通缝拼装盾构隧道横向刚度有效率计算方法及其影响因素

发布时间：2018-05-30 02:34

本文选题：盾构隧道 + 横向刚度有效率　；参考：《中国铁道科学》2017年03期

【摘要】：基于盾构隧道横向刚度有效率的定义,推导根据管片纵缝接头刚度解析通缝拼装盾构隧道横向刚度有效率的计算公式,并以实例验证该计算公式的可行性。通过反演分析结果,阐明隧道所处地层的土体力学性能和隧道埋深对盾构隧道横向刚度有效率的影响机制。利用该计算公式分析多个单因素对横向刚度有效率的影响。结果表明:管片环的直径越大,盾构隧道的横向刚度有效率越大;管片截面的抗弯刚度越大、管片纵缝接头刚度越小、管片环分块数量越多,盾构隧道横向刚度有效率越小;盾构隧道横向刚度有效率不仅表征了管片纵缝接头对隧道横向刚度削弱的程度,也反映了管片纵缝接头转动变形而导致的管片环横向变形所占管片环横向总变形的比例,此比例越大,盾构隧道横向刚度有效率越小;反之亦然。
[Abstract]:Based on the definition of the efficiency of transverse stiffness of shield tunnel, a formula for calculating the efficiency of transverse stiffness of shield tunnel is derived according to the stiffness of longitudinal joint of segment, and the feasibility of the formula is verified by an example. Based on the results of inversion analysis, the mechanism of the influence of the soil mechanical properties of the stratum and the depth of the tunnel on the efficiency of the lateral stiffness of the shield tunnel is explained. The effect of multiple single factors on the efficiency of lateral stiffness is analyzed by using the formula. The results show that the larger the diameter of segment ring, the greater the efficiency of transverse stiffness of shield tunnel, the greater the bending stiffness of segment section, the smaller the stiffness of longitudinal joint of segment, the more the number of segment rings, and the less the efficiency of transverse stiffness of shield tunnel. The efficiency of transverse stiffness of shield tunnel not only indicates the degree of weakening of longitudinal joint of segment to the transverse stiffness of tunnel, but also reflects the proportion of transverse deformation of segment ring caused by rotational deformation of segment longitudinal joint in the total transverse deformation of segment ring. The larger the ratio, the smaller the efficiency of lateral stiffness of shield tunnel, and vice versa.
【作者单位】：华东交通大学铁路环境振动与噪声教育部工程研究中心;同济大学道路与交通工程教育部重点实验室;
【基金】：国家自然科学基金资助项目(51608200,51478353,51368020,51468021)
【分类号】：U455.43

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