单次冲击能量及P-S曲线测桩法
|
摘要
通过研究打桩公式法和应力波动法 (如CASE法 ) ,提出单次冲击能量及P S曲线测桩法 :用重锤或小型火箭筒一次冲击桩顶 ,用桩顶附近的检波器记录振波图和检测静、动位移 .通过实测冲击能 (总能量 )转换系数、波动和振动各自消耗的能量等各物理量 ,测定计算单桩竖向承载力 .利用振波图计算力 (P)与位移 (S)动态关系曲线 ,确定屈服点 ,并利用静载荷试验检验动测结果和确定动静P S曲线的相关常数 ,进而确定与承载力相应的沉降量 .而且 ,可由PS曲线的形态判定桩身成型质量 .
By studying the pile-formula and stress-wave methods (e.g., CASE method), the authors propose a new method for testing piles using the single-impact energy and P-S curves. The vibration and wave figures are recorded, and the dynamic and static displacements are measured by different transducers near the top of piles when the pile is impacted by a heavy hammer or micro-rocket. By observing the transformation coefficient of driving energy (total energy), the consumed energy of wave motion and vibration and so on, the vertical bearing capacity for single pile is measured and calculated. Then, using the vibration wave diagram, the dynamic relation curves between the force (P) and the displacement (S) is calculated and the yield points are determined. Using the static-loading test, the dynamic results are checked and the relative constants of dynamic-static P-S curves are determined. Then the subsidence quantity corresponding to the bearing capacity is determined. Moreover, the shaped quality of the pile body can be judged from the formation of P-S curves.
By studying the pile-formula and stress-wave methods (e.g., CASE method), the authors propose a new method for testing piles using the single-impact energy and P-S curves. The vibration and wave figures are recorded, and the dynamic and static displacements are measured by different transducers near the top of piles when the pile is impacted by a heavy hammer or micro-rocket. By observing the transformation coefficient of driving energy (total energy), the consumed energy of wave motion and vibration and so on, the vertical bearing capacity for single pile is measured and calculated. Then, using the vibration wave diagram, the dynamic relation curves between the force (P) and the displacement (S) is calculated and the yield points are determined. Using the static-loading test, the dynamic results are checked and the relative constants of dynamic-static P-S curves are determined. Then the subsidence quantity corresponding to the bearing capacity is determined. Moreover, the shaped quality of the pile body can be judged from the formation of P-S curves.
引文
胡毅力,许峻,段永康,等.2004.波列振幅P S曲线测桩法[J].地震学报,26(6):660～668
徐攸在,刘兴满.1989.桩的动测新技术[M].北京:中国建筑工业出版社,188～199,258～336
中国建筑科学研究院.1991.锤击贯入试桩法规程CECS 35:91[A].见:刘金砺主编.桩基工程检测技术[M].北京:中国建筑工业出版社,293～310
中华人民共和国行业标准.2003.建筑基桩检测技术规范JGJ1062003[M].北京:中国建筑材工业出版社,13～18,32～44
中华人民共和国行业标准.2002.建筑地基处理技术规范JGJ792002[M].北京:中国建筑材工业出版社,80～81
中华人民共和国国家标准.2002.建筑地基基础设计规范GB500072002,附录Q[M].北京:中国建筑工业出版社,136～138
BromsBB ,ChooLP .1988.Asimpledrivingformulabasedonstress wavemeasurements[A].In:Proc3rdInternationalConferenceonApplicationofStress waveTheorytoPiles[C].Ottgwa:CanadaPress,826～841
FelleniusBH .1988.VariationofCAPWAPresultsasafunctionoftheoperator[A].In:Proc3rdInternationalConferenceonApplica tionofStress waveTheorytoPiles[C].Ottawa:ConadaPress,814～825
RauscheF ,GobbleGG ,LikinsE .1985.Dynamicdeterminationofpilecapacity[J].JGeotechnicalEngineering,ASCE ,111(3):367～383
徐攸在,刘兴满.1989.桩的动测新技术[M].北京:中国建筑工业出版社,188～199,258～336
中国建筑科学研究院.1991.锤击贯入试桩法规程CECS 35:91[A].见:刘金砺主编.桩基工程检测技术[M].北京:中国建筑工业出版社,293～310
中华人民共和国行业标准.2003.建筑基桩检测技术规范JGJ1062003[M].北京:中国建筑材工业出版社,13～18,32～44
中华人民共和国行业标准.2002.建筑地基处理技术规范JGJ792002[M].北京:中国建筑材工业出版社,80～81
中华人民共和国国家标准.2002.建筑地基基础设计规范GB500072002,附录Q[M].北京:中国建筑工业出版社,136～138
BromsBB ,ChooLP .1988.Asimpledrivingformulabasedonstress wavemeasurements[A].In:Proc3rdInternationalConferenceonApplicationofStress waveTheorytoPiles[C].Ottgwa:CanadaPress,826～841
FelleniusBH .1988.VariationofCAPWAPresultsasafunctionoftheoperator[A].In:Proc3rdInternationalConferenceonApplica tionofStress waveTheorytoPiles[C].Ottawa:ConadaPress,814～825
RauscheF ,GobbleGG ,LikinsE .1985.Dynamicdeterminationofpilecapacity[J].JGeotechnicalEngineering,ASCE ,111(3):367～383
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心