砂黏复合地层盾构隧道施工地表横向沉降分析
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摘要
依托广州地铁二号线洛溪—南浦区间盾构隧道工程,选取其中处于砂黏互层地层的六个监测断面对其横向沉降进行研究。选择能反映沉降槽偏移的高斯峰值函数拟合实测的沉降数据,得到沉降槽宽度系数、最大沉降量等横向沉降特征的重要参数;并对监测断面的沉降槽对称性进行分析。根据现有的沉降槽宽度系数预测理论,提出了更适合砂黏互层地层沉降槽沉降系数的计算方法;并与拟合值进行了比较。与软土地层、砂砾土地层的沉降槽宽度系数对比,结论表明在等效洞径比相近的情况下沉降槽宽度:软土地层>砂黏互层地层>砂砾土地层。
Based on the shield tunnel project of Luoxi-Nanpu section of Guangzhou Metro Line 2,six monitoring sections in the sand-adhesive interbed stratum were selected to study the lateral settlement. The Gaussian peak function fitting was used to reflect the settlement tank offset. The measured settlement data obtained important parameters of lateral settlement characteristics such as settlement tank width coefficient and maximum settlement were obtained. The settlement symmetry of the monitoring section was analyzed. According to the existing prediction theory of settlement tank width coefficient,the calculation method of the settlement coefficient of the settlement tank in the viscous layer was compared with the fitted value and compared with the settlement coefficient of the soft soil layer and the gravel layer. The conclusions show that the settlement groove width is similar when the equivalent hole ratio is close. The order is soft soil layer > sand-adhesive interbed layer > gravel layer.
Based on the shield tunnel project of Luoxi-Nanpu section of Guangzhou Metro Line 2,six monitoring sections in the sand-adhesive interbed stratum were selected to study the lateral settlement. The Gaussian peak function fitting was used to reflect the settlement tank offset. The measured settlement data obtained important parameters of lateral settlement characteristics such as settlement tank width coefficient and maximum settlement were obtained. The settlement symmetry of the monitoring section was analyzed. According to the existing prediction theory of settlement tank width coefficient,the calculation method of the settlement coefficient of the settlement tank in the viscous layer was compared with the fitted value and compared with the settlement coefficient of the soft soil layer and the gravel layer. The conclusions show that the settlement groove width is similar when the equivalent hole ratio is close. The order is soft soil layer > sand-adhesive interbed layer > gravel layer.
引文
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11汤劲松,刘松玉,童立元.卵砾石地层偏压地形大跨浅埋隧道的施工方法[J].科学技术与工程,2018,18(1):115-121Tang Jinsong,Liu Songyu,Tong Liyuan.Construction method of large-span shallow buried tunnel with gravel stratum bias topography[J].Science Technology and Engineering,2008,18(1):115-121
12杨波.杭州地区不等厚地层双线隧道洞口施工模拟[J].科学技术与工程,2017,17(27):290-297Yang Bo.Simulation of opening construction of double-lane tunnel in unequal thickness strata in Hangzhou area[J].Science,Technology and Engineering,2017,17(27):290-297
13江啸.莞惠城际轨道东江段盾构区间地表沉降分析及数值模拟[D].广州:广东工业大学,2014Jiang Xiao.Surface subsidence analysis and numerical simulation of shield tunneling interval in dongjiang section of Dongguan-Huizhou intercity orbit[D].Guangzhou:Guangdong University of Technology,2014
