三峡库区万州和平广场滑坡区堆积体物质组成特征及其地质意义

SUBSTANCE CHARACTERISTICS AND SIGNIFICANCE OF ACCUMULATION OF HEPING SQUARE LANDSLIDE OF WANZHOU IN THE THREE GORGES RESERVOIR REGION

三峡库区万州和平广场滑坡区位于重庆市万州区主城区内,地处长江北岸,为长江与其一级支流苎溪河交汇处,被列为长江三峡工程库区重点勘察防治的四大滑坡之一。和平广场滑坡区地质体是包含人工堆积、崩滑堆积、残坡积与河流冲积等物质的混合成因的松散堆积体。和平广场滑坡区堆积体物质组成特征证实了“和平广场滑坡堆积体不具备同一的、大规模的滑坡成因特点,而是伴随三峡地区地壳缓慢抬升、长江河床下切过程中逐步堆积形成的”这一重要结论的正确性。它对和平广场滑坡区滑坡与塌岸防治工程有重要指导意义。

The Heping Square landslide zone of Wanzhou (for short HPLSZ) , in the Three Gorges reservoir region which is located on the north bank of Changjiang, is at the intersection of Changjiang and its branch Zhuxi river. It is one of the four major landslides in the Three Gorges reservoir region. The geological body of HPLSZ is a loose mixed accumulation, which includes human activity accumulation, collapse-slide accumulation, weathering residual deposits and alluvium. Substance characteristics of HPLSZ testify it true that accumulation of HPLSZ is not a large single one, but it had being accumulated step by step with the earth 's crust uplifting slowly while bed of Changjiang river cutting down. This is very important for the prevention of HPLSZ slide and bank collapse.