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1、矩形顶管施工监理工作实践上海轨道交通六号线龙阳路车站是一个比较重要的站。车站共有4个出入口,其中4号出入口穿越东方路,入口设在车站西侧的东方城市花园小区内。由于东方路为浦东的交通主干道,两侧管线复杂,为此,业主与设计单位经多次研究后,决定该通道采用4m×6m矩形顶管方式施工。通道的设计单位为上海地下设计研究院,施工单位为上海隧道股份浦东有限公司,监理单位为上海上咨建设监理有限责任公司。 1、工程概况 本通道横跨东方路,长40.5m,顶管外形尺寸4m×6m,顶管推进坡度7‰,平均覆土厚度5.7m;顶管始发井建在东方城市花园小区内,东贴东方路人行道,西贴小区网球场,南北分别贴近小区住宅和
2、会所;施工场地十分狭小,环境保护要求很高;始发井净尺寸为8m×9.2m,深度11.7m;接受井与龙阳路车站主体西侧连通,受通道顶进方向影响,该井的平面呈五边形,深度11.2m.两井均采用SMW工法桩围护,桩长25m,用¢850三轴搅拌机施工,插入H700×300型钢,井底板采用¢600钻孔桩固定抗浮,基坑根据深度变化,设置了三道¢609钢管支撑。 2、地质及管线情况 该顶管主要推进区域在③层淤泥质粉质粘土层和④superiortorecruitfull-timepeacevolunteers,andtheCountyBureauofPingAnzhiMayTownshipPeacev
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6、eatepeacevolunteerwork,respectthepeacevolunteers,praisesecurityvolunteersbehavioroftheatmosphereandsparenoefforttopromotethesmoothdevelopmentoftheconstructionofsafetyvolunteers.Fourth,insistondifferentiatedprinciple.Peacevolunteersjusttheauxiliarypowerofpublicsecurityorgans,intheworkofthedeployme
7、ntandassignedthetasklearning,traininganddailycontact,toabidebytheprincipleofconfidentiality,andregulatetheirbehavior,notthevolunteersdothingsneverletvolunteerstodo,resolutelyput层淤泥质粘土层中,该区域浅部地下水属潜水类型,主要补给来源为大气降水,水位随季节变