Construction of Bored Pile Foundations for the Liem Son Interchange Overpass and National Highway 21A

Project: Construction of Bored Pile Foundations for the Liem Son Interchange Overpass – Km7+710.89 and the Grade-Separated Crossing between National Highway 21A and the Railway – Km16+894.83

Quantity: 112 bored piles, diameter D1200mm

The investment in constructing the connecting route from National Highway 1A to the Cau Gie – Ninh Binh Expressway via the Liem Son interchange, passing through Binh Luc District and intersecting with National Highway 2A, National Highway 21B, and the connector road between the Hanoi–Hai Phong and Hanoi–Ninh Binh expressways, plays a strategic role in regional transportation development. The project also enhances connectivity between two national special heritage sites: Tran Thuong Temple (Ha Nam Province) and the Tran Temple Historical and Cultural Complex (Nam Dinh Province).

Upon completion, the project will significantly improve travel convenience for local residents, reduce traffic congestion, and minimize traffic safety risks during peak hours. At the same time, it will contribute to maintaining public security and order in the area, creating a solid foundation for the socio-economic development of Ha Nam Province in the coming years.

Hanoi Vietnam Co., Ltd. is one of the leading foundation construction contractors in Vietnam. With a team of highly qualified engineers and many years of experience in bored pile construction both on land and over water, we are confident in delivering high-quality, safe, and efficient foundation solutions for major infrastructure projects.

Geotechnical Conditions of the Liem Son Overpass – Ha Nam

Fill layer (Đ): Fill soil distributed at the surface, thickness from 1.6 m to 5.0 m. The fill contains impurities with non-uniform compaction. N30 = 10–15.

Layer 1b: Low plasticity clay, yellowish-brown to grayish-brown, stiff plastic state. Thickness approximately 6.0 m. R0 = 1.2 kg/cm². N30 = 4–5.

Layer 2: Low plasticity clay, brownish-gray, very soft to flowing plastic state (CL). Thickness from 4.9 m to 10.5 m. R0 = 0.76 kg/cm². N30 = 2–8.

Layer 3a: Sand mixed with clay and silt, dark brownish-gray, loose structure, saturated (SC–SM). Thickness from 2.0 m to 5.6 m. R0 = 1.0 kg/cm². N30 = 6–15.

Layer TK3: Low plasticity clay, dark brownish-gray, flowing plastic state (CL). Thickness approximately 1.4 m. R0 = 0.7 kg/cm². N30 = 7.

Layer 4a: Low plasticity clay, gray to brownish-gray, stiff plastic state (CL). Thickness from 3.6 m to 14.9 m. R0 = 1.5 kg/cm². N30 = 6–19.

Layer 4b: Low plasticity clay and low plasticity silt, grayish-brown to gray, soft plastic state (CL). Thickness from 1.5 m to 11.2 m. R0 = 1.2 kg/cm². N30 = 6–9.

Layer 4c: Low plasticity clay, dark brownish-pink, flowing plastic state (CL). Thickness approximately 1.3 m. R0 = 0.8 kg/cm². N30 = 2–4.

Layer 5a: Low plasticity clay, yellowish-brown to reddish-brown, semi-stiff state (CL). Thickness from 4.0 m to 7.3 m. R0 = 2.0 kg/cm². N30 = 12–21.

Layer 5b: Low plasticity clay, yellowish-brown to reddish-brown, stiff plastic state (CL). Thickness from 1.5 m to 18.5 m. R0 = 1.5 kg/cm². N30 = 8–14, locally up to N30 = 30.

Layer 6a: Low plasticity clay, gray to brownish-gray, soft plastic state (CL). Thickness from 8.0 m to 9.0 m. R0 = 1.3 kg/cm². N30 = 6–11.

Layer 6b: Low plasticity clay, gray to yellowish-gray and greenish-gray, semi-stiff state (CL). Thickness from 1.3 m to 7.0 m. R0 = 2.0 kg/cm². N30 = 20.

Layer 8a: Low plasticity clay, dark brownish-gray, flowing plastic state (CL). Thickness approximately 12.0 m. R0 = 0.8 kg/cm². N30 = 6.

Layer 8b: Low plasticity clay, dark brownish-gray, stiff plastic state (CL). Thickness from 4.5 m to 9.3 m. R0 = 1.5 kg/cm². N30 = 7–14.

Layer 8c: Low plasticity clay, yellowish-gray, locally interbedded with sand, semi-stiff state. Thickness approximately 12.0 m. N30 = 18–23.

Layer 11a: Low plasticity clay, clayey sand, sand mixed with clay and silt, stiff to very stiff state (CL, SC, SC–SM). Thickness from 1.5 m to 9.3 m. R0 = 2.5 kg/cm². N30 = 37–50.

Layer T: Siltstone–mudstone, heavily weathered and highly fractured, purplish-brown gray, soft rock. Thickness approximately 2.2 m. Unconfined compressive strength: 116–586 kg/cm². N30 > 50.

Layer 11b: Siltstone–mudstone, dense to hard state (GC). Thickness approximately 3.0 m. R0 = 4.0 kg/cm². N30 > 50.

Layer 12a: Siltstone–mudstone, heavily weathered and fractured, soft to moderately hard rock. Thickness from 4.0 m to 18.0 m. RQD = 0–22%. N30 > 50.

Bored Pile Construction Works – Liem Son Overpass, Ha Nam

Based on the above geotechnical conditions, Hanoi Vietnam selected the following construction solution:

• SANY rotary drilling rig with locking Kelly bar or equivalent SR285
• Supporting crawler crane
• Flexible Kelly bored pile drilling rig for upper soil layers

Below are construction images recorded on site:

If you require our services, please feel free to contact us.

Hotline:
0988 601 755 (Mr. Henry);
0986 819 020 (Mr. Tung);
0963 601 755 (Ms. Anna);
0906 261 755 (Mr. Ngoc)

We are honored to serve our valued clients.

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