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近年来,随着桩基础在高层建筑、桥梁、重型厂房以至核电站等工程中愈来愈广泛的应用,桩基础的质量检测问题越来越重要。桩基础属于隐蔽工程,质量问题不易被发现,原有的抽芯方法耗时耗力费用高,而应力波反射法检测工程桩完整性,具有轻便、快速、判断直观科学的优点恰能弥补其不足。我们从1990年起采用应力波反射法从事桩基检测工作;至今已完成近4000根工程桩的完整性检测,拥有4套桩基检测分析设备。在大量工程实践的基础上,取得了一定经验,现介绍如下:
In recent years, with the pile foundation in the high-rise buildings, bridges, heavy factories and nuclear power plants and other projects more and more widely used, pile foundation quality inspection problems more and more important. The pile foundation belongs to hidden engineering, the quality problems are not easy to be found, the original core pulling method is time-consuming and costly, while the stress wave reflection method can detect the integrity of engineering piles, and has the advantages of being lightweight, rapid and intuitive. insufficient. Since 1990, we have used stress wave reflection method for pile foundation testing. So far, we have completed the integrity testing of nearly 4,000 engineering piles and have 4 sets of pile foundation testing and analysis equipment. Based on a large number of engineering practice, we have gained some experience and are introduced as follows: