天津港口门附近淤积与减淤措施

天津港口门附近的已投产深水泊位自2008年11月运行以来水深一直处于淤积、浚深的交替变化状态,码头前平均回淤强度约1～1.5 m/月,淤积强度远大于理论强度。从天津港的泥沙来源、正常情况下港内泥沙淤积、近期水深对比、疏浚施工等多个角度分析了造成实华原油码头泊位、港池泥沙淤积偏重的原因主要是疏浚施工的影响,又以航道内耙吸船施工影响为最大,预测了该港池的正常年淤积厚度应在0.7 m/a以内,提出了降低深水泊位淤积可采用扩大深水泊位面积和增加局部段航道水深等措施。

Sedimentation and siltation-reduction methods near entrance of Tianjin port

The commissioned deep water berths near the entrance of Tianjin Port have been in the alternation of siltation and dredging since their coming into use in November,2008.The monthly mean back silting intensity in front of the docks is 1～1.5 m,which is far more than the theoretical intensity.This paper analyzes the reasons for heavy siltation near oil docks and in harbor based on the sediment source of Tianjin Port,the normal siltation,the recent depth contrast,the dredging project and so on,which is mainly caused by dredging project.And the standpoint that siltation can be decreased by enlarging area of deep water berths and increasing partial channel depth is put forward based on that working with suction dredger in the channel has the largest impact and the prediction that the normal annual average siltation thickness in smaller than 0.7 m.