Abstract:For the soft soil foundation with poor physical properties,the upper retaining wall often faces the problems of anti-sliding and insufficient bearing capacity of the foundation.Traditional prefabricated pile and cast-in-place pile schemes often face problems such as the safety of buildings around the project,residents’ noise complaints and environmental pressure from the discharge of drilling mud.Moreover,the construction period and cost requirements are high and cannot be guaranteed.In view of the above problems,the anti-slide of retaining wall and the bearing capacity of foundation are analyzed respectively.The geogrid in the reinforced soil can bear all or part of the horizontal force of the soil and the strength composite piles can improve the bearing capacity of the foundation.In the design of retaining wall on soft soil foundation,a new idea of combined protection of geogrid and strength composite piles is put forward and a relatively complete design calculation and analysis is carried out.The results show that the combination of the two can not only meet the anti-sliding stability of the retaining wall but also ensure the bearing capacity of the foundation.The combined scheme of geogrid and strength composite piles is convenient for construction and can save engineering investment.The research results have reference significance for the design and construction of retaining wall on soft soil foundation.
