浅埋矩形顶管群密贴施工的顶推力分析研究
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摘要
为明确矩形顶管群密贴施工中顶管顶推力的发展规律与影响因素,以圆形顶管顶推力计算理论为基础,依托实际的试验工程背景,分7个工况分别进行顶推力的统计分析。通过多工况理论估算与实测数据对比,验证管顶推力的实测值与理论值在规律上的一致性,同时得出该理论值较实测值偏小的结论。针对试验工程中出现的减摩失效、顶管背土、姿态异常等问题展开研究,通过对比分析不同工况实测顶推力发展规律,最终得出:就本工程而言,减摩泥浆的减摩效果明显,顶推力减小约38.2%;顶管背土与顶管姿态对顶推力具有较大的负面影响,其中,顶管背土导致每节顶推力增加约16.7%,顶管姿态异常引起顶推力额外增加17.8节的理论推力。
Based on the jacking force theory used in circular pipes, the development law and influencing factors of thrust force of rectangular pipe jacking tunnel group are analyzed through 7 working conditions in actual experimental engineering. The uniformity of the monitored pipe jacking force and theoretical values is verified by comparison between theoretical estimation and monitored data, and it is concluded that the theoretical values are smaller than monitored data. And then the problems of friction reduction, the phenomenon of pipe carrying soil, and attitude deviation are studied. Finally, by comparatively analyzing the development law of thrust force in different working conditions, it is concluded that:(1) The friction reduction effect of lubricating mud is obvious, i.e. the thrust force is reduced by about 38.2%.(2) The phenomenon of pipe carrying soil and attitude deviation greatly affect the thrust force, wherein the thrust force of each segment induced by the phenomenon of pipe carrying soil is increased by about 16.7%, and that induced by attitude deviation is increased by 17.8 of pipe force.
Based on the jacking force theory used in circular pipes, the development law and influencing factors of thrust force of rectangular pipe jacking tunnel group are analyzed through 7 working conditions in actual experimental engineering. The uniformity of the monitored pipe jacking force and theoretical values is verified by comparison between theoretical estimation and monitored data, and it is concluded that the theoretical values are smaller than monitored data. And then the problems of friction reduction, the phenomenon of pipe carrying soil, and attitude deviation are studied. Finally, by comparatively analyzing the development law of thrust force in different working conditions, it is concluded that:(1) The friction reduction effect of lubricating mud is obvious, i.e. the thrust force is reduced by about 38.2%.(2) The phenomenon of pipe carrying soil and attitude deviation greatly affect the thrust force, wherein the thrust force of each segment induced by the phenomenon of pipe carrying soil is increased by about 16.7%, and that induced by attitude deviation is increased by 17.8 of pipe force.
引文
[1] 彭立敏, 王哲, 叶艺超, 等. 矩形顶管技术发展与研究现状[J]. 隧道建设, 2015, 35(1): 1.PENG Limin, WANG Zhe, YE Yichao, et al. Technological development and research status of rectangular pipe jacking method[J]. Tunnel Construction, 2015, 35(1): 1.
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[4] 喻军, 李元海. 顶管泥浆套的物理性质对顶推力的影响[J]. 土木工程学报, 2015, 48(增刊2): 327.YU Jun, LI Yuanhai. Effect of physical properties of mud screen of pipe-jacking on jacking forces[J]. China Civil Engineering Journal, 2015,48(S2): 327.
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[6] 陈孝湘, 张培勇, 丁士君,等. 大口径三维曲线顶管顶力估算及实测分析[J]. 岩土力学, 2015, 36(增刊1): 547.CHEN Xiaoxiang, ZHANG Peiyong, DING Shijun, et al. Jacking force estimation and measured data analysis of 3D curved long distance and large diameter pipe jacking[J]. Rock and Soil Mechanics, 2015, 36(S1): 547.
[7] 周舒威, 夏才初, 葛金科,等. 黏土中超大直径顶管开挖面主动极限支护压力计算方法[J]. 岩土工程学报, 2013, 35(11): 2060.ZHOU Shuwei, XIA Caichu, GE Jinke, et al. An approach for calculating active limit support pressure of tunnel face of large-diameter pipe jacking in cohesive soils[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(11): 2060.
[8] 张治国, 张孟喜, 王卫东. 顶管推进引起施工场地竖向附加荷载分析[J]. 岩土力学, 2014, 35(增刊2): 121.ZHANG Zhiguo, ZHANG Mengxi, WANG Weidong. Analysis of soil vertical additional loads induced by pipe jacking construction[J]. Rock and Soil Mechanics, 2014, 35(S2): 121.
