变电站基坑回填土地面沉降分析  

Analysis on Settlement of the Foundation Pit Backfill in Substation

作　　者：赵海飞 蒋涛 钟波波 ZHAO Haifei;JIANG Tao;ZHONG Bobo(Inner Mongolia Electric Power Survey&Design Institute Co.,Ltd.,Hohhot 010011,China)

机构地区：[1]内蒙古电力勘测设计院有限责任公司,内蒙古呼和浩特010011

出　　处：《电力勘测设计》2022年第8期76-80,共5页Electric Power Survey & Design

摘　　要：以某500 kV变电站基坑回填土地面沉降为分析对象,通过现场岩土工程勘察及场地水文地质条件调查,表明基坑回填土受水浸泡是地面沉降的直接原因。总结造成基坑回填土被水浸泡的原因,提出采用透水性弱的黏性土回填基坑,加强场地排水等设计处理措施和及时检修场地内输水管线等运维措施。针对已经下沉的地面提出地下水抽出、黏性土进行重新压密回填或者灌浆等处理措施。This paper taken the uneven settlement of the foundation pit backfill in one 500 kV substation as the analysis object,Through the in-situ investigation of geotechnical engineering and the in-situ investigation of hydrogeological condition.concluded that the water soaking of the foundation pit backfill is the direct cause of the ground settlement.Summarized the various reasons of the backfill soil of the foundation pit soaked by water,Some design measures have been taken,such as Proposed to adopt that the foundation pit can be backfilled with weakly water permeability cohesive soil,strengthen site drainage and water dispersal measures and some some operation and maintenance measureome have been taken,such as water pipelines overhaul in time.In view of the subsidence of the ground,some treatment measures are proposed,such as draw out groundwater,recompaction and backfilling of clay soil or grouting.

关 键 词：变电站 回填土 不均匀沉降 

分 类 号：P642[天文地球—工程地质学]