岱山樱连门促淤围垦工程围堤地基爆破挤淤悬浮泥沙输移扩散模拟研究  

Transport and diffusion of suspended sediment caused by mud displacement by blasting

作　　者：彭辉[1] 袁金雄[1] 

机构地区：[1]浙江大学港口海岸与近海工程研究所,浙江杭州310058

出　　处：《水运工程》2012年第8期16-21,共6页Port & Waterway Engineering

摘　　要：爆破挤淤填石法作为地基处理的一种常用方法,广泛应用于沿海养殖围堤、围海造地、护岸以及防波堤等水工工程的淤泥质软土地基处理。在对岱山樱连门促淤围垦工程围堤地基爆破挤淤处理产生的悬浮泥沙输移扩散进行模拟的基础上,分析了爆破挤淤对周围海域的影响。研究结果表明,爆破挤淤所产生的悬浮泥沙的输移扩散受潮流的影响较大,其输移扩散的范围及方向很大程度上取决于爆破后工程区域附近潮流的水动力强度及方向。爆破挤淤后产生的悬浮泥沙浓度增量由于扩散和沉降作用迅速减小,在爆破3 h后基本降至10 mg/L以下。爆破挤淤施工中产生的悬沙对周围的水环境虽然有一定的影响但持续时间并不长,且影响范围有限。In recent years,the toe-shooting method is widely applied to handling soft foundation of many offshore engineering projects such as building breakwaters,shore protections and reclamation of land from the sea as a commonly method.We analyze the impact on adjacent waters resulting from the blasting in the foundation of simulating the transport and diffusion process of the suspended sediment caused by toe-shooting method applied to the promotion and reclamation project located in Daishan.The result shows that the transport and diffusion of suspended sediment are predominantly affected by the current movement,the direction and scope of the former are determined to a great extent by the direction and dynamics of the latter.The content of suspended sediment rapidly decreases as a result of diffusion and silting.The content increment could basically reach the level below 10 mg/L within 3 hours after the blasting.The blasting has some impact on water environment of neighboring waters,but the duration is limited and the incidence is limited too.

关 键 词：爆破挤淤 悬浮泥沙 输移扩散 岱山 

分 类 号：TU473[建筑科学—结构工程]