大直径泥水盾构复合地层速凝浆液的同步注入技术.pdfVIP

35 3 V ol. 35 N o. 3 2011 6 JOU RN AL O F BEIJIN G JIAOT O NG U N IV ERSIT Y Jun. 2011 : 1673- 0291( 2011) 03-0033- 06 1, 2 2 2 洪开荣 , 杜闯东, 任成国 ( 1. , 100044; 2. , 471009) : 在大直径泥水盾构施工中, 由于大断面隧道所承受的浮 大和泥水对浆液的稀释及通过富 水复合地层等不利条件, 同步注浆效果大受影响. 本文结合正在施工的盾构隧道施工情况进行研究 分析, 通过对盾构原有注浆设备和管路优化改造, 由传统的同步注入单液水泥砂浆改造为同步注入 复合浆液, 达到了同步注入速凝浆液的目的, 并通过在施工中加强过程控制和采取辅助措施, 解决 了因同步注浆效果差造成的管片上浮及开裂等技术难题, 取得了很好的效果. : 泥水盾构; 大直径; 复合地层; 速凝浆液; 同步注浆; 管片上浮 : U455149 : A Technology for simultaneous injection of rapid-setting grout in complex strata:case study on large-diameter slurry shield 1, 2 2 2 H ON G K airong , D U Ch uangdong , REN Chengg uo ( 1. School of Civil Enginee ing , Beij ing Jiaotong U nive sity , Beij ing 100044, China; 2. China Railw ay T unnel G oup Co. , L td. , Luoyang 47 1009, Henan, China) Abstract:Due to t he la ge buoy ancy t hat the la ge c oss- sect ion tunnels bea ing, t he dilut ion of t he g out caused by slu y and t he bad condit ions of t he wate- ich complex st ata, t he eff ect of t he simul- t aneous g out ing in the bo ing of la ge-diamet e slu y shields is g eatly affected. In t he const uct ion of a shield-bo ed tunnel, t he o iginal g outing equipment and t he pipelines a e opt im ized and t he t adi- t ional simultaneous single-component g out is eplaced by simultaneous complex apid-sett ing g out . In the end, the p oblem of segment uplif t and t he segment c ack caused by the effect diff e ence of simul- t aneous g outing a e solve