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 loading after arrangement is finished; step eleven, stopping vacuum loading; step twelve, demounting the vacuum network drainage
system after vacuum loading is finished. By the dissolved gas and
reagent integrated vacuum preloading method, thorough
solid-liquid separation can be realized.