CN106284681A - Assembly concrete entirety is without heat bridge board wall and running-on floor method of attachment - Google Patents

Abstract

This invention provides a method for connecting the prefabricated concrete integral heat-free bridge slab wall and the socket floor. Rows of connecting steel bars are exposed, the overlapping teeth of the tooth-shaped floor slab are overlapped with the inner row of hidden columns of the overall heat-free bridge slab wall, and the U-shaped sleeve tie and the stepped mouth are close to each other; after overlapping, the overall The non-thermal bridge slab wall and the top surface of the toothed floor slab form a contour plane as a whole, and the inner row of hidden columns is consistent with the bottom plane of the toothed floor slab. The beneficial effect of the invention is that the overall synergistic performance of the wall is good, the energy-saving performance is high, and the overall thermal bridge-free technology and the reinforced concealed column system are adopted, which can effectively cut off the thermal bridge and have good thermal insulation performance; significantly improve the seismic performance, and greatly Reduce the number of connectors, simplify construction, significantly improve its industrial efficiency, and reduce resource and energy consumption. In addition, this connection method is suitable for dry work and full assembly of precast concrete structures.

Description

Connection method of prefabricated concrete integral athermal bridge slab wall and socket floor slab

technical field

The invention relates to a building energy-saving wall body, in particular to a method for connecting an assembled concrete integral heat-free bridge slab wall and a socket floor slab in an energy-saving building.

Background technique

Prefabricated concrete buildings refer to prefabricated concrete components produced in factories. Concrete structure housing buildings designed and constructed through on-site assembly. The assembly methods of components generally include on-site post-cast laminated concrete, steel bar anchored post-cast concrete connection, etc.; steel bar connection can be made by sleeve grouting connection, welding, mechanical connection and lap connection of reserved holes. In the 1980s, prefabricated prefabricated large-slab houses, which were popular in my country, had many hidden dangers and defects that affected structural safety and normal use due to poor structural integrity, leakage, and floor cracks, and were gradually replaced by cast-in-place concrete structures. . However, with the current emerging application of prefabricated concrete structures, especially the introduction of many foreign advanced technologies in recent years, localized new technologies for the construction of prefabricated concrete structures are gradually forming.

With the acceleration of the process of "construction industrialization and housing industrialization" in China, and the continuous reduction of China's "demographic dividend", the labor shortage in the construction industry has emerged, and the trend of housing industrialization has become increasingly obvious. The application of prefabricated concrete structures has become a current research hotspot again. New technologies and new forms of prefabricated concrete structures for residential buildings are emerging all over the country. Prefabricated reinforced concrete structure is one of the important directions for the development of my country's building structure. It is conducive to the development of my country's building industrialization, improving production efficiency and saving energy, developing green and environmentally friendly buildings, and is conducive to improving and ensuring the quality of construction projects. Compared with the cast-in-place construction method, the prefabricated RC structure is conducive to green construction, because the prefabricated construction can better meet the requirements of green construction, such as land saving, energy saving, material saving, water saving and environmental protection, and reduce the negative impact on the environment. Including reducing noise, preventing dust, reducing environmental pollution, clean transportation, reducing site disturbance, saving water, electricity, materials and other resources and energy, and following the principles of sustainable development. Moreover, the prefabricated structure can continuously complete multiple or all processes of the project in sequence, thereby reducing the types and quantities of construction machinery entering the site, eliminating the idle time between processes, realizing three-dimensional cross operations, reducing the number of construction personnel, and improving Improve work efficiency, reduce material consumption, reduce environmental pollution, and provide guarantee for green construction. In addition, the prefabricated structure can reduce construction waste to a large extent (accounting for about 30%-40% of the total urban waste), such as waste steel bars, waste iron wires, waste bamboo wood, waste concrete, etc.

Prefabricated concrete buildings can be divided into two categories: full assembly and partial assembly according to the degree of assembly. Fully assembled buildings are generally limited to low-rise or multi-storey buildings with low seismic fortification requirements; the main components of partially assembled concrete buildings are generally prefabricated components, which are connected by cast-in-place concrete on site to form a building with an assembled monolithic structure.

