| 长沙地铁典型地层盾构施工地表沉降分析与预测 |
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| 引用本文： | 蒋彪,皮圣,阳军生,牟友滔.长沙地铁典型地层盾构施工地表沉降分析与预测[J].地下空间与工程学报,2016,12(1):181-187. |
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| 作者姓名： | 蒋彪 皮圣 阳军生 牟友滔 |
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| 作者单位： | 1. 湖南大学 土木工程学院,长沙 410082;2. 长沙市轨道交通集团有限公司,长沙 410011;3. 中南大学 土木工程学院,长沙 410075 |
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| 基金项目： | 国家自然科学基金(51208516)，“十二五”国家科技支撑计划课题(2012BAK24B02) |
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| 摘 要： | 分析了长沙地铁二号线沿线地层特征,以及盾构施工状况,基于长沙地铁土压平衡盾构穿越典型地层100多个地表沉降观测断面大量的地表沉降实测数据的统计分析,探讨采用Peck公式预测长沙地铁施工引起的地表横向沉降槽的可行性,得出了预测长沙地铁土压平衡盾构施工引起的地表沉降基本参数的取值范围,即地表沉降槽宽度系数(K)0.3-0.6,地层损失率0.5%-1.25%。应用本文获得的地表移动参数,采用Peck公式可以较好预测长沙地铁施工引起的地表沉降,及其对于邻近结构物的影响。
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| 关 键 词： | 土压平衡盾构 地铁 地表沉降 沉降槽 |
| 收稿时间： | 2015-03-11 |
Analysis and Prediction of Ground Surface Settlements due to EPB Shield Tunneling of Changsha Metro |
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| Jiang Biao,Pi Sheng,Yang Junsheng,Mou Youtao.Analysis and Prediction of Ground Surface Settlements due to EPB Shield Tunneling of Changsha Metro[J].Chinese Journal of Underground Space and Engineering,2016,12(1):181-187. |
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| Authors: | Jiang Biao Pi Sheng Yang Junsheng Mou Youtao |
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| Affiliation: | 1. School of Civil Engineering, Hunan University, Changsha 410082, P.R.China; 2. Changsha Metro Group Co., Ltd., Changsha 410011, P.R.China;3. School of Civil Engineering, Central South University, Changsha 410075, P.R.China |
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| Abstract: | The characteristics of the strata along Changsha Metro No.2 and the EPB shield are analyzed in this paper. Based on lots of measured settlement data of over 100 monitoring sections from Changsha Metro constructed by EPB shield, the features of the settlement trough induced by the tunneling were analyzed, and whether the Peck formation is adapted to Changsha Metro was discussed in this paper. The range of basic parameters for ground settement were obtained. The width coefficient (K) of settlement trough is in range from 0.3 to 0.6, and ground loss ratio (Vl) is less than 1.25% according to numerous analyses. Using the ground surface movement parameters and Peck formation, the ground surface settlement due to shield tunneling in Changsha areas, and its impacts on adjacent structures can be predicted fairly well. |
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| Keywords: | EPB shield subway ground surface settlement settlement trough |
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