堤防生态边坡砂质粉土综合改性试验研究  

Experimental study on comprehensive modification of sandy silty soil on ecological slope of dike

作　　者：李彤 吴鑫淼[1,2] 李琦 李楠楠 马骅 郄志红 LI Tong;WU Xinmiao;LI Qi;LI Nannan;MA Hua;QIE Zhihong(College of Urban and Rural Construction,Hebei Agricultural University,Baoding 071001,China;Key Laboratory of Water-Saving Agriculture in North China,Ministry of Agriculture and Rural Af fairs,Baoding 071001,China;China Water Resources and Hydropower Construction Project Bohai Consulting CO.,LTD.,Tianjin 300222,China;Hebei Steel-Concrete Composite Bridge Technology Innovation Center,Xingtai 054001,China)

机构地区：[1]河北农业大学城乡建设学院,河北保定071001 [2]农业农村部华北节水农业重点实验室,河北保定071001 [3]中国水利水电建设工程渤海咨询有限公司,天津300222 [4]河北省钢-混组合桥梁技术创新中心,河北邢台054001

出　　处：《林业与生态科学》2023年第2期195-201,共7页Forestry and Ecological Sciences

基　　金：国家自然科学基金项目(51809070);河北省水利科研与推广计划项目(2016-64)。

摘　　要：堤防边坡的生态治理是河道治理和水土保持工作的一项重要内容。针对白洋淀上游白沟河河道治理中,当地砂质粉土不能满足工程的力学指标以及生态边坡所要求的植生性能问题,在传统的水泥改性土技术的基础上,引入新型土壤固化剂和新型土壤调理剂,设计了水泥、新型固化剂及土壤调理剂3种外加剂不同用量水平的正交试验方案。通过土力学和高羊茅草种植试验测试了改性土的工程性能和植生特性,并利用扫描电镜对改性土的细观结构进行分析。试验结果表明,与原土相比,当水泥掺量为2%、土壤固化剂掺量为水泥用量的4%、土壤调理剂用量为4.5 g/m^(2)时,改性土28 d粘聚力提高7.73倍,内摩擦角提高0.64倍,叶绿素含量提高1.24倍,土体保水效果提高33%,能够满足生态边坡对土体的性能要求。Ecological management of embankment slope was an important part of river management,soil and water conservation.For the treatment of the Baigou River in the upper reaches of the Baiyangdian,the local sand silt couldn’t meet the mechanical index of engineering and the planting performance requirements of ecological slope.On the basis of traditional cement modified soil technology,new soil curing agent and new soil conditioner were introduced,orthogonal test scheme of different dosage levels of three admixtures of cement,new curing agent and soil conditioner were designed.The engineering properties and planting characteristics of the modified soil were tested by soil mechanics and grass planting experiments,and the microstructure of modified soil was analyzed by scanning electron microscopy.The test results showed that compared with the raw soil,when the cement mixture was 2%,the soil curing agent was 4%of the cement mixture,and the soil conditioner mixture was 4.5 g/m^(2),the 28 days cohesion increased by 7.73 times,the internal friction angle was increased by 0.64 times,the chlorophyll content was increased by 1.24 times,the soil water retention effect was increased by 33%.It could meet the performance requirements to soil of ecological slope.

关 键 词：生态边坡 堤防 白沟河 改性土 工程特性 植生性能 固化剂 

分 类 号：TV42[水利工程—水工结构工程] TV861