Zhuhai HongHe bridge traffic group co. , LTD. , spread the good news, the target segment last root pile foundation was completed, perfusion. This project is not only a bridge across the first complete blocks of pile foundation construction, and is one of the biggest blocks of pile foundation construction technical difficulty. Its innovative USES reverse circulation drill technology such as cracking cave, will bid for the subsequent HongHe bridge under special geological conditions of bridge construction and zhuhai accumulated valuable experience. HongHe bridge rendering HongHe bridge blocks by China railway DaQiaoJu construction, 2 meters, including half hongwan channel main channel bridge and half the modaomen waterway main channel bridge, a bridge pier. Block the pile foundation engineering of the main pier pile foundation and root auxiliary, transition pier pile foundation, were holing rock-socketed pile. According to chief engineer Yang Bincai HongHe bridge co. , LTD. , although blocks the total length is not long, but on the pile foundation construction is the highest of all the most challenging and difficult. Assignment to the complex geological condition on site, the root pile foundation are cave, accounting for the total number of pile foundation. %; Single pile deep cave number and position, beaded, single pile cave, even up to layer, maximum drilling depth of pile foundation is meters; Rock drill depth is big, the biggest rock drill depth. M, and rock strength is high. In such complex geologic condition, engineering technical personnel of the existing construction experience at home and abroad for reference, and equipment, innovative reverse circulation drill is adopted to improve the karst cave. 'Reverse circulation drill with the function of the cyclotron, can form a small plane, in the impact, in turn, improve the efficiency of pore forming, is not easy to sticking, cave environment construction is a valuable experience. 'Yang Bincai is introduced, in addition to the breakthroughs in construction technology, construction of the application of advanced' spin dig drill + abrasion drill 'portfolio construction process, the equipment is not only the world's leading, less use in China. Formally began at the end of the block, to date the first main pier pile foundation drilling, opened, the pile foundation engineering construction over the past year, the construction unit through difficulties, 'seeks the measures, cut from fine, fine' as the project's construction idea and culture. After the completion of the pile foundation construction, a block will continue this idea to complete the cofferdam and the construction of pile caps.