Diaphragm walls using trench cutter in confined space-Paper 2

Paper 2

Pdf Summary

The paper examines how diaphragm wall construction can address the growing demand for underground infrastructure in increasingly crowded cities. Urbanization, limited surface space, existing structures and environmental concerns are driving projects toward greater depths and more challenging ground conditions.<br /><br />Successful work in confined sites depends on detailed, site-specific planning. Teams must coordinate construction stages, equipment and storage locations, material handling, access routes and utilities, while tracking changes and adjusting schedules as conditions evolve. The typical sequence includes site preparation, guide-wall construction, pre-excavation, panel excavation and cleaning, reinforcement installation, and concreting. In tight spaces, auxiliary equipment may be needed to handle reinforcement cages.<br /><br />Real-time monitoring and data transfer are increasingly important for quality assurance and production control. Operators can monitor excavation-tool movement and operating parameters, while connected systems can share machine and production data, support concrete-flow control, and improve reporting and future planning.<br /><br />Equipment can be adapted to restricted headroom or narrow working areas using compact carriers, specialized tools and turning devices. The paper illustrates these approaches through projects in Hong Kong, Paris and Germany. At Hung Hom Station, low-headroom machines installed deep panels among existing columns and in hard rock. Paris projects used specialized carriers and a compact cutter to work beneath a bridge and within a narrow site. At the Rosshaupten dam, standard-sized equipment and carefully planned movements enabled cutoff-wall construction from a narrow crest.<br /><br />The authors conclude that diaphragm walling is suited to a wide range of soils and confined conditions. Further advances are expected in machine capability and in reducing noise and emissions, strengthening the method’s role in future urban infrastructure.

Keywords

diaphragm wall

underground infrastructure

urbanization

confined construction sites

site-specific planning

real-time monitoring

excavation equipment

reinforcement cages

low-headroom machinery

urban infrastructure