抽水和建筑荷载双重作用下的地面沉降模型 - 地球科学与环境学报.pdf

30 1 No .1Vol .3 0 2 0 0 8 3 　Journal of Earth Sciences and Environment 　 Mar.2 0 0 8 1 1 2 3 赵　慧 , 钱　会 , 李　渊 , 彭建兵 (1. , 710054;2. , 710089;3. , 710054 ) :, , Jacob , , 。, , 。, , , 。 :;;;;; :P 42.2 ;X143.9;P 41.2　:A　:1 72- 5 1(2008)01-0057-03 Land Subsidence Model under Dual Effects of Groundwater Pumping and Construction Loading 1 1 2 3 ZHAO Hui , QIAN Hui , LI Yuan , PENG Jian-bing (1.S chool of Env ironmental S ciences and Engineering, Chang an University , X i an 710054, Shaanxi, China; 2.Board of Manag ement, X i an Yan liang National Aviation H i-Tech Ind strial Base, X i an 710089, Shaanx i, Ch ina;3.S chool of Geological Engineering and S rvey ing, Chang an University , X i an 710054, Shaanxi, China) Abstract:Based on conservation of mass, this paper deduced a theoretical model for land subsidence caused by const ruction loading on unconsolidated strata, and compared it w ith the elastic model for subsidence controlled by groundwater pumping.The results show that the mechanism expressions of tw o models are accordant, but their hydrodynamic essences are different,that is, the former is caused by dissipation of pore w ater pressure, and the later is for the sake of draw dow n.Calculation model for subsidence under the dual effects of pum ping and loading is given according to superposition principle.Taking draw dow n as main factor, tw o subsidence processes w ith different hydrodynamic essences can be overlaid effectively. Key words:conservation of mass;construction loading;groundwater pumping;dual effects;superposition principle;model for s