欠挖 meaning in English
underbreak
underexcavation
Examples
- New technique of control digging shaft
控制井筒过量超挖欠挖的新工艺 - On the basis of the practice on work of extra - insufficient control and the subsidence of vault and the earth ' s surface , cases of engineering surveying techniques applied in the construction supervision in tunnels are discussed
摘要通过超欠挖控制、拱顶下沉、地表下沉的工程实践，讨论在隧道施工监控量测中工程测量技术的应用情况。 - Abstract : the application of smoothwall blasting in crushed surrounding rock of no . 2 tunnel with crushed surrounding rock has obtained more satisfactory results through selecting rational blasting parameters , adopting right supporting method and controlling the overbreak or underbreak of the tunnel effectively , etc
文摘:在周家山2号隧道破碎围岩施工中，应用光面爆破技术，通过选择合理的爆破参数，正确的支护施工方法，有效地控制隧道的超欠挖，加快掘进速度，取得了较理想的效果。 - The application of smoothwall blasting in crushed surrounding rock of no . 2 tunnel with crushed surrounding rock has obtained more satisfactory results through selecting rational blasting parameters , adopting right supporting method and controlling the overbreak or underbreak of the tunnel effectively , etc
在周家山2号隧道破碎围岩施工中，应用光面爆破技术，通过选择合理的爆破参数，正确的支护施工方法，有效地控制隧道的超欠挖，加快掘进速度，取得了较理想的效果。 - Abstract : in order to provide the reasonable parameters in the reliability analysis of tunnel structure and the criterion in the quality control of tunnel engineering , in this paper , the over - under - excavated values of the real - state outline of tunnel excavation are obtained by the near - field photographic method . by using mathematical statistic method , the figure features and probability distributions of the over - under - excavated values of the surrounding rock , including deferent positions of same cross section , are analyzed
文摘:采用近景摄影的方法，从隧道开挖毛洞中获取围岩超欠挖数据，通过数理统计的方法，分析各类围岩超欠挖的数字特征及概率分布，同时得出各类围岩超欠挖在隧道断面不同部位的分布规律，为隧道结构的可靠度研究提供可靠参数，也为隧道工程质量控制提供基准