It is a trend to adopt slope techniques that fulfill the requirements of environmental, ecological and landscape considerations, because it has the benefits of economy, resource integration, and esthetics. This paper discusses biotechnical stabilization and soil bioengineering slope protection methods, and design considerations of slope protection for environmental, ecological and landscape requirements. Also, five case studies are presented, including the GEOFIBER method, dynamic properties of waste tire and sand mixtures, numerical simulation of whole tire retaining walls, coir planting for erosion protection, brushlayers method, and vetiver planting. There are many slope protection methods that fulfill the requirements. If they can be flexibly designed to use their special functions, an optimized design will prevail. The value and quality of slopes will be increased. At the same time, the concept of “green construction” will be set in.
I-70 Glenwood Canyon, a wandering scenic highway along the roaring Colorado River, is the last link of the interstate highway system in the U S A. To reduce environmental impact due to highway development, the Colorado Dept. of Transportation (CDOT) has taken a series of action to alleviate damages of environment, landscape and ecology of the beautiful canyon.
The technology used in I-70 Glenwood Canyon project included：terraced viaducts, pecast segmental bridges, hidden-head anchors,rockfall protection system, naturalized rest areas, artificially intelligent tunnel, extended tunnel portals, ecological crossing for animals, rock fa?ade painting, etc.
KEY WORDS：I-70 glenwood canyon, scenic highway, terraced viaducts, reinforced soil structures, conformity of geotechnogy with environment and landscape.
After the Chi-Chi earthquake occurred in 1999, it was found that a large amount of landslide is exposed with bareness in the hill-slope area of central part of Taiwan. According to the investigation, the area of earthquake-induced landslides may reach 11,297 hectare. Some of them have been restored by invaded vegetation naturally, and some remain exposed barely. Concerning the landslides first priority treated by man-made vegetation, it can be seen that the vegetation engineering method is effective in landslides stabilization in the initial stage. Based on the collected data, this study investigates the constructions of commonly used vegetation engineering method in slope stabilization such as netting and hydro-seeding, staking and wattleing, and vegetation in concrete cribbing. In further, associated with the relevant field exploration, the difference of various vegetation engineering methods were also discussed. Finally, it is also expected that this research can provide the designer and contractor as a guideline reference in the similar design of engineering practice.
The accurate performance of soil and water disaster prevention is the key step for a successful highway project. Because the natural environments are very difficult in Taiwan, and the human influences are adverse in soil and water protection, therefore, disasters often occur with highway developments. The purposes of soil and water protection are not only for the preservation of soil and water resources. It should also promote the development appreciation.
This paper discusses the importance of soil and water disaster prevention procedures for highway sustainable development; describes its concepts and principles; and conceptually suggests how to promote the preservations of soil and water associate with highway construction.
Reinforced soil retaining structures have become one of the most popular retaining systems in the past few years. Advantages of reinforced soil retaining structures include better seismic resistance, low construction cost, and better landscaping functions. As popular as landscaping issues and green structures have been prompted in construction industry, the reinforced soil retaining structures is recognized as one of the best replacement of the less attractive conventional retaining structures. In this paper, the author not only presents the major landscaping functions and applications of reinforced soil retaining structures, but also important design issues for the complicated reinforced soil retaining systems.
Streambed stabilization is the fundamental technique for stream corridor restoration. Sustainable techniques play one of the pivot principles in ecological restoration. The figure of entropy from the second law of thermodynamics is fitted as the index of sustainable techniques. The construction of flint packs, which is an orderly hard rock rearrangement technique and originated maybe several hundred years ago, deserves to be popularized on stream corridor ecological restoration that it matched the sustainable value for low entropy increment. Because of passing away of most skillful technicians, the ancient skills of flint pack are swiftly losing. It is presented in this report that basic components, structures, arrangements, voids and stability of flint pack are introduced, as well as practical stream layouts, by personal interviewing and reference citing. May this traditional and ecological technique be revived and spread out in this generation through modern technical terms.
The functions of road retaining structures include securing driving, conserving soil and water, modifying landscape, and conserving environmental ecology of roads. To develop a road should carefully planning and design the form of retaining structures from the perspectives of environmental protection, landscape, and traffic safety. This article interpreted the landscaping effect of retaining structures and the design principles of cutoff and fills of slope. Five types of slope protection structures include concrete, precasted concrete, rock, gabion, and green revetment were introduced. Ten special construction details were also provided to design revetments that will be more suitable and promote the quality of landscape.
From the aesthetic and creative points of view, the molding form is a brand new thought applied to existing concrete constructions. We can choose the molding form to match the environment on new or existing RC walls. By using this method, the wall has to add 10 or more centimeters concrete facing with steel wire on it. This article introduces how molding form is applied to RC walls, the costs and characteristics of ingredients, where it can be applied to and the key points of practical applications. It also provide information on function, aesthetic consideration and construction details of molding forms the function but also aesthetic in constructions.