盾构诱发的地表及邻近建筑物变形规律研究
发布时间：2018-11-18 20:10
【摘要】：研究目的:以北京地铁八号线某区间隧道盾构工程为依托,采用FLAC模拟预测盾构施工引起的地表及其附近建筑物的变形规律,为盾构隧道施工安全通过地表建筑物时的合理施工参数确定和现场监测方案的制定提供技术支撑。研究结论:(1)采用数值模拟得到北京地铁隧道盾构施工引起的地表变形规律,地表横向沉降曲线在水平方向上基本对称,建筑物对其周围区域地表变形影响较大,对其所在区域地表变形影响相对较小,最大差异沉降为8,09 mm;(2)数值模拟预测结果表明两隧道开挖对地表影响的范围主要在两隧道中心左右各36 m,开挖面影响区域为开挖面前方24 m及开挖面后方20 m范围内,施工时应重点监测;(3)实践表明实测曲线与数值模拟曲线吻合较好,数值模拟是预测盾构施工对地表及邻近建筑物变形影响规律的有效手段;(4)研究成果可用于地铁盾构施工对地表邻近建筑物的变形控制方案的制定。
[Abstract]:The purpose of this paper is to use FLAC simulation to predict the deformation law of the ground surface and nearby buildings caused by shield tunneling based on the shield engineering of a certain section of Beijing Metro Line 8. It provides technical support for the determination of reasonable construction parameters and the formulation of on-site monitoring scheme for shield tunnel construction safely through surface buildings. The conclusions are as follows: (1) numerical simulation is used to get the law of surface deformation caused by shield tunneling in Beijing subway tunnel. The lateral settlement curve of the ground surface is symmetrical in the horizontal direction, and the building has a great influence on the surface deformation in the surrounding area. The influence on the surface deformation of the area is relatively small, and the maximum differential settlement is 80.09 mm;. (2) the results of numerical simulation and prediction show that the influence range of the excavation on the surface of the two tunnels is mainly about 36 m each in the center of the two tunnels, and the influence area of the excavating surface is within 24 m in front of the excavating surface and 20 m behind the excavating surface. (3) practice shows that the measured curve is in good agreement with the numerical simulation curve, and the numerical simulation is an effective method to predict the influence of shield construction on the deformation of the surface and adjacent buildings. (4) the research results can be used to formulate the deformation control scheme of the ground adjacent buildings during the shield tunneling construction.
【作者单位】： 西安科技大学;
【基金】：陕西省教育厅自然科学专项(2010JK667)资助
【分类号】：U455.43
[Abstract]:The purpose of this paper is to use FLAC simulation to predict the deformation law of the ground surface and nearby buildings caused by shield tunneling based on the shield engineering of a certain section of Beijing Metro Line 8. It provides technical support for the determination of reasonable construction parameters and the formulation of on-site monitoring scheme for shield tunnel construction safely through surface buildings. The conclusions are as follows: (1) numerical simulation is used to get the law of surface deformation caused by shield tunneling in Beijing subway tunnel. The lateral settlement curve of the ground surface is symmetrical in the horizontal direction, and the building has a great influence on the surface deformation in the surrounding area. The influence on the surface deformation of the area is relatively small, and the maximum differential settlement is 80.09 mm;. (2) the results of numerical simulation and prediction show that the influence range of the excavation on the surface of the two tunnels is mainly about 36 m each in the center of the two tunnels, and the influence area of the excavating surface is within 24 m in front of the excavating surface and 20 m behind the excavating surface. (3) practice shows that the measured curve is in good agreement with the numerical simulation curve, and the numerical simulation is an effective method to predict the influence of shield construction on the deformation of the surface and adjacent buildings. (4) the research results can be used to formulate the deformation control scheme of the ground adjacent buildings during the shield tunneling construction.
【作者单位】： 西安科技大学;
【基金】：陕西省教育厅自然科学专项(2010JK667)资助
【分类号】：U455.43
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