Alternative Title

Paper No. 2.15

Location

St. Louis, Missouri

Session Start Date

3-8-1998

Session End Date

3-15-1998

Abstract

The paper presents the case history of two major landslides in Sikkim which had proved to be a source of continual trouble for many years since 1973, causing considerable recurring financial strain on the Border Roads Organisation in order to keep the communications through Highway cuttings in the Sikkim Himalaya are exposed to hazardous landslides of a bewildering variety. Geotechnical investigations have often revealed their complex and violent nature usually associated with high and steep cuttings in immature geological settings, severe river-erosion of toe slopes particularly due to flash floods, deforestation and faulty subsurface and surface drainage conditions during heavy rains. Most landslide cause road blockades thereby badly disrupting the communication system of the region. Some of the important highways, particularly without alternative routes therefore require heavy maintenance inputs. The paper gives an exclusive report on geological, geotechnical field and laboratory investigations of the two selected slides in Sikkim, India. The results of remedial measures suggested and implemented to protect the slope from sliding are discussed in the paper.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Fourth Conference

Publisher

University of Missouri--Rolla

Publication Date

3-8-1998

Document Version

Final Version

Rights

© 1998 University of Missouri--Rolla, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Major Landslides in Sikkim − Analysis, Correction and Protective Measures: A Case Study

St. Louis, Missouri

The paper presents the case history of two major landslides in Sikkim which had proved to be a source of continual trouble for many years since 1973, causing considerable recurring financial strain on the Border Roads Organisation in order to keep the communications through Highway cuttings in the Sikkim Himalaya are exposed to hazardous landslides of a bewildering variety. Geotechnical investigations have often revealed their complex and violent nature usually associated with high and steep cuttings in immature geological settings, severe river-erosion of toe slopes particularly due to flash floods, deforestation and faulty subsurface and surface drainage conditions during heavy rains. Most landslide cause road blockades thereby badly disrupting the communication system of the region. Some of the important highways, particularly without alternative routes therefore require heavy maintenance inputs. The paper gives an exclusive report on geological, geotechnical field and laboratory investigations of the two selected slides in Sikkim, India. The results of remedial measures suggested and implemented to protect the slope from sliding are discussed in the paper.