CN111719709B

CN111719709B - Connecting structure between prefabricated reinforced concrete structures and reinforcing steel bar configuration method for reinforced concrete structures

Info

Publication number: CN111719709B
Application number: CN201910672802.XA
Authority: CN
Inventors: 梁惠文
Original assignee: Bama Dana Construction And Engineering Co ltd
Current assignee: Bama Dana Construction And Engineering Co ltd
Priority date: 2019-03-21
Filing date: 2019-07-24
Publication date: 2022-04-05
Anticipated expiration: 2039-07-24
Also published as: CN111719707A; CN211572006U; CN111719709A; SG11201913639UA; CN211572000U; SG11201913640UA

Abstract

The present invention provides a connection structure between prefabricated reinforced concrete structures, which includes a first prefabricated reinforced concrete structure selected from the group consisting of walls, assemblies, columns, beams, floors or decks. The structure comprises one or more first reinforced concrete connectors embedded along a side surface part of the first prefabricated reinforced concrete structure, at least one first reinforced concrete connector extends outwards from the side surface of the first prefabricated reinforced concrete structure alternately to form a convex part, so that each first reinforced concrete connector forms a periodic convex structure, and each convex part and the side surface of the first prefabricated reinforced concrete structure form a hollow hole which is used for receiving a connecting element. A second precast concrete structure is provided beside the first precast concrete structure and has a similar setting. A rotatable screw-type connecting element is combined with the hole of the first steel bar connecting piece and the hole of the second steel bar connecting piece in a staggered mode, and then connection is completed through grouting, so that a template on site is omitted.

Description

Connecting structure between prefabricated reinforced concrete structures and reinforcing steel bar configuration method for reinforced concrete structures

Technical Field

The present invention relates to a technique for providing various connecting concrete structures, and more particularly to a connecting technique for quickly assembling various prefabricated or precast elements at a construction site.

Background

In a conventional reinforced concrete structural wall, a column structure includes longitudinal steel bars (e.g., metal steel bars) and open-type (open) ties and closed-type (close) stirrups (tie), which are arranged perpendicular to the longitudinal steel bars at a distance from each other to form a column. The main purpose of the stirrups and the tie bars is to transversely restrain the longitudinal steel bars. The columnar structure of the common stirrup is a cube or a cuboid.

For a round stirrup column, the closed form stirrup is a round shape. Another alternative to a circular closed stirrup is a continuous helical thread of steel. For round stirrup columns, many studies and literature have shown that using continuous helically threaded rebar has higher strength and ductility than using round closed stirrups.

For the wall body of reinforced concrete, the longitudinal steel bars are mostly restricted by using tie bars and closed stirrups, and spiral steel bar stirrups are not used as restricting or connecting prefabricated parts. Conventional prefabricated reinforced concrete structures employ a rebar design similar to cast-in-place concrete structures, with the longitudinal rebar surrounded by tie bars and closed stirrups.

For practical applications of joining two upright prefabricated elements, conventional connection details include:

1. the end parts of the prefabricated wall surfaces are distributed with exposed stirrups;

2. adding steel bars to the construction field and anchoring the steel bars in the stirrups so as to transfer internal force between the prefabricated parts;

3. manufacturing a site template plug;

4. and (4) pouring concrete or grouting.

The disadvantage of the above system is the need to build templates and set steel bars on site, which slows down the construction time. Therefore, it is necessary to improve the conventional concrete joining structure technology, and particularly, an improvement technology which can increase the construction speed by eliminating the need for building forms on site in the construction of a building is required.

Disclosure of Invention

The present invention provides a connection structure for prefabricated reinforced concrete structures, which includes a first prefabricated reinforced concrete structure selected from the group consisting of walls, prefabricated components, columns, beams, floors, and balconies. The connecting structure includes one or more first reinforcing bar connectors embedded along a side portion of the first prefabricated reinforced concrete structure, the first reinforcing bar connectors extending outward from the side of the first prefabricated reinforced concrete structure, periodically forming protrusions, each of the protrusions forming a hollow with the side of the first prefabricated reinforced concrete structure, the hollow for receiving a connecting element. A second precast concrete structure having a similar setting is provided beside the first precast concrete structure. A rotatable spiral connecting element is combined with the cavity of the first steel bar connecting piece and the cavity of the second steel bar connecting piece in a staggered mode, and then connection is completed through filling grout, so that a template on site is omitted.

