CN114059661A - Self-supporting node connecting structure of concrete prefabricated part and mounting method thereof - Google Patents
Self-supporting node connecting structure of concrete prefabricated part and mounting method thereof Download PDFInfo
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- CN114059661A CN114059661A CN202111365145.8A CN202111365145A CN114059661A CN 114059661 A CN114059661 A CN 114059661A CN 202111365145 A CN202111365145 A CN 202111365145A CN 114059661 A CN114059661 A CN 114059661A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
- E04B1/21—Connections specially adapted therefor
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/58—Connections for building structures in general of bar-shaped building elements
- E04B1/5806—Connections for building structures in general of bar-shaped building elements with a cross-section having an open profile
- E04B1/5818—Connections for building structures in general of bar-shaped building elements with a cross-section having an open profile of substantially U - form
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/58—Connections for building structures in general of bar-shaped building elements
- E04B1/5825—Connections for building structures in general of bar-shaped building elements with a closed cross-section
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
Abstract
The invention discloses a self-supporting node connecting structure of a concrete prefabricated part and an installation method thereof, wherein the self-supporting node connecting structure comprises a hollow core column, a cross beam and an I-shaped self-supporting structure; concrete is filled in the hollow core column, a through hole is formed in the center of the concrete, and the axial direction of the through hole is consistent with the length direction of the hollow core column; right-angle partition plates are arranged at the end parts of the inner parts of the cross beams, the lower parts of the end parts of the cross beams are isolated into hollow areas, gaps are formed in the hollow areas at the end parts of the cross beams, and concrete is filled in the outer parts of the hollow areas of the cross beams; the I-shaped self-supporting structure comprises a T-shaped support and a butterfly-shaped support; the T-shaped support comprises a bottom plate and a support column, and the support column is vertically arranged on the bottom plate; the butterfly support comprises a sleeve, a vertical plate and a transverse plate, the sleeve is embedded and fixed on the support column, one end of the vertical plate is connected with the sleeve, and the transverse plate is arranged at the other end of the vertical plate; the height of the hollow area at the end part of the cross beam is equal to the distance from the bottom of the bottom plate to the top of the transverse plate. And connecting parts such as bolts are reduced, the mounting mode is convenient and fast, and the mounting efficiency is improved.
Description
Technical Field
The invention belongs to the field of prefabricated concrete structures, and relates to a self-supporting node connecting structure of a concrete prefabricated part and an installation method thereof.
Background
At present, most buildings in China are constructed by adopting the cast-in-place reinforced concrete technology. Along with the popularization and application of the prefabricated concrete technology, in order to ensure that the structural performance of the prefabricated concrete structure is not lower than that of a cast-in-place concrete structure, corresponding concrete structure technical regulations are formulated in China, including aspects from structural design to component prefabrication, field construction and the like, the basic idea is to reasonably split the cast-in-place concrete structure, prefabricate components in factories, assemble the components in the fields and the like, wherein the splitting is beneficial to the prefabrication in factories and the assembly in the fields, and the assembled structure meets the requirements on the safety and the functionality of the structure.
