If dewatering of an excavation is required, the contractor shall submit proposed methods and details to the saudi aramco. Many times weak subgrades require special backfill to correct problems. Any items within the rightofway that are designated to remain in place not to be aredisturbed or damaged by the contractor. Region 6 oregon and washington metric special project specifications for road construction, and the usda forest service testing procedures are written in microsoft word 6. Skb 1999, likely at the olkiluoto site posiva 2006. The foundation base provides a smooth, level working surface for the construction of the concrete foundation. When structures are installed in streets, highways, or other paved areas, cut pavement and base to neat lines. Referring to other than above mentioned documents is done using harvard style and. Excavation and backfilling of soil work sequence and. This consistworks of the removal and disposal of all vegetation and debris within the limits of construction which is in the way of the construction work. In requesting the use of a substitute material, the applicant must submit adequate evidence that the material has been successfully. All trenches shall be excavated to accommodate the bedding as required in table 2220. Substitute bedding and backfill materials may only be used if prior written approval from tmwa is received. Contract documents or the district, trench excavation shall provide a.
When the excavated materials are not satisfactory the developercontractor shall provide imported granular material. Practically all types of construction can be founded on compacted. Chapter 22 materials and construction specifications section 22. Special backfills play an important role in highway construction. As an aid to the designer, these standard specifications are provided for the inclusion in proposed development projects for ease, efficiency and cost savings.
Any backfilling operation has to comply with the recovery definition by replacing other materials or being prepared to fulfil a particular function. Use of recycled construction and demolition wastes rcdw as backfill of reinforced soil structures. This is followed by completely backfilling the top of the underground structure. The area surrounding meter boxes shall be backfilled with backfill material conforming. City of fargo specifications excavation, trenching, and backfilling for underground work part 1 description of work the terms excavation and trenching, either individually or collectively, as used in these specifications and other contract documents shall refer to and shall mean all material excavated or.
Duke university construction standards 2017q3 section 31 23 00 page 1 1 31 23 00 trenching, backfilling, and compaction of utilities 1. Construction material for backfilling the embedment is to be coarsebodied soil up to a coarseness of 20 mm. New service construction checklist jocarroll energy. Selected backfill shall be of a quality acceptable to the engineer and shall consist of. The site should be prepared by clearing and grubbing all.
Associated with the term backfilling is the notion of a permanent placement of the material onin particular sites, it is not intended be returned to the economic material cycle. The settlement and bearing capacity of underlying foundation soils also should be evaluated. Place and compact granular beds, as required, and backfill. Preparing subgrade for building slabs, walks, and pavements. Correct measurement of excavation and backfilling is required because excavation cost is major part of the foundation construction. The staking should be completed before advertising the project. This item does not include backfilling pipes within a trench or minor miscellaneous structure excavations outside the limits of the roadway. It is recommended that all installers are familiar with this guide, and that the contractor inspects the chambers for distortion, damage and joint integrity as work progresses. Extend the fill well beyond the loading area, except where the fill is placed against a cut slope. Ruby pipeline project final winter construction plan november 2010 21 2. As regards the material for the main backfill, it can be assumed that in many cases, the ground removed in excavating the trench has been used again so that nearly all types of soil can be found in this region. Guidance on the interpretation of the term backfilling. Where the fill is relatively thick and is underlain by soft materials, check its stability with respect to deep sliding. Construction staking shall be performed under the direction of a registered professional engineer or land surveyor.
Section 02220 trenching, backfilling and compaction of utilities page 02220 city of lynchburg, va manual of specifications and standard details december 2016 2 trench depth. Imported granular material for foundation, bedding, and backfill shall be cleaned crushed rock or gravel, free from sod, vegetation, and other organic or deleterious material. Section 02220 trenching, backfilling and compaction of utilities page 0222016 city of lynchburg, va manual of specifications and standard details december 2016 b. Removal of portions of the existing sanitary sewer line that crosses the site and its backfill with well compacted structural fill. The engineer or surveyor will be closely associated and familiar with the construction staking. The contractor shall furnish all labor, materials, tools, equipment, and perform all work and services necessary for or incidental to the furnishing and installation, complete, of all. The construction representative or engineer may order as many inplace density tests as he deems necessary to insure proper compaction. Construction and materials related to this section but specified in other specification. Page 1 of 2 large capacity cesspool less than 1,000 gpd backfilling final completion report us environmental protection agency region 9 ground water office.
Road construction related autocad drawings and specifications. Removing materials necessary for the construction of bridge footings and substructures disposing of excess materials and required backfilling, including porous backfill. Stake the sites as set forth in chapter 10 of this manual. In construction, backfill replaces soil that is removed during building construction, and it is used to strengthen and support a structures foundation. Intro to foundations fill backfilling r ced engineering. In finland the concept selected is construction of a deep repository in crystalline rock posiva 1999, 2006. The construction representative or engineer may order as many in place density tests as he deems necessary to insure proper compaction. If an inplace density test indicates insufficient compaction, the contractor shall recompact the area in question until the backfill is compacted to the requirements set forth in paragraph 4.
