地理研究

地理研究 ›› 1997, Vol. 16 ›› Issue (4): 15-22.doi: 10.11821/yj1997040003

• 论文 • 上一篇    下一篇

三峡库区的新构造应力场及其对库岸滑坡滑动优势方向的影响*

陈洪凯1, 唐红梅1, 艾南山2   

  1. 1. 重庆交通学院岩土工程研究所 重庆 630074;
    2. 四川联合大学 成都 610064
  • 收稿日期:1996-11-11 修回日期:1997-01-17 出版日期:1997-12-15 发布日期:1997-12-15
  • 基金资助:
    *国家“八五”重点科技攻关项目(85160305(3))

NEOTECTONIC STRESE FIELD AND ITS EFFECTS ONTHE DOMINANT SLIDING DIRECTION OF LANDSLIDES IN THE THREE GORGES RESERVOIR REGION

Chen Hongkai1, Tang Hongmei1, Ai Nanshan2   

  1. 1. Inst. of Geotechnical Engng, Chongqing Jiaotong College, Chongqing 630074;
    2. Sichuan Union University, Chengdu 610064
  • Received:1996-11-11 Revised:1997-01-17 Online:1997-12-15 Published:1997-12-15

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摘要： 新构造应力场在研究区域边坡稳定性及地表水土流失等方面具有重要作用。该文用地貌学方法——Scheidegger法,研究了三峡库区的新构造应力场及其与库岸滑坡滑动的优势方向问题。库岸滑坡发育的优势方向主要与新构造应力场的Maxl剪切带密切相关。

关键词: 三峡库区, 新构造应力场, 地貌学方法——Scheidegger法, 滑坡滑动优势方向

Abstract: Neoteconic stress field (NSF), as one geologic agent, plays an important role in zonal slope stability analysis and soil erosion researches. NSF in the Three Gorges reservoir is presented by the Scheidegger method, one of geomorphologic method to identify NSF, in this paper. Principal compressive NSF go in the directions of NE52.1°, NE12.5°and NE45°respectively in the Chongqing area, the reservoir of east Sichuan and the Three Gorges area in the reservoir region, which control obviously the sliding directions of landslides along the banks of the reservoir. Sliding directions of landslides principally tally with the shear belt (Max1) of the NSF region of the reservoir, which is NE52.1° Then we discover that the dominant slide direction of landslides in the area tallies with the shear zone of NSF. Due to the acute angle between the principal compressive stress of the NSF and the Yangtze River valley is about 55°, tectonic stress OT- mainly plays roles of O3- of the reservoir slope, which can trigger landslides easily.

Key words: Three Gorges reservoir, neotectonic stress field (NSF), geomorphologic method-Scheidegger-method, dominant slide direction of landslide

PACS: 

  • P546