CN115142402A - Quick-connection prefabricated pile cap for composite foundation and connection method thereof - Google Patents

Quick-connection prefabricated pile cap for composite foundation and connection method thereof Download PDF

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Publication number
CN115142402A
CN115142402A CN202210761942.6A CN202210761942A CN115142402A CN 115142402 A CN115142402 A CN 115142402A CN 202210761942 A CN202210761942 A CN 202210761942A CN 115142402 A CN115142402 A CN 115142402A
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CN
China
Prior art keywords
pile cap
precast pile
cap body
plug
connector
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Granted
Application number
CN202210761942.6A
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Chinese (zh)
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CN115142402B (en
Inventor
吴磊磊
张志峰
张胜
陈修和
赵宇
赵华宏
李昊煜
温广军
李翻翻
陈星�
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Anhui Transport Consulting and Design Institute Co Ltd
Highway Traffic Energy Saving and Environmental Protection Technology and Equipment Transportation Industry R&D Center
Original Assignee
Anhui Transport Consulting and Design Institute Co Ltd
Highway Traffic Energy Saving and Environmental Protection Technology and Equipment Transportation Industry R&D Center
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Application filed by Anhui Transport Consulting and Design Institute Co Ltd, Highway Traffic Energy Saving and Environmental Protection Technology and Equipment Transportation Industry R&D Center filed Critical Anhui Transport Consulting and Design Institute Co Ltd
Priority to CN202210761942.6A priority Critical patent/CN115142402B/en
Publication of CN115142402A publication Critical patent/CN115142402A/en
Application granted granted Critical
Publication of CN115142402B publication Critical patent/CN115142402B/en
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22—Piles
    • E02D5/24—Prefabricated piles
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/72—Pile shoes

Abstract

The invention discloses a quick-connection prefabricated pile cap for a composite foundation and a connection method thereof, wherein the quick-connection prefabricated pile cap comprises a prefabricated pile cap body, wherein a plurality of connectors and anchoring steel bars are arranged in the prefabricated pile cap body; the connector is provided with internal threads, one end of the connector, which is positioned in the prefabricated pile cap body, is in threaded connection with the anchoring steel bar, and the other end of the connector is in threaded connection with a plurality of plug-in units; the plug-in components are of rod-shaped structures, second external threads matched with the internal threads of the connector are arranged at one ends of the plug-in components, concave portions and convex portions are arranged at the other ends of the plug-in components, when the plug-in components are connected, the prefabricated pile cap is lifted, the plug-in components connected to the prefabricated pile cap body are aligned to connecting holes in the tops of the prefabricated piles to be connected, the prefabricated pile cap is put down to enable the plug-in components to enter the connecting holes, and the concave portions of the plug-in components are clamped by clamping components in the connecting holes, so that connection is rapidly completed. The invention effectively improves the connection quality of the precast pile and the precast pile cap, and has simple connection process and high connection efficiency.

Description

Quick-connection prefabricated pile cap for composite foundation and connection method thereof
Technical Field
The invention relates to the technical field of composite foundations, in particular to a prefabricated pile cap of a composite foundation, and specifically relates to a prefabricated pile cap capable of being quickly connected with a prefabricated pile and a quick connection method thereof.
Background
In the case of engineering construction in soft ground, ground treatment is usually required. In recent years, precast piles represented by pipe piles are widely used in foundation treatment, and good treatment effects are achieved. When a road or a municipal road embankment is filled on a soft soil foundation, a pile cap is usually connected to the pile top of the precast pile to transmit more embankment load to the pile body and transmit the embankment load to the foundation through the pile, so that the advantage of high strength of the precast pile material is fully exerted.
The pile cap of the precast pile mainly comprises two construction methods of cast-in-place and prefabrication at present. The cast-in-place pile cap has the advantages that the pile top is welded with the steel bar and anchored into the pile cap, the steel bar is connected with the steel bar framework of the pile cap into a whole, and concrete is poured into the pile hole and the pile cap into a whole, so that the good connection performance of the pile top and the pile cap can be ensured.
Prefabricated pile cap passes through batch production for the utilization efficiency of labour and resource is higher, has avoided more wasting of resources, and product quality is guaranteed, and the field installation is more convenient, and construction speed is fast, need not the later stage maintenance simultaneously, and its shortcoming lies in: the installation quality of the pile cap is critical, if the pile cap cannot be effectively connected with the pile top, the pile cap can incline in the construction process, the embankment filling load cannot be effectively transferred to the pile body, and the foundation treatment effect is greatly influenced; meanwhile, in the existing connection technology of the prefabricated pile cap and the pile top, a hinged mode is partially adopted, namely, only a vertical non-through hole matched with the section of the pile is arranged at the bottom of the prefabricated pile cap, the size of the hole is slightly larger than that of the pile, and the pile top is placed into the hole during installation; the method also comprises the steps of arranging two-stage holes on the prefabricated pile cap, wherein the first-stage hole is adaptive to the outer diameter of the pile, the second-stage hole is adaptive to the inner diameter of the pile hole, the first-stage hole is connected with the second-stage hole and penetrates through the height direction of the prefabricated pile cap, the pile top is arranged in the first-stage hole during field installation, concrete is poured into the pile hole through the second-stage hole until the top surface of the pile cap, so that the connecting effect of the pile cap and the pile is enhanced, but the assembly construction is not completely realized, the pile cap structure has a part of cast-in-place workload, and the defect of the cast-in-place pile cap is not completely avoided; in addition, expansion bolts are arranged after the top surface of the tubular pile is drilled, connecting reinforcing steel bars are inserted into reserved holes of the prefabricated pile caps, and the reserved holes are subjected to grouting after installation.
From above, the problem that current precast pile cap technique shows in engineering practice mainly includes: (1) The connection performance of the prefabricated pile cap and the pile top is poor, and when the load is eccentric, the pile cap is easy to separate from the pile cap or partially separate from the pile cap; (2) The prefabricated pile cap is connected with the pile top, the assembly construction is not completely realized, and partial cast-in-place is still needed; (3) When the prefabricated pile cap is connected with the pile top, the connection process is complex, the number of working procedures is large, the connection efficiency is low, and the connection is not convenient enough.
Disclosure of Invention
The invention aims to solve the technical problem of providing a prefabricated pile cap which can effectively improve the connection quality of the prefabricated pile cap and the pile top, is constructed in a full-assembly manner and can be quickly connected with the pile top.
The present invention solves the above technical problems the adopted technical scheme is as follows:
a quick-connection prefabricated pile cap for a composite foundation comprises a prefabricated pile cap body, wherein a connector and anchoring steel bars are arranged in the prefabricated pile cap body;
the connector is of a hollow cylindrical structure provided with internal threads;
the connectors are arranged in a plurality of numbers, and all the connectors of a single prefabricated pile cap body are arranged at the same horizontal position;
the bottom surfaces of the connectors are all the prefabricated pile cap body is positioned on the bottom surface of the prefabricated pile cap body;
one end of the connector, which is positioned in the prefabricated pile cap body, is connected with an anchoring steel bar;
one end of the anchoring steel bar connected with the connector is provided with a first external thread matched with the internal thread of the connector;
the other end of the anchoring steel bar extends along the thickness direction of the prefabricated pile cap body, and when the anchoring length does not meet the design requirement, the anchoring steel bar is bent towards the side edge direction of the prefabricated pile cap body;
the other end of the connector is in threaded connection with a plurality of plug-in components;
the plug-in components are of rod-shaped structures, second external threads matched with the internal threads of the connector are arranged at one ends of the plug-in components, and concave parts and convex parts are arranged at the other ends of the plug-in components.