However, the existing fabricated concrete structure is often complex and tedious in assembling process, needs too many connecting parts such as bolts and the like to be connected and fixed, and is too low in installation efficiency.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a self-supporting node connecting structure of a concrete prefabricated part and an installation method thereof, which reduce connecting parts such as bolts and the like, are convenient and quick in installation mode and improve the installation efficiency.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
a self-supporting node connecting structure of a concrete prefabricated part comprises a hollow core column, a cross beam and an I-shaped self-supporting structure;
concrete is filled in the hollow core column, a through hole is formed in the center of the concrete, and the axial direction of the through hole is consistent with the length direction of the hollow core column;
right-angle partition plates are arranged at the end parts of the inner parts of the cross beams, the lower parts of the end parts of the cross beams are isolated into hollow areas, gaps are formed in the hollow areas at the end parts of the cross beams, and concrete is filled in the outer parts of the hollow areas of the cross beams;
the I-shaped self-supporting structure comprises a T-shaped support and a butterfly-shaped support; the T-shaped support comprises a bottom plate and a support column, and the support column is vertically arranged on the bottom plate; the butterfly support comprises a sleeve, a vertical plate and a transverse plate, the sleeve is embedded and fixed on the support column, one end of the vertical plate is connected with the sleeve, and the transverse plate is arranged at the other end of the vertical plate; the height of the hollow area at the end part of the cross beam is equal to the distance from the bottom of the bottom plate to the top of the transverse plate;
the top of the hollow area at the end part of the cross beam is positioned on the transverse plate, and the end part of the cross beam and the transverse plate are connected in a penetrating way by bolts; the hollow core column is positioned above the end part of the cross beam and right above the I-shaped self-supporting structure, and concrete is filled in an area enclosed among the bottom of the hollow core column, the front part of the front end of the cross beam and the upper part of the bottom plate of the I-shaped self-supporting structure.
Preferably, the I-shaped self-supporting structure is connected with a plurality of cross beams, vertical plates and transverse plates on the butterfly supports are correspondingly arranged, and the cross beams are in a straight shape, an L shape, a T shape and a cross shape.
Preferably, a first steel bar is arranged in the hollow core column, the first steel bar extends out of the top end and the bottom end of the hollow core column, and a thread is arranged at the top end part of the first steel bar, which extends out of the hollow core column; and a mounting hole corresponding to the position of the first steel bar is formed in the bottom plate of the T-shaped support.
Preferably, the area enclosed between the bottom of the hollow core column, the front of the end part of the cross beam and the upper part of the bottom plate of the I-shaped self-supporting structure is filled with UHPC, and the concrete filled in the hollow core column and the cross beam is recycled concrete.
Preferably, be provided with the continuous stirrup of post on the hollow core post inner wall, be provided with the continuous stirrup of a plurality of roof beams and second reinforcing bar on the crossbeam inner wall, the vertical setting of the continuous stirrup of roof beam, second reinforcing bar level setting.
Further, one half of the continuous hooping of the column is embedded in the inner wall of the hollow column, and the other half of the continuous hooping of the column protrudes out of the surface of the inner wall of the hollow column; half of the beam continuous stirrups are embedded in the inner wall of the cross beam, and the other half of the beam continuous stirrups protrude out of the surface of the inner wall of the cross beam.
Preferably, the top of the end part of the cross beam is horizontally provided with a steel base plate, the steel base plate is provided with a vent hole, and the end part of the cross beam is provided with a bolt hole which vertically penetrates through the end part of the cross beam and the steel base plate.
Preferably, the outer wall of the support column is provided with threads, the outer wall of the support column is connected with two nuts through the threads, and the sleeve supported by the butterfly shape is located between the two nuts.
Further, its characterized in that, the nested two rectangle gaskets that have on the support column outer wall, between two equal nuts of two rectangle gaskets, the sleeve that the butterfly supported is located between two rectangle gaskets.
A method for installing the self-supporting node connecting structure of the concrete prefabricated part based on any one of the above items comprises the following steps:
the bottom plate of the T-shaped support is installed and fixed on the base body, the bottom of the end part of the cross beam is placed on the transverse plate of the butterfly-shaped support, the end part of the cross beam and the transverse plate are connected through bolts penetrating through the end part of the cross beam and the transverse plate, the hollow core column is placed above the end part of the cross beam and is located right above the I-shaped self-supporting structure, concrete is poured into an area defined by the bottom of the hollow core column, the front of the front end of the cross beam and the upper part of the bottom plate of the I-shaped self-supporting structure through a through hole in the hollow core column, and installation is completed.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the hollow area is arranged below the end part of the cross beam, the end part of the cross beam can be placed on the transverse plate of the butterfly-shaped support, and then the cross beam and the I-shaped self-supporting structure are connected by adopting the bolts in a penetrating way, so that the cross beam can be quickly connected with the I-shaped self-supporting structure, the hollow core column is placed above the end part of the cross beam and is positioned right above the I-shaped self-supporting structure, concrete is poured into an area enclosed by the bottom of the hollow core column, the front of the front end of the cross beam and the upper part of the bottom plate of the I-shaped self-supporting structure through the through hole in the hollow core column, and the installation is finished by only using a small amount of connecting parts such as bolts and the like.