In one embodiment, the one or more first rebar connectors and the one or more first rebar connectors are substantially of a helical configuration, wherein each of the helically configured rebar connectors may include one or more rebar coupled thereto.

In one embodiment, the connecting structure further comprises a cast-in-place concrete or is grouted into a space between the first prefabricated reinforced concrete structure and the second prefabricated reinforced concrete structure.

In one embodiment, the one or more first and second reinforcing bar couplers are a continuous W-shape, wherein each of the W-shaped reinforcing bar couplers may include one or more reinforcing bars coupled to the coupler.

In an embodiment, the one or more first and second rebar connectors each include a plurality of sinusoidal or other periodic projections, wherein each of the plurality of sinusoidal or other periodic projections may include one or more rebar bonded to the connector.

In one embodiment, the pitch of the helical connecting element is approximately equal to or equal to the distance between adjacent voids.

In one embodiment, the connecting structure further comprises:

at least a third prefabricated reinforced concrete structure selected from the group consisting of walls, assemblies, columns, beams, floors or counter-tops, said third prefabricated reinforced concrete structure comprising:

one or more third steel bar connecting pieces are designed to be partially embedded along the side surface of the third prefabricated reinforced concrete structure body, the third steel bar connecting pieces partially protrude out of the periodic protruding structural surface, and each outward protruding part and the side surface of the third prefabricated reinforced concrete structure body form a plurality of hollow holes which are used for receiving a connecting element; and

and the rotatable spiral connecting element is combined with the hole of the first steel bar connecting piece, the hole of the second steel bar connecting piece and the hole of the third steel bar connecting piece in a staggered manner.

A second aspect of the present invention provides a rebar placement method for a prefabricated reinforced concrete structure, comprising welding one or more longitudinal rebars to the outer or inner periphery of one or more rebar spirals to form a rebar spiral assembly for placement within a structural wall, floor or other structure.

A third aspect of the present invention provides a connection structure between prefabricated reinforced concrete structures, comprising:

a first prefabricated reinforced concrete structure selected from a wall, component, column, beam, floor or counter top structure using reinforcing arranged by the method of the second aspect of the invention;

a second prefabricated reinforced concrete structure selected from a wall, component, column, beam, floor or counter top structure using the reinforcing steel deployed by the method of the second aspect of the invention;

the spiral steel bar assembly is placed in a first prefabricated reinforced concrete structure body, the spiral steel bar assembly placed in the first prefabricated reinforced concrete structure body is rotated into the spiral steel bar assembly placed in a second prefabricated reinforced concrete structure body after being hoisted, and a spiral connecting assembly is overlapped with the spiral steel bar assemblies in the first prefabricated reinforced concrete structure body and the second prefabricated reinforced concrete structure body.

In one embodiment, the longitudinal rebars are welded or otherwise attached to the periphery of the one or more rebars.

In another embodiment, the longitudinal rebars are welded or otherwise attached to the inner periphery of the one or more rebars.

In the above embodiment, if a plurality of reinforcing steel spirals are used, all the centers of the circles overlap and the pitch is the same as the diameter.

In one embodiment, the diameter of the rebar spiral connector assembly is smaller than the diameter of the rebar spiral assemblies of the first and second precast reinforced concrete structures, but the pitch of the rebar spiral connector assembly is the same, so that the connector assembly can move rotationally within the rebar spiral assemblies.

In one embodiment, the longitudinal and helical reinforcement bars may be replaced by strips of suitable structural material such as other metals or carbon fiber.

