摘要
某工程球罐场地为在沿海深厚软土地基上大面积填土形成,球罐基础为环形群桩基础,桩型钻孔灌注桩,具有端承长桩的特点。地面沉降观测发现环形端承群桩基础中间的地面沉降要小于周围地面,这反映了桩身负摩阻力对桩间土的影响。用数值方法在模拟桩间土沉降特性基础上再分析桩身负摩阻力特性,并与根据现行规范方法计算的结果进行比较,得到了一些有益的结论,为桩基负摩阻力的研究提供了新思路。
Sphere site is a large area filling on deep soft subsoil. All spheres are supported by annular pile groups which are end bearing and long bored piles. The settlement value at the center of pile groups is less than that at the outside of the pile groups, which reflects the influence of negative skin resistance to the surrounding soils of piles. By simulating the soil settlement characteristics at the center and outside of pile groups, the characteristics of negative skin resistance of the pile groups are analyzed and compared with the results calculated by the present code. Some useful conclusions are drawn for calculating the negative skin resistance.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2013年第S2期1163-1166,共4页
Chinese Journal of Geotechnical Engineering
关键词
端承长桩
负摩阻力
群桩效应
等效圆法
end-bearing long pile
negative skin resistance
effect of pile group
equivalent circle method
