CN111749366A - A kind of prefabricated composite wall based on steel pipe and its construction method - Google Patents

Abstract

The invention discloses a steel pipe-based prefabricated composite wall and a construction method thereof, comprising prefabricated wall panels, which are arranged on foundation beams; The wall skeleton adopts a rib lattice structure formed by splicing a plurality of steel pipes, and the rib lattice structure is filled with blocks; the wall body connectors are evenly arranged at the bottom end of the prefabricated wall panels, and the wall body connectors are arranged on the rib columns and ribs of the prefabricated wall panels. At the node of the beam; the foundation embedded parts are embedded at the top of the foundation beam, and the wall connecting parts and the foundation embedded parts are connected by high-strength bolts; the present invention makes full use of the steel pipe's resistance to The advantages of good tensile and compressive performance and strong compressive capacity of concrete effectively improve the bearing capacity and seismic performance of the prefabricated composite wall; the prefabricated wall panels are connected by high-strength bolts between the wall connectors and the foundation embedded parts. The dry connection of the basic horizontal seam has high stability.

Description

A kind of prefabricated composite wall based on steel pipe and its construction method

technical field

The invention belongs to the technical field of civil engineering, and particularly relates to a steel pipe-based prefabricated composite wall and a construction method thereof.

Background technique

Prefabricated building is a type of building produced in factories and installed on site. It has the advantages of high quality components, large-scale production, high resource utilization, low environmental pollution, fast installation speed, low engineering cost and high engineering quality. The rib lattice of the traditional multi-rib composite wall is made of reinforced concrete. Due to the small section size of the reinforced concrete rib lattice and the small diameter of the steel bars, the vertical and horizontal bearing capacity of the traditional multi-rib composite wall is low. It cannot be used in high-rise buildings. So far, most traditional multi-ribbed composite walls are only used in multi-storey civil buildings.

SUMMARY OF THE INVENTION

Aiming at the technical problems existing in the prior art, the present invention provides an assembled composite wall based on steel pipes and a construction method thereof, so as to solve the problem that the vertical and horizontal bearing capacities of the existing multi-ribbed composite wall are low, and the key to the composite wall is Technical issues with unclear design of node connections.

To achieve the above object, the technical scheme adopted in the present invention is:

The invention provides an assembled composite wall based on steel pipes, comprising prefabricated wall panels, wall connectors and foundation embedded parts, the prefabricated wall panels are arranged on the foundation beams; the prefabricated wall panels include a steel tube composite wall skeleton, blocks and Concrete outer cladding, the steel tube composite wall skeleton adopts a rib lattice structure formed by splicing multiple steel pipes, the rib lattice structure is filled with blocks, and the concrete outer cladding is wrapped on the outside of the rib lattice structure;

The wall connector is evenly arranged at the bottom end of the prefabricated wall panel, and is placed at the node of the rib column and the rib beam of the prefabricated wall panel; the foundation embedded part is embedded at the top of the foundation beam, and the wall connector and the foundation embedded part High-strength bolts are used to connect them.

Further, the wall connecting piece includes a rectangular frame and two connecting plates; the rectangular frame is formed by enclosing four rectangular plates, the upper top plate of the rectangular frame is fixedly connected with the bottom end of the rib column of the prefabricated wall plate; the lower bottom plate of the rectangular frame is connected to the prefabricated The bottom ends of the wall panels are flush; the side panels of the rectangular frame are fixedly connected with the rib beams of the prefabricated wall panels; the two connecting panels are vertically arranged in parallel at both ends of the rectangular frame; a number of bolt through holes are evenly arranged in the wall body connectors , the high-strength bolts penetrate through the bolt through holes and are fixedly connected to the foundation embedded parts.

Further, the rectangular frame is filled with self-compacting concrete.

Further, the basic embedded parts include two wall splicing boards, an embedded part board and a number of anchoring steel bars; the two wall splicing boards are vertically parallel arranged, and the wall body connecting piece is clamped between the two wall splicing boards, High-strength bolts are used to fix the connection between the wall connector and the wall splicing plate; the embedded plate is horizontally arranged at the top of the foundation beam, and the lower end of the wall splicing plate is fixedly connected to the upper surface of the embedded plate; several anchoring steel bars are vertically uniform It is arranged below the embedded plate, the upper end of the anchoring steel bar is fixedly connected with the lower surface of the embedded plate, and the lower end is embedded in the foundation beam.

