水泥土防渗墙工艺性试验参数比选及质量控制  

Comparative selection of technological test parameters and quality control of soil-cement cutoff wall

作　　者：蔡娟 张鹏[2] 于金龙 CAI Juan;ZHANG Peng;YU Jinlong(Guanyun County Water Conservancy Project Quality Supervision Station,Lianyungang 222200,China;Lianyungang Water Conservancy Bureau,Lianyungang 222200,China;Guanyun County Water Conservancy Well Drilling Engineering Team,Lianyungang 222200,China)

机构地区：[1]灌云县水利工程质量监督站,江苏连云港222200 [2]连云港市水利局,江苏连云港222200 [3]灌云县水利局打井工程队,江苏连云港222200

出　　处：《江苏水利》2023年第4期20-23,27,共5页Jiangsu Water Resources

摘　　要：水泥搅拌防渗墙具有工艺成熟、施工质量可控、造价经济等优点,广泛应用于防渗工程,易取得较好的墙体强度、均匀性、防渗效果。但水泥搅拌防渗墙对当地土质、土层性质敏感性较强,如对淤泥质黏土来说,不易取得较高的墙体均匀性,对富含砂、石的土层来说,常常钻进困难。阐述了新沂河左堤防渗工程在第一次墙体工艺性试验时,无法取得合格的试验成果。通过地质复勘,纠正地质勘察成果与实际情况的偏差,调整水泥搅拌防渗墙桩机型号、电机功率、浆气压力、钻进下沉与提升次数、行程时间等施工参数,并对特殊位置采取扩大防渗体补偿等处理手段,获取试验成果,推进工程实施。Cement mixing cutoff wall has the advantages of mature technology,controllable construction quality,low cost and so on.It is widely used in anti-seepage engineering and easy to achieve better wall strength,uniformity and anti-seepage effect.However,the cement mixing cutoff wall is sensitive to the properties of soil and soil layer.For example,for mucky clay,it is not easy to achieve high wall uniformity,and for sand and stone rich soil layers,it is often difficult to drill.This paper describes the failure of the first construction test of Xinyi River project.Through geological survey,the deviation between geological survey results and the actual situation is corrected,construction parameters of cement mixing cutoff wall such as pile type number,motor power,slurry pressure,drilling and lifting times,travel time,etc.are adjusted,and treatment methods such as expanding impervious body compensation are adopted for special positions to obtain test results and promote project implementation.

关 键 词：水泥搅拌防渗墙 试验成果 施工参数 新沂河 

分 类 号：TV523[水利工程—水利水电工程]