Lying Soft Soil Foundation. Miscellaneous Fill The Effect Of Dynamic Compaction And Quality Testing

Dynamic Compaction (DC) as a cost-effective approach has been widely recognized and applied in the engineering.Using DC to reinforce Foundation can further improve soil strength and uniformity,reduce compression,eliminate uneven settlement,improve the physical and mechanical properties of engineering characteristics with obvious results. At the same time,the design of DC is highly empirical and qualitative because of the complicated parameter of the soil itself;DC of underlying soft soil reinforced fill soil of the problem has not been resolved;compacted to the thickness of large genes,the reinforcement effect of detection is still the hot issue of the current study.Based on a comprehensive analysis and synthesis of DC study of dynamics at home and abroad,by Lixia District,Jinan City,Jing Mountain Villa Old Village construction project of transformation of dynamic compaction effect of dynamic consolidation in-depth analysis,it is from theoretical and practical aspects which the paper carries out the work as followed by:1,Miscellaneous filling in soft soil foundation's DC mechanism is more complicated, the upper part of miscellaneous filling of the hammer beat at the end of the passive layer close, tamping soil between the hammer is dynamic compacted, lying under the soft soil are dynamic compacted,dynamic consolided and power replaced.2,DC reinforces the large thickness of foundation, Load Plate Test(LPT) as a proven and reliable method its influence depth is limited, reinforcement quality of the deep soil's evaluation, must also use other auxiliary methods for testing. Standard Penetration Test(SPT) can be detected in deep, but the miscellaneous filling's composition are complex, SPT is often difficult to penetrate the area of blocks of stone and fibrous material,that affect the detection of cost, efficiency and accuracy. Therefore, we recommended the auxiliary wave velocity test method to detect the similar foundations.3,Adopting the "small hammer's diameter,deep-ram hole" design and construction's principles, DC tamping will be able to pass into deep, make it difficult for the next reinforcement lying weak and soft silty clay layer of loess have been effectively reinforced.