Furthermore, the mounting hole in the bottom plate is connected with the top of the first steel bar, so that the connection of the I-shaped self-supporting structure and the bottom hollow column can be realized, and the continuous mounting of the multi-stage node connection structure is realized.
Furthermore, the UHPC is used as a core body reinforcing material, so that the performance of the member can be effectively improved, the connection performance of the longitudinal steel bar is ensured, the UHPC and the recycled concrete are combined, the performance reduction of the recycled concrete member caused by the initial damage of an aggregate interface can be eliminated, the weight of the prefabricated member is reduced, and the method is suitable for an industrial production mode.
Further, the sleeve of the butterfly support can be adjusted in height through the position adjustment of the two nuts, so that the target elevation is achieved, and the sleeve adapts to the height of the end part of the cross beam.
Further, the sleeve that the rectangle gasket can protect the butterfly to support can not receive the extrusion to take place the deformation.
Drawings
FIG. 1 is a schematic view of a self-supporting node connection structure of a concrete prefabricated part according to the present invention;
figure 2 is a front view of a hollow stem of the present invention;
figure 3 is a top view of the hollow stem of the present invention;
FIG. 4 is a schematic view of a reinforcing bar positioning plate according to the present invention;
FIG. 5 is a front view of the cross beam of the present invention;
FIG. 6 is a side view of a beam of the present invention;
FIG. 7 is a top view of a right angle baffle of the present invention;
FIG. 8 is a side view of a right angle baffle of the present invention;
FIG. 9 is a schematic illustration of an I-shaped self-supporting construction of the present invention;
FIG. 10 is a schematic view of a T-shaped support of the present invention;
FIG. 11 is a schematic view of the bottom plate of the T-shaped support of the present invention;
FIG. 12 is a schematic structural view of a butterfly support of the present invention;
FIG. 13 is a schematic view of a rectangular shim according to the present invention;
wherein: 1-hollow core column; 2-a cross beam; 3-i-form self-supporting structures; 4-concrete; 5-column continuous hooping; 6-first steel bar; 7-a through hole; 8-a steel bar positioning plate; 9-beam continuous stirrup; 10-a second steel bar; 11-a steel backing plate; 12-a vent hole; 13-bolt holes; 14-right angle baffles; 15-T type support; 16-butterfly shaped support; 17-a base plate; 18-a support column; 19-a nut; 20-mounting holes; 21-rectangular spacer; 22-a sleeve; 23-a riser; 24-transverse plate.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
as shown in fig. 1, the self-supporting node connection structure of a concrete prefabricated part according to the present invention includes a hollow column 1, a cross beam 2 and an i-shaped self-supporting structure 3.
As shown in fig. 2 and fig. 3, the hollow column 1 can be a cylinder or a square column, the present embodiment adopts a square column, the wall thickness of the hollow column is 20-30 mm, the inner wall of the hollow column 1 is a rough surface, and the column continuous stirrup 5 is fixed on the inner wall along the circumferential direction, the cross section 1/2 of the column continuous stirrup 5 is embedded in the inner wall, and 1/2 protrudes out of the inner surface thereof.
Be provided with first reinforcing bar 6 in the cavity post 1, first reinforcing bar 6 sets up along 1 length direction of cavity post, and in this embodiment, 6 quantity of first reinforcing bar are eight, are located the central point on four angles and four limits respectively and put, and the contact of 5 salient surfaces of 6 side surfaces of first reinforcing bar and the continuous stirrup of post, first reinforcing bar 6 stretch out 1 apical bottom of cavity post, and first reinforcing bar 6 stretches out 1 top portion of cavity post and is provided with the screw thread.