The granular bedding has a minimum thickness of one. Unless otherwise directed, the backfilling shall continue as directed to the level of the. Account name billing address home phone work phone cell phone electrician name and telephone number 911 address of new service wcity required before connection. Backfilling techniques and materials in underground excavations. Regional office engineering road construction related autocad drawings and specifications select an underlined filename to download. Open cut trench excavation consists of excavating a trench for the manual installation of each stick or piece of pipe. Class c bedis that condition where the pipe is bedded in compacted ding granular material. As regards the material for the main backfill, it can be assumed that in many cases, the ground removed in excavating the trench has been used again so.
These points must be kept in mind to take necessary action during excavation and backfilling. Introduction to fill and backfill for structures cedengineering. Disposal of materials or debris shall be done in accordance with section 22. Pdf mining industry is a demanding sector for human advancement. Following are the sequence of works for excavation and backfilling of soil. This method is usually the least expensive method if the pipe is located under non. The work included under this section consists of excavating, backfilling and compaction as requi red for th e c ons tructi on of the pi ping sys tems as spec ifie d herei n. Section 206 excavation and backfill for culverts preconstruction the materials and geology programs of the department are available for consultation for any problems incurred during this work. Earth excavation and backfilling for construction of pipe and appurtenances, and for required removals. Construction and demolition waste management in united. If an in place density test indicates insufficient compaction, the contractor shall recompact the area in question until the backfill is compacted to the requirements set forth in paragraph 4. Final winter construction plan bureau of land management. New service construction checklist jocarroll energy membership form new service application for electric or natural gas the following information is needed.
The backfills are of different types which are used according to the requirement. Excavation, backfilling, and compaction for sanitary sewer pipelines, service lines, manholes and incidental construction. Geotechnical manual updates and drilling inspections. For the purposes of this report, claybased backfilling materials are defined as those containing a claymineral fines component. Drawings and general provisions of contract, including general and supplementary conditions and division 01 specification sections, apply to this section. During construction, the contractor shall construct and maintain satisfactory, substantial, and appropriate barricades and steel plates at all excavations, at. After backfilling, all trenches except those in existing paved areas shall be graded flush with adjacent finish or subgrade elevations. Construction stakes, reference points, and temporary bench marks shall be set in. Special backfill may also be necessary to facilitate good compaction around structures, such as catch basins, manholes, pipes, or bridge end bents. Types of backfilling materials used in building construction. Considering the present condition of the site there is the public canal located approximately 5 meters eastside from the phenol boundary.
Disposal of excavated materials including stripping and stockpiling topsoil, salvage of material for backfill and removal of excess or material removed and not suitable for reuse. Cad drawings these drawings are created in autocad ver and ver 14. Drawings and general provisions of contract, including general and supplementary conditions and division 01 specification sections, apply to. Begin and complete backfilling around substructures not supported by piling the next workday after placing the. The purpose of the mow standard specifications for construction is to provide the design professional with a guide for accepted construction practices for ministry of works projects.
Excavation, backfilling and reinstatement of construction layers at a glance qualification recognised by. Different types of backfills course grained soil coarsegrained soils include gravelly and sandy soils and range types of backfilling. The lwgm developed from the study can be used in the form of blocks of any size precasted and cured at casting yard near site or as wet mix to be placed in bulk for the desired construction job. Replacement of damaged chambers during or after backfilling is costly and very time consuming. Any use of district water for construction purposes must be from a hydrant or other. Dispose of surplus materials in accordance with federal, state, and local regulations. Backfill over, under and around pipes and struc tures shall be of selected material placed and tamped and compacted in a manner and by. Section 211bridge excavation and backfill page 3 compact backfill for intermediate bents and piers to the approximate density of the surrounding soil. With respect to the design and construction of backfill, the following process summarised in. For the interpretation of the term backfilling and the proper classification of waste treatment to this category in waste statistics it is helpful to consult both the waste framework directive wfd 200898ec and the commission.
Backfilling techniques and materials in underground. This course is an introduction to fill and backfill for structures. Definitions concerning construction and demolition waste cdw and management in this section the definitions of waste used in the uk are detailed. Excavation and backfilling of soil work sequence and procedure. Guidance on the interpretation of the term backfilling from reference year 2010 onwards statistics on waste treatment according to the regulation on waste statistics 21502002ec covers the treatment category backfilling. Boreholes depths between 0 to 15 ft after cave in backfill with salvage soil up to the upper 2. This standalone module 03 addresses the main aspects of earthworks in general. Pdf use of recycled construction and demolition wastes rcdw. Excavation and backfill pdf san francisco public works. Backfilling definition of backfilling by the free dictionary. After removing obstructions, restore the bottom of the excavation to grade by backfilling in accordance with this item. Compaction of backfill or embankment around all structures shall be in accordance with the requirements of aashto lfrd bridge construction specifications with exceptions as. Trenching, backfilling, and compacting section 02221 4 the encounter of ground water not anticipated in engineering reports made available for this contract, and the required overexcavation and construction of a stable base as determined necessary by the engineer shall be considered over and above the.
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