Innovations at SRK

Precast Prestressed Concrete Panel Road – PPCP Road

At present, various roads in the state are being constructed in the traditional cement-concrete manner, which takes a long time to construct, causing traffic congestion, increasing the number of accidents and deteriorating the quality of roads.

Inorder to overcome these flaws, an experiment was conducted by the Public Works Department in Nagpur District. A road was constructed using Precast Prestressed Concrete Panel in a densely populated area of 450.00 m length from Rajiv Nagar-Zenda Chowk to Isasani Road in Hingana Taluka.

Characteristics of PPCP Roads

No need for preparation of base and can be placed directly over existing even surface.
Lower disruption to traffic and enhances vehicular safety
PPCP Roads can be designed as per available length, width and depth.
PPCP Roads can be made and assembled in any climate or temperature.
PPCP Roads can be open to traffic immediately (No need for curing at site)
Thickness of PPCP Road is 35%-40% less than traditional roads
Durability, Lifespan and Riding Quality is improved with PPCP
Damaged panels can easily be repaired and replaced without disrupting traffic.

Step 1

Base and Mould Preparation

Step 2

Panel Fabrication

Step 3

Pre-Stressing

Step 4

Casting

Step 5

Lifting after 72 hours of casting and shifting to site

Step 6

Assembly

PreCast Arch Bridge

The engineering benefits of arches have been known for thousands of years, and explored most famously by the ancient Roman Empire. Materials and methods of design have evolved over the years, but the basic principles have remained the same.

The overburden load is carried along the arch from the top down to both ends, in pure compression, with zero or minimal tension in the arch member. It allows for a very efficient design of the arch span, and use of materials that typically do not have a high tensile capacity.

Concrete Arches provide both near and long term benefits:

No Maintenance – The system is a soil and concrete structure that eliminates bridge deck replacement, painting, and Steel work
Saves Time and Money – From the relatively simple design to the short construction sequence, the time required to design, get approval and install an arch system is up to 50 percent less than a comparable bridge span.
Optimized Design – By using a design-build approach to bridge construction the entire structure can be optimized from design of the heavily loaded foundation, the approach walls and wing walls, to the arch itself.