复杂地质条件下内坑通病预防措施研究  

RESEARCH ON PREVENTIVE MEASURES FOR IN-PIT PASSAGES UNDER COMPLEX GEOLOGICAL CONDITIONS

作　　者：路立娜 LU Li-na(China Railway Construction Engineering Group,100160,Beijing,China)

机构地区：[1]中铁建工集团有限公司,北京100160

出　　处：《建筑技术》2023年第3期332-334,共3页Architecture Technology

摘　　要：针对深基坑工程中“坑中坑”容易出现的结构变形、边坡坍塌、基坑渗水等技术通病,以西安站改扩建工程东配楼项目为依托,对技术通病的预防措施进行分析研究。根据有限元模拟内坑结构应力及变形的分布规律,结合现场特殊黄土地质特点及施工情况,从施工技术、组织管理等方面提出预防和解决措施,合理解决了大埋深地下结构在附加荷载作用下结构局部应力集中引起的变形过大、沉降开裂和渗水等常见问题。In view of the common technical problems of"pit in pit"in deep foundation pit engineering,such as structural deformation,slope collapse,foundation pit seepage,etc.,based on the east wing project of Xi’an Station reconstruction and expansion project,the prevention measures of common technical problems are analyzed and studied.According to the distribution law of stress and deformation of the inner pit structure in finite element simulation,combined with the geological characteristics of the special loss and the construction situation,the prevention and solution measures are put forward from the aspects of construction technology,organization and management,etc.,and the common problems such as excessive deformation,settlement cracking and water seepage caused by local stress concentration of the underground structure with large buried depth under the action of additional load are reasonably solved.

关 键 词：深基坑 坑中坑 技术通病 基坑工程事故 

分 类 号：TU744[建筑科学—建筑技术科学]