某既有建筑群地面沉降机理与防治措施

MECHANISM AND PREVENTION MEASURES OF GROUND SUBSIDENCE IN AN EXISTING BUILDING GROUP

岩溶山区既有建筑群中常发生地面沉降,为类似工程的安全使用及后期治理维护,利用深层地质钻探,跨孔电阻率CT,静力水准的方法进行勘察、监测,并用可视化数据处理技术对勘察、监测等测试数据进行处理研究某既有建筑群的地面沉降机理。研究表明研究区的地面沉降是岩溶地质问题产生的局部沉降,是岩溶地基岩土体的蠕动和岩体裂隙闭合等所致,是地质、岩、土、水、岩溶地下空间、岩溶扩张等不良因素共同作用的产物。研究技术及防治措施对类似既有建筑群地面沉降的安全使用及加固治理具有参考价值。

Land subsidence often occurs in existing building complex in karst mountain areas.In order to ensure the safe use and later management and maintenance of similar projects,investigation and monitoring are taken by the methods of deep geological drilling,cross-hole resistivity CT,and static leveling with visual data processing technology to study the land subsidence mechanism of an existing building complex.The results show that the land subsidence in the study area is the local subsidence caused by karst geological problems,which is the peristalsis of rock and soil and the closure of rock fissures in karst foundation.It is the product of the joint action of bad factors such as geology,rock,soil,water,karst underground space,karst expansion and so on.The research technology and prevention measures are of reference value for the safe use and reinforcement treatment of the land subsidence of similar existing building complex.