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1研究背景随着我国建筑工程技术的飞速发展,民用建筑的建设规模越来越大,基础工程中复杂地质条件的情况越来越多,冲孔灌注桩的应用越来越广泛。冲孔灌注桩具有很多优点,它能适用于不同的复杂地质条件,特别在厚度较大的回填石渣层、水下抛石层中有其他桩基无法比拟的优势,冲孔灌注桩是在泥浆护壁的前提条件下,利用桩锤冲进形成桩孔,采用导管法灌注水下混凝土的施工方法。但是,冲孔灌注桩也有一些缺点,冲孔灌注混凝土浇筑都是在水下进行,因而,
1 Background With the rapid development of construction technology in our country, the construction scale of civil buildings is getting larger and larger. The conditions of complex geological conditions in basic engineering are more and more. The application of punched and filled piles is more and more widely. Perforated piles have many advantages, which can be applied to different complex geological conditions, especially in the larger thickness of the backfill gravel layer, underwater pillars have other pile foundation incomparable advantages, perfusion piles in the Under the precondition of mud retaining wall, the pile hole is punched with pile hammer, and the construction method of pouring underwater concrete by the pipe method is adopted. However, perforated cast-in-situ piles also have some disadvantages. Punching and pouring concrete are all poured under water. Therefore,