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In the present specification , the Gravity Wharf Rubble Bed stress calculation assumes rigid foundation bed not consider base bed , rear earth pressure , only consider the stress of the base bed its own weight and the base top down spread . With the deepening of the depth of the the large gravity wharf Rubble bed base bed , rear earth pressure is constantly increasing, this method of calculation of the existing norms and the actual situation there may be a greater difference . In this paper, the calculation of the system , research , analysis of thick the riprap -based bed behind the earth pressure on the stress distribution in the base bed , according to the finite element software PLAXIS calculate the stress distribution law , put forward a more reasonable improved calculation method . First of all, there is still the the current normative assumptions about rigid foundation bed , and consider the base bed , earth pressure in the rear , a new formula , by comparing the theoretical calculation of project examples , can be found , consider , without regard to the base bed the earth pressure in the rear of the base bed stress distribution is great , , can not be ignored in the case of thick foundation bed base bed , rear earth pressure . Secondly , the use of large-scale geotechnical finite element software PLAXIS numerical simulation analysis of engineering examples , summarize the foundation bed internal stress distribution law , and by the adjustment of model parameters to discuss the influencing factors of the foundation bed internal stress distribution law . Finally, based on the finite element simulation results based bed stress distribution law , and considering the base bed , rear earth pressure theory deduced improved calculation method using the three control points , and calculation of engineering examples to prove this kinds of improved calculation method more accurately reflect the actual distribution of the stress of the foundation bed rule. The the perfect of gravity quay thick rubble bed design theory in-depth research and a lot of calculation , calculated through engineering instance , Chapter this improved calculation theory has some practical value 's .
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