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近年来,在工业发达国家生产的钻机上广泛采用高强合金材料,液压传动系统,电子控制、超声波监测等新技术。在工艺上采用特型钻头强压钻进,压缩空气配合反循环水排渣,尤其对稳定溶液静水压力固壁的研究有了新的成就,解决了复杂地质中防止坍孔的问题,致使大口径深钻进的钻孔椿工程取得了进度快、质量高、成本低的进展。五十年代起,钻孔椿工艺向地下帷幕墙方向发展,现在国外帷幕墙已广泛应用于地下铁道、地下公用和民用建筑、水坝截流、码头岸壁等工程。日本三井物产公司所属利根钻探有限公司(Tone Boring Co LTD)所创立的BW工法施工的椿和帷幕墙的质量和精度得到较高的评价。所以将该工法的技术资料“用于帷幕墙的稳定溶液”摘译出。本文对于我们改进钻孔椿和帷幕工艺有一定的参考。
In recent years, widely used high-strength alloy materials, hydraulic transmission systems, electronic control, ultrasonic monitoring and other new technologies on rigs produced in industrialized countries. In the process of using special drill forced drilling, compressed air with reverse circulating water slag, in particular, the stability of the hydrostatic pressure wall solidification research has new achievements to solve the problem of preventing collapse in complex geology, resulting in large diameter Drilling Deep Drilling Engineering has achieved progress, high quality, low cost progress. Since the 1950s, the technology of drilling piles has been developed to the underground curtain wall. Now foreign curtain walls have been widely used in underground railway, underground public buildings and civil buildings, dam interceptions, quayside and other projects. The quality and accuracy of the piles and curtain walls constructed by the BW construction method established by Tone Boring Co LTD, a subsidiary of Mitsui & Co., Ltd. of Japan, were highly evaluated. Therefore, the method of technical information “for curtain wall stability solution” extracted. This article has some reference to the improvement of drilling and curtain technology.