CAJ | 학술논문

大型渡槽槽身设计挠度要求较高，要求对其支撑系统进行预压，测出排架、地基沉降变形，为支撑系统施工设置预拱值提供依据。因渡槽自身荷载大，而且支撑系统预压最大加载是其自身荷载的1.2倍，为保障施工安全和进度，采用半跨和分配梁承重结构预压方式。首先计算出半跨槽身整体荷载(活荷载和恒荷载)，然后根据分配梁承重结构形式和三级预压方式，将荷载分解到分配梁上部和下部并对吨袋进行整体布置。另外，对立杆强度、地基承载力和边坡稳定进行了验算，验证整个支撑系统的安全性、可靠性。通过对午河渡槽支撑系统近1个月的预压和观测，测得相关沉降数据，计算出支撑系统的预拱值，实践说明此种预压方式和强度验算是正确的、可行的，为大型渡槽槽身预压又提供了一种方式和思路。
대형도조조신설계뇨도요구교고，요구대기지탱계통진행예압，측출배가、지기침강변형，위지탱계통시공설치예공치제공의거。인도조자신하재대，이차지탱계통예압최대가재시기자신하재적1.2배，위보장시공안전화진도，채용반과화분배량승중결구예압방식。수선계산출반과조신정체하재(활하재화항하재)，연후근거분배량승중결구형식화삼급예압방식，장하재분해도분배량상부화하부병대둔대진행정체포치。령외，대립간강도、지기승재력화변파은정진행료험산，험증정개지탱계통적안전성、가고성。통과대오하도조지탱계통근1개월적예압화관측，측득상관침강수거，계산출지탱계통적예공치，실천설명차충예압방식화강도험산시정학적、가행적，위대형도조조신예압우제공료일충방식화사로。
It requires high deflection of design for the large aqueduct and the supporting system should be pre-compressed. The deformation of subsidenceofshelvingandfoundationshouldbemeasured.Thesearebasisforthesetofpre-archvalueofthesupportingsystem.Withlargeload oftheaqueduct,themaximumloadofthesupportingsystemis1.2timesasmuchastheloadofitself.Ensuredconstructionsafetyandschedule, thehalf-spanpre-compactionandtheloadbearingstructureschemeofdistributionbeamisadopted.First,thehalf-spanload(liveanddeadloads) is calculated.Then according to distribution beam bearing structure and three-level scheme, the load is assigned to distribution beam up and down.On the basis of distributed load the ton bags are set by the way of equivalent pre-compaction and the cushions, stands, and foundations are checked. And then the security and reliability of the whole supporting system is checked. By means of pre-compaction and observation on Wu aq-ueduct supporting system about 1-month,the severalconcerning subsidence data are obtained,and the pre-arch values of thesupporting system areobtainedasthebasisofsupport systemconstruction.Theexperienceshowsthat pre-compactionschemeandstrengthcheckingisastrategy andanoption.Thatanotheraspectofschemeandthoughtsistakenforthepre-compactionoflargeaqueductbody.