Spud-soil Mechanism Of Interaction And Jack-up Stability Analysis

With the development of world’s offshore oil and gas exploration,promoting the rapid research of ocean engineering equipment.Jackup platform with shoe because of its high bearing capacity,good stability,and multi-adaptive advantages is widely used in various offshore platforms.When jackup platform encounter extreme environment will lead to shoes puncture even capsized,causing inestimable economic losses,so the study of puncture and platform stability shoe is essential.Interaction between pile and soil is a very complex system,It’s currently proven by the theoretical research on the basis of a large number of field tests,also it’s consistent with the actual laws.There is no perfect design and calculation methods nowdays.Therefore,the study of pile-soil interaction mechanism and stability of jackup platform is necessary.Due to pile-soil interaction of complexity and diversity and boots into the mud piles of complex conditions,the subject based on empirical formula for normal soil mechanics,according to DNV specification,shoe capacity were calculated in different soil penetration,and the anti-sliding pile boots were checked.To cover the shortage of calculation,based on the shoe and mechanism of soil,using nonlinear finite element method established the pile shoe with finite element model of soil.Studied under different conditions of boots bearing capacity of pile and soil parameters.Studies have shown that when the penetration depth is equal,boots foundation bearing capacity of piles with the increase of internal friction angle of a nearly linear growth.In addition,the subject analyzed soil displacement nearby when found shoes through membership in regional soil heave within the 1 times radius.Under the topic of embedded depth of soil near the shoe liquidity analyses and found a shoe-side upper cavity,under pile-side soils have been pushed upwards into the pile,cavity was damaged.Subjects last theory calculations verified by experiment and numerical simulation results showing theoretical calculation and numerical simulation results and actual conditions within the range error,in the context of the conditions laid down to meet computing needs.