In order to analysis force characteristics and changes of the anchor tension during the process of filling soil of the pull cantilever retaining wall, a model test is designed for research. The test mainly monitors basal earth pressure, lateral earth pressure of the retaining wall, anchor shaft force, lateral displacement of the retaining wall.
This article studied the wire rope net bottom connection system by an experiment which was researching on four class and seven different kinds materials. Then we get the experiment results by using different anchoring materials as anchoring end and studying the wire rope bottom connection system of tensile bearing capacity. Through the experiment and data analysis, we can draw conclusions that: Application in general situations, we can use M8 stereotypes retractor, but need to expand the curvature of the top ring, while using smooth design scheme to reduce stress concentration. Used in critical situations, we had better use special M14 bolt anchor, which has a higher bearing capacity and security. The presented methods in this paper are feasible and practical.
It is difficult to accurately identify dispersion curves of Rayleigh wave for the foundation with obstacles. Displacement curve of time-domain of half-space foundation have been obtained with the finite element in the paper. Then time-domain curve have been transformed Rayleigh wave dispersion curves. Rayleigh wave dispersion curves have been analysed in half-space foundation with water drain pipes. The results show that, there are reflection waves at the receiving signals in front of the obstacles, there are no reflection waves behind the obstacles basically. The location and spacing of the sensor have a greater impact on the results. The results provide the reference for the recognition of dispersion curves and disposition patterns of the sensors.
In order to understand the dynamic stress diffusion rule of the waste iron slag (sand soil) during dynamic consolidation, we conducted a large field test. The propagation and attenuation of dynamic stress in each ramming strike was recorded through the resistance strain gauge. It was shown that the dynamic stress caused by dynamic consolidation is pretty obvious. The dynamic stress dissipates extremely fast during the dynamic consolidation, the time is only 0.5s after plus the aftermath. The soil dynamic stress has heart-shaped distribution during the compaction. The dynamic stress value increases with the tamping hit number, but it keeps stable after about the third hits.
Dynamic consolidation has been widely used in many engineering fields. But in the use of discarded iron slag filled embankment, because the discarded iron slag is naturally piled up, multi-size particle mixture and backfilling height is relatively high, the effect of simple dynamic compaction is not obvious. This paper, combined with engineering examples, through the dynamic consolidation test, describes the experimental program, arrangement and spacing of tamping point, and matters need to be taken care in construction. It also explains the horizontal effects in consolidation by detection data analysis of waste iron slag roadbed. In this paper, we have established finite element numerical simulation analysis of dynamic consolidation by using FLAC3D. It is available in roadbed practical application and can be reference in similar projects of dynamic consolidation.
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