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TENDER DOCUMENTS FOR GEOTECHNICAL INVESTIGATIONS FOR DETAILED DESIGN FOR DUALIZATION OF KHUZDAR – CHAMAN SECTION OF N-25 ALONGWITH THE TECHNICAL STUDY AND DETAILED DESIGN OF ALTERNATIVE ROUTE AT LAKPASS AND TUNNEL AT KHOJAK PASS Background of the Project: Road transport plays an important role in the development of an economy. A country cannot progress unless it has a good system of road network. The progress of agriculture sector depends upon the speed with which farmers obtain the necessary seeds, fertilizers, pesticide and farm machineries etc. on the one hand: and find the market for the disposal of their surplus products, on the other. This is only possible when we have a good network of farms to market roads. Road transport also creates demand for the primary products, and stimulates the consumption of products of manufacturing sector. Thus it encourages the development of both agriculture and industry and provides a lot of encouragement for the growth of the tertiary sector such as banking, insurance and trading. It improves market intelligence and discourages market imperfection and also encourages price equalization among different transport regions of the country. Moreover, there is simple evidence to suggest that road transportation has helped to create local employment, facilitation of inter-community trade and migration, alleviation of poverty, and improvement of productivity. Various barriers like caste, colour, creed, location etc., have been broken by the operation of road transport service. A change in the people has also been brought about by the road transport service. It has result the spread of industrial units in smaller towns and many new towns have come into existence due to the operation of road transport. Balochistan area wise is the largest province of Pakistan, covering 44% of the country’s area, but is home to only 5% of the country’s population. Its strengths lie in its wealth of natural resources, the vast rangeland, the coastal belt with 1100 km of coastline, and rich mineral and hydrocarbon deposits. Balochistan is a land of diversity, mountains rich of minerals, coastal land, uplands, plains and deserts, having a diverse flora & fauna and land of great difference and contrast. Total length of national highways in Balochistan is 4,629 km (38% of the total NHA road network). But still the road density and especially the level of service of the roads in Balochistan is very less. Several projects are launched in recent years in Balochistan for development of the area and also to facilitate the traffic of CPEC which will bring additional prosperity to the area and interlink ages of different area through a good quality required will provide a backbone for the economic growth of the region. National Highway N-25 is very important link between Karachi and Chaman. The N- 25 or National Highway 25 is 813 km 2-lane national highway in Pakistan which extends along from Karachi in Sindh province to Chaman in Balochistan province. It was previously known as the Regional Cooperation for Development Highway (RCD Highway).The RCD Highway was constructed under a treaty between Pakistan, Iran and Turkey and was first constructed during the regime of SardarAttaullahMengal as Chief Minister of Balochistan.The N-25 National Highway or RCD Highway connects Balochistan with a number of provinces and cities in Pakistan, Iran and Turkey. It is 813 km long, passing through Karachi, Bela, Khuzdar, Kalat, Quetta and Chaman and continuing into Afghanistan, It then joins N-40 (National Highway 40 Quetta- Taftan International Border Circuit) which leads it via Naukundi to Road 84 in Iran and through various Iranian Highways to Turkey and onwards Europe. The highway also has a recent connection to Gwadar through N-85 from Surab. It also passes through many towns in Balochistan. It is a major road for Balochistan, connecting the province with the rest of Pakistan. National Highway Authority (NHA) intends to convert this 2-lane facility from Khuzdar to Chaman into four lane highway for smooth and quicker movement of traffic. NESPAK (Pvt) Ltd has been awarded the work of Dualization of Khuzdar to Chaman section of N-25 along with technical study & detailed design of alternative route at Lakpass& Tunnel at Khojak Bypass. This document covers the detailed methodology along with programme of working. The proposed project will improve the social and economic condition of the people of surrounding. TERMS OF REFERENCE Geotechnical Investigation for Structures: Sub-surface investigation consist of boreholes / drill holes / test pits of required depth, supplemented by field / laboratory testing to accurately assess the engineering properties of underlying soil strata for detailed design of foundations, substructures and roads. A separate report will be prepared to this effect and will be submitted to NHA for approval. Original lab reports shall be attached in the soil report along with colored photographs. Bore logs shall be included