Mode of Slope Failure of Moderately to Completely Weathered Metasedimentary Rock at Bukit Panji, Chendering, Kuala Terengganu

Geology of Bukit Panji, Chendering, Kuala Teregganu consists of interbededmetasedimentary rocks (slate, phyllite and schists with minor quartzite) which haveexperience regional metamorphism. The age of this rock is Carboniferous. A development project which under construction in Bukit Panji, Kuala Terengganu hasenabled a landslide assessment to observe the modes of failure in moderately tocompletely weathered metasedimentary rock. Development on hillsides caused manyslope had to be cut to provide space for the infrastructure construction. From assessment analysis, a total of 21 cases of landslide failure occurred involving 17 cut slopes, and 4 cut-fill slopes. The most common type of failures is gully failures, with 9 cases represent 43% of all the observed slope failure. This was followed by 6 wedge failures, two planar and rock fall failures and one shallow sliding and toppling respectively. Cut slope failure involving moderate weathered rock mass (grade III) to the residual soil (grade VI). Relict structure was identified as the main factors controlling the failure, as well as water, natural slope-forming materials and the use of appropriate slope stabilization.

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Integrated Analysis Method for Stability Analysis and Maintenance of Cut-Slope in Urban

Slope Engineering ◽

10.5772/intechopen.94252 ◽

2021 ◽

Author(s):

Mincheol Park ◽

Heuisoo Han ◽

Yoonhwa Jin

Keyword(s):

Stability Analysis ◽

Slope Stability ◽

Slope Failure ◽

Slope Stability Analysis ◽

Velocity Curve ◽

Integrated Analysis ◽

Cut Slope ◽

Analysis Method ◽

Cut Slopes ◽

Inverse Velocity

In the process of constructing roads for the development of the city, cut-slopes are made by excavating mountains. However, these cut-slopes are degraded in strength by time-deterioration phenomenon, and progressive slope failure is caused. This study developed an integrated analysis method for stability analysis and maintenance of cut-slopes in urban. The slope stability analysis was performed using the finite element model, and the progressive slope failure by time-dependent deterioration was quantified by using the strength parameters of soil applying the strength reduction factor (SRF). The displacements until the slope failure by slope stability analysis were quantified by cumulative displacement curve, velocity curve, and inverse velocity curve and, applied to the slope maintenance method. The inverse-velocity curve applied to the prediction of the time of slope failure was regressed to the 1st linear equation in the brittle material and the 3rd polynomial equation in the ductile material. This is consistent with the proposed formula of Fukuzono and also shows similar behavior to the failure case in literature. In the future, integrated analysis method should be improved through additional research. And it should be applied to cut-slope to prevent disasters.

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The importance of designer-contractor communication in geotechnical design as exemplified by a cut slope failure

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/800/1/012004 ◽

2020 ◽

Vol 800 (1) ◽

pp. 012004

Author(s):

D Anafarta ◽

E Turk ◽

S O Akbas

Keyword(s):

Slope Failure ◽

Cut Slope ◽

Laboratory Studies ◽

Successful Performance ◽

Site Specific ◽

Construction Procedure ◽

Geotechnical Design ◽

Design Documents ◽

Cut Slopes

Abstract A shallow slope failure has occurred on the cut slopes of the Bigadic-Simav-Abide highway at the section located between Km:125+530-125+870, during construction. A detailed investigation of the landslide mechanism, which includes site specific surveys, laboratory studies, and stability analyses indicates that the main reason of the failure lies within the construction procedure details. This study focuses on the forensic geotechnical engineering procedures applied for determining the cause of the slope failure. An emphasis was placed on the importance of strictly following the construction sequence as illustrated in the design documents in detail, as well as on the indispensable role of continuous communication between the designer and the contractor for successful performance of geotechnical works.

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Stability of Cut Slopes Against Shallow Failure: Evaluation by Neural Network Model

Transportation Research Record Journal of the Transportation Research Board ◽

10.3141/1821-13 ◽

2003 ◽

Vol 1821 (1) ◽

pp. 104-114

Author(s):

Hiroyuki Matsuyama ◽

Kenji Ogata ◽

Kiyoyuki Amano

Keyword(s):

Neural Network ◽

Slope Failure ◽

Accurate Determination ◽

Rainfall Threshold ◽

Cut Slope ◽

Status Change ◽

Maximum Rainfall ◽

Additional Information ◽

Cut Slopes ◽

Time Of Failure

The discrimination model for road cut slope stability was used to assess 216 cut slope locations on the Chuo Expressway. This model ranks the failure probability of slopes by the rainfall threshold (cumulative precipitation that causes the slope to fail) to identify slopes highly prone to collapse. Because of the complexity (nonlinearity) of the relationship between the factors relating to the cut slope failure and the precipitation that triggers a failure, it has been difficult to correctly evaluate the likelihood of failure for cut slopes. The developed model has overcome that difficulty by involving the neural network as the discrimination technique. The input data included the different factors (topography, soil properties and geology, surface layer status, change in state) in the stability investigation table prepared at the time of road slope inspection, with additional information such as catchment topography. The cut slope data were prepared, referring to a variety of information encompassing the failure history for 30 years after the commencement of service, the rainfall record at the time of failure, the maximum rainfall amount ever recorded, and the data on the status of slope protection around the time of failure. As shown by the discrimination results, the model accuracy (ratio of correct answers to number of slopes evaluated) was as high as approximately 80%, which allowed accurate determination of the amounts of rainfall inducing the failure of different slopes.

