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1)  swelling soil cutting
膨胀土路堑
2)  expansive soil cutting slope
膨胀土路堑边坡
1.
Numerical analysis of expansive soil cutting slope stability in the infiltration of rainwater condition
雨水入渗下膨胀土路堑边坡的稳定性数值分析
3)  expansive soil cut slope
膨胀土堑坡
1.
Effects and correlation analysis of infiltration velocity of expansive soil cut slope
膨胀土堑坡雨水入渗速率的影响因素与相关性分析
4)  expansive soil embankment
膨胀土路堤
1.
n the whole expansive soil embankment,there exist different strength zones due to different water content and dry densitiy caused by the construction course,atmosphere and rainfall.
由于填筑密实度、含水率的差异,整个膨胀土路堤内存在以含水率和干密度为特征的强度分区,且路堤表层土体由于直接受大气、降雨作用,温度、湿度变化频繁,胀缩变形剧烈,裂隙发育,强度将剧烈衰减。
2.
Through centrifuge modelling tests on expansive soil embankment in Nankun Railway,the characteristics of stresssstrain under different conditions are obtained.
本文通过南昆线膨胀土路堤离心模型试验,得出路堤在不同状态下的应力与变形特征,从而可指导现场施工。
5)  swelling soil subgrade
膨胀土路基
1.
Infiltrating properties of modified swelling soil subgrade;
改性膨胀土路基受水特性
2.
Through the site test-road monitoring,indoors modeling test and other technical methods,it proposed a computing theory for the design of the swelling soil subgrade,improved the design methods for the reinforced swelling soil subgrade and developed an economical and proper treatment method for the swelling .
本文系统地研究了公路建设中遇到的膨胀土路基设计与施工等技术问题,通过现场试验路监测、室内大型模拟试验等研究方法,提出了膨胀土路基的设计计算理论,完善了加筋膨胀土路基的设计方法,开发了膨胀土路基经济合理的处治方法,为湖南省膨胀土路基设计和施工技术指南的编写以及相关技术规范的修订提供了科学依据。
6)  expansive soil roadbed
膨胀土路基
1.
Water-destroyed disaster of expansive soil roadbed and it s forecast based on rough neural network;
膨胀土路基水毁灾害及其粗糙神经网络预测
2.
Forecast mode of water-destroyed disaster for expansive soil roadbed
膨胀土路基水毁灾害的预测模型
3.
Connecting with the practice of Xi an-Nanjing railway engineering,and starting from various diseases of the expansive soil roadbed,and according to the engineering features of the expansive soil and the reasons of the diseases,this paper puts forward some measures and methods for preventing these.
结合西安南京铁路工程实践,从膨胀土路基出现的各类病害入手,根据膨胀土的工程特性及其病害产生的原因,提出了病害防治的措施及处理方法。
补充资料:膨胀土
      以粘土矿物为主要成分、对湿热环境变化敏感的高塑性粘土。膨胀土分布极广。多生成于盆地的边缘、谷地的高阶地。多属更新世。可有各种地质成因类型。主要特点是:①粒度组成中,粘粒含量大于30%。②粘土矿物以蒙脱石、伊利石等强亲水性矿物为主。③土体湿度增高时,体积膨胀,形成膨胀压力;土体干燥时,体积收缩,形成收缩裂缝。④膨胀、收缩随环境变化可往复发生,导致强度衰减。⑤属液限大于40%的高塑性粘土(见图)。⑥属固结性粘土。
  
  膨胀土的膨胀和收缩性常用膨胀压力、膨胀率、体缩和线缩率等指标表示。膨胀压力是土样在无侧向膨胀条件下湿化,控制膨胀变形为零时所需的压力。膨胀率则表示膨胀体积的百分率。体缩和线缩表示土样干燥前后,体变和线性变化的百分率。膨胀土易被误认为是工程地质性质较好的土,但实际上膨胀土易随湿热环境变化,产生体积变形而导致建筑物变形破坏。膨胀土由于干燥或其他原因常形成裂隙,裂隙面光滑,间而有次生土质充填,故而又称为裂隙土。常是控制边坡稳定的重要因素。
  

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