顶管超挖量影响因素的分析及相关问题的解决
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摘要
分析了顶管施工中,超挖量与纠偏角度、管线曲率半径、注浆润滑状况以及地质条件和地面沉降量的关系,分析结果表明:超挖量大小决定了最大纠偏角度;超挖量的大小与曲线顶管的管线曲率半径成反比;注浆润滑的好坏需要综合考虑超挖量与注浆量、润滑效果和土粒直径的关系;地面沉降量与超挖量成反比,且受到岩土类型的影响。总结了施工经验,提出了超挖量确定的基本原则,影响超挖量的主要因素;提出了调节、减小超挖量的有效办法;提出了全岩石顶管由于超挖导致"抱死"问题的解决办法。
In the pipe jacking construction,the relationship between over-excavation amount and correcting angle,pipe curvature radius,grouting lubrication,geological conditions and surface subsidence are analyzed.The results show that the maximum angle of correction is determined by the amount of over excavation,and the size of the over excavation is inversely proportional to the curvature radius of the pipe jacking curve.The relationship between the amount of over excavation and grouting,the effect of lubrication and the diameter of soil particles should be considered comprehensively.The land subsidence is inversely proportional to the over excavation amount,and it is affected by the geotechnical types.The construction experience is summarized,and the basic principles for determining the over excavation amount are put forward.And the main factors affecting the over excavation amount are put forward.The effective method of adjusting and reducing over-excavation amount is put forward,and a solution to the problem of " locking" caused by over excavation is put forward in full-section rock pipe jacking construction.
In the pipe jacking construction,the relationship between over-excavation amount and correcting angle,pipe curvature radius,grouting lubrication,geological conditions and surface subsidence are analyzed.The results show that the maximum angle of correction is determined by the amount of over excavation,and the size of the over excavation is inversely proportional to the curvature radius of the pipe jacking curve.The relationship between the amount of over excavation and grouting,the effect of lubrication and the diameter of soil particles should be considered comprehensively.The land subsidence is inversely proportional to the over excavation amount,and it is affected by the geotechnical types.The construction experience is summarized,and the basic principles for determining the over excavation amount are put forward.And the main factors affecting the over excavation amount are put forward.The effective method of adjusting and reducing over-excavation amount is put forward,and a solution to the problem of " locking" caused by over excavation is put forward in full-section rock pipe jacking construction.
引文
[1]马保松.非开挖工程学[M].北京:北京人民交通出版社,2008.
[2]Li,Chao,Zhong,Zuliang,Bie,Congying,et al.Field performance of large section concrete pipes cracking during jacking in Chongqing-A case study[J].Tunnelling and Underground Space Technology,2018,82:568-583.
[3]郝润霞.软土地区曲线段盾构隧道超挖量与注浆分析[J].地下空间与工程学报,2013,9(5):1132-1134.
[4]詹红梅.顶管施工引起地面沉降分析和计算[J].地下空间与工程学报,2008(3):583-585.
[5]郑跃,丁文其,陈立生.受顶管施工影响的土体扰动分析与实测研究[J].地下空间与工程学报,2010,6(5):1015-1020.
[6]张文瀚,谢雄耀,李攀.浅层顶管隧道施工对路基变形影响数值分析[J].地下空间与工程学报,2011,7(S2):1619-1624,1652.
[7]关战伟,孙阳.地下顶管施工对沉井后背土体的扰动监测分析[J].地下空间与工程学报,2013,9(S1):1630-1633,1638.
[8]吕庆洲.顶管机液压纠偏角度及其应用分析[J].非开挖技术,2016,37(2):73-76.
[9]葛春晖.顶管工程设计与施工[M].北京:中国建筑工业出版社,2012.
[10]李慧鑫.大直径泥水盾构隧道超挖量引起地面沉降研究[D].南京:南京大学,2014.
[11]陈剑,李智明.急曲线隧道盾构超挖量及铰接角的理论计算[J].中国公路学报,2017,30(8):66-73.
[12]魏纲.盾构施工中土体损失引起的地面沉降预测[J].岩土力学,2007,28(11):2375-2379.
[13]魏纲,俆日庆,邵剑明,等.顶管施工中注浆减摩作用机理的研究[J].岩土力学,2004,25(6):930-934.
[14]丛茂强,陈锦剑,王建华.基于注浆压力控制的混凝土顶管施工微扰动机理[J].上海交通大学学报,2013,47(6):867-871.
[15]潘建立.顶管施工引起土体变形的计算方法及应用[J].吉林大学学报(地球科学版),2016,46(5):1458-1465.
[16]唐素文,吕庆洲,辛翰文.一种基于挤扩环的顶管机[P].中国专利号:ZL201720878785.1.
[17]吕庆洲,卜祥鑫,唐素文.一种岩石顶管掘进机的外供高压水循环结构[P].中国专利号:ZL20180253036.9.
[2]Li,Chao,Zhong,Zuliang,Bie,Congying,et al.Field performance of large section concrete pipes cracking during jacking in Chongqing-A case study[J].Tunnelling and Underground Space Technology,2018,82:568-583.
[3]郝润霞.软土地区曲线段盾构隧道超挖量与注浆分析[J].地下空间与工程学报,2013,9(5):1132-1134.
[4]詹红梅.顶管施工引起地面沉降分析和计算[J].地下空间与工程学报,2008(3):583-585.
[5]郑跃,丁文其,陈立生.受顶管施工影响的土体扰动分析与实测研究[J].地下空间与工程学报,2010,6(5):1015-1020.
[6]张文瀚,谢雄耀,李攀.浅层顶管隧道施工对路基变形影响数值分析[J].地下空间与工程学报,2011,7(S2):1619-1624,1652.
[7]关战伟,孙阳.地下顶管施工对沉井后背土体的扰动监测分析[J].地下空间与工程学报,2013,9(S1):1630-1633,1638.
[8]吕庆洲.顶管机液压纠偏角度及其应用分析[J].非开挖技术,2016,37(2):73-76.
[9]葛春晖.顶管工程设计与施工[M].北京:中国建筑工业出版社,2012.
[10]李慧鑫.大直径泥水盾构隧道超挖量引起地面沉降研究[D].南京:南京大学,2014.
[11]陈剑,李智明.急曲线隧道盾构超挖量及铰接角的理论计算[J].中国公路学报,2017,30(8):66-73.
[12]魏纲.盾构施工中土体损失引起的地面沉降预测[J].岩土力学,2007,28(11):2375-2379.
[13]魏纲,俆日庆,邵剑明,等.顶管施工中注浆减摩作用机理的研究[J].岩土力学,2004,25(6):930-934.
[14]丛茂强,陈锦剑,王建华.基于注浆压力控制的混凝土顶管施工微扰动机理[J].上海交通大学学报,2013,47(6):867-871.
[15]潘建立.顶管施工引起土体变形的计算方法及应用[J].吉林大学学报(地球科学版),2016,46(5):1458-1465.
[16]唐素文,吕庆洲,辛翰文.一种基于挤扩环的顶管机[P].中国专利号:ZL201720878785.1.
[17]吕庆洲,卜祥鑫,唐素文.一种岩石顶管掘进机的外供高压水循环结构[P].中国专利号:ZL20180253036.9.