CN103835403B - Covered with Angles silk screen Mortar Plates T-shaped frame foamed concrete bearing wall and the practice - Google Patents

Abstract

The invention relates to a load-bearing wall of foamed concrete with a T-shaped frame of an outsourcing steel wire mesh mortar board and a method thereof. The wall is mainly composed of T-shaped reinforced concrete frame columns, steel wire mesh cement mortar boards, lightweight foamed concrete walls, It is composed of connectors, concrete, horizontally distributed steel bars, concealed columns, and high-polymer mortar. The steel wire mesh mortar board of the present invention has high strength and strong permeability resistance, can significantly improve the overall strength and durability of the wall, and at the same time, it can be used as an external template to avoid disassembly; the mortar board at the corner of the wall is integrally formed and connected by high-polymer mortar to improve the wall. The integrity of the body effectively enhances the seismic performance of the wall; the concealed columns are as thick as the wall, avoiding column flutes, and at the same time saving the building area; through the effective connection of concealed columns, horizontally distributed steel bars on the wall, and prefabricated connectors, Improve the overall seismic performance of the wall.

Description

Outsourcing steel wire mesh mortar board T-shaped frame foam concrete load-bearing wall and its practice

technical field

The invention relates to a foam concrete load-bearing wall with a T-shaped frame of an outsourcing steel wire mesh mortar board and a method thereof, belonging to the technical field of building energy conservation.

Background technique

With the acceleration of my country's modernization process, the construction of various social infrastructures is in the ascendant. Architecture requires not only safety and functionality, but also sufficient durability. By the end of this century, 50% of the existing buildings in our country will enter the aging stage, that is to say, 2.34 billion ^m2 of buildings will face durability problems. Therefore, how to improve the durability of buildings has always been a hot issue in current research.

At the same time, with the rapid development of my country's economy, new requirements have been put forward for the field of energy-saving buildings. By the end of the "Twelfth Five-Year Plan" period, the energy-saving capacity of buildings has reached 116 million tons of standard coal. Among them, the development of green buildings, the strengthening of energy-saving work in new buildings, and the formation of energy-saving capacity of 45 million tons of standard coal; the deepening of the reform of the heating system, the comprehensive implementation of heating metering charges, and the promotion of heating metering and energy-saving renovation of existing buildings in northern heating areas, forming 27 million Tonne of standard coal energy-saving capacity; strengthen the construction of public building energy-saving supervision system, promote energy-saving renovation and operation management, and form an energy-saving capacity of 14 million tons of standard coal. It can be seen that the energy-saving task of new residential buildings is very heavy. It is estimated that by the end of 2020, the national housing construction area will reach 68.6 billion square meters, of which 42.5 billion square meters are low-rise and multi-storey buildings. The task of energy conservation in low-rise and multi-storey buildings is very arduous.

The durability and overall seismic performance of traditional multi-layer masonry structures are generally poor. However, due to the limitation of the thickness of the wall and the reinforcement structure of the high-rise residential shear wall structure, there are problems such as high cost, thick wall and difficult promotion in the direct application of multi-layer shear wall structure. Based on this, the present invention proposes a simplified reinforcement, which is easy to construct, replaces traditional templates with steel mesh mortar boards, and replaces traditional masonry walls with cast-in-place foamed lightweight concrete walls. It is durable, energy-saving and earthquake-resistant, and is suitable for New structural systems for low-rise buildings.

Contents of the invention

The object of the present invention is to provide a kind of outsourcing steel wire mesh mortar board T-shaped frame foam concrete load-bearing wall with the advantages of simple structure, low cost, convenient construction, durability, energy saving and anti-seismic integration, and its method, in order to effectively solve the traditional low, multiple There are many problems such as poor durability, poor thermal insulation performance, and weak earthquake resistance of multi-storey buildings.