Further, the steel tube composite wall skeleton includes two side rib columns, several middle rib columns, upper side rib beams, lower side rib beams and several middle rib beams;

The two side rib columns are arranged vertically in parallel, and a number of middle rib columns are vertically spaced between the two side rib columns; the upper rib beam is fixed horizontally at the top of the side rib column and the middle rib column, and the lower rib beam is fixed horizontally at the top of the side rib column and the middle rib column. Between two adjacent wall connectors, a number of middle rib beams are arranged at horizontal intervals between the upper side rib beam and the lower side rib beam;

The wall connector is arranged at the node of the side rib column or the middle rib column and the lower rib beam, the upper end of the wall connector is fixedly connected with the bottom end of the side rib column or the middle rib column, and the side wall of the wall connector is The rib beam is fixedly connected; the side rib column, the middle rib column, the upper rib beam, the lower rib beam and the middle rib beam are all made of circular steel pipe or rectangular steel pipe, and the top of the side rib column and the middle rib column is provided with the rib column end plate.

Further, the wall thickness of the side rib column and the middle rib column shall not be less than the wall thickness of the upper side rib beam, the lower side rib beam and the middle rib beam; the outer diameter of the side rib column and the middle rib column shall not be less than outer diameter.

Further, the side rib column and the middle rib column are arranged in a full length; at the intersection of the upper side rib beam, the lower side rib beam and the middle rib beam and the middle rib column, the upper side rib beam, the lower side rib beam and the middle rib beam are disconnected.

Further, the web of the rectangular steel pipe is parallel to the surface of the prefabricated wall panel, and circular or elliptical through holes are uniformly arranged on the web of the rectangular steel pipe.

Further, the blocks are air-entrained concrete blocks; a mortar layer is arranged between the prefabricated wall panels and the foundation beams.

The present invention also provides a construction method for the fabricated composite wall based on steel pipes, comprising the following steps:

Step 1. According to the design results, make the steel pipe composite wall skeleton and wall reinforcement. After assembling the template, put the steel pipe composite wall skeleton, wall reinforcement and blocks into and set the position, and install the wall connector at the preset position. Then pour concrete and maintain it; embed the foundation embedded parts in the foundation beams accordingly;

Step 2. After the maintenance of the prefabricated wallboard is completed, remove the formwork, lay the mortar layer at the position of the base beam corresponding to the bottom end of the prefabricated wallboard, and hoist the wallboard to the correct position, connect the wall connector in the prefabricated wallboard to the foundation. The foundation embedded parts in the beam are connected with high-strength bolts.

Compared with the prior art, the beneficial effects of the present invention are:

The steel pipe-based prefabricated composite wall described in the present invention forms a steel-tube composite wall skeleton by splicing a plurality of steel tubes, and replaces the steel bar as the profiled steel skeleton in the prefabricated composite wall rib; The synergistic effect of the composite wall makes full use of the advantages of better tensile and compressive performance of steel pipe and strong compressive capacity of concrete, effectively improving the bearing capacity and seismic performance of the prefabricated composite wall; its fire resistance and durability are better than steel structures. Components; by arranging wall connectors and foundation embedded parts at the bottom of the prefabricated wall panels, and using high-strength bolts to connect the wall connectors and foundation embedded parts, the dry connection of the horizontal joints of the prefabricated wall panel foundation is realized, and the assembly The process is simple, the stability is high, and the production and assembly process is simple.

Further, the wall connector adopts a combination of a rectangular frame and two connecting plates, which is a cuboid node composed of six plates. Each plate of the cuboid node is mutually restrained and supported, which can well improve the bearing capacity of the node and effectively. The mechanical performance and durability of the nodes are enhanced.

Further, by filling the rectangular frame with self-compacting fine stone concrete, the thickness of the beam rectangular frame and the connecting plate is effectively reduced, and the amount of steel used is saved; the interaction between the rectangular frame, the connecting plate and the self-compacting concrete is fully utilized. The advantages of steel and concrete enable joints to effectively exert their connection performance, with strong bearing capacity, durability and fire resistance.

