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水闸结构组合比较复杂,要求地基不但要有足够的承载力,还有抗剪、抗滑、抗渗等方面的要求。水泥土搅拌桩能很好的解决此类问题,因此在水闸基础处理中常用该地基处理方法。鉴于水闸施工实际工况,在实际施工过程中往往在桩头以上预留少则1～2m,多则3、4m的土体做保护层。后期在上部施工时开挖保护层土体将其移置至水闸两侧形成边坡。边坡失稳造成滑坡,在水利工程工程中产生的不良影响并不少见。笔者对边坡稳定性分析计算及水泥土桩体抗剪强度方面计算、比较不做赘述,主要通过部分工程实例,说明边坡失稳对搅拌桩体造成影响及相关预防方法。
Sluice structure combination is more complex, requiring not only sufficient foundation bearing capacity, as well as shear, anti-skid, impermeability and other requirements. Cement-soil mixing pile can solve such problems well, so it is commonly used in foundation treatment of sluice. In view of the actual conditions of sluice construction, in the actual construction process, often reserve as little as 1 ~ 2m above the pile head, as many as 3,4m of soil to make protective layer. Late in the construction of the upper excavation protective layer of soil will be displaced to both sides of the sluice to form a slope. The landslide caused by the instability of the slope is not uncommon in the water conservancy project. The author of the slope stability analysis and calculation of cement-soil pile body shear strength calculation, do not go into details, mainly through some examples of engineering, to explain the slope instability on the mixing pile body and the related prevention methods.