• Journal of the Korean Geotechnical Society
• /
• v.21 no.6
• /
• pp.31-40
• /
• 2005

In this study, a newly modified soil nailing technology which uses bamboo, rich natural material growing in southern areas, is developed to prevent the soil pollution and to overcome the difficulty of excavation near existing structures. Experimental and analytical studies were performed to confirm application possibility of bamboo taking the place of existent reinforcement material, that is steelbar, FRP and etc. In experimental study, strength characteristics of bamboo material were analyzed, and pull-out resistance of bamboo soil nailing system by field pull-out tests was examined. In analytical study, limit equilibrium analysis and displacement analysis were performed, and application possibility of bamboo soil nailing system was analyzed. As the result of this study, bamboo has comparatively good strength and pull-out resistance characteristics. It is expected that bamboo can be used as satisfactory reinforcement material by selecting bamboo with reguired diameter and by controlling the number of bamboo strips. Bamboo is an alternative for the reinforcement of soil nailing system, especially temporary support system in excavation near the existing structures.

• Journal of Korean Association for Spatial Structures
• /
• v.6 no.2 s.20
• /
• pp.7-12
• /
• 2006

최근 환경문제에 대한 해결책으로 목조건물의 해체 및 목재의 재사용에 대한 관심이 높아지고 있다. 목조건물을 접합철물에 의해서 접합할 경우에는 건물의 해체시에 철재를 사용하지 않아 목부재의 절단이 매우 용이하고 목재의 재사용이 용이하도록 하는 장점을 가지고 있다. 대나무의 높은 인성은 목재 접합부의 강도와 안정성 확보를 가능하게 해주고 있다. 대나무 접합물은 2005년 일본 Aichi 세계박람회에서 Japan pavilion Nagakute 전시관 건물이 대나무 접합부를 사용한 목조건물이다.

• Journal of Conservation Science
• /
• v.37 no.5
• /
• pp.536-544
• /
• 2021

In the present study, safe management and value improvement of bamboo sunblind, which is an item of cultural heritage, were performed by adopting stable conservation treatment methods. The bamboo sunblind used in the present study was excavated from No. 1 catchment site in Baesanseongji, Busan. It was determined that the main material used to make the sunblind was bamboo, and herbal plants were used to weave the bamboo using lacquer as an adhesive agent. All contaminants and soil adhered to the sunblind was removed. Thereafter, the sunblind, which was recovered in the form of blocks, was washed separately after fixing it to a temporary plaster frame and to avoid the blocks from breaking during washing. Then, polyethylene glycol (PEG) impregnation was utilized for the reinforcement treatment. Based on the preliminary test results, the shape of the sunblind was fixed using a stainless-steel frame to prevent physical damage that may occur during the drying process. Thereafter, the bamboo sunblind was vacuum freeze-dried. PEG 20% (in ethyl alcohol) was applied as a surface treatment agent for stabilization the sunblind. After the surface treatment, the bamboo sunblind were joined together to fit the maximum width, and the rectangular shape of the sunblind was restored-as best as possible-while filling in the missing parts by maximizing the use of unknown members such as in the disturbed layers below bamboo sunblind surface. The conservation treatment was completed by fixing the bamboo sunblind into the fabricated frame.

• Journal of the Korean Geotechnical Society
• /
• v.22 no.8
• /
• pp.5-11
• /
• 2006

A series of large scale plate loading tests are performed to assess bearing capacity characteristic of dredged and reclaimed ground that is reinforced by bamboo net and geotextile as a surface strengthen method. Bearing capacity ratio is distributed from 3.46 to 6.03 for bamboo net and from 2.19 to 3.59 for Geotextile In case of bamboo net, BCR was obtained from 1.6 to 1.7 times than Geotextile. As the comparison of each bearing capacity from test and theory shows, bearing capacity theory for geotextile was not suited for bamboo net. The bearing capacity analysis reinforced by bamboo net shows a good relationship between sand mat thickness (H) / bamboo net space (S), and bearing capacity ratio (BCR).

• Journal of Korea Foresty Energy
• /
• v.21 no.3
• /
• pp.10-17
• /
• 2002

This study was carried out to investigate a heat treatment condition and suitable drying schedule of bamboo material(Phyllostachys nigra var. henonis) for a vertical flute with small-notched bamboo. It is very important to prevent drying defects during its drying process. We investigated the effort of heat treatment the most suitable drying schedule for small-notched bamboo vertical flute without drying defects in this research. A direct heat treatment method and drying conditions of 3($20^{\circ}C$ 65%, $40^{\circ}C$ 40%, and dry at air condition) were applied to the Bamboo specimen that felled in several areas for a month. The result suggested that the most suitable drying schedule with the less split and the shortest time was to dry at $40^{\circ}C$, 40% condition and it was useful to direct heat-treatment because of reducing the number and size of split during drying bamboo.

