摘要
用蒙脱石层间水化状态修正了土壤孔隙率的计算方程,以此建立蒙脱石层间脱水作用所产生的次要地面沉降量的数学表达式,并对无锡石塘湾地面沉降区进行了模拟计算。无锡石塘湾地区因蒙脱石层间释水所产生的次要地面沉降量为39.02 cm,占整个沉降量的19.51%,人工回灌后,次要地面沉降量变为36.04 cm,占整个沉降量的18.02%,表明人工回灌是阻止地面继续沉降的有效措施之一。计算表明,如果蒙脱石残余层间水全部释出,那么无锡石塘湾地区可能有117.39 cm的地面沉降空间。虽然这一结果在真实的外界环境下不可能实现,但对下一步就地面沉降灾害的治理、防治具有一定的警示作用。蒙脱石层间脱水作用及其对地面沉降影响的研究,可能对地面沉降趋势的预测具有启示作用。
This paper corrected the calculation equation of soil porosity by means of the hydrous states of montmofillonite interlayer water, then the mathematic expression was set up to calculate the amount of secondary land subsidence resultant from montrnorillonite interlayer dehydration. The model was applied to the Shitangwan land subsidence area, Wuxi City. The calculation results show that the amount of secondary land subsidence resultant from part interlayer water release of montmorillonite is 39.02 cm after grotmdwater exploitation, accotmting for 19.51% of the total cumulative amotmt of land subsidence,and is 36.04 cm after artificial injection, accounting for 18.02% of the total cumulative amount of land subsidence in the area. It is shown that artificial injection is one of the effective measures to prevent land subsidence from going on. It is also indicated that, if the remainder interlayer water in montmorillonite is wholly released, there would be 117.39 cm of land subsidence in the area in the future. Although it would be impossible to come to the result in the real geological condition, this would give us a caution to the prevention and assessment of land subsidence hazard. The research on montmorillonite dehydration and its effect on land subsidence would also show us a revelation to the prediction of land subsidence trend.
出处
《矿物学报》
CAS
CSCD
北大核心
2006年第1期15-21,共7页
Acta Mineralogica Sinica
基金
中国地质调查局项目(编号:200313000037)
中国地质调查局与南京市人民政府合作项目(编号:1212010511105)
关键词
蒙脱石
层间水
水化状态
土壤孔隙率
地面沉降
montmorillonite
interlayer water
hydrous state
soil porosity
land subsidence