Drawings

FIG. 1A is a top view of a connection structure in one embodiment of the present invention;

FIG. 1B is a perspective view of a connection structure in one embodiment of the present invention;

FIG. 1C is an enlarged view of the pitch and radius of the rebar of the present invention; the right part is a schematic side view of the connection structure in an embodiment of the present invention;

FIG. 2 is a top view (upper left, lower left, and lower right) and a cut-away view (upper right) of a connection structure in various embodiments of the present invention;

the upper part of fig. 3A shows a plan view of the reinforcing wall connected by the spiral reinforcement combination; the left lower part is a perspective view showing the spiral steel bar combination used for connecting the prefabricated wall surface; the lower right part shows a cross section view of a prefabricated wall surface connected by the spiral steel bar combination of the invention;

FIG. 3B is a side view of the single-helix rebar connector shown from above; the lower part shows a side view and a three-dimensional view of the double-helix steel bar connecting piece;

the upper portion of fig. 3C is a top view of the main rebars and connecting rebars in one embodiment of the present invention; the lower part shows the starting and final positions when the wall body is connected by the spiral steel bar combination;

the upper part of fig. 4 shows the starting and ending positions of the coupling rebars in the prefabricated panels when two prefabricated panels are coupled in accordance with an embodiment of the present invention; the lower part shows a plan view of a group of prefabricated panels connected by connecting spiral steel bars;

fig. 5 shows the insertion of spiral reinforcing bars in a rotating action from the top between the W-shaped reinforcing bars of two wall surfaces by another embodiment of the present invention;

FIG. 6 is an isometric view of the two wall surfaces of FIG. 5 with the rebar inserted therein;

FIG. 7 is a top or cross-sectional view of the two wall surfaces of FIG. 5 with the reinforcing steel spiral inserted therein;

FIG. 8 is an enlarged view of the two wall surfaces of FIG. 5 with the reinforcing steel spirals inserted therein;

FIG. 9 is a top or cross-sectional view of four wall sections connected by the embodiment shown in FIG. 5;

FIG. 10 illustrates an embodiment of the present invention in which three rebars of the invention are used to join two prefabricated walls;

FIG. 11 is an enlarged view of the pitch and radius of the rebar of the embodiment of FIG. 10;

FIG. 12 shows the embodiment of FIG. 10 with three rebar presenting a staggered pattern;

fig. 13 shows an embodiment of connecting four prefabricated walls with five inventive rebar spirals.

Detailed Description

Fig. 1A, 1B and 1C are schematic views illustrating the connection of two prefabricated wall surfaces. FIG. 1A is a top view of prefabricated wall surfaces A and B: fig. 1B is a perspective view of prefabricated wall surfaces a and B. The two prefabricated wall surfaces can be independent prefabricated wall plates (panels) or side wall surfaces of two adjacent prefabricated structure modules, or other prefabricated structures such as components, columns, beams, floors or tables and the like. And the spiral steel

bar connecting pieces

1 and 2 are respectively poured at one ends of the two precast concrete structures and have the same height with the precast concrete structures. Drawn in a spiral shape, one skilled in the art will appreciate that any connector having a periodic repeating pattern may be suitable, such as a W-shape or a sinusoidal shape. The spiral reinforcing steel bar connecting piece or other connecting pieces in continuous transmission types extend from the prefabricated wall surface, and a continuous cavity is formed at one side of the concrete structure body. The geometry of the helix is defined by its diameter, pitch and direction of rotation.

As shown in fig. 1A, portions of the screw-type reinforcing

bar couplers

1 and 2 are exposed to ends of two prefabricated wall surfaces 6. If the structure requires strength, longitudinal reinforcing bars 7, such as reinforcing bars (rebars), may be provided in the screw-type reinforcing

bar couplers

1,2, but this is not absolutely necessary. In a construction site, the end parts of the two prefabricated wall surfaces A and B are arranged corresponding to each other, the design pattern of the end parts corresponds to the requirement of connecting the two, and a gap of about 20 mm at an interval 3 is formed on the outer surface between the end parts. A space 5 is formed between the ends of the two prefabricated wall surfaces, and the size of the space corresponds to the size of the third spiral connecting piece 4 required by insertion from the upper part of the end of the prefabricated wall surface. The diameter of the third spiral connecting piece 4 is selectively smaller than that of the spiral reinforcing steel

bar connecting pieces

1 and 2 which are partially poured (cast) on the prefabricated wall surfaces, so that the third spiral connecting piece 4 can be inserted into the space between the two prefabricated wall surfaces.

