About the author:

1.Road & Bridge International Co., Ltd., Beijing 100027, China; 2.Road and Bridge NorthEngineering Co., Ltd., Beijing 101100, China

Abstract:

Taking the karst construction project of the JWSG⁃4section of the Jinan⁃Weishan Expresswayas the research object, the construction technology and optimization scheme of rotary drilled grouting pilesare analyzed, and the performance of the pile body is tested by static load tests. The results indicate thatthe average rebound rate of the test pile and the engineering pile of the straight piles is 22.7% and26.9%, respectively. With the increase in the pile top load, the load on the top of the pile shared by Y1and Y2 is also increasing, accounting for 6.3%——25.3% and 6.3 %——22.0%, respectively.