• Journal of the Korean GEO-environmental Society
• /
• v.6 no.2
• /
• pp.15-20
• /
• 2005

Moutain side ditch is constructed at the top of cutting slopes around road and it drains the surface water that flowed from upper part. About 70% of a country is composed of mountains so occurrence of cutting face by road general observation is necessary. Instability of cutting face is increased by permeation of underground water by rainfall the summer, pore water pressure increases. However, moutain side ditch is constructed on the top of cutting slopes has some troubles. For example, difficulty of qualify control and lack of drainage faculty. Therefore, stability variation of cutting slope is analyzed by hydraulic conductivity and construction depth of mountain side ditch and effective depth of mountain side ditch is decided in this paper.

• Journal of the Korean Society of Environmental Restoration Technology
• /
• v.11 no.4
• /
• pp.67-74
• /
• 2008

This study was carried out to select proper species for early stage replantation in cutting-slope area of the Baekdu Range roadside. In the cutting-slope area and upper forest area of the cutting-slope area, sample plots of 104 were selected and their vegetations and environmental factors were investigated. We found total 151 species in the 104 plots. The species of high frequency of Baekdu Range roadside were found in the order of Lespedeza bicolor, Festuca arundinacea, Eragrostis curvula, Pinus densiflora, Salix hulteni, Lespedeza cuneata, Erigeron annuus, Rubus crataegifolius, Spodiopogon sibiricus, etc. The dominancy of Festuca arundinacea, Eragrostis curvula, Lespedeza bicolor, Pinus densiflora, Salix hulteni, Spodiopogon sibiricus, Miscanthus sinensis, Lespedeza maximowiczii, Acer ginnala were 12.74%, 10.43%, 7.48%, 4.42%, 4.09%, 3.13%, 2.49%, 2.45%, 2.40% in the roadside cutting-slope, respectively. The importance value of Quercus mongolica, Lindera obtusiloba, Rhododendron mucronulatum, Lespedeza maximowiczii, Rhododendron schlippenbachii, Lespedeza bicolor, Quercus serrata, Rhus trichocarpa were 17.32%, 13.82%, 11.60%, 11.31%, 8.76%, 8.04%, 7.65%, 7.10% in shrub layer of the upper forest area, respectively. The species of Carex lanceolata, Spodiopogon sibiricus, Carex siderosticta, Miscanthus sinensis, Artemisia sp., Potentilla fragarioides var. major, Astilbe chinensis var. davidii, Chrysanthemum zawadskii var. latilobum, Aster scaber, Lysimachia clethroides, Patrinia villosa, Lindera obtusiloba, Rhododendron mucronulatum, Rhododendron schlippenbachii, Rhus trichocarpa, Stephanandra incisa, Zanthoxylum schinifolium, Lespedeza sp., Lespedeza cuneata, Amorpha fruticosa, Ligustrum obtusifolium, and Weigela subsessilis, may be more helpful in stabilizing of the cutting-slope area and making harmony with the surrounding forest area.

• Journal of Forest and Environmental Science
• /
• v.7 no.1
• /
• pp.35-41
• /
• 1990

This study was conducted to find out the suitable gradient and length of the slope from the landslide of banking slope and cutting slope caused by rainfall. The survey was carried out on forest road built in 1986. And the period of survey was from June, 1989 to August, 1989 after dividing the forest road into A and B. The survey plots consisted of the 12 banking slopes and 6 cutting slopes. The results obtained from the study were summarized as follows; 1. The rate of landslide appeared 75% in A forest road, 50% in B forest road, and then the average 67% in A and B forest road. But the value of landslide showed considerably low. 2. Because of landslide chiefly occuring on banking slope of $36^{\circ}{\sim}38^{\circ}$ and on cutting slope of $42^{\circ}{\sim}43^{\circ}$, it is suitable to decide the banking slope and cutting slope below each $36^{\circ}$ and $40^{\circ}$. 3. Landslide was the same on banking slopes through the length of slope. The best suitable length of slope is below 4m in cutting slope.

