水下盾构隧道壁后浆液渗透扩散影响因素及扩散特征分析  

The Effect Factors and Characteristics of Slurry Infiltration Diffusion after Wall of Shield Tunnel under the Water

作　　者：龚彦峰[1,2] 唐曌 盛谦[3] 明冬雨 朱泽奇[2,3] GONG Yan-feng;TANG Zhao;SHENG Qian;MING Dong-yu;ZHU Ze-qi(China Railway Fourth Survey and Design Institute Group Co.,LTD.,Hubei Wuhan 430071,China;National and local Joint Engineering Research Center for Underwater Tunnel Technology,Hubei Wuhan 430071,China;State Key Laboratory of Rock and Soil Mechanics and Engineering,Wuhan Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Hubei Wuhan 430071,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中铁第四勘察设计院集团有限公司,湖北武汉430071 [2]水下隧道技术国家地方联合工程研究中心,湖北武汉430071 [3]中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,湖北武汉430071 [4]中国科学院大学,北京100049

出　　处：《防灾减灾学报》2020年第4期9-17,共9页Journal of Disaster Prevention And Reduction

基　　金：国家自然科学基金面上项目(51279202)。

摘　　要：浆液的渗透扩散特征是研究注浆效果以及管片受到影响的重要依据。从微观结构上详细分析了影响浆液扩散的主要因素,建立了渗透扩散注浆压力分布计算模型,并研究了不同注浆压力和地下水压力条件下浆液扩散特征以及浆液对管片的影响,得出以下结论:浆液的渗透扩散伴随着通道内结构拱的形成与破坏过程,地下水、通道截面形态、泥浆颗粒大小以及水灰比对结构拱的形成影响不同,而注浆压力对结构拱具有破坏作用;泥塞和结构拱的形成即为土体结构对浆液颗粒的过滤,滤过效应对浆液的渗透扩散具有重要的影响;地下水压力与浆液扩散范围之间呈线性负相关,地下水压力与浆液对管片产生的压力之间呈线性负相关;注浆过程中应当考虑浆液对管片产生的影响,防止管片损伤破坏。Slurry infiltration diffusion characteristics is the important basis of study of grouting quality and segment pressure.The main factors are analyzed in detail from microscopic structure.Grouting pressure distribution calculation model is established,and the characteristic of grout diffusion and segment pressure are studied under the condition of different grouting pressure and different groundwater pressure.The following conclusions:grout diffusion with infiltration channel formation and destruction process of arch structure;The formation of the arch structure and plug is the structure of the slurry particle filter,filter effects of grout diffusion has an important influence;There is a linear negative correlation between grout diffusion range and groundwater pressure,the same as to groundwater pressure and segment pressure;It should be considered that slurry infiltration have an effects on segment in the process of grouting to prevent damage of segment.

关 键 词：壁后注浆 影响因素 渗透扩散特征 注浆压力 地下水压力 

分 类 号：P315.9[天文地球—地震学] TU443[天文地球—固体地球物理学]