深基坑支护理念演进和设计方法改进剖析
Analysis on concept evolution and design method improvement of deep foundation pit support
李连祥 1侯颖雪 2陈天宇 2邢宏侠 2贾斌2
作者信息
- 1. 山东大学土建与水利学院,济南 250061;山东大学基坑与深基础工程技术研究中心,济南 250061;山东高新岩土工程有限公司,济南 250102
- 2. 山东大学土建与水利学院,济南 250061;山东大学基坑与深基础工程技术研究中心,济南 250061
- 折叠
摘要
基于我国 30 多年建设实践,分析现有深基坑支护临时性理念、与主体结构相结合理念实施的优点和不足,提出促进基坑支护工程高质量发展的永久化理念.结合济南某基坑工程,阐释三个理念的逐次提升和相应支护结构的计算内容,定义适应与主体结构相结合理念、永久化理念的结构岩土化、岩土结构化设计方法;重点分析土钉墙与抗浮锚杆相结合的复合土钉墙的设计,以及抗浮锚杆与外伸支撑、水平楼板永久支护结构中抗浮锚杆的力学性状与耐久性,分析了永久支护对于地下室外墙受力机制的影响,阐释深基坑支护理念演化方向和与之适应的设计改进内容.对于反思我国岩土与结构设计管理体制,促进基坑与基础设计理论和方法进步,推动"新发展理念"在基坑工程的实践具有导向价值.
Abstract
Based on the construction practice of more than 30 years in China,the advantages and disadvantages of the existing temporary concept of deep foundation pit support and the concept of combining with the main structure were analyzed,and the permanent concept of promoting the development of foundation pit support engineering was proposed.Combined with a foundation pit project in Jinan,the successive elevations of the three concepts and the calculation contents of the corresponding supporting structure were explained,and the structural geotechnical and geotechnical structural design methods that adapt to the concept of combining with the main structure and the concept of permanence were defined.The design of composite soil nailing wall combined with anti-floating anchor,as well as the mechanical properties and durability of anti-floating anchor in the structure of anti-floating anchor with overhanging support and horizontal floor permanent support were analyzed,the influence of permanent support on the mechanical mechanism of basement exterior wall was analyzed,and the evolution direction of deep foundation pit support concept and the design improvement content adapted to it were explained.It is of guiding value to reflect on the management system of geotechnical and structural design in China,promote the progress of foundation pit and foundation design theory and method,and promote the practice of ＂new development concept＂ in foundation pit engineering.
关键词
基坑工程/深基坑支护理念/结构岩土化/岩土结构化/永久支护结构/复合土钉墙Key words
foundation pit engineering/concept of deep foundation pit support/geotechnical method of structure/structural method of geotechnique/permanent support structure/composite soil nailing wall引用本文复制引用
基金项目
国家自然科学基金项目(52179106)
山东省自然科学基金计划(ZR2018QEE008)
济南市科技计划项目(201201145)
出版年
2024
NETL
NSTL
万方数据