三峡库区某桩锚挡墙失稳机理分析  

Study of Failure Mechanism of Retaining Wall with Pile & Anchor Structure in the Three-Gorges Reservoir Region

作　　者：吴曙光[1] 张永兴[1] 刘新荣[1] 

机构地区：[1]重庆大学土木工程学院,重庆400045

出　　处：《重庆建筑大学学报》2007年第1期1-4,30,共5页Journal of Chongqing Jianzhu University

基　　金：国家自然科学基金(50378096);留学回国人员科研启动基金项目[教外司(2002)247号]

摘　　要：高切坡治理方案中桩锚支挡结构体系较重力式挡土墙有着受力合理、经济等优点,但由于施工不当容易发生工程事故,因此应重视桩锚支挡结构施工力学分析。结合三峡库区某污水处理厂环境边坡施工过程中出现倒塌工程事故实例,基于施工力学分析方法,对比分析了桩锚支挡结构在设计和实际施工中的受力状态,提出挡墙失稳机理是由于未按设计要求严格采用逆作法施工,改变了支挡结构的受力状态,超过了结构承载能力,从而导致顶部锚杆被拉断,竖桩发生剪切破坏;并探讨了桩锚支挡结构体系施工要点与施工力学分析方法,提出了失事边坡处理方案。The pile ＆ anchor supporting structural system is not only reasonable but also economical. But the construction order need to be abided, otherwise the engineering accident may occur. Therefore, the attention to mechanical behaviors of construction is necessary. Based on the analysis method of construction mechanics, the failure mechanism of retaining wall with pile＆ anchor structure in the Three - Gorges Reservoir Region is discussed with engineering exampies. The key construction points of pile ＆ anchor supporting structural system and the analysis method of construction mechanics are discussed, and the treatment schemes for the accident case are proposed.

关 键 词：桩锚支挡结构体系 实例分析 失稳机理 施工力学 施工要点 

分 类 号：TU476.4[建筑科学—结构工程]