Analysis Of The Influence Of Sluice Foundation On The Structural State Of The Sluice Chamber

In the process of actual engineering operation,the foundation of the water gate will have an impact on the structural behavior of the gate chamber,that is,on the deformation,stress,and stability of the gate chamber.This article selects multiple water gates and takes practical engineering as an example to study the effects of foundation treatment,seepage,and other factors on the structural behavior of the gate chamber.The main research content of this article is as follows:(1)Establish a three-dimensional finite element model to analyze the stress settlement of the natural foundation and composite foundation water gate chamber.Research has found that composite foundation can effectively reduce the settlement and stress value of the gate chamber;set the ratio of foundation deformation modulus to the elastic modulus of the gate chamber concrete to λ,and analyze the influence of different λ values on the settlement stress of the gate chamber.The study found that the maximum settlement,maximum principal tensile stress,and maximum principal compressive stress of the gate chamber decrease with the increase of λ;Study the sensitivity of composite foundation to changes in pile parameters,and investigate the effects of pile length,pile spacing,pile diameter,and pile cement content on the upper structure of the gate chamber.(2)Analyze the seepage method,theory of seepage,coupling effect between seepage and gate chamber structure,and analyze the behavior of natural foundation and gate chamber when seepage occurs from two aspects:pore pressure and seepage velocity;Study the influence of rainfall infiltration on the pore pressure,total displacement,and vertical displacement of the gate chamber structure.The research results show that rainfall infiltration can reduce the pore water pressure at the top of the soil and the bottom of the gate foundation;The maximum values of total displacement and vertical displacement decrease;Analyze the influence of soil material parameters and seepage conditions on the safety of the gate chamber under the coupling effect of seepage stress.The results show that the safety coefficient of the gate chamber is highly sensitive to soil cohesion,internal friction angle,and shear expansion angle,and is highly sensitive to water head difference.(3)The deep anti sliding of the sluice is studied by the combination of the plastic zone breakthrough in the strength reduction method and the sudden change of the characteristic point displacement;Taking the cast-in-place pile as an example,it is found that the strength of the pile shaft in the pile foundation sluice should be regarded as the control condition for the stability calculation of the sluice chamber.Analyze and study reliability analysis methods and use Monte Carlo method to analyze actual projects;Using the theory of grey correlation analysis,it is concluded that the soil parameter with the greatest impact on the stability of the gate chamber is the internal friction angle of the soil;Using grey system to predict the safety of water gates,research has shown that the accuracy of the grey verhulst model is higher than that of the improved DGM(1,1)model,and it can be more suitable for practical engineering.