CN113216158A

CN113216158A - Reinforcing hoop device suitable for flexible reinforcement cage of cast-in-situ bored pile and use method

Info

Publication number: CN113216158A
Application number: CN202110399307.3A
Authority: CN
Inventors: 金威; 闫自海; 俞建强; 李华威; 李海涛; 甘鹏路
Original assignee: PowerChina Huadong Engineering Corp Ltd
Current assignee: PowerChina Huadong Engineering Corp Ltd
Priority date: 2021-04-14
Filing date: 2021-04-14
Publication date: 2021-08-06
Anticipated expiration: 2041-04-14
Also published as: CN113216158B

Abstract

The invention discloses a reinforcing hoop device suitable for a flexible reinforcement cage of a cast-in-situ bored pile and a using method thereof, and relates to the technical field of cast-in-situ bored pile construction in civil engineering, the device comprises an annular hoop, a plurality of fixing fasteners fixedly arranged on the inner side wall of the hoop at intervals in a surrounding manner, and connectors fixedly connected with the fixing fasteners in a one-to-one correspondence manner, wherein each connector comprises a sleeve and anchors which are symmetrically connected with the two ends of the sleeve and can move in the direction close to or far away from the sleeve through a connecting assembly, and each anchor is internally provided with a cavity and a plurality of anchoring wedges matched with the cavity; and the plurality of anchoring wedge blocks can be matched with the acting force of the lateral constraint force of the cavity by depending on the extruding thrust of the connecting component, and are close to the center to be tightly occluded with the steel strands of the telescopic reinforcement cage. The telescopic reinforcement cage has the advantages of reasonable structural design, no need of welding, good connection performance, good integrity of the reinforcement cage and capability of meeting the construction requirement of the telescopic reinforcement cage.

Description

Reinforcing hoop device suitable for flexible reinforcement cage of cast-in-situ bored pile and use method

Technical Field

The invention relates to the technical field of cast-in-situ bored pile construction in civil engineering, in particular to a reinforcing hoop device suitable for a flexible reinforcement cage of a cast-in-situ bored pile and a using method thereof.

Background

With the rapid development of national economy, high-rise buildings and bridge engineering are increasingly increased, and the application amount of pile foundations is increased. However, the traditional pile planting machine needs a flat ground surface, the pile frame of the pile planting machine occupies a large space and a large construction height, and when the cast-in-situ bored pile is constructed under certain specific conditions, namely under the limiting conditions of height limitation or low clearance and the like, such as in bridges, corridors, tunnels and the like, the complete reinforcement cage cannot be bound and hoisted into the hole due to the limited height outside the hole, and only the modes of binding in sections, hoisting in sections and welding in sections can be adopted. The method has low construction efficiency, consumes long time and has high labor cost and machine shift cost.

In order to solve the construction problem of the reinforcement cage under the limiting conditions of height limitation or low clearance and the like, the telescopic reinforcement cage is applied, but the connection between the telescopic reinforcement cages still continues to use the traditional welding mode, the integrity of the reinforcement cage which is welded section by section is poor, welding flux is consumed when the reinforcement cage is welded, labor cost is high, machine-to-work cost is high, and the like.

Based on the situation, the invention provides the reinforcement hoop device suitable for the flexible reinforcement cage of the cast-in-situ bored pile and the use method, and the problems can be effectively solved.

Disclosure of Invention

In order to solve the problems in the prior art, the invention aims to overcome the defects in the prior art and provide a connecting device which does not need welding, has good connecting performance and good reinforcement cage integrity and meets the conditions of a telescopic reinforcement cage and a using method thereof.

In order to solve the technical problems, the invention is realized by the following technical scheme:

in a first aspect, the invention provides a reinforcement hoop device suitable for a flexible reinforcement cage of a cast-in-situ bored pile, which comprises an annular hoop, a plurality of fixing fasteners fixedly arranged on the inner side wall of the hoop at intervals in a surrounding manner, and connectors fixedly connected with the fixing fasteners in a one-to-one correspondence manner, wherein each connector comprises a sleeve and anchors which are symmetrically connected to two ends of the sleeve and can move in a direction close to or far away from the sleeve through a connecting assembly, and each anchor is internally provided with a cavity and a plurality of anchor wedges matched with the cavity; and the plurality of anchoring wedge blocks can be matched with the acting force of the lateral constraint force of the cavity by depending on the extruding thrust of the connecting component, and are close to the center to be tightly occluded with the steel strands of the telescopic reinforcement cage.

As a preferable technical scheme of the invention, the cavity is formed by connecting a first circular truncated cone-shaped cavity and a second cylindrical cavity, a first internal thread is arranged in the second cavity, and the first internal thread is matched with an external thread arranged on the connecting component.