The screw coupler 4 has the same rotation direction and the same pitch as the screw-type reinforcing bar couplers 1,2 (however, the screw-type reinforcing

bar couplers

1,2 may have a larger pitch so that there may be a larger pitch as they are screw-coupled to each other). It is noted that any screw type screw connector 4 that can be screwed into the screw type reinforcing

bar connecting members

1,2 may be applied. The attribute style of the spiral can be selected according to the rotation direction and the pitch as long as the spiral connector 4 can be inserted into the hole by rotating downwards without obstructing other steel bars.

The space 3 between the two prefabricated walls can be sealed by caulking strips or other means, and the space 5 can be filled with concrete or grout to complete the connection of the structures. It is worth noting that the method does not involve template operation, and the construction speed can be accelerated.

The connection shown in figure 1 is also suitable for connecting prefabricated reinforced concrete structures that meet at an angle. Further, the connection of fig. 1 may also be applied to the connection of more than two structures, for example, integrating a plurality of wall elements (wall elements). The spiral steel bars are exposed from the end parts of the wall units, and the spiral steel bars exposed out of the wall surfaces cannot block the insertion of the subsequent spiral connecting steel bars by a pouring method; the last screw connector is inserted into the space formed by the structure in the construction site by rotating downwards, and when the screw connector is inserted to the bottommost part, the space 5 is connected by pouring concrete or grouting.

The connection shown in fig. 1 is advantageous in that it allows vertical connection between two prefabricated walls and other concrete structures without the need for formwork. Only a small interstitial space 3 needs to be sealed before grouting. Furthermore, the interlocking helical reinforcement provides a constraint to increase strength when the concrete joint is subjected to compression and external forces.

As shown in fig. 2, the periodic reinforcing bars poured into the prefabricated units are formed by bending (bent) one continuous (continuous) reinforcing bar into a W shape. The steel bars bent to form the W-shape 1 are poured into the prefabricated wall units a, B, which are arranged according to the length of the wall surface, preferably at the same level as the wall surface. The partially W-shaped bars protrude from the prefabricated wall units and the exposed bars form a plurality of spaces 4 with the concrete surface at intervals. The W-shaped bars may be welded to form a longitudinal reinforcement in the wall unit to enhance anchoring. The wall unit a and the wall unit B form a space 6 after being placed at a construction site, and the W-shaped steel bars extend into the space 6. The screw connector 3 is inserted into the space 6 from the top end of the wall surface by a downward rotation motion. Since the W-shaped steel bar is bent and disposed, a collapsing path (surfing path) of the screw connection 3 can pass through a space 4 formed by the W-shaped steel bar and the concrete. After the screw connector 3 is inserted to the bottom, the space 6 is connected by concrete pouring or grouting.

FIG. 2 illustrates various connection applications that may connect elements at different angles, or may be T-joints. It will thus be seen that this connection allows two or more elements to be easily joined, with the advantage that no site building formwork is required. Only a small gap of the space 3 needs to be sealed before grouting.

As shown in fig. 3A and 3B, a plurality of longitudinal bars 2 are welded to the periphery of the rebar 1 to form a rebar assembly 3, and the rebar assembly 3 is shown to have four longitudinal bars 2. The spiral steel bar component 3 is poured into the prefabricated wall surface at a proper position according to the requirement of the structure body. Generally, the end of the wall of the structure requires more spiral reinforcing steel bar elements, and the spiral reinforcing steel bar elements arranged on the middle section of the wall can have larger intervals. A plurality of longitudinal reinforcement 2 of spiral reinforcement assembly 3 will become the main reinforcing bar of prefabricated wall, and it is restrainted by the spiral reinforcement through the welding, consequently no longer need other lacing wire or stirrup restraint longitudinal reinforcement 2. The prefabricated wall elements are produced by casting them with a removable mold or filling material or other suitable means, as shown in section 1-1 of fig. 3C, so that the cavities 4 of the rebar assemblies 3 remain empty and are not filled with concrete.

