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从1961年下半年开始,在北京郊区的农业打井造孔施工中,推广使用了清水固壁和抽筒钻具相结合的快速造孔方法。黄壁庄水库混凝土桩柱防渗墙利用清水固壁造孔的试验也已成功。实践证明,在一定条件下清水固壁是可行的、经济的,它具有进度快、工效高、工序少、设备少、成本低等优点。液体固壁用的液体除清水外,还有用泥浆固壁的,各有其不同的特点。如何正确地、合理地根据客观情况选择固壁用液体对进行冲击造孔的关系很大。在正确合理地选择固壁用液体之前,必须首先明确地认识两种主要固壁用液体各自的优缺点。清水固壁和泥浆固壁的优缺点对比列如表1。
From the second half of 1961, in the construction of agricultural wells in the suburbs of Beijing, the rapid method of making holes by the combination of clean water solid wall and a barrel drill was promoted. The experiment of using Huangshizhuang Reservoir Concrete Pillar Impervious Wall to make holes by using water solid wall has also been successful. Practice has proved that, under certain conditions, solid-wall water is feasible and economical, it has the advantages of fast progress, high efficiency, fewer processes, less equipment, low cost. In addition to solid liquid liquid wall with water, there are solid walls with mud, each with its own different characteristics. How to correctly and reasonably choose the solid wall liquid to make a great impact on the impact of the hole-making according to the objective situation. Before choosing the solid wall liquid correctly and reasonably, we must first understand the advantages and disadvantages of each of the two main solid wall liquids. The advantages and disadvantages of solid-wall and solid-wall of water are listed in Table 1.