In a preferred embodiment of the present invention, the first cavity has a first insection therein, and correspondingly, the outer surface of the portion of each anchor wedge in contact with the first cavity has a second insection matching the first insection.

In a preferred embodiment of the invention, the engaging portion of the inner surface of each anchor wedge has ground teeth.

As a preferable technical scheme of the invention, the connector further comprises a sheath sleeved outside the anchor and the sleeve.

As a preferable technical scheme of the invention, the sheath consists of a cylinder body and a cylinder cap.

As a preferable technical scheme of the invention, the diameter of the sleeve is smaller than that of the anchor, so that the sleeve is in a dumbbell shape after being connected; correspondingly, the whole sheath is also dumbbell-shaped, a groove is formed in the middle of the sheath, and the groove is matched with the hoop of the fixing fastener.

In a preferred embodiment of the present invention, the sleeve includes symmetrically arranged female sleeve units, the two sleeve units are fastened and connected by a first rivet, and a second internal thread matching with the external thread provided on the connecting assembly is provided in the female surface of each sleeve unit.

In a preferred embodiment of the present invention, the fixing fastener is composed of at least a hoop into which the connector is inserted and a bolt for locking the hoop, and the fixing fastener and the hoop are fastened and connected by inserting a second rivet into openings pre-formed in the hoop and the hoop.

As a preferred technical solution of the present invention, the connecting member is shaped as a hollow cylinder, the inside is a cavity, and the outer surface is an external thread which is respectively matched with the first internal thread of the cavity and the second internal thread of the sleeve.

In a second aspect, the invention provides a method for using a reinforcing hoop device suitable for a flexible reinforcement cage of a cast-in-situ bored pile, wherein the hoop, a fixing fastener and parts of a connector are prefabricated in a factory and transported to a construction site; the using method comprises the following steps:

step 1: aligning the opening on the hoop with the opening on the fixing fastener, and connecting by using a second rivet;

step 2: sequentially assembling a plurality of fixed fasteners on the hoop according to the method in the step 1;

and step 3: placing the connector in a hoop of a fixed fastener, enabling a groove of the connector to correspond to the hoop of the fixed fastener, and locking the groove by using a bolt on one side;

and 4, step 4: assembling a plurality of connectors on the hoop in sequence according to the method in the step 3;

and 5: after the three parts of the connecting device are assembled, connecting the steel strand of the lower telescopic reinforcement cage with the lower anchor of the connector;

step 6: after the steel strands of the lower telescopic reinforcement cage are connected, the steel strands of the upper telescopic reinforcement cage are connected with the upper anchor of the connector on the hoop;

and 7: after the connection is finished, the upper and lower telescopic reinforcement cages are completely unfolded, the connector is in a vertical state, and the upper and lower telescopic reinforcement cages form a whole through the whole device.

Compared with the prior art, the invention has the following advantages and beneficial effects:

the invention solves the problem of connection of the telescopic reinforcement cages, and can realize better integrity between the reinforcement cages;

the steel hoop of the steel reinforcement cage can restrain the deformation of the steel strand and plays a role in installing the connector;

the connector fixing device can realize the in-plane rotation of the connector through the rivet, and can meet the connection of steel strands under the condition of a telescopic reinforcement cage;

the steel strand is connected by the connector, so that the mechanical property of the steel strand connection part is better, and the integrity of the steel reinforcement cage is better;

the steel strand wires are connected by the connectors, so that the traditional welding mode is avoided, and the labor cost and the platform shift cost are reduced;

the connector is integrally dumbbell-shaped, and the groove in the middle of the dumbbell is used for sleeving the hoop of the fixing fastener, so that the connector cannot generate in-plane displacement relative to the reinforcement cage;

the connector is sleeved with the sheath, so that no slurry enters the integral structure of the connector in the construction process, and the connection position is ensured to have better connection performance;

the interlocking effect of the anchoring wedge block and the steel strand and the matched insection between the anchor and the anchoring wedge block effectively increase the strength of the connection of the steel strand.

Drawings

Fig. 1 is a schematic structural overall top view of a reinforcement hoop device suitable for a flexible reinforcement cage of a cast-in-situ bored pile according to an embodiment of the present invention.

Fig. 2 is a partial schematic structural view of a reinforcement hoop device suitable for a flexible reinforcement cage of a cast-in-situ bored pile according to an embodiment of the present invention.

FIG. 3 is a schematic view of a ferrule according to an embodiment of the present invention.

Fig. 4 is a schematic structural view of a fixing fastener according to an embodiment of the invention.

