NONFRAME® Method

A disaster – prevention technology from Japan that stabilizes slopes and prevents landslides while protecting and preserving the natural environment and ecological system

Structure of NONFRAME® Method

Mechanism of NONFRAME® Method

IMPLEMENTATION RECORDS OF THE NONFRAME® METHOD IN THE PHILIPPINES

A. PRIVATE

1. Mahiao Steamlines Slope Protection Project

Client : Energy Development Corporation Leyte
Completion : April 2018
Location : Volcanic Ash Soil & Clay
Total Area : Approx. 1,042 sqm
Soil Nail Length : 2.50 meters

“NFM can also be installed in areas where previous installed structures exist, as seen in the Mahiao Steamlines Project. The NFM system was constructed along the slope where the steamlines powerplant runs through.”

2. Alviera Montala Terrace & Grotto Hill Slope Protection Project

Client : Nuevocentro Inc.
Completion of Delivery : March 2021
Location : Porac, Pampanga
Soil Condition : Sand and Clay
Total Area : 12,600 m²
Soil Nail Length : Varies from 2.50m up to 10.50 meters

“NFM system was implemented to protect a slope area of 12, 600 m2 inside a private development project. Due to the large scope of the project with varying soil conditions, the NFM system was designed with soil nail lengths ranging from 2.50m to 10.50m”

B. PUBLIC PROJECTS

1. ILOILO JICA Pilot Project (Section 1)

Client : DPWH Regional Office VI Iloilo
Completion : February 2019
Location : Brgy. Taytay Iabaras, Iloilo
Soil Condition : Soft Soil and Clay
Total Area : Approximately 775 m²
Soil Nail Length : 4.0 meters

“The NFM system is generally applied on slopes where vegation especially large trees are maintained and allowed to grow. The NFM system can be applied along the road, within residential areas and can be constructed with other slope protection countermeasures.”

2. DPWH REGION X KIPOLOT BUKIDNON (Sections A & B)

Client : DPWH Region X Bukidnon 2nd DEO
Completion : September 2020
Location : Palacapao Quezon, Bukidnon
Soil Condition : Weathered Rock (Mudstone & Silty Stone)
Total Area : Approx. 3,795 sqm (Section A & B)
Soil Nail Length : 3.00 meters

“The NFM system can be designed and installed on challenging slopes with uncommon topography. In a project done in 2020, the NFM system was laid out and installed on a convex slope, preserving the slope without the need to change the topography, minimizing the required earthworks.”

3. DPWH Region XIII Surigao – Lipata

Client : DPWH Region XIII Surigao Del Norte 2nd DEO
Completion : July 2021
Location : Surigao City, Surigao Del Norte
Soil Condition : Weathered Rock (Sandy Stone)
Total Area : Approximately 2,340 m²
Soil Nail Length : 2.50 meters

“The NFM system has also been installed on harder and steeper slopes like the Surigao Del Norte 2nd DEO project. NFM was installed on an 80° slope with a soil condition composed of weathered rock and sandy stone.”

Steel Slit Dam™

Steel Slit Dam™ allow harmless sediments to flow downstream under normal conditions while holding back damaging debris flows during deluges. They also contribute to maintain the riverbed level in downstream areas and mitigate riverbank errosion.

Usage

- Capture debris flow/driftwood ••• Open-type Steel Sabo dams

- Capture driftwood ••• Driftwood capturing works

Features

1) Permits normal sediments to pass under normal conditions, while capturing boulders and driftwood during damaging debris flows.

2) Helps to prevent riverbed degradation and riverbank errosion.

3) Eco-friendly as the natural flow of the river is maintained.

Types of Steel Slit Dam

Application Example in the Philippines

Application Example in Taiwan