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1、1、工程简介越南沿海火力发电厂3期连接井位于电厂厂区内，距东边的煤灰堆场约100m，连接井最南侧距海边约30m~40m。现根据施工需要，将连接井及部分陆域段钢管段设置成干施工区域，即将全部连接井及部分陆域钢管段区域逐层开挖成深基坑，然后在基坑进行施工工作。基层四周采用CDM桩或者钢板桩进行支护。干施工区域平面图如下所示图1.1干施工区域平面图厌氧发酵罐检修时，要先放空消化液，然后清洗通风，进入罐内必须戴防毒面罩，系安全带，保险绳一端固定在罐外，安排两人以上监护，每次进罐作业时间不得超过一小时。leadingrole,strengtheningthecapacit
2、yofregionalradiation.Urbanandruralisaninevitabletrend,alsorequiredfromabroaderconstructionoftherapidtransitsystem.Enteringthe21stcentury,thecityhasmaintainedfastdevelopmentmomentum,arefeature-richandenhanced.Inherentofcityspacetendstosaturated,inmorefastofdevelopmentspeedXia,citypopu
3、lationscalealsoconstantlyexpansion,cityfunctiontooconcentratedbybringsofproblemincreasinglyserious,howGuideCitybysinglecentertocore-networkmodedevelopment,byCenterCitytoperipheralgroup,andtabletsDistrictordered,andefficientexpandisfuturecitydevelopmentmustfacedofproblem,apparently,tr
4、acktrafficforGuideCityaxistodevelopment,supportcityspacestructureoptimizationandexpandhasnotalternativeofrole.In2014,Yibincitypeople'sGovernmentandthenewroadbridgestocklimitedliabilitycompanysignedthemodernstreetcarprojectastrategiccooperationagreement,newroadbridgeagreementexpressly
5、limitedshares...1.5.1planningperiodandlongterm:asthemainplanningperiodtodeterminefutureneedsofgoalnets,planningperiodto2030,consistentwiththeoverallurbanplanninglongtermlifeinYibincity.Vision:planningnospecificperiodaccordingtotheoverallvisionofthecitydevelopmentplanningandlandusecon
6、trolinurbanareaanditspredictionbasedonpopulationsize,asaconditionofnetworkscaleofvisioncontrol.Moreinlinewiththelawofnetworkformationandmaintaingoodflexibilityinplanningmorescientificand图1.2基坑支护典型断面图（供参考）2、设计资料1、钢板桩桩顶高程为+3.3m；2、地面标高为+2.5m，开挖面标高-5.9m，开挖深度8.4m，钢板桩底标高-14.7m。3、坑内外土体的天然容重
7、γ为16.5KN/m2，内摩擦角为Φ=8.5度，粘聚力c=10KPa；4、地面超载q：按20KN/m2考虑；5、钢板桩暂设拉森Ⅳ400×170U型钢板桩，W=2270cm3，[δ]=200MPa，桩长18m。3内力计算3.1支撑层数及间距按等弯矩布置确定各层支撑的间距，则钢板桩顶部悬臂端的最大允许跨度为：厌氧发酵罐检修时，要先放空消化液，然后清洗通风，进入罐内必须戴防毒面罩，系安全带，保险绳一端固定在罐外，安排两人以上监护，每次进罐作业时间不得超过一小时。leadingrole,strengtheningthecapacityofregionalradiatio
8、n.Urbanandru
