强夯地振动统计分析与评价
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摘要
强夯法加固地基由于其施工简单,工程造价低,在世界范围内受到广泛应用.近年来强夯引发的地振动对邻近的建(构)筑物的影响受到业内的日益关注.基于高速公路强夯加固地基施工现场采集的207条振动记录,对强夯振动的峰值加速度与峰值速度随振源距的变化进行了统计分析.参照中国地震烈度表(GB/T 17742-1999)的烈度分级和《安全爆破规程》(GB6722-2003)的允许振速,对强夯的地震动效应作出评价,并建议在该强夯能级下不同结构类型的允许安全距离.
Being of the simple constructing procedure and low cost,dynamic compaction method was widely used in the foundation consolidation around the world.Recently,the vibration effect due to the dynamic compaction on the adjacent structures was highlighted in the construction field.Based on 207 vibration records recorded in-situ during the construction of foundation consolidation by the way of dynamic compaction,the statistical analysis respecting to the peak ground acceleration(PGA) and peak ground velocity(PGV) was performed.Referring to the earthquake intensity classification of the "China Earthquake Intensity Table"(GB/T 17742-1999) and the allowable vibration velcity of the "Safe Blasting Regulation"(GB6722-2003),the vibration assessment for the dynamic compaction was carried out.The allowable safety distance for the different structures with the dynamic compaction under the specified energy grade was proposed as well.
Being of the simple constructing procedure and low cost,dynamic compaction method was widely used in the foundation consolidation around the world.Recently,the vibration effect due to the dynamic compaction on the adjacent structures was highlighted in the construction field.Based on 207 vibration records recorded in-situ during the construction of foundation consolidation by the way of dynamic compaction,the statistical analysis respecting to the peak ground acceleration(PGA) and peak ground velocity(PGV) was performed.Referring to the earthquake intensity classification of the "China Earthquake Intensity Table"(GB/T 17742-1999) and the allowable vibration velcity of the "Safe Blasting Regulation"(GB6722-2003),the vibration assessment for the dynamic compaction was carried out.The allowable safety distance for the different structures with the dynamic compaction under the specified energy grade was proposed as well.
引文
[1]方磊,经绯,刘松玉.强夯振动影响与构筑物安全距离研究[J].东南大学学报:自然科学版,2001,31(3):29-32.FANG Lei,JING Fei,LIU Songyu.Influence of VibrationCaused by Dynamic Compaction and Safe Distances forBuildings[J].Journal of Southeast University:Natural Sci-ence Edition,2001,31(3):29-32.(in Chinese)
[2]雷学文,白世伟,孟庆山.强夯引起的振动规律及对建筑物的影响分析[J].建筑技术开发,2002,29(12):20-21.LEI Xuewen,BAI Shiwei,MENG Qingshan.Analysis onthe Vibration Produced by Heavy Tamping and Its Influ-ence on Building[J].Building Technique Development,2002,29(12):20-21.(in Chinese)
[3]李廷.强夯振动效应研究[J].山西建筑,2003,29(13):13-14.LI Ting.Study of Vibration of Dynamic Compaction[J].Shanxi Architecture,2003,29(13):13-14.(in Chinese)
[4]欧阳立胜,王迪洁.强夯地震效应浅析[J].华南地震,2004,24(3):96-100.OUYANG Lisheng,WANG Dijie.Simple Analysis for theSeismic Effect of Dynamic Compaction[J].South ChinaJournal of Seismology,2004,24(3):96-100.(in Chi-nese)
[5]邹立华,赵建昌,陈全红.湿陷性黄土强夯加固振动试验研究[J].岩石力学与工程学报,2005,24(18):3393-3397.ZOU Lihua,ZHAO Jianchang,CHEN Quanhong.Experi-ment Study on Vibration to Improve Collapsible Loess WithDynamic Compaction[J].Chinese Journal of Rock Me-chanics and Engineering,2005,24(18):3393-3397.(inChinese)
