海底隧道超前预注浆注浆压力选择研究  

Discussion on Reasonable Pre-grouting Pressures for Qingdao Jiaozhou Bay Sub-sea Tunnel

作　　者：王明胜[1] 王全胜[1] 

机构地区：[1]中铁隧道集团有限公司,洛阳471009

出　　处：《现代隧道技术》2010年第2期15-18,23,共5页Modern Tunnelling Technology

摘　　要：根据水压测试并结合经验公式初步确定注浆压力,并采用离散单元数值法对不同压力下裂隙内压力衰减状况进行了分析,提出了压力修正意见。通过现场注浆试验和效果检验及开挖揭示表明,采用3-4 MPa的注浆压力在保证堵水和加固效果的同时不会明显击穿海底覆盖层。Empirical formulas were adopted to preliminarily determine the pressure of grouting and pressure attenuation in joint fissures were analyzed by means of discrete element numerical model under different grouting pressures.According to the analysis,revised grouting pressure were put forward.Through field grouting tests and effects check-up as well as examination by excavation,it was indicated that grouting pressure at 3~4 MPa will ensure water-stopping and reinforcement effect without apparent danger to break through the under-sea cover.

关 键 词：海底隧道 注浆压力 数值模拟 试验分析 

分 类 号：U455.49[建筑科学—桥梁与隧道工程]