The optimized technical measures further comprise:
when the bottom surface of the prefabricated pile cap body is a plane, the bottom surfaces of the connectors are all positioned on the first bottom surface of the prefabricated pile cap body;
when the bottom surface of the prefabricated pile cap body is a plane containing the preformed hole, the bottom surfaces of the connectors are all positioned on a second bottom surface of the prefabricated pile cap body, and the second bottom surface is the top surface of the preformed hole; the connector is arranged in a round shape, a square shape or a polygon shape.
The outer wall of the connector is a smooth circular surface or is provided with a third external thread.
The anchoring reinforcing bar be screw-thread reinforcing bar or plain round steel bar, the tip that has first external screw thread of anchoring reinforcing bar is the plane of the first external screw thread section reinforcing bar extending direction of perpendicular to.
The sum of the length of the first external thread section of the anchoring steel bar and the length of the second external thread section of the plug-in unit is not more than the length of the connector.
The thread forms of the inner thread of the connector, the first outer thread of the anchoring reinforcing steel bar, the second outer thread of the insert and the third outer thread of the connector are straight threads or inclined threads.
The quantity of the plug-in components is the same as the quantity of the connecting holes of the pile top of the precast pile to be connected, the size and the specification of the plug-in components connected with the same precast pile cap body are the same, and the bottom end points of the plug-in components are located on the same plane after the plug-in components are connected with the precast pile cap body.
The top surface of precast pile cap body be equipped with rings, the side of precast pile cap body is equipped with and is no less than two first marks, first mark is straight line or recess or the fin of vertical extension certain length along, the vertical central line of arbitrary one first mark, apart from vertical axis, the vertical axis of precast pile cap body of an arbitrary one first mark nearest connector all coexist on a vertical plane, the central point of the top surface of precast pile cap body still is provided with the second mark.
The invention also provides a connecting method of the quick-connecting prefabricated pile cap for the composite foundation, which comprises the following steps:
1) Hoisting the prefabricated pile cap body by using mechanical equipment, spirally connecting one end of the plug-in with a second external thread with a connector at the bottom of the prefabricated pile cap body, and enabling bottom end points of all the plug-in to be located on the same horizontal plane after the plug-in is connected with the prefabricated pile cap body;
2) Placing a clamping piece in a connecting hole at the top of the precast pile;
3) Leveling the precast pile cap body, and slowly moving the precast pile cap body to the position above the precast pile to be connected so that the position of the plug-in unit is aligned to the position of the connecting hole at the top of the precast pile;
4) And slowly and vertically putting down the prefabricated pile cap body, enabling the plug-in piece to enter the connecting hole, and enabling the clamping piece to clamp the concave part of the plug-in piece or the transition section of the concave part and the convex part to finish connection.
The optimized technical measures further comprise: after the clamping piece is placed in the connecting hole at the top of the precast pile, epoxy resin can be poured in the connecting hole and on the top surface of the precast pile.
Compared with the prior art, the invention has the beneficial effects that:
(1) The prefabricated pile cap and the pile top have good connection performance, the tensile property, the bending resistance and the shearing resistance can be matched according to design requirements, the performance of the prefabricated pile cap and the pile top can be equal to that of the pile body, and the prefabricated pile cap and the pile top are prevented from being separated under the action of eccentric load;
(2) The prefabricated pile cap is connected with the pile top, so that the assembly construction is completely realized, and the mold erection, the concrete cast-in-place and the maintenance are not needed;
(3) When the prefabricated pile cap is connected with the pile top, the construction process is simple, the working procedures are few, and the method is quick and convenient.
Drawings
Fig. 1 is a three-dimensional perspective view showing the overall structure of a precast pile cap body of a quick-connect precast pile cap for a composite foundation according to the present invention (the cross section is circular, the bottom surface is a plane, and connectors and anchoring steel bars are arranged in a circular shape).
Fig. 2 is a side perspective view showing the overall structure of a precast pile cap body of a quick connecting precast pile cap for a composite foundation according to the present invention (the cross section is circular, the bottom surface is a plane, and connectors and anchoring bars are arranged in a circular shape).
Fig. 3 is a bottom view of the precast pile cap body of the quick connecting precast pile cap for a composite foundation according to the present invention (the cross section is circular, the bottom surface is a plane, the connectors are arranged in a circle, and the connectors and the anchoring steel bars are arranged in a circle).
Fig. 4 is a top perspective view of a precast pile cap body of a quick connect precast pile cap for a composite foundation according to the present invention (cross section is circular, bottom surface is flat, connectors and anchoring bars are arranged in a circle).
Fig. 5 is a three-dimensional structure diagram of a connector for a quick-connection precast pile cap for a composite foundation according to the present invention (the outer wall of the connector is a smooth circular surface).
Fig. 6 is a side view of an anchoring bar of a quick connect precast pile cap for a composite foundation according to the present invention (the anchoring bar is bent at one end).
Fig. 7 is a schematic view showing a state of a connector for quickly connecting a precast pile cap for a composite foundation according to the present invention in a process of butting an anchoring reinforcement (the outer wall of the connector is a smooth circular surface, and one end of the anchoring reinforcement is bent).
Fig. 8 is a schematic view showing a state in which the connector for quickly connecting the precast pile caps for a composite foundation according to the present invention is completely butted with the anchoring bars (the outer wall of the connector is a smooth circular surface, and one end of the anchoring bar is bent).
Fig. 9 is a schematic structural view of an insert for a quick-connect precast pile cap for a composite foundation according to the present invention.
Fig. 10 is a three-dimensional perspective view showing the connection process of the precast pile cap body and the insert of the quick connection precast pile cap for a composite foundation according to the present invention (the cross section is circular, the bottom surface is a plane, and the connectors are arranged in a circle).
Fig. 11 is a side perspective view showing the connection process between the precast pile cap body and the insert of the quick connecting precast pile cap for composite foundation according to the present invention (cross section is circular, bottom surface is flat, and connectors are arranged in a circular shape).
Fig. 12 is a three-dimensional perspective view showing a connection completion state of a precast pile cap body and an insert of a quick connection precast pile cap for a composite foundation according to the present invention (a cross section is circular, a bottom surface is a plane, and connectors are arranged in a circular shape).
Fig. 13 is a side perspective view showing a connection completion state of a precast pile cap body and an insert of a quick connection precast pile cap for a composite foundation according to the present invention (cross section is circular, bottom surface is a plane, and connectors are arranged in a circular shape).
Fig. 14 is a three-dimensional perspective view showing the connection process between a precast pile cap and a precast pile for quick connection of a composite foundation according to the present invention (cross section is circular, bottom surface is flat, connectors are arranged in a circular shape, and the precast pile is a tubular pile).
Fig. 15 is a side perspective view showing a connection process state of a precast pile cap and a precast pile for quick connection of a composite foundation according to the present invention (the cross section is circular, the bottom surface is a plane, the connectors are arranged in a circular shape, and the precast pile is a tubular pile).
Fig. 16 is a three-dimensional perspective view showing a connection completion state of a precast pile cap and a precast pile for quick connection of a composite foundation according to the present invention (the cross section is circular, the bottom surface is a plane, the connectors are arranged in a circular shape, and the precast pile is a tubular pile).
Fig. 17 is a side perspective view showing a connection completion state of a rapid connecting precast pile cap and a precast pile for a composite foundation according to the present invention (the cross section is circular, the bottom surface is a plane, the connectors are arranged in a circular shape, and the precast pile is a tubular pile).
Fig. 18 is a partial side perspective view showing a connection completion state of a rapid connection precast pile cap and a precast pile for a composite foundation according to the present invention (the cross section is circular, the bottom surface is a plane, the connectors are arranged in a circular shape, and the precast pile is a tubular pile).
Fig. 19 is a side view schematically showing a quick-connect precast pile cap (provided with a suspension ring) for a composite foundation according to the present invention.
