水平荷载长期作用下沉井变位特性的模型试验研究

穆保岗; 李旭; 龚维明; 赵学亮

doi:10.11779/CJGE201708005

水平荷载长期作用下沉井变位特性的模型试验研究 English Version

1. 东南大学土木工程学院,江苏南京 210096;
2. 泰州市建筑设计院有限公司,江苏泰州 225300

基金项目: 国家重点基础研究发展计划（“973”计划）资助项目（2013CB036304）; 国家留学基金项目（CSC201506095029）

详细信息

作者简介:
穆保岗(1974- ),男,河南邓州人,副教授,博士,主要从事桩基、大型沉井等岩土工程方面的研究工作。E-mail: mubaogang@seu.edu.cn。

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出版历程
- 收稿日期: 2016-04-17
- 发布日期: 2017-08-24

Model tests on deformation characteristics of caissons under long-term horizontal load

1. School of Civil Engineering, Southeast University, Nanjing 210096, China;
2. Taizhou Architectural Design Institute Co., Ltd., Taizhou 225300, China

摘要

摘要: 为研究在水平荷载长期作用下软土中沉井基础的变形特征,设计并实施了3组模型试验。首先进行了预试验以确定模型沉井的水平承载力,然后分别研究了模型沉井在不同大小的水平荷载作用下荷载-变形曲线、被动区土压力分布特征、沉井顶部水平位移、被动区土体水平位移的短期、长期变形特征。基于本次试验数据,对理想弹塑性的p-y曲线按照加载时间和荷载大小予以修正。修正后的理论计算结果与实测值基本一致,并对依托工程进行了试算,修正后的p-y曲线可为软土地区的沉井水平变形计算提供理论依据和设计指导。
- 岩土工程 /
- 沉井 /
- 长期荷载 /
- 变位
Abstract: In order to study the deformation characteristics of caissons buried in soft clay under long-term horizontal load, three groups of model tests are designed and done. The capacity of caissons is first identified, then further tests are carried out to study the load-deformation curves, distribution characteristics of soil pressures in the passive area, displacements at top of the caissons, short-term and long-term displacement characteristics of soils in the passive area. Based on the test data, the ideal elastic-plastic of p-y curve is revised according to the loading time and magnitude. The results calculated by the revised formula agree with the test data, and the case studies show that the revised formula can provide theoretical and design guidance for the deformation calculation of caissons in soft soil areas.
- geotechnical engineering /
- caisson /
- long-term load /
- deformation

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参考文献(13)

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