珠三角平原区软土分布与地面沉降相关性分析

Correlation analysis between soft soil distribution and land subsidence in the Pearl River Delta Plain

珠三角平原区地面沉降引发的问题日益突出、潜在危害巨大,给人民生命财产安全构成威胁,地面沉降成因机理值得研究。本文通过全面搜集地面沉降调查监测及岩土工程勘察与土工试验资料,统计了软土的物理力学性质和分布特征,分析了软土厚度与地面沉降速率关系,建立了回归方程,表明该区地面沉降与软土分布密切相关,且软土厚度与沉降速率呈幂函数关系。其可为珠三角平原区地面沉降防治提供技术参考。

The phenomenon of land subsidence in the plains of the Pearl River Delta (PRD) is causing serious problems at present and posing a threat to the safety of people's lives and property. Therefore, the genetic mechanism of land subsidence in the PRD is an important issue that is worth studying. This study collected land subsidence monitoring data, a large number of geotechnical engineering investigation reports and test data, and other statistics to determine the physical and mechanical properties of soft soil and the distribution characteristics, and to analyse the relationship between the thickness of soft soil and land subsidence rate. It established a regression equation to examine the effects of the return to a significant degree, which showed that land subsidence in the area is closely related to the soft soil, and that the thickness of soft soil and sedimentation rate assume the power function relationship. The findings provide a basis for the study of soft soil type land subsidence in the PRD plains.