基于比奥固结理论的盐城市地面沉降模拟预测  

Simulation and prediction of Yancheng ground subsidence based on Bio-consolidation theory

作　　者：杜菁菁 张岩 骆祖江[3] 张庆 DU Jingjing;ZHANG Yan;LUO Zujiang;ZHANG Qing(Nanjing Center,China Geological Survey,Nanjing 210016,Jiangsu,China;Key Laboratory of Earth Fis-sure Geological Disaster,Ministry of Natural Resources,Nanjing 210018,Jiangsu,China;Hohai University,Nanjing 210098,Jiangsu,China)

机构地区：[1]中国地质调查局南京地质调查中心,江苏南京210016 [2]自然资源部地裂缝地质灾害重点实验室,江苏南京210018 [3]河海大学,江苏南京210098

出　　处：《华东地质》2025年第1期114-126,共13页East China Geology

基　　金：自然资源部地裂缝地质灾害重点实验室开放课题“荷载和地下水开采引发地面沉降地裂缝模拟预测三维变参数黏弹塑性全耦合模型研究(编号:EFGD20210507)”资助。

摘　　要：城市地面沉降可能会对建筑物和基础设施造成损坏,影响城市的整体稳定性和安全性。文章以江苏省盐城市区为研究对象,以比奥固结理论为基础,引入黏弹塑性土体本构模型,并考虑土体参数随应力状态的非线性变化,建立了盐城市建筑荷载和地下水开采与地面沉降三维变参数全耦合黏弹塑性模型。结果表明:在建筑荷载和地下水开采条件下,研究区地下水水位持续回升,整体出现回弹现象,但在建筑荷载较大的中心城区,地面回弹量较小,甚至出现轻微沉降,且2021—2023年产生的最大水平位移为15mm。研究结果可为盐城市防治和减轻地面沉降危害提供科学依据。Ground subsidence occurred in urban area may cause damage to buildings and infrastructure,af-fecting the overall stability and safety of the city.This paper established a three-dimensional variable parameter fully-coupled viscoelastic-plastic model of building loads and groundwater mining with ground subsidence in Yancheng,Jiangsu Province based on the theory of Bio-consolidation,introduced the viscoelastic-plastic soil con-stitutive model,and meanwhile took the nonlinear change of soil parameters with the state of stress into account.The results show that the groundwater level in the study area continually rises under the conditions of construc-tion loading and groundwater extracting,with an overall rebound phenomenon.However,in the centre of the city,where the building loads are high,the amount of ground rebound is small and even slight settlement occurs,and the maximum horizontal displacement produced over 10 years is 15 mm.The results of the study can provide sci-entific basis for the prevention and mitigation of ground subsidence hazards in Yancheng.

关 键 词：盐城市 地下水开采 地面沉降 建筑荷载 比奥固结理论 

分 类 号：P642.26[天文地球—工程地质学]