地层变位分配控制原理在小间距偏压突变大断面隧道中的应用研究
发布时间：2018-10-05 14:41
【摘要】：利用分步变位控制原理研究复杂地质浅埋暗挖小间距偏压突变隧道施工过程中地层变形规律,对限制周边环境及结构本身复杂的隧道工程地表变形具有指导意义。依托深圳地铁7号线工程实例,分析地表在多种复杂条件下的变形规律,结果表明,数值模拟过程中,注浆体充分发挥了作用,地表竖向沉降量(最大为14.82 mm)满足标准要求,但实际监测得到的地表沉降位移明显超过标准值,因为地表变形不仅受注浆措施的控制,还会受到多种不确定因素的影响,但从现场观测结果来看,同时经相关单位论证后,表明并没有因为隧道施工影响周边建筑物的正常运行。因此保障隧道结构及周围环境安全才是最重要的,用统一标准进行地表沉降控制是不尽合理的,对处于复杂地质环境中,且结构本身复杂的隧道工程来说,日常沿用标准几乎不适用。
[Abstract]:Using the principle of stepwise displacement control to study the formation deformation law in the construction process of shallow buried tunnel with small spacing and bias pressure in complex geology, it is of guiding significance to limit the surface deformation of tunnel engineering with complex surrounding environment and structure itself. Based on the engineering example of Shenzhen Metro Line 7, the deformation law of the surface under various complicated conditions is analyzed. The results show that the grouting body plays a full role in the process of numerical simulation, and the surface vertical settlement (maximum 14.82 mm) meets the standard requirements. However, the ground subsidence displacement obtained by actual monitoring is obviously higher than the standard value, because the surface deformation is not only controlled by grouting measures, but also affected by many uncertain factors. However, from the field observation results, and after demonstration by relevant units, It shows that the normal operation of surrounding buildings is not affected by tunnel construction. Therefore, it is the most important to ensure the safety of tunnel structure and surrounding environment. It is unreasonable to control the surface subsidence by using unified standard, for the tunnel engineering which is in the complex geological environment and the structure itself is complex. The standard of daily use is hardly applicable.
【作者单位】： 天津大学水利工程仿真与安全国家重点实验室;天津大学建筑工程学院;中国水利水电第十四工程局有限公司;
【基金】：国家自然科学基金创新研究群体科学基金(51321065)
【分类号】：U455.4
本文编号：2253780
[Abstract]:Using the principle of stepwise displacement control to study the formation deformation law in the construction process of shallow buried tunnel with small spacing and bias pressure in complex geology, it is of guiding significance to limit the surface deformation of tunnel engineering with complex surrounding environment and structure itself. Based on the engineering example of Shenzhen Metro Line 7, the deformation law of the surface under various complicated conditions is analyzed. The results show that the grouting body plays a full role in the process of numerical simulation, and the surface vertical settlement (maximum 14.82 mm) meets the standard requirements. However, the ground subsidence displacement obtained by actual monitoring is obviously higher than the standard value, because the surface deformation is not only controlled by grouting measures, but also affected by many uncertain factors. However, from the field observation results, and after demonstration by relevant units, It shows that the normal operation of surrounding buildings is not affected by tunnel construction. Therefore, it is the most important to ensure the safety of tunnel structure and surrounding environment. It is unreasonable to control the surface subsidence by using unified standard, for the tunnel engineering which is in the complex geological environment and the structure itself is complex. The standard of daily use is hardly applicable.
【作者单位】： 天津大学水利工程仿真与安全国家重点实验室;天津大学建筑工程学院;中国水利水电第十四工程局有限公司;
【基金】：国家自然科学基金创新研究群体科学基金(51321065)
【分类号】：U455.4
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