Fig. 20 is a three-dimensional perspective view showing the whole structure of a precast pile cap body of a quick connecting precast pile cap for a composite foundation according to the present invention (cross section is square, bottom surface is flat, and connectors and anchoring steel bars are arranged in a square).
Fig. 21 is a side perspective view showing the overall structure of a precast pile cap body of a quick connecting precast pile cap for a composite foundation according to the present invention (cross section is square, bottom surface is flat, and connectors and anchoring bars are arranged in a square).
Fig. 22 is a bottom view of a precast pile cap body of a quick connecting precast pile cap for a composite foundation according to the present invention (cross section is square, bottom surface is plane, connectors are arranged in square, connectors and anchoring steel bars are arranged in square).
Fig. 23 is a top perspective view of a precast pile cap body of a quick connect precast pile cap for a composite foundation according to the present invention (cross section is square, bottom surface is flat, connectors and anchoring bars are arranged in square).
Fig. 24 is a three-dimensional perspective view showing the connection process between the precast pile cap body and the insert of the quick connection precast pile cap for a composite foundation according to the present invention (the cross section is square, the bottom surface is a plane, and the connectors are arranged in a square).
Fig. 25 is a side perspective view showing a connection process state of a precast pile cap body and an insert of a quick connection precast pile cap for a composite foundation according to the present invention (cross section is square, bottom surface is flat, and connectors are arranged in a square).
Fig. 26 is a three-dimensional perspective view showing a connection completion state of a precast pile cap body and an insert of a quick connection precast pile cap for a composite foundation according to the present invention (cross section is square, bottom surface is flat, and connectors are arranged in a square).
Fig. 27 is a side perspective view showing a connection completion state of a precast pile cap body and an insert of a quick connection precast pile cap for a composite foundation according to the present invention (cross section is square, bottom surface is flat, and connectors are arranged in a square).
Fig. 28 is a three-dimensional perspective view showing the connection process between the precast pile cap and the precast pile for quick connection of a composite foundation according to the present invention (the cross section is square, the bottom surface is a plane, the connectors are arranged in a square, and the precast pile is a square pile).
Fig. 29 is a side perspective view showing a connection process state of a precast pile cap and a precast pile for quick connection of a composite foundation according to the present invention (the cross section is square, the bottom surface is a plane, the connectors are arranged in a square, and the precast pile is a square pile).
Fig. 30 is a three-dimensional perspective view showing a connection completion state of a rapid connection precast pile cap and a precast pile for a composite foundation according to the present invention (the cross section is square, the bottom surface is a plane, the connectors are arranged in a square, and the precast pile is a square pile).
Fig. 31 is a side perspective view showing a connection completion state of a rapid connection precast pile cap and a precast pile for a composite foundation according to the present invention (the cross section is square, the bottom surface is a plane, the connectors are arranged in a square, and the precast pile is a square pile).
Fig. 32 is a partial side perspective view showing a connection completion state of a rapid-connection precast pile cap and a precast pile for a composite foundation according to the present invention (the cross section is square, the bottom surface is a plane, the connectors are arranged in a square, and the precast pile is a square pile).
Fig. 33 is a three-dimensional perspective view showing the overall structure of a precast pile cap body of a quick connect precast pile cap for a composite foundation according to the present invention (cross section is square, bottom surface is flat, connectors and anchoring bars are arranged in a circle).
Fig. 34 is a side perspective view showing the whole structure of a precast pile cap body of a quick connect precast pile cap for a composite foundation according to the present invention (cross section is square, bottom surface is flat).
Fig. 35 is a bottom view of a precast pile cap body of a quick connect precast pile cap for a composite foundation according to the present invention (cross section is square, bottom surface is flat, connectors are arranged in a circle).
Fig. 36 is a top perspective view of a precast pile cap body of a quick connect precast pile cap for a composite foundation according to the present invention (cross section is square, bottom surface is flat, connectors and anchoring bars are arranged in a circle).
Fig. 37 is a three-dimensional perspective view showing the connection process of the precast pile cap body and the insert of the quick connection precast pile cap for a composite foundation according to the present invention (the cross section is square, the bottom surface is a plane, and the connectors are arranged in a circle).
Fig. 38 is a side perspective view showing a connection process of a precast pile cap body and an insert of a quick connection precast pile cap for a composite foundation according to the present invention (cross section is square, bottom surface is flat, and connectors are arranged in a circle).
Fig. 39 is a three-dimensional perspective view showing a connection completion state of a precast pile cap body and an insert of a quick connection precast pile cap for a composite foundation according to the present invention (cross section is square, bottom surface is flat, and connectors are arranged in a circle).
Fig. 40 is a side perspective view showing a connection completion state of a precast pile cap body and an insert of a quick connecting precast pile cap for a composite foundation according to the present invention (cross section is square, bottom surface is flat, and connectors are arranged in a circular shape).
Fig. 41 is a three-dimensional perspective view showing the connection process of the precast pile cap and the precast pile for quick connection of a composite foundation according to the present invention (the cross section is square, the bottom surface is a plane, the connectors are arranged in a circle, and the precast pile is a tubular pile).
Fig. 42 is a three-dimensional perspective view showing a connection completion state of a precast pile cap and a precast pile for quick connection of a composite foundation according to the present invention (the cross section is square, the bottom surface is a plane, connectors are arranged in a circle, and the precast pile is a tubular pile).
Fig. 43 is a three-dimensional perspective view showing the connection process between a precast pile cap and a precast pile for quick connection of a composite foundation according to the present invention (the cross section is square, the bottom surface is flat, the connectors are arranged in a circular shape, and the precast pile is a square pile).
Fig. 44 is a three-dimensional perspective view showing a connection completion state of a rapid connecting precast pile cap and a precast pile for a composite foundation according to the present invention (the cross section is square, the bottom surface is a plane, the connectors are arranged in a circular shape, and the precast pile is a square pile).
Fig. 45 is a three-dimensional perspective view showing the overall structure of a precast pile cap body of a quick-connect precast pile cap for a composite foundation according to the present invention (the cross section is square, the bottom surface includes a prepared hole, and connectors and anchoring steel bars are arranged in a circle).
Fig. 46 is a side perspective view showing the overall structure of a precast pile cap body of a quick connect precast pile cap for a composite foundation according to the present invention (the cross section is square, the bottom surface includes a prepared hole, and connectors and anchoring bars are arranged in a circle).
Fig. 47 is a three-dimensional structure view of a connector for a quick-connect precast pile cap for a composite foundation according to the present invention (the outer wall of the connector is provided with external threads).
Fig. 48 is a schematic view showing a state of a process of butting a connector for quickly connecting a precast pile cap with an anchoring steel bar for a composite foundation according to the present invention (the outer wall of the connector is provided with external threads, and one end of the anchoring steel bar is bent).
Fig. 49 is a schematic view showing a state in which the connector for quickly connecting the precast pile caps for a composite foundation according to the present invention is completely butted with the anchoring bars (the outer wall of the connector is provided with external threads, and one end of the anchoring bar is bent).
Fig. 50 is a three-dimensional perspective view showing the connection process between the precast pile cap body and the insert for the quick connection precast pile cap for a composite foundation according to the present invention (the cross section is square, the bottom surface includes a prepared hole, and the connectors and the anchoring bars are arranged in a circle).
Fig. 51 is a side perspective view showing a connection process of a precast pile cap body and an insert of a quick connection precast pile cap for a composite foundation according to the present invention (the cross section is square, the bottom surface includes a prepared hole, and connectors and anchoring bars are arranged in a circle).
Fig. 52 is a three-dimensional perspective view showing a connection completion state of a precast pile cap body and an insert of a quick connection precast pile cap for a composite foundation according to the present invention (the cross section is square, the bottom surface includes a prepared hole, and the connector and the anchoring steel bar are arranged in a circle).
