Early implementation of the project to solidify Hoang Sa road

Hoang Sa Road, at the foot of the mountain, experienced landslides during the rainy season in October 2023. Photo: THANH LAN

Urgent need for investment

In fact, over the years, this section of road has frequently been subjected to harsh impacts from sea waves, storms, and landslides, posing a potential risk to traffic safety and disrupting traffic flow.

According to the Da Nang Investment and Construction Project Management Board for Transportation and Agriculture (the investor), the heavy rains in October 2022 and 2023 seriously affected the roads in the Son Tra peninsula area, especially on the Hoang Sa route, with many points experiencing landslides on both the positive and negative slopes, and some sections of the road surface fractured...

According to Mr. Nguyen Van Tu (a resident of Tho Quang ward), who frequently travels on this route, many sections of the road are narrow, winding, and steep, yet lack convex mirrors and warning signs. Meanwhile, the road frequently experiences rockfalls and landslides, posing a potential accident risk.

The road is frequently affected by landslides due to heavy rain. Photo: THANH LAN

Ms. Tran Thi Phuong (a resident living near the road) said that the road is often dark at night due to insufficient lighting, and coupled with the high speed of motorbikes, it poses many risks. She believes that installing additional lighting and warning signs is necessary.

Ms. Nguyen Thi Tuyen (an employee at the InterContinental Da Nang resort) said: “The fact that monkeys and some other forest animals often suddenly cross the road also increases the risk of accidents. Many times I have seen tourists brake suddenly to avoid monkeys, luckily they didn't fall off their motorbikes.”

According to the Department of Construction, reinforcing Hoang Sa road is an urgent requirement to ensure traffic safety and protect people's lives. With the rainy and stormy season approaching, many sections of the road are directly hit by waves, damaging the road surface and causing serious erosion. Without solutions such as reinforcing the road with breakwaters and slope protection, the risk of road collapse and accidents is very high.

Multiple construction solutions

Son Tra Peninsula is the "green lung" of Da Nang and a famous ecotourism destination attracting millions of visitors every year. Hoang Sa Road is a vital route connecting tourists to the peninsula, linking points such as Linh Ung Pagoda, But Beach, Da Den Beach, and the thousand-year-old banyan tree. Strengthening this road not only ensures stable tourism operations but also provides a foundation for developing additional services, contributing to enhancing the economic value of the island and coastal areas.

The road surface was covered with debris due to a landslide. Photo: THANH LÂN

According to Decision 1152/QD-UBND of the City People's Committee, regarding the scale of investment and construction, measures will be implemented to protect the safety of the project and limit rockfalls, landslides, and damage to the road surface on Hoang Sa road at 33 locations as per the approved investment plan.

At the same time, due to the complex topography and geology of the area, and the heterogeneous geophysical structure, it is necessary to immediately implement measures to ensure the safety of the construction, limit rockfalls and landslides (both positive and negative slopes), and study long-term, sustainable solutions for the road in accordance with the investment plan approved by the Da Nang City People's Committee.

Regarding structural scale and technical solutions: For group-based design solutions, the following design solutions will address damaged areas, landslides on both positive and negative slopes, and rockfalls along the road:

Solution group 1 - addressing slope erosion due to steep terrain; reinforcement using anchored retaining walls, soil nails combined with reinforced concrete frames, combined with surface treatment solutions, underground drainage systems and surface drainage systems.

Solution Group 2 - addressing rockfall locations; combining an active rockfall protection system using steel mesh to protect rock slopes in a suspended or anchored manner with rock spikes or anchors, and a passive rockfall protection system using high-strength rockfall and rolling barrier fences.

Solution Group 3 - addressing rockfalls and slope slippage; solutions include soil cutting, slope load reduction, stepped slope excavation; and combined vertical reinforcement with 100x100 V-shaped steel piles.

Solution Group 4 - addressing mudflow and rockfalls; reinforcement with open dam-type retaining walls, underground drainage systems, and surface drainage systems.

Solution Group 5 - Repairing damaged drainage systems; repairing drainage systems, drainage ditches, and drainage pipes.

And solution group 6 - cleaning and sanitizing the slope surface.

Source: https://baodanang.vn/som-trien-khai-du-an-kien-co-hoa-duong-hoang-sa-khu-vuc-ban-dao-son-tra-3301152.html