Due to the existence of a large number of discontinuous fractures and interfaces in tunnel surrounding rocks,the groundwater inflow into tunnel generally presents significant anisotropy.Therefore,it is of great signif...Due to the existence of a large number of discontinuous fractures and interfaces in tunnel surrounding rocks,the groundwater inflow into tunnel generally presents significant anisotropy.Therefore,it is of great significance to consider the anisotropic permeability when dealing with water gushing-induced engineering accidents in water-rich mountain tunnels with large burial depth.In this study,based on the complex variable method and the seepage flow theory,a theoretical model of water inflow into a deep-buried circular tunnel in a fully saturated,anisotropic and semi-infinite aquifer is developed.The influence of grouted zone,initial support and secondary lining is fully considered.By comparison to the existing analytical methods and numerical results,the reliability of this proposed analytical solution is well validated.It is indicated from the parametric study that the groundwater inflow into tunnel presents an upward trend with an increasing value of the strata permeability in the vertical direction.Moreover,the water inflow rate and the total water head decrease with the growth of the thickness of grouting circle.It is suggested that reasonable grouting thickness and permeability should be controlled to enhance the grouting effect.This study provides a practical method for estimating the water inflow into a deep-buried,grouted and lined mountain tunnel considering the anisotropic strata permeability.展开更多
2018年3月8?9日,中国临床肿瘤学会(Chinese Society of Clinical Oncology,CSCO)和中国抗癌协会肺癌专业委员会联合主办了第15届“中国肺癌高峰论坛”。本次论坛的主题为“聚焦中枢神经系统转移:精确诊断,精准治疗”。晚期肺癌患者往往...2018年3月8?9日,中国临床肿瘤学会(Chinese Society of Clinical Oncology,CSCO)和中国抗癌协会肺癌专业委员会联合主办了第15届“中国肺癌高峰论坛”。本次论坛的主题为“聚焦中枢神经系统转移:精确诊断,精准治疗”。晚期肺癌患者往往合并脑转移,在1 000多例的肺癌尸检结果中,肺癌脑转移发生率23%~36%,是脑转移性肿瘤中最常见的类型,且通常预后较差[1]。目前肺癌脑(膜)转移的综合治疗管理和治疗结果,仍不令人满意,治疗效果不佳,中位总生存时间16个月,其中脑膜转移的患者则仅为4.5个月左右[2?5]。近10年肺癌的治疗出现了革命性的改变,但肺癌脑转移的诊断和治疗成了提高肺癌长期生存率的瓶颈。临床医师及科研工作者,应如何对脑转移进行准确及时的诊断?在众多的分型分类体系中,又该如何参考应用?如何全面地对脑转移患者的颅内/颅外病灶进行合理评估?对于伴有驱动基因敏感突变的脑转移患者群体,应怎样对待酪氨酸激酶抑制剂(tyrosine kinase inhibitor,TKI)治疗的定位和应用时机?随着血管生成抑制剂和免疫检查点Checkpoint抑制剂的应用发展,新的治疗选择在肺癌脑转移治疗应用中又该如何管理?以上都是肺癌脑转移综合管理中的疑点和难点,急需解答和形成共识以指导临床实践。本次肺癌高峰论坛,综合近年来发表的前瞻性及回顾性重要研究结果、结合我国肺癌脑转移治疗管理的实际情况,与会专家们就肺癌脑转移的综合管理进行了详细的讨论和各抒己见的争辩,最后达成了以下四点共识。展开更多
2017年3月3-4日，中国临床肿瘤学会（Chinese Society of Clinical Oncology，CSCO）和中国抗癌协会肺癌专业委员会联合主办了第十四届“中国肺癌高峰论坛”。本次论坛的主题是“精准与联合：共谱免疫治疗新乐章”。检查点抑制剂（Check...2017年3月3-4日，中国临床肿瘤学会（Chinese Society of Clinical Oncology，CSCO）和中国抗癌协会肺癌专业委员会联合主办了第十四届“中国肺癌高峰论坛”。本次论坛的主题是“精准与联合：共谱免疫治疗新乐章”。检查点抑制剂（Checkpoint inhibitor）因其对多肿瘤类别广泛的适用性及能带来持久的有效缓解，短期内在全球范围掀起了免疫治疗的狂潮。而在非小细胞肺癌患者中，免疫治疗同样带来了令人欣喜的临床获益。展开更多
