土钉墙在粘性土基坑支护中的应用

Application of soil-nailing wall in foundation pit-retaining design of cohensive soil

土钉墙指以土钉支护为主,辅以其他各种措施提高土坡稳定性的复合支护形式。在闽东南基坑工程中该支护形式得到了广泛的应用。本文以福州某基坑为例详细介绍了土钉支护形式。文中首先根据基坑的工程地质条件,确定支护形式;其次结合支护设计方案和工程实际,采取相应的施工步骤和措施;最后介绍了施工过程中的监测。结果表明,该工程采用土钉墙的支护方案,既安全又经济合理,施工方便,可以为粘性土基坑边坡的设计与支护提供参考。对于土钉墙在粘性土基坑中的优化有待进一步研究。

Composite soil-nailing wall is a kind of protection structure based on soil nails together with other various measures to improve slope stability. This technology is widely applied in the protection projects in southeast Fujian province. In the process of one Fuzhou project, first, protection structure is selected according to the geoteehnical conditions; second, construction process and measures are designed in accordance with both protection plan and construction conditions; third, monitoring measures during construction are introduced. It has been shown that, the composite soil-nailing protection plan is safe, economic, time-saving, and convenient for construction. This project could be served as a good example for cohesive soil foundation pit-retaining. Further work is required to study the optimization of soil-nailing for cohesive soil foundation pit-retaining.