Two types of spiral reinforcing bar connectors shown in fig. 3B are used as connection preforms. The first is a single-twisted steel coupling in which the longitudinal steel bar 6 is welded to the inside of one of the twisted steel bars 5. In the second type of double helical connector, the longitudinal reinforcement 10 is placed between two helical reinforcement 8, 9 spirally fastened to each other at 180 ° apart and welded to the inner side thereof. As shown in fig. 3C 2-2 cut plane, the connector rebar 5 is designed to have a diameter slightly smaller than the rebar assembly 3, but with the same pitch as the rebar assembly 3. Therefore, before hoisting, the spiral connecting piece can be rotated into the bottom of the main spiral hollow 4 of the upper prefabricated wall in a rotating mode as shown in the left drawing of fig. 3C, and is completely hidden in the hollow 4. When the prefabricated wall on the upper part is hoisted, the cavity 4 of the prefabricated wall is aligned with the cavity 4 at the top of the prefabricated wall with a similar steel bar structure at the lower part. The constructor can insert the tool 8 into the hollow 4 of the upper prefabricated wall or control the screw connector 5 to rotate downwards by other methods so that half of the screw connector moves into the main screw-reinforcing bar assembly of the lower prefabricated wall, and then slip casting or pouring concrete is performed to fill the hollow 4. After the cement paste or concrete is solidified, the upper part and the lower part of the prefabricated wall are overlapped by the longitudinal steel bar 2 and the longitudinal steel bar 6, and the spiral steel bar 1 and the spiral steel bar 5 are overlapped to form an effective structure for transmitting the internal force of the upper part and the lower part of the prefabricated wall by the longitudinal steel bar 2. The screw connection member 5 further penetrates the joint of the upper and lower prefabricated walls, which can enhance the shear strength of the joint.

The connection shown in fig. 3A to 3C has the advantage that without any form, the helical reinforcement assembly already provides lateral restraint to the longitudinal reinforcement, thus avoiding or reducing the need for a stirrup operation that requires intensive manual handling. The rebar assemblies can be produced through factory automation, particularly through the use of welding robots. In the past, the shear strength of the horizontal joints of walls or columns was weak because there was only vertical rebar connections. The shear strength of the joint can be enhanced by innovatively utilizing the result that the spiral steel bar penetrates through the joint, and the method is suitable for being applied to seismic zone areas.

Fig. 4 illustrates the joining of two prefabricated floor panels, essentially like two prefabricated wall surfaces joined in a horizontal manner into a slab, but with some adjustments. The prefabricated panels a and B are placed adjacent to each other with a small distance 1 of about 20 mm. The screw connection assembly comprises a helical reinforcement 3 welded with longitudinal reinforcements 2, and the design is similar to that of fig. 3C, and can also be designed with a single screw or a double screw connection. As shown in fig. 4, the edges of the prefabricated floor slab are formed with a plurality of void spaces 4 at appropriate intervals 7. Each void space 4 is designed to have a space large enough to accommodate a screw connection assembly. The prefabricated panels on one side have a deep hollow space, and the depth of the hollow space is enough to temporarily store and place the spiral connecting components.

A wire 5 or other connecting member is securely tied to one end of the screw connector and the other end extends into the gap between the two panels. When the prefabricated panels are positioned, the hollow spaces 4 of the prefabricated panels A and B are matched with each other and face each other. The screw connector is moved into the opposite prefabricated panel by pulling the wire 5 or other means. In the final position, the screw connection members of equal length 6 are embedded in the two prefabricated panels. After the screw connection assembly is positioned, the space and the hollow space are filled with slurry to complete the connection of the structural body. After the connection is completed, the longitudinal steel bars of the spiral connection assembly can bear bending moment at the connection position, and the spiral steel bars can bear shearing force at the connection position. The connection shown in fig. 4 does not require any form work, only a small void space needs to be sealed before grouting.

