盾构隧道下穿砌体结构的洞内深孔注浆加固参数分析  

Analysis on Reinforcement Parameters of Deep-hole Grouting in Tunnel for Shield Tunnel Undercrossing Masonry Structure

作　　者：汤劲松 李梓亮 赵书银[3] 姜景双 TANG Jinsong;LI Ziliang;ZHAO Shuyin;JIANG Jingshuang(School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;Key Laboratory of Roads and Railway Engineering Safety Control(Shijiazhuang Tiedao University),Ministry of Education,Shijiazhuang 050043,China;China Railway 16th Bureau Group Co.LTD.,Beijing 100018,China;China Railway 16th Bureau Group Beijing Metro Engineering Construction Co.LTD.,Beijing 101149,China)

机构地区：[1]石家庄铁道大学土木工程学院,河北石家庄050043 [2]道路与铁道工程安全保障省部共建教育部重点实验室(石家庄铁道大学),河北石家庄050043 [3]中铁十六局集团有限公司,北京100018 [4]中铁十六局集团北京轨道交通工程建设有限公司,北京101149

出　　处：《应用基础与工程科学学报》2022年第2期421-433,共13页Journal of Basic Science and Engineering

基　　金：河北省自然科学基金项目(E2014210021);河北省重点学科建设项目(岩土工程)。

摘　　要：以盾构隧道下穿砌体结构房屋为背景,以墙体最大拉应力增量为评价指标,分析洞内深孔注浆加固技术中径向加固半径、建筑物前后加固范围和隧道断面加固范围这3个主要技术参数在盾构隧道下穿砌体结构过程中对砌体结构的影响,并采用正交试验方法,确定主要技术参数影响洞内深孔注浆加固效果的主次顺序.结果表明:洞内深孔注浆技术可以对隧道周围的地层进行有效加固,减少盾构隧道施工对上部砌体结构房屋的扰动;对隧道周围进行全断面注浆时,加固效果最好;径向加固半径超过5m,建筑物前后加固范围超过1.5倍隧道直径时,注浆加固效果不再明显;在影响洞内深孔注浆加固效果的主要技术参数中,隧道断面加固范围对加固效果的影响最大,其次为径向加固半径,影响最小的为建筑物前后加固范围.Taking the shield tunnel undercrossing masonry structure building as an engineering background and the maximum tensile stress increment of the wall as an evaluation index,the effects of three main technical parameters of deep-hole grouting reinforcement technology in tunnel on masonry structure building during shield tunnel undercrossing were discussed.The main technical parameters include radial reinforcement radius,reinforcement range front and rear building and reinforcement range of tunnel cross section.The orthogonal test method was used to determine the important order of main technical parameters which influence the strengthening effect of deep-hole grouting.The results show that the stratum surrounding tunnel is effectively reinforced by deep-hole grouting technology in tunnel which can reduce disturbance to masonry structure building because of shield tunneling.The strengthening effect is the best when the whole cross section surrounding tunnel is grouted.The strengthening effect of grouting is no more significant when the radial reinforcement radius is more than 5 m and the reinforcement range around the building is over 1.5 times of tunnel diameter.Among three main technical parameters which influence strengthening effect of deep-hole grouting in tunnel,the reinforcement range of tunnel cross section expresses the largest effect on strengthening,the second is the radial reinforcement radius,and the least impact is the reinforcement rang around the building.

关 键 词：盾构隧道 下穿建筑物 砌体结构 深孔注浆 加固参数 正交试验 数值模拟 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]