新型土工袋挡墙在基坑加固中的应用

Application of new flexible geobag retaining wall in foundation pit reinforcement

地下构筑物施工过程中,已支护的基坑可能会出现局部坍塌,影响地下工程正常施工,带来一定的安全隐患,因此对基坑应急抢险的加固尤为重要。本文以南宁市某基坑支护工程为例,使用新型土工袋堆砌的柔性挡土墙,对土钉墙支护的基坑局部坍塌的位置进行了应急抢险加固处理设计,并对基坑加固段的变形监测数据进行了分析。结果表明:新型土工袋筑成的挡墙具有施工便捷、对周边环境扰动小、造价低、绿色环保等优点,可以有效限制基坑的变形,加固效果良好,可为类似基坑应急抢险加固提供借鉴与参考的价值。

During the construction of underground structures, the supported foundation pit may collapse locally, affecting the normal construction of underground works and bringing certain potential safety hazards.Therefore, the reinforcement of emergency rescue of foundation pit is particularly important.Taking a foundation pit support project in Nanning as an example, using the flexible retaining wall stacked with new geobags, the emergency rescue and reinforcement treatment is designed for the local collapse of the foundation pit supported by soil nailing wall, and the deformation monitoring data of the foundation pit section after reinforcement is analyzed.The results show that the retaining wall built by the new geobag has the advantages of convenient construction, small disturbance to the surrounding environment, low cost and green environmental protection.It can effectively limit the deformation of the foundation pit, and the reinforcement effect is good.It has reference value for the emergency rescue and reinforcement of similar foundation pits.