[6]张孟喜,王玉玲,冯建龙.黄土受强夯扰动的工程特性与环境公害研究[J].岩土力学,2004,25(12):1903-1909.ZHANG Mengxi,WANG Yuling,FENG Jianlong.Engi-neering Properties of Loess Disturbed and Geo-Environ-mental Damage Due to Dynamic Consolidation[J].Rockand Soil Mechanics,2004,25(12):1903-1909.(in Chi-nese)
[7]耿光旭,李华平,刘金川.施工振动对环境影响的检测[J].勘察科学技术,2004(4):54-57.GENG Guangxu,LI Huaping,LIU Jinchuan.Monitoringof Construction Vibration to Environment[J].Science andTechnology of Reconnaissance,2004(4):54-57.(in Chi-nese)
[8]史慧杰.强夯施工振动监测与夯后地基处理效果振动测试研究[D].青岛:中国海洋大学,2005.SHI Huijie.Vibration Monitoring of Dynamic Compactionand Vibration Testing of Consolidation Effect of GroundBed by Dynamic Compaction[D].Qingdao:China OceanUniversity,2005.(in Chinese)
[9]中国工程爆破协会.爆破安全规程(GB6722-2003)[S].北京:中国标准出版社,2003.China Society of Engineering Blasting.Blasting SafetySpecfication(GB6722-2003)[S].Beijing:China Stan-dard Press,2003.(in Chinese)
[10]中国质量技术监督局.中国地震烈度表(GB/T 17742-1999)[S].北京:中国标准出版社,1999.China Quality Supervision Bureau.China Earthquake In-tensity Table(GB/T 17742-1999)[S].Beijing:ChinaStandard Press,1999.(in Chinese)
[2]雷学文,白世伟,孟庆山.强夯引起的振动规律及对建筑物的影响分析[J].建筑技术开发,2002,29(12):20-21.LEI Xuewen,BAI Shiwei,MENG Qingshan.Analysis onthe Vibration Produced by Heavy Tamping and Its Influ-ence on Building[J].Building Technique Development,2002,29(12):20-21.(in Chinese)
[3]李廷.强夯振动效应研究[J].山西建筑,2003,29(13):13-14.LI Ting.Study of Vibration of Dynamic Compaction[J].Shanxi Architecture,2003,29(13):13-14.(in Chinese)
[4]欧阳立胜,王迪洁.强夯地震效应浅析[J].华南地震,2004,24(3):96-100.OUYANG Lisheng,WANG Dijie.Simple Analysis for theSeismic Effect of Dynamic Compaction[J].South ChinaJournal of Seismology,2004,24(3):96-100.(in Chi-nese)
[5]邹立华,赵建昌,陈全红.湿陷性黄土强夯加固振动试验研究[J].岩石力学与工程学报,2005,24(18):3393-3397.ZOU Lihua,ZHAO Jianchang,CHEN Quanhong.Experi-ment Study on Vibration to Improve Collapsible Loess WithDynamic Compaction[J].Chinese Journal of Rock Me-chanics and Engineering,2005,24(18):3393-3397.(inChinese)
[6]张孟喜,王玉玲,冯建龙.黄土受强夯扰动的工程特性与环境公害研究[J].岩土力学,2004,25(12):1903-1909.ZHANG Mengxi,WANG Yuling,FENG Jianlong.Engi-neering Properties of Loess Disturbed and Geo-Environ-mental Damage Due to Dynamic Consolidation[J].Rockand Soil Mechanics,2004,25(12):1903-1909.(in Chi-nese)
[7]耿光旭,李华平,刘金川.施工振动对环境影响的检测[J].勘察科学技术,2004(4):54-57.GENG Guangxu,LI Huaping,LIU Jinchuan.Monitoringof Construction Vibration to Environment[J].Science andTechnology of Reconnaissance,2004(4):54-57.(in Chi-nese)
[8]史慧杰.强夯施工振动监测与夯后地基处理效果振动测试研究[D].青岛:中国海洋大学,2005.SHI Huijie.Vibration Monitoring of Dynamic Compactionand Vibration Testing of Consolidation Effect of GroundBed by Dynamic Compaction[D].Qingdao:China OceanUniversity,2005.(in Chinese)
[9]中国工程爆破协会.爆破安全规程(GB6722-2003)[S].北京:中国标准出版社,2003.China Society of Engineering Blasting.Blasting SafetySpecfication(GB6722-2003)[S].Beijing:China Stan-dard Press,2003.(in Chinese)
[10]中国质量技术监督局.中国地震烈度表(GB/T 17742-1999)[S].北京:中国标准出版社,1999.China Quality Supervision Bureau.China Earthquake In-tensity Table(GB/T 17742-1999)[S].Beijing:ChinaStandard Press,1999.(in Chinese)
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