The inside packing of hollow core post 1 has concrete 4, and recycled concrete is adopted to this embodiment, and 4 center departments of concrete are provided with through- hole 7, and 7 axial of through-hole are unanimous with 1 length direction of hollow core post, and 7 diameters of through-hole are 50 ~ 80 mm.
Be provided with reinforcing bar locating plate 8 near the bottom position in the hollow core post 1, reinforcing bar locating plate 8 size is less than hollow core post 1 size 50 ~ 100mm, and concrete 4 is located reinforcing bar locating plate 8 top, and as shown in fig. 4, through-hole 7 passes 8 central points in the reinforcing bar locating plate and puts, is provided with the round hole that lets first reinforcing bar 6 pass on the reinforcing bar locating plate 8.
After prefabrication of the column continuous stirrup 5 and the hollow column 1 is completed, a first steel bar 6 and a steel bar positioning plate 8 are installed, the first steel bar 6 and a mould PVC pipe of a through hole 7 are fixed through the steel bar positioning plate 8, wherein the threaded part of the first steel bar 6 extends out of the upper part of the hollow column 1, and the first steel bar 6 penetrates through a round hole of the lower steel bar positioning plate 8; adjusting the position of the reinforcing steel bar positioning plate 8 to enable the reinforcing steel bar positioning plate to contract 50-100 mm towards the hollow core column 1, pouring recycled concrete after the reinforcing steel bar positioning plate is fixed, removing the mould PVC pipe of the through hole 7 after the recycled concrete is flush with the top of the hollow core column 1 and the maintenance of the recycled concrete reaches a certain strength, and completing prefabrication of the whole hollow core column 1.
As shown in fig. 5 and 6, the lateral surface of the beam 2 is U-shaped, the inner wall of the beam 2 is a groove rough surface, a plurality of beam continuous stirrups 9 are vertically arranged on the inner wall of the beam 2, three edges of the beam continuous stirrups 9 are poured and fixed in the beam 2, the top of the beam continuous stirrups 9 is 50mm higher than the top of the beam 2, the cross section 1/2 of the beam continuous stirrups 9 is embedded in the inner wall of the beam 2, and 1/2 protrudes out of the inner wall of the beam 2.
Be provided with second reinforcing bar 10 in the crossbeam 2, second reinforcing bar 10 sets up along 2 length direction on empty crossbeam, and in this embodiment, first reinforcing bar 6 quantity is five, and the contact of the continuous stirrup 9 protrusion surface of second reinforcing bar 10 side surface and roof beam.
The steel backing plate 11 is arranged on the upper surface of the end part of the cross beam 2, the right-angle partition plate 14 is arranged on the lower part of the end part of the cross beam 2, as shown in fig. 7 and 8, the right-angle partition plate 14 is provided with two right angles, three surfaces in total, stepped pattern steel plates are adopted, 2 bolt holes 13 with the size of 20mm are arranged on two sides of an upper step, 1 vent hole 12 with the size of 20mm is arranged in the middle of the upper step, and the right-angle partition plate 14 and the steel backing plate 11 penetrate through.
The right-angle partition plate 14 isolates the lower part of the end part of the cross beam 2 into a hollow area to form a two-stage step type space, and a horizontal steel bar round hole is reserved at the position of the lower stage step corresponding to the second steel bar 10 at the bottom of the cross beam 2, so that the longitudinal steel bar at the bottom of the precast beam passes through the lower stage step. The end of the cross beam 2 is provided with a notch in the hollow area, and the cross beam 2 is filled with concrete 4 in the outside of the hollow area, and recycled concrete is used in the embodiment.