[9] 魏纲, 徐日庆, 屠玮. 顶管施工引起的土体扰动理论分析及试验研究[J]. 岩石力学与工程学报, 2004, 23(3): 476.WEI Gang, XU Riqing, TU Wei. Testing study and analysis of soil disturbance induced by pipe jacking construction[J]. Chinese Journal of Rock Mechanics and Engineering, 2004, 23(3): 476.
[10] 喻军, 龚晓南. 考虑顶管施工过程的地面沉降控制数值分析[J]. 岩石力学与工程学报, 2014(增刊1): 2605.YU Jun, GONG Xiaonan. Numerical analysis of surface settlement control considering pipe jacking construction process[J]. Chinese Journal of Rock Mechanics and Engineering, 2014(S1): 2605.
[11] 景路, 袁聚云, 袁勇. 顶管工程中的地层损失参数和土体变形计算[J]. 岩土力学, 2013, 34(增刊1): 173.JING Lu, YUAN Juyun, YUAN Yong. Ground loss parameter and soil deformation in pipe jacking[J]. Rock and Soil Mechanics, 2013, 34(S1): 173.
[12] 张建安. 矩形顶管顶推力对上部地表位移影响规律研究[J]. 城市道桥与防洪, 2017(8): 266.ZHANG Jian′an. Study of upper surface displacement affected by thrust of rectangular pipe jacking[J]. Urban Road Bridges and Flood Control, 2017(8): 266.
[13] 林强强. 矩形顶管引起地面变形的实测分析与控制研究[D]. 上海: 同济大学, 2008.LIN Qiangqiang. Research on measurement and control of ground deformation caused by rectangular pipe jacking[D]. Shanghai: Tongji University, 2008.
[14] 林越翔, 彭立敏, 吴桂航,等. 仿矩形顶管管壁摩阻力理论公式的探讨[J]. 现代隧道技术, 2017, 54(4): 180.LIN Yuexiang, PENG Limin, WU Guihang, et al. Discussion of a theoretical formula for the friction resistance of a pipe wall in quasi-rectangular pipe jacking[J]. Modern Tunnelling Technology, 2017, 54(4): 180.
[15] 韩冰, 阿力普江·杰如拉, 王述红, 等. 基于普氏卸荷拱理论的矩形顶管顶推力预估方法研究[J]. 建筑设计管理, 2017, 34(9): 84.HAN Bing, ALIPUJIANG Jierula, WANG Shuhong, et al. Research on estimation method of rectangular pipe jacking force based on Platts unloading arch theory[J]. Architectural Design Management, 2017, 34(9): 84.
[16] 给水排水工程顶管技术规: CECS 246—2008[S]. 北京: 中国计划出版社, 2008.Technical specification for pipe jacking of water supply and sewerage engineering: CECS 24-2008[S].Beijing: Chinese Planning Press, 2008.
[17] 洪开荣. 我国隧道及地下工程发展现状与展望[J]. 隧道建设, 2017, 37(2): 123.HONG Kairong. Development and prospects of tunnels and underground works in China in recent two years[J]. Tunnel Construction, 2017, 37(2): 123.
[18] 高毅, 冯超元, 程鹏. 浅埋矩形顶管的“整体背土效应”研究[J]. 岩土工程学报, 2018, 40(10): 1936.GAO Yi, FENG Chaoyuan, CHENG Peng. Study of the "overal carrying-soil effect" of shallow buried rectangular pipe Jacking[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(10): 1936.
[2] 叶艺超, 彭立敏, 杨伟超, 等. 考虑泥浆触变性的顶管顶力计算方法[J]. 岩土工程学报, 2015, 37(9): 1653.YE Yichao, PENG Limin, YANG Weichao, et al. Calculation of jacking force for pipe-jacking considering mud slurry thixotropy[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(9): 1653.
[3] 王双, 夏才初, 葛金科. 考虑泥浆套不同形态的顶管管壁摩阻力计算公式[J]. 岩土力学, 2014(1): 159.WANG Shuang, XIA Caichu, GE Jinke. Formulae of lateral friction resistance for pipe-jacking considering different forms of mud screen[J]. Rock and Soil Mechanics, 2014(1): 159.
[4] 喻军, 李元海. 顶管泥浆套的物理性质对顶推力的影响[J]. 土木工程学报, 2015, 48(增刊2): 327.YU Jun, LI Yuanhai. Effect of physical properties of mud screen of pipe-jacking on jacking forces[J]. China Civil Engineering Journal, 2015,48(S2): 327.
[5] 李方楠, 沈水龙, 罗春泳. 考虑注浆压力的顶管施工引起土体变形计算方法[J]. 岩土力学, 2012, 33(1): 204.LI Fangnan, SHEN Shuilong, LUO Chunyong. Prediction approach of ground deformation induced by pipe jacking construction considering grouting pressure[J]. Rock and Soil Mechanics, 2012, 33(1): 204.
