盾构下穿对不同基础形式建筑物的影响分析
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摘要
盾构施工下穿既有建构筑物会不可避免的对其产生影响,基于FLAC3D数值仿真软件,分析了盾构下穿施工对不同基础形式建筑物的影响。结果表明,临近建筑物的区域其纵向沉降值会明显大于其他区域,此外,盾构下穿施工对不同建筑物的影响同时取决于其荷载大小与基础形式。最后,盾构下穿建筑物的影响区段为掘进面距离建筑物10 m左右及掘进面离开建筑物10 m左右,相应的控制举措也应在这一区段范围内施行。
Existing structures under shield construction will inevitably have an impact on them. Based on FLAC3 D numerical simulation software,this paper analyzes the impact of shield tunneling on different foundation structures. The results show that the vertical settlement value of adjacent buildings is significantly higher than that of other areas. In addition,the impact of shield underpass construction on different buildings depends on the load and foundation form. Finally,the range of influence of shield tunneling to building is about 10 m away from the building and about 10 m away from the driving surface,and corresponding control measures should also be within this range.
Existing structures under shield construction will inevitably have an impact on them. Based on FLAC3 D numerical simulation software,this paper analyzes the impact of shield tunneling on different foundation structures. The results show that the vertical settlement value of adjacent buildings is significantly higher than that of other areas. In addition,the impact of shield underpass construction on different buildings depends on the load and foundation form. Finally,the range of influence of shield tunneling to building is about 10 m away from the building and about 10 m away from the driving surface,and corresponding control measures should also be within this range.
引文
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[2]梁荣柱,夏唐代,林存刚,等.盾构推进引起地表变形及深层土体水平位移分析[J].岩石力学与工程学报,2015,34(3):583-593.
[3]姜晓婷,路平,郑刚,等.天津软土地区盾构掘进对上方建筑物影响分析[J].岩土力学,2014,35(S2):535-542.
[4]王占生,王梦恕.盾构施工对周围建筑物的安全影响及处理措施[J].中国安全科学学报,2002(2):48-52,83.
[5]韩雪兵.黄土地区地铁施工地层参数敏感性分析[J].山西交通科技,2012(4):50-52.
[6]黄宏伟,臧小龙.盾构隧道纵向变形性态研究分析[J].地下空间,2002(3):244-251,283.
[7]姜启元,管攀峰,叶蓉.软土盾构隧道的纵向变形分析[J].地下工程与隧道,1999(4):2-6,21-46.