基金financially supported by the National Natural Science Foundation High Speed Railway Joint Fund of China(No.U1734205)the Open Research Fund Project of Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education,Tongji University(No.KLETJGE-B2104)。
文摘Due to the existence of a large number of discontinuous fractures and interfaces in tunnel surrounding rocks,the groundwater inflow into tunnel generally presents significant anisotropy.Therefore,it is of great significance to consider the anisotropic permeability when dealing with water gushing-induced engineering accidents in water-rich mountain tunnels with large burial depth.In this study,based on the complex variable method and the seepage flow theory,a theoretical model of water inflow into a deep-buried circular tunnel in a fully saturated,anisotropic and semi-infinite aquifer is developed.The influence of grouted zone,initial support and secondary lining is fully considered.By comparison to the existing analytical methods and numerical results,the reliability of this proposed analytical solution is well validated.It is indicated from the parametric study that the groundwater inflow into tunnel presents an upward trend with an increasing value of the strata permeability in the vertical direction.Moreover,the water inflow rate and the total water head decrease with the growth of the thickness of grouting circle.It is suggested that reasonable grouting thickness and permeability should be controlled to enhance the grouting effect.This study provides a practical method for estimating the water inflow into a deep-buried,grouted and lined mountain tunnel considering the anisotropic strata permeability.
文摘2018年3月8?9日,中国临床肿瘤学会(Chinese Society of Clinical Oncology,CSCO)和中国抗癌协会肺癌专业委员会联合主办了第15届“中国肺癌高峰论坛”。本次论坛的主题为“聚焦中枢神经系统转移:精确诊断,精准治疗”。晚期肺癌患者往往合并脑转移,在1 000多例的肺癌尸检结果中,肺癌脑转移发生率23%~36%,是脑转移性肿瘤中最常见的类型,且通常预后较差[1]。目前肺癌脑(膜)转移的综合治疗管理和治疗结果,仍不令人满意,治疗效果不佳,中位总生存时间16个月,其中脑膜转移的患者则仅为4.5个月左右[2?5]。近10年肺癌的治疗出现了革命性的改变,但肺癌脑转移的诊断和治疗成了提高肺癌长期生存率的瓶颈。临床医师及科研工作者,应如何对脑转移进行准确及时的诊断?在众多的分型分类体系中,又该如何参考应用?如何全面地对脑转移患者的颅内/颅外病灶进行合理评估?对于伴有驱动基因敏感突变的脑转移患者群体,应怎样对待酪氨酸激酶抑制剂(tyrosine kinase inhibitor,TKI)治疗的定位和应用时机?随着血管生成抑制剂和免疫检查点Checkpoint抑制剂的应用发展,新的治疗选择在肺癌脑转移治疗应用中又该如何管理?以上都是肺癌脑转移综合管理中的疑点和难点,急需解答和形成共识以指导临床实践。本次肺癌高峰论坛,综合近年来发表的前瞻性及回顾性重要研究结果、结合我国肺癌脑转移治疗管理的实际情况,与会专家们就肺癌脑转移的综合管理进行了详细的讨论和各抒己见的争辩,最后达成了以下四点共识。
文摘2017年3月3-4日，中国临床肿瘤学会（Chinese Society of Clinical Oncology，CSCO）和中国抗癌协会肺癌专业委员会联合主办了第十四届“中国肺癌高峰论坛”。本次论坛的主题是“精准与联合：共谱免疫治疗新乐章”。检查点抑制剂（Checkpoint inhibitor）因其对多肿瘤类别广泛的适用性及能带来持久的有效缓解，短期内在全球范围掀起了免疫治疗的狂潮。而在非小细胞肺癌患者中，免疫治疗同样带来了令人欣喜的临床获益。
