钢板桩土石围堰在钦州青年水闸加固工程中的应用

Application of steel sheet pile earth-rock cofferdam in Qingnian Sluice Project

广西北部湾沿海地区,地表以下大都存在一道强透水~中等透水的砾砂层,厚度在1~5 m,在该地区进行围堰基础防渗施工时,通常的做法是采用水泥灌浆技术进行基础防渗。但由于砾砂层的透水性特征,灌浆往往在流水条件下进行,灌浆体成墙时间久,灌浆效果难以保证,而且对环境造成一定污染。介绍了钢板桩作为土石围堰防渗体在钦州市青年水闸除险加固工程中设计、施工的方法和经验。

There exists a intensely - moderately permeable sand gravel layer below the surface with a thickness vari- able within 1m-5m in the Beibu Gulf coastal area of Guangxi. Cement grouting is the common practice for cofferdam foundation seepage prevention. Due to the permeability characteristics of sand gravel layer in this region, grouting is often carried out under flow condition, which leads to the formation of grouting wall requires a long time, the grouting effect is difficult to guarantee, and renders certain pollution to the environment. An introduction was made on the application of steel sheet pile as the earth-rock cofferdam anti-seepage body in Qingnian Sluice Project in Qinzhou City, including the design and the construction methods and experience.