新型砌块重力式挡土墙墙体裂隙渗流规律研究  

Fissure seepage regularity in new type block retaining walls

作　　者：张信贵[1] 潘政宇 严利娥[1] 汪海蕾 韩伟 张懿丹 ZHANG Xingui;PAN Zhengyu;YAN Li′e;WANG Hailei;HAN Wei;ZHANG Yidan(School of Civil Engineering,Guangxi University,Nanning 530004,China;Guangxi Communications Design Group Co.,Ltd,Nanning 530000,China;Design and Research Institute of Guangxi University,Nanning 530004,China)

机构地区：[1]广西大学土木建筑工程学院,广西南宁530004 [2]广西交通设计集团有限公司,广西南宁530000 [3]广西大学设计研究院,广西南宁530004

出　　处：《混凝土》2022年第3期156-159,163,共5页Concrete

基　　金：国家自然科学基金项目(51268003,59868001);广西教育厅科研项目(2019KY0035);广西大学博士启动项目(XBZ190879)。

摘　　要：为了研究新型砌块重力式挡土墙全断面排水规律及墙体裂隙堵塞对排水效率的影响,采用缩尺模型进行试验。试验研究结果表明,水位高度和墙体裂隙率是影响挡土墙排水效率的两个关键性因素。挡土墙等效渗透系数随着水位高度增加而增大;挡土墙等效渗透系数的变化与裂隙堵塞程度呈正比;垂直裂隙排水效果优于水平裂隙,水平裂隙会造成地下水一部分回流,降低挡土墙整体排水效率;设置土工布虽然会对挡土墙的等效渗透系数减小约20%,但可有效防止墙后土颗粒流失堵塞墙体裂隙;挡土墙在堆叠排块时应错缝堆叠,避免出现直缝或堆叠间隙相隔较大。Using scale model to test the whole section drainage law of new block gravity retaining wall and the influence of wall crack plugging on drainage efficiency.The results show that the water level and the wall crack rate are two key factors affecting the drainage efficiency of retaining wall.The equivalent permeability coefficient of retaining wall increases with the increase of water level.The change of equivalent permeability coefficient of retaining wall is directly proportional to the degree of crack plugging.The drainage effect of vertical fissure is better than that of horizontal crack,which will cause part of groundwater backflow and reduce the overall drainage efficiency of retaining wall.Although the equivalent permeability coefficient of retaining wall will be reduced by about 20%by setting geotextile,it can effectively prevent the seepage the retaining wall cracks are blocked by the loss of soil particles behind the retaining wall.When stacking blocks,the retaining wall should be stacked with staggered joints to avoid straight joints or large stacking gaps.

关 键 词：装配式挡土墙 挡土墙模型试验 裂隙渗流 挡土墙排水 等效渗透系数 

分 类 号：TU528.7[建筑科学—建筑技术科学]