潮位波动下滨海吹填区复合地基内部水位影响控制研究

Research on the Influence Control of Tide Level Fluctuation on the Internal Water Level of the Composite Foundation in the Coastal Reclamation Area

滨海吹填区表层吹填土含砂量高、透水性强,该区域的复合地基易受潮水位变化影响。通过研究堆载预压排水固结与建造围堤结构的潮位影响控制措施,并对复合地基内部水位升降进行现场监测与分析。结果表明:堆载预压排水固结及建造围堤有效控制了潮位波动对地基内部水位的影响,复合地基内部水位幅值波动量仅为外部潮水位的1/30~1/40;复合地基内部水位变化规律与外部潮水位变化规律相似,两者之间存在一定相位差。

The surface soil in the coastal reclamation area has high sand content and strong water permeability,and the composite foundation in this area is easily affected by the change of tide level. By studying the tidal level influence control measures of the preloaded drainage consolidation and construction of the dike structures,and the on-site monitoring and analysis of the rise and fall of the internal water level of the composite foundation were carried out. The results show that the effect of tidal level fluctuations on the internal water level of the foundation is effectively controlled by the preloaded drainage consolidation and the construction of dikes,the amplitude fluctuation of the internal water level is only 1/30~1/40 of the external tide level. The internal water level change law of the composite foundation is similar to the external tide level change law,and there is a certain phase difference between the two.