顶管隧道工程触变泥浆性能试验及减阻技术研究  

Test of Thixotropic Slurry Properties and Study of Resistance-Reducing Technology for Pipe Jacking Tunnel Construction

作　　者：王明胜[1] 刘大刚[2,3] 

机构地区：[1]中铁隧道集团有限公司,洛阳471000 [2]西南交通大学土木工程学院,成都610031 [3]西南交通大学交通隧道工程教育部重点实验室,成都610031

出　　处：《现代隧道技术》2016年第6期182-189,共8页Modern Tunnelling Technology

基　　金：中国中铁股份有限公司科技创新计划重大课题(2013-重大-13)

摘　　要：文章依托郑州市红专路下穿中州大道顶管隧道工程,通过室内泥浆性能试验,研究了膨润土、CMC、纯碱和PHP四种材料含量的改变对触变泥浆性能的影响规律,并由此确定了触变泥浆的配合比。然后,结合现场施工情况,研究了触变泥浆制备、注浆设备选型、注浆参数设计、梅花形注浆孔位布置、同步注浆和二次注浆施工以及管节表面涂蜡等减阻技术。最后,通过土压力理论计算和现场实测得出结论:采取减阻技术措施后,机动车大断面隧道的最大顶推力和平均摩阻系数分别减小了56.3%和62.3%;非机动车隧道的最大顶推力和平均摩阻系数分别减小了56.7%和60.9%,减阻技术应用效果良好。Based on the Hongzhuanlu jacking pipe tunnel project underneath Zhongzhou Avenue in Zhengzhou City, we studied the influence of changing contents of materials--including bentonite, CMC, soda ash and PHP--on the properties of a thixotropic slurry, then determined its mix proportions. Furthermore, we also studied the technolo- gies of slurry preparation, grouting equipment selection, grouting parameter design, the arrangement of grouting holes, synchronous grouting and secondary grouting and surface waxing of tunnel elements per the situation of field construction. The theoretical calculation and field testing showed that after applying resistance reducing technolo- gies the values of the maximum jacking force and the average friction resistance coefficient for the vehicle tunnel tube with a large cross section is reduced by 56.3% and 62.3%, respectively, and 56.7% and 60.9% for the non-ve- hicle tunnel tube with a small cross section, which indicates that these technologies are effective.

关 键 词：触变泥浆 矩形顶管隧道 泥浆性能试验 减阻效果 

分 类 号：U451.5[建筑科学—桥梁与隧道工程]