潮汕车站软土地基桩网复合地基试验研究

桩-网复合地基是近年发展起来的一种处理软土地基的有效方法,由桩、网和桩间土共同承担上部荷载,其作用机理复杂。通过潮汕车站试验段中桩-网复合地基处理段进行的路基现场试验,对桩-网复合地基中基底土压力、桩和土的沉降及地基侧向位移等进行观测测试,分析了桩土应力分担比的变化过程、沉降及侧向位移规律,有助于桩-网复合地基各组成部分的承载机理和应力传递机理的深入研究。

Experimental Study on Pile-net Composite Foundation of Soft Soils on Chaoshan Railway Station

Pile-net composite foundation has emerged as an effective alternative successfully adopted worldwide to solve many geoteehnieal problems. The load is shared by pile, net and the soil between piles, and its mechanism is of complexity. Through the in-situ monitor on Chaoshan Railway Station, pile-net composite foundation has been careful studied in set- tlement and lateral displacement and contact pressure and the stress and strain of geogrid aspects. The change process in pile-soil stress ratio and the bearing properties of geogrid and settlement have been analyzed. Systematic researches on soft embankment settlement laws, the pile-net composite foundation bearing mechanism and stress transmission mechanism have been performed. And make piles-net composite foundation of the design of the new method provides some basis.