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Slope stability in residual soils in Hong Kong

Canadian Geotechnical Journal ◽

10.1139/t82-058 ◽

1982 ◽

Vol 19 (4) ◽

pp. 521-525 ◽

Cited By ~ 1

Author(s):

D. J. Sweeney ◽

P. K. Robertson

Keyword(s):

Shear Strength ◽

Hong Kong ◽

Slope Failure ◽

Triaxial Tests ◽

Residual Soil ◽

Residual Soils ◽

Long Term Stability ◽

Granite Residual Soil ◽

Cut Slopes

A large number of steep, high cut slopes in residual soils exist in Hong Kong and many failures of such slopes have occurred, almost invariably during heavy rainfall. As a result, the long-term stability of many cut slopes is now in question.A brief review of past slope design and slope failure is presented.It has been found that the effective stress shear strength envelope of the Hong Kong soils is curved, particularly at low stress levels, and angles of friction are high. Shear strength results are presented from a series of multistage, consolidated drained, triaxial tests carried out on a typical decomposed Hong Kong granite residual soil. The results of the multistage tests are reviewed to assess the applicability of this type of test to residual soils.The importance of the curved shear strength envelope is discussed in relation to the observed slope failures.

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Fire Hazard Assessment During Construction of A Mixed-Use Development Project In Kuala Lumpur

International Journal of Engineering & Technology ◽

10.14419/ijet.v7i3.9.15262 ◽

2018 ◽

Vol 7 (3.9) ◽

pp. 5

Author(s):

Zaamuddin Zakaria ◽

Syuhaida Ismail ◽

Wan Nurul Mardiah Wan Mohd. Rani ◽

Rohayah Che Amat ◽

Mohammad Hussaini Wahab

Keyword(s):

Fire Hazard ◽

Development Project ◽

Hazard Identification ◽

Control Measures ◽

Primary Data ◽

Risk Level ◽

Kuala Lumpur ◽

Safety Control ◽

Mixed Use ◽

Under Construction

Construction by nature is inherently dangerous, with a high degree of hazard and risk. Serious fire has occurred in building under construction, which will not delay their completion dates and loss of life, but also result in serious monetary losses. The objectives of this paper are to investigate the causes of fire hazard during the construction phase; assess the risk level arising from the fire hazard during the construction phase; and tpropose safety control measures of fire hazard during the construction phase. Primary data is obtained from the respondents of a mixed use development project in Kuala Lumpur via questionnaire surveys. The data is analysed via Statistical Package for the Social Science (SPSS) and Hazard Identification, Risk Assessment and Risk Control (HIRARC). The findings show that the most important causes of fire hazard of a mixed-use development project are related to workers site activities. Meanwhile, HIRARC identifies that fire hazard from hot works and use electrical tools are the most important risks. Lastly, safety control measures were proposed to control the identified fire hazard by improving the operating procedure of hot works and use of electrical tools as well as implementing good housekeeping practices and inspection at the workplace.

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Field measurements and monitoring for prevention of the labour accident by the slope failure under construction

Japanese Geotechnical Journal ◽

10.3208/jgs.8.597 ◽

2013 ◽

Vol 8 (4) ◽

pp. 597-610

Author(s):

Kazuya ITOH ◽

Katsuo SASAHARA ◽

Hirofumi HAGA ◽

Shin-ichi TOSA ◽

Masahiro NAGUMO ◽

...

Keyword(s):

Slope Failure ◽

Field Measurements ◽

Under Construction

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Stability study of rock slope in fractured quartzite at right side of spillway, Middle Marsyangdi Hydroelectric Project, Nepal

Journal of Nepal Geological Society ◽

10.3126/jngs.v28i0.31724 ◽

2003 ◽

Vol 28 ◽

Author(s):

Kaustubh Mani Nepal ◽

Roger Olsson

Keyword(s):

Rock Slope ◽

Stability Study ◽

Cut Slope ◽

Stability Studies ◽

Hydroelectric Project ◽

The Stability ◽

The Right ◽

Cut Slopes

A 120 m long and 68 m high rock cut slope is designed at the right side of spillway of Middle Marsyangdi Hydroelectric Project. This paper describes the stability studies performed for the rock cut slopes in jointed quartzite for foundation of spillway.

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