The beam continuous stirrups 9 and the second reinforcing steel bars 10 are installed in the beam 2, factory prefabrication of the beam 2 is completed, the beam longitudinal reinforcing steel bars, the right-angle partition plates 14, the bolt holes 13 and the PVC pipe molds of the vent holes 12 of the beam 2 are installed, after the PVC pipe molds are fixed in place, the recycled concrete is poured, the steel base plate 11 is placed on the upper side of the end part of the beam 2 before the recycled concrete is initially set, meanwhile, the groove rough surface is formed on the upper surface of the recycled concrete, and the bonding strength of the post-cast concrete 4 of the floor slab and the beam 2 is enhanced.
As shown in fig. 9, the drum-type self-supporting structure 3 includes T-shaped supports 15 and butterfly supports 16.
As shown in fig. 10, the T-shaped support 15 includes a bottom plate 17 and a support column 18, as shown in fig. 11, the size of the bottom plate 17 is the same as that of the hollow column 1, and the bottom plate 17 is provided with mounting holes 20 at the periphery thereof corresponding to the positions of the first reinforcing bars 6.
The supporting column 18 is vertically arranged on the bottom plate 17 and located in the center of the bottom plate 17, the supporting column 18 can be a solid column or a hollow tube, and a UHPC or steel column is arranged in the hollow tube to prevent the supporting column 18 from deforming under stress.
The outer wall of the supporting column 18 is provided with threads, and the outer wall of the supporting column 18 is connected with two nuts 19 through the threads.
As shown in fig. 12, the butterfly support 16 includes a sleeve 22, a vertical plate 23 and a transverse plate 24, the sleeve 22 is oval, the diameter of the short axis is the same as that of the support column 18, the diameter of the long axis is three times larger than that of the support column 18, the vertical plate 23 can avoid the longitudinal first steel bar 6 by adjusting the position in the direction of the long axis, and the sleeve 22 is fixed on the support column 18 in a nesting manner and located between two nuts 19; one end of a vertical plate 23 is connected with the sleeve 22, a transverse plate 24 is arranged at the other end of the vertical plate 23, one end of the vertical plate 23 is welded with the long axis direction of the sleeve, the upper surface of the other end of the vertical plate 23 is connected with the transverse plate 24, and circular holes are formed in the transverse plate 24 at the positions corresponding to the bolt holes 13 of the cross beam 2 and the vent holes 12; the height of the hollow area at the end of the cross beam 2 is equal to the distance from the bottom of the bottom plate 17 to the top of the cross plate 24.
As shown in fig. 13, two rectangular washers 21 are nested on the outer wall of the support column 18, each of the two rectangular washers 21 is located between two nuts 19, and the sleeve 22 of the butterfly support 16 is located between the two rectangular washers 21.
The T-shaped support 15 of the i-shaped self-supporting structure 3 is first mounted on top of the base body, which in this embodiment employs the hollow core column 1. And (3) penetrating the first steel bar 6 of the hollow column 1 through the steel bar positioning plate 8 at the lower part of the T-shaped support 15, and connecting the bottom plate 17 of the T-shaped support 15 with the top of the first steel bar 6 through a nut 19. The supporting column 18 of the T-shaped support 15 is threaded on the upper outer side to form threads for adjusting the elevation of the butterfly support 16 and fixing the butterfly support 16.
Next, the butterfly supports 16 of the i-shaped self-supporting structure 3 are assembled. The sleeve 22 is inserted into the supporting column 18, and the position is adjusted to the target elevation by adjusting the nut 19 according to the elevation of the beam 2, taking into account the thickness of the rectangular spacer 21.
The vertical plate 23 is welded to the long-diameter direction of the sleeve, the position of the first steel bar 6 of the upper hollow core column 1 is determined, the position of the sleeve is adjusted in the long-axis direction, the vertical plate 23 avoids the longitudinal first steel bar 6, and the rectangular gasket 21 is placed on the upper side of the sleeve to complete the assembly of the I-shaped self-supporting structure 3.
The cross beam 2 is fixed on the transverse plate 24 of the I-shaped self-supporting structure 3 through bolt holes 1327 at the end part, and the upper hollow column 1 is temporarily fixed on the upper surface of the cross beam 2.
