近距离双线平行盾构施工引起的土体沉降计算

发布时间：2018-03-30 15:06

本文选题：双线平行盾构施工　切入点：土体沉降　出处：《现代隧道技术》2014年02期

【摘要】：文章提出近距离双线水平平行盾构施工引起的总的土体沉降曲线符合正态分布规律,并对现有双线平行盾构施工引起的地面沉降计算方法进行了综述。针对现有各种方法存在的不足,建立了修正的二维Peck公式,可以计算双线平行盾构施工引起的深层土体沉降,同时能够考虑沉降曲线的不对称性。对计算参数取值进行研究,实测数据统计结果表明i总/i先跟h/D成明显的线性减小关系,提出了参数i总和η总的计算公式。首次提出两条隧道轴线的相对水平距离系数C=L/(h+R),认为总的地面沉降曲线形状与C值大小有关,本文公式适用于C0.6的工况。算例分析结果表明:本文方法预测值与实测值比较吻合,且计算比较简便。
[Abstract]:The paper puts forward that the total soil settlement curve caused by the close distance horizontal and parallel shield tunneling is in accordance with the normal distribution law. This paper also summarizes the existing calculation methods of ground settlement caused by parallel shield tunneling. In view of the shortcomings of various existing methods, a modified two-dimensional Peck formula is established, which can calculate the settlement of deep soil caused by double-line parallel shield tunneling. At the same time, the asymmetry of the settlement curve can be taken into account. The calculated parameters are studied. The statistical results of the measured data show that I / I has a significant linear decrease relationship with H / D first. A general formula for calculating the parameter I summation 畏 is put forward. The relative horizontal distance coefficient of two tunnel axes is presented for the first time, and it is considered that the shape of the total land subsidence curve is related to the value of C value. The formula in this paper is suitable for the working condition of C0.6. The result of example analysis shows that the predicted value of this method is in good agreement with the measured value, and the calculation is simple and convenient.
【作者单位】：义乌工商职业技术学院;浙江大学城市学院土木工程系;
【基金】：国家自然科学基金资助(项目批准号:51078332) 浙江省自然科学基金资助项目(Z1100016)
【分类号】：U452

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