence direction of the limiting ferrule mounting holes 13 and the main rib fixing holes on the end plate ii is counterclockwise (as shown by the arrows in fig. 4, the uppermost end is the large end of the gourd-shaped structure on the right side, the small end on the left side, and the large end of the gourd-shaped structure on, the gourd-shaped structures at other positions rotate in turn). With the end plate adopting the structure, as shown in fig. 13, the main reinforcement 8 of a single concrete pile can be parallel to the axis of the concrete pile, and meanwhile, when two or more sections of concrete piles are connected (the butt joint of 2 sections of piles is shown in the figure), as shown in the figure, each pair of corresponding main reinforcements 8 of the concrete pile are all positioned on the same straight line (only one pair of main reinforcements is shown in the figure), and the main reinforcements are positioned on the same axis, so that the uniformity of the pile body against external force is effectively ensured when the pile body is subjected to lateral pressure and/or shearing force.

Example 2

Fig. 14a, 14b and 14c show a second embodiment of a precast concrete pile connection structure according to the present invention, which is different from embodiment 1 in that, as shown in fig. 3b, in embodiment 1, two end faces of an end plate i (end plate ii) are flat steel plate structures, and therefore, as shown in fig. 3b, the thickness L of the end plate at the main tendon fixing hole 14 is reduced relative to the thickness at other positions, which causes the strength of the end plate at the main tendon fixing hole to be reduced, and reduces the shear resistance of the concrete pile. In this embodiment, a circular protrusion 141 is provided at a position corresponding to the main reinforcement fixing hole 14 on an end surface of the end plate i (end plate ii) contacting with the concrete, so that a thickness L1 of the end plate at the main reinforcement fixing hole is the same as that at other positions, and the strength of the end plate at the main reinforcement fixing hole is ensured, thereby enhancing the shear resistance of the concrete pile, compared to the concrete connection structure disclosed in embodiment 1. In the concrete pile, the thickness of end plate mainly is by the thickness decision of main muscle fixed orifices, in this embodiment, because main muscle fixed orifices department is equipped with circular protruding structure, has increased the end plate thickness of main muscle fixed orifices department, consequently, can adopt the less end board of thickness can reach the intensity the same with in embodiment 1. The structure of the main rib fixing hole of the end plate II is the same as that of the main rib fixing hole of the end plate I, and the end plate II also has a circular convex structure, so that a drawing is not provided independently. Other structures in this embodiment are the same as those in embodiment 1, and will not be described in detail here.

The utility model discloses a concrete pile connection structure can be applicable to various precast concrete piles such as tubular pile, square pile and abnormal shape stake.

The processing and production process of the concrete pile with the precast concrete pile connecting structure disclosed by the utility model is as follows;

as shown in fig. 12a, 12b, 12c and 12d, the end plate i 10 and the end plate ii 11 are fixed at two ends of the main reinforcement of the concrete pile, that is, two ends of the main reinforcement of the concrete pile are respectively installed in the main reinforcement fixing holes of the end plate i and the end plate ii to form a concrete pile reinforcement cage, a first steel plate 60 is placed at the outer side of one end of the end plate i 10, a second steel plate 61 is placed at the outer side of one end of the end plate ii 11, the steel plate is provided with a plurality of through holes with the same number as the number of the insertion rod mounting holes (limiting sleeve mounting holes), the positions of the through holes correspond to the positions of the insertion rod mounting holes (limiting sleeve mounting holes), a first bolt 62 is installed in the through hole of the first steel plate 61, the screw of the first bolt 62 passes through the through hole to be in threaded connection with the positioning insertion rod mounting holes 12 of the end plate i 10, and the screw of the first bolt 62 slightly extends out of the other end plate i 10, one end of the, the second steel plate 61 is connected with the end plate II 11 through a second bolt 63, namely, a screw rod of the second bolt 63 passes through a through hole of the second steel plate 61 and then is in threaded connection with a limiting clamping sleeve mounting hole on the end plate II 11, the length of the other end of the screw rod of the second bolt 63 extending out of the end plate II 11 is longer, then a steel reinforcement cage structure consisting of the steel plates, the end plates and the main reinforcements is arranged in a concrete pile pouring mould, the steel plates are fixed at the two ends of the mould, prestress is applied to the main reinforcement through the steel plate, concrete is poured into the concrete pile mould, the steel plate and the bolt are removed after the concrete is solidified to form a precast concrete pile, on the formed precast concrete pile, the part of the first bolt 62 extending out of the end plate I forms a first accommodating groove 64 in the concrete pile, and the part of the second bolt 63 extending out of the end plate II forms a second accommodating groove 65 in the concrete pile. Install the location inserted bar in the inserted bar mounting hole on end board I, first holding groove 64 can leave certain accommodation space for the fixing base of location inserted bar to the length at end board I is installed to the adjustment location inserted bar. The clamping and fixing component can be assembled into an integral structure in a factory and then installed in a limiting clamping sleeve installation hole of the end plate II, and the second accommodating groove 65 is used for accommodating the part (namely the guide support part, the holding spring, the clamping spring and the like) of the clamping and fixing component, which is long relative to the end plate. Different precast concrete piles can realize quick mechanical connection through the positioning inserted bar and the clamping and fixing component. Can know through the course of working of above concrete pile, the utility model discloses a concrete pile connection structure on the basis that does not change current concrete pile processing technology, only with the length increase of steel sheet and the fixed connecting bolt of end board, just can use the utility model discloses a connection structure, this connection simultaneously connects enough to have simple structure, and processing and simple to operate, quick have advantages such as resistance to plucking performance is good simultaneously.

