SUB GRADE AND ROAD BASE, APPLICABLE CODES AND STANDARDS, AMERICAN SOCIETY FOR TESTING AND MATERIALS, PARTICLE SIZE ANALYSIS OF SOILS, LIQUID LIMIT OF SOILS, PLASTIC LIMIT AND MALLEABILITY INDEX OF SOILS, DENSITY OF SOIL IN SITU BY THE SAND-CONE METHODOLOGY, MOISTURE DENSITY RELATIONS OF SOILS AND SOIL-AGGREGATE MIXTURES MISTREATMENT TEN POUND. (4.54 KG) RAM AND EIGHTEEN IN. (457MM) DROP TESTS, RELATIVE DENSITY OF COHESION LESS SOILS, DENSITY OF SOIL IN SITU BY THE RUBBER-BALLOON METHODOLOGY, DEFINITION OF TERMS AND SYMBOLS ABOUT SOIL AND ROCK MECHANICS,BRITISH STANDARDS INSTITUTE, METHODS FOR SAMPLING AND TESTING OF MINERAL AGGREGATES, SANDS AND FILTERS, WAYS FOR TESTING SOILS FOR TECHNOLOGY FUNCTIONS

SUB GRADE AND ROAD BASE, APPLICABLE CODES AND STANDARDS, AMERICAN SOCIETY FOR TESTING AND MATERIALS, PARTICLE SIZE ANALYSIS OF SOILS, LIQUID LIMIT OF SOILS, PLASTIC LIMIT AND MALLEABILITY INDEX OF SOILS, DENSITY OF SOIL IN SITU BY THE SAND-CONE METHODOLOGY, MOISTURE DENSITY RELATIONS OF SOILS AND SOIL-AGGREGATE MIXTURES MISTREATMENT TEN POUND. (4.54 KG) RAM AND EIGHTEEN IN. (457MM) DROP TESTS, RELATIVE DENSITY OF COHESION LESS SOILS, DENSITY OF SOIL IN SITU BY THE RUBBER-BALLOON METHODOLOGY, 

SUB GRADE AND ROAD BASE, APPLICABLE CODES AND STANDARDS, AMERICAN SOCIETY FOR TESTING AND MATERIALS, PARTICLE SIZE ANALYSIS OF SOILS, LIQUID LIMIT OF SOILS, PLASTIC LIMIT AND MALLEABILITY INDEX OF SOILS, DENSITY OF SOIL IN SITU BY THE SAND-CONE METHODOLOGY, MOISTURE DENSITY RELATIONS OF SOILS AND SOIL-AGGREGATE MIXTURES MISTREATMENT TEN POUND. (4.54 KG) RAM AND EIGHTEEN IN. (457MM) DROP TESTS, RELATIVE DENSITY OF COHESION LESS SOILS, DENSITY OF SOIL IN SITU BY THE RUBBER-BALLOON METHODOLOGY, DEFINITION OF TERMS AND SYMBOLS ABOUT SOIL AND ROCK MECHANICS,BRITISH STANDARDS INSTITUTE, METHODS FOR SAMPLING AND TESTING OF MINERAL AGGREGATES, SANDS AND FILTERS, WAYS FOR TESTING SOILS FOR TECHNOLOGY FUNCTIONS

SUB GRADE AND ROAD BASE

PART one – GENERAL

1.1          DESCRIPTION

This section covers the specification, trimming, compaction, protection, reconditioning and testing of subgrade and roadbases before the appliance of ulterior construction layers.

1.2          SECTION INCLUDES

This section covers the furnishing of materials, instrumentality and labour for excavating, trimming, wet learning, protection, dirt management and compaction of sub grades and road bases. 

1.3          RELATED SECTIONS

02200    Earthwork          

1.4          RELATED OBLIGATIONS

A.            the final necessities below Division one apply to figure per the section.

B.            The Contractor shall examine all different sections of the specification for necessities which can have an effect on work of this section.

C.            The Contractor shall coordinate work with all different trades touching or stricken by activities of this section. get together with such different trades to assure the steady progress of all operations below the Contract

1.5          APPLICABLE CODES AND STANDARDS

The following codes and standards square measure meant to produce a suitable level of quality because the documented codes and standards to be submitted by the Contractor to the Owner for approval ahead of their use.

ASTM    American Society for Testing and Materials

D 422     Particle Size Analysis of Soils

D 423     Liquid Limit of Soils

D 424     Plastic Limit and malleability Index of Soils

D 1556   Density of Soil in situ by the Sand-Cone methodology.

D 1557   Moisture Density Relations of Soils and Soil-Aggregate Mixtures mistreatment ten pound. (4.54 kg) ram and eighteen in. (457mM) Drop Tests.

D 2049   Relative Density of Cohesionless Soils

D 2167   Density of Soil in situ by the Rubber-Balloon methodology

D 653     Definition of Terms and Symbols about Soil and Rock Mechanics

BSI          British Standards Institute.

BS 812   Methods for sampling and testing of mineral aggregates, sands and filters.

BS1377  ways for testing soils for technology functions.

BS6031  Code of apply for Earthworks

1.6          SUBMITTALS

A.            methodology STATEMENT AND PROGRAMME

The Contractor shall give the Owner with the subsequent information:

a.            methodology STATEMENT: shall embrace planned excavation and compaction plant, methodology of excavation, filling and compaction, methodology of treating slopes, protection of formations, etc.

b.            PROGRAMME OF WORKS: a minimum of fourteen days before the beginning of the Works. 

1.7          QUALITY management

A.            REPORTING

INSPECTIONS AND APPROVALS

The Contractor shall befits any necessities of relevant native authorities concerning the notification, review and approval of all excavations and formation levels.  The Contractor shall keep dated records of the inspections and any directions, that end in the outlined limits of the excavation being exceeded.

