软土地区基坑施工对堤防稳定性影响的控制措施

随着中国基础设施的大规模建设,遇到了越来越多的基坑施工对临近建筑物影响的问题。对于软土地区的基坑而言,由于土体力学参数较低,基坑施工对临近建筑物的影响更加严重。结合某实际工程,以数值分析为主要手段,研究软土地区基坑施工对其附近土堤稳定性的影响,并重点对基坑施工影响的控制措施进行了研究。结果表明:软土地区基坑开挖的影响范围明显大于经验值,需采用合理的支护措施,以控制其对临近建筑物的影响。仅采用钢板桩支护并不能有效地控制基坑开挖对周围土体的扰动,需要在钢板桩内部增加1～2层内支撑,以保障临近建筑物的安全。研究成果可为类似的软土地区基坑工程施工影响问题提供参考。

Study on Control Measures of Influence of Foundation Pit Construction on Stability of Soil Embankment in Soft Soil Area

With the large-scale construction of infrastructure in China, more and more problems about the impact of foundation pit construction on nearby buildings have been encountered. For the foundation pit in soft soil area, the influence of foundation pit construction on adjacent buildings is more serious due to the low mechanical parameters of soil. Combined with a practical project, the influence of foundation pit construction in soft soil area on the stability of soil embankment nearby is studied by using numerical analysis, and the control measures for the influence of foundation pit construction are studied. The results show that the area of influence of foundation pit excavation in soft soil area is obviously larger than that of empirical value. Reasonable supporting measures should be adopted to control the influence of foundation pit excavation on adjacent buildings. Steel sheet pile support alone can not effectively control the disturbance of surrounding soil caused by foundation pit excavation. Therefore, it is necessary to add 1 to 2 internal supports in steel sheet pile to ensure the safety of adjacent buildings. The research results in this paper can provide a reference for similar problems of influence of foundation pit construction in soft soil area.