Promote new construction technology to improve engineering technology content?

Here is the Zhongda consulting to bring you about the promotion of new construction technology to improve the content of engineering technology for reference.

While in recent years with the construction industry industrial scale, industrial quality of the development and improvement of China's construction technology level is constantly improving, especially some of the single technology has been among the world's advanced ranks. But as a whole, the current level of China's construction technology is still relatively low, the construction industry as a traditional labor-intensive industries and rough economic growth, has not been fundamentally changed, in the field of construction engineering how to accelerate the transformation of scientific and technological achievements, and constantly improve the technological content of the project, and comprehensively promote the technological progress of construction enterprises, and to promote the improvement of the overall level of construction technology? The authors believe that the only way is:Only rely closely on scientific and technological progress, scientific management and a large number of technologically advanced, quality and reliable scientific and technological achievements are widely applied to the project, applied to all areas of the construction industry.

1 new technology in construction projects in the application of analysis

In recent years, the construction industry's new technology promotion work in the Ministry of Construction under the correct guidance and the active cooperation of the relevant units, closely around to promote the technological progress of construction enterprises, and constantly improve the scientific and technological content of the project to accelerate the transformation of new technological achievements as the focus of the Ministry of Construction to take a variety of measures to actively explore, make a great deal of work. The Ministry of Construction focuses on promoting the content of ten new technologies, see Table 1.

Table 1: Ministry of Construction focuses on promoting the content of ten new technologies

Projects

Specific content deep pit support technology, pile wall, an internal support technology, pre-stressed anchor support technology, gravity retaining wall and reinforced retaining wall of cement, pit engineering information construction, soil nail wall support technology, high strength, high performance Concrete technology Application technology of ready-mixed stick concrete, application of local materials to formulate high-strength concrete with a variety of performance requirements, development and application of superplasticizers, development and application of ultra-fine active admixtures High-efficiency reinforcing steel and pre-stressed concrete technology New Class III reinforcing bars, cold-rolled ribbed bars, welded mesh technology for reinforcing bars, low relaxation and high-strength steel wire, high-efficiency pre-stressed concrete technology Coarse-diameter reinforcing bar connection technology Electroslag pressure welding technology, Sleeve extrusion connection technology, Taper welding technology, High-efficient pre-stressed concrete technology Sleeve extrusion connection technology, taper thread connection technology, straight thread connection technology new template and scaffolding application technology development new template to meet the requirements of clear water concrete construction, the development of a variety of support methods according to local conditions, increase the proportion of the application of new scaffolding building energy-saving and new wall application technology development of concrete small hollow block building system, the development of the framework of the light-wall building system, the external wall insulation technology, the external thermal insulation technology. Adoption of energy-saving and heat preservation doors and windows and sealing technology of doors and windows, efficient and advanced heating and cooling system new building waterproofing and plastic pipe application technology new waterproof material application technology, development of new waterproofing construction technology, hard PVC pipe application technology, aluminum-plastic composite pipe application technology in construction steel structure technology high-rise steel structure technology, space steel structure technology, lightweight steel structure technology, steel-concrete combined Structural technology, high-strength bolting and welding technology, steel structure protection technology, the overall installation of large components and equipment, the overall installation of mast cranes, cluster jacks synchronized overall lifting technology, the overall installation of mast cranes, cluster jacks synchronized overall lifting technology, the construction of the enterprise's business management software, to improve the level of business management and decision-making; the promotion of the construction technology and process control software To improve the level of production and technical management of enterprises; enterprise information management system to gradually join the Internet, to achieve resource **** enjoy; promotion of construction project management technology information technology, standardization and standardization, to improve the overall competitiveness of enterprises

Being included in the Ministry of Construction in the 2004 science and technology demonstration project of the Dalian Development Zone Cultural Center, is a landmark key project in Dalian, is a set of citizens It is a comprehensive cultural complex integrating citizens' recreation, culture and entertainment, and the government's external reception. The project is invested by Dalian Detai Construction Co., Ltd. and is designed by the internationally renowned Canadian architect Erickson (Erickson Architects), with the construction drawings designed by Dalian Architectural Design & Research Institute and supervised by Shanghai Municipal Construction Engineering Supervision Company. The general contracting of the project is carried out by CCAA, which implements the P (Procurement) and C (Construction) general contracting in the full sense of the word. CCAA will organize the bidding and purchasing of equipment and materials and the construction of the whole project by itself.