The utility model discloses a concrete connection structure has following advantage for current staple bolt formula or box-like structure of tooth:

(1) in the aspects of compression resistance and shearing resistance

The meshing type concrete pile has the advantages that the plurality of accommodating boxes are arranged on the end face of the concrete pile, so that the sectional area of concrete on the end face of the concrete pile is reduced, and the compressive resistance of the concrete pile is reduced. The utility model discloses a concrete pile connection structure, concrete pile terminal surface only less be used for holding the recess that holds of solid subassembly of card for the concrete pile has stronger compressive strength.

(2) In the aspect of pulling resistance

The box-like concrete pile carries out the connection that mutual meshing realized the concrete pile through the latch on connecting inserted bar and the meshing, consequently, connects and to have certain play between the latch between inserted bar and the meshing, causes the withdrawal resistance of concrete pile to reduce, and the utility model discloses a concrete pile connection structure, after the plug inserts in the spacing cutting ferrule, the mutual joint of three conical surface has been realized to direction glide plane, spacing wedge card and plug mutual contact, and because in the spacing cutting ferrule and the injection of end plate drill way have epoxy structure to glue. After the epoxy resin structural adhesive is solidified, the limiting wedge clamp, the limiting clamp sleeve and the concrete groove are integrated, so that gaps cannot be generated after clamping, and the joint cannot crack to effectively guarantee the pulling strength of the joint.

(3) In terms of pressure-receiving side and/or shear resistance

When the hoop type concrete pile is installed, one section of concrete pile needs to be lifted and is butted with the other section of pile, then the pile is connected with each other through the hoop plate, therefore, the main reinforcement of the two sections of concrete piles which are connected with each other is difficult to ensure to be positioned on the same axis, and therefore when the concrete pile adopting the hoop form is subjected to lateral pressure or shearing force, the stress is not uniform due to the fact that the main reinforcement is not positioned on the same axis, and the concrete pile is damaged. And the utility model discloses a concrete pile connection structure is because the sequence direction of the location inserted bar mounting hole on the end board I and main muscle fixed orifices and the sequence direction of spacing cutting ferrule mounting hole on the end board II and main muscle fixed orifices are opposite for interconnect's concrete pile's main muscle is in same axis, when having ensured effectively that the pile body receives side pressure and/or shear force, the homogeneity of external force is resisted to the pile body.

(4) Product processing

The concrete pile with the hoop type structure adopts the hoop plates to connect the two end head plates, and the end head plates need to be processed with grooves, so the thickness of the end head plates is increased, the product cost is increased,

in the processing process of the concrete pile with the tooth-like structure, the spring, the tooth combination piece and the fixing piece need to be arranged in the containing box, and the containing box is welded on the end plate respectively, so that the structure has the advantages of more parts, complex processing technology, and consumption of processing time and processing cost.

The utility model discloses a concrete pile connection structure under the prerequisite that does not change the structure or the production technology of current concrete pile, only needs to increase the length that the screw rod stretches out the end board, for staple bolt formula and ratcheting type structure, has saved product cost.

(5) Production application

Because the end plate of the concrete pile of the hoop type structure needs to be increased in thickness and the end plate of the concrete pile of the tooth type structure needs to be welded with the accommodating box, the end plates of the two structures are not in the end plate form specified in the national standard, and therefore the problem of high processing cost is solved.

Simultaneously, the concrete pile of box-like structure pours the in-process at the concrete pile, in order to prevent that the concrete thick liquid from getting into and holding the box, need will connect the inserted bar fixed orifices and plug the pole through-hole with the filler and all block up to pour at the concrete pile and accomplish the back, get rid of the filler, cause the production troublesome.

The utility model discloses a concrete pile connection structure, concrete pile's end board is the end board of national standard regulation, consequently has with low costs.

(6) On-site construction

The staple bolt formula concrete pile needs to hoist a section of concrete pile and rotate at the work progress to screw hole one-to-one on two sections upper and lower concrete piles, then connect two concrete piles through embracing the hoop board, increased site constructor's working strength.

