基于分段荷载传递法的桩网路堤结构荷载效应整体分析模型

张浩; 石名磊; 郭院成

doi:10.11779/CJGE201609010

基于分段荷载传递法的桩网路堤结构荷载效应整体分析模型 English Version

1. 郑州大学土木工程学院,河南郑州 450001;
2. 东南大学交通学院,江苏南京 210096

基金项目: 国家自然科学基金项目（41272132）; 河南省高等学校重点科研项目（16A560009）; 河南省博士后科研项目（2015014）

详细信息

作者简介:
张浩(1985- ),男,博士,讲师,主要从事地基与基础工程方面的科研和教学。E-mail: zzuseu@126.com。

中图分类号: TU473.1
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出版历程
- 收稿日期: 2015-07-19
- 发布日期: 2016-09-24

Analytic model for load effects in geosynthetic-reinforced and pile-supported embankment based on segmented load transfer algorithm

1. School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China;
2. School of Transportation, Southeast University, Nanjing 210096, China

摘要

摘要: 为了系统分析桩网支撑路堤结构的荷载传递效应,首先基于单元分析模型和Marston埋管理论,考虑到路基荷载应力重分布时竖向应力水平和界面剪切强度发挥的影响,采用分段平衡控制方程结合边界位移协调的方法,建立了路基荷载传递分析的分段解析模型;在此基础上,考虑垫层加筋的张拉膜效应影响,结合复合地基桩土相互作用的简化分段分析,根据应力、位移连续性条件,建立路基-加筋（网）垫层-刚性桩复合地基联合作用的桩网支撑路堤结构荷载效应整体计算模型并给出求解方法,明确了桩、土间的荷载分担。通过与工程实测结果的对比,验证了该计算模型的可靠性,并算例分析了路基模型界面剪切强度发挥、筋材兜提效应和垫层材料性能等因素的影响规律,可为桩网支撑路堤结构荷载传递机制的研究提供参考。
- 桩网支撑路堤 /
- 桩土应力比 /
- 土拱效应 /
- 荷载传递 /
- 分段计算方法
Abstract: In order to systematicaly analyze the load transfer in geosynthetic-reinforced and pile-supported embankment (GRPS), firstly, based on the unit cell model and the theory of Marston, a segmented analytic model for load transfer in embankment is established by combining the static equilibrium equation for each segment with the continuity condition of boundary displacement. The analytic model especially considers the influence of vertical stress level and the play of shear strength into account. On this basis, the geomembrane effect is analyzed based on the theory of tensioned membrane, and the pile-soil interaction in composite foundation is analyzed using the segmented analytic model. According to the continuity condition of stress and displacement, an integrated method for analyzing the load transfer in GRPS is proposed, which can take good care of the interaction between embankment fills, reinforced cushion and rigid pile composite foundation. The proposed method is validated by comparing the monitoring data in a project. The factors which affect the pile-soil load effects, such as the play of shear strength of fills, geomembrane effect and properties of cushion, are systematically analyzed. The proposed method is applicable in the working mechanism analysis of GRPS.
- GRPS /
- pile-soil stress ratio /
- soil arching effect /
- load transfer /
- segmented calculation

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参考文献(19)

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