河源断裂与新丰江大桥选址  

HEYUAN FAULT AND THE SELECTION FOR THE LOCATION OF XINFENGJIANG BRIDGE

作　　者：陈传勇[1] 

机构地区：[1]铁道第二勘察设计院,成都610031

出　　处：《地质灾害与环境保护》2006年第1期64-68,共5页Journal of Geological Hazards and Environment Preservation

摘　　要：据粤赣高速公路设计方案,拟建新丰江大桥将从河源断裂附近通过,桥址选择在断层上盘或上下盘,关系到大桥的安全稳定。经论证,桥位应选择在断层下盘硅化岩上,其理由为:(1)按规范要求,桥址在断裂附近通过时,应在同一盘,最好是下盘。(2)邵武-河源断裂虽然是一条活动性断裂,但断裂面已东移至红层与硅化岩交界处,硅化岩是中生代断裂活动标志,到新生代与砂岩、花岗岩都已成为断裂下盘,已不是断裂活动标志。(3)硅化岩是坚硬而且强度大的岩石。According to the Guangdong-Jiangxi highway design,Xinfengjiang Bridge will be constructed near Heyuan fault. It is very important to the stability of the bridge, the location of which is selected on the up or the down section of the fault. The investigation suggested that the bridge would be constructed on the down section whleh is made of quartzite. The reasons are ： 1. According to the criterion ,a bridge should be constructed in the same side of the fault,and the down section is the better while it has to pass by a fauh; 2. Although Heyuan fault is an active one,the fault plane has moved eastward to the border between the red layer and the quartzite. The quartzite is the sign of the activity of a fault forming in the Mesozoic, but not in the Cenozoic. The quartzite with sandstone and granite had become the down section of the fault in the Cenozoie; 3. The quartzite is the hardstrength rock.

关 键 词：活断层 河源断裂 新丰江大桥 硅化岩 

分 类 号：P542.3[天文地球—构造地质学]