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城市轨道交通地铁车站型式日益复杂,车站基坑工程受到的限制逐渐增多,需要设计者综合运用多种围护方法综合考虑。以北京地铁某车站基坑工程为例,对比分析了各种常用围护结构的优缺点,详细研究了土钉+锚索复合型围护体系的特点,并对其适用范围进行了探讨。从该工程实例情况来看,复合型围护体系简单明了,受力明确,施工速度快,施工作业面大,比较经济安全。
Increasingly complex types of metro stations in urban rail transit and increasing restrictions on the construction of station foundation pit projects require designers to comprehensively consider the use of multiple containment methods. Taking the foundation pit project of a station in Beijing Metro as an example, the advantages and disadvantages of various commonly used retaining structures are compared and analyzed. The characteristics of the compound retaining system of soil nail + anchor cable are studied in detail and the applicable scope is discussed. From the case of the project point of view, the composite enclosure system is simple and clear, the force is clear, the construction speed, construction work area, more economical and safe.