摘要
西安地裂缝近期超常活动，主要是长期过量抽汲深层承压水，引发地裂缝两侧地面不均匀沉降叠加到地裂缝正常活动过程中造成的。不均匀沉降量由地裂缝两侧土体松动程度不同造成的裂隙释水压密差异与两侧粘性土层厚度不同造成的孔隙释水压密差异共同构成。研究计算表明，地裂缝现今垂直活动量中，土体松动程度不同造成的裂隙释水压密量占有较大比例，而粘性土层厚度不同造成的孔隙释水压密差异所占有比例相对较小。
The extraordinary movement of geofractures in Xi’an recently is mainly caused by continuously excessive pumping deep-seated confined water that resulted in uneven surface subsidence on the both sides of geofractures and then superimposed to the normal movement of the geofractures. Compressive differences of fissure water-release caused by different loosening level of soil mass and pore-water release by different thickness of viscous soil layers in the both sides of the geofractures constitute the amount of the uneven subsidence. Calculation and researches indicated that the fissure-water release compression caused by the different loosening degrees of soil mass takes more portion in the amount of vertical movement of the geofractures than the compression diffetences of the pore-water release by the different thickness of viscous soil layers in recent years.
出处
《陕西地质》
1996年第A01期49-58,共10页
Geology of Shaanxi
关键词
地裂缝
超常活动
释水压密
松动破裂
量化分析
西安市
Geofracture
Extraordinary movement
Water release compression
Loosening break
Quantitative analysis
