旋喷自带钢绞线锚杆现场试验研究
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摘要
高压旋喷是一种较成熟的地基处理技术,将高压旋喷技术与地质钻机有机地结合起来可形成一种自带钢绞线的新型锚杆。结合工程实际介绍了三根该新型足尺锚杆抗拔破坏试验的情况,并与二根足尺传统锚杆的试验结果进行了对比,旋喷自带钢绞线锚杆利用高压旋喷技术在软弱土层中可形成抗拔力较大的锚固体,利用特殊工艺在旋喷加固土体的同时可将钢绞线直接带入预设土层中,克服了传统锚杆不能在软弱土层中施工的局限性,而且根据需要还可在设定的土层中形成扩大头(即变截面),这样可大大增加锚杆的抗拔力,试验成果对研究高压旋喷自带钢绞线锚杆的受力机理提供了较完整的资料,对该锚杆在工程上的推广应用具有现实的指导意义。
Jet-grouting is a mature technique for foundation treatment.Combination of the jet-grouting with geological drilling rig will make a new type of self-boring anchors.Tests on the uplift destruction of three full-scale anchors are introduced,and the test results are compared with those of two traditional full-scale anchors.The jet-grouting self-boring anchors use the jet-grouting to form a better anchor-body in the soft soil by taking strand to the default soil with jet grouting,which overcomes the traditional deficiency that the anchor bolts can not be used in the soft soil.Another advantage is that the jet-grouting self-boring anchors can make an expansion of the end(variable cross-section),which can significantly raise pull-out force.The study results will provide more complete experimental data of high pressure jet-grouting self-boring anchors.And it is of great significance to use the present anchors in projects.
Jet-grouting is a mature technique for foundation treatment.Combination of the jet-grouting with geological drilling rig will make a new type of self-boring anchors.Tests on the uplift destruction of three full-scale anchors are introduced,and the test results are compared with those of two traditional full-scale anchors.The jet-grouting self-boring anchors use the jet-grouting to form a better anchor-body in the soft soil by taking strand to the default soil with jet grouting,which overcomes the traditional deficiency that the anchor bolts can not be used in the soft soil.Another advantage is that the jet-grouting self-boring anchors can make an expansion of the end(variable cross-section),which can significantly raise pull-out force.The study results will provide more complete experimental data of high pressure jet-grouting self-boring anchors.And it is of great significance to use the present anchors in projects.
引文
[1]程良奎,杨志银,等.岩土加固实用技术[M].北京:地震出版社,1994.(CHENG Liang-kui,YANG Zhi-yin,et al.The practical technology of the rock and soil reinforcement[M].Beijing:SeismiLogical Press,1994.(in Chinese))
[2]崔江余.基坑锚杆支护破裂面模式分析[J].岩石力学与工程学报,2003,22(2):337–340.(CUI Jiang-yu,Mode analysis of sliding plane for foundation pit anchor[J].Chinese Journal of Rock Mechanics and Engineering,2003,22(2):337–340.(in Chinese))
[3]崔江余,贺长俊.自带旋喷钻头的成束钢绞线锚杆:中国,ZL200320100593.6[P].2003.(CUI Jiang-yu,HE Chang-jun,Fascicular strand anchor with Jet-grouting drill:China,ZL200320100593.6[P],2003.(in Chinese))
[4]CECS22:90土层锚杆设计与施工规范[S].北京:中国计划出版社.(CECS22:90 Anchor rod design and construction of norms[S].Beijing:China Planning Press.(in Chinese))
[5]GB50086—2001锚杆喷射混凝土支护技术规范[S].北京:中国计划出版社.(GB50086—2001 Anchor shotcrete support technical specifications[S].China Planning Press.(in Chinese))
[6]冶金工业工程质量监督总站检测中心.锚杆极限抗拔力[R].2003.(DJ)字(2003)第P036号,北京.(Supervision and Testing Center Station.The limit anti-stubbs of the anchor[R].2003.(DJ)(2003)NO.P036,Beijing.(in Chinese))
[7]北京市建设工程质量检测中心第三检测所.锚杆抗拔力试验报告[R].2004.京建质检J3-G字2004第(MG001)号,北京.(The Third Detection Institute of Beijing Construction Engineering Quality Inspection Center.The test report of anti-stubbs of the anchor[R].2004.NO.J3-G,2004(MG001),Beijing.(in Chinese))
[2]崔江余.基坑锚杆支护破裂面模式分析[J].岩石力学与工程学报,2003,22(2):337–340.(CUI Jiang-yu,Mode analysis of sliding plane for foundation pit anchor[J].Chinese Journal of Rock Mechanics and Engineering,2003,22(2):337–340.(in Chinese))
[3]崔江余,贺长俊.自带旋喷钻头的成束钢绞线锚杆:中国,ZL200320100593.6[P].2003.(CUI Jiang-yu,HE Chang-jun,Fascicular strand anchor with Jet-grouting drill:China,ZL200320100593.6[P],2003.(in Chinese))
[4]CECS22:90土层锚杆设计与施工规范[S].北京:中国计划出版社.(CECS22:90 Anchor rod design and construction of norms[S].Beijing:China Planning Press.(in Chinese))
[5]GB50086—2001锚杆喷射混凝土支护技术规范[S].北京:中国计划出版社.(GB50086—2001 Anchor shotcrete support technical specifications[S].China Planning Press.(in Chinese))
[6]冶金工业工程质量监督总站检测中心.锚杆极限抗拔力[R].2003.(DJ)字(2003)第P036号,北京.(Supervision and Testing Center Station.The limit anti-stubbs of the anchor[R].2003.(DJ)(2003)NO.P036,Beijing.(in Chinese))
[7]北京市建设工程质量检测中心第三检测所.锚杆抗拔力试验报告[R].2004.京建质检J3-G字2004第(MG001)号,北京.(The Third Detection Institute of Beijing Construction Engineering Quality Inspection Center.The test report of anti-stubbs of the anchor[R].2004.NO.J3-G,2004(MG001),Beijing.(in Chinese))
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