摘要
有桩靴的桩基在黄河三角洲海域表层硬粉土厚度〈3.5 m的区域插桩时,桩靴下部会形成残留楔体进入下卧软土层内,导致实际插桩深度比理论计算插桩深度少0.5-1.0 m。表层粉土冲切破坏形成弹性楔体,其厚度与桩靴宽度和地基土的内摩擦角有关。楔形体的产生可利用太沙基（K.Terzaghi）浅基础理论结合滑移线场理论解释。残留楔体的厚度受软黏土的厚度和抗剪强度控制。
While the pile foundation with large pile shoes insert in the sea area of the Yellow River Delta where the surface silt is less than 3.5 m thick, the actual depth of insertion lessened by 0.5- 1.0 m than that of the theoretic calculation due to the wedge body below the pile shoes. The wedge body is caused by crush shear demolishment of the surface silt, the thickness of which is related to the breadth and the angle of internal friction of foundation. The formation of the wedge body below the pile shoes can be explained by K. Terzaghi foundation theory and the slip-line method. The remnant thickness of wedge body after inserting soft clay is controlled by the thickness and shear strength of soft clay.
出处
《中国海洋大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第6期1283-1288,共6页
Periodical of Ocean University of China
关键词
黄河三角洲
粉土垫层
残留楔体
the Yellow River delta
silt underlay
wedge body
