CAJ | 학술논문

为探讨水下盾构隧道施工期流固耦合效应对管片衬砌结构受力的影响，以广-深-港（广州—深圳—香港）铁路客运专线狮子洋越江盾构隧道为依托，建立了该盾构隧道数值分析模型，计算作用在管片结构上的水压，并对隧道施工和运营期间管片结构所受外荷载、内力进行了原位测试；将计算水压力施加到梁-弹簧模型上，得到考虑施工期流固耦合效应的盾构隧道结构受力。研究结果表明：受注浆压力影响，目标环管片刚脱环3～5环时，所受水压力波动较大；脱环10环后，随注浆压力的逐渐消散和流固耦合效应的消失，管片所受水压力接近于该处的静水压力。
위탐토수하순구수도시공기류고우합효응대관편츤체결구수력적영향，이엄-심-항（엄주—심수—향항）철로객운전선사자양월강순구수도위의탁，건립료해순구수도수치분석모형，계산작용재관편결구상적수압，병대수도시공화운영기간관편결구소수외하재、내력진행료원위측시；장계산수압력시가도량-탄황모형상，득도고필시공기류고우합효응적순구수도결구수력。연구결과표명：수주장압력영향，목표배관편강탈배3～5배시，소수수압력파동교대；탈배10배후，수주장압력적축점소산화류고우합효응적소실，관편소수수압력접근우해처적정수압력。
In order to investigate the mechanical characteristics of a underwater shield tunnel under fluid-solid interaction during construction stage,a numerical simulation model was established to calculate water pressure on segment lining by taking Shiziyang shield tunnel as an example. Field tests were carried out to measure external and internal loads acting on segment lining structure. The calculated water pressure was acted on the spring-beam model to analyze structural internal forces,and mechanical characteristics of a segment structure under fluid-solid interaction during construction stage were obtained. The research result shows that water pressure fluctuates obviously to the first 3 to 5 rings after the target segment ring lefts the shield tail owing to grouting pressure. When the number of left-shield-tail rings comes to 10 or more,the water pressure gets close to hydrostatic pressure with the dissertation of grouting pressure and the vanishing of fluid-solid interaction.