杭州三堡排涝工程高压旋喷桩抗冲刷性研究

Scour Resistance of High Pressure Jet Grouting Pile in Sanbao Drainage Project in Hangzhou

杭州三堡排涝工程区域土质为软弱原状砂质粉土,需采用高压旋喷桩方案处理地基。同时工程位于京杭大运河的起点,水流速度需满足通航要求。【目的】分析杭州三堡排涝工程高压旋喷桩抗冲刷性能。【方法】通过该地质条件下,采用人工制作试件和现场取样试件2种方式,对平冲工况、斜冲工况和斜冲破坏性工况进行相关试验。【结果】该桩基在连续冲刷一定时间后,试件累计损失很小,且表面无明显破坏。【结论】杭州三堡排涝工程高压旋喷桩抗冲刷性能良好。

The soil quality of Sanbao drainage project in Hangzhou is soft and sandy silty soil,and the high pressure jet grouting pile should be used to deal with the foundation.At the same time,the project is located at the starting point of the Grande Canale in JingHang,and the flow speed needs to meet the navigation requirements.【Objective】Analyse the scour resistance of high pressure jet grouting pile in sanbao drainage project.【Method】Under the geological conditions,the two tests were done on the basis of manual test and field sampling,and the relevant tests were carried out for flat and punching,diagonal and diagonal failure.【Result】After a certain time of continuous erosion,the cumulative loss of the pile was very small,and the surface was not obviously damaged.【Conclusion】There is a good scour resistance of high pressure jet grouting pile in Sanbao drainage project..