中文摘要：

通过实际工程,研究降雨量、地下水位、排水隧洞流量的监测数据资料。对比实施地下排水工程措施前后滑坡体的地下水位监测结果,表明破碎岩质边坡中采用地下排水隧洞,可使坡体中的地下水位明显下降。分析坡体地下水位与降雨的相关性,表明所研究滑坡的地下水位上升一般滞后于降雨过程,但在有前期降雨积累时,后期的强降雨可能即时提高边坡地下水位而诱发滑坡。排水隧洞流量与降雨过程关系分析结果表明,各时段的排水隧洞流量变化与降雨过程基本同步,并且当降雨量大于某个阀值时,才会引起排水隧洞流量的变化。分析对比排水隧洞流量和坡体地下水位各自的变化过程,可以发现,降雨首先是引起排水隧洞的流量增加,而坡体地下水位上升有一定的时间滞后,即排水隧洞流量增加先于地下水位上升,表明排水隧洞的排水作用能有效地降低一次降雨过程可能引起的地下水位上升的最大高度。研究结果表明,在破碎岩质边坡中实施地下排水隧洞措施是合理有效的,对类似边坡的防灾治理可提供借鉴。

英文摘要：

The measured data of the groundwater level, rainfall and the drainage tunnel discharge about the landslide are studied. Compared with the data of the groundwater level monitored by artificial and automatic measures before and after the implementation of underground drainage works, it is shown that the slope groundwater level has declined after excavating the underground drainage tunnel in crushed-rock slope. By analyzing the correlation of the groundwater level and rainfall, it is shown that the rising of the groundwater level is generally lagged behind the rainfall process; and if there has any accumulation rainfall previously, the groundwater level may be raised immediately with the latter strong rainfall, and the landslide will be induced. By analyzing the relationship between the drainage tunnel discharge and rainfall, it presents that the change of the drainage tunnel discharge is basically synchronous with the rainfall. And only when the rainfall is larger than a certain threshold value, the tunnel drainage discharge will increase correspondingly. By studying the changes process both of the drainage tunnel discharge and the groundwater level, it is shown that the increase of the drainage tunnel discharge is earlier than the rising of the groundwater level. Therefore, the maximum height of the groundwater level can be effectively reduced for the drainage role of the drainage tunnel during a rainfall process. The correlation of the groundwater level, rainfall and the drainage tunnel discharge is discussed based on the monitored data; and it is shown that the underground drainage tunnel measures in crushed-rock slope are reasonable and effective. If any similar crushed-rock slope needs to be controlled, the underground drainage tunnel would be a good choice.