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1.前言机械成孔泥浆护壁灌注桩是指采用机械钻进、泥浆护壁成孔、清孔后安放钢筋笼、置放导管、灌注水下混凝土成为支承上部结构的桩基。随着现代经济的迅猛发展,我国自30年代引进并发展起来的采用桩基础处理软弱地基的技术已得到了长足的发展,无论从工程桩基的设计、钻孔机械的制造、施工技术的完善等各方面都日臻成熟。其中的采用机
1. INTRODUCTION Mechanical grouting slurry retaining wall cast-in-place grouting pile refers to the use of mechanical drilling, mud retaining wall into a hole, clear hole after the placement of steel cage, catheter placement, perfusion of underwater concrete to become the pile structure supporting the superstructure. With the rapid development of modern economy, the technology of pile foundation treatment of soft foundations, which was introduced and developed in our country in the 1930s, has made considerable progress. No matter from the design of engineering pile foundation, the manufacture of drilling machinery and the improvement of construction technology And other areas are increasingly mature. One of the machines