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

A load-bearing wall of foamed concrete with a T-shaped frame of an outsourcing steel mesh mortar board. Composed of horizontally distributed steel bars, concealed columns, and high-polymer mortar;

The T-shaped reinforced concrete frame column is placed at the junction of the vertical and horizontal walls, and the middle layer is composed of four reinforced concrete concealed columns, and the reinforced concrete concealed columns are connected by horizontally distributed steel bars along the direction parallel to the ground. Reinforced concrete concealed columns are respectively located at the end of the longitudinal wall, the end of the transverse wall and the junction of the two vertical and horizontal walls; the outer layer of the T-shaped reinforced concrete frame column is all covered with steel wire mesh cement mortar board; the T-shaped reinforced concrete frame The inside of the column is provided with a steel skeleton and poured with concrete, thus forming four hidden columns in one piece.

The lightweight foamed concrete wall is located in the middle of the T-shaped reinforced concrete frame columns on both sides, and the two ends are steel mesh cement mortar boards of T-shaped reinforced concrete frame columns, and steel wires are arranged on both sides of the lightweight foamed concrete wall. The mesh cement mortar board is filled with lightweight foamed concrete, and the steel mesh cement mortar boards on both sides of the lightweight foamed concrete wall are connected by prefabricated connectors;

The horizontally distributed steel bars are placed in the middle of the T-shaped steel frame column and the lightweight foamed concrete wall and connected with the hidden column stirrup; the joints between the steel wire mesh cement mortar boards are bonded with high polymer mortar.

The length or width of the steel mesh cement mortar board is 50mm, 150mm, 300mm or 600mm, and the thickness is 20-25mm.

The steel wire mesh cement mortar board has a steel wire dense mesh inside as a reinforcement skeleton.

The outer surface of the steel wire mesh cement mortar board is a throwing plane, and the inner surface is a rough surface, and the steel wire mesh cement mortar board maintains staggered joints when erected.

The high-polymer mortar provides flexible bonding for the connection between the steel mesh cement mortar boards, and the thickness of the high-polymer mortar is not more than 5mm.

The prefabricated connectors are screw rods or steel bar trusses. When screw rods are used for connection, the material of the screw rods is stainless steel, positioned 150-200mm from the edge of the frame column, the horizontal spacing is 300-400mm, and the vertical spacing is 400-500mm; When the steel bar truss is connected, the steel bar adopts the HPB300 model, and the angle between the steel bar and the horizontal line is 45°. , Arranged at equal intervals, the horizontal spacing is 250-300mm, and the vertical spacing is 400-500mm.

The horizontally distributed steel bars adopt HRB335 or HRB400 steel bars; when the seismic intensity is not greater than 7 degrees, the diameter of the horizontally distributed steel bars is 6 mm to 8 mm, and the spacing is 400 to 500 mm; when the seismic intensity is greater than 7 degrees and not greater than 8 degrees, the horizontal The diameter of the distributed steel bars is 12mm to 14mm, and the spacing is 400 to 500mm.

The longitudinal reinforcement of the concealed column adopts HRB335 grade or HRB400 grade reinforcement, with a diameter of 12 mm to 14 mm; the diameter of the stirrup is 8 mm to 10 mm, and the distance between the stirrups is 150 mm.

The concrete in the T-shaped reinforced concrete frame column is ordinary concrete or recycled concrete; if it is recycled concrete, it shall be replaced with the standard coarse aggregate replacement rate, and the replacement rate shall not exceed 30%.

The method of making the above-mentioned outsourcing steel wire mesh mortar board T-shaped frame foam concrete load-bearing wall is as follows:

Step 1: Insert the steel skeleton of the reinforced concrete concealed column into the foundation beam according to the size, and pour the reinforced concrete of the foundation beam;

Step 2: Make the upper surface of the foundation beam according to the plane size of the house, measure and set out the wires, level the upper surface of the foundation beam, and pop out the double solid line according to the thickness of the steel mesh cement mortar board;

Step 3: Lap the steel wire mesh cement mortar boards for lapping. The steel wire mesh cement mortar boards are bonded with high-polymer mortar. At the same time, drill holes for the steel wire mesh cement mortar boards at the wall and add prefabricated connectors;

