摘要
以江苏省某大桥锚碇基础TRD工法隔离墙在深厚富水粉砂及粉质黏土地层中的施工实例为研究对象,对施工所遇问题及处理流程、施工工效、施工参数、返浆率和质量检验等方面进行了研究和总结。研究结果表明:深厚富水粉砂及粉质黏土地层中容易出现切割箱被抱死的情况;合理制备和应用切割液,较长时间停机时适时进行链刀回转及切割箱拔插运动,可有效预防切割箱被抱死;先行切割、回撤切割和成墙搅拌速度均值分别为1.02,2.74,2.08m/h,成墙工效为4.81m/d, 134.58m3/d;先行切割时设备横推油缸推力、链刀切削力较大,各项参数均呈现明显的周期性;成墙搅拌时返浆率在60%~70%。
Taking the construction example of the TRD method isolation wall for the anchor foundation of a bridge in Jiangsu Province,which is located in a deep,water⁃rich silty sand and silty clay stratum,as the research object,this paper studies and summarizes the problems encountered during construction,as well as the handling process,construction efficiency,construction parameters,grout return rate,and quality inspection.The results show that the cutting box is easy to be locked in the deep water rich silty sand and silty clay stratum.The rational preparation and application of cutting fluid,as well as the timely rotation of the chain cutter and the insertion and extraction movement of the cutting box during extended downtime,can effectively prevent the cutting box from being locked.The average speed of advance cutting,rollback cutting and wall mixing is 102m/h,274m/h and 208m/h respectively,and the efficiency of wall construction is 481m/d and 13458m3/d.When advance cutting,the thrust of the horizontal oil cylinder and the cutting force of the chain cutter are large,and each parameter presents obvious periodicity.The replacement rate of slurry is 60%~70%during wall mixing.
作者
刘杰
马超
夏欢
贺祖浩
付金磊
周腾龙
LIU Jie;MA Chao;XIA Huan;HE Zuhao;FU Jinlei;ZHOU Tenglong(CCCC Second Harbour Engineering Co.,Ltd.,Wuhan,Hubei 430040,China;Key Laboratory of Large-span Bridge Construction Technology,Wuhan,Hubei 430040,China;Research and Development Center of Transport Industry of Intelligent Manufacturing Technologies of Transport Infrastructure,Wuhan,Hubei 430040,China;China Gezhouba Group Municipal Engineering Co.,Ltd.,Yichang,Hubei 443002,China)
出处
《施工技术(中英文)》
2026年第1期136-140,共5页
Construction Technology
基金
交通运输行业重点科技项目(2022-ZD4-060)。
关键词
桥梁工程
基础
TRD工法
粉砂地层
返浆率
bridges
foundations
TRD construction method
silt sand formation
return rate of mixed slurry
