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1.1 COMPANY PROFILE
BSCPL Infrastructure Ltd is an ISO 9001: 2000 accredited infrastructure development company pioneers in execution of Road Projects, Irrigation projects and recently diversified into Real estate and Hydro Power plants. BSCPL have executed several prestigious projects across India and abroad including Afghanistan & Bangladesh, sometimes under adverse conditions. The experienced and visionary team of promoters, high degree of mechanization with skills in the state of the art technology, professionally qualified and experienced project managers and strong and stable workforce who can execute projects under adverse conditions, the ability to forge partnerships wisely and the practice of executing projects on their own has enabled BSCPL to emerge as a strong partner in the process of building the lifelines of nations. The awarding of grade CR2+ by ICRA indicating strong capacity to execute projects up to Rs. 350 crores in a year.
C & C Constructions Limited, incorporated in July 1996 by a group of professionals, is now one of India's fastest growing ISO 9001:2008 construction conglomerates focuse doncreating nationally important infrastructure assets.
C & C Constructions' activity areas include turnkey responsibility for Roads, Highways and Urban Infrastructure (water, sanitation and sewerage, power/telecom transmission, towers and commercial buildings).
C & C Constructions Ltd. has a unique business model, with proven expertise in innovative thinking, project and cost management. We are focused on delivering high quality work within budgeted time and costs, as evident in the various accolades and repeat business.
Our key objectives have also been to continuously broad base the operating portfolio and enhance the order book, thus opening new avenues to growth and profitability. We have also developed an appropriate blend of entrepreneurs and hands on professionals, constantly thinking & executing innovative and cost effective solutions to clients' requirements.
1 Introduction
National Highway Authority of India (NHAI), Govt. Of India has decided to take up thedevelopment of various NH corridors where the intensity of traffic has increased significantly and there is requirement of augmentation of capacity through public private partnership venture in Design – Build - Finance – Operate – Transfer format.
National Highway NH – 30 starts from intersection points of NH – 30 Patna – Baxur, Patna –Bakhtiyarpur and NH – 98 at km. 181+300 at Saristabad Patna.
The road fall in town of Fatuha and Bakhtiyarpur and connect to NH – 31 BakhtiyarpurBarhi section for Ranchi Hajaribagh, Tata and to NH -19 for Hajipur, Chhapra, Siwan, Muzaffarpur, Darbhanga etc.
The contract package Patna – Bakhtiyarpur section NH – 30 includes developing the existing two lane carriageway to four lane dual carriageway including strengthening of existing two lane road on BOT basis.
Builtup area is 13.5 km and 37.15 km is totally agricultural land. Project passes through villages.
There are 1 Major Bridge, 11 Minor Bridge, 75 Culverts, 7 PUP, 2 ROBs and 4 Grade Separators, 2 Major intersection, 11 Minor Junctions one Toll Plaza, One Truck lay bye, and six Bus lay byes.
BRIEF DETAIL KEY OF PROJECT
ROAD LENGTH :- 50 KM
ROB 1No at km. 182+572
ROB II - 1 No at km. 207+662
Flyover - 3 No at km. 183+015, 188+460 & 232+570
Major Bridge - 1 Nos. Km. 201+240
Minor Bridge - 11 Nos.
PUP - 7 Nos.
Truck lay bye - 1 Nos.
Bus lay bye - 7 Nos.
Toll Plaza - 01 – km. 194.000
DIFFERENT STAGE OF PROJECT
3.1. SURVEY AND ANALYSIS
Each and every civil engineering project starts with survey. There are various stages of survey. The first step of surveying is reconnaissance Then after that various maps of the site is studied. Only after this detail survey of proposed project site is done.
Here in this project a detail survey of the site is done by the Total Stationand various other instruments of surveying and layout is drawn in Autocad. With help of this total space available for construction, alignment of flyover and no. lanes of flyover & total carriageway.
It should be noted that surveying not only plays an important role in the design of the project but also in the execution.
TRAFFIC SURVEY AND ANALYSIS
The main purposes of traffic survey are: traffic monitoring, traffic control and management, traffic enforcement, traffic forecasting, model calibration and validating etc. The purposes of carrying out traffic volume count are designing, improving traffic system, planning, management etc. Traffic forecast predicts the future traffic volume levels on the project road.
In this project, the flyover is designed to meet the requirements of traffic for next 25 years.
From traffic survey it was decided to design the flyover for live load for a single lane of class 70R or 2 lanes of class-A.
3.3. GEOTECHNICAL ASPECTS AND ANALYSIS
It is very necessary to carry out thorough soil investigation of the site as the whole load of the structure is ultimately taken by soil through foundation. Feasibility, design and safety of the structure all depends upon load bearing capacity of the soil strata at the site.
For this purpose bore holes were drilled in the ground to get information about the sub-soil strata. Boring was done at an interval of 40m along the alignment and depth of exploration was 34m. Samples were taken from the bore hole and tested in the laboratory and engineering properties of the soil was investigated. Also some field test was carried out.
From these tests & investigations, it was concluded that the Soil Bearing Capacity (SBC) of the site was 230 MPa.
3.4. PLANNING & DESIGN
All the results were taken into account and with help of Various IS Codes detailed planning and design were prepared according to which execution is going through and the flyover is under construction.
From all available data a pile was designed and Initial Load Testfor pile was done to confirm the load carrying capacity of the single pile.