The formwork not only acts as the reinforcement protective layer to participate in the stress, but also acts as the post pouring concrete formwork.

Recommended unit for assembling integral composite concrete structure system: Sany Construction Technology Co., Ltd.

The current landmarks or group standards that can be used for assembling integral composite concrete structures include: Technical Specification for assembling integral composite concrete structures dbj61 / t183, technical specification for assembling integral reinforced welded mesh composite concrete structures T / cecs579, and technical specification for waterproofing of underground works of assembled integral composite concrete structures T / cecs832.

Laminated column member 4 Typical connection node.

The front end of the vibrator shall be inserted into the previous layer of concrete, and the insertion depth shall not be less than 50mm; Vibration should be selected φ Small diameter high frequency vibrating rod of 30mm and below.

4 sandwich laminated exterior wall panel component 3 Superimposed column.

The composite shear wall uses two precast parts on the outside as the formwork, and the middle cast-in-place layer and the cast-in-place layer of the composite floor slab are poured at the same time.

The components are connected by reinforcement sleeve mechanical connection or indirect lap.

2.

Apply cavity laminated concrete components (double-sided laminated wall, laminated column, laminated beam, laminated plate, etc.) or formed reinforcement skeleton + shaped formwork.

This issue introduces the assembly of integral laminated concrete structure system.

Rebar Cross Chair

When the spacer is placed through the wall, the height of the spacer should be no less than 4 M.

As a type of concrete structure, the design and construction of assembled integral composite concrete structure should comply with the basic provisions in the current national standards general code for concrete structures gb55008, code for design of concrete structures GB50010, code for construction of concrete structures gb50666 and code for acceptance of construction quality of concrete structures GB50204.

3.

The self weight of structural members is lighter..

After the laminated wall is installed in place, the horizontal connecting reinforcement shall be placed in the wall cavity first, then the reinforcement at the post cast concrete part of the edge member shall be installed, and finally the horizontal connecting reinforcement shall be pulled out and bound firmly with the reinforcement at the edge member.

Fig.

The formed reinforcement framework is used within the edge components of the superimposed shear wall to assist the finalized formwork, so as to reduce the workload of on-site reinforcement and formwork and labor consumption.

Concrete is poured on all sides of the column.

when the spacer is placed through the wall, the spacer should be no less than 2.

After the laminated wall is installed in place, temporary fixing measures shall be taken in time.

The prefabrication part is composed of outer leaf plate, thermal insulation plate and inner shell of the wall.

The vertical connection of shear wall adopts the overlapping mode of reinforcement, which is reliable and easy to check.

In view of the new technological achievements submitted by enterprises, the construction industry modernization development committee of China Architectural Society, after consulting experts, has launched 21 advanced, mature and applicable new technologies, edited and formed the compilation of “advanced, mature and applicable new technologies” for precast buildings (the first batch), which can be used for reference, promotion and application by member units and enterprises in the industry.

Figure 5.

Laminated interior wall panel components 2 Sandwich laminated exterior wall panel components.

Technical advantages: the method of “cavity overlapping and post pouring” is adopted to solve the technical pain points of vertical structure of precast concrete buildings, and realize “full prefabrication of walls, columns, beams and slabs, and full assembly above and underground”.

1 Technical content: the assembled integral laminated concrete structure system adopts the structural technology of “cavity + lap + post pouring”.

Post cast concrete in the cavity forms a laminated stress body, which jointly bears vertical and horizontal actions, and has good overall performance.

4.

1.

At present, 21 new technologies are introduced in detail by stages.

The key technical indexes of assembled integral composite concrete structure are as follows: 1 When the spacer is placed through the wall, the length of the spacer should be no less than 4 M.

3.

(a) Welded reinforcement mesh (b) connection between reinforcement mesh and longitudinal reinforcement (c) formed reinforcement skeleton Figure 1 ， formed reinforcement skeleton and forming process concrete shell + formed reinforcement skeleton + concrete shell = concrete shell of laminated shear wall member + formed reinforcement skeleton = laminated column member Figure 2 ， laminated member 1 Laminated interior wall panel components.

Place the formed reinforcement framework inside, pour two layers of precast slabs through turnover equipment (or non turnover equipment), and the precast slabs are connected through the formed reinforcement framework.

It is made of two-layer precast slab and formed reinforcement framework.

In the form of formwork, the column formed reinforcement skeleton composed of welded stirrup mesh and column longitudinal reinforcement is placed inside.

The inner shell of the wall is provided with a formed reinforcement framework, in which the outer leaf plate, thermal insulation plate and the inner shell of the wall are connected together by thermal insulation connectors.

The pouring height of each layer shall not exceed 1m.

(a) Internal wall I-shaped horizontal connection node (b) external wall I-shaped horizontal connection node (c) internal wall L-shaped horizontal connection node (d) internal wall T-shaped horizontal connection node (E) external wall L-shaped horizontal connection node (f) external wall T-shaped horizontal connection node (g) internal wall vertical connection node (H) external wall vertical connection node (I) Composite beam column connection node (J) composite beam column connection node A-A section 6 typical connection node of composite concrete structure 2 Technical index the design of assembled integral composite concrete structure shall comply with the provisions of the current national standards “technical standard for precast concrete buildings” GB / t51231 and “technical specification for precast concrete structures” jgj1.

Figure 3.

The temporary support of each laminated wall shall not be less than 2; The distance between the upper diagonal support of the laminated wall and the bottom should not be less than 2 / 3 of the height, and should not be less than 1 / 2 of the height; The height between the lower short support and the floor should be 1 / 5 of the member height.

The cavity concrete shall be poured and vibrated in layers.

The upper concrete shall be poured before the initial setting of the lower concrete.