黄土滑坡勘探技术的研究与应用
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摘要
黄土滑坡是黄土地区影响建筑工程稳定性的重要因素,采用合理、可靠、经济的勘探技术查清滑坡的地层结构、滑坡展布特征和滑面埋深,是滑坡勘查的关键。以某站场西侧的山坡变形破坏严重,分布有两个规模较大的古滑坡和填土区正在发生发展的新滑坡,共计3个滑坡为例,采用浅层地震勘查中的反射波法和折射CT方法查明浅表地层结构及滑坡展布特征和滑面埋深。勘查实践表明,采用多波地震勘查方法技术,特别是折射CT成像技术,解决浅表层的黄土滑坡勘查问题可得到精度和可靠性较高的效果,值得推广应用。
Loess landslides are the key factors for the influence to the stability of construction project in loess zone.The reasonable,reliable and economical exploration technology is the key for the exploration of loess landslides which can investigate clearly stratigraphic configuration,horizontal distribution characteristics and the depth of slip surface on landslide.This paper takes three landslides located in western certain station,which two landslides are large-scale ancient landslides and one is developing continuously in filling area,for instances to study shallow stratigraphic configuration,distribution characteristics and the depth of slip surface on loess landslide using shallow seismic reflection method and refraction CT method.The practical results on investigation show that the technology used to solve problems of shallow loess landslide by multiwave seismic exploration,especially imaging techniques with refraction CT,which have higher effectiveness,accurateness and reliability.The method is effective in practice and worth application.
Loess landslides are the key factors for the influence to the stability of construction project in loess zone.The reasonable,reliable and economical exploration technology is the key for the exploration of loess landslides which can investigate clearly stratigraphic configuration,horizontal distribution characteristics and the depth of slip surface on landslide.This paper takes three landslides located in western certain station,which two landslides are large-scale ancient landslides and one is developing continuously in filling area,for instances to study shallow stratigraphic configuration,distribution characteristics and the depth of slip surface on loess landslide using shallow seismic reflection method and refraction CT method.The practical results on investigation show that the technology used to solve problems of shallow loess landslide by multiwave seismic exploration,especially imaging techniques with refraction CT,which have higher effectiveness,accurateness and reliability.The method is effective in practice and worth application.
引文
[1]GB18306—2001中国地震动参数区划图[S].北京:中国标准出版社,2002.
[2]DZ/T0170—1997浅层地震勘查技术规范[S].北京:中国建筑工业出版社,1997.
[3]李彭,王山山.浅层地震反射方法在工程物探中的应用[J].物探化探计算技术,2004,26(3):227-230.
[4]李正文,赵志超.地震勘探资料解释[M].北京:地质出版社,1998.
[5]王辉,丁志峰.浅层地震勘探资料处理中的速度分析参数选取[J].地震地质,2006,28(4):597-603.
[2]DZ/T0170—1997浅层地震勘查技术规范[S].北京:中国建筑工业出版社,1997.
[3]李彭,王山山.浅层地震反射方法在工程物探中的应用[J].物探化探计算技术,2004,26(3):227-230.
[4]李正文,赵志超.地震勘探资料解释[M].北京:地质出版社,1998.
[5]王辉,丁志峰.浅层地震勘探资料处理中的速度分析参数选取[J].地震地质,2006,28(4):597-603.
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