Stability Analysis of Trench Wall Strengthened by Diaphragm Wall Based on Displacement Standard
With the improvement of the requirements of the surrounding environment for the construction of underground engineering,it has become a key problem to build a stability evaluation method of the reinforced trench wall under settlement standard and realize the control of the surface settlement during the trench excavation.Based on the construction project of a rail transit diaphragm wall,the influence of the reinforcement of the trench wall on the ground settlement through the finite element method was analyzed,and the safety factor of the stability of the trench wall of the diaphragm wall with different settlement standards based on the parameter reduction method was studied.The influence of different reinforcement conditions on the deformation stability of the trench wall was examined.And then an evaluation method of the stability of the trench wall of the reinforcement of the diaphragm wall under settlement standard was proposed.The research results show that the reinforcement of the trench wall can effectively realize the settlement control of the ground surface.Based on settlement standard,the stability safety factor can be used to realize the quantitative analysis of the trench wall reinforcement.The stricter the settlement standard is,the deeper trench wall reinforcement depth is required under the same safety factor.Reasonable selection of trench width and reinforcement depth is the key to control the stability and deformation effectively.The larger the trench width is,the greater the reinforcement effect is on the deformation of trench wall.In addition,the quantitative relationship between the safety improvement coefficient and the reinforcement depth of the trench wall was also given.
displacement standardtrench reinforcementsafety factordeformation control
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