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有许多吹填工程是利用滩边进行围埝吹填成陆,吹填时需要填砂。因为砂的透水性能好,固结迅速。另外砂的承载能力较大,能保证一般建筑所需地基承载能力,而淤泥质亚粘土或亚粘土是远不能满足以上二点要求的。 吹砂固然是好,但也存在着吹填后泥扩内平整度差的缺点。砂的颗粒愈大,平整度愈差。另一个问题是吹纯砂后,特别是粉砂和极细砂需要复盖粘土,一般复盖30～50厘米厚,以防刮大风时,场地上扬砂现象严重,影
There are many projects of filling and reclamation that use the edge of the beach to fill the land into the land and fill it with sand when blowing and filling. Because of the good water permeability of sand, the consolidation is rapid. In addition, the carrying capacity of sand is larger, which can ensure the bearing capacity of foundation required for general construction. However, the silt loam or loam is far from meeting the above two requirements. Blowing sand is good, but there is also the shortcomings of poor flatness after mud filling. The larger the sand particles, the worse the flatness. Another problem is that after blowing pure sand, in particular, silt and fine sand need to cover the clay, generally covering 30 to 50 cm thick, to prevent wind gusts, the phenomenon of sand on the site is serious,