Two ash macadam base construction, leveling machine and bulldozer leveling method
Two ash gravel construction: unloading, pushing flat, compaction. 1, after unloading, according to the height of the thickness of bulldozer leveling. In the course of pushing, we should keep the compacted thickness properly (bulldozer itself compaction, grader self compaction, compactor compaction). These three compaction thickness in more than 10 cm (the upper material thickness is about 30--35), push to pay attention to the compaction of the sideline. Each time the material is pushed, the 2--3 shovel is leveled so as to retain the natural compaction. Scraping: scraping 2--3 times, the best results. This construction method and procedure is the experience of construction and summing up for many years, and many methods and experiences can not be expressed in simple language, and can only be carried out in actual construction. The construction method is correct, but the construction schedule and quality are improved greatly, otherwise, the construction schedule and construction quality are affected
4. certificate and test items to be collected(1) material certification should be collected: two ash crushed stone;(2) test test: compaction degree (sand filling method, irrigation method), two lime gravel, lime dosage, two ash crushed stone, unconfined compression. 5. mechanical and manual mechanical consumption type: dump trucks, bulldozers, loaders, graders, vibratory roller, roller, a sprinkler, a ton of mechanical consumption over two ash gravel is divided into two layers: when the bulldozer bottom 5000m2/ team, bulldozer grader 5000m2/ 3000m2/ top team, team roller, 5000m2/ stage, 5000m2/ stage loader, sprinkler pump 40t/. Artificial consumption: 3000 management personnel and technical personnel 2000 days m2/, m2/ days, the bottom two ash gravel 700m2/ days, the top two ash gravel engineering 300m2/ days. 6., quality assurance measures: two gray gravel should be consistent with the "urban road construction and quality acceptance specification" CJJ1-2008, 7.3 and 7.8.1 lime soil base permit. Allowable deviations conform to the provisions of the following table:7. safety measures:1) when the bulldozer, scraper and roller are in the process of shaping and rolling, the personnel keep a safe distance from the machine, so as to avoid bumping.2) construction of bulldozer and roller, facilities on the ground (cable, cable and other pipelines) and underground facilities (cable, cable, cable, telecommunications, gas, tap water and heating pipelines) to establish a clear mark, pay attention to the protection of various facilities, avoid scratching, touch, digging and other phenomena.3) technical personnel in the survey work to avoid the cable tower feet touch the ground, to prevent electric shock accidents.4) non mechanical equipment operators shall not operate on the aircraft.5) the construction of plastic surgery, to all personnel prepared masks and other labor insurance items, to avoid people suffering from respiratory diseases.
1. two ash macadam construction process of lofting, Peilu shoulder, clean road. The sprinkler, transport, two ash gravel hanging line, paving, initial pressure, Dianbu, final pressure, inspection, watering.2. preparation2.1, two ash gravel before paving, should be at the bottom of the appropriate watering, keep wet.2.2 according to the road line, base width, median size and shoulders filling, hanging line construction excavator or artificial earth tank. The soil tank height takes more than two gray gravel virtual height, and the vertical straight cut, which has a certain degree of compaction soil trough, prevent spreading or compacted soil trough will squeeze, two ash gravel material waste.2.3 every 10 meters, vertical curve section longitudinal every 5 meters on both sides of the road to nail vertical side pile measurement in two ash macadam paving process at baseline and review the construction elevation and elevation of loose paving, so as to avoid mistakes.2.4 before unloading, according to the actual measurement of paver thickness and section area calculated base every 10 meters to extend the discharge amount of data will give materials, so that material member can accurately direct discharge to meet the needs of paving, to avoid a scene in the two bad or process is too long to push soil the phenomenon of (material and check the material quantity, time does not appear to measure the phenomenon).The finished materials present two ash gravel mixture basically buy, so when the feed should be timely to the manufacturers for product certification and raw materials two ash gravel lime magnesium content, gravel crushing value and other related test documents. In the process of acceptance on content and content of fly ash mixture containing the check, if the water content and content of fly ash is larger, which will affect subsequent paving, leveling, compaction, impact on the intensity of two ash macadam.
