大体积混凝土的施工技术与裂缝控制研究 土木工程专业

I大体积混凝土施工技术与裂缝控制研究摘 要近些年，我国城市化进程的不断推进及各项基础设施建设的加快，大型及特大型工程显现出增多的趋势，导致了大体积混凝土也日益增多。厚度、长度、宽度尺寸均比较大，混凝土的浇筑量比较大和浇筑面比较宽广等是大体积混凝土的特点。因为它的整体性要求非常高，往往不允许留施工缝，所以对大体积混凝土的施工技术要求比较高，特别在施工浇筑后水泥产生的水化热量大，形成非常大的温度与收缩应力，就会造成混凝土表面产生收缩裂缝等。本文详细介绍了大体积混凝土施工过程中产生的裂缝，在对裂缝的成因进行分析的基础上，具体的论述了对大体积混凝土产生的裂缝怎么控制。详细的包括：大体积混凝土它的施工技术要求，大体积混凝土发生裂缝的缘由及对裂缝控制的方法。经过对大体积混凝土施工技术的进一步研究以及对产生裂缝的把控，总结出安全可靠的技术措施，可以提高大型建筑的安全性以及延长大型建筑的使用年限。关键词：大体积混凝土；施工技术；裂缝控制IIAbstractIn recent years, as China's urbanization process continues to advance and infrastructure construction has accelerated, large-scale and extra-large-scale projects have shown an increasing trend, leading to an increasing number of large-volume concrete. The thickness, length, and width are relatively large. The amount of concrete poured and the surface area where the concrete is poured are characteristics of mass concrete. Because the bulk concrete requires a very high integrity, and often does not allow construction joints, so the construction technology requirements for large volume concrete is relatively high, especially after the construction of the pouring cement produced by the heat of hydration, forming a very large temperature and shrinkage stress , it will cause shrinkage cracks on the concrete surface. This article describes in detail the cracks produced during the construction of mass concrete. Based on the analysis of the causes of the cracks, the control of mass concrete cracks is...