For the foundation and bottom layer of multi-storey buildings, there shall be no more than two groups According to different cement varieties, cement delivery date, mortar, concrete characteristics, strength grade and building parts, mix proportion of cement: 1 bag of gravel: 150kg sand: 60kg mortar mix proportion of cement: 20kg sand: 40kg remarks: when the composition of concrete and mortar is changed, mix proportion of sand and gravel shall be determined again: 400m3 or 600t of the same origin and specification For acceptance batch, less than 400m3 or 600t is also a batch
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10% of the total number of column bases shall be selected, but not less than 5 foundation trench and pipe trench backfills shall be selected
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test data soil: it is divided into original soil test, soil compaction test and ring knife sampling for filling engineering
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Field leveling filling: one group of 400-900m2 long but not less than one group shall be sampled for each layer Less than one group (3) of foundation pit and indoor backfill: take a group of 100 ~ 500m2 but not less than one group (3) of soil quality, and take 20kg of each soil sample
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For stones, approximately equal 15 samples were taken from each part (five different parts were evenly distributed at the top, middle and bottom of the pile) to form a group of samples.
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Foundation beam (construction survey and setting out, reinforcement processing, reinforcement installation, formwork installation, opening appraisal, concrete construction, mix proportion and raw materials, formwork removal) 7
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Project commencement report, construction permit, construction organization design, material and equipment approval
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4
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For each manufacturer, at least one group of small hollow concrete blocks shall be randomly inspected for every 10000 hollow bricks
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Construction organization design, construction scheme and construction inspection batch approval sequence 1
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First floor beam slab stairs (construction survey and setting out, reinforcement processing, reinforcement installation, formwork installation, opening appraisal, concrete construction, mix proportion and raw materials, formwork removal) 10
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Foundation backfill (earthwork backfill inspection lot) 8
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One group of 20-50m long but not less than one group (3) shall be sampled for each layer
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Post pouring belt (formwork installation, opening appraisal, concrete construction, mix proportion and raw materials, formwork removal) experiment Laboratory data I
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Construction drawing review (construction drawing review certificate) 5
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Geological survey documents 6
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2
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Qualification contract of subcontractor 4
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Acceptance of construction site
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When sampling on the pile, the sampling position should be evenly distributed
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Stretching: two 40cm bending: two 15cm5d carbon structural steel and low alloy high strength steel with the same grade, grade, variety, size and delivery state of no more than 60t are the same batch; cold rolled ribbed steel with the same grade, specification, shape, production process and delivery state of no more than 60t are the same batch Two in each batch shall be inspected, one in each batch shall be tensile test, 300 joints of the same grade and diameter completed by the same welder in the same shift shall be tensile test, three 40cm bending joints, three 15cm5d joints shall be sampled, if the welding quantity is small in the same shift, it shall be accumulated within one week, if the accumulated quantity is still less than 300 joints, it shall be arc welded according to one batch of steel bars For the same type of joint, no more than 300 joints shall be regarded as one batch; for the three 40cm steel bars in the building structure, no more than 300 joints of the same grade in the second floor shall be regarded as one batch; for the less than 300 steel bars, electroslag pressure welding shall be regarded as one batch; for the building structure, no more than 300 joints of the same grade in the second floor shall be regarded as one batch; for the less than 300 steel bars, no more than 300 joints shall be regarded as one batch Mechanical connection: the same construction conditions, the same batch of materials, the same grade, the same type, the same specification of no more than 500 joints as a batch (site installation of less than 500 on the same floor is still a batch) ordinary brick, hollow brick, aerated block: sintering ordinary brick of the same manufacturer, the same specification of 35000 ~ 150000 pieces as a batch, less than 35000 pieces also according to a batch of random sampling method from the appearance 12 hollow bricks shall be selected from each batch of samples with qualified quality and dimension deviation
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Temporary facilities (scheme), safety and civilized construction preparation
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Engineering survey positioning record 2
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Cement and fly ash: cement of the same manufacturer, same grade, same variety, same batch number and continuously entering the site shall be taken as one batch if the bag size is not more than 200t and bulk size is not more than 500t, and each batch shall be sampled at least once
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Foundation trench inspection record 4
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Concrete mix design and material inspection
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Quality responsibility system list 2
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Operation certificates of main professional types of work (tower crane, scaffolder, gantry, electric welder, butt welding) 3
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Cushion (template installation and opening) Appraisal, concrete construction, mix proportion and raw materials, formwork removal) 6
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For bagged cement, 20 bags of cement shall be sampled at different points, each bag shall not be less than 0.5kg, and the cumulative sampling shall not be less than 12kg; for bulk cement, one vehicle shall be taken as one sampling point, and each sampling point shall not be less than 1kg, The cumulative sampling shall not be less than 12kg fly ash, and the 200t fly ash continuously supplied with the same grade shall be taken as a batch, and 8kg steel materials shall be taken each time: the same brand of reinforced concrete hot-rolled ribbed bar and round bar, and the same specification no more than 60t shall be taken as a batch, and two steel bars shall be selected from each batch
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Earthwork excavation inspection batch 3
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For the same manufacturer, 35000-150000 hollow bricks of the same specification shall be taken as a batch
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Then, for the sand, 8 equal samples were taken from each part to form a group of samples
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Foundation Treatment Inspection batch record 5
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The ring knife sampling part shall be backfilled at the lower part of the column base after each layer is compacted
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Remove the surface layer of the sampling part before sampling
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First floor column (construction survey and setting out, reinforcement processing, reinforcement installation, formwork installation Opening appraisal, concrete construction, mix proportion and raw materials, formwork removal) 9
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For those with less than 35000 hollow bricks, 50000 hollow bricks from the same manufacturer shall be taken as a batch
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Engineering survey positioning records should be prepared: basic information sheet of construction engineering, construction approval materials (vertical approval from the construction unit), planning license of Construction Engineering (planning license from the construction unit), letter of acceptance of Construction Engineering (letter of acceptance from the construction unit), construction contract (construction contract from the construction unit) supervision contract (the supervision contract required from the supervision unit) copies of the qualification of the construction unit, the personnel certificate, the qualification of the project supervision organization and the relevant certificates, the qualification of the design unit, the qualification of the personnel certificate, the qualification of the survey unit, the copy of the personnel certificate, the copy of the project construction organization and the relevant certificates (including the qualification certificate, the personnel employment certificate (constructor, budgeter, quality inspector, safety officer, material inspector) Drawing joint review records and design change documents of construction site quality management inspection records and attached table 1
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3
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Source: Construction Management mobilization preparation 1
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When there is doubt about the quality of cement in use or ordinary portland cement has been out of the factory for more than three months, it must be re sampled
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