Abstract: In?order?to?make?a?more?accurate?diagnosis?of?leakage?position,?the?resistivity?tomographic?technology?is?used?in?the?leakage?diagnosis?of?earth?rock-fill?dam?at?Dalin?reservoir,for?the?resisitivity?parameters?of?medium?are?sensitive?to?the?water.?The?results?of?field?investgation?show?that,?there?are?seepage?flows?located?above?the?part?of?331.5?m?at?the?extended?earth?rock-fill?dam?and?the?left?bank?part?of?the?dam?;?at?the?same?time,?there?is?seepage?potential?located?above?329.?0?m?at?the?fight?bank?part?of?homogeneous?earth?dam.?The?reinforced?methods?are?proposed?according?to?the?diagnosis?results,?including?replacing?earth-rock?matierials?located?above?331.5?m?and?329.?0?m?at?the?right?bank?part?of?homogeneous?earth?dam,?constructing?a?61?m?length?impermeable?barrier?and?so?on,?which?provide?scientific?basis?for?the?repairment?and?reinforcement?of?earth?rock-fill?dam?of?Dalin?reservoir

Key words: electrical resistivity tomography , earth rock-fill dam , leakage diagnosis

摘要： 为了能较准确诊断土石坝渗漏部位,基于介质电阻率参数对水较为敏感这一特性,将电阻率层析成像技术应 用于大林病险水库土石坝渗漏的诊断测试中,查明了扩建坝体黏土斜墙331??50m高程以上部分坝体及左岸岩体 中存在的渗漏通道,同时原均质土坝在高程329??0m以上的近右坝肩存在渗漏隐患。依据诊断结果提出了该病险 水库加固设计方案中需将331??50m以上坝体挖除、防渗帷幕向左岸延伸61m以及置换原均质土坝在高程329??0 m以上的近右坝肩部分坝体等建议。为保证大林病险水库除险加固的顺利实施提供了科学依据。

关键词: 电阻率成像, 土石坝, 渗漏诊断