【正文】 he temperature gradient caused by the cold temperature region is also vulnerable to a sharp fall in the formation of cracks. Insulation so that the concrete surface to prevent early cracking is particularly important. Thermal stress from the point of view, the insulation should meet the following requirements: 1) to prevent the concrete inside and outside the concrete surface temperature difference and gradient, to prevent surface cracks. 2) to prevent the concrete supercold, it should be possible to make concrete the construction period of not less than the minimum temperature of concrete used for the stability of the temperature. 第 111 頁 3) to prevent coldold concrete in order to reduce the concrete between the old and new constraints. Early concrete conservation, the main objective is to maintain the appropriate temperature and humidity conditions in order to achieve the effect of two aspects, on the one hand, the concrete from adverse temperature and humidity deformation invasion to prevent the harmful and drying shrinkage. On the one hand, to enable the smooth progress of cement hydration, with a view to meet the design capacity of the strength and crack resistance. Appropriate conditions of temperature and humidity are interrelated. Coagulation on the insulation often has the effect of moisture. Theoretical analysis of fresh concrete contained in the water fully meets the requirements of cement hydration and more than. However, due to evaporation and other factors often cause water loss, thereby delay or prevent the hydration of cement, concrete surface and most likely to be directly affected by such a negative impact. Concrete pouring, therefore the first few days after the critical period of conservation in the construction should pay attention to. 5. concluding remarks Above the temperature of concrete and cracks in the construction of the relation between theory and practice of the preliminary study, although the academic munity about the causes of cracks in concrete and calculation methods are different theories, but specific measures to prevent and improve the opinion it is quite uniform At the same time, the application in practice is also a relatively good effect, concrete construction and more depends on our observation, and more, when pared to multiissue analysis, and more sum up, bined with a wide range of prevention measures, the cracks in the concrete is pletely avoided 第 112 頁 中文翻譯： 混凝土施工溫度與裂縫 的探討 摘要：對(duì)施工中混凝土裂縫的成因進(jìn)行了探討，分析了混凝土的溫度應(yīng)力，詳細(xì)闡述了溫度應(yīng)力的控制和防止裂縫的措施，以避免混凝土產(chǎn)生裂縫，從而保證混凝土的施工質(zhì)量。 (2) basis to avoid too much ups and downs。 (6) Construction of longterm exposure to block the surface of the concrete pouring, or thinwalled structures, thermal insulation in the cold season to take measures。 (4) laid in concrete water pipes, access to cold water to cool。 (2) mixing concrete by adding water or cooling water will be gravel and pouring concrete to reduce the temperature。 第 106 頁 外文文獻(xiàn)翻譯 英文文獻(xiàn)： Discussion on the construction temperature and cracks of concrete Abstract: Based upon analysis of the reasons caused the cracks of concrete the temperature stress of concrete is control measures of temperature stress as well as preventive measures of cracks are elaborated in detail in order to avoid production of cracks in construction process to ensure construction quality. Key words: concrete ,temperature stress, crack, construction In the mass concrete, temperature stress and temperature control system has great significance. There are two reasons:1)In the construction of concrete it often appear temperature cracks, which affects the integrity and durability of the structure。2) In the operation process, the temp