推填挤淤工程实践

对于大面积海上回填区域，淤泥的存在会造成回填施工和回填区使用上的困难，必须采取经济合理的方法进行处理。本文通过对阳江核电站东平台海上推填挤淤实践过程的分析，发现对于海上不大于8m厚的淤泥层，可以采取直接推填挤淤的方法排除淤泥。为了达到挤淤效果，在推填挤淤时一次填石厚度要足够大。推填挤淤时应按顺序依次回填，推填的边界要尽量平顺，不要死角，以减少淤泥滑动的阻力。阳江核电站东平台推填挤淤的工程实践表明采取推填挤淤的方法排除淤泥，能节省大量的工程费用。

Backfilling rocks to squeeze out silt in sea beach

By analyzing the practice in construction of the East Platform of Yangjiang Nuclear Power Station, this paper summarizes the process of backfilling rocks in sea beach to squeeze bottom silt out. It is found that if the silt layer on the sea bottom is not thicker than 810m, the silt on sea bottom can be squeezed out by means of rock backfilling. Some key points of this technique are discussed, such as backfilling in steps, and keeping the boundaries of the backfilling area straight and smooth without dead corners. It is proved that this method is effective and can reduce the construction cost.