Fig. 53 is a side perspective view showing a connection completion state of a precast pile cap body and an insert of a quick connection precast pile cap for a composite foundation according to the present invention (the cross section is square, the bottom surface includes a prepared hole, and connectors and anchoring steel bars are arranged in a circle).
Fig. 54 is a three-dimensional perspective view showing the connection state of the precast pile cap and the precast pile for quick connection of a composite foundation according to the present invention (the cross section is square, the bottom surface includes a prepared hole, the connector and the anchoring bar are arranged in a circle, and the precast pile is a tubular pile).
Fig. 55 is a side perspective view showing the connection process between the precast pile cap and the precast pile for quick connection of a composite foundation according to the present invention (the cross section is square, the bottom surface includes a prepared hole, the connector and the anchor bar are arranged in a circular shape, and the precast pile is a tubular pile).
Fig. 56 is a three-dimensional perspective view showing a connection completion state of a precast pile cap and a precast pile for quick connection of a composite foundation according to the present invention (the cross section is square, the bottom surface includes a prepared hole, connectors and anchoring bars are arranged in a circular shape, and the precast pile is a tubular pile).
Fig. 57 is a side perspective view showing a connection completion state of a precast pile cap and a precast pile for quick connection of a composite foundation according to the present invention (the cross section is square, the bottom surface includes a prepared hole, the connector and the anchor bar are arranged in a circular shape, and the precast pile is a tubular pile).
Fig. 58 is a three-dimensional perspective view showing the overall structure of a precast pile cap body of a quick connect precast pile cap for a composite foundation according to the present invention (the cross section is square, the bottom surface includes a prepared hole, and connectors and anchoring bars are arranged in a circle).
Fig. 59 is a three-dimensional perspective view showing a connection process state of a precast pile cap body and an insert of a quick connection precast pile cap for a composite foundation according to the present invention (the cross section is square, the bottom surface includes a prepared hole, and connectors and anchoring bars are arranged in a circle).
Fig. 60 is a three-dimensional perspective view showing a connection completion state of a precast pile cap body and an insert for a quick connection precast pile cap for a composite foundation according to the present invention (the cross section is square, the bottom surface includes a prepared hole, and the connector and the anchoring reinforcement are arranged in a circular shape).
Fig. 61 is a three-dimensional perspective view showing the connection state of the precast pile cap and the precast pile for quick connection of a composite foundation according to the present invention (the cross section is square, the bottom surface includes a preformed hole, the connector and the anchoring reinforcement are arranged in a circular shape, and the precast pile is a tubular pile).
Fig. 62 is a three-dimensional perspective view showing a connection completion state of a precast pile cap and a precast pile for quick connection of a composite foundation according to the present invention (the cross section is square, the bottom surface includes a prepared hole, connectors and anchoring bars are arranged in a circular shape, and the precast pile is a tubular pile).
Fig. 63 is a side view (anchor bar straight) of an anchor bar of a quick-connect precast pile cap for a composite foundation according to the present invention.
Fig. 64 is a schematic view showing a state of a connector for quickly connecting a precast pile cap for a composite foundation according to the present invention in a butt joint process with an anchoring bar (the outer wall of the connector is a smooth circular surface, and the anchoring bar is straight).
Fig. 65 is a schematic view showing a state in which the connector for quickly connecting the precast pile caps for a composite foundation of the present invention is completely butted with the anchoring reinforcement (the outer wall of the connector is a smooth circular surface, and the anchoring reinforcement is straight).
Fig. 66 is a schematic view showing a state of a connector for quickly connecting a precast pile cap for a composite foundation according to the present invention in a process of butting the connector with an anchoring bar (the outer wall of the connector is a smooth circular surface, and one end of the anchoring bar is provided with a hook).
Fig. 67 is a schematic view showing a state in which a connector for quickly connecting a precast pile cap for a composite foundation according to the present invention is completely butted with an anchoring reinforcement (the outer wall of the connector is a smooth circular surface, and one end of the anchoring reinforcement is provided with a hook).
Fig. 68 is a three-dimensional perspective view showing the whole structure of a precast pile cap body of a quick connecting precast pile cap for a composite foundation according to the present invention (cross section is circular, bottom surface is flat, connectors and anchoring bars are arranged in a circular shape, side surfaces are provided with first marks, and top surfaces are provided with second marks).
Fig. 69 is a top perspective view of a precast pile cap body of a quick connect precast pile cap for composite foundation according to the present invention (cross section is circular, bottom surface is flat, connectors and anchoring bars are arranged in a circle, side surface is provided with a first mark, top surface is provided with a second mark).
Reference numerals: 1-prefabricating a pile cap body; 11-a first bottom surface; 12-preparing holes; 13-a second bottom surface; 2-a connector; 21-internal thread; 22-a third external thread; 3-anchoring the steel bar; 31-a first external thread; 4-a plug-in; 41-second external thread; 42-a recess; 43-convex part; 5-connecting holes; 6-hoisting rings; 7-a first marker; 8-second marker.
Detailed Description
The present invention will be further described in detail with reference to the drawings and examples, so as to more clearly and completely describe the technical scheme of the present invention. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. The following description of at least one embodiment is illustrative in nature and is in no way intended to limit the invention, its application, or uses. Other embodiments, which can be derived by one of ordinary skill in the art from the embodiments of the present invention without creative efforts, shall fall within the protection scope of the present invention. Unless specifically stated otherwise, the relative positions, numbers, sizes of the components and steps set forth in these embodiments do not limit the scope of the invention.
For convenience, spatially relative terms, such as "vertical," "horizontal," "above," and the like, are used in the embodiments to describe one element or feature's spatial relationship to another element or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the component in use or operation in addition to the orientation depicted in the figures.
In the description of the present invention, it is to be noted that the terms "inside", "outside wall", "horizontal", "inside", "outside", "one end", "the other end", "the end", "bottom", "top" and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the components referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and in addition, for the purpose of convenience of description, vertical and horizontal are directions perpendicular to each other, and two directions in the vertical direction are upward and downward, respectively.
Example 1:
as shown in fig. 1 to 4, the quick-connection precast pile cap for a composite foundation of the present invention includes a precast pile cap body having a circular cross section, and a connector and an anchoring steel bar are provided in the precast pile cap body.
As shown in fig. 5, the connector is a hollow cylinder structure with internal threads, and the outer wall of the connector is a smooth circular surface.
As shown in fig. 1 to 3, the number of the connectors is several, and all the connectors of a single precast pile cap body are circularly arranged at the same horizontal position, that is, the centers of all the connectors are located on the circumference of the same circle. The number of the connectors is generally the same as the number of the connecting holes of the pile top of the precast pile to be connected.
As shown in fig. 1 to fig. 3, the bottom surface of the preformed pile cap body is a plane, and the bottom surfaces of the connectors are all located on the first bottom surface of the preformed pile cap body. Because the connection quality requirement of the precast pile cap and the precast pile is high, part of the prior art is that the bottom surface of the precast pile cap comprises a reserved hole so as to anchor the precast pile into the precast pile cap for a certain depth; the other part of the prior art contains a vertical through hole for the prefabricated pile cap body, so that an anchor bolt for later construction can pass through. According to the invention, through an effective connection means, a preformed hole is not required to be arranged on the prefabricated pile cap body, and a vertically through hole is not required to be reserved in the prefabricated pile cap body.
As shown in fig. 1 to 2, the end of the connector inside the precast pile cap body is connected with an anchoring steel bar to prevent the quick connection structure of the precast pile cap and the precast pile of the present invention from failing under special circumstances.
As shown in fig. 6 to 7, the end of the anchoring bar connected to the connector is provided with a first external thread matching the internal thread of the connector. The state after the anchoring bar is screw-coupled to the connector is shown in fig. 8.
As shown in fig. 1, 2 and 6, the other end of the anchoring steel bar extends along the thickness direction of the precast pile cap body and then bends up toward the side edge of the precast pile cap body.
As shown in fig. 9 to 13, the other end of the connector is spirally connected with a plurality of inserts.
As shown in fig. 9, the plug-in unit is a rod-shaped structure, one end of the plug-in unit is provided with a second external thread matching with the internal thread of the connector, and the other end of the plug-in unit is provided with a concave part and a convex part which are concave and convex relative to the plug-in unit rod body.
In order to further optimize the quick-connection precast pile cap for the composite foundation, the embodiment of the invention comprises the following steps:
as shown in fig. 6 to 7, the anchoring bar is a threaded bar, and the most end portion of the anchoring bar having the first external thread is a plane perpendicular to the extending direction of the first external thread section bar. In order to utilize the connection performance of the internal thread section of the connector to the maximum extent, the most end part of the thread of the anchoring reinforcing steel bar is a plane perpendicular to the extending direction of the reinforcing steel bar, so that enough space is reserved, the plug-in unit and the precast pile cap body have enough spiral connection length, and the connection quality of the plug-in unit is ensured.
The sum of the length of the first external thread section of the anchoring steel bar and the length of the second external thread section of the insert is not more than the length of the connector. To reduce the amount of work required to thread the ends of the anchoring bar and the insert, the sum of the length of the first externally threaded section of the anchoring bar and the length of the second externally threaded section of the insert is typically made equal to or slightly less than the length of the connector.
The bent-up section of the anchoring steel bar can be bound and connected with the steel mesh sheets arranged in the prefabricated pile cap body to form an integral steel reinforcement framework of the prefabricated pile cap body, so that the connector and the steel mesh sheets are convenient to locate, and the prefabricated pile cap body is convenient to produce.
The thread forms of the inner thread of the connector, the first outer thread of the anchoring reinforcing steel bar, the second outer thread of the insert and the third outer thread of the connector are straight threads or inclined threads. The form of the thread can be selected according to engineering requirements or processing convenience, and the form can be diversified, particularly according to the requirement of meeting the connection performance.
As shown in fig. 14 to 18, the number of the plug-in units is the same as the number of the connecting holes of the pile top of the precast pile to be connected, the size and the specification of the plug-in units connected to the same precast pile cap body are the same, and after the plug-in units are connected to the precast pile cap body, the bottom end points of the plug-in units are all located on the same plane. The components arranged in the same prefabricated pile cap are suitable for being uniform in specification and size, and the quick-connection prefabricated pile cap for the composite foundation is convenient to manufacture; meanwhile, the quantity of the plug-in components connected with the bottom surface of the pile cap is the same as that of the connecting holes of the pile top of the precast pile to be connected, and the positions and the distribution of the plug-in components are also matched with the connecting holes of the pile top of the precast pile to be connected, so that the precast pile cap and the pile top of the precast pile can be conveniently and quickly connected.
Further, in order to facilitate lifting and installation, as shown in fig. 19, a lifting ring is disposed on the top surface of the precast pile cap body.
The hoisting ring can be fixed, namely, the hoisting ring is fixedly connected with an embedded part or an embedded rib thereof into an integral structure, and the hoisting ring protrudes above the top surface of the prefabricated pile cap body after molding.
The hoisting ring can also be arranged in a movable mode, namely the hoisting ring is not fixedly connected with an embedded part or an embedded rib of the hoisting ring, preferably, the hoisting ring can adopt a threaded connection mode, the embedded part of the hoisting ring comprises the embedded rib and a steel bar connecting sleeve, and the top surface of the steel bar connecting sleeve is flush with the top surface of the precast pile cap body. The embedded ribs are connected with the steel bar connecting sleeve through threads, after the prefabricated pile cap body is formed, a section of the bottom of the hanging ring provided with the external threaded rod is screwed into the steel bar connecting sleeve before being lifted, and the quick connection of the hanging ring is realized. When the prefabricated pile cap body is transported or stacked, the hanging ring can be unscrewed, so that the transportation and the stacking are facilitated. After the prefabricated pile cap body is installed on site, the hanging ring can be unscrewed, and recycling and repeated utilization are achieved. In order to prevent sundries from entering the steel bar connecting sleeve on the top surface of the prefabricated pile cap body, the threaded plug can be temporarily installed when the hoisting ring is not connected.
The embodiment is most suitable for the case that the cross section of the precast pile to be connected is circular or annular, including but not limited to various prestressed concrete pipe piles, special-shaped piles, rigid bodies, cast-in-place large-diameter pipe piles and solid column piles. In order to fully exert the effect of the soil arch and transmit more load to the pile body, the composite foundation pile caps are usually arranged according to a certain rule according to design requirements, and are mostly arranged in a square, rectangular or regular triangle manner. When the cross section of the precast pile to be connected is circular or annular, the position of the connecting hole of the pile top of the precast pile to be connected has uncertainty due to the fact that the position of the pile body is not normally specially adjusted when the pile is sunk into a foundation during construction, when the quick connection precast pile cap of the embodiment is adopted, the cross section of the pile cap is circular, the distribution of the connecting hole of the pile top after construction can be well matched, the plug-in unit is aligned and inserted into the connecting hole, the plug-in unit can be inserted into the connecting hole, connection is rapidly completed, the connection strength is high, the connection quality is reliable, and the pile cap is regularly distributed along with the arrangement of the plane position of the pile body all the time.
The embodiment is also suitable for the condition that the cross section of the precast pile to be connected is square, but the connecting line of the central lines of the pile top connecting holes is circular, including but not limited to various hollow square piles and solid square piles. The square pile can be according to the design position usually when the construction, makes the plane position of square pile have certain directionality, even there is certain deviation during the construction, when the prefabricated pile cap of a kind of high-speed joint of adopting this embodiment, pile cap cross section is circular, the distribution of the connecting hole of the matching pile bolck after the construction that can be fine, after aiming at the connecting hole with the plug-in components, accomplish the joint, the pile cap is the regularity along with arranging of the plane position of pile body all the time and distributes.
Example 2:
as shown in fig. 20 to 23, the quick-connecting precast pile cap for a composite foundation of the present invention includes a precast pile cap body having a square cross section, and a connector and an anchoring steel bar are provided in the precast pile cap body.
As shown in fig. 5, the connector is a hollow cylinder structure with internal threads, and the outer wall of the connector is a smooth circular surface.
As shown in fig. 20 to 23, the number of the connectors is several, and all the connectors of a single precast pile cap body are arranged in a square shape at the same horizontal position.
As shown in fig. 20 to 22, the bottom surface of the preformed pile cap body is a plane, and the bottom surfaces of the connectors are all located on the first bottom surface of the preformed pile cap body.
As shown in fig. 20 and 21, the connector is connected with an anchoring steel bar at one end inside the precast pile cap body.
As shown in fig. 6 to 7, the anchoring steel bar is a deformed steel bar, and a first external thread matched with the internal thread of the connector is arranged at one end of the anchoring steel bar connected with the connector; the state after the anchoring bar is screw-coupled to the connector is shown in fig. 8.
As shown in fig. 20, 21 and 6, the other end of the anchoring steel bar extends along the thickness direction of the precast pile cap body first, and then is bent up towards the side direction of the precast pile cap body;
as shown in fig. 24 to 27, the other end of the connector is spirally connected with a plurality of plug-ins;
as shown in fig. 9, the plug-in is of a rod-shaped structure, one end of the plug-in is provided with a second external thread matched with the internal thread of the connector, and the other end of the plug-in is provided with a concave part and a convex part which are concave and convex relative to the plug-in rod body;
in order to further optimize the quick-connection precast pile cap for the composite foundation, the embodiment comprises the following steps:
the most end part of the screw thread of the anchoring reinforcing steel bar is a plane vertical to the extending direction of the reinforcing steel bar.