Fig. 5 is a schematic cross-sectional view of a connector according to an embodiment of the invention.

Fig. 6 is a schematic cross-sectional view of a sleeve according to an embodiment of the present invention.

Reference numerals: 1-a cuff; 2-fixing the fastener; 3-a connector; 11-opening a hole; 21-a second rivet; 22-a hoop; 23-a bolt; 31-a sleeve; 32-a connecting assembly; 33-an anchor; 34-anchoring wedges; 35-a sheath; 36-a groove; 37-a first rivet; 311-second internal thread; 321-external threads; 331-a first cavity; 332-a second cavity; 341-second insections; 342-grinding teeth; 351-cylinder body; 352-cartridge cap; 3311-first insection; 3321-first internal thread.

Detailed Description

In order that those skilled in the art will better understand the technical solutions of the present invention, the following description of the preferred embodiments of the present invention is provided in conjunction with specific examples, but it should be understood that the drawings are for illustrative purposes only and should not be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.

The present invention will be further described with reference to the following examples and figures 1-5, but the invention is not limited thereto.

The embodiment provides a reinforcement hoop device suitable for a flexible reinforcement cage of a cast-in-situ bored pile, which comprises a hoop 1 arranged between telescopic reinforcement cages, a fixing fastener 2 fixed on the hoop 1 and a connector 3 fixedly connected with the fixing fastener 2.

As shown in fig. 1 and 2, a plurality of fixing fasteners 2 are fixedly arranged on the inner side wall of the hoop 1 at intervals in the circumferential direction, and connectors 3 are fixedly connected in the fixing fasteners 2 in a one-to-one correspondence manner. Wherein, the material of cuff 1 is the steel ring, and the steel that rigidity intensity is great is chooseed for use to the steel ring material, plays the effect that restraint steel reinforcement cage warp to a certain extent.

Further, as shown in fig. 3, the connector 3 is composed of a hoop 22 into which the connector 3 is inserted and a bolt 23 for locking the hoop 22, and the hoop 22 is opened with an opening 11 at the end away from the bolt 23; as shown in fig. 4, a plurality of openings 11 are circumferentially spaced on the inner side wall of the ferrule 1, and the openings 11 are matched with the openings 11 on the hoop 22; the hoop 1 and the fixed fastener 2 can be tightly connected together by inserting the second rivet 21 into the opening 11 preset on the hoop 22 and the hoop 1; the hoop 22 can be rotated in the plane by the second rivet 21 without being displaced in the plane; can be locked by the bolt 23 on one side and plays a role of fixing the connector 3.

As shown in fig. 5, the connector 3 includes a sleeve 31 and anchors 33 symmetrically screwed to both ends of the sleeve 31 and movable in a direction toward or away from the sleeve 31 by a connecting assembly 32, each anchor 33 having a cavity therein and a plurality of anchor wedges 34 fitted to the cavity; the anchoring wedges 34 can be matched by the extrusion force of the connecting component 32 and the acting force of the lateral restraining force of the cavity, and are drawn close to the center to be tightly engaged with the steel strands of the telescopic reinforcement cage.

Further, the cavity is formed by joining a truncated cone-shaped first cavity 331 and a cylindrical second cavity 332, and a first internal thread 3321 is formed inside the second cavity 332, and the first internal thread 3321 is matched with the external thread 321 arranged on the connecting component 32. The first cavity 331 has a first profile 3311 inside, and correspondingly the outer surface of the portion of each anchor wedge 34 in contact with the first cavity 331 has a second profile 341 matching the first profile 3311.

Further, the biting portion of the inner surface of each anchor wedge 34 has ground teeth 342.

Further, the connector 3 further comprises a sheath 35 sleeved outside the anchor 33 and the sleeve 31, the sheath 35 is composed of a cylinder 351 and a cylinder cap 352, the cylinder cap 352 is arranged at one end, connected with the steel strand, of the upper connecting assembly 32 and the lower connecting assembly 32, mud can be prevented from entering the joint of the overall structure of the connector 3 during construction, the assembling stability of the joint is guaranteed, and the overall performance of the reinforcement cage is guaranteed.

Further, the connecting member 32 is shaped as a hollow cylinder, and has a hollow interior and an external surface with an external thread 321, wherein the external thread 321 is respectively matched with the first internal thread 3321 of the hollow interior and the second internal thread 311 of the sleeve 31.

