土钉支护结构的现场试验研究

结合某基坑工程土钉支护结构,对土钉支护结构的受力和位移进行了现场监测。通过监测分析发现:基坑边坡自地面至基坑底,位移由大到小,位移速率也由大到小。此外,基坑施工过程中防水措施对基坑稳定性有重要影响。基于现场测试结果,提出了在今后土钉支护结构设计中可以考虑适当降低靠近地表的土钉钉体强度,而靠近基底的土钉长度可以适当减短,同时适当提高强度的建议。

Field Test and Study of Soil Nail Bracing Construction

The forces of the soil nail and the displacement of soil nail bracing construction for some deep foundation engineering had been measured in the site.The analysis of the monitoring data shows that displacement and displacement velocity decrease form the top to bottom of foundation slope and water-resisting measures are very important to the stability of foundation.According to the results of field test,the strength of soil nail closing the top of foundation can been reduced in some degree,at the same time,the strength of soil nail should be increased and the length of soil nail can be decreased closing the bottom of foundation.