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1 前言粉体喷射搅拌法(简称粉喷法)是将水泥、石灰粉等干粉用压缩空气输送到软土地基中,与地基土强行拌合,使粉料与软土充分发生物理化学反应,形成坚硬、连续、水稳性的柱状体。该技术起源于瑞典,1967年开始研究,1974年取得专利,因以石灰粉为固化材料,故称石灰柱法。相继日本引进这项技术,发展迅速,研制了专用设备,加固深度可达30m、直径0.8～1.0m,广泛用于抗滑、地基加固、护坡等工程,到1985年已加固土方120万m~3。
1 Introduction Powder jet mixing method (abbreviated as powder jet method) is to transport dry powder such as cement and lime powder into soft ground with compressed air, and to forcibly mix with ground soil so that the physical and chemical reactions of powder material and soft soil occur fully. Forms a hard, continuous, water-stable columnar body. The technology originated in Sweden, began research in 1967, patented in 1974, because of the lime powder as a solid material, it is called lime column method. With the introduction of this technology in Japan, it has developed rapidly and developed special equipment with a reinforcement depth of up to 30m and a diameter of 0.8 to 1.0m. It is widely used in anti-slip, ground reinforcement, and slope protection projects. By 1985, 1.2 million m of reinforced earth had been built. 3.