桩周土体性质对旋挖灌注桩承载力的影响分析  

Analysis on the Influence of Soil Properties around Piles on the Bearing Capacity of Rotary Drilling Cast-in-place Piles

作　　者：周文耀 ZHOU Wenyao(Fujian Juzhu Group Co.,Ltd.,Fuzhou 350011,Fujian,China)

机构地区：[1]福建巨铸集团有限公司,福建福州350011

出　　处：《工程技术研究》2023年第22期24-26,共3页Engineering and Technological Research

摘　　要：旋挖灌注桩技术是一种常用的地基改良技术,旋挖灌注桩承载力是评估其性能和可靠性的重要指标。文章以某项目为依托,通过数值模拟,从桩周土体变形模量、桩端土体变形模量和桩周土黏聚力三个角度探究了桩周土体性质对旋挖灌注桩承载力的影响。研究结果表明,桩周土体变形模量的增大会增加桩的摩擦阻力,桩的侧阻力也会显著增加,从而提高桩的承载力;桩端土体的变形模量对于单桩的极限承载力具有显著的影响,较大的变形模量可增加刚度、侧阻力和摩擦力等因素,从而提高桩的承载力。Rotary drilling cast-in-place pile technology is a commonly used foundation improvement technology.The bearing capacity of rotary drilling cast-in-place pile is an important index to evaluate its performance and reliability.Based on a project,through numerical simulation,this paper explores the influence of soil properties around piles on the bearing capacity of rotary drilling cast-in-place piles from three aspects of deformation modulus of soil around piles,deformation modulus of soil at pile ends and cohesion of soil around piles.The results show that the increase of the deformation modulus of the soil around the pile will increase the friction resistance of the pile,and the side resistance of the pile will also increase significantly,thus improving the bearing capacity of the pile;the deformation modulus of the soil at the pile end has a significant influence on the ultimate bearing capacity of the single pile.The larger deformation modulus can increase factors such as stiffness,side resistance and friction,so as to improve the bearing capacity of the pile.

关 键 词：旋挖灌注桩 承载力 桩周土 变形模量 

分 类 号：TU753.3[建筑科学—建筑技术科学]