复杂环境下深基坑组合支护结构  

Combined Supporting Structure of Deep Foundation Pit in Complex Surroundings

作　　者：刘福东[1] 张可能[1] 陈永贵[2] 

机构地区：[1]中南大学地学与环境工程学院,湖南长沙410083 [2]长沙理工大学岩土工程研究所,湖南长沙410076

出　　处：《采矿与安全工程学报》2008年第1期108-112,118,共6页Journal of Mining & Safety Engineering

基　　金：湖南省教育厅资助科研项目(06C093)

摘　　要：复杂环境条件下开挖空间为高层建筑和地下工程的关键性技术问题.为了在保证工程安全的前提下最大限度节省成本,选择组合性支护结构对某基坑工程进行支护设计.根据周边不同条件,分别采用水泥土搅拌桩、土钉、树根桩、预应力锚索和喷射混凝土等不同支护形式及其组合结构进行支护,并详细阐述了这些方案的设计参数选取和施工工艺参数.工程实践表明,该类型支护方案具有较好的适用性和安全性,可为类似基坑工程的设计和施工提供借鉴和参考.With the rapid development of urbanization, it is serious and crucial to choose a reasonable and economical method in excavating deep pit in underground engineering and high-rise building under complex environmental condition. In order to save cost as much as possible in the precondition of ensuring engineering safety and reliability of support system, we chose the combined supporting structure for a deep foundation pit. According to field＇s circumjacent condition, different supporting forms such as cement mixing piles, soil-nailing wall, root piles, prestressed cable, sprayed-concrete, and their combination were used to support the deep foundation pit. The design parameters and construction technology parameters of these schemes are described in detail. The engineering practice shows that these types of retaining and protection have a good applicability and security for deep foundation pit, and so can provide a reference and guideline for the similar engineering.

关 键 词：深基坑 组合支护结构 水泥土搅拌桩 土钉墙 树根桩 

分 类 号：TU476[建筑科学—结构工程]