Analysis On The Influence Factors Of Prestressed Anchor Cable Composite Soil Nailing Wall

With the rapid development of science today,Along with the construction of high-rise building basement and subway,There will be more and more Deep foundation pit engineering.At present, There are many other forms used in the Deep foundation pit engineering,According to the structure stress situation Can be summarized as Pile wall supporting structure,soil nailing wall,Gravity retaining wall,Arch wall and etc,But in the practical engineering.The soil nailing support is widely used.But it also have many problems,For example, in some deformation control over the allowable deformation of the strict site,Therefore,The soil nailing support is often combined with bore pile,Micro pile,Pre-tensioned bolts(anchor rope) etc.However,the current design theory is not perfect,some of the important problem such as the Comparison of calculation theory and the actual situation of soil pressure,The internal force of retaining structure changes are not in well conclude,This article mainly make quantitative analysis on prestressed anchor cable composite soil nailing wall support and the traditional soil nailing wall support in practical engineering application.Combined with practical engineering, with the method of numerical simulation to evaluate the supporting effect.In this paper,the following contents include:Firstly discuss the soil nailing support technology and its characteristics,Developing situation and application prospect of soil nailing supporting technology in the domestic and abroad.and points out the problems existed in the soil nailing support,such as the soil pressure in the Actual construction process,Whether The existing soil pressure calculation theory is suit for the actual situation or not,Then comparing various kinds of soil pressure calculation method and Determine an applicable calculation theory.Secondly Respectively for the the work mechanism and design theory between the prestressed anchor cable composite soil nailing wall support and the traditional soil nailing wall support.then make Analysis of the factors which affecting the stability of composite soil nailing wall support.Then take the calculation result into comparison and decide a suitable Calculation method.Then related to the actual engineering situation,Evaluating the effect on Prestressed anchor cable composite soil nailing support,Such as stress variation in the soil nail and the effect of prestressed anchor cable,Composite soil nailing wall of the change of horizontal and vertical displacement,and make comparison of the new soil pressure theory,traditional soil pressure theory and actual,combined with the result of numerical simulation to estimate the supporting effect of the prestressed anchor cable composite soil nailing support in deep foundation pit engineering.Finally,the author summarized the whole paper,indicated the main research results and pointed out the problems stay remained in the research and Put forward the prospect.