North America is mainly dominated by the United States and Canada. Due to the long-term research and promotion of precast buildings by the Precast/Prestressed Concrete Association (PCI), the relevant standards and specifications for precast concrete are also very complete. Therefore, its prefabricated concrete building application is very common. Prefabricated buildings in North America mainly include two series of building prefabricated exterior walls and structural prefabricated components. The common feature of prefabricated components is the combination of large-scale and prestress. Structural reinforcement and connection construction can be optimized. Reduce the workload of production and installation, shorten the construction period, and fully reflect the characteristics of industrialization, standardization and technical economy. In the 20th century, prefabricated buildings in North America were mainly used in low-rise non-seismic fortified areas. Due to the impact of earthquakes in the California area, in recent years, great attention has been paid to the engineering application technology research of earthquake resistance and mid-rise prefabricated structures. PCI has recently published the book "Seismic Design of Precast Concrete Structures", which systematically analyzes the seismic design of prefabricated buildings from the perspective of theory and practice, and summarizes the latest scientific research achievements in the seismic design of prefabricated structures. Promotion has a strong guiding significance.

Europe is the birthplace of prefabricated buildings, and the road to industrialization of buildings began as early as the 17th century. After the Second World War, due to the shortage of labor resources, Europe further studied and explored the industrialization model of construction. Whether it is economically developed Northern Europe, Western Europe, or economically underdeveloped Eastern Europe, they have been actively promoting the design and construction of prefabricated concrete buildings. Accumulated a lot of experience in the design and construction of prefabricated buildings, formed various special prefabricated building systems and standardized general prefabricated product series, and compiled a series of precast concrete engineering standards and application manuals, which played a role in promoting the application of precast concrete in the world very important role.

Japan and South Korea have learned from the successful experience of Europe and the United States, on the basis of exploring the standardized design and construction of prefabricated buildings. Combined with their own requirements. Breakthroughs have been made in the integral seismic and isolation design of prefabricated structural systems. Representative achievements are the two 58-story Tokyo Towers built in Japan in 2008 using prefabricated frame structures. At the same time, the standard specifications for the design, production and construction of precast concrete building systems in Japan are also very complete. The prefabricated specifications currently in use include "Precast Concrete Engineering" (JASSl0) and "Concrete Curtain Wall) (JASSl4).

my country began to study the design and construction technology of prefabricated concrete buildings in the 1950s and 1960s, and formed a series of prefabricated concrete building systems. The more typical building systems include prefabricated single-storey industrial plant building systems and prefabricated multi-storey frame buildings. system, prefabricated slab building system, etc. By the 1980s, the application of prefabricated concrete buildings reached its heyday, and many parts of the country have formed a prefabricated concrete industrialized building model integrating design, production, construction and installation. Prefabricated concrete buildings and masonry buildings with prefabricated hollow-core slabs have become the two most important building systems, with an application penetration rate of over 70%. Due to the many limitations and deficiencies in the functions and physical properties of prefabricated buildings, the design and construction technology research and development level of prefabricated concrete buildings in my country cannot keep up with the changes in social needs and construction technology development. By the mid-1990s, prefabricated concrete buildings had been gradually replaced by all-cast-in-place concrete building systems. At present, except for the widely used building systems of prefabricated single-storey industrial buildings, other prefabricated building systems are rarely used in engineering applications. The prefabricated structure's anti-seismic integrity and professional research on design and construction management are not enough, the number of connectors is large, and high energy consumption results in poor technical and economical efficiency. It is the root cause of the long-term stagnation of prefabricated structures.

Contents of the invention

Aiming at the above existing problems, the present invention provides a method for connecting the prefabricated concrete integral heat-free bridge slab wall and the socket floor.

The technical solution adopted by the present invention is: an assembled concrete integral non-thermal bridge slab wall and the joint floor connecting node, including two parts: the integral non-thermal bridge slab wall and the toothed floor;

The overall heat-free bridge slab wall includes an inner edge concrete layer, an outer edge concrete layer, a concrete middle rib, an inner row of hidden columns, an outer row of hidden columns, an inner row of thermal insulation boards, an outer row of thermal insulation boards, an inner row of connecting steel bars, and an outer row of hidden columns. Rows of connecting steel bars, step openings, waterproof step openings, top surface of slab-bottom stepped walls, top surface of slab-top stepped walls, inner row of externally extending concealed columns, and wall bottom surface; the walls from front to back are the inner edge concrete layer, inner row insulation Slabs, concrete ribs, step openings, outer row insulation boards, waterproof step openings and outer concrete layer; inner row insulation boards and outer layer insulation boards are arranged at intervals of 100-200mm width, and inner row darkening panels are inserted at intervals Columns and outer rows of hidden columns; the inner row of hidden columns and the outer row of hidden columns are respectively embedded with inner row of connecting steel bars and outer row of connecting steel bars.

The toothed floor slab includes a board body, overlapping teeth, reserved openings for the hidden columns passing through the board and U-shaped sleeve fasteners; There is a U-shaped sleeve tie piece above the reserved opening of the column.

