亭子口水利枢纽大园包崩滑体稳定性分析及工程治理措施

Stability Analysis and Treatment of Dayuanbao Landslide in Tingzikou Water Control Project

大园包崩滑体位于亭子口水利枢纽左坝肩,被左岸非溢流坝段切割成上、下游滑坡体。上滑体处在库首段,靠近发电引水管口和泄洪冲沙底孔附近,其上布置有左灌渠渠首建筑物和左岸管理码头;下滑体处在发电厂房、进厂公路、尾水渠及下游护岸左侧。工程布置,施工期施工活动,运行期库水位及地下、地表水等因素会影响该崩滑体的稳定性。在对该崩滑体进行稳定性分析的基础上,提出了防护及永久性工程支护措施,并根据监测结果进行补强或除险加固。

Dayuanbao Landslide Body locates in the left abutment of Tingzikou Water Control Project, and is divided as two sliding bodies in downstream and upstream respectively by left-bank non--overflow dam section. The upstream sliding body closes to the inlet of penstocks and bottom outlets, and the left-bank irrigation canal headwork and left port buildings are also arranged on upstream sliding body. The downstream body locates in the left side of powerhouse, access road, tailrace canal and downstream revetment. The stability of Dayuanbao Landslide Body is influenced by the engineering arrangement, the constructing activities during construction period, the reservoir water level during project operation, surface water and underground water. Based on the stability analyses, the protective measures and permanent engineering supporting measures are proposed. These treatment measures are also reinforced according to monitoring data.