Step 4: Arrange horizontally distributed steel bars on the top of each steel wire mesh cement mortar board along the wall height, and bind horizontally distributed steel bars at the ends of the longitudinal and transverse walls in the middle of the stirrup sides of adjacent reinforced concrete concealed columns, so that Reinforced concrete concealed columns are connected to form a whole;

Step 5: In the T-shaped junction of vertical and horizontal walls, pour ordinary concrete or recycled concrete in the frame surrounded by steel mesh mortar boards to form a T-shaped reinforced concrete frame column wrapped with steel mesh mortar boards; In-situ lightweight foamed concrete is poured into the cavity to form a lightweight foamed concrete wall.

Beneficial effect:

The foamed concrete load-bearing wall with a T-shaped frame of the outsourcing steel wire mesh mortar board of the present invention is suitable for multi-storey buildings in villages and towns. The corners of the wall are combined with concealed columns and horizontal tie bars, so the shear resistance is good. Concealed columns are as thick as the wall, saving construction area and avoiding column flutes. The total thickness of the wall is about 200mm, which greatly reduces the self-weight of the wall, reduces the inertial force, and improves the seismic performance. At the same time, the steel mesh mortar board with excellent durability and strength is used as the external formwork, which can not only avoid demolition, but also improve the overall durability and bearing capacity of the structure by about 25%.

Description of drawings

Fig. 1 is the foamed concrete load-bearing wall body of T-shaped frame of outsourcing steel wire mesh mortar board of the present invention;

Fig. 2 is a schematic diagram of prefabricated connectors;

Fig. 3 is a schematic diagram of reinforcement and structure of T-shaped reinforced concrete frame column;

Figure 4 is a schematic diagram of reinforced concrete concealed column reinforcement;

Fig. 5 is an elevation view of a foamed concrete load-bearing wall with a T-shaped frame of an outsourcing steel mesh mortar board of the present invention.

In the figure: 1-T-shaped reinforced concrete frame column, 2-steel mesh cement mortar board, 3-light foamed concrete wall, 4-prefabricated connector, 5-concrete, 6-horizontal distribution of steel bars, 7-concealed column , 8-high polymer mortar.

detailed description

The present invention will be further described below in conjunction with specific embodiment:

As shown in Figures 1-5, the T-shaped frame foam concrete load-bearing wall of the outsourcing steel mesh mortar board of the present invention includes a T-shaped reinforced concrete frame column 1, a steel wire mesh cement mortar board 2,

Lightweight foamed concrete walls 3, prefabricated connectors 4, concrete 5, horizontally distributed steel bars 6, concealed columns 7, and high-polymer mortar 8.

Specifically, the T-shaped reinforced concrete frame column 1 is placed at the junction of the vertical and horizontal walls, and the middle layer is composed of four reinforced concrete concealed columns 7, and the reinforced concrete concealed columns 7 are connected by horizontally distributed steel bars 6 along the direction parallel to the ground. The four reinforced concrete concealed columns 7 are respectively located at the end of the longitudinal wall, the end of the transverse wall and the intersection of the two vertical and horizontal walls, and the four reinforced concrete concealed columns 7 are connected by horizontally distributed steel bars 6, Enhancing the overall mechanical properties; the horizontally distributed steel bar 6 is placed in the middle of the T-shaped reinforced concrete frame column 1 and connected with the hidden column 7 stirrups. The T-shaped reinforced concrete frame column 1 is completely covered with steel mesh cement mortar board 2, which adopts the design of non-dismantling formwork, which realizes the integration of durability and energy saving. It is ordinary reinforced concrete or recycled concrete5.

The lightweight foamed concrete wall 3 is located in the middle of the reinforced concrete frame column 1 on both sides, and the two ends are steel mesh cement mortar boards 2 of the frame column 1. The position is connected by prefabricated connector 4, which plays the role of positioning and strengthening the connection. The connection form can be divided into screw connection and steel truss connection. The above structures together constitute an energy-saving load-bearing wall of foamed concrete with a T-shaped frame of an outsourcing steel mesh mortar board with excellent durability, heat preservation and earthquake resistance.