In a method for connecting a prefabricated concrete integral heat-free bridge slab wall and a socketed floor, the reserved opening of the hidden column passing through the upper part of the toothed floor corresponds to and fits with the inner row of hidden columns one by one, and the inner row of connecting steel bars is embedded. The inner row of hidden columns is exposed; the overlapping teeth of the tooth-shaped floor slab are overlapped with the wall between the inner row of hidden columns of the overall athermal bridge wall, and the U-shaped sleeve tie is adjacent to the step mouth; after the overlap , the overall heat-free bridge slab wall and the top surface of the toothed floor slab form a contour plane as a whole, and the inner row of hidden columns is consistent with the bottom plane of the toothed floor slab.

As a preferred technical solution: the thickness of the inner edge concrete layer, the outer edge concrete layer and the concrete middle rib of the connection joint between the prefabricated concrete integral heat-free bridge slab wall and the socket floor slab is equal.

As a preferred technical solution: the inner row of concealed columns and the outer row of concealed columns at the connection node of the assembled concrete integral athermal bridge slab wall and the sleeve floor slab are interlaced, and the middle of the inner row of concealed columns and the outer row of insulation boards are connected. Correspondingly, the outer row of hidden columns corresponds to the middle part of the inner row of insulation boards.

As a preferred technical solution: a prefabricated concrete integral heat-free bridge slab wall and the joint of the joint floor is located at the center line of the overall heat-free bridge slab wall, the outer side is higher than the inner side, and the height difference is a toothed floor slab The thickness is 100-200mm.

As a preferred technical solution: a prefabricated concrete integral heat-free bridge slab wall and the joint of the socket floor are connected with the inner row of connecting steel bars and the corresponding positions of the outer row of connecting steel bars. Steel bar interface; the extension length of the inner row of connecting steel bars and the outer row of connecting steel bars is equal to 200-500mm; the extension length of the inner row of concealed columns is equal to the thickness of the toothed floor.

As a preferred technical solution: in a method of connecting the prefabricated concrete integral heat-free bridge slab wall and the sleeve floor, the distance between the end of the lap joint tooth and the edge of the plate body is 30-60mm, and the distance between the lap joint tooth and the step mouth is 10-20mm. The protruding length of the overlapping teeth is 20mm smaller than the width of the top surface of the corresponding slab bottom ladder wall; the length of each side of the reserved opening of the hidden column passing through the slab is 2-7mm longer than that of the section of the inner row of the externally extending concealed column; the U-shaped sleeve The tie piece partially closes the reserved opening of the concealed post.

The beneficial effects of the present invention are: adopting a method for connecting the prefabricated concrete integral athermal bridge slab wall and the sleeve floor, mainly solving the overall synergy performance of the prefabricated concrete sandwich wall, so that the overall synergy performance of the wall is good and energy-saving High; using the overall no thermal bridge technology and enhanced concealed column system, it can effectively cut off the thermal bridge and have good thermal insulation performance; significantly improve the seismic performance, greatly reduce the number of connectors, simplify construction, significantly improve its industrialization efficiency, and reduce resources and energy consumption; in addition, this connection method is suitable for dry work and full assembly of precast concrete structures.

Description of drawings

Fig. 1 is a schematic diagram of the connection method between the glyph assembled concrete integral athermal bridge slab wall and the socket floor slab;

Figure 2 is a schematic plan view of the prefabricated concrete integral athermal bridge slab wall;

Figure 3 is a schematic diagram of the facade of the prefabricated concrete integral athermal bridge slab wall;

Figure 4 is a schematic diagram of the assembled concrete overall athermal bridge slab wall looking up;

Fig. 5 is a schematic plan view of a toothed floor.

In the figure: 1 overall non-thermal bridge slab wall, 2 toothed floor slabs, 11 is the inner edge concrete layer, 12 is the outer edge concrete layer, 13 is the concrete middle rib, 14 is the inner row of hidden columns, 15 is the outer row of hidden columns, 16 is the inner row of insulation boards, 17 is the outer row of insulation boards, 18 is the inner row of connecting steel bars, 19 is the outer row of connecting steel bars, 110 is the ladder mouth, 111 is the top surface of the bottom ladder wall, and 112 is the top surface of the board top ladder wall , 113 is the inner row of hidden columns extending outward, 114 is the bottom of the wall, 115 is the waterproof step opening, 116 is the interface of the inner row of steel bars, 117 is the interface of the outer row of steel bars, 21 is the board body, 22 is the overlapping teeth, and 23 is the overpass Plate concealed column reserved opening, 24 are U-shaped sleeve draw tie parts.

detailed description

In order to better explain the purpose and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings.

