多次分段注浆钢花管桩群结构抗滑性能模型试验研究
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摘要
为了更好地研究多次分段注浆钢花管桩群结构防治新技术及其作用机制,采用现场大比例模型试验,研究多次分段注浆钢花管桩群的抗滑性能,讨论钢花管注浆效果、群桩效应及破坏模式。试验结果表明:采用多次分段控制注浆钢花管桩群结构加固边坡,在桩周边均形成"树根状"水泥柱复合抗滑体,这种结构可以有效提高桩周土体抗剪强度,有效增强钢花管桩群结构的抗滑性能。三排6.0m桩长的多次分段注浆钢花管,比单排注浆钢花管水平抗滑力提高了1.1×10~4 N/根,群桩结构每根钢花管水平承载力相比单排钢花管提高约10.5%;三排桩群结构的钢花管均在滑面附近发生受弯破坏,建议在结构设计中加强滑面附近的桩体配筋设计,提高滑面附近的抗弯破坏能力,以达到更好的抗滑效果。
In order to better study the prevention and control mechanisms of multi-stage grouting steel pile group, large scale field model tests were carried out to analyze the anti-sliding performance of multiple segmented grouting steel pile group from the aspects of soil pressure and bending of steel pipe. Grouting effect,pile group effect and failure mode were also discussed. The test results show that,while a slope is reinforced by multiple segmented grouting steel pile group,"root shaped" anti-sliding cement columns around the grouting steel piles form,which can efficiently enhance the strength of the soil around the piles and improve the anti-sliding ability of the pile group. The horizontal anti-sliding force of every pile of multiple segmented grouting steel pile group structure with three rows of pipes of 6.0 in length was 1.1×10~4 N larger than that of single row piles,and the lateral bearing capacity of single pile increases by about 10.5% considering the group pile effect. Because of tat the bending failure of every pile of pile group happens near the sliding surface,it is suggested that the reinforcement ratio of the piles near the sliding surface should be properly enhanced to improve the anti-sliding ability.
In order to better study the prevention and control mechanisms of multi-stage grouting steel pile group, large scale field model tests were carried out to analyze the anti-sliding performance of multiple segmented grouting steel pile group from the aspects of soil pressure and bending of steel pipe. Grouting effect,pile group effect and failure mode were also discussed. The test results show that,while a slope is reinforced by multiple segmented grouting steel pile group,"root shaped" anti-sliding cement columns around the grouting steel piles form,which can efficiently enhance the strength of the soil around the piles and improve the anti-sliding ability of the pile group. The horizontal anti-sliding force of every pile of multiple segmented grouting steel pile group structure with three rows of pipes of 6.0 in length was 1.1×10~4 N larger than that of single row piles,and the lateral bearing capacity of single pile increases by about 10.5% considering the group pile effect. Because of tat the bending failure of every pile of pile group happens near the sliding surface,it is suggested that the reinforcement ratio of the piles near the sliding surface should be properly enhanced to improve the anti-sliding ability.
引文
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[14]陈强,陈炜韬,刘世东,等.注浆钢管微型桩加固滑坡的试验研究[J].西南交通大学学报,2011,46(5):758-763.(CHEN Qiang,CHEN Weitao,LIU Shidong,et al.Model test on application of grouting steel-tube micro piles to landslide reinforcement[J].Journal of Southwest Jiaotong University,2011,46(5):758-763.(in Chinese))
[15]闫金凯,殷跃平,门玉明.微型桩单桩加固滑坡体的模型试验研究[J].工程地质学报,2009,17(5):669-674.(YAN Jinkai,YINYueping,MEN Yuming.Model test study on landslide reinforcement with single micro pile[J].Journal of Engineering Geology,2009,17(5):669-674.(in Chinese))
