The modeling of the «diaphragm wall» with the anchor without the use of distribution beams

Vladimir Znamenskiy,Evgeniy Morozov,Dmitrii Pekin,Dmitry Chunyuk,A Volkov,A Pustovgar,T Sultanov,A Adamtsevich

doi:10.1051/e3sconf/20199704021

Vladimir Znamenskiy, Evgeniy Morozov + Show 6 more

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https://doi.org/10.1051/e3sconf/20199704021

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Abstract

The article describes the features of modeling monolithic trench “diaphragm wall” with ground anchors without the use of distribution beams on the progressive collapse caused by the failure of one of the anchors. In the simulation of the above calculation case, in the flat formulation commonly used in practice, it is assumed that the “diaphragm wall” is a continuous structure in the longitudinal direction, without taking into account the presence of vertical joints formed between the grippers when concreting the fence and the lack of connection between the longitudinal reinforcement of adjacent reinforcement spatial frameworks. The performed calculations show that the failure to take into account these circumstances leads to a significant reassessment of the ability of the “diaphragm wall” to redistribute the load from the broken anchor to the neighboring anchor and can lead to an incorrect assessment of the results of the calculation for a progressive collapse. The need to take into account the reduction of structural rigidity of the “diaphragm wall” due to the formation of cracks in two directions is also shown.

Highlights

IntroductionThe practice of calculating the structure of the fence of ditch in various software complexes shows that at modeling of their work not count a number of an important features, underestimation of which can lead to destruction of separate elements of the structure of the fence of ditch, and to cause the phenomenon of progressive collapse (loss of stability of its separate sites or system as a whole)
The practice of calculating the structure of the fence of ditch in various software complexes shows that at modeling of their work not count a number of an important features, underestimation of which can lead to destruction of separate elements of the structure of the fence of ditch, and to cause the phenomenon of progressive collapse.Such a calculated situation was considered in the design of the fence of ditch in Moscow
The stability of the "diaphragm wall" during the development of the ditch was ensured by its penetration into the ground below the bottom of the ditch at 5.95 m and the device of 3 tiers of temporary pre-stressed injection ground anchorage installed in 1.5 m steps

Summary

Introduction

The practice of calculating the structure of the fence of ditch in various software complexes shows that at modeling of their work not count a number of an important features, underestimation of which can lead to destruction of separate elements of the structure of the fence of ditch, and to cause the phenomenon of progressive collapse (loss of stability of its separate sites or system as a whole). Such a calculated situation was considered in the design of the fence of ditch in Moscow. The "diaphragm wall" was arranged on the site, in the geological structure of which modern soil formations, modern man-made deposits, Upper Quaternary cover deposits, Middle Quaternary fluvio-glacial deposits of the Moscow horizon, medium Quaternary sea deposits of the Moscow and the Don horizon took part

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