深基坑支护技术在地铁隧道中的应用  

Application of Deep Foundation Pit Support Technology in Subway Tunnel

作　　者：蔡永元 董建忠 谢铭祥 Cai Yongyuan;Dong Jianzhong;Xie Mingxiang(Zhejiang Construction Investment Transportation Infrastructure Group Co.,Ltd.,Hangzhou 310012,China)

机构地区：[1]浙江省建投交通基础建设集团有限公司,浙江杭州310012

出　　处：《科学技术创新》2022年第28期105-108,共4页Scientific and Technological Innovation

摘　　要：由于深基坑的地质构成差异,导致其稳定性较差,需要可靠的支护结构对其进行加固处理,为此,提出深基坑支护技术在地铁隧道中的应用研究。首先结合土质条件与施工水平,分析地铁隧道深基坑稳定性,并以此为基础设置支护结构的荷载能力,分别从支护结构的材料强度、主要应力结构的直径和长度、主要应力结构之间的间距几个方面对支护结构的参数进行设计。在施工阶段,按照逐层施工的方式完成对支护结构的搭建,并建立了针对性的监测机制。测试结果表明,设计深基坑支护技术可以在20 d内实现地铁隧道在水平和竖直方向上的稳态,30 d内的水平位置总量和竖直位移总量分别低于50.00 mm和9.00 mm。Due to the difference in the geological composition of the deep foundation pit, its stability is poor, and a reliable support structure is required to reinforce it. Therefore, the application of deep foundation pit support technology in subway tunnels is proposed. Firstly, combined with soil conditions and construction level, the stability of the deep foundation pit of the subway tunnel is analyzed, and the load capacity of the supporting structure is set based on this. The material strength of the supporting structure, the diameter and length of the main stress structure, the main stress structure The parameters of the support structure are designed in terms of the spacing between them. During the construction phase, the support structure was constructed in a layer-by-layer construction method, and a targeted monitoring mechanism was established. The test results show that the designed deep foundation pit support technology can realize the steady state of the subway tunnel in the horizontal and vertical directions within 20 days, and the total horizontal position and vertical displacement within 30 days are lower than 50.00 mm and 9.00 mm respectively.

关 键 词：深基坑支护 地铁隧道 荷载能力 应力结构 

分 类 号：U455[建筑科学—桥梁与隧道工程]