
Bosai Solution ID : JBP00025

Landslide / Slope Failure Prevention Method
Landslide / Slope Failure Prevention Method which enables to preserve or recover vegetation
Hazard
Solution Purpose
Solution Theme
Technology Subject
Advantages
Solution Illustrated
Stabilize slope while preserving or recovering vegetation
NONFRAME® method is a kind of soil nailing which can stabilize slope while preserving or recovering vegetation.
In case of stabilizing natural slope, this method can construct without cutting trees.
This method can of course be applied as well as cutting or corrupsed slope. In this case, the slope is fully covered with vegetation after construction, since this method does not cover slope with concrete.
Background
Environmentally Friendly Slope Stabilization Method
As an alternate solution to the concrete spray "conventional" slope-disaster prevention method, this "NONFRAME® Method" had been developed in 1996 in response to the growing needs of landscape conservation and eco consciousness from the market. This method enables to preserve the trees without any trees felling, grading works or covering with a concrete structure, yet to realize stabilization of slope with its simplified structure.
Exposition of the Solution
With its excellent feature,
①no need to cut the trees that are native to the slopes
②possible to drastically reduce construction period and cost
③construction workable even under severe condition
This method becomes very popular in Japan with steady growth rate of construction results, contributing keeping construction site in harmony with the beautifully landscape, which has also induced a great deal of attention from abroad.
Achievements of Examples

Other References
Construction example in Bhutan
This is the project with regard to Hydroelectric Project dam site in Trongsa, Bhutan. In 2015, the slope failed due to torrential rainfall and five workers were killed, even though it was originally covered with shotcrete. Then, NONFRAME® method was installed on the corrupsed slope to stabilize the slope.
The construction area was total 5,400 sqm, however the construction finished only three months even severe condition, because NONFRAME® method is easy to construction even unskilled worker.
After construction, the slope has been stabilized by this method and has been covered with vegetation.
Corporate Profile
NIPPON STEEL METAL PRODUCTS CO.,LTD.
Akihabara UDX 13F, Sotokanda 4-14-1, Chiyoda-ku, Tokyo, Japan 101-0021
Tel. : +81-3-6625-6260
E-mail : skajins-kenzai.co.jp
Website : https://www.ns-kenzai.co.jp/english/index.html