类矩形盾构施工对邻近建筑物影响的数值模拟
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摘要
为研究类矩形盾构施工对邻近十字交叉梁基础框架建筑物的影响,基于建筑物-土体-隧道之间的共同作用,本文采用MIDAS/NX软件建立类矩形盾构隧道垂直下穿十字交叉梁基础框架建筑物的三维有限元模型,考虑隧道水平位置改变和土质条件的影响,分析建筑物受类矩形盾构施工影响的变形和受力规律。研究结果表明,当隧道轴线到建筑物中轴线的水平距离L=0m时,随着隧道开挖的进行建筑物的沉降量增大;框架最大第一主应力和最大剪应变总体上增大;土质条件改变影响较大;随着L增大,框架的最大第一主应力和最大剪应变呈现减小趋势,建筑物产生向隧道一侧的倾斜,L增大到一定距离后建筑物几乎不受影响。
This paper studies the influence of quasi-rectangular shield tunnel construction on adjacent frame buildings with grillage beams foundation. Considering the interaction of building, soil and tunnel, a three-dimensional finite element model is established by using MIDAS/NX software, in which a quasi-rectangular shield tunnel crosses underneath a frame building with grillage beams foundation.Considering the influence of tunnel horizontal position and soil conditions, the deformation and stress of building during quasi-rectangular shield tunnel construction is analyzed. The results show that when the horizontal distance L between the axis of building and tunnel is zero, the settlement of building increases with tunnel excavation, and the maximum first principal stress and the maximum shear strain of the frame structure also increase totally. The soil conditions affect the deformation and stress of structure greatly. With the increase of L, the maximum first principal stress and the maximum shear strain of the frame structure decrease, and the building is inclined to tunnel. When L increases to a certain value,the building is almost unaffected.
This paper studies the influence of quasi-rectangular shield tunnel construction on adjacent frame buildings with grillage beams foundation. Considering the interaction of building, soil and tunnel, a three-dimensional finite element model is established by using MIDAS/NX software, in which a quasi-rectangular shield tunnel crosses underneath a frame building with grillage beams foundation.Considering the influence of tunnel horizontal position and soil conditions, the deformation and stress of building during quasi-rectangular shield tunnel construction is analyzed. The results show that when the horizontal distance L between the axis of building and tunnel is zero, the settlement of building increases with tunnel excavation, and the maximum first principal stress and the maximum shear strain of the frame structure also increase totally. The soil conditions affect the deformation and stress of structure greatly. With the increase of L, the maximum first principal stress and the maximum shear strain of the frame structure decrease, and the building is inclined to tunnel. When L increases to a certain value,the building is almost unaffected.
引文
[1]魏纲,陈春来.双圆盾构施工对邻近砌体建筑物影响的数值模拟[J].工业建筑, 2012, 42(1):117-122.
[2]冯涵,张学民,乔世范,等.双线盾构隧道下穿既有建筑物诱发地表变形规律分析[J].铁道科学与工程学报, 2015, 12(4):866-871.
[3]魏新江,洪杰,魏纲.双圆盾构施工引起邻近桩基附加荷载的分析[J].岩土力学, 2013, 34(3):783-790.
[4]李超人,周传波,陈东,等.双线盾构施工引起地表及建筑物沉降规律研究[J].城市轨道交通研究, 2017(6):108-112.
[5]杨国祥,林家祥,吴惠明,等.双圆盾构近距离穿越构建筑物关键施工技术[J].地下空间与工程学报, 2006, 2(8):1366-1373.
[6]魏纲,叶琦,虞兴福.杭州地铁盾构隧道掘进对建筑物影响的实测分析[J].现代隧道技术, 2015, 52(3):150-159.
[7]杨志豪,沈张勇,朱雁飞,等.类矩形盾构隧道设计方案研究[J].现代隧道技术, 2016, 53(S1):83-91.
[8]刘喜东.城市轨道交通类矩形盾构法隧道施工技术研究[J].城市道桥与防洪, 2017(6):212-216.
[9]魏纲,张鑫海,徐银锋.考虑多因素的类矩形盾构施工引起土体竖向位移研究[J].岩石力学与工程学报, 2018, 37(1):199-208.
[10]汤继新,王柳善,季昌,等.类矩形土压平衡盾构掘进引起的地层变形三维数值分析[J].华东交通大学学报, 2016, 33(1):9-15.
[11]司金标,朱瑶宏,季昌,等.软土层中类矩形盾构掘进施工引起地层竖向变形实测与分析[J].岩石力学与工程学报, 2017, 36(6):1551-1559.
[12]魏纲,余浩强,陈春来,等.双线平行盾构隧道侧穿邻近框架建筑物影响的研究[J].科技通报, 2017, 33(2):167-172.
[13]中国建筑科学研究院.建筑地基基础设计规范:GB 50007-2011[S].北京:中国建筑工业出版社,2011.
[2]冯涵,张学民,乔世范,等.双线盾构隧道下穿既有建筑物诱发地表变形规律分析[J].铁道科学与工程学报, 2015, 12(4):866-871.
[3]魏新江,洪杰,魏纲.双圆盾构施工引起邻近桩基附加荷载的分析[J].岩土力学, 2013, 34(3):783-790.
[4]李超人,周传波,陈东,等.双线盾构施工引起地表及建筑物沉降规律研究[J].城市轨道交通研究, 2017(6):108-112.
[5]杨国祥,林家祥,吴惠明,等.双圆盾构近距离穿越构建筑物关键施工技术[J].地下空间与工程学报, 2006, 2(8):1366-1373.
[6]魏纲,叶琦,虞兴福.杭州地铁盾构隧道掘进对建筑物影响的实测分析[J].现代隧道技术, 2015, 52(3):150-159.
[7]杨志豪,沈张勇,朱雁飞,等.类矩形盾构隧道设计方案研究[J].现代隧道技术, 2016, 53(S1):83-91.
[8]刘喜东.城市轨道交通类矩形盾构法隧道施工技术研究[J].城市道桥与防洪, 2017(6):212-216.
[9]魏纲,张鑫海,徐银锋.考虑多因素的类矩形盾构施工引起土体竖向位移研究[J].岩石力学与工程学报, 2018, 37(1):199-208.
[10]汤继新,王柳善,季昌,等.类矩形土压平衡盾构掘进引起的地层变形三维数值分析[J].华东交通大学学报, 2016, 33(1):9-15.
[11]司金标,朱瑶宏,季昌,等.软土层中类矩形盾构掘进施工引起地层竖向变形实测与分析[J].岩石力学与工程学报, 2017, 36(6):1551-1559.
[12]魏纲,余浩强,陈春来,等.双线平行盾构隧道侧穿邻近框架建筑物影响的研究[J].科技通报, 2017, 33(2):167-172.
[13]中国建筑科学研究院.建筑地基基础设计规范:GB 50007-2011[S].北京:中国建筑工业出版社,2011.