超早期混凝土爆破安全振动速度的讨论
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摘要
在已有的超早期混凝土爆破震动作用下的安全振速试验的基础上,根据混凝土的微观结构、混凝土的水泥水化过程及强度发展规律,分析了超早期混凝土的安全质点振动速度。结果表明:超早期混凝土受到轻微的振动损伤时产生的微裂隙由于水泥水化的继续进行能够愈合,超早期混凝土的安全振动速度在3.0cm/s以上,具有一定的抗爆破震动能力。
Based on the research results on safety vibration velocity of fresh concrete under blasting vibration,and the microstructure of concrete,the process of cement hydration,and the developing laws of concrete strength,the safety vibration velocity of fresh concrete were studied.The results indicated that the microcracks in fresh concrete resulted from the slight damage by blasting vibration can be healed as cement hydration went on,the safety vibration velocity of fresh concrete was more than 3.0cm/s,and it was of aseismatic capability to some extent.
Based on the research results on safety vibration velocity of fresh concrete under blasting vibration,and the microstructure of concrete,the process of cement hydration,and the developing laws of concrete strength,the safety vibration velocity of fresh concrete were studied.The results indicated that the microcracks in fresh concrete resulted from the slight damage by blasting vibration can be healed as cement hydration went on,the safety vibration velocity of fresh concrete was more than 3.0cm/s,and it was of aseismatic capability to some extent.
引文
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(7)卢文波.新浇筑基础混凝土爆破安全振动速度的确定[J].爆炸与冲击,2002,22(4):327-332.
(8)陈明.爆破振动对新浇基础混凝土的影响研究[D].武汉:武汉大学,2003.
(9)冯乃谦.实用混凝土大全[M].北京:科学出版社,2001.
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(13)中华人民共和国标准.爆破安全规程(GB6722-2003)[S].北京:中国标准出版社,2004.
(2)金贤玉.早龄期混凝土试验研究及损伤分析与模糊评价[D].杭州:浙江大学,1997.
(3)金南国,金贤玉,钱在兹.早龄期混凝土静力与动力损伤特性的试验研究.浙江大学学报[J].1997,31(3):372-379.
(4)Hulshizer,A J,Desai A J.Shock vibration effects on freshlyplaced concrete[J].J Construction Engineering and Manage-ment,1984,110(2):266-285.
(5)Hulshizer A J.Acceptable shock and vibration limits forfreshly placed and maturing concrete[J].ACI MaterialsJournal,1996,93(6):524-533.
(6)娄建武,徐全军,龙源.影响核岛新浇混凝土强度的爆破振动速度阈值研究[J].世界地震工程,2003,19(2):163-167.
(7)卢文波.新浇筑基础混凝土爆破安全振动速度的确定[J].爆炸与冲击,2002,22(4):327-332.
(8)陈明.爆破振动对新浇基础混凝土的影响研究[D].武汉:武汉大学,2003.
(9)冯乃谦.实用混凝土大全[M].北京:科学出版社,2001.
(10)内维尔A M.混凝土的性能[M].李国泮,马贞勇译.北京:中国建筑工业出版社,1983.
(11)富文权.混凝土快速硬化[M].北京:中国铁道出版社,1990.
(12)廉慧珍,童良,陈恩义.建筑材料物相研究基础[M].北京:清华大学出版社,1996.
(13)中华人民共和国标准.爆破安全规程(GB6722-2003)[S].北京:中国标准出版社,2004.
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