北京某公路沉陷变形地质灾害发育特征及成因分析  

Geohazard characteristics and cause analysis of ground subsidence and deformation along national highway in Beijing

作　　者：陈昌彦[1] 岳中琦[2] 陈爱新[1] 陈义军[1] 白朝旭[1] 

机构地区：[1]北京市勘察设计研究院有限公司,北京100038 [2]香港大学土木工程系

出　　处：《岩土工程学报》2010年第3期356-361,共6页Chinese Journal of Geotechnical Engineering

摘　　要：修建于20世纪50年代的某国道k125～k129路段是北京的主要产煤区,地下发育数层可采煤层,公路两侧分布有许多正在开采或废弃的煤矿。自80年代后期以来该公路不断发生沉陷变形,其中k125+600～800路段变形最严重,最大垂向累加沉降变形量约4～4.5 m,侧向位移达2.0～2.5 m,严重威胁到公路的正常运营。以该路段为例,讨论采用地质调查、综合物探和适量地质钻探等综合方法探测和评价地下煤矿采空区对公路沉陷变形的影响,建立有效的综合物探解释标志,以推广应用于其它路段公路变形的探测和评价,为地质灾害治理提供依据。The k125～129 section of a national highway,constructed in 1950’s,is located above a major coal mining area in southwestern Beijing.There are several layers of mine coal beds in this area.Numerous working and abandoned underground coal mines are distributed at the two sides of the highway and even in the safety zone or underneath the highway.Consequently,this highway section has subsided and deformed owing to the coal mining.The k125＋600～800 section is the worst damaged area.It has had the maximum accumulative subsidence of 4.0～4.5 m and displacement of 2.0～2.5 m respectively since the 1980s.Taking the k125＋600～800 section as an example,the research aims to develop an integrated and effective reconnaissance technique to establish the predominant cause of ongoing subsidence of the highway and to affirm the existence of coal workings and other cavities beneath the damaged highway.

关 键 词：公路沉陷变形 煤矿采空影响区 综合探测 

分 类 号：U416.1[交通运输工程—道路与铁道工程]