The T-shaped reinforced concrete frame column 1 is the load-bearing body, and the cast-in-place lightweight foamed concrete wall 3 is the first anti-seismic defense line for energy dissipation and shock absorption; the T-shaped reinforced concrete frame column 1 is the second defense line and the lightweight cast-in-place wall Body synergy anti-seismic shock absorption; steel mesh cement mortar board 2 replaces the traditional formwork process and the leveling of the external mortar layer, greatly reducing the thickness of the wall, thereby improving the overall seismic performance of the wall, and at the same time as a well-constrained outer frame The bearing capacity of the wall is improved; the connection problem of the steel mesh cement mortar board 2 is solved by the cooperation of the high-polymer mortar and the prefabricated connector, and the integrity of the wall is improved; compared with the ordinary frame shear wall structure , the seismic bearing capacity is reduced, but there are multiple anti-seismic defense lines, and the ductility is good; the wall is light, and the seismic inertia force is small; the reinforcement is less, reducing material consumption and reducing the cost of the project; superior durability, energy dissipation and shock absorption The effect is good, the thermal insulation performance is good, and it is suitable for the development of industrialization.

The T-shaped reinforced concrete frame column 1 is located at the intersection of vertical and horizontal walls, and is composed of three reinforced concrete concealed columns 7 with simplified reinforcement, and the adjacent concealed columns 7 are connected horizontally by horizontal steel bars 6, and the outer frame is a steel wire mesh mortar board For restraint, the connection of the steel mesh cement mortar board is bonded with high-polymer mortar 8. The internal filling of the T-shaped reinforced concrete frame column 1 can be ordinary concrete or energy-saving and environmentally friendly recycled concrete, which enhances the horizontal load resistance of the frame column. , the seismic performance is improved.

The lightweight foamed concrete wall 3 is located in a cavity surrounded by steel mesh cement mortar boards 3 and is composed of horizontal tie bars 6 , foamed lightweight concrete, prefabricated connectors 4 and high polymer mortar 8 . During production, the steel wire mesh cement mortar board 2 is first assembled to form the outer frame of the wall along the building axis, and at the same time, prefabricated connectors 4 are added inside, which are installed in the cavity of the steel mesh mortar formwork along the height of the wall at the adjacent horizontal connection. The horizontally distributed steel bars 6 are lapped to the interior of the concealed column 7, and then lightweight foamed concrete is cast in-situ in the cavity of the outer frame to form an energy-saving load-bearing wall of foamed concrete with a T-shaped frame of an outer steel mesh mortar board.

The horizontally distributed reinforcing bars 6 can be of HRB335 grade or HRB400 grade; when the seismic intensity is not greater than 7 degrees, the diameter of the horizontally distributed reinforcing bars of the wall can be 6 mm to 8 mm, and the spacing

400-500mm; when the seismic intensity is greater than 7 degrees and not greater than 8 degrees, the diameter of the horizontally distributed reinforcement bars on the wall is 12mm-14mm, and the spacing is 400-500mm;

The longitudinal steel bars of the reinforced concrete concealed column 7 are HRB335 or HRB400 steel bars with a diameter of 12 mm to 14 mm; the diameter of the stirrups is 8 mm to 10 mm, and the distance between the stirrups is 150 mm.

The length and height of the steel mesh mortar board can be processed into the corresponding modulus, such as 50, 150, 300, 600mm, and the thickness is 20-25mm. The mortar is high-performance mortar, and there is a steel wire mesh inside as a steel skeleton. The connection of the steel mesh cement mortar board is mainly the bonding of high polymer mortar and the connection of prefabricated connectors. When processing the steel mesh mortar board, only the flat side is used as the outside of the pouring formwork, and the rough side is the inner surface of the pouring formwork, so as to effectively improve the bonding between the poured concrete and the steel mesh mortar board.

