基于原位旁压试验的切线模量法及其初步验证

温勇; 杨光华; 汤连生; 李志云; 黄致兴; 张玉成

doi:10.11779/CJGE2017S1024

基于原位旁压试验的切线模量法及其初步验证 English Version

温勇^1,2,3,
杨光华^2,3,4,
汤连生^1, ,,
李志云⁴,
黄致兴⁴,
张玉成^2,3

1. 中山大学地球科学与工程学院,广东广州 510275;
2. 广东省水利水电科学研究院,广东广州 510610;
3. 广东省岩土工程技术研究中心,广东广州 510610;
4. 华南理工大学土木与交通学院,广东广州 510641

基金项目: 国家自然科学基金项目（51378131,41572277）; 广东省自然科学基金项目（2015A030313118）; 广东省岩土工程技术研究中心开放基金项目（201404002）

详细信息

作者简介:
温勇(1987-),男,江西吉安人,博士后,副研究员,主要从事土的本构理论、土的原位测试、地基基础工程等方面的研究工作。E-mail:wy876633@163.com。

通讯作者:
汤连生，E-mail：eestls@mail.sysu.edu.cn

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出版历程
- 收稿日期: 2016-11-27
- 发布日期: 2017-11-19

Tangent modulus method based on in-situ pressuremeter tests and its preliminary validation

1. School of Earth Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, China;
2. Guangdong Research Institute of Water Resources and Hydropower, Guangzhou 510610, China;
3. Geotechnical Engineering Technology Center of Guangdong Province, Guangzhou 510610, China;
4. School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510641, China

摘要

摘要: 切线模量法根据原位压板载荷试验求取不同荷载水平下土体的切线模量,并将其应用于分层总和法进行地基沉降计算,较好地克服了通常取样扰动的不利影响,并能够反映地基沉降的非线性,是目前地基沉降计算中较实用有效的方法之一。而其不足之处则是原位压板试验工作量大、时间长,且难以反映深部土体的特性;相比而言,旁压试验设备轻便、测试时间短,且可在不同深度的土层进行测试,可以算是一种简单实用的原位试验。因此,为了进一步发展和完善切线模量法,本文探讨了利用原位旁压试验获取切线模量法计算参数的方法,并通过位于美国Texas A&M University河滨校区的粉细砂地基上4个不同压板尺寸载荷试验结果,检验了其可行性。结果表明：4个不同压板尺寸载荷试验的沉降计算结果与试验结果具有较好的一致性,初步验证了基于原位旁压试验的切线模量法的可行性。
- 地基沉降 /
- 切线模量法 /
- 原位旁压试验 /
- 砂土地基
Abstract: The tangent modulus method is a method which is based on the plate loading tests to obtain the tangent modulus of the soil under different load levels, and uses the tangent modulus into the layer-wise summation method for calculating foundation settlement. It is one of the best methods for settlement calculations at present, which can overcome the adverse effects of sampling disturbance and reflect the nonlinearity of foundation settlement. However, the deficiency of the tangent modulus method based on the plate loading tests is that the plate loading tests need a heavy workload and cannot reflect the characteristics of soil in deep layers. While, compared with the plate loading tests, the pressuremeter tests take the advantages of simple operation and can test the soil with different depths, which can be said as simple and practical in-situ tests. Therefore, in order to further develop the tangent modulus method, one method in which the pressuremeter tests are used to obtain the parameters of the tangent modulus method is studied, and its feasibility is verified by the results of four plate loading tests with different sizes, which are tested in one fines sand foundation of Texas A&M University riverside campus. The results show that the calculated results of settlement curve of four plate loading tests with different sizes agree with the experimental ones, which preliminarily verifies the feasibility of the tangent modulus method based on the in-situ pressuremeter tests.
- foundation settlement /
- tangent modulus method /
- in-situ pressuremeter test /
- sand foundation

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参考文献(19)

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