摘要
隧道开挖引起的上覆地层位移会导致邻近建筑物损坏。鉴于Peck公式只能描述地面沉降,文章根据随机介质理论,利用扩散传播模型预测了隧道上覆地层位移场,结合建筑物不均匀沉降损坏程度和张裂缝损坏程度划分标准,实现了考虑基础埋深的隧道开挖对邻近建筑物损坏程度的评价。通过工程实例分析,探讨了基础埋深对建筑物损坏程度的影响。结果表明,考虑基础埋深的建筑物损坏评价结果与实际工程现象一致,验证了考虑基础埋深因素在隧道开挖引起邻近建筑物损坏程度评价中的合理性。
Displacement of overlying stratum induced by tunnelling will result in damage to adjacent buildings.In light of the fact that Peck formula can only describe ground settlement,and according to the random medium theory,the displacement field of overlying stratum induced by tunnelling is predicted by using diffusion-convection model.Combined with the criteria for classification of building damages caused by differential settlements and tension cracks,the evaluation of adjacent building damages caused by tunnel excavation considering foundation buried depth is realized.By way of practical engineering cases,the influence of foundation buried depth on building damage is discussed,and it shows the evaluation results considering foundation buried depth are consistent with the actual results,verifying the rationality of considering foundation buried depth in evaluation of adjacent building damage.
作者
常银生
吕乐
王敬敬
王旭东
CHANG Yinsheng;LV Le;WANG Jingjing;WANG Xudong(Institute of Geotechnical Engineering,Nanjing University of Technology,Nanjing 210009;Nanjing Housing Safety Management Office,Nanjing 210009;Hangzhou Geotechnical Engineering&Surveying Research Institute,Hangzhou 310012)
出处
《现代隧道技术》
EI
CSCD
北大核心
2020年第6期17-24,共8页
Modern Tunnelling Technology
基金
国家自然科学基金(41272303)
江苏省“六大人才高峰”计划(09-F-004).
关键词
隧道开挖
邻近建筑物
基础埋深
损坏程度评价
扩散传播模型
Tunnel excavation
Adjacent buildings
Foundation buried depth
Damage evaluation
Diffusion-convection model
