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杭州湾跨海大桥北航道桥主墩桩基础施工过程中,由于钢护筒底口软弱土体的扰动、微承压水以及潮涨潮落的反复作用,引起桩基塌孔和串孔漏浆,在事故处理中采用单管高压旋喷施工对周围软弱土体进行加固,主要介绍加固施工工艺。
During the construction of the main pier of the North Channel Bridge of the Hangzhou Bay Sea-Crossing Bridge, due to the disturbance of weak soil at the bottom of the steel tubular casing, the repeated action of micro-pressure water and tidal ebb and flow, pile collapse and string leakage In the accident treatment, single-tube high-pressure rotary jet grouting is used to reinforce the surrounding soft soil, mainly introducing reinforcement construction technology.