This article introduced the principle of high speed hydraulic compactor application in the backfill of bridge platform and its advantages. At the same time, the example is analyzed with the high speed hydraulic compactor treated the soil, which is backfilled in the bridge platform. The result shows that the high speed hydraulic compactor can effectively reinforce the bridge platform soil backfilled, which can reduce the settlement and the bridge platform jump after opening to traffic.
As a convenient and rapid nondestructive testing method, transient Rayleigh wave has an increasingly wide range of applications in engineering, and the testing result is increasingly accepted in the engineering domain. With engineering examples, this article mainly analyzed the nondestructive testing principle and detected the data processing method. By analyzing the engineering example that using transient Rayleigh wave method to detect the effect of dynamic compaction about foundation, the conclusion that transient Rayleigh wave could conveniently and rapidly detect the effect of dynamic compaction about roadbed of the expressway was farther proved, which has certain provide engineering significance for the future engineering detection.
Pit foundation excavation leads both settlement and uneven settlement in the building foundation. It has settlement cracks in masonry and concrete structure; these damages lie on the basis of the instability in neighboring buildings. In this paper, by the use of FLAC3D, it establish three-dimensional numerical analysis mode of interaction between foundation pit excavation and raft foundation, the change patterns of the soil deformation, pore water pressure and the uneven settlements of raft foundation are analyzed. The results indicate that the maximum value of the raft foundation settlement appears on the maximum pit free surface on the foundation pit, and the lesser value of the raft foundation settlement is away from the foundation pit, these indicate that the laws of the uneven settlement.
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