[16]谭文勇.钢花管分段注浆工艺试验与检测[J].施工技术,2016,45(6):122-128.(TAN Wenyong.Tests and detection of multi-section grouting technique of steel grouting pipes[J].Construction Technology,2016,45(6):122-128.(in Chinese))
[17]王华俊,徐洪科,董理金.钢花管注浆加固在高速公路边坡挡墙病害防治中的应用研究[J].地质灾害与环境保护,2016,27(3):92-95.(WANG Huajun,XU Hongke,DONG Lijin.Application of grouted steel floral tube in preventing diseases of slop retaining wall in highway[J].Journal of Geological Hazards and Environment Preservation,2016,27(3):92-95.(in Chinese))
[18]成尚锋,张海燕.钢花管注浆技术在填方路基病害处治中的应用[J].中外公路,2007,(4):36-39.(CHENG Shangfeng,ZHANG Haiyan.Application of pipe grouting technology in treatment of filling subgrade diseases[J].Journal of China and Foreign Highway,2007,(4):36-39.(in Chinese))
[19]罗文辉.多次分段注浆钢花管技术研究--以潮惠高速公路边坡灾害防治为例[J].中国高新科技,2018,(16):33-35.(LUO Wenhui.Research on multi-stage grouting pipe technology:taking slope disaster prevention of Chaohui expressway as an example[J].China High-tech,2018,(16):33-35.(in Chinese))
[20]张玉芳.道路边坡灾害整治新技术及应用[C]//2018世界交通运输大会论文集.[S.l.]:[s.n.],2018:12.(ZHANG Yufang.New technology and application of road slope disaster treatment[C]//Proceedings of the 2018 World Transport Congress.[S.l.]:[s.n.],2018:12.(in Chinese))
[21]潘锋.注浆钢花管微型桩在路基滑坡治理中的应用[J].工程与建设,2017,31(4):527-529.(PAN Feng.Application of grouting micro-pile in treatment of subgrade landslide[J].Engineering and Construction,2017,31(4):527-529.(in Chinese))
[22]赵晓霞,张成良,王春.钢花管压力注浆型抗滑挡墙在振清公路K64+600桥滑坡治理中的应用[J].世界科技研究与发展,2014,36(3):226-230.(ZHAO Xiaoxia,ZHANG Chengliang,WANG Chun.Application of steel-tube bored grouting anti-sliding retaining wall to treatment of Zhenqing 5-K64+100 bridge slope[J].World Sci-tech R&D,2014,36(3):226-230.(in Chinese))
[2]RICHARD J F,CATALINA O P,MICHELE C.Compaction-grouted micropiles at the Northwestern University NGES[C]//National Geotechnical Experimental Sites.New York:Geotechnical Special Publication,ASCE,2000:235-249.
[3]龚健,陈仁朋,陈云敏,等.微型桩原型水平荷载试验研究[J].岩石力学与工程学报,2004,23(20):3 541-3 546.(GONG Jian,CHENRenpeng,CHEN Yunmin,et al.Prototype testing study on micro piles under lateral loading[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(20):3 541-3 546.(in Chinese))
[4]刘鸿,肖世国,张益锋.微型桩组合结构抗滑机制模型试验研究[J].中国铁道科学,2014,(1):18-24.(LIU Hong,XIAOShiguo,ZHANG Yifeng.Experimental study on the anti-sliding mechanism of micro-pile composite structure[J].China Railway Science,2014,(1):18-24.(in Chinese))
[5]孙书伟,陈冲,丁辉,等.微型桩群加固土坡稳定性分析[J].岩土工程学报,2014,36(12):2 306-2 314.(SUN Shuwei,CHENChong,DING Hui,et al.Stability analysis of earth slopes reinforced with micro piles[J].Chinese Journal of Geotechnical Engineering,2014,36(12):2 306-2 314.(in Chinese))
[6]闫金凯,殷跃平,门玉明,等.滑坡微型桩群桩加固工程模型试验研究[J].土木工程学报,2011,44(4):120-128.(YAN Jinkai,YINYueping,MEN Yuming,et al.Model test study of landslide reinforcement with micro pile groups[J].China Civil Engineering Journal,2011,44(4):120-128.(in Chinese))
[7]闫金凯,门玉明.基于模型试验的滑坡防治微型桩设计方法[J].工程地质学报,2012,20(3):355-361.(YAN Jinkai,MEN Yuming.Model tests based design method of micro piles for landslide reinforcement[J].Journal of Engineering Geology,2012,20(3):355-361.(in Chinese))
[8]孙祺华.钢花管微型桩在路基边坡加固防护中的应用[J].公路交通技术,2013,(5):17-20.(SUN Qihua.Application of steel floral tube micro piles in reinforcement and protection of roadbed slopes[J].Technology of Highway and Transport,2013,(5):17-20.(in Chinese))