• Journal of the Korean Association of Geographic Information Studies
• /
• v.15 no.2
• /
• pp.1-11
• /
• 2012

Due to a heavy rain resulted from the global environmental change, collapse accidents happen annually and it is a tendency to increase the loss of life and economy. Thus, measures for the collapse of slope are required. If the slope can be simulated before cutting, the collapse can be predicted, and also the accident of the collapse can be minimized at the cost of recovery. This paper presents a simulation method of a slope which is important in cutting. The method is modeling and designing using Petri-Net and is implemented in the Windows XP using Arc GIS. Therefore, by means of cutting and reclamation based on GIS, this paper can contribute to saving a lot of time and money.

• Journal of Forest and Environmental Science
• /
• v.20 no.1
• /
• pp.93-109
• /
• 2004

To provide the basic informations related to forest road construction of mountainous terrain, we analyzed changes of the road structure factors such as banking and cutting slope gradients, slope length, road width by the environmental factors such as locations, slope gradients, soil types, road position on physically stabilized forest roads constructed in Gangwon-do. All factors related to the road structures by locations were significant except for banking slope length. Road width, longitudinal gradients, banking and cutting slope length by slope gradients were not significantly different and banking slope gradients in the range less than $30^{\circ}$, from $30^{\circ}$ to $35^{\circ}$ and more than $40^{\circ}$ and cutting slope gradients were significantly different for all areas. Road width, longitudinal gradients, banking slope length by soil types were not significantly different and others were significantly different. All factors related to the road structures by road position were significant except for cutting slope gradients.

• Proceedings of the Korean Geotechical Society Conference
• /
• 2008.10a
• /
• pp.992-1006
• /
• 2008

The tunnel type spillways is under construction to increasing water reservoir capacity in Dae-am dam. Cutting-slope adjacent to outlet of spillways had been originally designed to be 63 degrees and about 65m in height. Examination is carried out in preceding construction that it is caused to some problems possibility which of machine for slope cutting couldn't approach to the site, blasting for cutting slope might have negative influence on highway and roads nearby, and fine view along the Tae-hwa river would be eliminated. In order to establish stability of tunnel and more friendly natural environment that we are carry out detailed geological surface survey and analysis of slope stability. So, we are design and construct for tunnel excavation with possible method that it is keep up natural slope. The result of survey and analysis that natural slope was divided 3 zone(A, B, C zone). In A and B zone, in first removed floating rock, high tensile tension net is install that it prevent of release and falling of rock, in order to security during under working. In addition to, pre-stressed rock anchor is install purpose of security during tunnel excavation because of fault zone near vertical developed above excavation level. Zone C is relatively good condition of ground, design is only carry out random rock bolt. All zone are designed and constructed drainage hole for groundwater and surface water is easily drain. Desinged slpoe is harmony with near natural environment. Successfully, construction is completed.

• Journal of the Society of Disaster Information
• /
• v.3 no.2
• /
• pp.147-169
• /
• 2007

This study investigates the reinforcing effects of the Multi-bar Spring nails with respect to the conventional Soil-nails in artificial slopes. Based on wide experience related to design and construction, soil nails have been widely applied to reinforce slope in the world. Multi-bar spring nails are one of the improved soil nailing methods. These method maximizes bending, shearing, pull-out resistance for those multi-nails, not unit nail, that are inserted in the borehole using special spacer at regular intervals. In addition, because cutting plane is confined effect resulting from a pressured plate at the end of the nails with compression spring equipment, slope stability is secured using MS-nailing method. Analyzing bending, pull-out, shearing condition of MS-nail, it was examined throughly elastic region, load transfer capacity, reinforcing effect on cutting plate of MS-nails. In addition, Pilot and laboratory tests, numerical analysis were carried out to verify the superiority of MS-nailing method. In case, MS nailing method is applied to reinforce artificial slope, it was analyzed that bending, pull-out, shearing resistance was increased more than existing nailing method was applied. In this study, it was shown that surface failure was more or less prevented using MS-nailing method, confining effect on cutting plane using spring stuck to flexible equipment.