The Contractor shall offer the Owner AN united amount of notice of the time every formation level are going to be exposed in order that the Owner could, if he therefore needs, examine the formation. this era shall be a minimum of twenty four hours.

The Contractor shall maintain, and replica to the Owner occasionally to be united, full records of notices, inspections, and therefore the time of formation exposure before covering up.

The Contractor shall maintain a professional representative on-the-scene throughout all earthworks operations. Weekly internal control Report are going to be equipped to the Owner summarising the following:

a.            Daily review reports

b.            Soil check results together with relative compaction (from previous week’s samples)

c.             Water quality tests

d.            Samples taken on (and quantity of labor painted by every individual sample)

e.            internal control performance

f.             A Monthly internal control Report are going to be equipped to the Owner summarising the following:

g.            Weekly internal control report

h.            management charts (showing previous sixty days aforethought check results/control measure, etc.).

i.              planned internal control programme enhancements, if acceptable.

j.             Revisions to frequency of testing

k.            Work suggested for acceptance

The Owner shall approve the monthly internal control Report before being admit table as a contract record.

B.            SETTING OUT

The Contractor shall give full time dedicated surveyors and technicians to undertake measure and for the presentation of results.  The Contractor can give curricula vitae of key personnel together with the pinnacle surveyor and technicians. If the Owner believes for any reason that any of the personnel square measure unsuitable the Contractor shall take away them from web site and quickly realize a replacement. 

The Contractor shall establish a top quality assurance procedure to internationally recognized standards so as to assure the accuracy of the popping out and quality of the data. A freelance company approved by the Owner shall undertake monthly audits. Audit reports are going to be issued on to the Owner.

All plans and cross sections shall be bestowed to the Owner in AutoCAD 2006 dwg format.  Access to the digital records are going to be needed in any respect time by the Owner.  The Contractor shall agree the format of drawings and therefore the system of digital documentation management with the Owner.

 

 

PART two – product

2.1          DEFINITIONS

A.            FORMATION

Formation shall mean the surface of the bottom once completion of any excavation or filling operation.

PART three - EXECUTION

3.1          FORMATIONS

A.            PROTECTION

To avoid injury to excavation formations, excavation surface shall be left a minimum of 150mm on top of formation level till like a shot before being offered for review. Oozing and water shall be unbroken off the works as nominal.

Construction plant and different traffic shall not be operated on the formation, aside from that needed for preparation of the formation, unless adequate protection is provided.  The Contractor's proposals for making ready the formation and particularly however he intends to traffic it shall be united with the Owner.

If any square measures of formation are broken by the weather or the other cause the Owner shall be like a shot notified.

The Contractor shall not permit any formation to be left exposed for over four hours once being uncovered.

B.            PREPARATION

All formations shall be cut, levelled, cleared of loose material and compacted, in accordance with the Specification, prepared for review. 

After removal of any protection layer and unless otherwise directed, road formations shall be now compacted in accordance with this Specification. Before installation of A1a appropriate fill, material is to be compacted or existing subgrade to be compacted to needed elevation. The compaction technique shall, for this purpose, be assumed to be as for a layer of 300mm finished thickness compacted in compliance with this Specification.

Immediately when this compaction, the formation shall be cut to attain the desired tolerances.

After trimming, or re-trimming if necessary, the formation shall be rolled with a minimum of 1 pass of a smooth-wheeled roller having a mass per meter dimension of roll not but 2100kg, or, a vibrating roller having a mass per meter dimension of not but 700kg or a moving plate compactor having a mass per m² below the bottom plate of not but 1400kg. The primary layer of building shall cowl it now when review.

3.2          DUST management

The Contractor shall

a.            Use all means that necessary throughout the world of the location below the occupation of the Contractor to regulate dirt on and close to the work and on and close to all borrow areas.

b.            completely moisten all surfaces pro re nata to stop dirt being a nuisance or a hazard to the occupants of the prevailing properties, and to the general public and synchronous  performance of alternative work on website. 

3.3          CONTROL OF WATER

The Contractor shall:

a.            Keep all work well drained in the slightest degree times and make sure that all work is meted out in unsaturated conditions in accordance with the “Method Statement” for the management of water as ready and suggested by the Contractor and approved by the Owner.

b.            Construct, operate, and maintain wells, sumps, pumps, relief well systems, evacuation channels, pipelines and culverts, necessary for excluding water from the work to confirm stability of excavations, whereas construction is ongoing.  Such temporary works and plant shall embrace spare units unbroken prepared for immediate use just in case of breakdowns, and shall not be removed while not the approval of the Owner.  All pipelines, culverts and instrumentality not toward land within the possession of the Contractor shall be fitly designed for Construction traffic.

c.             create provision for the discharge or disposal from the work of all water and waste product howsoever arising and supply temporary pipes, flumes or channels. 

The Owner reserves the proper to direct the Contractor to put in, operate and maintain evacuation, pumping systems and well systems whenever, within the opinion of the Owner the ways getting used by the Contractor to regulate water area unit inadequate, nonetheless any previous acceptance of such ways.  No extra payment shall be created for evacuation systems put in, operated and maintained at the direction of the Owner.

 

 

 

3.4          TESTING

Testing of formations shall be meted out in accordance with section 02315.

3.5          TOLERANCES

The permissible deviations of the formation levels as outlined during this Specification from the positions shown or determinable from the drawings and with regard to the closest information level shall be as follows:

PERMISSIBLE DEVIATIONS OF FORMATION LEVEL

Beneath road and parking lot construction           + 20mm - 30mm mound and cutting slopes and pedestrian footways (unsurfaced) ± 50mm.