Stress Characteristics And Anti-floating Application Of "Pile-wall Interaction" Composite Support Structure

“Pile-wall interaction”,as the name suggests,is to connect the pile and the wall in a certain way,so that the two are integrated.Urban development and renewal until now.People will evaluate a new building for environmental protection and economy.In particular,the requirements of the basement are becoming more and more demanding.The emergence of “Pile-wall interaction”has better met this demand.However,there are few “pile wall combined” composite support structures in China,and there are not many corresponding instructions in the specification.The design calculation method are not enough to calculate the project,Many scientists want to develop a practical design method.The author has read a lot of papers related to "the combination of pile and wall",enumerated the articles that have been referenced in this paper,and analyzed and summarized them to some extent,and discussed the force of the composite structure of “Pile-wall interaction”.The characteristics and anti-floating application,in order to provide a new idea to study the purpose of“Pile-wall interaction”technology.The study hope promote the "pile wall interaction" technology.In this paper,the working state of“Pile-wall interaction”composite supporting structure system and the anti-floating application are studied in depth.The main contents are as follows:(1)According to the time axis,the research results of " Pile-wall interaction " are listed in recent years,and the research results of each research are insufficient and can be improved,and the starting point and main content of this paper are extracted.(2)Combining the foundation pit engineering using the“Pile-wall interaction” composite supporting structure in Guangzhou,using the MIDAS finite element platform to build a three-dimensional model,simulating the whole process from earth excavation until the building reaches the permanent use stage,establish The three-dimensional model including the basement slab,the outer wall of the basement,the force transmission slab,the inner support,etc.discusses the force characteristics of the composite structure of the “Pile-wall interaction”(the displacement deformation of the soil,the component Internal force and deformation law).The field monitoring data compared with the simulation results to verify the accuracy of the high-precision 3D model.(3)Through the whole process simulation of the composite structure of“Pile-wall interaction”,the internal force deformation data of the support pile,the underground outdoor wall and the inner support are obtained,and the traditional support is abandoned(the support structure is abandoned after the foundation pit project is finished).Compare in the form of underground).Summarize and analyze the similarities and differences between composite support structure and traditional support.(4)Exploring the permanent use stage,in the“Pile-wall interaction” support system,how the support structure and the basement will share the load in the horizontal direction after the connection of the force transmission plate.(5)According to the relationship between the embedding position of six different underground structures and underground aquifers,the calculation of anti-floating design water level is studied in detail.In addition,the finite element analysis software was used to simulate the most dangerous situation of anti-floating in the basement construction.The MIDAS finite element analysis platform was analyzed separately: the self-weight method,the extended substrate method,and the“Pile-wall interaction” composite structure anti-floating.Compare the advantages and disadvantages of the three anti-floating methods.According to the corresponding support piles and the underground outdoor wall and the internal deformation data of the basement floor,the law is explored.