深基坑“零”距离既有车站结构安全评估与监测实例分析

SAFETY EVALUATION AND MONITORING CASE ANALYSIS OF EXISTING STATION STRUCTURE WITH ZERO DISTANCE OF DEEP FOUNDATION PIT

当外部作业邻近既有地铁结构时,作为安全防护的重要举措,安全评估及专项监测被广泛应用于工程实际中。作为“零”距离既有车站的典型,以某深基坑项目邻近南宁轨道交通3号线车站为例,全面剖析围护结构方案、安全评估及专项监测过程,以监测数据验证支护设计、安全评估和施工组织的合理性,为类似工程开展提供经验。

As an important measure of safety protection,safety assessment and special monitoring are widely used in engineering practice when the external project is near the existing subway structure.As a typical station with''zero''distance,this paper takes a deep foundation pit project near the station of Nanning Rail Transit Line 3 as an example,comprehensively analyzes the envelope structure scheme,safety assessment and special monitoring process,verifies the rationality of support design,safety assessment and construction organization with monitoring data,and provides experience for similar projects.