摘要
通过现场复合地基静载荷试验和桩土应力比的测试,探讨了水泥土复合地基桩距拉大以后桩土应力比和承载变形机理.对桩距 s =（2.57～2.64） d 的复合地基而言,由于搅拌桩周侧摩阻力的充分发挥,桩间土中的应力不会相互叠加,使复合地基的加固区形成较为坚实的＂加筋复合垫层＂,从而有效扩散应力,使得复合地基的沉降量大大减小.
This article fully investigates the stress ratio of pile and soil and the bearing-deformation mechanism of composite foundation with cement mixing piles whose .pile spacing becomes larger by means of the static load test and pile-soil stress testing. Because of bringing the lateral friction of mixing piles into play for composite foundation of pile space s = （2.57 - 2.64） d, the stress of soil between piles cannot overlap, which makes the composite foundation form a ＂reinforced cushion＂ to diffuse additional stress effectively, so it obviously reduces the settlement of composite foundation.
出处
《工业建筑》
CSCD
北大核心
2007年第6期63-65,45,共4页
Industrial Construction
关键词
水泥土搅拌桩
复合地基
桩土应力比
加筋垫层
cement mixing pile
composite foundation
stress ratio of pile and soil
reinforced cushion
