软基上水工建筑物的变形监测实例分析

Case Study of Deformation Monitor of Marine Construction Based on Soft Foundation

由几个水工建筑物的变形实例说明应重视软土地基基础的处理工作:填方工程应依据变形监测数据进行施工;挖方工程除按变形监测数据进行施工外,还应注意临空面的保护;堤防工程中有穿堤建筑物时,最好先行堤防施工,待堤基稳定后再进行穿堤建筑物的施工,以避免基础发生较大的沉降。沉降监测基准点的基础埋深最好与主体结构基础埋深相当;对于长、折大堤的水平位移监测,宜采用测斜管;穿堤建筑物及直接座落在软土地基上的水闸、泵站等水工建筑物的水平位移监测,应重视高填土翼墙向河心的水平位移情况,要求基点稳定,采用假定的独立坐标系进行测试方即可满足监测要求。

Taking some marine constructions deformation as examples,the treatment for soft foundation should be emphasized.The embankment project should be constructed basis on the deformation monitor data,also should pay attention to the protection of free surface.When levee building exists in the embankment project,the embankment should be constructed fist,and then levee building will be constructed after the foundation is stabile,so that the large deformation can be avoid.The reference point for monitor should be imbedded the same as the main structure.As for horizontal displacement monitoring of long levee,the inclinometer tube should be preferred.For another situation,when the water gate and pumping station directly located in the soft ground,the horizontal displacement monitoring should be pay more attention to the wing wall shift to the central of water and the reference point should be stable.In addition,the assumed independent coordinate system should be adopted in order to meet the requirements of monitoring works.