外文翻译---高层建筑施工的控制要点

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1、文献翻译 High-rise building construction control points construction process. Data statistics show Ruoyin increase the moisture content of sand, sand rate fell 2% to 3%, concrete strength will be decreased by 15% to 20%, while the quantity of cement and 5% to 20%, gravel and sands affect 5% to 20%； wate

2、r-cement ratio affect more by l%, 5% strength of a 10% reduction. Since the impact so great, it should take appropriate measures to control. (1) According to the regional market conditions for different proportions of raw materials testing, construction process to ensure the timely adjustment of the

3、 ratio, such as 5 40mm stones, M 2.3 fine sand to do a ,5-40mm gravel, M 2.3 in the sand to do a set of so. (2) the ratio of combination of laboratory water content of raw materials, for construction with mud content ratio adjusted to ensure that the ratio of the actual laboratory versatility. In th

4、e actual construction work to strengthen the checks of raw materials, sand and gravel gradation bad, take appropriate measures to adjust, such as the amount of incorporation of 0.5? L 10?L sand and gravel. 2.2 The strict conservation system By pumping concrete high-rise building and more. Pumping co

5、ncrete can not only shorten the construction period, but also to improve the performance of concrete construction. However, the use of certain projects that the ratio of raw materials, vibration control strictly the case, there is still lack of concrete strength. Ana1 Introduction With the vigorous

6、development of Chinas economy, building science and construction technology has been developing rapidly. Especially in urban areas, with land full of tension and further the comprehensive utilization of land, high-rise buildings are increasingly becoming the main urban construction. In general, 9 16

7、 layers (50m) for a class of high-level, 17 to 25 layers (75m) for the second category level, 26 to 40 layers ( 40 layer (100m) for the super-class level. As the multi-storey high-rise buildings into relatively large, and long construction period, large amount of concrete pouring, construction quali

8、ty and safety, has its particularity, the author further enhance the quality and ensure the safety point of view, combined with some experience in practice , my personal views. 2, the intensity of high-rise building control Strength mainly refers to the strength of concrete. As the large amount of h

9、igh-rise buildings of concrete and long construction period, impact of climate and working conditions of many factors, sometimes discrete, a concrete strength, and even failure. So how to overcome and control the strength of the concrete well off? 2.1 ratio of the selected Project started before the

10、 general design requirements are formulated according to different strength grade of concrete, and have to do statutory testing agencies graded test, after the report to be graded, according to grading to do with the ratio test (laboratory ratio), do the same in the actual construction of the implem

11、entation. But the problem is with the site grading is consistent with the lysis of the reasons, mostly for looting period, a serious shortage of curing time. According to experts, the test results, the strength of conservation than all wet 28 days: 3 days is all wet conservation: conservation of the

12、 air were 2:1.5:1 28d. This shows the importance of conservation. (1) of the large volume of concrete should be poured large conservation programs, from the beginning to the conservation of the end of the conservation should be responsible, from the subjective consciousness and conservation should h

13、ave sufficient knowledge. Conservation programs should be personnel, water, day and night, covering measures to consider other aspects, does not leak key details. (2) to strengthen the conservation of the inspection. Conservation measures taken and the situation on site maintenance track record of timely detection of problems and ensure the effectiveness of conservation. 2.3 Reinforced Concrete Strength Evaluation Excluding the non-standard test block production of the phenomenon. When the strength of concrete block design strength test than when it is the strength