数值模拟在工程事故鉴定中的综合分析与应用

Comprehensive Analysis & application of numerical simulation with FLAC3D in appraising for engineering accident

近来来,新建的高层、超高层与周边建筑距离不断减小、且多采用桩基础。由于桩基础施工会产生挤土和振动效应,由于大多数没有发生灾难性后果,工后经历较长时间后纠纷仍无法解决的情况时有发生,而此时又无法界定原施工时对周边影响的范围和程度,需要通过其它方法来实现。这需要通过现场勘探、测试、观测、检测获取必要数据,再通过数值模拟分析还原其影响范围、程度,结合施工特点综合分析,进而为鉴定、评估工作提供技术支持。

Recently, distance between new high-rise and existing building becomes shorter and shorter, that requires the useof pile-foundation usuallly. Soil squeezing & vibration effect will affect the surroundings in construction process ofpile-foundation, and then dispute between constructor and local residents sometimes can't be settled in a long time. Theinfluence of area and extent in constution can't be determined clearly, it needs other ways to find out. That needs to obtainsfield actual data by prospecting, testing, observation, detection. Then the effects of influence will be restored by numericalsimulation.It provides the technical supports in appraising or assessment for engineering accident.