in the soil investigation report along with the laboratory results. Testing of samples collected from site shall be carried out in a reputed laboratory, under strict quality control and adherence to relevant ASTM procedures / standards. Depth of boring shall be decided by the geological formation at site and the type of foundations proposed for the structures. Standard penetration test shall be started from the ground surface and carried out in accordance with ASTM D1586 Penetration test and split barrel sampling of soils. Where clayey soils are encountered, undistributed samples shall be obtained in accordance with ASTM thin- walled sampling of soils. The site investigation to be undertaken shall be consist of the following: • Deep machine boring to a maximum depth of Forty Five meters (45) min. below ground level and associated field-tests for major bridge and Thirty meters (30) for small bridges. • Detail of test to be carried out is attached as ANNEXUE-I. • Pile capacity curves will be developed by contractor for 0.76m, 1m, 1.2m and 1.5m diameters piles. • Contractor shall quote the rates for linear meters of confirmatory boring. Financial form is attached as ANNEXURE-II. • Submission of proper site investigation report comprising all relevant notes and pertinent information required under specifications together with laboratory test results. The above scope of work may varied or deleted depending on the findings as investigation proceeds. • Time duration for the assignment is 2 months from the date of contract agreement. ANNEXURE-I SP-414 SOIL INVESTIGATIONS AT BRIDGE SITES 414.1 SCOPE OF WORK The Contractor shall carry out confirmatory boring at bridge and Flyover sites at locations marked on the drawings or as directed by the Engineer’s Representative. The purpose of the Work specified herein is to determine the type, nature, arrangement, thickness and texture of the various subsurface strata, the conditions and the Engineering characteristics of the subsurface materials as they exist to the depth and at the locations specified. This is to be accomplished by means of drilling, in-situ testing, collection of disturbed and undisturbed soil and water samples and laboratory testing. The Contractor shall carry out the specified works under the supervision of the Engineer’s Representative. 414.1.1 Plant and Equipment The Contractor shall keep at-least one rotary drill machine and one percussion winch along with accessories on the site to meet the requirements of the Work. The plant and equipment shall be in good operating condition and capable of performing efficiently the Work as set forth. 414.1.2 Drillers and Supervisory Staff The Contractor shall provide qualified, experienced, orderly and thoroughly competent persons at all times including geotechnical engineers or engineering geologists who shall conduct and supervise drilling, sampling, logging and in-situ testing at the site. The Contractor shall remove any of his employees from the site that in the opinion of the Engineer does not meet these requirements. The Contractor shall make his own arrangements for housing of his personnel, security and storage of the equipment and supplies at the site. 414.1.3 Setting up at each Hole The Contractor shall make all the necessary arrangements for setting-up plant and equipment at each location, carrying out the work specified, preparation and reinstatement of the work areas, improvement to access routes and all other temporary works. 414.1.4 Measurement of Quantities The quantities shown in the Bill of Quantities are only approximate. The payment shall be made on the basis of actual work performed in accordance with the Specifications. 414.1.5 Submission of Field and Laboratory Data The Contractor shall supply complete field and laboratory investigation data to the Engineer’s Representative within the time set-forth for completion of works. This data shall include copies of all the approved logs and test records provided during the course of the Contract including any alterations or amendments required by the Engineer’s Representative. 414.1.6 Location of Investigation Points a) The locations of investigation points shall be established in the field by the Contractor on the basis of the Drawings to be provided later or as directed by the Engineer’s Representative. Locating the boreholes accurately in the field shall be the sole responsibility of the Contractor. b) It is to be understood that further Drawings may be issued by the Engineer showing the revised locations of investigation points. c) All the investigation points shall be located by the Contractor through field survey to an accuracy of 1 m in plan and 0.05 m in ground elevation. 414.2 WORK METHODOLOGY 414.2.1 Investigated Areas The location of the boreholes will be selected as directed by The Engineer. The Engineer will specify from time to time during the Contract period, the exact location and reference number of all holes. To locate the holes accurately in the field shall however be the Contractor’s responsibility.