As shown in fig. 5, the sleeve 31 has a diameter smaller than that of the anchor 33, so that the sleeve is dumbbell-shaped as a whole after being connected; accordingly, the sheath 35 is also dumbbell-shaped, and a groove 36 is formed in the middle, and the groove 36 is matched with the hoop 22 of the fastening device 2. As shown in fig. 6, the sleeve 31 comprises symmetrically arranged female sleeve 31 units, two sleeve 31 units are fastened and connected by a first rivet 37, and each sleeve 31 unit has a second internal thread 311 in the concave surface thereof, which is matched with an external thread 321 provided on the connecting assembly 32.

Further, the sleeve 31 is used for connecting the connecting component 32 of the upper and lower parts, the threaded connection of the sleeve 31 and the connecting component 32, the threaded connection of the connecting component 32 and the anchor 33, the insection engagement between the anchor 33 and the anchoring wedge 34, the supporting force of the connecting component 32 on the anchoring wedge 34, and the engagement force between the anchoring wedge 34 and the steel strand tightly form a whole.

The connecting assembly 32 is screwed in or out by screwing the anchor 33, thereby controlling the anchoring wedge 34, the length of the connecting assembly 32 in the anchor 33 representing the constraint of the anchoring wedge 34 in the anchor 33, and tightening the anchor 33 ensures that the anchoring wedge 34 imparts the maximum restraining force to the steel strand.

In the work progress, the steel strand wires of the scalable steel reinforcement cage on upper portion are connected with the upper portion anchor 33 of connector 3 on the cuff 1, and the steel strand wires of the scalable steel reinforcement cage of lower part are connected with the lower part anchor 33 of connector 3, and fixed buckle spare 2 not only plays the effect of fixed connector 3 position, can allow steel strand wires connector 3 to rotate in the plane in addition, and when steel strand wires connector 3 was vertical state, the steel strand wires of scalable steel reinforcement cage were the state of expandeing completely. Compared with other devices, the steel strand connector 3 is divided into an upper part and a lower part, so that the steel strands are connected, and due to the existence of the hoop 1, the steel strand cages at the compression positions are more tidy, and the compressed steel strand cages are connected together more favorably.

The specific construction method comprises the following steps:

(1) manufacturing the parts of the steel hoop 1, the steel fixing fastener 2 and the connector 3 in a factory in a customized manner; wherein, the diameter of the ferrule 1 and the plurality of openings 11 need to be determined according to actual conditions;

(2) transporting all components to a job site;

(3) aligning the opening 11 of the hoop 1 with the opening of the fixing fastener 2, and connecting by using a second rivet 21;

(4) sequentially assembling a plurality of fixing fasteners 2 on the steel ferrule 1 according to the method;

(5) placing the connector 3 in the hoop 22 of the fastening clip 2;

(6) the groove 36 of the connector 3 is corresponding to the hoop 22 of the fixed fastener 2 and is locked by the bolt 23 on one side;

(7) assembling a plurality of connectors 3 to the ferrule 1 in sequence in the above-described manner;

(8) after the three parts of the connecting device are assembled, connecting the steel strand of the lower telescopic reinforcement cage with the lower anchor 33 of the connector 3;

(9) after the steel strands of the lower telescopic reinforcement cage are connected, the steel strands of the upper telescopic reinforcement cage are connected with the upper anchor 33 of the connector 3 on the hoop 1;

(10) after the connection is finished, the upper and lower telescopic reinforcement cages are completely unfolded, the connector 3 is in a vertical state, and the upper and lower telescopic reinforcement cages form a whole through the whole device.

According to the description and the drawings, a person skilled in the art can easily manufacture or use the reinforcement hoop device suitable for the flexible reinforcement cage of the cast-in-situ bored pile, and can produce the positive effects recorded in the invention.

Unless otherwise specified, in the present invention, if there is an orientation or positional relationship indicated by terms of "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, rather than to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, the terms describing orientation or positional relationship in the present invention are for illustrative purposes only, and should not be construed as limiting the present patent, specific meanings of the above terms can be understood by those of ordinary skill in the art in light of the specific circumstances in conjunction with the accompanying drawings. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Unless expressly stated or limited otherwise, the terms "disposed," "connected," and "connected" are used broadly and encompass, for example, being fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiments according to the technical spirit of the present invention are included in the scope of the present invention.

Claims

1. The utility model provides a strengthen hoop device suitable for flexible steel reinforcement cage of bored concrete pile which characterized in that: the connector comprises an annular hoop (1), a plurality of fixing fasteners (2) fixedly arranged on the inner side wall of the hoop (1) at intervals in a surrounding manner, and connectors (3) fixedly connected with the fixing fasteners (2) in a one-to-one correspondence manner, wherein each connector (3) comprises a sleeve (31) and anchors (33) which are symmetrically connected to two ends of the sleeve (31) and can move in a direction close to or far away from the sleeve (31) through connecting components (32), and each anchor (33) is internally provided with a cavity and a plurality of anchor wedges (34) matched with the cavity; and the plurality of anchoring wedges (34) can be matched with the acting force of the lateral constraint force of the cavity by depending on the extrusion thrust of the connecting component (32), and are close to the center to be tightly meshed with the steel strands of the telescopic reinforcement cage.

