- 摘 要
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(1 長安大學建筑工程學院， 西安 710061； 2 陜西省建筑設(shè)計研究院有限責任公司， 西安 710018)
［摘要］為了改善傳統(tǒng)生土材料的力學性能和耐久性能，對摻加一定比例水泥、石灰、砂子、麥秸稈等摻料的干燥改性生土試塊進行直接剪切試驗，得到改性生土試塊的破壞形態(tài)、破壞過程、剪應(yīng)力-剪切位移關(guān)系曲線、抗剪強度與垂直壓力的關(guān)系曲線以及受剪極限承載力；對比分析摻加不同改性材料以及同種材料不同比例對生土塊材的強度和變形性能的影響規(guī)律，研究各種摻料對生土塊材性能產(chǎn)生影響的機理；設(shè)計專門用于研究生土塊材抗剪性能的推剪試驗，探索能正確反映生土結(jié)構(gòu)中土體抗剪性能的試驗方法。
［關(guān)鍵詞］改性摻料； 干生土塊材； 抗剪性能； 直接剪切試驗； 推剪試驗
中圖分類號：TU361文獻標識碼：A文章編號：1002-848X(2016)15-0106-04
Experimental study on shear properties of modified raw-soil bulks
Zhong Jiqing1， Wang Yihong1， Liu Qiji1， Yue Xingchao2
(1 School of Civil Engineering, Chang′an University，Xi′an 710061, China;2 Shaanxi Architectural Design and Research Institute Co., Ltd., Xi′an 710018, China)
Abstract:In order to improve the mechanical properties and durability of traditional raw-soil materials, the direct shear tests on dry modified raw-soil specimens adding cement, lime, sand and wheat straw in proportion were carried out. The failure mode, failure process, the curve of shear stress and shear displacement, the curve of shear strength and vertical pressure, and ultimate shear capacity of modified raw-soil specimens were obtained. The influence laws of different modified admixture or same admixture in different proportions on the strength and deformation performance of raw-soil bulk were compared and analyzed, meanwhile the influence mechanism of all admixtures on raw-soil bulk performance was studied. Push-shear test was designed specifically for studying shear properties of raw-soil bulk to explore an appropriate test methodology that can accurately reflect shearing properties of raw-soil structure.
Keywords:modification admixture; dry raw-soil bulk; shear property; direct shear test; push-shear test
*“十二五”國家科技支撐計劃課題（2014BAL06B04）。
作者簡介：仲繼清，博士研究生，Email：275875497@qq.com。
