综合精品_淫语对白_亚洲一线二线在线观看_自偷自拍av_女m被主人虐玩调教91_青草精品视频_一乃葵在线_村上里沙在线观看_国产精品刺激_日韩精品视频免费_国产又黄又猛又粗_3d蒂法精品啪啪一区二区免费_日韩一本在线_奇米精品一区二区三区四区_日本三级黄色录像

PDF全文閱讀

魏衍杰¹   ,  魏    平²

( 1 .  巨野縣水務事業發展中心 ， 山東 巨野 274900; 2. 水發規劃設計有限公司 ， 山東 濟南 250100)

摘   要 ：分散性土廣泛分布于我國東北 、西北地區，其具有抗水蝕能力弱 、抗剪強度低 、抗滲性能差等特點 。為了解決分散性土工程性能差的問題，本次研究提出采用木質素磺酸鈣改良分散性土并測定其物理力學性質，探究了不同木鈣摻量以及養護齡期下改性土力學性能變化 。主要結論如下： ( 1) 隨著木鈣摻入量的增加， 土體的液限 、塑限以及最優含水率均出現下降，土樣的破壞模式逐漸過渡至塑性破壞 ；土體抗壓強度先增大后減小 ，壓縮系數先減小后增大 。 (2)  隨著土樣養護齡期的延長，改性土的無側限抗壓強度也逐漸增大，壓縮系  數不斷減小 。 (3)  隨著木鈣摻量的增加，土樣顆粒表面膠結物質逐漸增多，改性土顆粒鑲嵌接觸，接觸面積逐漸增大，同時膠結物包裹顆粒形成大的團聚體，土體結構穩定性較好。

關鍵詞 ：分散性土 ；木質素磺酸鈣 ；物理力學性質 ；養護齡期 ；塑性破壞

中圖分類號 ：TU41           

文獻標志碼 ：A            

文章編號 ：1005- 8249  (2023)   06- 0048- 07

DOI : 10. 19860/j . cnki . issn1005- 8249. 2023 . 06. 008

WEI Yanjie ,  WEI Ping

( 1 . Water Development  Center of Juye ,  Juye 274900 ,   China;   2. Shuifa Planning & Design Co. ，Ltd. ，Jinan 250100 ,  China)

Abstract : Dispersive soil is widely distributed in the northeast and northwest regions of China. It has the characteristics of weak water erosion resistance, low shear strength and poor impermeability. In order to solve the problem of poor engineering performance of dispersive soil, this study proposes to use calcium lignosulfonate to improve dispersive soil and determine its physical and mechanical properties, and explores the changes of mechanical properties of modified soil under different calcium lignosulfonate content and curing age. The main conclusions are as follows : ( 1 ) With the increase of the content of wood calcium, the liquid limit, plastic limit and optimal water content of the soil decreased, and the failure mode of the soil sample gradually transitioned to plastic failure. The compressive strength of the soil increases first and then decreases, and the compression coefficient decreases first and then increases. ( 2 ) With the extension of the curing age of the soil sample, the unconfined compressive strength of the modified soil also increases gradually, and the compression coefficient decreases continuously. ( 3 ) With the increase of the content of wood calcium, the cementing material on the surface of the soil sample particles gradually increases, the modified soil particles are inlaid and contacted, and the contact area gradually increases. At the same time, the cement encapsulates the particles to form large aggregates, and the soil structure is stable.

Keywords : dispersive soil ; calcium lignosulfonate ; physical and mechanical properties ; curing age ; plastic failure

作者簡介 ：魏衍杰  (1969—) ,  男 ，高級工程師 ，主要從事水利工程規劃設計及建設管理。

通信作者 ：魏平  (1987—) ,  男 ，高級工程師 ，主要從事水利工程規劃設計工作。

收稿日期 ：2023- 08-23