【摘要】：軟土地區(qū)盾構(gòu)隧道施工會對鄰近建筑物的變形、內(nèi)力產(chǎn)生一定程度的影響,造成該影響的因素包括盾構(gòu)施工工藝、地基特性及建筑物自身特點等。文章以盾構(gòu)施工軸線上方的淺基礎(chǔ)建筑物為研究對象,基于土體損失計算理論,建立了建筑物與基礎(chǔ)、地基協(xié)同作用的力學模型。結(jié)合實際工程,采用1stopt軟件求解彈性地基上建筑物彎曲的微分方程,分析了隧道軸線上方建筑物沉降、傾斜以及內(nèi)力隨盾構(gòu)開挖面位置變化而變化的分布規(guī)律。選取建筑物內(nèi)出現(xiàn)最大正彎矩和最大剪力時的開挖工況,研究土體損失率、建筑物剛度、地基基床系數(shù)等引起建筑物內(nèi)力變化的關(guān)鍵因素及影響規(guī)律。研究成果可為今后盾構(gòu)掘進區(qū)建筑物的保護、設(shè)計和施工提供理論計算基礎(chǔ)。
[Abstract]:The construction of shield tunnel in soft soil area will have a certain degree of influence on the deformation and internal force of adjacent buildings. The factors that cause the influence include the construction technology of shield tunneling, the characteristics of foundation and the characteristics of the building itself, etc. Taking the shallow foundation building above the axis of shield construction as the research object, based on the theory of soil loss calculation, the mechanical model of synergistic action between building and foundation is established in this paper. Combined with practical engineering, the differential equation of building bending on elastic foundation is solved by 1stopt software, and the distribution law of building settlement, inclination and internal force changing with the position of shield excavating surface over the tunnel axis is analyzed. When the maximum positive bending moment and the maximum shear force occur in the building, the key factors and influencing rules of the change of the internal force of the building, such as the loss rate of soil, the stiffness of the building and the coefficient of the foundation bed, are studied. The research results can provide theoretical calculation basis for the protection, design and construction of buildings in shield tunneling area in the future.
【作者單位】： 浙江科技學院土木工程系;浙江大學城市學院土木工程系;杭州地鐵集團有限公司;
【基金】：國家自然科學基金項目(51508506) 杭州市科技計劃項目(20160533B94)
【分類號】：U455.43

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