The sum of the length of the first external thread section of the anchoring steel bar and the length of the second external thread section of the insert is not more than the length of the connector.
The thread forms of the inner thread of the connector, the first outer thread of the anchoring reinforcing steel bar, the second outer thread of the insert and the third outer thread of the connector are straight threads or inclined threads.
As shown in fig. 28 to 32, the number of the insert pieces is the same as the number of the connecting holes of the pile top of the precast pile to be connected, the size and the specification of the insert pieces connected with the same precast pile cap body are the same, and the bottom end points of the insert pieces are located on the same plane after the insert pieces are connected with the precast pile cap body.
In order to facilitate lifting and installation, the top surface of the precast pile cap body is provided with a lifting ring.
The embodiment is most suitable for the condition that the cross section of the precast pile to be connected is square and the connecting line of the central lines of the pile top connecting holes is square, including but not limited to various hollow square piles and solid square piles. When the prefabricated square pile is produced, the main reinforcements are arranged in a square mode, and therefore the corresponding pile top connecting holes are also arranged in a square mode. When the quick connection prefabricated pile cap is adopted, the cross section of the pile cap is square, the connector is arranged at the same horizontal plane position in a square mode, therefore, the distribution of connecting holes of the pile top after construction can be well matched, the plug-in units are aligned and inserted into the connecting holes, the connection is finished quickly in a plug-in mode, the connection strength is high, the connection quality is reliable, and the pile caps are distributed regularly along with the arrangement of the plane position of the pile body.
Example 3:
as shown in fig. 33 to 36, the quick-connect precast pile cap for a composite foundation according to the present invention includes a precast pile cap body having a square cross section, and a connector and an anchoring bar are provided in the precast pile cap body.
As shown in fig. 5, the connector is a hollow cylinder structure with internal threads, and the outer wall of the connector is a smooth circular surface.
As shown in fig. 33 to 36, the number of connectors is several, and all connectors of a single precast pile cap body are circularly arranged at the same horizontal position.
As shown in fig. 33 to 35, the bottom surface of the preformed pile cap body is a plane, and the bottom surfaces of the connectors are all located on the first bottom surface of the preformed pile cap body.
As shown in fig. 33 and 34, one end of the connector inside the precast pile cap body is connected with an anchoring steel bar;
as shown in fig. 6 to 7, the anchoring steel bar is a deformed steel bar, and a first external thread matched with the internal thread of the connector is arranged at one end of the anchoring steel bar connected with the connector; the state after the anchoring bar is screw-coupled to the connector is shown in fig. 8.
As shown in fig. 33, 34 and 6, the other end of the anchoring steel bar extends along the thickness direction of the precast pile cap body first, and then is bent up towards the side direction of the precast pile cap body;
as shown in fig. 37 to 40, the other end of the connector is spirally connected with a plurality of plug-ins;
as shown in fig. 9, the plug-in is of a rod-shaped structure, one end of the plug-in is provided with a second external thread matched with the internal thread of the connector, and the other end of the plug-in is provided with a concave part and a convex part which are concave and convex relative to the plug-in rod body;
in order to further optimize the quick-connection precast pile cap for the composite foundation, the embodiment of the invention comprises the following steps:
the most end part of the thread of the anchoring steel bar is a plane vertical to the extending direction of the steel bar.
The sum of the length of the first external thread section of the anchoring steel bar and the length of the second external thread section of the insert is not more than the length of the connector.
The thread forms of the inner thread of the connector, the first outer thread of the anchoring reinforcing steel bar, the second outer thread of the insert and the third outer thread of the connector are straight threads or inclined threads.
As shown in fig. 41 to 42, the number of the plug-in units is the same as the number of the connecting holes of the pile top of the precast pile to be connected, the size and the specification of the plug-in units connected to the same precast pile cap body are the same, and after the plug-in units are connected to the precast pile cap body, the bottom end points of the plug-in units are all located on the same plane.
In order to facilitate lifting and installation, the top surface of the precast pile cap body is provided with a lifting ring.
The embodiment is suitable for the condition that the cross section of the precast pile to be connected is circular or annular, including but not limited to various prestressed concrete pipe piles, special-shaped piles, rigid bodies, cast-in-place large-diameter pipe piles and solid column piles. When the cross section of the precast pile to be connected is circular or circular, the main ribs are generally arranged according to a circle, and therefore, the corresponding pile top connecting holes are also arranged in a circle. At the moment, a guide mark is required to be arranged at the pile top position, so that the position of the pile body is coordinated with the line type of the route when the pile is sunk into the foundation. When adopting the prefabricated pile cap of a kind of high-speed joint of this embodiment, the pile cap cross section is square, and the connector is circular and arranges in same horizontal plane position, and the distribution of the connecting hole of the pile bolck after the matching construction that can be fine is aimed at the connecting hole after with plug-in components, accomplishes the joint, and the pile cap is also corresponding and is regularly distributed along with arranging of the plane position of pile body.
As shown in fig. 43 and 44, this embodiment is also applicable to the case where the cross section of the precast pile to be connected is square, but the connecting line of the center lines of the pile top connecting holes is circular, including but not limited to various hollow square piles and solid square piles. When the square pile is constructed, the plane position of the square pile is enabled to have certain directivity generally according to the design position, even if certain deviation exists during construction, when the quick connection prefabricated pile cap of the embodiment is adopted, the distribution of the connecting holes of the pile top after construction can be well matched, plug-in components are aligned and inserted into the connecting holes, the plug-in components can be inserted and connected quickly, the connection strength is high, the connection quality is reliable, and the pile caps are regularly distributed along with the arrangement of the plane position of the pile body.
Example 4:
as shown in fig. 45 to 46, the quick-connect precast pile cap for a composite foundation according to the present invention includes a precast pile cap body having a circular cross section, and a connector and an anchoring bar are provided in the precast pile cap body.
As shown in fig. 47, the connector is a hollow cylinder structure provided with an internal thread, and the outer wall of the connector is provided with a thread.
As shown in fig. 45 to 46, the number of connectors is several, and all connectors of a single precast pile cap body are circularly arranged at the same horizontal position.
As shown in fig. 45 to 46, the bottom surface of the precast pile cap body is a plane containing the preformed hole, the bottom surfaces of the connectors are all located on the second bottom surface of the precast pile cap body, and the second bottom surface is the top surface of the preformed hole. The preformed hole is cylindrical, and the diameter of the preformed hole is preferably 2mm to 10mm larger than the outer diameter of the tubular pile so that the pile top can be conveniently inserted into the preformed hole.
As shown in fig. 44 to 45, the end of the connector inside the precast pile cap body is connected with an anchoring steel bar.
As shown in fig. 48, the anchoring steel bar is a deformed steel bar, and a first external thread matching the internal thread of the connector is arranged at one end of the anchoring steel bar connected with the connector; the state after the anchoring bar is screw-coupled to the connector is shown in fig. 49.
As shown in fig. 44 to 45, the other end of the anchoring bar extends along the thickness direction of the precast pile cap body, and is bent up towards the side direction of the precast pile cap body when the anchoring length does not meet the design requirement.
As shown in fig. 50 to 53, the other end of the connector is spirally connected with a plurality of inserts.
As shown in fig. 9, the plug-in unit is a rod-shaped structure, one end of the plug-in unit is provided with a second external thread matching with the internal thread of the connector, and the other end of the plug-in unit is provided with a concave part and a convex part which are concave and convex relative to the plug-in unit rod body.
In order to further optimize the quick-connection precast pile cap for the composite foundation, the embodiment of the invention comprises the following steps:
the most end part of the screw thread of the anchoring reinforcing steel bar is a plane vertical to the extending direction of the reinforcing steel bar.
The sum of the length of the first external thread section of the anchoring steel bar and the length of the second external thread section of the insert is not more than the length of the connector.