[6] 陈孝湘, 张培勇, 丁士君,等. 大口径三维曲线顶管顶力估算及实测分析[J]. 岩土力学, 2015, 36(增刊1): 547.CHEN Xiaoxiang, ZHANG Peiyong, DING Shijun, et al. Jacking force estimation and measured data analysis of 3D curved long distance and large diameter pipe jacking[J]. Rock and Soil Mechanics, 2015, 36(S1): 547.
[7] 周舒威, 夏才初, 葛金科,等. 黏土中超大直径顶管开挖面主动极限支护压力计算方法[J]. 岩土工程学报, 2013, 35(11): 2060.ZHOU Shuwei, XIA Caichu, GE Jinke, et al. An approach for calculating active limit support pressure of tunnel face of large-diameter pipe jacking in cohesive soils[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(11): 2060.
[8] 张治国, 张孟喜, 王卫东. 顶管推进引起施工场地竖向附加荷载分析[J]. 岩土力学, 2014, 35(增刊2): 121.ZHANG Zhiguo, ZHANG Mengxi, WANG Weidong. Analysis of soil vertical additional loads induced by pipe jacking construction[J]. Rock and Soil Mechanics, 2014, 35(S2): 121.
[9] 魏纲, 徐日庆, 屠玮. 顶管施工引起的土体扰动理论分析及试验研究[J]. 岩石力学与工程学报, 2004, 23(3): 476.WEI Gang, XU Riqing, TU Wei. Testing study and analysis of soil disturbance induced by pipe jacking construction[J]. Chinese Journal of Rock Mechanics and Engineering, 2004, 23(3): 476.
[10] 喻军, 龚晓南. 考虑顶管施工过程的地面沉降控制数值分析[J]. 岩石力学与工程学报, 2014(增刊1): 2605.YU Jun, GONG Xiaonan. Numerical analysis of surface settlement control considering pipe jacking construction process[J]. Chinese Journal of Rock Mechanics and Engineering, 2014(S1): 2605.
[11] 景路, 袁聚云, 袁勇. 顶管工程中的地层损失参数和土体变形计算[J]. 岩土力学, 2013, 34(增刊1): 173.JING Lu, YUAN Juyun, YUAN Yong. Ground loss parameter and soil deformation in pipe jacking[J]. Rock and Soil Mechanics, 2013, 34(S1): 173.
[12] 张建安. 矩形顶管顶推力对上部地表位移影响规律研究[J]. 城市道桥与防洪, 2017(8): 266.ZHANG Jian′an. Study of upper surface displacement affected by thrust of rectangular pipe jacking[J]. Urban Road Bridges and Flood Control, 2017(8): 266.
[13] 林强强. 矩形顶管引起地面变形的实测分析与控制研究[D]. 上海: 同济大学, 2008.LIN Qiangqiang. Research on measurement and control of ground deformation caused by rectangular pipe jacking[D]. Shanghai: Tongji University, 2008.
[14] 林越翔, 彭立敏, 吴桂航,等. 仿矩形顶管管壁摩阻力理论公式的探讨[J]. 现代隧道技术, 2017, 54(4): 180.LIN Yuexiang, PENG Limin, WU Guihang, et al. Discussion of a theoretical formula for the friction resistance of a pipe wall in quasi-rectangular pipe jacking[J]. Modern Tunnelling Technology, 2017, 54(4): 180.
[15] 韩冰, 阿力普江·杰如拉, 王述红, 等. 基于普氏卸荷拱理论的矩形顶管顶推力预估方法研究[J]. 建筑设计管理, 2017, 34(9): 84.HAN Bing, ALIPUJIANG Jierula, WANG Shuhong, et al. Research on estimation method of rectangular pipe jacking force based on Platts unloading arch theory[J]. Architectural Design Management, 2017, 34(9): 84.
[16] 给水排水工程顶管技术规: CECS 246—2008[S]. 北京: 中国计划出版社, 2008.Technical specification for pipe jacking of water supply and sewerage engineering: CECS 24-2008[S].Beijing: Chinese Planning Press, 2008.
[17] 洪开荣. 我国隧道及地下工程发展现状与展望[J]. 隧道建设, 2017, 37(2): 123.HONG Kairong. Development and prospects of tunnels and underground works in China in recent two years[J]. Tunnel Construction, 2017, 37(2): 123.
[18] 高毅, 冯超元, 程鹏. 浅埋矩形顶管的“整体背土效应”研究[J]. 岩土工程学报, 2018, 40(10): 1936.GAO Yi, FENG Chaoyuan, CHENG Peng. Study of the "overal carrying-soil effect" of shallow buried rectangular pipe Jacking[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(10): 1936.