广州地铁二号线海-公区间隧道施工防灾监测

城市地铁，特别是区间隧道暗挖施工，由于从地面建筑物及地下管线下面穿过，施工中的土体变形、水位下降和施工崩塌将会对其上的市政设施和建筑物造成不利甚至严重的影响。施工中进行防灾监控量测可及时发现这些不利影响，确保施工及周围环境的安全，减少对城市生活的影响。因此施工防灾监测工怍是城市地铁建设中必不可少的重要环节。广州地铁二号线海珠广场站至公园前站区间隧道，埋深16～25m，其上建筑物密集，部分十分陈旧，隧道采用矿山法暗挖通过。文章从监测的规划、项目设置、观测手段、方式方法、资料处理及成果分析等几方面进行全面详细叙述，观测项目齐全，数据连续、完整、详实、很有规律性，值得作进一步的深层分析。系统而全面的防灾监测工作，有效地保证了地铁施工的顺利完成。防灾监测工作非常成功。监测工作经验值得类似工程监测借鉴。

Construction monitoring of Hai-Gong part tunnels of Guangzhou No.2 subway

Soil deformations,water level descents and collapses caused by urban subway construction,especially the underground-cut tunnel construction,for the reason of passing through under the buildings and the underground pipeline systems will affect the above municipal facilities and buildings seriously.Monitoring during the construction will find the problems promptly and guarantee the construction safety.Consequently construction monitoring is necessary in the urban subway construction.The tunnels of Guangzhou No.2 subway,part of Haizhu Square station to Front Park station,16-25m undersurface,above which there are dense old buildings,are constructed with mining method underground-cut.This paper discusses in detail the monitoring arrangement,item determination,instruments,methods,data disposal and result analysis.Monitoring items are well-set;the datum are continuous,complete,detailed and strongly regular and are worthy of farther analysis.The monitoring for hazard prevention succeeds in ensuring the safty of the subway construction and is therefore worthy of using as reference.