The utility model discloses a concrete pile connection structure, the plug can be convenient insert the solid subassembly of card, reduced construction worker's working strength.

The above-mentioned embodiments are only for describing the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art without departing from the design spirit of the present invention should fall into the protection scope defined by the claims of the present invention.

Claims (10)

1. The utility model provides a precast concrete pile connection structure, includes end board I (10), end board II (11), location inserted bar (2) and the solid subassembly of card, install on end board I (10) location inserted bar (2), the solid subassembly of card is installed on end board II (11), its characterized in that: the clamping and fixing component comprises a limiting clamping sleeve (3), a limiting wedge clamp (4) and a holding spring (5); the positioning inserted rod (2) comprises a fixing seat (20) and a plug (21) arranged on the fixing seat (20), a positioning inserted rod mounting hole (12) is formed in an end plate I (10), the fixing seat (20) is in threaded connection with the positioning inserted rod mounting hole (12), a containing space (30) for inserting the plug (21) is formed in the limiting clamping sleeve (3), the limiting clamping sleeve (3) comprises a limiting clamping sleeve body (31) and a guiding support part (32) arranged at one end of the limiting clamping sleeve body (31), a limiting clamping sleeve mounting hole (13) is formed in an end plate II (11), the outer wall of the limiting clamping sleeve body (31) is in threaded connection with the limiting clamping sleeve mounting hole (13), more than one guiding sliding groove (33) is formed in the guiding support part (32), and the limiting wedge (4) is arranged in the guiding sliding groove (33), spacing cutting ferrule body (31) is equipped with direction glide plane (34) with the one end inboard of spacing wedge card (4) contact, spacing wedge card (4) can slide along direction glide plane (34) in direction spout (33), plug (21) and spacing wedge card (4) contact department are plug clamping face (22), be equipped with wedge card glide plane (40) with direction glide plane (34) contact and wedge card clamping face (41) with plug clamping face (22) contact on spacing wedge card (4), hold power spring (5) cover in the outside of direction supporting part (32), be equipped with the spring limit structure that prevents holding power spring (5) and drop on the outer wall of the one end of keeping away from spacing wedge card (4) of direction supporting part (32), hold power spring (5) and be located between spacing wedge card (4) and the spring limit structure in the axial direction, plug (21) can insert accommodation space (30) and kick-back through holding power spring (5) with spacing wedge card (4) The connection between the positioning inserted rod and the limiting clamping sleeve is further realized by pushing the guide sliding surface (34) and the clamping surface (22) of the plug.

2. The precast concrete pile connection structure according to claim 1, wherein: be equipped with inserted bar butt face (23) between fixing base (20) and plug (21), be equipped with on the internal diameter of the male one end of location inserted bar of spacing cutting ferrule (3) and insert spacing face (39), work as when the plug inserts spacing cutting ferrule, inserted bar butt face with insert spacing face butt.

3. The precast concrete pile connection structure according to claim 1 or 2, wherein: the number of the guide sliding chutes (33) is 3 or 4, the sections of the guide sliding chutes (33) are fan-shaped, and the central angles corresponding to the fan-shaped sections of the guide sliding chutes are 30-90 degrees.

4. The precast concrete pile connection structure according to claim 1, wherein: the spring limiting structure is a limiting bulge integrated with the guide supporting part or a clamp spring structure arranged at one end of the guide supporting part.

5. The precast concrete pile connection structure according to claim 1, wherein: at least one of the guide sliding surface, the wedge card clamping surface, the wedge card sliding surface and the plug clamping surface is provided with an anti-slip structure.

6. The precast concrete pile connection structure according to claim 5, wherein: the anti-slip structure is a latch or a taper thread.

7. The precast concrete pile connection structure according to claim 1, wherein: one end of the holding spring (5) close to the limiting wedge clamp (4) is also provided with an inner concave part (50) bent to the center line of the holding spring, and when the holding spring (5) is sleeved outside the guide supporting part (32), the inner concave part (50) is arranged in the guide sliding groove (33) and is abutted against one end, far away from the guide sliding surface (34), of the limiting wedge clamp (4).

8. The precast concrete pile connection structure according to claim 1, wherein: and a clamping structure is further arranged at one end, inserted by the positioning inserted rod, of the limiting clamping sleeve (3).

9. The precast concrete pile connection structure according to claim 1, wherein: a first apron board (15) is further arranged on the end plate I (10), and a second apron board (16) is arranged on the end plate II (11); and a plurality of main rib fixing holes are formed in the end plate I and the end plate II, and circular bulges are arranged at positions corresponding to the main rib fixing holes on the end plate I and the end plate II, which are in contact with concrete, on one end face.

10. The precast concrete pile connection structure according to claim 9, wherein: and epoxy resin structural adhesive is also coated between the end plate I (10) and the end plate II (11).