Analysis Of The Influences Of The Karst Foundation On Ship Locks Chamber Internal Force And Reliability

As a special kind of geology，karst is more widely distributed in China. With thelarge-scale traffic engineering construction, the harms caused by karst has becomeincreasingly prominent. The karst area has abundant water resources advantages; itprovides the necessary conditions for the construction of the ship lock and navigationstructures. So it is critical to research the security-stability and reliability of the builtor to be built the ship lock in the karst area.The article depends on the Lianjiang River Huaxi ship lock correlation data，Karst foundation-lock chamber structure has carried on the simplification, and usingthe ANSYS software based on finite element method to simulate calculation lockchamber structure analysis. The main contents include：(1) Against the actual situation of the ship lock structure of hydraulic structuresin karst areas, the article selects structure internal force and reliability of the ship lockon karst foundation as a research object, summarizes the wide distribution of karstand the dangers of the project, and reviews the research status of the karst, ship lockand reliability.(2) According to the geological exploration data, this article describes the basesize and distribution of the karst cave in the Lianjiang River Huaxi ship lock, usingANSYS, construct karst foundation-the upper ship lock chamber structure of thecoupling mechanical model, calculate the ship lock chamber structure on the karstcave, and compare with the foundation no cave, analysis of cave adverse effects onthe ship lock chamber. And using the engineering actual observation data verify thefinite element method is applicability and feasible.(3)The influence of the thickness of upper, the height of karst cave, the width ofkarst cave, horizontal position of karst cave and the parameters of rock mass on theship lock chamber structure in the single and various projects are studied in thisarticle. By using Linear regression gives the fitting formula of chamber maximumsubsidence and maximum tensile stress in multi-factors projects.(4)Using ANSYS software PDS module, by Combination of the Monte Carlomethod and the finite element method，select the karst cave size, central location, thelock chamber and foundation material parameters as input parameters, select themaximum displacement and maximum stress of the ship lock chamber as an outputparameter, analysis of the reliability of the ship lock chamber structure on the karst cave, get important information on structural reliability.