Seismic Analysis of Soil Nailed Retaining Structures

土钉支护结构的地震分析

基本信息

批准号：
9224479
负责人：
Mladen Vucetic
金额：
$ 18.9万
依托单位：
University of California-Los Angeles
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
1993
资助国家：
美国
起止时间：
1993-08-15 至 1998-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9224479&HistoricalAwards=false
关键词：
Seismic Analysis Soil Nailed Retaining

项目摘要

9224479 Vucetic This research project addresses the reinforcement of soil excavations to resist earthquake shaking through the use of soil nailing. Soil nailing is an insitu soil reinforcement technique that has been tested and implemented during the past twenty years in a variety of civil engineering applications. The fundamental concept consists of placing in the ground passive inclusions (steel reinforcing bars) as the excavation proceeds, in order to restrain displacements, limit decompression during and after the excavation, and to form a nailed mass that can behave similarly to a soft retaining wall. Post-earthquake field investigations and laboratory studies have shown that soil-nailed structures are highly resistant to earthquake loading. However, to date, only limited studies have been conducted to evaluate their response and possible failure mechanisms under seismic loading. Such research is needed to develop reliable design methodologies. Given the increasing popularity of soil nailing, this research project will have considerable impact on the geotechnical design and construction industries. This project involves numerical analyses, laboratory experiments -- in which a geotechnical centrifuge is used to subject small-scale models to horizontal shaking -- and post- earthquake observations. This integrated approach provides a thorough understanding of the seismic response of soil- nailed systems, and will result in specific engineering guidelines for their seismic design. This is a collaborative project involving the University of California at Los Angeles and the Polytechnic University, New York, with the experiments being performed on the geotechnical centrifuge at Rensselaer Polytechnic Institute.

9224479 Vucetic 该研究项目致力于通过使用土钉加固土方开挖以抵抗地震摇动。土钉是一种原位土壤加固技术，在过去的二十年中已经在各种土木工程应用中进行了测试和实施。基本概念包括在开挖过程中在地面中放置被动包裹体（钢筋），以限制位移，限制开挖期间和开挖后的减压，并形成一个与软挡土墙类似的钉状体。震后现场调查和实验室研究表明，土钉结构具有很强的抗地震荷载能力。然而，迄今为止，仅进行了有限的研究来评估它们在地震载荷下的响应和可能的失效机制。需要进行此类研究来开发可靠的设计方法。鉴于土钉的日益普及，该研究项目将对岩土设计和施工行业产生相当大的影响。该项目涉及数值分析、实验室实验（其中使用岩土离心机对小型模型进行水平振动）以及震后观测。这种综合方法可以全面了解土钉系统的地震响应，并将为其抗震设计提供具体的工程指南。这是一个涉及加州大学洛杉矶分校和纽约理工大学的合作项目，实验在伦斯勒理工学院的土工离心机上进行。