Dalian Development Zone Cultural Center Project is located in the north side of Jinma Road in the Development Zone, covering an area of 30,000 m2, with a total construction area of 93,000 m2 and a total contract value of 867 million RMB. It mainly consists of A,B,C,D and E five functional areas, local 6-storey, structural form of frame and box a shear structure.A area for the library, the roof structure for the sloping spherical mesh frame, by the glass roof and zinc composite metal plate roof; B area for the international conference center, the roof for the glass running steps; C area for the 1250-seat opera house and multi-functional theater, the theater lobby roof for the hyperbolic steel structure, box beam structure, the main stage over the roof, the main stage, the main stage, the main stage, the main stage, the main stage, the main stage, the main stage, the main stage, the main stage, the main stage, the main stage, the main stage. Box beam structure, over the main stage and the audience hall over the hyperbolic mesh frame structure, the roof for the Chin-Zinc composite metal plate roof; D area for the underground garage, the roof for the leisure plaza; E area for the underground driveway and garage. Construction of new technology applications are as follows:

(1) pre-cracking blasting pit excavation. C area stage machinery warehouse deep pit foundation depth of 9m, the need to dig down to the rock is about l0m deep, the design requirements of the pit wall slope of 700. to meet the design requirements, the demonstration of the use of the pre-cracking blasting method of excavation of the rocky part of the pit, not only the geometric dimensions of the pit, the elevation, the axial position of the pit to meet design requirements, and 700 outside the rocky body, but also to meet the design requirements, and the design of the pit, the design and the design of the pit. Not only the pit geometry, elevation and axial position meet the design requirements, but also the rock body beyond 700 is intact, without destroying the structure of the surrounding pit wall. At the same time, there is no need for pit support, saving money, speeding up the construction progress, the application effect is good.

(2) Mass concrete pouring construction. the concrete thickness of the side wall of the stage machinery platform silo in Area C reached 4m, and the height was 12.9m. in order to ensure that the concrete did not suffer from temperature cracks due to the large temperature difference between the inside and outside, the construction team carried out a comprehensive technical management through the optimization of the location of the backwater zone, optimization of the concrete mixing ratio, mixing of fly ash, dense-point vibration pounding and layer-by-layer pouring, 3 times of calendaring, and temperature measurement and regulation. The constructor reduced the heat of hydration from five aspects to prevent cracks. First, the use of power plant waste fly ash as admixture, not only to reduce the amount of cement, but also to improve the strength of concrete, impermeability and ease of use. Second, the use of high-efficiency water-reducing agent as an admixture can reduce the water-cement ratio, but also has the effect of enhancing the strength of concrete. Third, add UEA micro-expansion agent. Fourth, the implementation of the second vibration pounding, to improve the compactness and homogeneity of concrete. Fifth, set expansion zone. As a result of effective measures, in the C, D and E area of 10,000 m2 of concrete casting without a crack appeared.

(3)Construction of high span and large cross-section reinforced concrete beams. There are 32 large beams with 20m span and 3.15m height over the mechanical platform warehouse, which is difficult to construct. The construction adopts a rotten frame support system with a frame width of 5m, using adjustable bolt joints and wire rope ties to ensure that the frame is stable. Due to the adoption of control measures for large volume concrete construction, all the beams were poured successfully at one time.

(4) DBF cast-in-place hollow floor slab construction. Beamless DBF cast-in-place concrete hollow slab technology is a new structural technology developed only in recent years in China, which is especially suitable for residential and public **** buildings with large space and large-span column network. This kind of structure has the advantages of reducing self-weight, increasing the rigidity of the floor slab, good acoustic insulation and reducing the cost of the structure. Construction technology innovation points:DBF pipe layout, DBF pipe special positioning card, welding mesh and floor slab concrete twice poured to the top, the application of this technology tends to mature and perfect.

(5)Inverted conical surface oblique intersection steel box beam construction.The steel roof of Area C is novel in shape and complex in structure, with an overall oblique layout, which is composed of space curved box beam oblique intersection steel mesh structure, through-line pipe rotating frame structure, and local mesh frame structure. Among them, the box beam is a curved grid made of more than 260 welded box beams diagonally intersecting 120 welded rhombic bodies in both directions, with an inclination angle of 26. The weight of the steel grid structure is 380t, and the weight of the coherent line pipe rotten frame part is 370t. The construction adopts the high altitude loose splicing and installation method, fixing the three-dimensional position of the rhombic nodes first, and then starting from the middle symmetry axis, symmetrically installing and welding the steel beams between the rhombic nodes in turn.