14朱才辉,李宁.隧道施工诱发地表沉降估算方法及其规律分析[J].岩土力学,2016,37(增刊2):533-542Zhu Caihui,Li Ning.Estimation method and rule analysis of ground subsidence induced by tunnel construction[J].Rock and Soil Mechanics,2016,37(S2):533-542
2 O'reilly M P,New B M.Settlements above tunnels in the united kingdom-their magnitude and prediction[C]//Proc.Tunnelling 82.London:Institution of Mining and Metallurgy,1982:173-181
3韩煊,李宁,Standing J R.Peck公式在我国隧道施工地面变形预测中的适用性分析[J].岩土力学,2007(1):23-28Han Xuan,Li Ning,Standing J R.An andaptability study of Gussian equation applied to predicting ground settlements induced by tunneling in China[J].Rock and Soil Mechanics,2007(1):23-28
4魏纲.盾构法隧道地面沉降槽宽度系数取值的研究[J].工业建筑,2009,39(12):74-79,109Wei Gang.Research on the value of width coefficient of ground subsidence trough of shield tunneling[J].Industrial Buildings,2009,39(12):74-79,109
5佘芳涛,王永鑫,张玉.黄土地层地铁暗挖隧道地表纵向沉降规律及其预测分析方法[J].岩土力学,2015,36(增刊1):287-292She Fangtao,Wang Yongxin,Zhang Yu.Surface longitudinal subsidence law of underground tunnels in loess strata and its prediction and analysis methods[J].Geotechnical Mechanics,2015,36(S1):287-292
6刘重庆,曾亚武,朱泽奇,等.厦门地铁上软下硬地层盾构施工引起的地表沉降研究[J].铁道科学与工程学报,2018,15(2):444-449Liu Chongqing,Zeng Yawu,Zhu Zeqi,et al.Surface subsidence caused by shield construction in soft and hard strata under Xiamen metro[J].Journal of Railway Science and Engineering,2008,15(2):444-449
7申兴柱,高锋,王少鹏,等.盾构隧道施工对浅基础建筑物影响研究[J].施工技术,2017,46(13):132-137Shen Xingzhu,Gao Feng,Wang Shaopeng,et al.Research on the influence of shield tunnel construction on shallow foundation buildings[J].Construction Technology,2017,46(13):132-137
8彭剑文,赵奎,曹宗权,等.FLAC和神经网络在隧道位移反分析中的应用[J].有色金属科学与工程,2011,2(6):79-82Peng Jianwen,Zhao Kui,Cao Zongquan,et al.Application of FLACand neural network in inverse analysis of tunnel displacement[J].Science and Engineering of Nonferrous Metals,2011,2(6):79-82
9朱洪威,宋臻,关天浪.上软下硬地层盾构法隧道地表沉降的数值模拟预测[J].江西理工大学学报,2017,38(1):1-8Zhu Hongwei,Song Zhen,Guan Tianlang.Numerical simulation and prediction of surface subsidence of shield tunneling in upper soft and lower hard strata[J].Journal of Jiangxi University of Science and Technology,2017,38(1):1-8
10潘茁.盾构施工全过程引起的土体扰动与分层沉降特性研究[D].北京:中国矿业大学(北京),2016Pan Zhuo.Study on soil disturbance and layered settlement characteristics caused by shield construction process[D].Beijing:China University of Mining and Technology(Beijing),2016
11汤劲松,刘松玉,童立元.卵砾石地层偏压地形大跨浅埋隧道的施工方法[J].科学技术与工程,2018,18(1):115-121Tang Jinsong,Liu Songyu,Tong Liyuan.Construction method of large-span shallow buried tunnel with gravel stratum bias topography[J].Science Technology and Engineering,2008,18(1):115-121
12杨波.杭州地区不等厚地层双线隧道洞口施工模拟[J].科学技术与工程,2017,17(27):290-297Yang Bo.Simulation of opening construction of double-lane tunnel in unequal thickness strata in Hangzhou area[J].Science,Technology and Engineering,2017,17(27):290-297
13江啸.莞惠城际轨道东江段盾构区间地表沉降分析及数值模拟[D].广州:广东工业大学,2014Jiang Xiao.Surface subsidence analysis and numerical simulation of shield tunneling interval in dongjiang section of Dongguan-Huizhou intercity orbit[D].Guangzhou:Guangdong University of Technology,2014
14朱才辉,李宁.隧道施工诱发地表沉降估算方法及其规律分析[J].岩土力学,2016,37(增刊2):533-542Zhu Caihui,Li Ning.Estimation method and rule analysis of ground subsidence induced by tunnel construction[J].Rock and Soil Mechanics,2016,37(S2):533-542