Research on Predictable Approach to Land Subsidence Based on TIN Model

Abstract:

The most common predictable approach to land subsidence is to choose, analyze and forecast a representative deformation observation points .If an uneven land subsidence (settlement) comes into being, the settlement rate of deformation observation points will be different. The analysis of the individual subsidence observation points can not reflect the true ground subsidence in the region . Instead, the comprehensive analysis of the information about all the deformation observation points can more objectively reflect the overall settlement of the region. This study makes use of all the observation points to establish a triangular mesh deformation, and uses the superposition of the Terrain surface TIN model and the design surface TIN model to obtain the earthvolume in the two surface triangular elements. Through the earthvolume, the size of the overall settlement of the ground situation can be indirectly reflected in order to adopt appropriate preventive measures . This paper studies the Earthvolume as a research object, employs Gompertz curve model to fit the data and design the forecast model to make accurate assessments.The research shows that this method can reflect the overall total ground settlement,and explore the laws of the land subsidence when an uneven settlement arises.

• Periodical: Advanced Materials Research (Volumes 488-489)
• Pages: 1488-1492
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.488-489.1488
• Online since: March 2012
• Authors: Qing Hai Wu
• Keywords: Accuracy Assessment, Earthvolume, Forecast, Gompertz

References

[1] Yue Jianping, Fang Lu .Urban ubsidence Monitoring Research Progress[J].Bulletin of Surveying and Mapping,2008.(3)1-4.

[2] Yang Min. 220KV high-pressure substation foundation subsidence accident analysis and strengthening practice[J]. Learned journal of Huaihai Institute of Technology2007.(4)65-68.

[3] Wang Wei, Wang WeiAn. The irregular triangulation formation and application in earthvolume calculation[J]. South-to-North Water Transfers and Water Science & Technology 2007.(5) 35-38.

[4] Zhou Qiming ,Liu Xuejun.Digital terrain analysis[M].Beijing:Science Publishing Company，2006.

[5] Wu Qinghai. Research of building subsidence prediction methods based on the non-equidistant model [J]. Science of Surveying and Mapping，2008.(3)59-61.

[6] Qiao Xiangming. The research of curve fitting method [J]. Shandong transportation technology,1999,(1)75-78

[7] Zhao Hongbin. Water supply pipe system theory and analysis [M ].Beijing: China Architecture & Building Press,2003.