摘要
本区水域的地质灾害分为直接的、潜在的和人为的三种,类型有冲刷槽、滑坡、活动沙波和沙脊、不稳定岸坡、快速侵蚀和堆积,浅滩和暗礁,埋藏古河道、古洼地、埋藏基岩、含气沉积物、“鸡蛋壳”地层,断层和地震,人为障碍物等。本文讨论了各类水域地质灾害的分布、特征、对工程建筑的影响和防治措施。
The major geohazards in the underwater areas near Shanghai can be classified into direct, potential and artificial. These geohazards include scoured trough, slider, active sand wave, sand ridge, unstable slope, rapid-erosional and accumulation areas, shoal, reef, bur iedehannel and palaeo-depression, buried-bedrock, gas-changed sediment,'stiff shell stratum', fault and earthquake, human activity. The distribution, influence on engineering facilities and protection measures against them are discussed in the paper.