As shown in fig. 5-9, which illustrate a further scope of the invention, this embodiment is a prefabricated wall a joined to a prefabricated wall B in a face-to-face relationship. The inner wall surfaces (internal faces) of the prefabricated wall surfaces are arranged face to face. In the prefabrication process, as shown in the perspective view of fig. 6 and the overhead view of fig. 7, a plurality of cavities 1 are formed on the inner wall surface, and the cavities 1 are arranged at appropriate intervals according to the design requirements of the structure. The hollow 1 may be formed in a semicircular or other sectional shape and vertically extend along the height of the prefabricated wall surface. The hollow of the prefabricated wall surface A corresponds to the hollow of the prefabricated wall surface B, and the two hollow form a continuous channel along the wall height in a face-to-face mode.

As shown in fig. 5, the reinforcing bars bent into the W-shape are poured into the continuous channel 1 of the prefabricated wall, and the partially bent reinforcing bars are protruded out of the prefabricated wall. The W-shaped reinforcing bars are firmly anchored in the precast concrete by means of embedment. In addition, in order to achieve anchoring, the W-shaped reinforcing bars can be welded with the longitudinal reinforcing bars 3 in the prefabricated wall body. The W-shaped reinforcing bars form triangular cavities with the inner wall surface of the prefabricated wall, and the attributes of the W-shaped reinforcing bars are defined by width (width) and pitch (pitch).

After the prefabricated wall surface is properly set at the site of the construction site, as shown in fig. 5 and 8, the spiral reinforcing bars having the same height as the prefabricated wall surface are inserted into the through-holes 2 from the top of the wall surface in a rotary actuating manner. The pitch of the spiral bars is the same as the pitch of the W-shaped bars. The diameter of the spiral shape is designed to allow the spiral reinforcing bars to pass through the triangular hollow spaces 2 formed between the W-shaped exposed reinforcing bars and the inner wall surface of the prefabricated wall surface. The W-shaped reinforcing bars of the prefabricated wall surfaces a and B are in a staggered form so that the spiral reinforcing bars can pass through all the triangular cavities 2 of the two wall surfaces when the spiral reinforcing bars advance downwards. Thus, the spiral reinforcement and the W-shaped reinforcement do not necessarily touch each other, but they form an interlocking pattern.

After the rebar is inserted into the bottom of the wall, concrete is poured or grouted to the perforations 3 and to fill all the voids. After the concrete or grout hardens, the internal forces of the structure are transferred from the rebar into the W-shaped rebar through the strong concrete or grout. Therefore, the two prefabricated wall surfaces A and B can bear the load of the structure body together, and the structural performance of the prefabricated wall surfaces A and B is equivalent to that of a cast-in-place reinforced concrete wall body with the total thickness of the two wall bodies.

The new connection method of the present invention can be used to connect more than two wall surfaces, such as the embodiment shown in fig. 9, which has four wall surfaces a, B, C, D. Prefabricated wall A and prefabricated wall B set up side by side, and prefabricated wall C and prefabricated wall D set up side by side. The prefabricated walls are assembled together to form a complete wall, by the above-mentioned joining method or other means. At the joints of the four prefabricated walls, the force of the structure is transferred through the spiral steel bar connecting pieces.

It should be noted that the perforations, in addition to being circular, may be any shape that can be formed in the end of a prefabricated wall and filled with grout. The reinforcing bars bent in a W shape and cast on the end of the wall surface are produced by a factory, and a part of the W-shaped reinforcing bars is extended outwardly into the through-holes. The W-shaped steel bars on each wall surface have the same and consistent tooth pitch as that of the corresponding wall surface, or the tooth pitch of the multiples or fractional proportions of the tooth pitch of the corresponding wall surface, so that cavities are formed to enable the W-shaped steel bars to be mutually connected.

At the construction site, four prefabricated walls are placed together to form a continuous channel along the height of the walls. The pitch of the spiral reinforcing bar coupler has the same pitch as that of the W-shaped reinforcing bar and is inserted into the continuous channel in a downward rotary motion. The triangular hollow/hole formed by the W-shaped steel bar on the prefabricated wall surface is matched with the pitch path of the spiral steel bar connecting piece. Therefore, the rebar can smoothly enter the bottom of the wall, so that the rebar and the W-shaped rebar of the four prefabricated walls are in a mutual buckling mode even though the rebar and the W-shaped rebar do not necessarily touch each other.

Concrete is poured or grouted to the continuous channel and fill all the space. The internal force of the structure is transmitted through the spiral reinforcing bars and the W-shaped reinforcing bars, thereby effectively connecting the four prefabricated wall structures.

As shown in fig. 10, fig. 10 depicts a scheme of connecting in three helical structures of the present invention. In the prefabrication process, the hollow holes 1 are formed on the inner surface of the concrete wall, and the hollow holes 1 have proper intervals according to the structural design requirement. The hollow 1 may be semicircular or otherwise shaped and extends vertically along the height of the prefabricated wall. Prefabricated wall a faces prefabricated wall B with similar hollows to form a continuous channel extending along the height of the wall. The W-shaped steel bars are replaced by two spiral steel bars 6, the two spiral steel bars 6 have the same height and are respectively poured on the prefabricated wall surface, and a part of each spiral extends out of the prefabricated wall to protrude out of the continuous channel. The spiral steel bar is firmly anchored in the prefabricated wall surface in a mode of embedding the precast concrete. The connecting spiral bars 7 are fastened to each other with the two spiral bars 6.

As shown in fig. 11, the property of the rebar is defined by its pitch (pitch) and radius (diameter). When the prefabricated wall is correctly placed in the construction site, a third spiral reinforcement/spiral connector 7 having a height equal to the height of the wall is inserted into the through hole from the top of the wall in a rotary manner. The spiral reinforcing steel bars cast on each wall surface have the same pitch as the third spiral reinforcing steel bars or have pitches in multiple.

According to the above design, the third rebar 7 will not be hindered by the first and second rebar, and can pass through the channel to the bottom of the prefabricated wall. As shown in fig. 12, the three reinforcing bars do not necessarily touch each other, but the connecting reinforcing bar 7 and the two reinforcing bars 6 are fastened to each other.

Fig. 13 illustrates that the above connection manner can connect more than 2, such as 4, walls. Walls a and B are placed face to face, as are walls C and D. The ends of A, B, C, D are placed together. The four prefabricated walls are combined at the joints to form a hollow 8 which can be round or in other suitable shapes. Four groups of spiral steel bars are poured at the end parts of the walls A, B, C and D in a factory. The spiral reinforcing steel bars 9 extend outwards to the outside of the wall body and protrude out of the hollow. At the construction site, four wall surfaces are placed together and form a continuous channel along the height of the walls. A reinforcing screw 11 having the same pitch as the reinforcing screw is inserted into the continuous passage in a manner of being rotated from the top down. The rebar 9 poured on the end of the wall surface is vertically staggered from the one-side rebar by 1/4 pitch so that the rebar connector 11 passes through downwards and appears staggered but not obstructed. The rebar connector 11 and the four rebars 9 do not necessarily touch each other, but are in a buckled manner.

Concrete is poured or grouted to the continuous channel and fill all the space. The internal force of the structure body can penetrate through the spiral reinforcing steel bars, so that the four prefabricated walls are effectively and structurally connected.

The longitudinal steel bars and the spiral steel bars can be replaced by other metal or carbon fiber and other appropriate structural material strips.

The present disclosure is not limited to the particular systems, devices, and methods described, as these may vary. The terminology used in the description is for the purpose of describing the particular versions or embodiments only and is not intended to limit the scope.

In the foregoing detailed description, reference is made to the accompanying drawings, which form a part hereof. In the drawings, like numerals typically identify like components, unless context dictates otherwise. The illustrated embodiments described in the detailed description, drawings, and claims are not meant to be limiting. Other embodiments may be utilized, and other changes may be made, without departing from the spirit or scope of the subject matter presented here. It will be readily understood that the aspects of the present disclosure, as generally described herein, and illustrated in the figures, can be arranged, substituted, combined, separated, and designed in a wide variety of different configurations, all of which are explicitly contemplated herein.

