摘要
海绵城市主要功能是实现雨水控制目标,但海绵城市在渗蓄水时会导致地面沉降等一系列地质问题。采用Terzaghi固结理论与GMS软件计算地下水流场相结合,形成水动力-力学耦合模型,模拟计算海绵城市渗蓄水时对地质环境地面沉降影响。海绵城市在降雨模式下,降雨强度大,降雨历时长对地面沉降影响较大;在渗蓄水多个回合后,对地面沉降影响最大。海绵城市透水铺张层和下垫层一定要考虑渗蓄水的风险,必须经过预测与评价使沉降值控制在不产生破坏的范围内。下垫层的土体强度不符合海绵体渗蓄水功能要求时,需采取措施加固。
The main function of sponge city is to achieve the goal of rainwater control,but the sponge city will lead to a series of geological problems such as land subsidence when it infiltrates and stores water.In this study,Terzaghi consolidation theory and GMS software are used to calculate the groundwater flow field,forming a hydrodynamic mechanical coupling model to simulate and calculate the impact of sponge city infiltration and storage on land subsidence of geological environment.In the rainfall mode of sponge city,the rainfall intensity is large and the long rainfall duration has a great impact on land subsidence;After several rounds of infiltration and impoundment,the impact on land subsidence is the largest.The risk of seepage and water storage must be considered for the pervious pavement and underlayer of sponge city,and the settlement value must be controlled within the range of no damage through prediction and evaluation.If the soil strength of the lower cushion does not meet the functional requirements of the cavernous body for seepage and water storage,construction measures shall be taken to reinforce it.
出处
《化工设计通讯》
CAS
2023年第1期165-167,共3页
Chemical Engineering Design Communications
基金
2021年度湖北省建设科技计划项目和建筑节能示范工程2021[2075]。
关键词
海绵城市
水动力学-力学耦合模拟
预测与评价
sponge city
hydrodynamic mechanical coupling simulation
prediction and evaluation