| 黄河冲积层静止土压力系数原位测定与分析 |
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| 引用本文： | 王国富,曹正龙,路林海,王蓉,王丹,韩帅.黄河冲积层静止土压力系数原位测定与分析[J].岩土力学,2018,39(10):3900-3906. |
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| 作者姓名： | 王国富 曹正龙 路林海 王蓉 王丹 韩帅 |
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| 作者单位： | 1. 济南轨道交通集团有限公司，山东 济南 250101；2. 山东省地矿工程勘察院，山东 济南 250050 |
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| 基金项目： | 山东省自然科学基金（No. ZR2017MEE065）；济南市优秀创新团队(No. 济政字[2016]40号)；济南市社会民生重大专项(No. 201704140)。 |
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| 摘 要： | 静止土压力系数K0与其他物理力学性质相互制约，变化特征复杂，加之试验条件、理论假设条件不同，表达形式多样，结果迥异。依托济南地铁工程勘察，采用原位土体水平压力测定仪（KSB）对济南西北部黄河厚冲积层现场测试，将测试结果与原位旁压试验、室内侧压力仪K0试验结果，以及考虑黏性土内摩擦角、塑性指数的K0计算公式进行对比，分析表明：KSB测试结果以指数形式插值推算原位静止土压力系数更优；20 m深度范围内黄河冲积层黏性土可近似为正常固结饱和状态，K0介于0.4～0.7之间并随埋深减小，而Jaky公式计算值偏高，室内土工试验K0值偏低；以固结快剪内摩擦角 或等效内摩擦角 修正Jaky公式的计算结果更接近KSB实测值。
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| 关 键 词： | 黏性土 静止土压力系数 原位测试 内摩擦角 |
| 收稿时间： | 2016-12-29 |
Measurement and analysis about coefficient of earth pressure at rest in alluvium of the Yellow river |
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| WANG Guo-fu,CAO Zheng-long,LU Lin-hai,WANG Rong,WANG Dan,HAN Shuai.Measurement and analysis about coefficient of earth pressure at rest in alluvium of the Yellow river[J].Rock and Soil Mechanics,2018,39(10):3900-3906. |
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| Authors: | WANG Guo-fu CAO Zheng-long LU Lin-hai WANG Rong WANG Dan HAN Shuai |
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| Institution: | 1. Jinan Rail Transit Group Co., Ltd., Jinan, Shandong 250101, China; 2. Shandong Provincial Geo-mineral Engineering Exploration Institute, Jinan, Shandong 250050, China |
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| Abstract: | Earth pressure coefficient at rest of soil, K0, varies due to different stress conditions. Besides, it interacts with other physical and mechanical properties of the soils. Based on the geological survey of Jinan subway project, the horizontal pressure of the thick alluvial cohesive soil from Yellow River in northwest of Jinan was tested by the in-situ soil pressure tester, K0 stepped blade (KSB). To verify the test results, other test methods are also adopted, such as the lateral loading test, indoor K0 test by side pressure gauge as well as common calculation formula taking internal friction angle and plasticity index of cohesive soil into consideration. According to the comparative analysis of the results by different methods, the results can be obtained as follows. In the form of exponential interpolation, test results from KSB are superior in presuming the in-situ earth pressure coefficient at rest. The cohesive soil in the Yellow River alluvial layer can be approximately in normal consolidation saturated state inside the range of 0-20 m. K0 changes between 0.4 to 0.7 and decreases with the increase of depth. The value of K0 is on the high side with Jaky formula’s result and on the low side with indoor test. The calculation results obtained by Jaky formula are close to that of measured by KSB when introduce equivalent angle of internal friction and internal friction angle obtained by consolidated quick shear test. |
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| Keywords: | cohesive soil coefficient of earth pressure at rest in-situ test internal friction angle |
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