Research Of Deep Foundation Top-Down Construction Technology

There are many countries to research technologies in the Top-Down construction design's theory and construction technology. In the project application a lot of countries or states such as Japan USA U.K. France Germany and Taiwan zone apply technology. It is very effective to utilizing Top-Down construction to dig underground multistory structure. Top-Down technique theory is construction underground wall or continuous concrete wall along construction axes or outside. At the same time in the construct inner location (pillar or partition intersect place that need calculate to ensure) construct or hit midway supporting columniation picket endure upside structure deadweight and construct load in the construction back cover period.This article aimed at idiographic project example. The project locates city center and not only condition complex but also construct site very narrow. The high-rise build possesses three layers'basement and deep foundation pit. The scheduled time should be requested urgently. We adopt strongpoint in the several cases. This occlude connecting pouring of concrete pile and high pressure revolve grouting pile system to seal water and to retaining soil. The annex beam and floor used for supporting. The pile fencing should be not only separated subsurface structure but also set up supporting. We construct first underground beam and floor in advance to ensure supporting system safely and construction excellent. The working procedure combines fluently and the scheduled time be cut in reason. The most limitedly reduce ties miss time and waiting and can ensure construction concision economy shortcut.We carry out information construction to arrange excavation. Step by step and subsection control distortion and displacement. It is a example in our country that project use this technologies. We combine with this project to carry out bold innovation and experiment.