论文部分内容阅读
随着火力发电厂机组容量和工程规模的不断扩大,人工桩基愈来愈多,不仅在沿海软土地基广泛采用,在华北、东北等地区的复杂地基也大量采用。在各类人工地基中,桩基的优点是众所公认的,但是大量打桩之后所带来的就是验桩问题。特别是灌注桩的桩身质量常常是桩基成败的关键,而桩群承载力的确定也关系到经济效益和建筑物的安全。静力法试桩由于耗资大、费工费时而受到许多限制;动力法试桩的成本仅为静载试桩的1％,效率提高几十倍,因此受到国内外工程界普遍重视。近几年来各种方法竞相媲美,形成了一股热潮,但是真正比较成熟而为举世公认的仍推波动方程法。最近华东电力设计院正在谈判引进美国的
With the continuous expansion of power plant unit capacity and project scale, there are more and more artificial pile foundations, which are widely used not only in coastal soft soils, but also in the complex foundations in North China and Northeast China. In all kinds of artificial foundations, the advantages of pile foundations are generally recognized, but after a large number of piles, it is the problem of pile inspection. In particular, the quality of piles of cast-in-place piles is often the key to the success or failure of pile foundations, and the determination of bearing capacity of piles also relates to economic benefits and the safety of buildings. Static test piles are subject to many restrictions due to cost, time, and expense. The cost of the power method test piles is only 1% of the static load test piles, and the efficiency is increased by several times. Therefore, it has received widespread attention from the engineering community at home and abroad. In recent years, various methods have competed against each other and formed an upsurge, but they are actually more mature and generally recognized as the wave equation method. Recently East China Electric Power Design Institute is negotiating the introduction of the United States