Further, the foundation embedded parts are fixed in the foundation beams through the embedded anchor bars, which effectively improves the installation speed of the prefabricated wall panels. The vertical pressure between the prefabricated wall panels and the foundation beams effectively transmits the tension and shear force between the prefabricated wall panels and the foundation beams; the prefabricated wall panels and the foundation beams are connected by the foundation embedded parts and the wall connection parts As a whole, the assembly speed is fast and the stability is high; the wall connector also has the characteristics of being easy to connect with adjacent steel components, has a good connection operation space, and the connection performance is stable and reliable.

Further, the steel pipe composite wall skeleton is formed by assembling and welding multiple round steel pipes or rectangular steel pipes. The steel pipe composite wall skeleton has good ductility and high bearing capacity; It reduces the difficulty of concrete pouring and effectively reduces the self-weight of the prefabricated composite wall; at the same time, it effectively improves the thermal insulation performance of the wall, and has better fire resistance and durability; compared with the reinforced concrete composite wall, the steel pipe prefabricated composite wall The bearing capacity and seismic performance of the wall are significantly improved, and with the increase of the number of construction layers, the decline in the project cost also becomes larger.

Further, the wall thickness and outer diameter of the rib column are not less than the wall thickness and outer diameter of the rib beam, which conforms to the design principle of strong column and weak beam, and makes the rib beam have enough space to weld on the rib column, effectively improving the wall. Structural stability and strength.

Further, by setting circular or oval through holes on the web of the rectangular steel pipe, it is convenient for concrete pouring; the concrete is filled in the rectangular steel pipe, the steel hoop restraint effect of the steel pipe on the concrete is effectively utilized, and the prefabricated composite structure can be significantly improved. bearing capacity of the wall.

Further, the blocks are made of air-entrained concrete blocks, and recycled aggregate concrete is used to replace traditional concrete materials, which effectively alleviates the consumption of raw materials and the recycling of some construction wastes.

Further, by setting a grouting layer between the prefabricated wall panel and the foundation beam, the balance of the pressure on the wall is ensured, the reliability of the connection is effectively increased, and the phenomenon of penetration at the bottom of the wall is effectively avoided.

The steel pipe-based prefabricated composite wall and its manufacturing method described in the present invention have the advantages of precise component manufacturing quality, large-scale production, high resource utilization rate, little environmental pollution, simple manufacturing process, fast installation speed, and engineering cost. Low and high engineering quality advantages.

Description of drawings

1 is a schematic diagram of the overall structure of the fabricated composite wall based on steel pipes according to the present invention;

Fig. 2 is the structural schematic diagram of the wall body connector in the steel pipe-based prefabricated composite wall according to the present invention;

3 is a schematic diagram of the fabrication process of the wall body connector in the steel pipe-based prefabricated composite wall according to the present invention;

Fig. 4 is the structural schematic diagram of the foundation embedded part in the steel pipe-based prefabricated composite wall of the present invention;

5 is a schematic diagram of the skeleton structure of the steel pipe composite wall described in Example 1;

6 is a schematic diagram of the skeleton structure of the steel pipe composite wall described in Example 2;

FIG. 7 is a schematic diagram of the skeleton structure of the steel pipe composite wall described in Example 3. FIG.

Among them, 1 prefabricated wall panels, 2 wall connectors, 3 foundation embedded parts, 4 foundation beams, 5 high-strength bolts; 11 steel pipe composite wall frame, 12 blocks; 111 side rib columns, 112 middle rib columns, 113 upper side ribs Beam, 114 lower rib beam, 115 middle rib beam, 116 rib column end plate; 21 rectangular frame, 22 connecting plate; 31 wall splicing plate, 32 embedded plate, 33 anchoring steel bar.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the following specific embodiments will further describe the present invention in detail. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

Example 1

As shown in Figures 1-5, this embodiment provides an assembled composite wall based on steel pipes, including a prefabricated wall panel 1, a wall body connector 2 and a foundation embedded component 3. The prefabricated wall panel 1 is arranged on the foundation beam 4. The prefabricated wall panel 1 includes a steel pipe composite wall skeleton 11, blocks 12 and a concrete outer cladding. The steel pipe composite wall skeleton 11 adopts a rib lattice structure formed by assembling and welding a plurality of steel pipes, and the rib lattice structure is filled with blocks 12. The concrete outer cladding is wrapped around the outside of the rib lattice structure, and the periphery of the block 12 is bonded with the concrete outer cladding. Preferably, the blocks 12 are air-entrained concrete blocks, and the air-entrained concrete blocks use recycled aggregate concrete to replace traditional concrete materials, effectively alleviating the consumption of raw materials and the recycling of some construction wastes.

