陕西旬阳小河口——两河关段瓦缸寨滑坡地质概况及其稳定性分析
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摘要
为确保西安—安康二级公路路基质量,运用地质和地球物理(地震)两种勘探方法对滑坡区作地表和深部作地质勘探,查清滑坡对路基的影响程度。通过对该区的地质情况、滑坡体的成因及其稳定性等方面的分析和综合研究后认为:勘查区内新、老构造运动特征显著,是诱发滑坡的重要因素;滑脱面主要取决于断层面或层间千枚岩层等构造软弱带;区内该类滑坡体(或可疑滑坡体)是比较稳定的,相比之下,WT1和WT3勘探线南端滑坡体处较为稳定。
In order to ensure the roadbed quality of the second grade highway from Xi'an to Ankang and find out the influence of slide in Wagangzhai region on the highway roadbed, the geological and seismic geophysical exploration methods were used to explore the condition of earth surface and deep geology in this slide region. After an analysis and study on the geological condition in this region, the causes of sliding masses forming and its stability, it is considered that the old and recent outstanding movement is a very important factor causing landslide; slip surfaces lie on the structure weak zones mostly; these sliding masses in Wagangzhai region are comparatively stable, in contrast, the sliding masses locating on the south of WT1 and WT3 are most stable.
In order to ensure the roadbed quality of the second grade highway from Xi'an to Ankang and find out the influence of slide in Wagangzhai region on the highway roadbed, the geological and seismic geophysical exploration methods were used to explore the condition of earth surface and deep geology in this slide region. After an analysis and study on the geological condition in this region, the causes of sliding masses forming and its stability, it is considered that the old and recent outstanding movement is a very important factor causing landslide; slip surfaces lie on the structure weak zones mostly; these sliding masses in Wagangzhai region are comparatively stable, in contrast, the sliding masses locating on the south of WT1 and WT3 are most stable.
引文
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[2]胡广韬.滑坡动力学[M].北京:地质出版社,1995:1～42
[3]李新平,王涛,谢全敏等.高速公路滑坡稳定性分析及治理优化研究[J].岩土力学,2007,28(5):981～986
[4]王立朝,胡瑞林,张作辰等.黄土坡滑坡区临江崩滑体塌岸预测与防治[J].中国安全科学学报,2003,13(10):52～55
[5]张开鹏,刘新喜.降雨入渗对三峡库区堆积层滑坡稳定性的影响[J].中国安全科学学报,2006,16(6):4～8
[6]王恭先.滑坡防治方案的选择与优化[J].岩石力学与工程学报,2006,25(增2):3867～3873
[7]廖巍,刘新喜.三峡库区滑坡稳定性分析[J].中国安全科学学报,2004,14(9):104～107
[8]杨为民,吴树仁,张春山等.陕南岚皋县柳家坡滑坡形成机制研究[J].工程地质学报,2007,15(2):186～192
[9]刘新喜,晏鄂川,王鹏飞等.滑坡稳定性评价的非线性方法[J].中国安全科学学报,2003,13(1):34～36
[10]刘玉海,张骏,倪万魁等.延安城市工程地质[M].武汉:中国地质大学出版社,1988:81～121
[11]彭建兵,张骏.渭河盆地活动断裂与地质灾害[M].西安:西北大学出版社,1992:172～175
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