高速公路粉喷桩复合地基的现场试验研究

Field Experimental Study on Compound Foundation of Dry Jet Mixing Pile in Highway

在申苏浙皖高速公路(浙江段)湖州-姚家桥段粉喷桩复合地基选取了K0+850断面,埋设了大量的相关测试仪器,在路堤填筑和预压期间对地表沉降、分层沉降、深层沉降、水平位移、孔隙水压力和桩土应力比进行了试验研究,分析了粉喷桩作用机理及其处理效果,得出了对设计和施工有重要指导意义的结论。

Profile K0 ＋ 850 was selected as a experimental site in Huzhou-Yaojia bridge section of Shen-SuZhe-Wan Highway. By burying essential observation instnnnents in it, settlements of ground surface, shallow layers and deep layer, horizontal movements of soils, pressure of water, soils and dry jet mixing piles were observed during the filling and preload on the foundation. Mechanism and effect of dry jet mixing piles in highway was studied, and some conclusion of import guidance for design and construction was drawn out.