摘要
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.
引文
[1]龚士良.上海地面沉降层次分析法研究[J].系统工程,1996,14(3):30-34.GONG S L. Study on Shanghai land subsidence by the analytic hierarchy process[J]. Systems Engineering, 1996,14(3):30-34.
[2]揭江,魏凤英,王双,等.珠江三角洲地区地面沉降调查评价报告[R].湛江:广东省地质局第四地质大队,2015:261-303.JIE J, WEI F Y, WANG S, et al. Report on the evaluation of landsubsidenceinthePearlRiverDeltaregion[R].Zhanjiang:The Fourth Geological Team of Guangdong Geological Bureau,2015:261-303.
[3]张琢.珠三角地区软基沉降分析[D].长沙:长沙理工大学,2012:1-7.ZHANGZ. AnalysisonsoftfoundationsettlementinthePearl River Delta region[D]. Changsha:Changsha University of Science and Technology, 2012:1-7.
[4]谢荣安,郑健生,周元华,等.珠江三角洲及周边地区地面沉降地质灾害监测成果报告[R].广州:广东省地质测绘院,2014:106-184.XIE R A, ZHENG J S, ZHOU Y H, et al. Report on the results ofgeologicaldisastermonitoringoflandsubsidenceinthePearl RiverDeltaandsurroundingareas[R].Guangzhou:Guangdong Geological Surveying and Mapping Institute, 2014:106-184.
[5]董好刚,黄长生,陈雯.珠江三角洲环境地质控制性因素及问题分析[J].中国地质,2012,39(2):539-549.DONG H G, HUANG C S, CHEN W. The controlling factors ofenvironmentgeologyinthePearlRiverDeltaeconomiczone andananalysisofexistingproblems[J].GeologyinChina,2012,39(2):539-549.
[6]卢耀东,李淑梅,梁家海.珠江三角洲经济区1:25万生态环境地质调查成果报告[R].广州:广东省地质调查院,2006:179-201.LU Y D, LI S M, LIANG J H. Report on the results of 1:250000ecological environmental geological survey in the Pearl River Delta economiczone[R].Guangzhou:GuangdongGeologicalSurvey,2006:179-201.
[7]唐益群,石亚朝,周洁.城市发展与地面沉降控制耦合协调模型研究[J].上海国土资源,2017,38(3):62-65,69.TANG Y Q, SHI Y C, ZHOU J. Coupling coordination model researchofurbandevelopmentandlandsubsidencecontrol[J].Shanghai Land&Resources, 2017,38(3):62-65,69.
[8]余革淼,李德洲,屈尚侠.广州市软土地面沉降特征分析[J].上海国土资源,2017,38(2):22-25.YU G M, LI D Z, QU S X. Analysis of the land subsidence characteristics of soft soil in Guangzhou[J]. Shanghai Land&Resources, 2017,38(2):22-25.