[1]张彧,罗阳,徐安花,等.含水量与抗剪强度关系影响下高盐量盐渍土路基边坡稳定性[J].长安大学学报(自然科学版),2020,40(3):22-32.
　ZHANG Yu,LUO Yang,XU An hua,et al.Stability of high salinity saline soil subgrade slope under influence ofwater content and shear strength[J].Journal of Chang’an University (Natural Science Edition),2020,40(3):22-32.
点击复制

含水量与抗剪强度关系影响下高盐量盐渍土路基边坡稳定性()
分享到：

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

卷:
第40卷
期数:
2020年3期
页码:
22-32
栏目:
道路工程
出版日期:
2020-05-15

文章信息/Info

Title:
Stability of high salinity saline soil subgrade slope under influence ofwater content and shear strength
作者:
张彧; 罗阳; 徐安花; 房建宏
（1. 青海省交通科学研究院，青海 西宁 810001； 2. 兰州交通大学 交通运输学院，甘肃 兰州 730070；3. 青海交通职业技术学院，青海 西宁 810003）
Author(s):
ZHANG Yu1; 2;  LUO Yang2;  XU Anhua3;  FANG Jianhong1
（1. Qinghai Transportation Research Institute, Xining 810001, Qinghai, China; 2. School of Traffic andTransportation, Lanzhou Jiaotong University, Lanzhou 730070, Gansu, China; 3. Qinghai CommunicationsTechnical College, Xining 810003, Qinghai, China）
关键词:
道路工程; 盐渍土; 边坡稳定性; 含水量强度参数等值分层
Keywords:
road engineering;  saline soil;  slope stability;  water contentstrength parameter equivalent layering
文献标志码:
A
摘要:
针对盐渍土中不同盐分类型的溶解度和亲水性差异较大问题，分析高盐量盐渍土含水量与抗剪强度关系变化对盐渍土路基边坡稳定性的影响。结合降雨量调查和现场含水量沿深度分布情况，开展适应环境条件的室内试验。针对不同含水量条件下高氯盐渍土（CL1）和高硫低氯盐渍土（CL2）路基填料进行直剪试验，得出含水量与抗剪强度参数关系函数。基于Geostudio建立盐渍土路基含水量强度参数等值分层计算模型，通过体积压力板仪试验测量土样基质吸力随体积含水量的变化规律。通过采用饱和/非饱和渗流的有限元分析与路基边坡稳定性的极限平衡分析相结合的方法，利用GeoStudio中SLOPE/W模块，分别计算和分析降雨强度、降雨持续时间等对盐渍土路基边坡稳定性的影响。考虑含水量和抗剪强度变化关系函数，通过建立的盐渍土路基含水量强度参数等值分层计算模型对CL1和CL2盐渍土边坡稳定性进行了分析。结果表明：含水量在最优含水量的基础上增加3%时，CL1和CL2的黏聚力较最优含水量时分别下降94.3%和54.0%，内摩擦角的变化不大；在最优含水量的基础上减少3%时，CL1和CL2的黏聚力较最优含水量时分别提高了277.1%和89.7%，对CL2的内摩擦角影响不大，CL1的内摩擦角出现明显减小；当降雨强度相同时，CL1填筑的路基的安全系数较CL2填筑的路基变化更为明显，主要原因在于高氯盐的亲水性较硫酸盐强，抗剪强度参数受到水分变化的影响更大。
Abstract:
Amid at the solubility and hydrophilicity of different salinity types in saline soils were quite different, the influence of the relationships between the water content and shear strength of saline soils on the stability of saline soil roadbed slopes were analyzed, combined with the rainfall survey and the depth distribution of the onsite moisture, the indoor test adapted to the environmental conditions was carried out. Direct shear tests were performed on the highchlorine saline soil (CL1) and highsulfur lowchlorine saline soil (CL2) under different water content conditions, and the relationships between water content and shear strength parameters were obtained. Based on Geostudio, a water contentstrength parameter equivalent layered calculation model for saline soil subgrade was established, and the change law of soil sample matrix suction with volumetric water content was measured by volume pressure plate test. By combining the finite element analysis of saturated/unsaturated seepage and the limit equilibrium analysis of the stability of the roadbed slope, the SLOPE/W module in GeoStudio was used to calculate and analyze the operating conditions of rainfall intensity and rainfall duration influence of saline soil subgrade slope stability. Considering the relationship function between the water content and the shear strength, the stabilities of the CL1 and CL2 saline soil slopes were analyzed through the establishment of an equivalent layered calculation model of the saline soil roadbed moisture contentstrength parameters. The results show that when the water content is increased by 3% on the basis of the optimal water content, the cohesion of CL1 and CL2 decreases by 94.3% and 54.0%, respectively, the internal friction angle does not change much. When the optimal water content is reduced by 3%, the cohesion of CL1 and CL2 are increased by 277.1% and 89.7%, respectively, compared with the optimal water content, which has little effect on the internal friction angle of CL2, the internal friction angle of CL1 has decreased significantly. When the rainfall intensity is the same, the safety factor of the roadbed filled with CL1 is more obvious than that of the roadbed filled with CL2. The main reason is that the high chloride is more hydrophilic than the sulfate and the shear strength parameters are more affected by changes in moisture. 3 tabs, 14 figs, 25 refs.

