人工回填土(英文版).docx

Project nameDetail partsProject numberDateDetails:Manual backfill This technology contents suitable to use the general application of Foundation pit of industrial and civil buildings, indoor flooring, base slot, tunnel, outdoor manual backfill such as fertilizer tank and apron works. 1 materials requestEarth: should use priority of dredged soil in Foundation trench, but shall not contain organic impurities. Should be sifted before use, its diameter is not more than 50mm. Moisture content should be consistent with the rules. 2 Major machineRana wooden Rammer, tamper, wheelbarrows, sieve (pore size 4060mm), wooden rakes, shovels (sharp and flat), and2m on foot, hose, small lines and wooden folding rule. 3 Operational conditions（ 1) prior to backfilling, Foundation, box-shaped foundation walls or underground waterproofing layer, cover layer should check acceptance. Having good privacy and inspection procedures. Based on the strength of concrete should meet the requirements set out in order to backfill. （ 2) before construction, according to the project characteristics, type of fill material, density requirements, working conditions and other reasonable determination of filled soil moisture control and an imaginary number thickness of paving and compaction parameters, such as main backfill earthworks, compaction test should pass its argument to determine. （ 3) trench and room heart backfill, on the completion of sewer pipes installed or again after the trench wall reinforcement. And such as grooves, stagnant water and organic matter on the floor clean. （ 4) before construction should take level flag, as in the pit (tank) or on the trench slope every 3M nailed horizontally on wooden stake; Indoor and apron wall bounce on the level or elevation control stakes on the nails on the wall. 4, operation processTechnical process: The Foundation pit (slots) bottom cleaning inspection layered soil and hierarchical soil filling damping-compacting screed acceptance（ 1 ) Before filling the pit(slots) trash debris should be cleaned up; Fertilizer tank filling, must clear up to the underlying base elevation, cleared the fall back of loose soil, mortar, stone, etc. （ 2 ) Test of backfill soil moisture are within control or not, such as high water content, can be turned loose, dry measures such as uniform or mixed with dry soil; In case of backfill soil moisture content is low, water wetting in advance may be used, among other measures. （ 3 ) Backfill soil should hierarchical filling. Long and thick of each layer soil should be determined according to the density of soil quality, performance requirements and implements. Frog-type ramming machine on each floor paving thickness is 200250mm; manual construction site is not more than 200mm. After each casting, then raked. （ 4 ) Backfill rammed at least three times on each floor. Ramming a tamping pressure semi-ramming, tamping Rammer connected, connected to the line, and vertical and horizontal cross. And water for watering the soil subsidence is strictly prohibited so-called water consolidation method. （ 5 ) Two foundation shades (slot) are connected, should first be filled ramming deep Foundation; when filled to elevation of shallow Foundation pit, filled with dynamic compaction of shallow Foundation pit. Subparagraph if it is necessary to fill in when tamping, junction shall be filled into ladder. Upper and lower dislocation distance of not less than 1. 0m。 （ 6 ) Excavation (slots) backfill should be carried out simultaneously at the sides, or around side. Base elevation on both sides of the wall must not deviate too much, so as not to crowd the wall; long trench wall, braced internally measures should be adopted. （ 7 ) When a trench and backfill, to prevent the pipe centerline when displacement or damage the piping, manual soil fill on both sides of the pipe solid and should be carried out both by the pipeline until the pipe top 0 .5m above, without causing damage to the pipeline cases, frog-type ramming machine can be used to damp. Interface, anticorrosive insulation or cable around backfill should be fine. （ 8 ) After backfill each floor infill should be provided soil sample with specifications, after dry soil mass density is measured, meet the requirements, then take the paved with a layer of soil. Filling completion, there shall be a line level, where a higher tolerance, line levelled in time; where less than the standard height to be filled soil compaction. （ 9 ), Construction in rain and winter1 ) Foundation (tank) or trench backfill should be carried out continuously, as soon as possible. To prevent surface water from entering in the construction pit (tanks) in order to preclude any slope collapse or destruction of base soil. Waterproof and drainage measures should be set at the site. 2 ) Thickness of backfill soil layering in winter should decrease 20 50 % in normal temperature, which volume shall not exceed the total volume of the soil block of frozen soil 15 %, Its size must not be greater than 150mm 。 Shop filled block of frozen soil should be evenly distributed, by lamination (ramming) reality. Trench from end of tube-top 0. 5M must not be used in the context contains a block of frozen soil soil backfill. An indoor room, pit (slots) or not use blocks of frozen soil trench backfill. Backfill should be carried out continuously, prevents Foundation soil or filling soil from the frozen. And shall take prompt measures to antifreeze.5 Quality standards（ 1 ) Ensurance projects1) Base treatment, must comply with the design requirements and specification of construction regulations.2 ) The backfill soil, must comply with the design requirements and specification of construction regulations.3 ) Hierarchical dynamic compaction-compacting backfill is required. Sample determination of dry compacted soil by dynamic compaction and soil mass density, its passing rate should not be less than 90%; not qualified dry density of soil quality the difference between the lowest value and design value should not be greater than 0. 08g/cm3, and should not be set, core cutter method for sampling methods and quantity should be in order. （ 2 ) The tolerance project (see table 1 310 ）Backfill engineering tolerance tables 1 301TimesProjectTolerance ( mm ）Inspection method1Roof elevation 0 50Or cable feet with level checking2Surface roughness202m On foot and wedge feeler gauges check6 Finished product protection（ 1) During construction, should be taken to protect the spud, axial displacement piles, piles, elevation to prevent collisions. （ 2 ) Construction at night, should be reasonable arrangements for construction sequence, equipped with adequate lighting, preventing the spread to fill thick, non-auto dump directly into the tank. （ 3 ) The cast in-place concrete foundations or sewer reaches a certain intensity, not damaged for filling, before backfilling. 7 Quality issues should be paid attention（ 1 ), Lack of soil dry density of soil quality: Shall determination of tamped backfill layer of dry density of soil quality, inspection of its compactness, meet design requirements to casting top soil, test report to indicate the type of soil material, require dry soil mass density, test date, test conclusion and signature of test persons. Does not meet the design requirements of part handling and retest results. （ 2 ) The backfill sunk:due to deficiency of soil exceeding a specified thickness, or in winter with large blocks of frozen soil or tamped not enough times, even ramming spills, pit (slots) down soil organic matter or cleanup does not clean at