| In view of the problems existing in the construction of Vietnam’s coastal defense port Lach Huyen,the optimization of its construction scheme and the stability of seismic dynamic response are studied.Lach Huyen Port,Vietnam’s coastal defense,is located near the coast and the inflow of rivers into the sea.There are deep soft Quaternary overburden buried under the seabed.Its main types are Delta facies,littoral facies,lacustrine facies and fluvial alluvial deposits.In order to quantitatively grasp the deformation behavior and failure law of the soft soil engineering in Lach Huyen Port,it is particularly important and important to predict the possible damage and adopt appropriate engineering countermeasures,to establish a calculation model reflecting the coupling effect,to optimize the construction scheme and to study the stability characteristics of the seismic dynamic response of the soft soil engineering in Lach Huyen Port.Research significance.Based on the research status and existing problems at home and abroad,the research on vertical wharf is carried out.Vertical wharf is convenient for ship mooring,loading and unloading and vehicle operation.Relying on the general situation of the project,the main contents and technical routes of the optimization of the construction scheme and the stability of the seismic dynamic response of Vietnam’s coastal defense Lach Huyen Port are studied.On the basis of summarizing the theory of soft seabed treatment and dynamic response,the design and construction analysis of large wharf berths are mainly carried out.The finite element fluidsolid coupling analysis methods are studied:theoretical analysis method of unsaturated seepage characteristics,constitutive relationship model of rock and soil,parameters and validity of hardening model HS(Hardening Soil Model).Definite method,constitutive model of soft soil/weak interlayer,strength reduction method of finite element,principle and method of seismic dynamic response analysis.Based on the basic structural characteristics of high-piled slab/pile-beam-slab wharf,the Japanese wharf scheme and typical reinforcement treatment scheme,the Japanese wharf optimization scheme are carried out,the new scheme of Chinese wharf is discussed,and the construction design scheme of high-piled slab-beam wharf of Lach Huyen Port is studied in depth.Based on the dynamic analysis method of finite element numerical simulation,the fluid-structure coupling and dynamic response analysis model of high-piled sheet wharf is established,and the mechanical characteristics of suspended highpiled sheet wharf,rock-socketed high-piled sheet wharf,traction high-piled sheet wharf and traction high-piled sheet wharf are developed.The dynamic characteristics of seismic response of high-piled slab wharf and the stress characteristics of seismic response of traction high-piled slab wharf after reinforcement treatment reveal the characteristics of fluid-solid coupling seismic response of high-piled slab Wharf in Japan.Based on the in-depth analysis of the solid simulation technology of 3D row pile element for 2D plane strain problem,the simulation principle of 3D row pile element for 2D plane strain problem is established,and the fluid-solid dynamic response analysis of high-pile beam-slab+traction suspension high-pile-slab Wharf under fluid-solid coupling earthquake(Japan),high-pile beam-slab+traction rock-socketed high-pile-slab wharf are carried out.Coupled seismic dynamic response analysis,fluidstructure coupling seismic response analysis of high-piled beam-slab+traction suspension highpiled slab+back-pressure slope protection wharf,fluid-structure coupling seismic dynamic response analysis of high-piled pier bridge+traction suspension high-piled slab wharf,comparative analysis of fluid-structure coupling seismic response of high-piled beam-slab wharf are carried out,and Vietnam coastal defense La is recommended.The key construction technology of Ch Huyen Port.Aiming at the structural analysis and design of high-piled beam-slab wharf in the construction of Lach Huyen Port in Vietnam coastal defence,the structural design of high-piled beam-slab wharf and high-piled beam-slab wharf are further carried out,and the key technology for the construction of high-piled beam-slab wharf and the design and construction technology of high-piled beam-slab loader wharf are established to realize Vietnam coastal defence Lach.The optimization of Huyen Port construction scheme and the study of its seismic dynamic response stability can provide reference for the construction of Lach Huyen Port of Vietnam’s coastal defense. |
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