The steel tube composite wall skeleton 11 includes two side rib columns 111, a number of middle rib columns 112, an upper side rib beam 113, a lower side rib beam 114 and a number of middle rib beams 115; 112 is vertically spaced between the two side rib columns 111; the upper side rib beam 113 is horizontally fixed on the top of the side rib column 111 and the middle rib column 112, and the lower side rib beam 114 is horizontally fixed on two adjacent wall connectors 2, a plurality of middle rib beams 115 are arranged horizontally between the upper side rib beam 113 and the lower side rib beam 114.

The wall body connector 2 is arranged at the node of the side rib column 111 or the middle rib column 112 and the lower side rib beam 114, the upper end of the wall body connector 2 is fixedly connected with the bottom end of the side rib column 111 or the middle rib column 112, and the wall body The side wall of the connector 2 is fixedly connected with the lower rib beam 114; The top end of the rib column 112 is provided with a rib column end plate 116 .

In this embodiment, the circular steel pipe column of the steel pipe composite wall skeleton is full length, the top of the circular steel pipe column is welded and sealed with the rib column end plate, and the circular steel pipe is not filled with concrete, which reduces the self-weight of the prefabricated composite wall; After the steel pipe is sealed, the internal air cannot circulate, so the heat cannot be effectively transferred, and its thermal insulation effect is also greatly improved; Therefore, the reasonable combination of circular steel pipe and concrete can give full play to the advantages of the two and make up for their respective shortcomings, so that the steel pipe-assembled composite wall has good ductility, good seismic performance, and its bearing capacity. , fire resistance and durability are better than steel structural members, with good economic benefits.

At the intersection of the circular steel pipe beam and the circular steel pipe column, the circular steel pipe is disconnected and set to realize the structural design principle of strong column and weak beam; the intersection line of the end of the circular steel pipe beam in the steel pipe composite wall skeleton It is cut by a wire cutting machine, which improves the assembly accuracy of the structure; the circular steel pipe beam and the circular steel pipe column are not filled with concrete, and can also be filled with corresponding materials according to the requirements of heat preservation, sound insulation and fire resistance.

In this embodiment, the steel pipe composite wall skeleton is welded by circular steel pipes in a factory. The circular steel pipes are not filled with concrete, which greatly reduces the self-weight of the wall and reduces the wall foundation. Since all the circular steel pipes of the shaped steel skeleton are sealed The thermal insulation performance of the composite wall is greatly improved; compared with the reinforced concrete composite wall, the bearing capacity and seismic performance of the round steel pipe prefabricated composite wall are significantly improved, and with the increase of the number of construction layers, the reduction of the project cost also becomes larger. .

The wall connector 2 is evenly arranged at the bottom end of the prefabricated wall panel 1, and the wall connector 2 is arranged at the intersection of the rib column and the lower rib beam of the prefabricated wall panel 1; the foundation embedded component 3 is embedded in the foundation beam 4. At the top, the foundation embedded parts 3 and the wall body connecting parts 2 are arranged in one-to-one correspondence, and the wall body connecting parts 2 and the foundation embedded parts 3 are connected by high-strength bolts.

The wall connector 2 includes a rectangular frame 21 and two connecting plates 22; the rectangular frame 21 is formed by enclosing four rectangular plates, and the upper top plate of the rectangular frame 21 is fixed to the bottom end of the side rib column or the middle rib column of the prefabricated wall panel 1 connection; the lower bottom plate of the rectangular frame 21 is flush with the bottom end of the prefabricated wall panel 1; the side panel of the rectangular frame 21 is fixedly connected with the lower rib beam of the prefabricated wall panel 1; The two ends of the connecting plate 22 and the end of the rectangular frame 21 are welded and fixed, the connecting plate 22 and the rectangular frame 21 are combined to form a hollow cuboid wall connector, and the thickness of the cuboid wall connector is less than the thickness of the prefabricated wall panel 1 ; Preferably, the rectangular frame 21 is filled with self-compacting concrete.