相似文献/References:

[1]武建民,祝伟,马士让,等.应用加权密切值法评价基质沥青抗老化性能[J].长安大学学报(自然科学版),2012,32(01):0.
[2]张宜洛,袁中山.SMA混合料结构参数的影响因素[J].长安大学学报(自然科学版),2012,32(01):0.
[3]陈璟,袁万杰,郝培文,等.微观指标对沥青热稳定性能的影响[J].长安大学学报(自然科学版),2012,32(01):0.
[4]周兴业,刘小滔,王旭东,等.基于轴载谱的沥青路面累计当量轴次换算[J].长安大学学报(自然科学版),2012,32(01):0.
[5]李祖仲,王伯禹,陈拴发,等.轴载对复合式路面应力吸收层荷载应力的影响[J].长安大学学报(自然科学版),2012,32(01):0.
[6]关博文,刘开平,陈拴发,等.水镁石纤维路面混凝土路用性能[J].长安大学学报(自然科学版),2012,32(01):0.
[7]翁效林,王玮,张留俊,等.拓宽路基荷载下管桩复合地基沉降变形模式[J].长安大学学报(自然科学版),2012,32(01):0.
[8]穆柯,王选仓,柳志军,等.基于非饱和渗流原理的路基含水率预估[J].长安大学学报(自然科学版),2012,32(01):0.
[9]李振霞,陈渊召.不同类型半刚性基层材料性能的试验与分析[J].长安大学学报(自然科学版),2012,32(01):0.
[10]马 骉,马 晋,周宇鹏.沥青混合料降温收缩断裂特性[J].长安大学学报(自然科学版),2012,32(03):1.
　MA Biao,MA Jin,ZHOU Yu-peng.Cooling shrinkage fracture characteristic of asphalt mixture[J].Journal of Chang’an University (Natural Science Edition),2012,32(3):1.
[11]平树江,李炜光,申爱琴,等.黄河中下游冲积平原细粒氯盐渍土的加固机理[J].长安大学学报(自然科学版),2008,28(04):21.
　PING Shu-jiang,LI Wei-guang,SHEN Ai-qin,et al.Reinforcement mechanism of fine chlorine saline soil on middle and lower alluvial plains of Yellow River[J].Journal of Chang’an University (Natural Science Edition),2008,28(3):21.
[12]李芳,李斌,陈建,等.中国公路盐渍土的分区方案[J].长安大学学报(自然科学版),2006,26(06):12.
　LI Fang,LI Bin,CHEN Jian.Highway-related dividing scheme of salty soil[J].Journal of Chang’an University (Natural Science Edition),2006,26(3):12.
[13]顾强康,屈　波,张仁义,等.硫酸盐渍土定量增湿盐胀特性试验[J].长安大学学报(自然科学版),2015,35(03):53.
　[J].Journal of Chang’an University (Natural Science Edition),2015,35(3):53.
[14]姚运仕,王嘉.盐渍土对泡沫轻质土强度及耐久性的影响[J].长安大学学报(自然科学版),2021,41(3):33.
　YAO Yun shi,WANG Jia.Effects of strength and durability of salted soil to foam lightweight soil[J].Journal of Chang’an University (Natural Science Edition),2021,41(3):33.

更新日期/Last Update: 2020-06-03