建宁西路过江隧道切削长江大堤抗滑桩施工技术  

Construction technology for cutting of anti-slip piles on the Yangtze River south embankment by the river crossing shield tunnel in Jianning west road

作　　者：王海峻 李福林 Wang Haijun;Li Fulin(Nanjing Public Project Construction Center,Nanjing 210019,China;China Railway 14th Bureau Group Large Shield Engineering Co.,Ltd.,Nanjing 211800,China)

机构地区：[1]南京市公共工程建设中心,江苏南京210019 [2]中铁十四局集团大盾构工程有限公司,江苏南京211800

出　　处：《山西建筑》2023年第11期137-140,共4页Shanxi Architecture

摘　　要：为了解决大直径穿江盾构直接切削大堤钢筋混凝土桩存在的大堤沉降、裂缝以及钢筋缠绕、卡壳盾构刀盘等问题,以建宁西路过江隧道盾构直接切削长江大堤钢筋混凝土抗滑桩为例,针对切削的施工技术重难点进行了分析。对盾构机进行刀盘滚齿互换、缩小了刀间距等适应性设计,对大堤MJS加固,在实验室模拟了切削过程,选用了刃宽19.1 mm的滚刀。在穿越阶段设置了每环的掘进速度、刀盘转速、切口水压、同步注浆量、二次注浆等掘进参数,并采用了自动实时测量和克泥效等措施,确保切削大堤抗滑桩的稳定性和安全性。In order to solve the problems of embankment settlement,cracks,steel bar winding,and jamming of shield tunneling cutter heads,which caused by the direct cutting of reinforced concrete piles on the Yangtze River embankment by large-diameter river crossing shield tunneling.This paper talked the direct cutting of reinforced concrete anti-slip piles on the Yangtze River south embankment by the river crossing shield tunnel in Jianning west road as an example,analyzed the key and difficult points of cutting construction technology.Adaptively designed the shield tunneling machine with interchangeable cutterhead and gear hobbing,reduced tool spacing,and reinforced the MJS of the embankment were used.The cutting process was simulated in the laboratory,and a 19.1 mm wide hob was selected.During the crossing stage,excavation parameters such as excavation speed,cutter head speed,incision water pressure,synchronous grouting amount,and secondary grouting were set for each ring,and measures such as automatic real-time measurement and mud control efficiency were adopted to ensure the stability and safety of the anti-skid pile of the cutting embankment.

关 键 词：过江盾构 切削 钢筋混凝土桩 

分 类 号：TU943.9[建筑科学—建筑技术科学]