And pouring UHPC to an area enclosed by the bottom of the hollow core column 1, the front of the front end of the cross beam 2 and the upper part of the bottom plate 17 of the I-shaped self-supporting structure 3 through the through hole 7 of the upper hollow core column 1 to form a UHPC reinforced core body, and finishing the installation.
As shown in fig. 1, after the installation is completed, the top of the hollow area at the end part of the cross beam 2 is positioned on the cross plate 24, and the end part of the cross beam 2 is connected with the cross plate 24 by a bolt in a penetrating way; the hollow core column 1 is positioned above the end part of the cross beam 2 and right above the I-shaped self-supporting structure 3, and UHPC is filled in a region enclosed among the bottom of the hollow core column 1, the front part of the front end of the cross beam 2 and the upper part of a bottom plate 17 of the I-shaped self-supporting structure 3.
The I-shaped self-supporting structure 3 is connected with a plurality of cross beams 2, vertical plates 23 and transverse plates 24 on the butterfly supports 16 are correspondingly arranged, and the cross beams 2 are in a straight shape, an L shape, a T shape and a cross shape.
The concrete process of the installation method of the self-supporting node connecting structure of the concrete prefabricated part is as follows:
the first step is as follows: prefabrication of the hollow columns 1 and the cross beams 2 is completed in a prefabrication factory.
The second step is that: and completing the welding and assembling work of the T-shaped support 15 and the butterfly-shaped support 16 of the I-shaped self-supporting structure 3.
The third step: after the hollow column 1 is in place in a construction site, a T-shaped support 15 and a butterfly-shaped support 16 of the I-shaped self-supporting structure 3 are arranged at the top of the hollow column, and the elevation adjustment and fixation of the sleeve 22 are completed through an adjusting nut 19.
The fourth step: the cross beam 2 is mounted and fixed to the i-shaped self-supporting structure 3 by means of bolt holes 13 at the ends.
The fifth step: and pouring the UHPC into the node space through the through hole 7 of the upper hollow core column 1 to form a UHPC reinforced core body, and finishing the construction of the self-supporting connecting structure of the concrete 4 prefabricated component.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (10)
1. A self-supporting node connecting structure of a concrete prefabricated part is characterized by comprising a hollow column (1), a cross beam (2) and an I-shaped self-supporting structure (3);
concrete (4) is filled in the hollow core column (1), a through hole (7) is formed in the center of the concrete (4), and the axial direction of the through hole (7) is consistent with the length direction of the hollow core column (1);
right-angle partition plates (14) are arranged at the end parts of the inner parts of the cross beams (2), the lower parts of the end parts of the cross beams (2) are isolated into hollow areas, gaps are arranged in the hollow areas at the end parts of the cross beams (2), and concrete (4) is filled in the outer parts of the hollow areas of the cross beams (2);
the I-shaped self-supporting structure (3) comprises a T-shaped support (15) and a butterfly-shaped support (16); the T-shaped support (15) comprises a bottom plate (17) and a supporting column (18), and the supporting column (18) is vertically arranged on the bottom plate (17); the butterfly support (16) comprises a sleeve (22), a vertical plate (23) and a transverse plate (24), the sleeve (22) is fixed on the support column (18) in an embedded mode, one end of the vertical plate (23) is connected with the sleeve (22), and the transverse plate (24) is arranged at the other end of the vertical plate (23); the height of a hollow area at the end part of the cross beam (2) is equal to the distance from the bottom of the bottom plate (17) to the top of the transverse plate (24);
the top of the hollow area at the end part of the cross beam (2) is positioned on the transverse plate (24), and the end part of the cross beam (2) is in through connection with the transverse plate (24) by adopting a bolt; the hollow column (1) is located above the end part of the cross beam (2) and right above the I-shaped self-supporting structure (3), and concrete (4) is filled in a region enclosed by the bottom of the hollow column (1), the front of the front end of the cross beam (2) and the upper part of a bottom plate (17) of the I-shaped self-supporting structure (3).