(6) Other aspects. Ultra-long large-area glass running steps is currently the largest length and area, running steps area of 4000m2, glass is made of 19mmX19mmX1.52mm EN film. A, C area of the Beam roofing system and Chin-Zinc plate roof with dry hanging double roof structure, the lower layer of aluminum-magnesium-manganese alloy Beam system roof panels, the upper layer of Chin-Zinc composite plate folded surface-shaped decorative layer. Chin-Zinc composite panels are self-protecting metal materials, and solid zinc is a natural self-protecting corrosion-resistant, non-ferrous metal. It will be properly exposed to atmospheric conditions, zinc can form a light gray and blue-colored patina, mainly by the protection of roofing metal alkaline zinc carbonate layer is composed of. This patina layer prevents further corrosion of the zinc, giving the metal a long service life of up to 80-100 years.

Cultural Plaza project in the tight schedule, drawings can not be timely in place and other various unfavorable circumstances, as a result of the use of some advanced construction techniques, not only the structure of the construction quality is excellent, but also in 2003 won the Harbin, Changchun, Dalian, the three cities of the Gold Medal of the Joint Inspection of Safety. At the same time, effective measures, scientific organization, strict management, to ensure the quality of the project, accelerate the construction progress, so that the project was successfully completed within the contract period, and achieved good economic and social benefits, in 2004 was included in the Ministry of Construction Science and Technology Demonstration Project.

2 promote the construction of new technology recommendations

New technology application is a comprehensive overall work, ten new technologies should be technically mature, but the real application of engineering practice is not a simple matter, especially the specific circumstances of each project there are differences in the construction level of construction companies are not the same. This requires that in the process of creating the inevitable combination of their own situation and project characteristics, from materials, processes to specific installation and construction need to further improve the supporting, and need to be strictly controlled, especially in the tight schedule, the material can not keep up with the moment, the production of equipment conditions are very easy to appear under the circumstances of quality problems. Therefore, there must be a set of effective management system and system to ensure that the application process does not go out of the way to ensure that the advanced nature of the new technology and achieve the desired results. The authors believe that the focus should be on the following aspects of work:

(1) focus on a period of time to focus on the promotion and application of a number of technologically mature, large quantities of a wide range of new technologies, new products to change the face of the industry has a significant impact is to promote the technological progress of our construction industry, improve the level of construction is a good way.

(2) give full play to the demonstration of demonstration projects to promote the overall technological progress of the urban construction industry. Pilot lead the way, demonstration to promote is the current economic conditions to strengthen the promotion of new technologies and results of the effective form of transformation. The establishment of new technology application demonstration project is to demonstrate the purpose of the project through the demonstration of the pioneering role of radiation to drive other projects to vigorously promote the application of new technologies, and constantly improve the scientific and technological content of the project.

(3) in order to do a good job of promoting new technologies, the authors feel that for construction companies, construction companies should be based on their own situation, combined with the characteristics of the project, to strengthen the construction staff's technical training, and seriously prepare a good construction design, the implementation of the new technology to the implementation of the technical program and control measures.

(4) in order to do a good job of promoting new technologies, to do a good job of acceptance of demonstration projects at all levels. In order to objectively evaluate the project application of new technologies, new products, play a good role in demonstration projects pioneer radiation, to do a good job in a timely manner demonstration project acceptance, do a good job of summarizing and exchange of experience and also in the promotion of new technologies, new products, and also make outstanding contributions to the work of the personnel to be given recognition and rewards. So as to lead the way, expand the demonstration of new technological innovations, guide the new technology from a project to a large number of projects, from an enterprise to the industry-wide promotion and application, through repeated re-application of engineering practice, to further deepen the popularization and application of new technologies, so as to promote the promotion and application of new technologies in the industry as a whole.

(5) Be innovative in the application of new technologies. Ministry of Construction focus on the promotion of 10 new technologies, its principles, processes are mature, in different environmental conditions when applied must be combined with the specific circumstances of the development of measures to ensure that the necessary technical conditions and innovation, breakthroughs, in order to make the new technology continues to develop and show its greater potential. In the innovation of the first to comply with the national mandatory standards, and secondly do not detach from its mechanism, so that, in order to achieve scientific and rational innovation.

3 Conclusion

With the continuous progress and development of society, there will be more new technologies, new equipment and new materials, to be innovative, boldly applied, and combined with modernized scientific management, and continue to achieve good results in the production of construction projects. At the same time, in order to continue to promote technological progress in the construction industry, increase the construction industry to promote advanced and applicable new technologies, the 10 new technologies in the construction industry content should also be adjusted and supplemented to continuously adapt to the new requirements of the development of productive forces, and to achieve sustainable development of enterprises.

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