A prefabricated concrete overall athermal bridge slab wall and socket floor connection node, including the overall athermal bridge slab wall 1 and toothed floor 2 two parts;

The overall athermal bridge slab wall 1 includes an inner edge concrete layer 11, an outer edge concrete layer 12, a concrete middle rib 33, an inner row of hidden columns 14, an outer row of hidden columns 15, an inner row of insulation boards 16, and an outer row of insulation boards. (17), the inner row of connecting steel bars 18, the outer row of connecting steel bars 19, the step opening 110, the waterproof step opening 115, the top surface of the stepped wall at the bottom of the board 111, the top surface of the stepped wall at the top of the board 112, the inner row of externally extending concealed columns 113 and the bottom surface of the wall 114; the wall from front to back is the inner edge concrete layer 11, the inner row of insulation boards 16, the concrete middle rib 13, the step opening 110, the outer row of insulation boards 17, the waterproof step opening 115 and the outer edge concrete layer 12; the inner row The insulation boards 16 and the outer insulation boards 17 are arranged at intervals of 100-200 mm in width, and the inner row of concealed columns 14 and the outer row of concealed columns 15 are respectively inserted in the intervals; the inner row of concealed columns 14 and the outer row of concealed columns 15 are embedded The inner row of connecting reinforcement bars 18 and the outer row of connecting reinforcement bars 19.

The toothed floor slab 2 includes a plate body 21, overlapping teeth 22, a reserved opening 23 for passing through the concealed column and a U-shaped sleeve tie piece 24; The openings 23 are distributed alternately, and a U-shaped sleeve opening tie piece 24 is arranged above the opening 23 reserved for the hidden column of the pass board.

A method for connecting a prefabricated concrete integral heat-free bridge slab wall to a slotted floor slab, wherein the reserved openings (23) of the upper end of the tooth-shaped floor slab (2) are in one-to-one correspondence with the inner row of hidden columns (14) and fitted together , the inner row of hidden columns (14) embedded with the inner row of connecting steel bars (18) are exposed; the overlapping teeth (22) of the toothed floor (2) and the inner row of hidden columns (14) ) between the walls are overlapped, and the U-shaped sleeve tie (24) is adjacent to the step opening (110); The top surface forms a contour plane as a whole, and the inner row of concealed columns (14) is consistent with the bottom plane of the toothed floor slab (2).

In the connection node between the prefabricated concrete integral heat-free bridge slab wall and the socket floor, the inner concrete layer 11, the outer concrete layer 12 and the concrete middle rib 13 have the same thickness.

In the connection node between the assembled concrete integral athermal bridge slab wall and the sleeve floor, the inner row of hidden columns 14 and the outer row of hidden columns 15 are interlaced, and the inner row of hidden columns (14) and the outer row of thermal insulation boards (17 ) is corresponding to the middle part, and the outer row of hidden columns (15) is corresponding to the middle part of the inner row of insulation boards (16).

In the connection node between the prefabricated concrete integral thermal-free bridge slab wall and the socket floor, the step opening 110 is located at the centerline of the integral thermal-free bridge slab wall 1 , the outer side is higher than the inner side, and the height difference is that of the tooth-shaped floor 2 Thickness 100-200mm.

In the connection node between the prefabricated concrete integral thermal bridge slab wall and the socket floor, the corresponding positions of the inner row of connecting steel bars 18 and the outer row of connecting steel bars 19 are respectively provided with an inner row of connecting steel bar interface 116 and an outer row of connecting steel bars Interface 117; the extension length of the inner row of connecting reinforcement bars 18 and the outer row of connecting reinforcement bars 19 is equal to 200-500mm; the extension length of the inner row of concealed columns 14 is equal to the thickness of the toothed floor 2.

The method for connecting the prefabricated concrete integral heat-free bridge slab wall and the socket floor, wherein the end of the overlapping tooth 22 is 30-60mm away from the edge of the plate body 21, and the distance between the overlapping tooth 22 and the step opening 110 is 10-20mm, The protruding length of the overlapping teeth 22 is 20mm smaller than the width of the top surface 111 of the corresponding board bottom ladder wall; the length of each side of the reserved opening 23 of the hidden column of the board is 2-7mm longer than that of the section of the inner row of the hidden column 113; The U-shaped sleeve pull-knot part 24 partially seals the reserved opening 23 of the concealed post.

Finally, it should be noted that the above embodiments are only used for supplementary illustration of the technical solution of the present invention rather than limitation. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications or equivalent replacements to the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention, and they all should be included in the scope of the present invention. within the scope of the claims.

