| As the most commonly used construction method in grain silo structure,hydraulic sliding mode construction has absolute advantages compared with other construction methods.It can effectively improve the mechanization level of grain silo construction,and the characteristics of continuous construction can also better ensure the integrity of the silo structure and greatly improve the construction speed.However,the dynamic continuous jobs and the uniqueness of sliding mode construction lead to the poor quality control of sliding mode construction,and it is difficult to change the quality problems once they occur.Therefore,in the process of sliding mode construction,we should abandon the passive lag.We need to guard against the factors that are easy to lead to poor slide mold construction quality,advance control,to ensure that the silo construction meets the accuracy requirements of the construction,so as to better control the whole sliding mode construction process,to ensure the construction quality of the silo.Therefore,this paper takes the new 200,000 tons large diameter shallow circular warehouse project built by a company in Henan as a reference example and identifies 11 factors that will affect the construction accuracy of grain silo sliding mold.In this paper,ISM-MICMAC method and AHP method are used to study the identified influencing factors,establish the multi-layer transmission model of grain silo sliding mode construction accuracy,and calculate the weight ratio of each influencing factors,clarify the relationship between the influencing factors,and find out the most important factors affecting the construction accuracy of sliding mode.In addition,the construction load affecting one of the construction accuracy is analyzed by finite element method.ANSYS software establishes the finite element model of silo and sliding die system and makes the static analysis of silo structure under different loads in the construction process,and the following conclusions are drawn:(1)The grain silo hydraulic sliding die construction accuracy influence factors of ISM model divided 11 factors into four grades,make the complex relationship between the factors tend to be organized and hierarchical,can be seen from the model of the support rod bending instability,hydraulic jack rise is the most direct factors affecting the silo sliding die construction accuracy.(2)Through the calculation of the weight ratio between the influencing factors,the synchronous rise of the sliding mode construction and the weights of 0.1649 and 0.1427 respectively,which determine the importance of the two factors to ensure the accuracy of the sliding mode construction.(3)Through the different load of granary barn wall and sliding mode system finite element model,the system under multiple stress strain analysis,found that a small range of load will cause direct impact near the load,easy to cause the deformation of the climbing rode,increase the size of the load range,can reduce the deformation of the climbing rode.Then the displacement value of the internal and external platforms is greater than the internal and external platforms respectively.Therefore,in the sliding mode construction platform,the stacking range should be increased as much as possible and the size of the stacking load should be reduced,and the small stacking range should be placed on the outer platform as far as possible.In addition,by comparing the deformation value of φ25 round steel climbing rode under the same stacking condition,the superior performance of φ48.3×3.5 steel pipe climbing rode in the process of sliding mold construction is affirmed. |
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