The document proposes several construction technologies: 1) An aluminium formwork system allows for concrete structures to be poured in a single operation, rapidly constructing buildings while maintaining quality. It requires less skilled labor and heavy machinery. 2) Contiguous bored pile walls can be used for retaining walls and are suitable for restricted worksites like basements. They can support long-term vertical loads in a cost-effective manner. 3) Using both siphonic and conventional roof drainage systems saves costs while achieving efficiency, with siphonic used for its design flexibility and use of environmentally friendly materials.