2. The reinforcement hoop device suitable for the flexible reinforcement cage of the cast-in-situ bored pile according to claim 1, wherein: the cavity is formed by connecting a first round table-shaped cavity (331) and a second cylindrical cavity (332), a first internal thread (3321) is arranged in the second cavity (332), and the first internal thread (3321) is matched with an external thread (321) arranged on the connecting component (32).

3. The reinforcement hoop device suitable for the flexible reinforcement cage of the cast-in-situ bored pile according to claim 2, wherein: the first cavity (331) has a first insection (3311) inside, and correspondingly the outer surface of the portion of each anchor wedge (34) in contact with the first cavity (331) has a second insection (341) matching the first insection (3311).

4. The reinforcement hoop device suitable for the flexible reinforcement cage of the cast-in-situ bored pile according to claim 1, wherein: the biting portion of the inner surface of each anchor wedge (34) has ground teeth (342).

5. The reinforcement hoop device suitable for the flexible reinforcement cage of the cast-in-situ bored pile according to claim 1, wherein: the connector (3) further comprises a sheath (35) sleeved outside the anchor (33) and the sleeve (31), and the sheath (35) consists of a cylinder body (351) and a cylinder cap (352).

6. The reinforcement hoop device suitable for the flexible reinforcement cage of the cast-in-situ bored pile according to claim 5, wherein: the diameter of the sleeve (31) is smaller than that of the anchor (33), so that the sleeve is in a dumbbell shape after being connected; correspondingly, the whole sheath (35) is also dumbbell-shaped, a groove (36) is formed in the middle, and the groove (36) is matched with the hoop (22) of the fixing fastener (2).

7. The reinforcement hoop device suitable for the flexible reinforcement cage of the cast-in-situ bored pile according to claim 1, wherein: the sleeve (31) comprises symmetrically arranged female sleeve (31) units, the two sleeve (31) units are fixedly connected through a first rivet (37), and a second internal thread (311) matched with an external thread (321) arranged on the connecting component (32) is arranged in the concave surface of each sleeve (31) unit.

8. The reinforcement hoop device suitable for the flexible reinforcement cage of the cast-in-situ bored pile according to claim 1, wherein: the fixing fastener (2) at least comprises a hoop (22) for embedding the connector (3) and a bolt (23) for locking the hoop (22), and the fixing fastener (2) and the hoop (1) are embedded into open holes (11) which are pre-arranged on the hoop (22) and the hoop (1) through a second rivet (21) to be fastened and connected.

9. The reinforcement hoop device suitable for the flexible reinforcement cage of the cast-in-situ bored pile according to claim 1, wherein: the connecting component (32) is in the shape of a hollow cylinder, the inside of the connecting component is a cavity, the outer surface of the connecting component is an external thread (321), and the external thread (321) is matched with the first internal thread (3321) of the cavity and the second internal thread (311) of the sleeve (31) respectively.

10. A method of using a reinforcement collar device for a flexible reinforcement cage of a bored pile, characterized in that the collar (1), the fixing clip (2) and the parts of the connector (3) according to any one of claims 1 to 9 are prefabricated in a factory and transported to a construction site; the using method comprises the following steps:

step 1: aligning the opening (11) on the hoop (1) with the opening on the fixing fastener (2) and connecting by using a second rivet (21);

step 2: sequentially assembling a plurality of fixing fasteners (2) on the hoop (1) according to the method in the step 1;

and step 3: placing the connector (3) in a hoop (22) of a fixed fastener (2), enabling a groove (36) of the connector (3) to correspond to the hoop (22) of the fixed fastener (2), and locking by using a bolt (23) on one side;

and 4, step 4: assembling a plurality of connectors (3) on the ferrule (1) in sequence according to the method of the step 3;

and 5: after the three parts of the connecting device are assembled, connecting the steel strand of the lower telescopic reinforcement cage with the lower anchor (33) of the connector (3);

step 6: after the steel strands of the lower telescopic reinforcement cage are connected, the steel strands of the upper telescopic reinforcement cage are connected with the upper anchor (33) of the connector (3) on the hoop (1);

and 7: after the connection is finished, the connector (3) is in a vertical state after the upper and lower telescopic reinforcement cages are completely unfolded, and the upper and lower telescopic reinforcement cages form a whole through the whole device.