Foundation treatment and foundation design in karst areas
The common treatment methods for the foundation base in karst areas were expounded.In the areas with strong development of karst(soil)caves and saturated sand layers overlying the karst,when the use of pile foundations is limited,the box foundation design scheme with better integrity can be adopted to reduce the additional stress of foundation soil and foundation settlement.The application of sleeve valve pipe grouting in projects was introduced.According to the distribution depth,height and planar position of karst(soil)caves,only some karst(soil)caves were detected through drilling to explore the boundaries of karst(soil)caves,and grouting sealing treatment was adopted to save the project cost.In the area with large loads of the superstructure,grouting with full grouting holes were used to reinforce the foundation to improve the bearing capacity of the foundation.The foundation settlements before and after foundation reinforcement were calculated and compared.Finally,the core drilling method was used to sample and test the treated foundation,and the test scheme after grouting treatment was introduced to ensure that the treated foundation achieves the engineering effect.The results show that the reinforcement effect is good.
karst areafoundation designground treatmentgrouting methodbox foundation
万方数据
维普
