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常州市过量开采第Ⅱ承压含水层的水使水位大幅度下降,造成含水砂层压密和粘性土层固结而导致地面沉降。试验资料表明该区粘性土层的压缩性较低,它们的压密主要是由主固结阶段完成的。视压榨液,浸提液成分和含水层多年水质的变化,以及抽水时水质与氚量资料说明粘性土层释水在造成本区地面沉降中起着相当重要的作用。这种条件下,用对含水层水化学成分的检测来监视地面沉降的发生、发展是一个经济可靠的方法。
Changzhou over-exploitation of pressure aquifer Ⅱ pressure aquifer drastically decreased, resulting in water-tight sand and clay layer consolidation resulting in land subsidence. The experimental data show that the cohesive soil layer in this area is less compressible, and their compaction is mainly accomplished by the main consolidation stage. According to the changes of the water quality, the composition of the extraction liquid and the water quality in the aquifer for many years, and the data of the water quality and the tritium volume in the pumping water, it shows that the water release of the cohesive soil plays a very important role in causing the land subsidence in this area. Under these conditions, it is an economical and reliable method to monitor the occurrence and development of ground subsidence by testing the chemical composition of aquifer water.