[1]司壹恒,刘干斌,周晔,等.静止土压力系数原位测试装置设计及应用研究[J].水文地质工程地质,2020,47(3):79-85.[doi:10.16030/j.cnki.issn.1000 -3665.201910019]
 SI Yiheng,LIU Ganbin,ZHOU Ye,et al.Design and application of an in -situ test device for the static earth pressure coefficient[J].Hydrogeology & Engineering Geology,2020,47(3):79-85.[doi:10.16030/j.cnki.issn.1000 -3665.201910019]
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静止土压力系数原位测试装置设计及应用研究()
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《水文地质工程地质》[ISSN:1000-3665/CN:11-2202/P]

卷:
47卷
期数:
2020年3期
页码:
79-85
栏目:
工 程 地 质
出版日期:
2020-05-15

文章信息/Info

Title:
Design and application of an in -situ test device for the static earth pressure coefficient
文章编号:
1000 -3665(2020)03 -0079 -07
作者:
司壹恒1刘干斌1周晔1叶荣华2张俊杰3
1.宁波大学岩土工程研究所,浙江 宁波315211;2.宁波市轨道交通集团有限公司,浙江 宁波315012;3.宁波冶金勘察设计研究股份有限公司,浙江 宁波315041
Author(s):
SI Yiheng1 LIU Ganbin1 ZHOU Ye1 YE Ronghua2 ZHANG Junjie3
1.Institution of geotechnical engineering, Ningbo University, Ningbo, Zhejiang315211, China;2.Ningbo Rail Transit Group Co., Ltd., Ningbo, Zhejiang315012, China; 3.Ningbo Metallurgical Investigation & Design Research Co., Ltd., Ningbo, Zhejiang315041, China
关键词:
软土土层静止土压力系数现场测试系数修正
Keywords:
soft soil layer earth pressure coefficient field test device coefficient correction
分类号:
TU413.1;TU415
DOI:
10.16030/j.cnki.issn.1000 -3665.201910019
摘要:
为了便捷地测得静止土压力系数,设计制作了一种静止土压力系数原位测试装置,介绍了该装置的结构及工作原理,并在宁波市轨道交通4号线东钱湖车辆段场地开展原位试验,获得了6个不同深度土层的静止土压力系数K0值及不同深度地层处K0值的时程变化曲线。将测试结果与目前常用的试验方法如经验公式法、扁铲侧胀试验法、三轴试验法的结果进行了对比分析,验证了静止土压力系数原位测试装置的可靠性以及测试结果的合理性。其次根据试验所得数据分析了几种试验方法的利弊,得出了常规试验方法会受到不同深度处土体性质差异以及取样过程中土体扰动程度的影响、在使用时需结合地层状况进行综合考虑进行取值的结论。最后通过修正上海地区扁铲侧胀实验对软土土层经验公式中的相关系数,得到了与实验所测数据相符的适用于宁波地区软土层的K0值计算公式。
Abstract:
In order to conveniently measure the value of the static earth pressure coefficient, a static earth pressure coefficient in -situ test device is designed and fabricated, and the structure and working principle of the device are introduced. The in -situ test is carried out on the site of the Dongqian Lake Depot of Ningbo Rail Transit Line No. 4, and the static earth pressure coefficient K0 of soil layers of six different depths and the time -history curve of K0 value at different depths are obtained. The test results are compared with those obtained with the commonly used test methods such as the empirical formula method, flat shovel lateral expansion test method and triaxial test method. The reliability of the in -situ test device for the static earth pressure coefficient and the rationality of the test results are verified. Based on the data obtained from the experiment, the advantages and disadvantages of several test methods are analyzed. The results indicate that the conventional test method will be affected by the difference of soil properties at different depths and the degree of soil disturbance during the sampling process. Finally, by modifying the correlation coefficient of the soft soil layer experience formula in the flat shovel side expansion test in the Shanghai area, the K0 value calculation formula applicable to the soft soil layer in the Ningbo area is obtained, which is consistent with the experimental data. It is suggested that in other areas localized under the stratum condition, the K0 value calculation method which is consistent with the data measured by the in -situ test in this area is obtained by modifying the coefficients in the original empirical formulas of each region.

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备注/Memo

备注/Memo:
收稿日期: 2019 -10 -13; 修订日期: 2019 -11 -06
基金项目: 宁波市科技计划项目资助(2019C50013)
第一作者: 司壹恒(1997 -),男,硕士研究生,主要从事岩土与地下结构研究。E -mail: siyihengsd@163.com
更新日期/Last Update: 2020-05-15