Animasi Jembatan Ngarai Sianok Bukittinggi

Summary

The video outlines the engineering design and construction of the Ngarai Sianok Bridge in Bukittinggi, West Sumatra, which aims to connect Bukittinggi and Agam. The bridge features a multi-span cable-stayed structure, with a 680-meter total length and a foundation designed to handle large loads. The construction involves detailed phases, including site preparation, piling, superstructure assembly, and stress testing. The bridge will accommodate four lanes of traffic, with dedicated pedestrian walkways, and is designed to endure the challenging geological conditions of the Sianok Gorge. The project is a key development for enhancing connectivity in the region.

Takeaways

• 😀 The Ngarai Sianok Bridge project connects Padang City to Bukittinggi through a faster route, bypassing urban congestion.
• 😀 The bridge design includes four lanes of traffic with space for pedestrians, and a width of 24 meters.
• 😀 A multi-span cable-stayed system is used for the Ngarai Sianok Bridge, with longitudinal and fan-type transversal cable arrangements.
• 😀 Box girders are made from reinforced concrete, while cantilever beams are constructed using steel, ensuring strong support.
• 😀 The bridge's foundation uses bored piles with a diameter of 1.5 meters, designed for high load-bearing capacity.
• 😀 Construction involves drilling for foundation piles, casing to prevent soil collapse, and using self-compacting concrete for pile installation.
• 😀 The superstructure is built using a balance cantilever system with travelers to install bridge segments efficiently.
• 😀 The construction of the bridge's deck involves careful formwork installation, concrete pouring, curing, and tendon tensioning to meet strength requirements.
• 😀 The final phase includes installation of railings, road paving, lighting, and painting to complete the bridge.
• 😀 The completed bridge will provide a safer, faster route between Bukittinggi and Agam District, supporting regional development.

Q & A

What is the purpose of the Ngarai Sianok Bridge project?

The Ngarai Sianok Bridge project is part of a plan to develop a road network connecting the city of Padang to Bukittinggi. The bridge aims to offer a faster route while avoiding urban areas, as well as connecting the Bukittinggi Outer Ring Road and Bukittinggi Bypass to the Trans Sumatra Highway.

What are the key features of the Ngarai Sianok Bridge's design?

The Ngarai Sianok Bridge is designed to accommodate four-lane traffic with two-way lanes, a median, and sidewalks for pedestrians. The bridge will utilize a multi-span cable-stayed structure with a longitudinal single-plane cable system and a transverse fan cable arrangement.

Why was a cable-stayed design chosen for the bridge?

A cable-stayed design was chosen for the Ngarai Sianok Bridge due to the challenging geographical conditions of the area, including a deep gorge. This structure provides the necessary support and stability while minimizing the need for excessive foundations.

How long is the Ngarai Sianok Bridge?

The total length of the Ngarai Sianok Bridge is approximately 680 meters.

What type of foundation is used for the Ngarai Sianok Bridge, and why?

The Ngarai Sianok Bridge uses bored pile foundations due to the hard soil conditions and the large capacity requirements of the bridge. The bored piles are designed with a diameter of 1.5 meters to provide the necessary axial load-bearing capacity of approximately 1,000 tons.

What construction challenges are addressed by using casing during the foundation work?

Casing is used during foundation work at a depth of 0 to 10 meters, where the soil consists of loose sand. The casing prevents the walls of the borehole from collapsing during installation and concreting of the foundation piles.

What is the method used for constructing the bridge’s superstructure?

The superstructure of the Ngarai Sianok Bridge is constructed using the balanced cantilever method with the help of travelers. This method allows for precise placement of segments and reduces the need for scaffolding in the deep gorge.

How are the segments of the bridge’s superstructure assembled?

The segments of the bridge’s superstructure are assembled in stages. Initially, the formwork is installed, followed by the placement of tendons and reinforcement. Concrete is poured into the formwork, and after curing, the segments are stressed and connected to the next segment using a stressing cable.

What materials are used in the construction of the Ngarai Sianok Bridge?

The Ngarai Sianok Bridge utilizes materials such as high-strength concrete for the foundation and deck, as well as steel for the cable-stayed system and cantilever beams. The concrete used is self-compacting to ensure a smooth finish and optimal strength.

What are the final steps in completing the bridge construction?

The final steps of the construction process include the installation of railings, paving of the roadway, installation of lighting systems, and painting to protect the structure and enhance its aesthetics.