On the basis of the existing prefabricated system, the project integrates the advanced concept of passive energy-saving building, further optimizes the architectural and structural design, explores the technology of components and energy-saving nodes, and uses new energy-saving doors and windows technology, assembled interior decoration technology and information management technology in the whole process to further improve the overall quality of prefabricated buildings.
20 17 1 1 Chen Yiming, chief engineer of the Ministry of Housing and Urban-Rural Development, and Director Su Yunshan and his party visited the project.
Exterior elevation and interior space after completion
primary objective
Space, variable apartment, structure and decoration, pipeline separation
Realize the innovation and combination of assembly technology and low energy consumption technology.
In the climate of hot summer and cold winter and high humidity, the indoor comfortable environment is realized with ultra-low energy consumption.
Project overview
serial number
project
Internal capacity
1
project name
2# pilot building of assembled ultra-low energy consumption building
2
Engineering address
No.3770, Chen Si Highway, Songjiang District
three
construction unit
Shanghai Urban Construction Industry (Group) Co., Ltd.
four
Design unit Shanghai Chengjian Construction Planning and Design Co., Ltd.
five
Construction unit: Shanghai Urban Construction Industry (Group) Co., Ltd.
six
Component production Shanghai Urban Construction Industry Group New Building Materials Co., Ltd.
seven
structural style
Assembling integral shear wall structure
eight
covered area
1800 m2
nine
Monolayer region
300 square meters
10
Building floor
6 layer
1 1
Floor height
3.3 meters
12
clear height
3.0 meters
13
Monomer prefabrication rate
85%
14
Prefabricated member type
Internal and external wallboard, floor, stairs, retaining wall, etc.
15
Built-in assembly rate
95%
Project characteristics
SP laminated slab precast shear wall structure
First, EPC mode is adopted.
The project adopts EPC construction mode, forming an industrial closed loop, with obvious advantages: (1) close integration and unified goal; (2) forming resultant force and reducing internal friction; (3) Joint and several liability and interests; (4) Strong competitiveness; (5) Strong ability to resist risks.
Schematic diagram of EPC construction mode
Second, the prefabrication rate is high.
The wallboard, floor slab, stairs and parapet inside and outside the building are all prefabricated, and the prefabrication rate is over 85%.
Schematic diagram of component division
Three, precast wallboard single row screw connection technology
The shear wall of internal structure adopts single-row bolt connection technology.
Fourth, the application of long-span prestressed hollow floor slab
It can be separated freely, and the floor span of the building reaches 1 1 m, realizing a real large space without beams and columns.
The total floor thickness is 290mm (precast 200mm+ cast-in-place 90mm), which has good noise reduction and sound insulation effect.
Verb (abbreviation of verb) integrates prefabricated sandwich wallboard
The integrated prefabricated sandwich wallboard integrates the structure, external decorative surface, thermal insulation, energy-saving subframe and external sunshade components, which solves the common problems of building quality such as water seepage of doors and windows, wall body, external thermal insulation and falling off of external decorative tiles, and realizes the same service life of external wall insulation and structure.
The insulation layer thickness of precast sandwich wallboard is 150mm, and the external batten is 60 mm. In order to ensure the connection safety between external batten, insulation layer and concrete structure layer, various considerations are made in the selection of wallboard connectors, and this comparison is verified by practical use.
Six, steel structure precast parapet plug-in
The roof parapet is prefabricated, and the prefabricated parapet is hung by steel structure, which has high assembly accuracy and convenient installation, effectively ensuring the overall appearance coordination of the building.
Six, two-dimensional code+chip technology application
The overall information tracking management of PC components adopts passive chip and two-dimensional code to complement each other.
QR code mode
Chip mode
Seven. Application of bim technology
Through BIM technology, design, in-depth design, component fabrication and site construction are connected in series.
Eight, the application of energy-saving doors and windows and sunshade
In order to test the influence of different energy-saving doors and windows on building energy efficiency. This project adopts three different door and window materials and two glass configurations.
Some floors were shaded to test the influence of shading on energy consumption in summer.
9. Treatment of Broken Bridge Nodes Based on Assembled Structure
Precast wallboard and component assembly nodes, door and window installation nodes, pipes entering and leaving the building, sun-shading components, and the insulation layer of the external protection structure should be continuous and complete, and cold bridge-free treatment technology should be adopted to avoid condensation and mildew indoors.
Ten, component assembly node air tightness treatment
Flat-fell seam, wall pipe, door and window seam are designed with sealing measures. In deepening the design.
In hot summer and cold winter areas, there is a large demand for refrigeration in summer, and the poor air tightness leads to the infiltration of hot and humid air from outside into the room, which increases the energy consumption of refrigeration, and at the same time has the risk of condensation and mildew, which affects the use function and life of the house.
In winter, the temperature difference between indoor and outdoor air is large, and the heat loss caused by cold air infiltration increases the heating energy consumption. Improving air tightness can reduce heat loss.
Eleven, indoor environment real-time monitoring technology
Combined with the functional zoning and usage of each floor, different indoor environment treatment forms are adopted: ordinary fresh air system, customized fresh air system and ordinary VRV. The main engine adopts frequency conversion technology and total heat recovery technology to save energy to the maximum extent.
Real-time monitoring and intelligent management of indoor environment. Indoor temperature, humidity, carbon dioxide, PM2.5 and other physical indicators are controlled in the most comfortable range.
Create a quiet environment in room acoustics. Thickened enclosure structure, high air tightness doors and windows, drainage on the same floor and sound insulation of equipment are adopted.
Twelve. Combination of internal and composite structure
Separation of structure, pipeline and decoration; No damage to the wall, convenient maintenance and replacement; Solve the problem of different service lives of building structures and equipment pipelines.
Shanghai Urban Construction Industry Group started from 1997, and now it has the first-class qualification of national housing construction general contracting and a number of professional contracting, the first-class qualification of real estate development enterprises and the first-class qualification of architectural design. It is a large-scale construction group covering four complete industrial chains: real estate development, architectural planning and design, construction general contracting and construction industrialization.
Since 2004, the Group has been deeply studying construction industrialization and passive energy-saving building technologies. The assembled shear wall structure system based on prestressed long-span floor successfully developed by the Group in cooperation with Tongji University has the characteristics of large span, free separation and high prefabrication rate (above 70%), which can be widely used in multi-storey houses, hotels, hospitals and other buildings, and has been implemented in engineering practice. The Sheshan 2 1 Hill 1# and 2# construction projects built with their own systems were selected as the assembled building science and technology demonstration projects planned by the Ministry of Construction in 20 16. In 20 17, it became the first batch of assembled construction industrial bases in China.
The Group strives to build the capacity of building industrialization in industry consolidation, and has a wholly-owned prefabricated product production plant with an annual production capacity of 500,000 ㎡. The Group has the production management ability from real estate development and construction, architectural design, assembly structure system development, assembly product research and development design, component production to assembly engineering construction, and can undertake the whole process construction of assembly buildings from architectural design to construction.
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