盾构壁后注浆对地表沉降影响模拟研究
PDF下载 (424)王冠琼,刘干斌*,邓岳保.盾构壁后注浆对地表沉降影响模拟研究[J].宁波大学学报(理工版),2014,27(03):97-102.DOI:
WANG Guan-qiong,LIU Gan-bin*,DENG Yue-bao.Numerical Simulation of Ground Settlement Considering Slurry Hardening Effect after Grouting of Wall Formation[J].Journal of Ningbo University(Natural Science & Engineering Edition),2014,27(03):97-102.DOI:
| Title: | Numerical Simulation of Ground Settlement Considering Slurry Hardening Effect after Grouting of Wall Formation |
| 作者: | 王冠琼, 刘干斌*, 邓岳保 |
| Author(s): | WANG Guan-qiong, LIU Gan-bin*, DENG Yue-bao |
| 关键词: | 注浆量; 注浆压力; 浆液硬化; 地表沉降; 数值模拟 |
| Keywords: | grouting volume; grouting pressure; slurry hardening effect; ground settlement; numerical simulation |
| 分类号: | U455.43 |
| 文献标识码: | A |
| 摘要: | 结合宁波轨道交通某区间隧道施工, 研究了盾构壁后注浆对地表沉降的影响, 考虑壁后注浆压力消散和浆液固结硬化过程, 采用FLAC3D有限元软件对开挖过程模拟计算, 分析了不同注浆量和不同注浆压力下的地表沉降变化规律以及浆液硬化作用对地表沉降和管片位移的影响规律, 并将地表沉降和拱顶位移的计算值和实测值进行对比分析. 结果表明: 本工程最佳注浆量4.0~5.0m3, 最佳注浆压力约0.3MPa; 硬化作用引起的地表沉降占总沉降约5%, 引起的管片位移占总位移约15%. 针对宁波土质, 合理确定注浆量和注浆压力能够有效控制地表沉降, 合理配制浆液, 实时监控注浆量、注浆压力和浆液强度, 能够有效控制管片的上浮和变形. |
| Abstract: | In order to study the effect of wall back grouting on ground subsidence, the process of excavation is simulated with a three-dimensional finite element software FLAC3D, in which the Ningbo rail transit subway tunnel construction is combined, and the wall back grouting pressure dissipation and slurry concretion process is considered. The ground surface subsidence under varying grouting pressure and the slurry hardening effect on the law of ground settlement are analyzed. Comparisons between the calculated value of surface subsidence and the corresponding measured value are made. The results show that, considering the soil characteristics in Ningbo, the grouting pressure can effectively be used to control the surface settlement, and the engineering optimum grouting amount is 4.0~5.0m3, the engineering optimum grouting pressure is about 0.3MPa, the surface hardening induced settlement in total settlement is about 5%, and induced segment displacement in total displacement of about 15%. The good combination of slurry, real-time monitoring of grouting pressure and grout strength can effectively control the floating of segment and deformation |
| 参考文献 /References: | [1].邹. 盾构隧道同步注浆技术[J]. 现代隧道技术, 20031):26-30. [2].徐小华. 盾构管片壁后注浆作用机理的数值解析[J]. 西部探矿工程, 20081):169-172. [3].张云, 殷宗泽, 徐永福. 盾构法隧道引起的地表变形分析[J]. 岩石力学与工程学报, 20023):388-392. [4].万战胜, 朱岱云, 夏永旭. 盾构隧道壁后注浆对地表沉降影响数值模拟研究[J]. 河北工业大学学报, 2011,1):110-113. [5].邓宗伟, 陈建平, 冷伍明. 盾构隧道壁后注浆作用机理的计算研究[J]. 塑性工程学报, 2005,6):114-117. [6].宋成辉. 软土地层地铁盾构通用环管片结构设计研究[J]. 地下空间与工程学报, 2011,4):733-740. [7].藤田圭一. 从基础工程角度看盾构掘进法—–地层的沉降与松动[J]. 隧道译丛, 1985(5):49-63. [8].魏纲, 魏新江, 洪杰. 盾构隧道壁后注浆机理及其对周边环境的影响[J]. 防灾减灾工程学报, 2010, S1:299- 304.何炬, 杨有海, 陈达. 深圳地铁盾构施工注浆机理与参数分析[J]. 低温建筑技术, 200910):108-109. [9].江玉生, 宋晓兵, 江华. 土压平衡盾构施工中同步注浆与地表沉降的关系[]. [2011-08-03]. http://epub. cnki.net/kns/detail/detail.aspx?FileName=SZJS201108001060&DbName=CPFD2011. [10].胡欣雨, 张子新. 一般应力状态下泥浆渗入对泥水盾构开挖面土体剪切强度影响分析[J]. 岩石力学与工程学报, 2009, 28(5):1027-1036.张莎莎, 戴志仁, 白云. 盾构隧道同步注浆浆液压力消散规律研究[J]. 中国铁道科学, 20123):40-48. [11].袁小会, 韩月旺, 钟小春等. 盾尾注浆硬性浆液固结变形数值计算模型构建[J]. 岩土力学, 2012, 33(3):925- 932Numerical Simulation of Ground Settlement Considering Slurry Hardening Effect after Grouting of Wall Formation [12].WANG Guan-qiong, LIU Gan-bin*, DENG Yue-bao [13].( Institute of Geotechnical Engineering, Ningbo University, Ningbo 315211, China ) [14].Abstract: In order to study the effect of wall back grouting on ground subsidence, the process of excavation is simulated with a three-dimensional finite element software FLAC3D, in which the Ningbo rail transit subway tunnel construction is combined, and the wall back grouting pressure dissipation and slurry concretion process is considered. The ground surface subsidence under varying grouting pressure and the slurry hardening effect on the law of ground settlement are analyzed. Comparisons between the calculated value of surface subsidence and the corresponding measured value are made. The results show that, considering the soil characteristics in Ningbo, the grouting pressure can effectively be used to control the surface settlement, and the engineering optimum grouting amount is 4.0~5.0m3, the engineering optimum grouting pressure is about 0.3MPa, the surface hardening induced settlement in total settlement is about 5%, and induced segment displacement in total displacement of about 15%. The good combination of slurry, real-time monitoring of grouting pressure and grout strength can effectively control the floating of segment and deformation. |
| 备注/Memo: | 收稿日期: 2013?12?04. 宁波大学学报（理工版）网址: http://journallg.nbu.edu.cn/ 基金项目: 宁波市重大择优委托项目（2011C51011）. 第一作者: 王冠琼（1988－）, 女, 浙江宁波人, 在读硕士研究生, 主要研究方向: 地下工程数值模拟. E-mail: grace880701@163.com *通信作者: 刘干斌（1976－）, 男, 江西吉安人, 教授, 主要研究方向: 岩土工程. E-mail: liuganbin@nbu.edu.cn 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