The high-polymer mortar 8 is a flexible connection of the steel mesh cement mortar board, and the thickness of the application is not more than 5mm, so as to facilitate rapid bonding and hardening, thereby overcoming the problem of erecting the steel mesh mortar formwork.

The connection form of the prefabricated connector 4 includes screw connection and steel truss connection. When screw connection is used, the material of the screw is stainless steel, and the positioning distance is 150-200mm from the edge of the frame column. The horizontal spacing is 300-400mm, and the vertical spacing is 400- 500mm; when steel truss links are used, the steel bar is HPB300, with a diameter of 8-10mm, and the angle between the steel bar and the horizontal line is 45°. , Arranged at equal intervals, the horizontal spacing is 250-300mm, and the vertical spacing is 400-500mm. The prefabricated connector 4 not only provides a reliable connection for the steel mesh mortar board, but also restrains the outward expansion of the steel wire mortar board module when pouring concrete (recycled concrete) and lightweight foamed concrete.

Its production method is as follows:

S1 inserts the reinforced concrete skeleton of the reinforced concrete concealed column 7 into the foundation beam according to the size, and pours the reinforced concrete of the foundation beam.

In S2, the upper surface of the foundation beam is read and set out according to the plane size of the house, the upper surface of the foundation beam is leveled, and the double solid line is popped out according to the thickness of the steel mesh cement mortar board 2.

In S3, the steel wire mesh cement mortar board 2 is lapped and built, and the steel wire mesh cement mortar board 2 is bonded with high-polymer mortar 8. At the same time, the steel wire mesh cement mortar board 2 is drilled on the wall, and prefabricated connectors 4 are added. .

S4 Arrange horizontally distributed steel bars 6 on the top of the steel wire mesh cement mortar board 2 along the height of the wall, and tie the horizontally distributed steel bars 6 to the middle of the stirrup side of the adjacent reinforced concrete concealed column 7 at the end of the vertical and horizontal walls, so that The reinforced concrete concealed columns 7 are connected to form a whole.

S5 In the T-shaped junction of the vertical and horizontal walls, ordinary concrete or recycled concrete is poured in the frame surrounded by the steel mesh cement mortar board 2 to form a T-shaped reinforced concrete frame column 1 wrapped with the steel mesh cement mortar board 2; Lightweight foamed concrete is cast in-situ in the cavity of the mortar board 2 to form a lightweight foamed concrete wall 3 .

The above is only a typical implementation case of the present invention, and the implementation of the present invention is not limited thereto.

Claims (1)