The thread forms of the inner thread of the connector, the first outer thread of the anchoring reinforcing steel bar, the second outer thread of the insert and the third outer thread of the connector are straight threads or inclined threads.
As shown in fig. 54 to 57, the number of the plug-in units is the same as that of the connecting holes of the pile top of the precast pile to be connected, the size and the specification of the plug-in units connected to the same precast pile cap body are the same, and the bottom end points of the plug-in units are located on the same plane after the plug-in units are connected to the precast pile cap body.
In order to facilitate lifting and installation, the top surface of the precast pile cap body is provided with a lifting ring.
In this embodiment, the bottom surface of prefabricated pile cap body has set up the preformed hole, and the specially adapted can regard as safe deposit to the very high condition of pile bolck and pile cap effect of being connected, can avoid pile cap edge pile bolck to take place to deflect or produce great horizontal displacement under the extreme condition such as plug-in components corrosion, fracture, its other advantages all are the same with aforementioned embodiment.
In addition to the above embodiments, in other embodiments, the cross section of the prefabricated pile cap body is circular or square, the connectors are arranged in circular or square or polygonal shapes, the outer wall of the connector is smooth or provided with threads, the bottom surface of the prefabricated pile cap body is a plane or a plane containing a reserved hole, the end of the anchoring steel bar is bent or not bent or provided with a hook, and the anchoring steel bar is a threaded steel bar or a smooth steel bar, which can be freely combined according to engineering requirements. When the end part of the anchoring reinforcing steel bar is not bent, the top of the anchoring reinforcing steel bar can be connected with the reinforcing steel bar mesh of the prefabricated pile cap body in a spot welding manner; when the end part of the anchoring reinforcing steel bar is provided with the hook, the hook hooks the reinforcing steel bar of the reinforcing steel bar net piece of the prefabricated pile cap body.
As shown in fig. 58-62, the cross-section of the preformed helmet body of example 4 can also be circular.
As shown in fig. 63 to 65, the ends of the anchoring bars may not be bent.
As shown in figures 66 to 67 of the drawings, the ends of the anchoring bars may be provided with hooks. When the hook is arranged, the hook can hook the reinforcing steel bars on the reinforcing steel bar net piece of the prefabricated pile cap body, so that the anchoring performance of the plug-in and the connector is improved, and the connection failure of the prefabricated pile cap caused by the fact that the embedded part is pulled out under special conditions is avoided.
In other embodiments, the anchoring bars, connectors, and inserts of the present invention may be combined. For example, the anchoring bar and connector may be made integrally, but still comprise an anchoring section and a connecting section, the connecting section being hollow and provided with internal threads, and the insert being threadably connectable to the structure. In addition, the anchoring steel bar, the connector and the plug-in can also be integrally manufactured, at the moment, the connector is omitted, after the prefabricated pile cap is manufactured, the plug-in is installed in place, and the plug-in can be directly connected with the pile top on site.
As shown in fig. 68 to 69, in other embodiments, in order to facilitate the connection between the insert and the connection hole of the pile top, at least two first marks are provided on the side surface of the pile cap, and the first marks are straight lines or grooves or ribs which vertically extend for a certain length; the vertical central line of any one of the first marks, the vertical central axis of one of the connectors on the bottom surface of the precast pile cap body and the vertical central axis of the precast pile cap body jointly exist on a vertical plane.
In other embodiments, the center point of the top surface of the pre-helmet body is provided with a second marking.
The invention relates to a connecting method of the embodiment of the quick connecting precast pile cap for a composite foundation, which comprises the following steps:
1) Hoisting the prefabricated pile cap body by using mechanical equipment, spirally connecting one end of the plug-in with a second external thread with a connector at the bottom of the prefabricated pile cap body, and enabling bottom end points of all the plug-in to be located on the same horizontal plane after the plug-in is connected with the prefabricated pile cap body;
2) Placing a clamping piece in a connecting hole at the top of the precast pile;
3) Leveling the precast pile cap body, and slowly moving the precast pile cap body to the position above the precast pile to be connected so that the position of the plug-in unit is accurately aligned to the position of the connecting hole at the top of the precast pile;
4) Slowly putting down the prefabricated pile cap body, enabling the plug-in piece to enter the connecting hole, and enabling the clamping piece to clamp the concave part of the plug-in piece to finish connection.
In order to further optimize the connecting method of the rapid connecting precast pile cap for the composite foundation, after the clamping piece is placed in the connecting hole at the top of the precast pile, epoxy resin can be poured in the connecting hole and the top surface of the precast pile. After the plug-in components are inserted into the connecting holes to complete connection, the epoxy resin is cured along with the lapse of time, so that the plug-in components and the clamping components can be protected, corrosion is prevented, the connection strength can be improved, and the connection clearance can be reduced.
After the quick-connection prefabricated pile cap for the composite foundation is connected with the prefabricated pile, a bearing structure consisting of a prefabricated pile cap body, an insert, a clamping piece and the prefabricated pile is formed, and when only axial vertical force is borne, load is directly transmitted to the prefabricated pile from the prefabricated pile cap body; when the vertical load is eccentric, and bears horizontal force or uplift force, the prefabricated pile cap body, the plug-in components, the clamping components and the prefabricated pile bear force together, and the load on the tension side is mainly transmitted to the plug-in components from the pile cap, then transmitted to the clamping components from the plug-in components and then transmitted to the prefabricated pile from the clamping components, so that the connection quality of the prefabricated pile cap and the prefabricated pile can be ensured, and the prefabricated pile cap is prevented from rotating or separating along the pile top.
In addition, because the diameter or side length of the precast pile for the composite foundation is generally 300mm to 500mm, the diameter or side length of the precast pile cap for the composite foundation is generally 1000mm to 1500mm, the size of the precast pile cap is obviously larger than the section of the precast pile, the pile top of the precast pile after the construction of the composite foundation is basically clung to the ground, when the precast pile cap is butted with the precast pile, the sight is shielded by the precast pile cap with the relatively larger upper size, and a site constructor cannot directly observe the butting condition of the inserting piece and the connecting hole, so that the center of the pile cap is difficult to align with the center of the precast pile, and the aligning of the inserting piece and the connecting hole is more difficult, the connecting method for quickly connecting the precast pile cap for the composite foundation can align the inserting piece with the connecting hole at the top of the pile according to the following steps:
(1) Preparation work
1) Arranging a first mark on the side surface of the precast pile cap body, wherein the first mark is a straight line or a groove or a convex rib which vertically extends for a certain length, and the number of the first mark is not less than two, and generally can be two;
2) And setting a second mark at the center point of the top surface of the precast pile cap body.
(2) In situ operation
1) Placing a plurality of laser verticals around the precast pile to be connected, and enabling the positions of the laser verticals to be located on an extension line of a connecting line of the center of the precast pile and the center of a pile top connecting hole, wherein the number of the laser verticals is not less than two;
2) Setting the height of a laser emitting point of a laser vertical instrument, so that the height of the laser emitting point is larger than the height of the top surface of the pile cap when the prefabricated pile cap body is installed;
3) Starting a laser vertical instrument to enable the laser vertical instrument to emit laser, wherein the laser forms a horizontal laser line at the pile top through the center of the precast pile and the center of the pile top connecting hole;
4) Starting other laser verticals, and repeating the step 3), wherein a plurality of horizontal laser lines are intersected at a first intersection point, and the first intersection point is the center of the top section of the precast pile;
5) Hoisting the prefabricated pile cap body connected with the plug-in by adopting mechanical equipment, and adjusting the top surface to be in a horizontal state;
6) Slowly and horizontally moving the prefabricated pile cap body to the position above the prefabricated pile, wherein the laser emitted by each laser vertical instrument forms a vertical laser line on the side surface of the prefabricated pile cap body and extends to the top surface of the prefabricated pile cap body, and a horizontal laser line is formed on the top surface of the prefabricated pile cap body; a plurality of horizontal laser lines on the top surface of the prefabricated pile cap are intersected at a second intersection point;
7) Accurately adjusting the horizontal position of the prefabricated pile cap body to enable a second mark at the center point of the top of the pile cap to coincide with a second intersection point;
8) Horizontally rotating the prefabricated pile cap body to enable the vertical laser line on the side face of the prefabricated pile cap body to be superposed with the second mark arranged on the side face, and then completing alignment of the plug-in unit and the connecting hole;
9) Slowly and vertically putting down the prefabricated pile cap body, accurately putting the plug-in into the connecting hole, the clamping piece clamps the concave part of the plug-in unit or the transition section of the concave part and the convex part, and the quick connection is completed.
