• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Soils and foundations >Load-displacement response of drilled shaft tip in soft rocks of sedimentary origin
【24h】

Load-displacement response of drilled shaft tip in soft rocks of sedimentary origin

机译：沉积成因软岩中钻探井头的荷载-位移响应

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A database of in situ drilled shaft and plate load tests in soft rock mass is developed. Analyses of the in situ load tests suggest that (i) the development of tip contact pressures is related to the rock mass shear strength, rock mass deformation modulus, and the vertical displacement of the drilled shaft tip, (ii) embedding the drilled shaft tip contributes to the development of punching shear failure mechanism in the underlying rock mass, however, the mobilized tip contact pressures do not significantly increase as the embedment depth increases unless the rock mass shear strength and deformational properties drastically increase with embedment depth, and (iii) the drilled shaft diameter does not significantly influence the development of the contact pressures, especially in large diameter drilled shafts. A framework for the analysis of the load-displacement response of the drilled shaft tip in soft rock mass is proposed using the in situ load tests. The proposed framework accounts for the observed nonlinear load-displacement response of soft rock mass and is a function of the initial normal stiffness and the initial yield pressure of the rock mass under the drilled shaft tip. Simple equations are developed for the initial normal stiffness and the initial yield pressure of soft sedimentary rocks. Additionally, in situ and laboratory test results are used to provide recommendations for the prediction of the parameters that are required in the proposed models for the initial normal stiffness and the initial yield pressure, namely the unconfined compressive strength and deformation modulus for the rock mass. (C) 2019 Production and hosting by Elsevier B.V. on behalf of The Japanese Geotechnical Society.
机译：建立了软岩体中现场钻探的竖井和板岩荷载测试的数据库。对现场载荷试验的分析表明：（i）尖端接触压力的发展与岩体的抗剪强度，岩体变形模量和钻探的轴尖的垂直位移有关，（ii）嵌入钻探的轴尖有助于推动下伏岩体的冲剪破坏机理，但是，除非埋深增加，否则动静尖端接触压力不会随埋深的增加而显着增加，并且（iii）钻轴直径不会显着影响接触压力的发展，尤其是在大直径钻轴中。利用现场载荷试验，提出了一个分析软岩体中钻尖尖端载荷位移响应的框架。所提出的框架考虑了软岩体的观测到的非线性载荷-位移响应，并且是初始竖向刚度和钻孔竖井下岩体的初始屈服压力的函数。为软质沉积岩的初始法向刚度和初始屈服压力建立了简单的方程式。另外，原位和实验室测试结果用于为建议的模型的初始法向刚度和初始屈服压力（即岩体的无侧限抗压强度和变形模量）所要求的参数的预测提供建议。 （C）2019年由Elsevier B.V.代表日本岩土工程学会制作和主持。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号