摘要
Abstract
With consideration of geological, monitoring and construction data, the deformation characteristics of surrounding rock of underground powerhouse in construction period was analyzed. The results show that the deformation of surrounding rock has obvious high geo-stress features, such as large magnitude of displacement, obvious timeliness of deformation and shotcrete layer cracking, etc. With the excavation progress, the deformation development did not appeared as a single"staged" type, but some of the measured points were characterized as"stage-stress controlled" type. Under high geo-stress, the deformation de-veloped gradually and the relaxation depth developed toward the inner part of the rock body step by step. Through analysis of his-torical peak deformation rate and supporting time, the measures and suggestions to control the deformation were put forward, such as deep hole presplitting and shallow excavation, increasing the designed tonnage of anchor cable, paying attention to shallow support and consolidation grouting under low pressure.关键词
高地应力/变形特征/变形控制/地下厂房Key words
high geo-stress/deformation characteristics/analysis and control/underground powerhouse分类
建筑与水利