Claims (7)

1. an assembly concrete entirety is connected node without heat bridge board wall with running-on floor, it is characterised in that: include overall nothing Heat bridge board wall (1) and dentation floor (2) two parts；

Described entirety includes inner edge concrete layer (11), outer rim concrete layer (12), concrete middle rib without heat bridge board wall (1) (3), interior row's sleeper (14), outer row's sleeper (15), interior row's warming plate (16), outer row's warming plate (17), interior row connect reinforcing bar (18), Outer row connects ladder wall end face (111) at the bottom of reinforcing bar (19), ladder mouth (110), waterproof ladder mouth (115), plate, ladder wall top, plate top Face (112), interior exclusive stretch sleeper (113) and wall bottom surface (114)；Body of wall be followed successively by from front to back inner edge concrete layer (11), Interior row's warming plate (16), concrete middle rib (13), ladder mouth (110), outer row's warming plate (17), waterproof ladder mouth (115) and outer Edge concrete layer (12)；Interior row's warming plate (16) and outer layer warming plate (17) are all arranged according to 100-200mm width interval, interval Place is inserted with interior row's sleeper (14) and outer row's sleeper (15) respectively；Interior row's sleeper (14) and outer row's sleeper (15) are respectively embedded into interior row Connect reinforcing bar (18) and outer row connects reinforcing bar (19)；

Described dentation floor (2) includes plate body (21), overlap joint tooth (22), crosses plate sleeper reserved opening (23) and U-shaped running-on drawknot Part (24)；Plate body (21) upper end overlap joint tooth (22) and excessively plate sleeper reserved opening (23) distribute alternately, and cross plate sleeper reserved opening (23) It is arranged over U-shaped running-on tension member (24).

2. an assembly concrete entirety is without heat bridge board wall and running-on floor method of attachment, it is characterised in that: dentation floor (2) Upper end cross plate sleeper reserved opening (23) and interior row's sleeper (14) one_to_one corresponding and chimeric, be embedded with interior row and connect the interior of reinforcing bar (18) Row's sleeper (14) is exposed；Between the overlap joint tooth (22) of dentation floor (2) and entirety are without interior row's sleeper (14) of heat bridge board wall (1) Body of wall overlaps mutually, and U-shaped running-on tension member (24) is adjacent with ladder mouth (110)；After overlap joint, overall without heat bridge board wall (1) and dentation The end face of floor (2) is integrally formed contour plane, and interior row's sleeper (14) is consistent with dentation floor (2) plate baseplane.

A kind of assembly concrete entirety the most according to claim 1 is connected node without heat bridge board wall with running-on floor, its It is characterised by: the thickness of inner edge concrete layer (11), outer rim concrete layer (12) and concrete middle rib (13) is equal.

A kind of assembly concrete entirety the most according to claim 1 without the connection node of heat bridge board wall Yu running-on floor, It is characterized in that: interior row's sleeper (14) is interlaced with outer row's sleeper (15), interior row's sleeper (14) and outer row's warming plate (17) Middle part is corresponding, and outer row's sleeper (15) is corresponding with the middle part of interior row's warming plate (16).

A kind of assembly concrete entirety the most according to claim 1 is connected node without heat bridge board wall with running-on floor, its Being characterised by: ladder mouth (110) is positioned at the overall midline position without heat bridge board wall (1), outside is higher than inner side, and difference in height is dentation The thickness 100-200mm of floor (2).

A kind of assembly concrete entirety the most according to claim 1 is connected node without heat bridge board wall with running-on floor, its It is characterised by: interior row connects reinforcing bar (18) and outer row connects reinforcing bar (19) opposite position and is respectively equipped with interior row and connects reinforcing bar interface And outer row connects reinforcing bar interface (117) (116)；Interior row connects reinforcing bar (18) and outer row connects the length phase that reinforcing bar (19) stretches out Deng, for 200-500mm；The length that interior row's sleeper (14) is overhanging is equal with the thickness of dentation floor (2).

A kind of assembly concrete entirety the most according to claim 2 without heat bridge board wall and running-on floor method of attachment, its It is characterised by: overlap joint tooth (22) end is away from plate body (21) edge 30-60mm, and overlap joint tooth (22) and ladder mouth (110) are at a distance of 10- 20mm, the extension of overlap joint tooth (22) is than the little 20mm of width of ladder wall end face (111) at the bottom of corresponding plate；Cross plate sleeper to reserve The exclusive cross section big 2-7mm of each length of side stretching sleeper (113) in mouth (23) each side ratio；U-shaped running-on tension member (24) is by dark for plate Post reserved opening (23) is partially enclosed.