The basic embedded part 3 includes two wall splicing plates 31, an embedded part plate 32 and a number of anchoring steel bars 33; Between 31, the wall connector 2 and the wall splicing plate 31 are fixedly connected by high-strength bolts, and the connecting plate 22 and the wall splicing plate 31 are closely arranged; The thickness of the board 1 is matched to ensure that after the foundation embedded part 3 is spliced with the wall connecting part 2, the outer surface of the wall splicing board 31 is flush with the surface of the prefabricated wall board 1; the embedded part board 32 is horizontally arranged on the foundation beam 4 The bottom end of the wall splicing plate 31 is fixedly connected with the upper surface of the embedded part plate 32; a plurality of anchoring steel bars 33 are vertically evenly arranged below the embedded part plate 32, and the upper end of the anchoring steel bar 33 is connected with the lower surface of the embedded part plate 32. Fixed connection, the lower end is embedded in the foundation beam 4.

Among them, a number of fixing bolt holes are evenly arranged on the connecting plate 22, bolt holes are reserved in the self-compacting concrete filled in the rectangular frame 21, and the fixing bolt holes and the reserved bolt holes are correspondingly connected to form bolt through holes; Bolt fixing holes are evenly arranged, and the bolt through holes in the wall connector 2 are correspondingly arranged with the bolt fixing holes on the wall splicing plate 31; The wall body connectors 2 are fixedly connected together, thereby realizing the fixed connection of the wall body connectors 2 and the foundation embedded parts 3; There are four fixing bolt holes, and the four fixing bolt holes are correspondingly arranged up and down; two fixing bolt holes are arranged on the connecting plate of the wall connecting piece 2 arranged at the bottom end of the middle rib column 112, and the two fixing bolts are up and down. corresponding settings.

Production process

The manufacturing process of a prefabricated composite wall based on a circular steel pipe according to the present invention specifically includes the following steps:

Step 1. Prefabricated wall panel production

Prefabricated wall panels include concrete outer cladding, steel pipe composite wall skeleton, structural steel bars and aerated concrete blocks; first, make steel pipe composite wall skeleton and structural steel cage according to the design results, and then assemble the steel pipe composite wall skeleton, structural steel cage and add The air-concrete blocks are placed and positioned, and the wall connectors are installed at the preset positions, and then concrete is poured and cured;

Fabrication of foundation beams

Bind the reinforcing bars of the foundation beam, and after the formwork is supported, put the reinforcing bar cage of the foundation beam into the formwork, and place the foundation embedded parts in the corresponding position, and then pour concrete and cure and form.

Step 2. After the maintenance of the prefabricated wall panels and the foundation beams is completed, remove the formwork, and lay a 20mm thick slurry layer at the position of the foundation beams corresponding to the lower rib beams of the prefabricated wall panels to ensure that the prefabricated wall panels are in close contact with the foundation beams. After hoisting the wall panel in the correct position, connect the wall connector in the prefabricated wall panel and the foundation embedded part in the foundation beam with high-strength bolts.

Example 2

As shown in Figures 1-4 and 6, the structural design principle and manufacturing process of Example 2 and Example 1 are basically the same, the difference is that the side rib column 111, the middle rib column 112, The upper rib beam 113 , the lower rib beam 114 and the middle rib beam 115 are all made of rectangular steel pipes.

In this embodiment 2, the steel pipe composite wall skeleton is made by factory welding of rectangular steel pipes. By arranging rib column end plates at the ends of the rectangular steel pipes, the rectangular steel pipes in the steel pipe composite wall skeleton are all sealed structures. The internal air cannot be circulated, so the heat cannot be effectively transmitted, which effectively improves the thermal insulation effect of the prefabricated composite wall; by sealing the end of the rectangular steel pipe, it is ensured that the rectangular steel pipe is not filled with concrete, which greatly reduces the self-weight of the prefabricated wall panel, which can be The size of the foundation beam is reduced; compared with the circular steel tube composite skeleton, the bearing capacity of the rectangular steel tube composite wall skeleton with the same steel content is higher than the former, and its processing difficulty is also lower than the former.

