深埋并行双线隧道顺序施工过程的时效理论分析

发布时间：2018-04-26 02:19

本文选题：粘弹性 + 双线隧道　；参考：《应用力学学报》2017年03期

【摘要】：在流变岩土体中进行并行双线隧道施工时,隧道施工过程、布置方式对应力、位移的时空分布有显著影响。针对粘弹性岩土体中双向不等的应力作用下的双圆形隧洞顺序施工问题,本文推导得到了各施工时段开挖增量位移和应力的理论解。推导中利用Laplace变换给出粘弹性解答与弹性复位势的关系,并根据各时段受力情况,应用粘弹性叠加关系导出最终解答。理论解与相同条件下有限元解进行了比对,结果吻合得较好。根据解答分析了两隧道空间布置方式对应力和位移的影响,以及倾斜布置时侧压系数的影响。相比数值方法,理论解答可更方便地进行参数分析和初步设计。
[Abstract]:In the construction of parallel double-line tunnel in rheological rock and soil, the construction process and layout of the tunnel have a significant effect on the space-time distribution of stress and displacement. Aiming at the sequential construction of double circular tunnel under the action of bidirectional unequal stress in viscoelastic rock and soil, the theoretical solutions of the incremental displacement and stress of excavation in each construction period are derived in this paper. In the derivation, the relationship between the viscoelastic solution and the elastic reset potential is given by using the Laplace transform, and the final solution is derived by using the viscoelastic superposition relation according to the stress situation of each period of time. The theoretical solution is compared with the finite element solution under the same conditions, and the results are in good agreement. According to the solution, the influence of space arrangement on stress and displacement of two tunnels and the influence of lateral pressure coefficient on inclined arrangement are analyzed. Compared with the numerical method, the theoretical solution is more convenient for parameter analysis and preliminary design.
【作者单位】：山西省交通科学研究院黄土地区公路建设与养护技术交通行业重点实验室;山西省交通科学研究院黄土地区公路建设与养护技术山西省重点实验室;同济大学航空航天与力学学院;同济大学土木工程学院地下建筑与工程系;同济大学土木工程防灾国家重点实验室;
【基金】：国家重点基础研究发展计划(973计划)(2014CB046901) 黄土地区公路建设与养护技术交通行业重点实验室开放基金(KLTLR-Y13-15) 同济大学土木工程防灾国家重点实验室自主课题(SLDRCE14-B-11)
【分类号】：U455

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