[9]张昕,蒋炳元.注浆钢花管在土体加固工程中的应用[J].湖南交通科技,2006,(1):43-46.(ZHANG Xin,JIANG Bingyuan.Application of grouting pipe in soil reinforcement engineering[J].Hunan Communication Science and Technology,2006,(1):43-46.(in Chinese))
[10]何永华,李治国.钢花管劈裂注浆施工技术[J].施工技术,2008,(增1):254-256.(HE Yonghua,LI Zhiguo.Construction technology of split grouting for steel flower pipe[J].Construction Technology,2008,(Supp.1):254-256.(in Chinese))
[11]朱宝龙,胡厚田,张玉芳,等.钢管压力注浆型抗滑挡墙在京珠高速公路K108滑坡治理中的应用[J].岩石力学与工程学报,2006,25(2):399-406.(ZHU Baolong,HU Houtian,ZHANG Yufang,et al.Application of steel-tube bored grouting anti-sliding retaining wall to treatment of landslide K108 in Beijing-Zhuhai Expressway[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(2):399-406.(in Chinese))
[12]朱宝龙,杨明,胡厚田,等.类土质边坡锚固特性的试验研究[J].岩土力学,2004,25(12):1 923-1 927.(ZHU Baolong,YANG Ming,HU Houtian,et al.Experimental research on behaviors of anchor in similar soil slope[J].Rock and Soil Mechanics,2004,25(12):1 923-1 927.(in Chinese))
[13]向润泽,宋刚.钢花管和注浆钢锚管在公路滑坡加固中的应用[J].土工基础,2008,22(6):14-17.(XIANG Runze,SONG Gang.Application of steel perforated pipe and injecting grout steel bolt pipe in reinforcement on a sloping sliding located at Shang Pu expressway[J].Soil Engineering and Foundation,2008,22(6):14-17.(in Chinese))
[14]陈强,陈炜韬,刘世东,等.注浆钢管微型桩加固滑坡的试验研究[J].西南交通大学学报,2011,46(5):758-763.(CHEN Qiang,CHEN Weitao,LIU Shidong,et al.Model test on application of grouting steel-tube micro piles to landslide reinforcement[J].Journal of Southwest Jiaotong University,2011,46(5):758-763.(in Chinese))
[15]闫金凯,殷跃平,门玉明.微型桩单桩加固滑坡体的模型试验研究[J].工程地质学报,2009,17(5):669-674.(YAN Jinkai,YINYueping,MEN Yuming.Model test study on landslide reinforcement with single micro pile[J].Journal of Engineering Geology,2009,17(5):669-674.(in Chinese))
[16]谭文勇.钢花管分段注浆工艺试验与检测[J].施工技术,2016,45(6):122-128.(TAN Wenyong.Tests and detection of multi-section grouting technique of steel grouting pipes[J].Construction Technology,2016,45(6):122-128.(in Chinese))
[17]王华俊,徐洪科,董理金.钢花管注浆加固在高速公路边坡挡墙病害防治中的应用研究[J].地质灾害与环境保护,2016,27(3):92-95.(WANG Huajun,XU Hongke,DONG Lijin.Application of grouted steel floral tube in preventing diseases of slop retaining wall in highway[J].Journal of Geological Hazards and Environment Preservation,2016,27(3):92-95.(in Chinese))
[18]成尚锋,张海燕.钢花管注浆技术在填方路基病害处治中的应用[J].中外公路,2007,(4):36-39.(CHENG Shangfeng,ZHANG Haiyan.Application of pipe grouting technology in treatment of filling subgrade diseases[J].Journal of China and Foreign Highway,2007,(4):36-39.(in Chinese))
[19]罗文辉.多次分段注浆钢花管技术研究--以潮惠高速公路边坡灾害防治为例[J].中国高新科技,2018,(16):33-35.(LUO Wenhui.Research on multi-stage grouting pipe technology:taking slope disaster prevention of Chaohui expressway as an example[J].China High-tech,2018,(16):33-35.(in Chinese))
[20]张玉芳.道路边坡灾害整治新技术及应用[C]//2018世界交通运输大会论文集.[S.l.]:[s.n.],2018:12.(ZHANG Yufang.New technology and application of road slope disaster treatment[C]//Proceedings of the 2018 World Transport Congress.[S.l.]:[s.n.],2018:12.(in Chinese))
[21]潘锋.注浆钢花管微型桩在路基滑坡治理中的应用[J].工程与建设,2017,31(4):527-529.(PAN Feng.Application of grouting micro-pile in treatment of subgrade landslide[J].Engineering and Construction,2017,31(4):527-529.(in Chinese))
[22]赵晓霞,张成良,王春.钢花管压力注浆型抗滑挡墙在振清公路K64+600桥滑坡治理中的应用[J].世界科技研究与发展,2014,36(3):226-230.(ZHAO Xiaoxia,ZHANG Chengliang,WANG Chun.Application of steel-tube bored grouting anti-sliding retaining wall to treatment of Zhenqing 5-K64+100 bridge slope[J].World Sci-tech R&D,2014,36(3):226-230.(in Chinese))