Study On Stability Of Deep Foundation Pit

The stability test of foundation pit is an extremely important content in the design of foundation pit engineering.The calculation of foundation pit stability is divided into the following calculation contents: the overall stability check,the anti-overturning stability check and the anti-uplift stability check.In the stability test of foundation pit,the standard method is simple and effective,but there are still some problems in practical application.For this reason,this paper analyzes and studies the existing problems in checking the stability of foundation pit,and puts forward some new suggestions.The main contents are as follows:(1)First of all,the theory of stability calculation of foundation pit is introduced,and the comparison of different regions is carried out to study the differences in the stability of deep foundation pit in different regions.(2)Through a simple example,the method of checking the stability of foundation pit is analyzed and studied.For the foundation pit of anchor support,it is considered that the method has the advantages that the soft soil embedding is too long in the stability test of foundation pit,Hard soil embedded too short problem;(3)Based on the analysis of the existing problems,the stability of the foundation pit is studied from the three aspects of the depth control condition,the safety factor and the displacement of the supporting structure.On the basis of the method of normative method,a safety factor and deformation control Determine the stability of the foundation pit check method;(4)For the concrete engineering examples,the stability of the foundation pit is compared and analyzed by the standard method and the new checking method respectively,and the rationality of the new foundation pit stability checking method is verified.