宁海特大桥不等长桩基础问题探析
发布时间：2019-02-13 05:04
【摘要】：根据宁海特大桥桩基础的实际情况,阐述不等长桩基础的存在性。从地壳运动、河床变迁、洪潮影响及桥位土层分布四个角度分析造成桩长差异的原因。基于m法,分析计算多排桩及单排桩情况下不等长桩基础的内力和变形情况。结果表明:因不等长桩基础导致桩基础几何中心、弹性中心和扭转中心不重合,不等长度桩基和等长度桩基在受力特点上存在较大差异;讨论改善桩长差异的措施,如调整嵌岩深度和其他边设计边施工的方法,但措施基本停于理论,应进一步从理论提升简单必要的构造措施加以改善。
[Abstract]:According to the actual situation of pile foundation of Ninghai super bridge, the existence of unequal length pile foundation is expounded. The reasons of pile length difference are analyzed from four angles: crustal movement, river bed change, flood tide effect and soil layer distribution at bridge position. Based on m method, the internal force and deformation of unequal length pile foundation with multiple rows of piles and single row piles are analyzed and calculated. The results show that the geometric center of pile foundation, elastic center and torsional center do not coincide due to unequal length pile foundation, and the stress characteristics of unequal length pile foundation and equal length pile foundation are quite different. This paper discusses the measures to improve the difference of pile length, such as the method of adjusting the depth of rock socketed and other side design and construction, but the measures are basically stopped in theory, which should be further improved by simple and necessary structural measures from theory.
【作者单位】： 福建省莆田市公路局;福州大学土木工程学院;
【分类号】：U445.551
本文编号：2421205
[Abstract]:According to the actual situation of pile foundation of Ninghai super bridge, the existence of unequal length pile foundation is expounded. The reasons of pile length difference are analyzed from four angles: crustal movement, river bed change, flood tide effect and soil layer distribution at bridge position. Based on m method, the internal force and deformation of unequal length pile foundation with multiple rows of piles and single row piles are analyzed and calculated. The results show that the geometric center of pile foundation, elastic center and torsional center do not coincide due to unequal length pile foundation, and the stress characteristics of unequal length pile foundation and equal length pile foundation are quite different. This paper discusses the measures to improve the difference of pile length, such as the method of adjusting the depth of rock socketed and other side design and construction, but the measures are basically stopped in theory, which should be further improved by simple and necessary structural measures from theory.
【作者单位】： 福建省莆田市公路局;福州大学土木工程学院;
【分类号】：U445.551
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