Supporting Design And Numerical Simulation Study Of Horizontal Pulling Anchor Between Adjacent Deep Foundation Pits

Nowadays,the urban land is becoming more and more scarce,so the supporting problem of adjacent deep foundation pit is inevitable,and the horizontal support of the pulling anchor cable as a new type of support method is particularly unique in adjacent deep foundation pits.In this paper,an adjacent deep foundation pit in Guangzhou is taken as an example to study the horizontal pulling anchor cable support structure.Firstly,the research status and characteristics of adjacent deep foundation pits and horizontal tension anchor cables are expounded.Then the relevant theories of horizontally anchored cable design calculations are introduced.Finally,design calculations,numerical simulations and comparisons are carried out through engineering examples.analysis.The research contents are as follows:(1)Through the analysis of common pile anchor support and horizontal tension anchor cable,the characteristics and application of horizontal anchor cable are summarized.(2)Taking section 13-13 of an adjacent deep foundation pit in Guangzhou that the author participated in as an example,using Lizheng software to design and calculate,and checking the stability and embedded depth of the foundation pit.At the same time,a monitoring scheme was laid out and on-site monitoring data were collected afterwards.(3)The numerical simulation was carried out by using Midas GTS NX software.In this paper,two methods including unilateral excavation and bilateral symmetrical excavation were set up to analyze the horizontal displacement,vertical displacement and internal force of the supporting structure under each construction condition.(4)The design value,simulation value and monitoring value are analyzed to verify each other,so as to verify the rationality of the design and the accuracy of the simulation results.(5)The time sequence effect of construction of adjacent deep foundation pits is analyzed,and the importance of time sequence in the construction of adjacent deep foundation pits is discussed.By analyzing the simulation results of three construction sequence schemes to determine the optimal scheme.The results of this paper provide reference for the design of adjacent deepfoundation pits and the application of horizontal anchor cables.At the same time,the study on the construction sequence of adjacent deep foundation pit supported by anchor rope has certain guiding significance to the field construction.