钢纤维混凝土在特厚冲积层冻结井壁中的工程应用
|
摘要
针对深厚冲积层冻结井壁承受高水压、高地应力等外荷载作用的问题,采用钢钎维、硅粉、矿渣和高效减水剂配制出CF75高强高性能钢钎维混凝土作为筑壁材料,并研究了钢纤维混凝土的力学性能。通过对钢纤维混凝土的工程应用情况进行现场监测,结果表明,冻结井壁环向和竖向最大应变分别达到1 170和164,在混凝土极限应变范围以内,符合安全要求。
For the problem that freezing shaft wall in deep and thick alluvium bears high water pressure,high geo-stress and other external load,we use steel fiber,silicon powder,mineral waste reside,high efficiency concrete to produce CF75 high strength high performance steel fiber concrete for constructing shaft lining,and study its mechanical property,monitor the engineering application of steel fiber concrete.The results show that the circumferential and vertical maximum strain of freezing wall reaches 1170 and 164 respectively,which is within the ultimate strain of concrete and meets the safety requirements.
For the problem that freezing shaft wall in deep and thick alluvium bears high water pressure,high geo-stress and other external load,we use steel fiber,silicon powder,mineral waste reside,high efficiency concrete to produce CF75 high strength high performance steel fiber concrete for constructing shaft lining,and study its mechanical property,monitor the engineering application of steel fiber concrete.The results show that the circumferential and vertical maximum strain of freezing wall reaches 1170 and 164 respectively,which is within the ultimate strain of concrete and meets the safety requirements.
引文
[1]薛维培,宋海清,陈志勇,等.冻结井壁高强高性能混凝土配置及应用[J].建井技术,2014,35(2):45-48.
[2]王谦,朱锋,鲁统卫.高强高性能钢纤维混凝土在龙固煤矿冻井井筒筑壁施工中的应用研究[J].建井技术,2014,35(5):42-45.
[3]王其胜.钢纤维混凝土增强作用及在软岩巷道支护的应用[J].辽宁工程技术大学学报,2009,28(3):337-340.
[4]宋海清,程桦,姚直书.深部冻结井壁大体积高强高性能混凝土的试验研究[J].西部探矿工程,2006(2):154-156.
[5]陈秀云,费建刚,孟会英.钢纤维混凝土配合比设计试验研究[J].混凝土,2009,35(7):111-116.
[6]姚直书,高扬,宋海清.冻结井壁防裂抗渗高性能混凝土试验研究[J].硅酸盐通报,2014,33(4):918-922.
[7]姚直书,程桦,江开尧.深厚冲积层冻结法凿井外壁受力变形监测分析[J].煤炭工程,2015,47(10):38-41.
[8]宋雷,杨维好,李海鹏.郭屯煤矿主井冻结法凿井信息化监测技术[J].采矿与安全工程学报,2010,27(1):19-23.
[2]王谦,朱锋,鲁统卫.高强高性能钢纤维混凝土在龙固煤矿冻井井筒筑壁施工中的应用研究[J].建井技术,2014,35(5):42-45.
[3]王其胜.钢纤维混凝土增强作用及在软岩巷道支护的应用[J].辽宁工程技术大学学报,2009,28(3):337-340.
[4]宋海清,程桦,姚直书.深部冻结井壁大体积高强高性能混凝土的试验研究[J].西部探矿工程,2006(2):154-156.
[5]陈秀云,费建刚,孟会英.钢纤维混凝土配合比设计试验研究[J].混凝土,2009,35(7):111-116.
[6]姚直书,高扬,宋海清.冻结井壁防裂抗渗高性能混凝土试验研究[J].硅酸盐通报,2014,33(4):918-922.
[7]姚直书,程桦,江开尧.深厚冲积层冻结法凿井外壁受力变形监测分析[J].煤炭工程,2015,47(10):38-41.
[8]宋雷,杨维好,李海鹏.郭屯煤矿主井冻结法凿井信息化监测技术[J].采矿与安全工程学报,2010,27(1):19-23.