In the present invention, features are not necessarily present in isolation, but are interleaved, unless explicitly specified or limited. The foregoing shows and describes the principles of the invention its main features and advantages are high effect. Those skilled in the art should appreciate that the present invention is not limited to the above-described embodiments, which are merely preferred examples of the present invention and are not intended to limit the present invention to the particular embodiments disclosed herein. The invention may be further modified and optimized within the spirit and scope of the appended claims, all changes that come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims (10)

1. A quick-connection prefabricated pile cap for a composite foundation is characterized by comprising a prefabricated pile cap body (1), wherein a connector (2) and anchoring steel bars (3) are arranged in the prefabricated pile cap body (1);
the connector (2) is of a hollow cylindrical structure provided with internal threads (21);
the number of the connectors (2) is multiple, and all the connectors (2) of a single prefabricated pile cap body (1) are arranged at the same horizontal position;
the bottom surfaces of the connectors (2) are all positioned on the bottom surface of the prefabricated pile cap body;
one end of the connector (2) positioned in the prefabricated pile cap body (1) is connected with an anchoring steel bar (3);
one end of the anchoring steel bar (3) connected with the connector (2) is provided with a first external thread (31) matched with the internal thread (21) of the connector (2);
the other end of the anchoring steel bar (3) extends along the thickness direction of the precast pile cap body (1), and when the anchoring length does not meet the design requirement, the anchoring steel bar is bent towards the side direction of the precast pile cap body (1);
the other end of the connector (2) is in threaded connection with a plurality of plug-in components (4);
the plug-in unit (4) is of a rod-shaped structure, one end of the plug-in unit (4) is provided with a second external thread (41) matched with the internal thread (21) of the connector (2), and the other end of the plug-in unit (4) is provided with an inwards concave part (42) and an outwards convex part (43).
2. A composite foundation rapid-connection precast pile cap according to claim 1, characterized in that the connectors (2) are arranged in a circle, square or polygon.
3. The fast connecting precast pile cap for composite foundation according to claim 1, characterized in that the outer wall of the connector (2) is smooth round or provided with a third external thread (22).
4. The rapid-connection precast pile cap for composite foundation according to claim 3, wherein the thread forms of the internal thread (21) of the connector (2), the first external thread (31) of the anchoring bar (3), the second external thread (41) of the insert (4), and the third external thread (22) of the connector (2) are straight threads or inclined threads.
5. The quick-connection precast pile cap for the composite foundation according to claim 1, wherein the anchoring bar (3) is a twisted bar or a plain round bar, and the most end part of the anchoring bar (3) having the first external thread (31) is a plane perpendicular to the extending direction of the bar of the first external thread (31).
6. A quick-connect precast pile cap for composite foundation according to claim 1, wherein the sum of the length of the first external thread (31) section of the anchoring reinforcement (3) and the length of the second external thread (41) section of the insert (4) is not more than the length of the connector (2).
7. The quick-connection precast pile cap for the composite foundation according to claim 1, characterized in that the number of the plug-in components (4) is the same as the number of the connection holes (5) of the pile top of the precast pile (a) to be connected, the size and the specification of the plug-in components (4) connected with the same precast pile cap body (1) are the same, and the bottom end points of the plug-in components (4) are located on the same plane after the plug-in components (4) are connected with the precast pile cap body (1).
8. The quick-connection precast pile cap for the composite foundation according to claim 1, wherein the top surface of the precast pile cap body (1) is provided with a hoisting ring (6), the side surface of the precast pile cap body (1) is provided with at least two first marks (7), the first marks (7) are straight lines or grooves or ribs extending vertically for a certain length, the vertical central line of any one of the first marks (7), the vertical central axis of a connector (2) nearest to any one of the first marks (7), and the vertical central axis of the precast pile cap body (1) both exist on a vertical plane, and the central point of the top surface of the precast pile cap body (1) is further provided with a second mark (8).
9. A method of connecting a quick connect precast pile cap for a composite foundation according to any one of claims 1 to 8, comprising the steps of:
1) Hoisting the prefabricated pile cap body (1) by using mechanical equipment, spirally connecting one end of the plug-in (4) with a second external thread (41) with the connector (2) at the bottom of the prefabricated pile cap body (1), and enabling the bottom end points of all the plug-in (4) to be located on the same horizontal plane after the plug-in (4) is connected with the prefabricated pile cap body (1);
2) A clamping piece is placed in a connecting hole (5) at the top of the precast pile (A);
3) Leveling the precast pile cap body (1), slowly moving to the position above the precast pile (A) to be connected, and aligning the position of the plug-in (4) to the position of the connecting hole (5) at the top of the precast pile (A);
4) Slowly and vertically putting down the prefabricated pile cap body (1), enabling the plug-in piece (4) to enter the connecting hole (5), and clamping the concave part of the plug-in piece (4) or the transition section of the concave part and the convex part by the clamping piece to finish connection.
10. The method for connecting a precast pile cap for a composite foundation according to claim 9, wherein after the fastener is placed in the connection hole (5) at the top of the precast pile, epoxy resin is poured into the connection hole (5) and the top surface of the precast pile (a).
CN202210761942.6A 2022-06-30 2022-06-30 Quick-connection prefabricated pile cap for composite foundation and connection method thereof Active CN115142402B (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1161847A (en) * 1997-08-12 1999-03-05 Eiji Suzuki Pile head reinforcing junction member
JP2009167597A (en) * 2008-01-10 2009-07-30 Okabe Co Ltd Connector of sc pile and joining structure
CN111636414A (en) * 2020-06-02 2020-09-08 齐鲁交通发展集团有限公司 Bearing type pervious concrete-ECC (error correction code) composite precast pile and preparation method thereof
CN113931168A (en) * 2021-10-19 2022-01-14 安徽省公路桥梁工程有限公司 Connecting structure of precast pile configured with glass fiber reinforcement and construction method of connecting structure
CN215888215U (en) * 2021-07-08 2022-02-22 宿迁学院 Precast pile connection structure and precast pile connecting assembly
CN216194672U (en) * 2021-10-15 2022-04-05 建华建材（中国）有限公司 Mixed reinforcement precast pile

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1161847A (en) * 1997-08-12 1999-03-05 Eiji Suzuki Pile head reinforcing junction member
JP2009167597A (en) * 2008-01-10 2009-07-30 Okabe Co Ltd Connector of sc pile and joining structure
CN111636414A (en) * 2020-06-02 2020-09-08 齐鲁交通发展集团有限公司 Bearing type pervious concrete-ECC (error correction code) composite precast pile and preparation method thereof
CN215888215U (en) * 2021-07-08 2022-02-22 宿迁学院 Precast pile connection structure and precast pile connecting assembly
CN216194672U (en) * 2021-10-15 2022-04-05 建华建材（中国）有限公司 Mixed reinforcement precast pile
CN113931168A (en) * 2021-10-19 2022-01-14 安徽省公路桥梁工程有限公司 Connecting structure of precast pile configured with glass fiber reinforcement and construction method of connecting structure

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