摘要
珠三角城际广佛环线GFHD-1标四工区自起点里程DSK13+648.000至终点里程DSK20+005.200(不含DSK17+274.800-DSK17+810.000)范围内所包含的工作井、车站、盾构隧道和无砟道床施工等全部工程。其中,9号工作井位于广州国际生物岛星汉二路,起讫点里程为DSK13+648-DSK13+670,为地下7层两跨钢筋混凝土结构,小里程连接往科学中心站方向盾构法隧道,大里程连接往琶洲站方向矿山法隧道。工作井长18 m,宽30 m,基坑深度52.48 m。采用明挖顺筑法施工。基坑上部以淤泥及淤泥质土为主,基坑底部位于中砂层中,施工难度大,风险高。基于此,文章建立基坑开挖施工风险评估模型,通过风险评估对开挖风险进行量化,为基坑的施工提供必要的技术支持。
The pearl river delta in tercity G uangfo loop GFH D -1 the fourwork area from startm ileage D St 13＋ 648.000 to end m ileage D St 20＋005.200 （ excluding D St 17＋810.000 - D St 17＋274.800） contained with in the scope of work w ell, station, sh ield tunnel and all w ithout a frantic jum bb roadbed construction eng ineering.A m ong them 9 work well is bcated Jn the guangzhou international bbbgical is＇End walking 2,and some mileage for DSff13＋648-DSff13＋670,for the two span re in foroed concrete structure,underground sm all m ileage connection in the direction of scientific center ofshbld tunnel, hrge m ibage tunnel connection to pazhou station m ining method.The working well is 18 m brig,30 m wide and 52.48 m deep. Constmction is carried outby open excavation m ethod.The upper partofthe foundation pitis m airily siltand silty soil, and the bottom of the foundation pitis bcated in the m iddb sand hyer, which makes the construction difficukand risky.Based on this, this paper established the risk assessm entm odel of foundation pit excavation, quantifies the risk of excavation through risk assessment, and provided necessary technical support for foundation p it construction.
作者
宋书显
SO N G Shu-xiao(China Railway Tunnel Stock C o.,Ltd.,Zhengzhou,Henan 450000,Chin)
出处
《企业技术开发》
2018年第5期1-7,共7页
Technological Development of Enterprise
基金
国家自然科学基金资助项目"循环冻融石炭系板岩横观各向多源损伤演化机制及抑制"(51578550)
关键词
广佛城际铁路
工作井基坑
施工风险
评估
技术支持
guangfu in tercity raiilway
workw ell ftundation pit
construction risk
assessm en
technical support
