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解放以来,浙江宁波地区兴建了100万米~3以上的水库76座,总蓄水量6亿米~3,其中修建在软粘土地基上的28座,蓄水量为3亿米~3.另外还修建了海塘409公里,其中324公里建于软粘土上.过去,由于对软粘土地基在设计和施工中处理不当,曾多次发生堤坝坍滑事故。从70年代起,采用砂井、砂垫层等措施,增强了地基稳定性,为我区软粘土地基筑坝打开了新局面。 一、软粘土地基概况 (一)软粘土的特性及分布情况 宁波地区的软粘土系属于第四纪海岸沉积,常见的可分两种情况:
Since the liberation, Ningbo has built 76 reservoirs of 1 million meters to 3 above with a total storage capacity of 600 million meters to 3, of which 28 are built on soft clay foundations with a water storage capacity of 300 million meters to 3. In addition, 409 kilometers of seawalls were constructed, of which 324 kilometers were built on soft clay. In the past, due to improper handling of the design and construction of soft clay foundations, slump and slump accidents occurred several times. From the 70s onwards, the use of sand wells, sand cushion and other measures to enhance the stability of the foundation for our soft clay foundation dam opened a new situation. First, the overview of soft clay foundation (A) the characteristics and distribution of soft clay Soft clay in Ningbo area belongs to the Quaternary Coastal Sediment, the common can be divided into two situations: