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Ashish Kumar,

Sr. Manager (Technical)

Geo Environmental Solutions

Numerical analysis is based on computer simulations to model rockfall dynamics, assess terrain, and optimize protective structure design. It aids in risk assessment and supports decision-making for effective protection measures.

Geo Environmental Solutions (GES) is a specialised company in the Geotechnical and Environmental sector. We are equipped with the latest technologies and expert engineers to tackle the unlike situations in an efficient and smart way. Geo Environmental Solutions strategy is to provide solutions for geotechnical issues while protecting the environment. Our first objective is to plan the impact of each of our projects on the environment. The Company provides the solutions ranging from project initiation and feasibility, planning, environment and sustainability management, privatization and project advisory, detailed design tendering, project management and construction supervision, commissioning and finally to operation and maintenance.

CHALLENGES

To determine the Global Slope Stability of the slope with dynamic load caused by the train movement at the private siding in Hissaburu (Barbil) served by Barajamda Station. The section falls under South Eastern Railway Zone. The stretch lies along the trackside in between Barajamda Railway Station to Barbil Railway Station in Jharkhand, India.

SITE DISCRIPTION

Google Earth imagery of the site (22°9'15"N 85°24'14.4"E)

Top Surface of Slope

Boulders of size > 1m3

• The Site is located between Pole No. 389/27 to 389/29.

• The geology of the site consists of Banded Iron formation with Precambrian greenstone belts.

• Strata at site contains soil/rock mixture with vegetation cover.

• The slope section majorly consists of broken rock mass overlain by Soil and Boulder.

• For the analysis Rock Mass has been considered in bottom layer and soil in upper layer of approximately 2m.

ANALYSIS

• After interpreting the site data and geological parameters, and then Numerical Analysis was carried out to analyse the stability condition.

• According to a geological study, the Geological Strength Index (GSI) at the site varies from 10 to 30.

• A 25T DFC load was taken into account during the study.

• The dynamic load due to movement of train was calculated based on the guidelines of RDSO/2018/GE: IRS-0004 (D).

RESULTS

Static Stability Analysis Result

The stability analysis result for both the cross-section yielded a critical SRF of 3.69 and 4.28 which is more than the considered safe critical SRF of 1.5. Hence, Slope is considered to be safe

CONCLUSION

The stability investigation was carried out by Geo Environmental Solutions on two typical crosssections along the stretch. Based on the findings from the Numerical Analysis, the slope in the considered area is found to be stable. However, to avoid gully erosion and surface erosion risks, it is recommended to regularly clean and maintain the drain at the top to prevent excessive runoff from flowing over the slope.

For further information, Visit: www.geoes.in