• 보존과학연구
• /
• s.35
• /
• pp.45-55
• /
• 2014

The small dining tables which are made of bamboo were deteriorated condition when those were excavated from Mado shipwreck No.1. Therefore, preliminary test was conducted for consolidation (Sucrose, Dammar gum, Cetyl alcohol and Polyethylene glycol 4000) then impregnated and vacuum freeze dried. After the test, since the treatment with vacuum freeze drying using an aqueous solution of PEG 4000 keep the shape well the most and present bright colour, waterlogged archaeological bamboo conserved with vacuum freeze drying using an aqueous solution of PEG 4000. One bamboo table consolidated with soluble PEG 4000 from 10% to 40%, then vacuum freeze dried. Another impregnated with soluble PEG 4000 from 10% to 70%. After that, it was separated and held in polycarbonate sheet for preventing bending during dry. The small dining tables are the three dimensional shapes and have some loss. Therefore the mounting for support tables were necessary which are made of acrylic sheet. It keep the table shape and make it convenient for storage and handling.

• Korean Journal of Fisheries and Aquatic Sciences
• /
• v.32 no.1
• /
• pp.1-4
• /
• 1999

A maldanid polychaete, Axiothella quadrimaculata Augener, 1914, is newly recorded in Korean fauna. Genus Axiothella is found for the first time in Korean waters. The specimen was collected in the Eisenia bicyclis bed by SCUBA diving. The species is described with figures and the key to genera was revised. Including this Axiothella quadrimaculata, a total of 18 species representing 13 genera are known to the Korean Maldanid polychaetes.

• Proceedings of the Korean Vacuum Society Conference
• /
• 2002.06a
• /
• pp.107-107
• /
• 2002

• Archives of design research
• /
• v.14 no.4
• /
• pp.117-126
• /
• 2001

A new functional meaning has been given as natural resource to bamboo through reanalysis. Bamboo products contributed to creating added-value of pro-environment. In this study, a potential efficiency and vision of bamboo products and crafts are presented. As bamboo plywood and bamboo decorating paper were developed followed by academic and technological support, an activation of markets has been pursued and bamboo pattern tiles for new furniture was developed. This study examined kinds and characteristics of bamboo and processing of raw material and how to express with the material. Through advanced technology, it identified traditional functions and technological mistakes and analysed domestic and overseas applications to enhance utility of plywood made of bamboo. Bamboo pattern tiles were developed for decorating of furniture doors based on bamboo pattern paper. For patterns, 'tortoise, cranes, and deer'meaning eternity and new millenium among Ten Korean Longevity Animals are simply and lively represented. Series of the sun and mountain use effects of bamboo pieces to present bright images and to maximize quality of bamboo. A pattern of '卍'incorporates mystery of the cosmos and meaning of temples together with traditional patched wrapping cloth, Arirang and Chilgyopannori for beautiful ornamentation. Bamboo decorating tiles are made through accumulation of technologies by a cooperation with industries of bamboo equipment and production of furniture in Damyang Bamboo Products Complex. Processing of raw materials is peformed with equipment of Damyang. Development of samples and production and delivery of bamboo goods are handled in Design Venture of Chosun University Chamber. Developed goods decorating doors of furniture are in sale by an order from furniture industries.

• Journal of the Korean GEO-environmental Society
• /
• v.13 no.6
• /
• pp.5-17
• /
• 2012

The study of surface ground reinforcing method is supposed to be considered preferentially is not satisfied and also doesn't contemplate plastic flow because of repetitive drive of construction equipment. Also, Terzaghi's bearing-capacity equation and Yamanouchi's suggestion have been used to design the surface reinforcement, but most engineers depend on their experience and cases constructed before because of dispersed variables and inappropriate bearing-capacity factors. Hence, plate load test and repetitive plate load test were performed in the field which is reinforced with geotextile, Geogrid whose tensile strength are 200kN/m, 100kN/m and bamboo($0.4m{\times}0.4m$). The object of this study is to evaluate bearing capacity and behaviour of surface ground and to compare each reinforcement form test results. From the results bearing capacity ratio increased by a maximum of 1.5 times with bamboo reinforcement method comparing to others.