合肥地铁6号风井开挖对邻近高速公路的影响
发布时间：2018-12-09 20:03
【摘要】：本文针对深基坑开挖对邻近构筑物沉降影响这一课题,采用有限元数值模拟软件Midas GTS分析研究了合肥地铁深基坑开挖对邻近高速公路的影响。在分析中建立了考虑高速公路及基坑施工过程的三维有限元模型,着重研究了邻近高速公路在不同开挖阶段的最大沉降变化以及不同开挖阶段高速公路的路面沉降分布规律。所得主要结论如下:(1)监测数据显示的基坑围护结构位移变化情况以及路面变化情况与数值模拟出的情况虽然在数值大小上不是非常接近,但是变化趋势比较接近;(2)开挖至基底后路面的最大沉降量为7.77mm,离基坑最远端的路面沉降量为1.13mm。对高速公路安全使用没有造成影响;(3)路面的最大沉降区域始终在离基坑最近的一侧路面,随着开挖的进行,路面的最大沉降量不断增加,但增加速率不断减小;(4)随着开挖的进行,路面的沉降影响范围不断扩大,开挖至4m深时的影响范围为10.8m,开挖至13m深时的影响范围为28.58mm,开挖至最后的沉降影响范围覆盖整个路面,但其主要影响范围为32m左右,再往远处发展的沉降量可以忽略不计;(5)在以后的深基坑开挖工程中,一定要做好监测工作,离基坑较近一侧的沉降监测应作为重点监测区域;(6)利用数值模拟方法计算基坑开挖对邻近高速公路的影响是可行的,计算结果比较接近真实施工情况。
[Abstract]:Aiming at the problem of the influence of deep foundation pit excavation on the settlement of adjacent structures, the influence of deep foundation pit excavation on adjacent expressway is studied by using finite element numerical simulation software Midas GTS. In the analysis, a three-dimensional finite element model considering the construction process of expressway and foundation pit is established, and the maximum settlement variation of adjacent expressway in different excavation stages and the distribution law of pavement settlement in different excavation stages are studied. The main conclusions are as follows: (1) the displacement change of foundation pit enclosure structure and the change of pavement are not very close to the numerical simulation, but the variation trend is close; (2) the maximum settlement of the pavement after excavation to the base is 7.77 mm, and that of the far end of the foundation pit is 1.13 mm. There is no influence on the safe use of expressway; (3) the maximum settlement of the pavement is always on the nearest side of the foundation pit. With the excavation, the maximum settlement of the pavement increases continuously, but the increasing rate decreases; (4) with the development of excavation, the influence range of pavement settlement is continuously expanded, the influence range of excavation to 4 m depth is 10.8 m, the influence range of excavation to 13 m depth is 28.58 mm, and the influence range of excavation to the final settlement covers the whole pavement. However, its main influence range is about 32m, and the amount of settlement developed further can be ignored. (5) in the later excavation of deep foundation pit, the monitoring work must be done well, and the settlement monitoring near the foundation pit should be regarded as the key monitoring area; (6) it is feasible to use the numerical simulation method to calculate the influence of foundation pit excavation on the adjacent expressway, and the calculated results are close to the actual construction situation.
【学位授予单位】：安徽建筑大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U231.3;U412.2
本文编号：2369949
[Abstract]:Aiming at the problem of the influence of deep foundation pit excavation on the settlement of adjacent structures, the influence of deep foundation pit excavation on adjacent expressway is studied by using finite element numerical simulation software Midas GTS. In the analysis, a three-dimensional finite element model considering the construction process of expressway and foundation pit is established, and the maximum settlement variation of adjacent expressway in different excavation stages and the distribution law of pavement settlement in different excavation stages are studied. The main conclusions are as follows: (1) the displacement change of foundation pit enclosure structure and the change of pavement are not very close to the numerical simulation, but the variation trend is close; (2) the maximum settlement of the pavement after excavation to the base is 7.77 mm, and that of the far end of the foundation pit is 1.13 mm. There is no influence on the safe use of expressway; (3) the maximum settlement of the pavement is always on the nearest side of the foundation pit. With the excavation, the maximum settlement of the pavement increases continuously, but the increasing rate decreases; (4) with the development of excavation, the influence range of pavement settlement is continuously expanded, the influence range of excavation to 4 m depth is 10.8 m, the influence range of excavation to 13 m depth is 28.58 mm, and the influence range of excavation to the final settlement covers the whole pavement. However, its main influence range is about 32m, and the amount of settlement developed further can be ignored. (5) in the later excavation of deep foundation pit, the monitoring work must be done well, and the settlement monitoring near the foundation pit should be regarded as the key monitoring area; (6) it is feasible to use the numerical simulation method to calculate the influence of foundation pit excavation on the adjacent expressway, and the calculated results are close to the actual construction situation.
【学位授予单位】：安徽建筑大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U231.3;U412.2
【参考文献】
相关期刊论文 前1条
1 李云安,张鸿昌,糜崇蓉;深基坑工程变形控制及其影响因素的有限元分析[J];水文地质工程地质;2001年04期
相关硕士学位论文 前1条
1 陈滋雄;基坑开挖对邻近建筑物的影响研究[D];重庆大学;2012年
，本文编号：2369949
本文链接：https://www.wllwen.com/kejilunwen/daoluqiaoliang/2369949.html
