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在短时间内以最小的扰动控制由于相邻基坑开挖引起的周边建筑物沉降是基坑周围环境保护首要解决的问题之一。介绍了一个减小基坑开挖对周围环境的影响实例,案例中对房屋基础采用改性聚酯注浆进行主动加固,设置隔离桩,在被动区压密注浆,增加浅层地基的承载能力和抗变形能力,减少基坑开挖对房屋的影响。改性聚酯注浆已被国内外广泛用作改善浅层地基和提升地面结构的有效方法。详细介绍了使用改性聚酯注浆材料的特点和采用该工艺进行房屋基础加固和沉降控制的关键技术。案例中,建筑物距离基坑开挖边线最近仅1.3 m,在不同阶段采用了改性聚酯注浆和跟踪注浆,提高了地基承载能力和变形能力。监测结果显示,房屋加固效果良好,沉降得到了有效控制。
In a short time, controlling the surrounding building settlement due to the excavation of neighboring foundation pits with the minimum disturbance is one of the issues to be solved in the environmental protection around the foundation pit. Introduced an example of reducing the influence of excavation of excavation on the surrounding environment. In the case, active reinforcement of the housing foundation with modified polyester grouting was carried out. Isolated piles were installed, and grouting was compacted in the passive area to increase the bearing capacity of the shallow foundation. Ability and resistance to deformation, to reduce the impact of pit excavation on the house. Modified polyester grouting has been widely used at home and abroad as an effective method to improve the shallow foundation and enhance the ground structure. The characteristics of the use of modified polyester grouting material and the key technologies for the use of this process for the reinforcement and settlement control of the building foundation are described in detail. In the case, the building was only 1.3 m away from the excavation line of the foundation pit. Modified polyester grouting and tracking grouting were used at different stages to improve the foundation’s bearing capacity and deformation capability. The monitoring results show that the reinforcement effect of the house is good and settlement has been effectively controlled.