Steel has good ductility and strong tensile and compressive resistance, while concrete has the characteristics of strong compressive resistance, fire resistance, high temperature resistance and corrosion resistance; therefore, a reasonable combination of rectangular steel pipe and concrete can give full play to the advantages of both and make up for Due to the shortcomings of the two, the steel pipe prefabricated composite wall has good ductility and good seismic performance, and its bearing capacity, fire resistance and durability are better than those of steel structural members, which has good economic benefits; it is composite with reinforced concrete. Compared with the wall, the bearing capacity and seismic performance of the rectangular steel pipe prefabricated composite wall are significantly improved, and with the continuous increase of the building height, the project cost reduction rate also increases; According to the requirements of heat preservation, sound insulation and fire resistance, the interior of the steel pipe can also be filled with corresponding materials; and then achieve the functions of heat preservation, sound insulation and fire resistance; To facilitate the pouring of concrete;

Example 3

As shown in Figures 1-4 and 7, the structural design principles and manufacturing processes of Embodiment 3 and Embodiment 2 are basically the same, except that the side rib columns 111, middle rib columns 112, The upper rib beam 113, the lower rib beam 114 and the middle rib beam 115 are all made of rectangular steel pipes, the webs of the rectangular steel pipes are parallel to the surface of the prefabricated wall panel 1, and the webs of the rectangular steel pipes are uniformly provided with circular or oval through holes.

In this embodiment 3, circular or elliptical through holes should be opened in the webs of the rectangular steel pipe beams and the rectangular steel pipe beams and columns according to the design requirements, so as to facilitate concrete pouring; it not only ensures the pouring quality of concrete when making wall panels, but also To a certain extent, the bonding strength between the profiled steel and the concrete is enhanced, and the bearing capacity of the wall is improved; in the pouring process, the rectangular steel pipe is filled with concrete to form a concrete-filled steel tubular structure, which effectively utilizes the steel hoop restraint effect of the steel pipe on the concrete, which can significantly improve the Bearing capacity of fabricated composite walls.

In this embodiment 3, circular or elliptical through holes are opened in the webs of the rectangular steel pipe beam and the rectangular steel pipe column, and the opening position of the hole should be located at the position where the bending moment of the rib column and the rib beam is small, and does not affect the cast-in-place The compactness of concrete; during the specific operation, the holes should be set near the inflection point of the rib column and rib beam, that is, for the rib column, when it is in the lowest rib lattice, its inflection point is far from the top of the rib column. It is 1/3 of the height of the rib column; when it is in other rib lattices, the inflection point is 1/2 of the height of the rib column and column; for rib beams, when it is in the rib lattice at the end of the compound wall, its inversion point The length of the rib beam is 2/3 away from the outer beam end of the rib beam; when it is in other rib grids, the inflection point is the midpoint of the length of the rib beam; the maximum diameter of the circular or oval through hole does not exceed the height of the rectangular steel pipe section. 70%, 50% of the section height of the rectangular steel pipe should be taken; by opening holes in the web of the rectangular steel pipe, it is not only convenient for pouring concrete, but also improves the bonding strength of the steel and concrete; it ensures that the damage of the rectangular steel pipe composite wall follows the The principle of "block-rib grid-frame frame (that is, the frame composed of side rib beams and side rib columns)" makes the damage of the composite wall belong to ductile damage, and has strong bearing capacity and seismic performance.