2. The self-supporting node connecting structure of the concrete precast element according to claim 1, wherein a plurality of cross beams (2) are connected to the I-shaped self-supporting structure (3), vertical plates (23) and transverse plates (24) on the butterfly supports (16) are correspondingly arranged, and a plurality of cross beams (2) are in a straight shape, an L shape, a T shape and a cross shape.
3. The self-supporting node connecting structure of the concrete prefabricated part according to the claim 1, wherein a first steel bar (6) is arranged in the hollow core column (1), the first steel bar (6) extends out of the top end and the bottom end of the hollow core column (1), and the top end part of the first steel bar (6) extending out of the hollow core column (1) is provided with a thread; and a mounting hole (20) corresponding to the position of the first steel bar (6) is formed in the bottom plate (17) of the T-shaped support (15).
4. The self-supporting node connecting structure of concrete prefabricated parts according to claim 1, characterized in that the concrete (4) filled in the area enclosed between the bottom of the hollow core column (1), the front of the end of the cross beam (2) and the upper part of the bottom plate (17) of the I-shaped self-supporting structure (3) is UHPC, and the concrete (4) filled in the hollow core column (1) and the cross beam (2) is recycled concrete.
5. The self-supporting node connecting structure of the concrete precast element according to claim 1, wherein a column continuous stirrup (5) is arranged on the inner wall of the hollow column (1), a plurality of beam continuous stirrups (9) and second reinforcing steel bars (10) are arranged on the inner wall of the cross beam (2), the beam continuous stirrups (9) are vertically arranged, and the second reinforcing steel bars (10) are horizontally arranged.
6. The concrete precast element self-supporting node connection structure according to claim 5, wherein one half of the column continuous stirrups (5) are embedded in the inner wall of the hollow column, and the other half of the column continuous stirrups protrude out of the surface of the inner wall of the hollow column; half of the beam continuous stirrups (9) are embedded in the inner wall of the cross beam (2), and the other half of the beam continuous stirrups protrude out of the surface of the inner wall of the cross beam (2).
7. The self-supporting node connecting structure of the concrete prefabricated part according to claim 1, characterized in that a steel base plate (11) is horizontally arranged on the top of the end part of the cross beam (2), a vent hole (12) is arranged on the steel base plate (11), and a bolt hole (13) is arranged on the end part of the cross beam (2) to vertically penetrate through the end part of the cross beam (2) and the steel base plate (11).
8. The self-supporting node connecting structure of the concrete prefabricated part according to the claim 1, characterized in that, the outer wall of the supporting column (18) is provided with threads, the outer wall of the supporting column (18) is connected with two nuts (19) in a threaded manner, and the sleeve (22) of the butterfly-shaped support (16) is positioned between the two nuts (19).
9. The precast concrete self-supporting nodal connection structure according to claim 8, characterized in that two rectangular washers (21) are nested on the outer wall of the supporting column (18), both rectangular washers (21) are between two nuts (19), and the sleeve (22) of the butterfly support (16) is located between the two rectangular washers (21).
10. A method for installing a self-supporting node connection structure of a concrete prefabricated part according to any one of claims 1 to 9, comprising the following processes:
the method comprises the steps of installing and fixing a bottom plate (17) of a T-shaped support (15) on a base body, placing the bottom of the end portion of a cross beam (2) on a transverse plate (24) of a butterfly-shaped support (16), connecting the end portion of the cross beam (2) and the transverse plate (24) through bolts in a penetrating mode, placing a hollow core column (1) above the end portion of the cross beam (2) and right above an I-shaped self-supporting structure (3), and pouring concrete (4) into an area formed by the bottom of the hollow core column (1), the front of the front end of the cross beam (2) and the upper portion of the bottom plate (17) of the I-shaped self-supporting structure (3) through a through hole (7) in the hollow core column (1) to complete installation.
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