scholarly journals Geoysynthetic Reinforced Embankment Slopes

2020 ◽  
Author(s):  
Akshay Kumar Jha ◽  
Madhav Madhira

Slope failures lead to loss of life and damage to property. Slope instability of natural slope depends on natural and manmade factors such as excessive rainfall, earthquakes, deforestation, unplanned construction activity, etc. Manmade slopes are formed for embankments and cuttings. Steepening of slopes for construction of rail/road embankments or for widening of existing roads is a necessity for development. Use of geosynthetics for steep slope construction considering design and environmental aspects could be a viable alternative to these issues. Methods developed for unreinforced slopes have been extended to analyze geosynthetic reinforced slopes accounting for the presence of reinforcement. Designing geosynthetic reinforced slope with minimum length of geosynthetics leads to economy. This chapter presents review of literature and design methodologies available for reinforced slopes with granular and marginal backfills. Optimization of reinforcement length from face end of the slope and slope - reinforcement interactions are also presented.

2012 ◽  
Vol 190-191 ◽  
pp. 1227-1233
Author(s):  
Qi Xia Liu ◽  
Liang Fan

This article selected a typical loess slope engineering as the research object, and through the characteristics of loess landslide, landslide environmental geological conditions, the formation mechanism of the landslide study of the loess area of urban slope instability factors, loess slope stability of the calculation method and reinforcement measures, the loess slope stability study area has a large reference.


2019 ◽  
Vol 12 (1) ◽  
pp. 73-91
Author(s):  
Yoszi Mingsi Anaperta ◽  
Septian Andika Putra

Tui Hill is a limestone hill lined south of Padang Panjang. It is located between Rao-Rao Village and Tanah Hitam. Based on the results of investigations of researchers on the slopes of Bukit Tui limestone in the coordinates S0 ° 28'21.3 "E100 ° 24'00.4ʺ which are in the Tanah Hitam Village, there are many weak fields such as burly, steep slope geometry, influence on earthquake vibrations, and rainfall the high can lead to landslides on slopes, potential for landslides on the slopes of research can endanger road users and community settlements on slope locations. This study aims to analyze the potential of landslides based on the physical and mechanical properties of intact rocks, using the boundary equilibrium method. Then make reinforcement recommendations so that slope conditions are safe / stable. Based on the results of analysis and calculations in saturated conditions with the influence of earthquake factors 0,7 - 0,9g the values ​​of FK 1,461, 1,295, and 1,144 were obtained. From the results of the analysis, the slope is unsafe / unstable. In the original condition with 0.9g earthquake factor, FK 1.364 is obtained. Based on the results of analysis and calculations, the slope reinforcement recommendation used is the wire mesh installation method (wiremesh) in slope face.


Author(s):  
Ш.Г. Идармачев ◽  
В.И. Черкашин ◽  
И.Ш. Идармачев

Предгорная и горная часть территории Дагестана подвержена опасным геологическим процессам, в том числе и обвалам, что представляет определенную угрозу в местах проживания населения и соответствующей инфраструктуре (дороги, линии электропередач, газопроводы и д.р.). Вопрос контроля за опасными участками является очень важным и необходимым, поскольку управлять обвалами больших размеров человек не может, а вмешательство в естественный ход его развития представляется весьма проблематичным. Для минимизации ущерба необходим прогноз, с максимально допустимой точностью определяющий состояние предполагаемого обвала и зоной возможного поражения. Цель работы заключается в разработке новых подходов, используя геофизические наблюдения, направленные на познание исходной генетической сущности обвальных массивов, и на основе изучения полученных результатов выработать надёжные способы прогнозирования катастрофических событий. Метод исследований. Сейсмические датчики могут регистрировать колебания не только земной поверхности, но и отслеживать характерные особенности, связанные с состоянием отдельных массивов. На скорость распространения сейсмических волн влияет ряд факторов, таких как температура породы, влажность, механические напряжения и многие другие параметры. По изменениям сейсмических параметров горной породы можно отслеживать неустойчивое состояние скального массива, определить признаки, характерные для ускорения обвального процесса, накопления и снятия упругих напряжений в массиве, указывающих на растрескивание горных пород. Эти данные предоставляют важную информацию о развитии нестабильности крутых склонов в сторону катастрофического разрушения. Результаты работы. Впервые на Кавказе исследованы кинематические параметры потенциально обвального скального массива, находящегося в условиях неустойчивого равновесия на крутом склоне, представляющего опасность обрушения на районный центр Гуниб в Дагестане. Определены количественные и качественные характеристики от различных внешних динамических воздействий, микросейсмов, вызванных штормовыми циклонами в океане, землетрясениями. В рамках поставленной задачи были определены собственные частоты и амплитуды колебаний скального массива, а также его реакция на колебания удаленного сейсмического события. The foothill and mountainous part of the territory of Dagestan is subject to dangerous geological processes, including collapses, which poses a certain threat in the places of residence of the population and the corresponding infrastructure (roads, power lines, gas pipelines, etc.). The issue of control over hazardous areas is very important and necessary, since a person cannot manage large landslides, and interference in the natural course of its development seems to be very problematic. To minimize damage, a forecast is required that determines, with maximum permissible accuracy, the state of the expected collapse and the zone of possible damage. The aim of the work is to develop new approaches, using geophysical observations aimed at understanding the initial genetic essence of landslides, and, based on the results obtained, to develop reliable methods for predicting catastrophic events. Methods.Seismic sensors can register vibrations not only of the earth's surface, but also track the characteristic features associated with the state of individual massifs. The speed of propagation of seismic waves is influenced by a number of factors, such as rock temperature, moisture, mechanical stress and many other parameters. By changes in the seismic parameters of the rock, it is possible to track the unstable state of the rock mass, to determine the signs characteristic of the acceleration of the landslide process, the accumulation and removal of elastic stresses in the mass, indicating rock cracking. These data provide important information about the evolution of steep slope instability towards catastrophic failure. Results.For the first time in the Caucasus, the kinematic parameters of a landslide rock mass, which is in unstable equilibrium on a steep slope, posing a danger of collapse on the regional center Gunib in Dagestan, have been investigated. The quantitative and qualitative characteristics of various external dynamic influences, microseisms caused by storm cyclones in the ocean, earthquakes have been determined. Within the framework of the task, the natural frequencies and amplitudes of the rock mass vibration were determined, as well as its response to the fluctuations of a distant seismic event


2003 ◽  
Vol 15 (3) ◽  
pp. 349-355 ◽  
Author(s):  
Takahiro Doi ◽  
◽  
Hideyuki Tsukagoshi ◽  
Shigeo Hirose

Construction work on steep slopes is difficult and dangerous, but it is also difficult to automate work at such type sites. One reason is that construction sometimes calls for movement across a ""Free Frame"" - a structure built to keep a slope from collapsing - and because of the ups and downs of the natural slope, it is difficult to design a purposeful simple mechanism to move on this frame. We propose a sensor-based quadruped walking robot that moves on the slope without damage to the surface of the frame, and developed a TITAN VII prototype robot. We detail the techniques required by this type robot to move and work on steep slopes. Practical ways of A) detecting positions and orientations of frame surfaces on rough slopes and B) stepping over the frame and maintaining the stability of the robot using positioning, are presented and their effectiveness is verified through experiments.


Sign in / Sign up

Export Citation Format

Share Document