Investigation Of Land Subsidence Effects On Hydraulic Characteristics Of Different Types Sluice

As a kind of low head building,the lock project was generally built on the soft foundation in plain area,ground subsidence phenomenon usually appear in these places,somewhere is serious,as Tianjin and the Yangtze river delta region.The hydraulic characteristics of different types of locks was studied on the ground subsidence phenomenon in this paper.According to the different function of locks,the lock project can be divided into check lock,into the flood lock,ebb lock and so on.According to the different form of lock chamber structure,lock can be divided into the breast wall type lock,open type lock and so on.For example,Xihe Check Lock,Duliujianhe Into the flood Lock and Haihe Ebb Lock in Tianjin area were selected as the research objects in this paper.The structure form of Xihe Lock is breast wall type,the structure form of Duliujianhe Lock and Haihe Lock are open type.At the same time,considering the different ground subsidence of the locks,the influence of hydraulic characteristics of locks on ground subsidence was researched.Fluid mechanics calculation software was used to the actual lock water for 3-D numerical simulation in this paper.Take Xihe Lock as an example,three-dimensional numerical model is established and the influence law of ground subsidence factors on the lock were studied.The dirty state and velocity distribution in the Check lock under the different ground subsidence were obtained.Because of Xihe Check Lock is a type of breast wall lock,the influence law of hydraulic characteristics of the breast wall type lock under the ground subsidence was studied.Take Duliujianhe Lock as an example,three-dimensional numerical model is established and the influence law of ground subsidence factors on the lock is studied.The dirty state and velocity distribution in the Into the flood lock under the different ground subsidence were obtained.Because of Duliujianhe Lock is a open type lock,the influence law of hydraulic characteristics of the open type lock under the ground subsidence were studied.Take Haihe Lock as an example,three-dimensional numerical model is established and the influence law of ground subsidence factors on the lock is studied.The dirty state and velocity distribution in the Moistureproof Lock under the different ground subsidence were obtained.Because of Haihe Lock is a relatively special open type lock,it is two-way water retaining.Only when the upstream water level is greater than the downstream tidal level,the Lock wall open,and due to upstream inflow is less,the Lock generally need to open a certain opening.Only when the design condition was meeted,the lock will fully open.Study of moistureproof brake reflects the influence law on two types of hydraulic characteristics under the ground subsidence was studied.In this paper,Xihe Lock,Duliujianhe Lock and Haihe Lock were studied,he lock chamber structure belongs to breast wall type and open type respectively.According to 3-D numerical simulation of the hydraulic characteristics of two type forms of lock chamber structure,the hydraulic characteristics and the influence law of the ground subsidence of the two types of lock chamber structure form were obtained.Research results has reference value and guiding significance for similar lock engineering.