深厚淤泥地层条件下水平受荷桩的变形特征  

Deformation Characteristics of Laterally Loaded Piles in Deep Silty and Peaty Strata

作　　者：陈孝轩 CHEN Xiaoxuan(China Building Materials Geological Survey Center Guangdong Division,Guangzhou 510403)

机构地区：[1]中国建材地勘中心广东总队,广州510403

出　　处：《土工基础》2024年第3期427-431,共5页Soil Engineering and Foundation

基　　金：国家自然科学基金青年基金(52208352)。

摘　　要：以广东省某高速公路中深厚淤泥地层条件为背景,通过现场试验获得地层参数,建立符合原位力学特性的数值模型,利用现场实测数据对数值计算的准确性进行了验证。在数值建模计算的基础上,分析了桩在水平荷载作用下位移和弯矩的分布规律。研究表明:(1)深厚淤泥地层条件下桩对水平荷载的承载不利;(2)近地表土层对水平受荷桩影响较大,改变淤泥层厚度对桩的变形影响并不明显;(3)桩体位移及弯矩的传递主要分布在淤泥层,且水平方向位移及弯矩的传递范围仅在桩侧小范围内进行。In this paper,based on the conditions of the thick silt and peaty soil strata in a highway in Guangdong Province,the formation parameters were obtained through field tests,and a numerical model calibrated with the in-situ mechanical character-istics was established.The accuracy of the numerical analysis was verified by using the field measured data.At the same time,the distribution pattern of the displacement and the bending moment of the pile under the lateral loads is analyzed by using nu-merical modeling evaluation.The specific conclusions are as follows:1.Under the condition of the thick silty and peaty soil formation,piles demonstrate large deformation under the lateral loads.2.The near-surface soil layer is greatly affected by the laterally loaded pile,and the deformation effect of changing the thickness of the silty and peaty layer on the pile is not obvious.3.The transmission of the pile displacement and the bending moment is mainly distributed in the silty and peaty layer,and the transmission range of the lateral displacement and the bending moment is only carried out in a small range on the pile side.

关 键 词：水平荷载 深厚软土 有限差分法 数值模拟 

分 类 号：TU473[建筑科学—结构工程]