Research on pile foundation underpinning schemes of Xima Bridge of Fuzhou subway

Combining with the factual circumstance of the pile foundation underpinning of Xima Bridge in Fuzhou subway,the paper compares and analyzes the costs and technical difficulties of various schemes,identifies the suitable underpinning of the project and the pile removing technical scheme,and points out the respective auxiliary construction technique,and provides certain direction for the smooth construction,so as to reduce the social influence,shorten the construction period and lower the engineering costs.