萧山跨湖桥独木舟遗址区的电化学桩加固试验  

Field Experiment Study on Electrochemical Stabilization of Soft Soil in Xiaoshan Canoe Archaeological Site

作　　者：余飞[1] 陈善雄[1] 程昌炳[1] 王小刚[1] 

机构地区：[1]中国科学院武汉岩土力学研究所,武汉430071

出　　处：《土工基础》2010年第2期10-13,共4页Soil Engineering and Foundation

基　　金：国家自然科学基金资助项目(批准号:50609028)

摘　　要：依托古遗址保护工程,开展了软土电化学桩加固现场试验研究,分析了电化学铁质胶结特性和成桩效应,并通过检测对其加固效果以及长期水稳性进行评价。研究表明:金属电极在直流电的作用下发生电解、水解、氧化、脱水等一系列反应后,土体中胶结物含量明显提高,并在电极处形成直径为8 cm^10 cm的圆柱形胶结桩体,离电极10 cm^30 cm的土体强度较加固前显著提高,表明胶结桩体与桩间土已形成桩~土复合地基,地基承载能力和变形模量较加固前提高一倍左右,且胶结桩体具有很好的水稳性和耐酸碱性。Based on the field experiment of electrochemical stabilization by decomposition of steel electrodes（ESDS） in Xiaoshan canoe archaeological site,the electrochemical ferruginous cement characteristic,reinforcement effect and water stability have been studied.The effect of reinforcement and water stability were also evaluated.The analyzed results illustrated that the content of cement compounds in soil increased after the electrolysis,hydrolytic,oxidize and dehydration reactions produced with direct current passing through the electrode-soft system.Around the steel bars,80 mm^100 mm diameter cemented pillars were formed.The soil strength in the stabilized zone with radius of 100 mm^300 mm was obviously increased.The results indicate that the pile and soil composite foundation was formed with cement pile and soil between piles.The foundation bearing capacity and deformation modulu were increased one times by the pile-soil composite foundation.The water stability,acid and alkali resistance of cemented pillars was satisfactory.

关 键 词：电化学桩 软土加固 现场试验 胶结物 

分 类 号：TU473[建筑科学—结构工程]