It can improve gas suction effect, reduce drilling hole amount and save construction investment.
采用优化后的方法可以提高瓦斯抽放效果，减少钻孔数量从而节省施工投入。
Compared with ordinary concrete caisson pile, the technology may save investment and construction period greatly, and the economic benefit is notable.
与普通混凝土灌注桩相比，该技术可节约大量资金，缩短工期，经济效益十分显著。
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