A steel pipe-based prefabricated composite wall and a construction method thereof according to the present invention are provided by arranging wall connectors in the area formed by the intersection of the rib column and the bottom rib beam of the prefabricated wall panel, and burying the foundation embedded parts. In the foundation beam, when the composite wall is connected with the foundation beam, the wall connector and the foundation embedded part are connected as a whole by high-strength bolts, so as to realize the dry fixed connection between the prefabricated composite wall and the foundation beam; filling in the rectangular frame When self-compacting concrete is used, the label of self-compacting fine stone concrete shall be determined by design, but shall not be lower than C40; when self-compacting concrete is poured, medium and thin-walled steel pipes of the same diameter shall be inserted into the corresponding positions of the fixing bolt holes on the connecting plate to prevent Leave the space for the bolt through holes, and ensure that the concrete is densely filled with the rectangular frame during the filling process; when the last connecting plate is welded on the rectangular frame, the strength of the inner filling concrete should reach 50% of the design strength, and the surface of the self-compacting concrete should be Apply mortar with a thickness of about 1 cm to ensure that the inner surface of the connecting plate is in close contact with the surface of the self-compacting concrete; in the present invention, the wall connecting piece and the adjacent steel pipe columns and steel pipe beams are fixed by welding.

A steel pipe-based prefabricated composite wall and its construction method according to the present invention, by arranging a wall connecting piece at the bottom node of a rib column, the wall connecting piece is filled with self-compacting fine stone concrete, a rectangular frame and a connecting piece The wall thickness of the plate can be designed to be very small, and the interaction between the rectangular frame, the connecting plate and the self-compacting concrete can fully exploit the respective advantages of steel and concrete, so that the joint can effectively exert its connection performance, with strong bearing capacity and durability, resistance. Fire performance; wall connectors can be easily connected to rib beams and rib columns through factory welds, the connection form is simple and reliable, and the force path is simple and clear; the wall is welded at the nodes by high-strength bolts and embedded parts. The connection of the wall splicing board on the board ensures the dry connection between the wall and the foundation beam on site, thereby improving the construction quality and increasing the construction speed; due to the small wall thickness of the wall connecting piece, the production difficulty is low, and the operation is possible. Strong performance, which greatly reduces the processing cost; the wall splicing board can be set within the thickness of the wall without affecting the decoration and decoration.

The above-mentioned embodiment is only one of the embodiments that can realize the technical solution of the present invention. The scope of protection claimed in the present invention is not only limited by this embodiment, but also included in the technical scope disclosed in the present invention. Anyone familiar with the present technology Variations, substitutions, and other implementations will readily occur to those skilled in the art.

Claims (10)