1. A method of outsourcing steel wire mesh cement mortar board T-shaped frame foamed concrete load-bearing wall, said body of wall is mainly composed of T-shaped reinforced concrete frame column (1), steel wire mesh cement mortar board (2), lightweight foam Composed of foam concrete walls (3), prefabricated connectors (4), concrete (5), horizontally distributed steel bars (6), concealed columns (7), and high-polymer mortar (8); The T-shaped reinforced concrete frame column (1) is placed at the junction of the vertical and horizontal walls, and the middle layer is composed of four reinforced concrete concealed columns (7), and each reinforced concrete concealed column (7) passes along the direction parallel to the ground Horizontally distributed steel bars (6) are connected, and the four reinforced concrete concealed columns (7) are respectively located at the end of the longitudinal wall, the end of the transverse wall and the junction of the two vertical and horizontal walls; the T-shaped reinforced concrete frame column (1) The outer layer is completely covered with steel mesh cement mortar boards (2); the T-shaped reinforced concrete frame column (1) is equipped with a steel skeleton and poured with concrete (5), thus forming four integrated hidden columns (7) ; The lightweight foamed concrete wall (3) is located in the middle of the T-shaped reinforced concrete frame column (1) on both sides, and the two ends are steel mesh cement mortar boards (2) of the T-shaped reinforced concrete frame column (1). Both sides of the lightweight foamed concrete wall (3) are provided with steel wire mesh cement mortar boards (2), and the interior is filled with lightweight foamed concrete, while the steel wire mesh cement mortar boards on both sides of the lightweight foamed concrete wall (3) The plates (2) are connected by prefabricated connectors (4); The horizontally distributed steel bars (6) are placed in the middle of the T-shaped steel frame column (1) and the lightweight foamed concrete wall (3) and connected with the stirrup of the concealed column (7); the steel wire mesh cement mortar board (2 ) are bonded with high-polymer mortar (8) at the junction; The steel mesh cement mortar board (2) has a length or width of 50mm, 150mm, 300mm or 600mm, and a thickness of 20-25mm; The steel wire mesh cement mortar board (2) has a steel wire dense mesh inside as a reinforcement skeleton; The outer surface of the steel mesh cement mortar board (2) is a throwing plane, and the inner surface is a rough surface, and the steel wire mesh cement mortar board (2) maintains a staggered joint when erecting; The high-polymer mortar (8) provides flexible bonding for the connection between the steel mesh cement mortar boards (2), and the thickness of the high-polymer mortar (8) is not more than 5mm; The prefabricated connectors (4) are screw rods or steel bar trusses. When screw rods are used for connection, the screw rods are made of stainless steel, positioned 150-200 mm from the edge of the frame column, and the horizontal spacing is 300-400 mm, and the vertical spacing is 400-500 mm. ; When steel truss links are used, the steel bars use the HPB300 model, the angle between the steel bars and the horizontal line is 45°, and they are arranged at equal intervals. The horizontal spacing is 250-300mm, and the vertical spacing is 400-500mm; The horizontally distributed reinforcement (6) adopts HRB335 grade or HRB400 grade reinforcement; when the seismic intensity is not greater than 7 degrees, the diameter of the horizontally distributed reinforcement is 6 mm to 8 mm, and the spacing is 400 to 500 mm; when the seismic intensity is greater than 7 degrees and not greater than 8 degrees , the diameter of the horizontally distributed steel bars is 12mm to 14mm, and the spacing is 400 to 500mm; The longitudinal steel bars of the concealed column (7) are HRB335 or HRB400 steel bars with a diameter of 12 mm to 14 mm; the diameter of the stirrups is 8 mm to 10 mm, and the distance between the stirrups is 150 mm; The concrete (5) in the T-shaped reinforced concrete frame column (1) is ordinary concrete or recycled concrete; if it is recycled concrete, it is replaced by the standard coarse aggregate replacement rate, and the replacement rate does not exceed 30%; It is characterized in that the production method is as follows: Step 1: inserting the reinforced concrete skeleton of the reinforced concrete concealed column (7) into the foundation beam according to the size, and pouring the reinforced concrete of the foundation beam; Step 2: The upper surface of the foundation beam is read and set out according to the plane size of the house, the upper surface of the foundation beam is leveled, and the double solid line is popped out according to the thickness of the steel wire mesh cement mortar board (2); Step 3: Lap the steel wire mesh cement mortar board (2) for lapping, the steel wire mesh cement mortar board (2) is bonded with high polymer mortar, and at the same time drill the steel wire mesh cement mortar board (2) at the wall , add prefabricated connectors (4); Step 4: Arrange horizontally distributed steel bars (6) on the top of each steel wire mesh cement mortar board (2) along the wall height, and tie horizontally distributed steel bars (6) to adjacent reinforced concrete concealed columns at the ends of the longitudinal and transverse walls In the middle of the stirrup side of (7), the reinforced concrete concealed column (7) is connected into a whole; Step 5: Pour ordinary concrete or recycled concrete in the frame surrounded by the steel wire mesh mortar board (2) at the T-shaped junction of the vertical and horizontal walls to form a T-shaped reinforced concrete frame column (1) with a steel wire mesh mortar board; Lightweight foamed concrete is cast in-situ in the cavity of the steel wire mesh cement mortar board (2) to form a lightweight foamed concrete wall (3).