摘要
针对目前带状塑料排水板处理地基固结计算近似采用砂井地基固结理论的不足,将带状排水板等效为形状接近的扁椭圆柱体,考虑排水板井阻、涂抹影响,基于椭圆柱坐标系理论给出了总平均固结度的解析计算式;依托于某围垦工程深厚淤泥软基础真空联合堆载预压相关资料,通过对预压加固过程中孔隙水压、沉降等相关数据监测分析,认为真空预压过程中存在漏气问题,膜下真空度与原设计值存在较大偏差,通过延长真空预压时间及增加堆载预压厚度以保证深厚淤泥软土的前期预沉降量,基于本文提出的带状排水板处理地基椭圆柱固结理论沉降计算分析,认为带状排水板的椭圆柱固结理论与实际沉降监测值基本吻合,便于排水板的椭圆柱固结理论在工程实际应用中的推广。
In this paper,the strip PVD is equivalent to the shape of the flat elliptic cylinder. Based on the theory of elliptic cylindrical coordinate system,this paper considers the impact of drainage plate Takai,smear effect of the new consolidation theory,and gives the total average degree of consolidation analytic formula and relies on the relevant data of the deep silt soft foundation of a reclamation project in our hospital before the vacuum combined with preloading by monitoring and analyzing the pore water pressure and settlement in the preloading process.By prolonging the vacuum preloading time and increasing the load preloading thickness to ensure the pre-settlement of deep silt soft soil,it is concluded that the Elliptic column consolidation theory of the strip drain plate is in agreement with the actual settlement monitoring value.
作者
黄朝煊
HUANG Chao-xuan(Zhejiang Design Institute of Water Conservancy and Hydroelectric Power,Hangzhou 310002,China)
出处
《中国农村水利水电》
北大核心
2018年第7期109-113,117,共6页
China Rural Water and Hydropower
基金
浙江省基础公益研究计划项目(LGF18E090004)
浙江省水利厅科技计划项目(RC1701)
浙江省水利水电勘测设计院科标业项目资助(B1609)
关键词
深厚淤泥软土
排水固结法
真空联合堆载预压
孔隙水压力
沉降
deep silt soft soil
drainage consolidation method
vacuum combined preloading
pore water pressure
settlement
