Anhui Brunch of Nanjing R&D Tech Group Co., Ltd. undertakes the pile pulling of the pouring piles in the Nanhu Connecting Channel in No. 7 Work Area of No. 1 Bid Section of Lane 3 Rail Transit Engineering in Nanning, a transformation project of the scientific achievements of NHRI Materials and Structural Engineering Department. By overcoming unfavorable factors and difficulties such as complex engineering geological conditions, strong connection between pouring piles and concrete channel walls, tight schedule of in-situ construction, overtime work during the Chinese Spring Festival, etc., the Brunch has made a breakthrough in pulling out 8 pouring piles till Apr. 6^th, 2017, which is highly recognized by Nanning Rail Transit Co., Ltd. and the general contractor China Railway 16^th Bureau Group Co., Ltd.

The project integrated the techniques of drawing prestressed anchor cables, eliminating frictional resistance around piles and strong connection, and fast assembly of reaction system with construction method of pressure balance of earth surrounding piles. The successful execution of the project pioneered the special construction field in municipal subway engineering for NHRI, and filled the technical gaps in domestic market. 5 national invention patents and 6 utility model patents have been declared, and 1 industry construction method compiled.