填土荷载下深厚软基塑料排水板固结特性现场监测研究  

Field Monitoring Study on Consolidation Characteristics of Deep Soft Base Treated by Plastic Drainage Board under Filling Loading

作　　者：吴柏水 Wu Boshui(Fujian Geologic Surveying And Mapping Institute,Fuzhou,350011)

机构地区：[1]福建省地质测绘院,福州350011

出　　处：《福建地质》2024年第1期79-84,共6页Geology of Fujian

摘　　要：通过对填土荷载下塑料排水板地基处理深厚软基进行总沉降量、分层沉降量、孔隙水压力等现场监测表明:总沉降量随着填土高度的增大而逐渐增大,在填土较早阶段内,高度较小,沉降缓慢;而在快速填土的中期,沉降速率较高;填土基本结束时,沉降速率仍较高,沉降一直持续到240d时才开始趋缓。分层沉降量逐渐减小,主要沉降量与软土层分布厚度相一致;深层水平位移表明随着深度的增加,水平位移越来越小,最大水平位移位于地表处;横向差异沉降随着时间先逐渐增大,后逐渐减小。孔隙水压力变化与分层沉降和总沉降的时间、深度关系基本一致。塑料排水板处理后能够比较好地促进软土地基的固结。Throungh conducted on-site monitoring of the total settlement,layered settlement,pore water pressure,and other factors in the treatment of deep soft foundation with plastic drainage boards under fill loading.On site monitoring shows that the total settlement gradually increases with the increase of filling height.In the early stage of filling,the height is small and the settlement is slow;In the middle stage of rapid filling,the settlement rate is relatively high.When the filling is basically completed,the settlement rate is still relatively high,and it continues to slow down until 8 months later;The layered settlement gradually decreases,and the main settlement is consistent with the distribution thickness of the soft soil layer;Deep horizontal displacement indicates that as depth increases,the horizontal displacement decreases,with the maximum horizontal displacement located at the surface;The lateral differential settlement gradually increases and then decreases over time;The time and depth relationships between changes in pore water pressure and layered settlement and total settlement are basically consistent。Plastic drainage boards can effectively promote the consolidation of soft soil foundation after treatment。

关 键 词：填土荷载 软基 塑料排水板 固结 现场监测 

分 类 号：U416.1[交通运输工程—道路与铁道工程]