1. A prefabricated composite wall based on steel pipes, characterized in that it comprises a prefabricated wall panel (1), a wall body connector (2) and a foundation embedded part (3), and the prefabricated wall panel (1) is arranged on the foundation beam (4) Upper; the prefabricated wall panel (1) includes a steel pipe composite wall skeleton (11), blocks (12) and a concrete outer cladding, and the steel pipe composite wall skeleton (11) adopts a rib structure formed by splicing a plurality of steel pipes. The structure is filled with blocks (12), and the concrete outer cladding is wrapped on the outside of the rib structure; The wall body connector (2) is evenly arranged at the bottom end of the prefabricated wall panel (1), and is placed at the node of the rib column and the rib beam of the prefabricated wall panel (1); the foundation embedded part (3) is embedded in the foundation beam At the top of (4), high-strength bolts (5) are used to connect the wall connecting piece (2) and the foundation embedded piece (3). 2. A steel pipe-based prefabricated composite wall according to claim 1, wherein the wall body connector (2) comprises a rectangular frame (21) and two connecting plates (22); the rectangular frame (21) It is formed by enclosing four rectangular plates, the upper top plate of the rectangular frame (21) is fixedly connected with the bottom end of the rib column of the prefabricated wall panel (1); the lower bottom plate of the rectangular frame (21) is flat with the bottom end of the prefabricated wall panel (1). The side plates of the rectangular frame (21) are fixedly connected with the rib beams of the prefabricated wall panels (1); the two connecting plates (22) are vertically and parallelly arranged at both ends of the rectangular frame (21); the wall body connecting pieces (2) A plurality of bolt through holes are evenly arranged in the ), and the high-strength bolts penetrate through the bolt through holes and are fixedly connected with the foundation embedded parts (3). 3. A steel pipe-based prefabricated composite wall according to claim 2, wherein the rectangular frame (21) is filled with self-compacting concrete. 4. A steel pipe-based prefabricated composite wall according to claim 1, characterized in that the foundation embedded part (3) comprises two wall splicing boards (31), an embedded part board (32) and several Anchoring steel bars (33); two wall body splicing plates (31) are arranged vertically in parallel, the wall body connecting piece (2) is clamped between the two wall body splicing plates (31), and the wall body connecting piece (2) is connected to the The wall splicing plates (31) are fixedly connected by high-strength bolts (5); the embedded part plate (32) is horizontally arranged on the top of the foundation beam (4), and the lower end of the wall splicing plate (31) is connected to the embedded part plate (32). ) is fixedly connected to the upper surface of the embedded part plate (32); a number of anchoring steel bars (33) are evenly arranged vertically below the embedded part plate (32), the upper end of the anchoring steel bar (33) is fixedly connected with the lower surface of the embedded part plate (32), and the lower end is embedded in the embedded part plate (32). in the foundation beam (4). 5. A steel pipe-based prefabricated composite wall according to claim 1, wherein the steel pipe composite wall skeleton (11) comprises two side rib columns (111), several middle rib columns (112), an upper side rib beams (113), lower rib beams (114) and several middle rib beams (115); The two side rib columns (111) are vertically arranged in parallel, and a plurality of middle rib columns (112) are vertically spaced between the two side rib columns (111); the upper side rib beams (113) are horizontally and fixedly arranged on the side rib columns ( 111) and the top of the middle rib column (112), the lower rib beam (114) is horizontally fixed between the two adjacent wall connecting pieces (2), and a plurality of middle rib beams (115) are arranged at horizontal intervals on the upper side rib beam ( 113) and the lower rib beam (114); The wall body connector (2) is arranged at the node of the side rib column (111) or the middle rib column (112) and the lower side rib beam (114), and the upper end of the wall body connector (2) is connected to the side rib column (111) or The bottom end of the middle rib column (112) is fixedly connected, and the side wall of the wall body connecting member (2) is fixedly connected with the lower side rib beam (114); the side rib column (111), the middle rib column (112), the upper side rib beam ( 113), the lower rib beams (114) and the middle rib beams (115) are all made of circular steel pipes or rectangular steel pipes, and rib column end plates (116) are provided at the tops of the side rib columns (111) and the middle rib columns (112). 6. A steel pipe-based prefabricated composite wall according to claim 5, wherein the wall thickness of the side rib column (111) and the middle rib column (112) is not less than the upper side rib beam (113), the lower side rib The wall thickness of the beam (114) and the middle rib beam (115); the outer diameter of the side rib column (111) and the middle rib column (112) is not less than the upper side rib beam (113), the lower side rib beam (114) and the middle rib beam (115) outside diameter. 7. A steel pipe-based prefabricated composite wall according to claim 5, characterized in that, the side rib columns (111) and the middle rib columns (112) are arranged in a through length; the upper side rib beams (113), the lower side rib At the intersection of the beam (114), the middle rib beam (115) and the middle rib column (112), the upper side rib beam (113), the lower side rib beam (114) and the middle rib beam (115) are disconnected. 8. A steel pipe-based prefabricated composite wall according to claim 5, characterized in that the web of the rectangular steel pipe is parallel to the surface of the prefabricated wall panel (1), and the web of the rectangular steel pipe is evenly provided with circular or oval through holes. 9. A steel pipe-based prefabricated composite wall according to claim 1, wherein the blocks (12) are air-entrained concrete blocks; the prefabricated wall panels (1) and the foundation beams (4) are arranged between There is a mortar layer. 10. The construction method of a steel pipe-based prefabricated composite wall according to any one of claims 1-9, wherein the method comprises the following steps: Step 1. According to the design results, make the steel pipe composite wall skeleton and wall reinforcement. After assembling the template, put the steel pipe composite wall skeleton, wall reinforcement and blocks into and set the position, and install the wall connector at the preset position. Then pour concrete and maintain it; embed the foundation embedded parts in the foundation beams accordingly; Step 2. After the maintenance of the prefabricated wallboard is completed, remove the formwork, lay the mortar layer at the position of the base beam corresponding to the bottom end of the prefabricated wallboard, and hoist the wallboard to the correct position, connect the wall connector in the prefabricated wallboard to the foundation. The foundation embedded parts in the beam are connected with high-strength bolts.

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