热源法探测陡河水库左坝肩绕坝渗漏通道  

Detecting the dam-detouring leakage passage in the left dam abutment of Douhe Reservoir with the method of heat source

作　　者：陈建生[1] 樊哲超[1] 董海洲[1] 吴庆林 孟文琦 乔冠军 

机构地区：[1]河海大学科学研究院,南京210098 [2]陡河水库管理处,唐山063021

出　　处：《水文地质工程地质》2006年第5期61-65,共5页Hydrogeology & Engineering Geology

基　　金：国家自然科学基金项目资助(50179009)

摘　　要：通过热源法对陡河水库渗漏通道的探测发现，陡河水库左坝肩存在着绕坝渗漏通道。在左坝肩基岩10m高程附近存在低温场异常，通过对水库底部附近温度场分布测量，判定出低温水来自上游右支河水的补给，通过低温区分布确定出绕坝渗漏强渗漏通道的位置，在库水位保持在32m时，根据热源法计算出渗漏通道的渗漏量在3．59×10^5～4．74×10^5m^3／d之间，钻孔发现水库边基岩中的水位比库水位低22m，水位差是造成了水库跌窝事故的主要原因，在11#钻孔中发现了来自河床的细砂，在11#和9#孔中的连通试验证实基岩中的强渗漏通道。There exists dam-detouring leakage passage in the left dam abutment of Douhe reservoir, which is found with the method of heat source. Abnormal low temperature field is found around the elevation of 10 m in the left dam abutment, and the low temperature water is recharged by the reservoir water of upstream right branch by measuring the temperature of the bottom of the reservoir. The position of the dam-detouring strong leakage passage can be determined by the distribution of the low-temperature area. When reservoir level is kept at 32 m, the leakage amount of the leakage passage calculated with heat source method is 3.59 × 10^5 × 4.74 × 10^5 m^3/d. The water level in the bedrock of the reservoir＇ s side is 22 m lower than that of the reservoir. The difference of water level is the main reason for collapse accident of the reservoir. Fine sand coming from the riverbed was found in borehole No. 11. The communication test performed between boreholes No. 11 and No. 9 confirms the strong leakage passage in the bedrock.

关 键 词：热源法 渗漏通道 温度场 灰岩溶洞 连通试验 

分 类 号：P641.6[天文地球—地质矿产勘探] P641.11[天文地球—地质学]