Dissolved gas and reagent integrated vacuum preloading method

The invention provides a dissolved gas and reagent integrated vacuum preloading method. The method includes steps: step one, sampling engineering waste slurry on site; step two, determining chemical reagents, dissolved gas and the like according to analysis results acquired at the step one; step three, designing a waste slurry settling tank and the like; step four, feeding the waste slurry into the settling tank to a certain height through a pumping pipe; step five, sequentially feeding the chemical reagents and the like into the settling tank through the pumping pipe; step six, feeding the dissolved gas into the waste slurry through a gas adding device and a gas injection pipe; step seven, standing a waste slurry mixture with the chemical reagents; step eight, arranging transverse drainage pipes and vertical drainage pipes in a separation tank; step nine, using a pump for pumping precipitations into a solid-liquid separation tank with a vacuum network drainage system; step ten, step ten, starting vacuum load