884aa四虎影成人精品,99久久国产综合精品女图图等你,97在线观看永久免费视频,久久精品国产精品亚洲38,ⅵdeodesetv性欧美

(湘潭大學土木工程與力學學院，湘潭 411105)

［摘要］將水泥土攪拌樁支護結(jié)構(gòu)及土體視為共同變形的整體，建立了三維有限元模型，選用 Drucker-Prager本構(gòu)模型及非線性增量迭代法，以泉州某基坑為工程原型，利用ANSYS工程計算軟件，進行了模型驗證，并詳細討論了各支護參數(shù)變化時水泥土攪拌樁的位移、應(yīng)力分布。揭示了地面堆載、墻體厚度、不同土層性質(zhì)及其分布對攪拌樁位移、應(yīng)力的影響，墻體位移和應(yīng)力的關(guān)系，分步開挖對攪拌樁位移的影響及合理布置開挖步需考慮的因素。

［關(guān)鍵詞］攪拌樁；有限元；位移；應(yīng)力；支護參數(shù)；土質(zhì)

Study on behavior of soil-cement mixing piles of support structure considering  soil layers

 Qu Changzi, Ma Shicheng

 (Civil Engineering and Mechanics Department, Xiangtan University, Xiangtan 411105, China)

Abstract:Regarding the soil-cement mixing piles support construct and soil as a whole and taking a foundation pit of engineering in Quanzhou as an example, a 3-D finite element model is established, and Drucker-Prager structural model and nonlinear iterative method are adopted. By using ANSYS software, the validity of the established model is verified, and the displacement and stress distributing of soilcement mixing piles while several support factors changing are discussed in detail. The effect of factors including stacked load, breadth of mixing piles wall, different soil layer character, soil layer distributing and stepwise digging on the displacement and stress distributing of soil-cement mixing piles are analyzed, and the factors which should be considered while fixing digging times reasonably are presented.

Keywords:soil-cement mixing piles; finite element method; displacement; stress; support factors; soil character

*自然科學基金項目(50678177)。