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混凝土芯砂石桩是一项地基处理新技术,良好的通水性能和排水固结作用是有别于其他方法的技术特色之一。理论计算表明,混凝土芯砂石桩具有与塑料排水板或袋装砂井基本等效的排水固结功能;现场实测分析表明,混凝土芯砂石桩能加快超静孔压的消散,促进整个桩长范围内桩间地基土的固结密实,缩短路堤填筑和沉降稳定的时间,提高地基整体刚度和稳定性,同时提高桩侧摩阻力,加大荷载传递深度,提高深层地基压缩固结效果,有利于控制工后沉降。
Concrete core sand pile is a new foundation treatment technology, good water flow and drainage consolidation is different from the other methods of technical features. Theoretical calculations show that concrete core sand pile has the same function of drainage consolidation as plastic drainage board or bagged sand well. Field measurements show that concrete core sand pile can accelerate the dissipation of excess pore pressure and promote the entire pile Consolidation of foundation soil between piles in a long area is dense, shortening the time for embankment filling and settling, improving the overall rigidity and stability of foundation, increasing the frictional resistance of pile, increasing the depth of load transfer and enhancing the consolidation effect of deep foundation , Is conducive to controlling post-construction settlement.