The diaphragm wall construction method originated in Europe and was introduced to Taiwan in the 1970s through the BW method applied by Japan’s Tone Drilling Company for the Ronghua Building basement project. This project marked an important milestone in the development of diaphragm wall technology in Taiwan.
Since then, local contractors have progressively adopted various types of excavation equipment and advanced construction techniques. Among them, the MHL (Masago Hydraulic Long bucket) system developed by Japan’s Masago Corporation has become one of the most widely used hydraulic grab systems in the market.
Due to their excellent water-tightness, high rigidity, and inherent safety, diaphragm walls are widely recognized for minimizing ground settlement and reducing the impact on adjacent structures. In addition, diaphragm walls can be incorporated as permanent structural elements. As a result, they are extensively used in building foundations and in major underground works such as urban MRT excavations.