Field study on the treatment of sieve residual backfills using vibratory probe compaction method
To explore the viability of the vibratory probe compaction(VPC)method applied to sieve residual backfills,utilizing the Bai Niao Lake Hospital project in Urumqi,field experiments were conducted with VPC equipment developed independently.The reinforcement effectiveness was evaluated using in-situ testing methods such as compaction detection,dynamic penetration test,plate load test and surface wave test.The results show that the degree of compaction of the sieve residual backfills increases by 12.13％-48.08％after treatment.The number of blows in dynamic penetration tests within the treated layer rises with the increase of depth,averaging over double the level before treatment.After the treatment,the characteristic bearing capacity valuefak reaches 277 kPa,satisfying the design requirements.The average Rayleigh wave velocity of soil layer increases by al-most 29％,from 136 to 175 m/s.The VPC method can significantly improve the bearing capacity and homoge-neity of sieve residual backfills,providing a new idea for the treatment of sieve residual backfills.
万方数据
维普