The present disclosure in accordance with certain embodiments described herein is not to be limited in scope by the specific aspects illustrated. As will be apparent to those skilled in the art, many modifications and variations are possible without departing from the spirit and scope of the disclosure. Functionally equivalent methods and apparatus, other than those enumerated herein, will be apparent to those skilled in the art from the foregoing description, within the scope of the present disclosure. Such modifications and variations are intended to fall within the scope of the appended claims. The disclosure is to be limited only by the terms of the appended claims, along with the full scope of equivalents to which such claims are entitled. It is to be understood that this disclosure is not limited to particular methods, reagents, compounds, compositions or biological systems, which can, of course, vary. It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting.

Various of the above-disclosed and other features and functions, or alternatives thereof, may be desirably combined into many other different systems or applications. Various presently unforeseen or unanticipated alternatives, modifications, variations or improvements therein may be subsequently made by those skilled in the art, each of which is also intended to be encompassed by the disclosed embodiments.

Claims

1. A connection structure between prefabricated reinforced concrete structures, comprising:

a first prefabricated reinforced concrete structure selected from the group consisting of walls, columns, beams, floors and decks, said first prefabricated reinforced concrete structure having one or more first helical reinforcing connectors partially embedded along a side of said first prefabricated reinforced concrete structure, partially periodically protruding out of said structural plane, each outward protruding portion forming a plurality of cavities with said side of said first prefabricated reinforced concrete structure, said cavities for receiving a connector element;

a second prefabricated reinforced concrete structure selected from a wall, column, beam, floor or deck structure, along the sides of said second prefabricated reinforced concrete structure, designed with one or more second helical reinforcing connectors partially embedded, partially periodically protruding out of the structural plane, each outward protrusion forming with said sides of said second prefabricated reinforced concrete structure a plurality of hollows for receiving a connecting element; and a rotatable screw type connecting member which is combined with the hollow of the first screw type reinforcing steel bar connecting member and the hollow of the second screw type reinforcing steel bar connecting member in a staggered manner.

2. A connection between prefabricated reinforced concrete structures as claimed in claim 1, wherein said connection further comprises a cast in place concrete or by grouting into the space between said first and second prefabricated reinforced concrete structures.

3. A connection structure between prefabricated reinforced concrete structures as claimed in claim 1, wherein said one or more helical reinforcing connectors respectively comprise a plurality of periodic projections of sinusoidal or other type.

4. A coupling structure between prefabricated reinforced concrete structures as claimed in claim 1, wherein each of said spirally-shaped reinforcing bar couplers includes one or more reinforcing bars coupled to said reinforcing bar coupler.

5. A connection structure between prefabricated reinforced concrete structures as claimed in claim 3, wherein each of said plurality of sinusoidal or other type periodic projections includes one or more reinforcing bars joined to said reinforcing bar coupler.

6. A connection structure between prefabricated reinforced concrete structures as claimed in claim 1, wherein the pitch of said helical connecting elements is equal to or equal to the distance between adjacent hollows.

7. A connection structure between prefabricated reinforced concrete structures as claimed in claim 1, wherein said connection structure further comprises:

at least one third prefabricated reinforced concrete structure selected from the group consisting of walls, columns, beams, floors or counter-tops, said third prefabricated reinforced concrete structure comprising:

one or more third spiral reinforcing steel bar connectors are designed to be partially embedded along the side surface of the third prefabricated reinforced concrete structure body, and partially and periodically protrude out of the structural plane, and each outward protruding part and the side surface of the third prefabricated reinforced concrete structure body form a plurality of hollow holes which are used for receiving a connecting element; wherein

The rotatable spiral connecting element is combined with the hole of the first spiral steel bar connecting piece, the hole of the second spiral steel bar connecting piece and the hole of the third spiral steel bar connecting piece in a staggered mode.