论文部分内容阅读
为了控制暗挖施工带来的环境风险,提出了以控制地层变形为核心,以保证既有结构安全为目的的风险管理体系.该体系包括:既有结构现状评估、施工影响预测、控制方案制定、监测反馈及工后评估与恢复,在目前国内最大的暗挖地铁换乘车站——北京地铁黄庄站得到了应用,从技术上保证了环境安全.根据监测数据,10号线双层段最终地表沉降全部控制在80 mm以内,其中控制在64 mm以内的测点占总测点数的93.6%;管线测点沉降值全部小于30 mm,最大差异沉降为1.123‰.表明风险控制中制定的控制标准是合理的,施工中采取的措施是有效的.
In order to control the environmental risks brought by undercutting construction, a risk management system is put forward to control the deformation of the stratum and ensure the existing structural safety.The system includes: assessment of existing structure status, prediction of construction impact, formulation of control plan , Monitoring feedback and post-mortem assessment and restoration, the application of the Beijing Subway Huangzhuang Station, the largest underground subway transfer station in China, has technically ensured the environmental safety.According to the monitoring data, The final surface subsidence was all controlled within 80 mm, of which the measuring points within 64 mm accounted for 93.6% of the total measuring points; the settlement points of pipeline measuring points were all less than 30 mm and the maximum differential subsidence was 1.123 ‰, indicating that the risk control The control standards are reasonable and the measures taken during construction are effective.