近区爆破对土石坝安全影响分析
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摘要
邻近坝区爆破开挖诱发的爆破振动对土石坝安全有不利影响,确定可靠的影响分析方法、拟定合理的爆破控制措施对保证土石坝安全具有重要作用。结合工程实例,通过建立有限元模型、施加爆破振动荷载,从坝体应力和坝坡稳定等方面分析确定合理的爆破安全质点振动速度限值;根据爆破试验监测数据和有关规程规范,提出爆破分区控制措施以及爆破施工过程中需根据监测成果同步调整爆破安全控制标准、及时修正爆破施工参数的方法。提出的分析方法和控制措施可为近区爆破对土石坝安全影响和拟定爆破分区控制措施提供参考。
The vibration induced by the blasting near dam site can cause some adverse effects on earth-rock dam,so determining the reliable analysis method and reasonable control measures is important to ensure the safety of earth-rock dam.Combining with practical projects,the reasonable particle vibration velocity is determined through the analysis of stress and slope stability by establishing finite element model.The partition control measures of blasting are presented according to the monitoring data of blasting tests and relative specifications.Then the safety control standards and construction parameters should be adjusted according to the monitoring data in construction process.The analysis method and control measures proposed here may be a reference for the safety analysis of blasting on earth-rock dams and determining the partition control measures.
The vibration induced by the blasting near dam site can cause some adverse effects on earth-rock dam,so determining the reliable analysis method and reasonable control measures is important to ensure the safety of earth-rock dam.Combining with practical projects,the reasonable particle vibration velocity is determined through the analysis of stress and slope stability by establishing finite element model.The partition control measures of blasting are presented according to the monitoring data of blasting tests and relative specifications.Then the safety control standards and construction parameters should be adjusted according to the monitoring data in construction process.The analysis method and control measures proposed here may be a reference for the safety analysis of blasting on earth-rock dams and determining the partition control measures.
引文
[1]国家质量监督检验检疫总局.GB6722-2003.爆破安全规程[S].北京:中国标准出版社,2003.
[2]中华人民共和国国家发展和改革委员会.DL/T5333-2005.水电水利工程爆破安全监测规程[S].北京:中国电力出版社,2006.
[3]吕涛,石永强,黄诚,等.非线性回归法求解爆破振动速度衰减公式参数[J].岩土力学,2007,28(9):1871-1878.
[4]中华人民共和国国家质量监督局,建设部.GB50487-2008.水利水电工程地质勘察规范[S].北京:中国计划出版社,2009.
[5]张艳锋.深覆盖层上堆石坝地震响应分析[J].水利与建筑工程学报,2008,6(3):37-38,50.
[6]中华人民共和国国家经济贸易委员会.DL/T5135-2001.水电水利工程爆破施工技术规范[S].天津:天津大学出版社,2002.
[7]刘立新,刘晓军,黄宁.三峡三期上游围堰拆除爆破大坝振动安全监测[J].人民长江,2007,38(11):139-140,156.
[8]许红涛,卢文波,蔡联鸣.邻近爆破对坝基灌浆帷幕的影响机理研究[J].岩石力学与工程学报,2004,23(8):1325-1329.
[2]中华人民共和国国家发展和改革委员会.DL/T5333-2005.水电水利工程爆破安全监测规程[S].北京:中国电力出版社,2006.
[3]吕涛,石永强,黄诚,等.非线性回归法求解爆破振动速度衰减公式参数[J].岩土力学,2007,28(9):1871-1878.
[4]中华人民共和国国家质量监督局,建设部.GB50487-2008.水利水电工程地质勘察规范[S].北京:中国计划出版社,2009.
[5]张艳锋.深覆盖层上堆石坝地震响应分析[J].水利与建筑工程学报,2008,6(3):37-38,50.
[6]中华人民共和国国家经济贸易委员会.DL/T5135-2001.水电水利工程爆破施工技术规范[S].天津:天津大学出版社,2002.
[7]刘立新,刘晓军,黄宁.三峡三期上游围堰拆除爆破大坝振动安全监测[J].人民长江,2007,38(11):139-140,156.
[8]许红涛,卢文波,蔡联鸣.邻近爆破对坝基灌浆帷幕的影响机理研究[J].岩石力学与工程学报,2004,23(8):1325-1329.
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