• Journal of the Korean Society of Environmental Restoration Technology
• /
• v.10 no.3
• /
• pp.52-59
• /
• 2007

This study was carried out to select proper species for early stage replantation in cutting-slope area of the Baekdu Range roadside. In the cutting-slope area and upper forest area of the cutting-slope area, sample plots of 46 were selected and their vegetations and environmental factors were investigated. We found total 90 species in the 46 plots. We found Festuca arundinacea in 27 plots of the 46 plots. We also found Lespedeza bicolor in 26 plots, Eragrostis curvula in 22 plots, Artemisia princeps var. orientalis in 19 plots, Erigeron annuus and Pinus densiflora in 15 plots, Lactuca indica var. laciniata in 14 plots, Miscanthus sinensis in 13 plots, Oenothera odorata, Commelina communis, and Humulus japonicus in 11 plots, Lespedeza cuneata in 10 plots, Salix koreensis and Salix hulteni in 9 plots, Festuca rubra, Youngia denticulata, Aster scaber, and Festuca arundinacea in 8 plots, Chenopodium album var. centrorubrum in 7 plots, Patrinia villosa and Erigeron canadensis in 6 plots, and Setaria viridis, Digitaria sanguinalis, and Dactylis glomerata in 5 plots.The dominancy of Festuca arundinacea, Eragrostis curvula, Lespedeza bicolor, Miscanthus sinensis, Pinus densiflora, Festuca arundinacea, Festuca rubra, Artemisia princeps var. orientalis, Erigeron annuus, Lespedeza cuneata, Dactylis glomerata, Salix koreensis, Alnus hirsuta, Pueraria thunbergiana, Medicago sativa, Lactuca indica var. laciniata, and Digitaria sanguinalis were 13.41% 11.87%, 4.88%, 4.56%, 3.38%, 2.29%, 2.14%, 2.14%, 1.99%, 1.95%, 1.54%, 1.47%, 1.44%, 1.37%, 1.15%, 1.13%, 1.07% in the roadside cutting-slope, respectively. The dominancy of Rhododendron mucronulatum, Lindera obtusiloba, Rhus trichocarpa, Quercus mongolica, Lespedeza bicolor, Rhododendron schlippenbachii, and Quercus serrata 22.15%, 13.36%, 13.14%, 12.03%, 11.74%, 11.20%, and 11.14% in shrub layer of the upper forest area, respectively. The species of Rhododendron mucronulatum, Lindera obtusiloba, Rhus trichocarpa, Rhododendron schlippenbachii, Zanthoxylum schinifolium, Weigela subsessilis, Stephanandra incisa, Rhamnus davurica, Ligustrum obtusifolium, Lindera erythrocarpa, Rosa multiflora, Rubus coreanus, Symplocos chinensis for. pilosa, Smilax china, Prunus sargentii, and Staphylea bumalda may be more helpful in stabilizing of the cutting-slope area and making harmony with the surrounding forest area.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.11 no.10
• /
• pp.1937-1943
• /
• 2007

Given the mountainous nature of Korea, cutting slopes are bound to happen. Every you, slope failures lead to enormous human and material losses. More recently, reckless development and subsequent degradation of forests has brought about soil erosion, which coupled with heavy rainfall, contaminates rivers, raises the level of river bottoms and thereby deteriorates their discharge capacity. In Korea, environmental impact assessments and disaster impact assessments have been conducted to come up with proper countermeasures. In order to perform quantitative analysis for this purpose, reliable slope information is quintessential. This study aims to obtain slope-related digital images using an RC model helicopter with a non-metric camera embedded, and to process these images to gain more accurate slope information. To this end, digital images obtained regarding cutting slopes were processed to gain numerical information of slopes and, on the basis of slope information gained here, reliable soil erosion factors were estimated.

• Proceedings of the Korean Geotechical Society Conference
• /
• 2004.03b
• /
• pp.614-621
• /
• 2004

Blasting is a technique for rock excavation: For instance, a rock cutting in a mountain side to prepare a base for a road. The blasting damage affect the rock slope stability. Therefore control blasting must be used. In this study, cutting cases of Sixty-nine rock blasts were investigated. Blasting damage patterns in rock slope and reinforcement methods are studied.