地基沉降计算的困难与突破

杨光华

doi:10.11779/CJGE201910013

地基沉降计算的困难与突破 English Version

杨光华^{1, 2}

1. 广东省水利水电科学研究院,广东广州 510610;
2. 广东省岩土工程技术研究中心,广东广州 510610

基金项目: 国家自然科学基金项目（51778152,51378131）

详细信息

作者简介:
杨光华(1962—),男,广东罗定人,博士,教授级高级工程师,博士生导师,主要从事本构理论、基础工程、软土工程及基坑工程等方面的研究、设计及咨询工作。E-mail:1084242143@qq.com。

计量
- 文章访问数: 439
- HTML全文浏览量: 16
- PDF下载量: 451
出版历程
- 收稿日期: 2019-05-12
- 发布日期: 2019-10-24

Difficulties and breakthroughs in calculation of foundation settlement

YANG Guang-hua^{1, 2}

1. Guangdong Research Institute of Water Resources and Hydropower, Guangzhou 510610, China;
2. The Geotechnical Engineering Technology Center of Guangdong Province, Guangzhou 510610, China

摘要

摘要: 太沙基（Terzaghi）创立土力学理论已近百年,但土力学的两个最基本的问题也是工程设计应用最广的内容：地基沉降计算和承载力合理确定还没有很好的解决,以致土力学被称为是一门半理论半经验的“艺术”科学。问题的根源是什么?如何突破?能使理论更接近实际一点吗?这里介绍我们所做的一些工作和思考,就是分析沉降计算不准的原因是由于室内土样试验获得的参数与现场原位土试验获得的参数差异大,同时通常的沉降计算方法难以考虑土体应力水平产生的侧向变形引起的非线性沉降。建议对硬土地基采用原位压板试验建立的切线模量法计算地基的沉降,可以解决原位土参数和应力非线性的问题,对软土主要是解决应力非线性问题。对合理确定地基承载力,应该计算实际基础的荷载沉降曲线,由基础的荷载沉降曲线,用强度和变形双控的方法,才能合理的确定地基的承载力。希望抛砖引玉,共同努力,推进学科发展。
- 沉降计算 /
- 切线模量法 /
- 地基承载力
Abstract: Terzaghi has founded the theory of soil mechanics for nearly a hundred years, but the two most basic problems of soil mechanics are also the most widely used contents of engineering design, calculation of foundation settlement and reasonable determination of bearing capacity, have not been solved very well, so that the soil Mechanics is called a semi-theoretical and semi-experienced "art" science. What is the root of the problem? How to break through? Can the theory be closer to the reality? Here are some of the work and thoughts we have done. The reason why the settlement calculation is not accurate is because the parameters obtained by the indoor soil sample tests are different from those obtained by the in-situ soil tests. At the same time, the usual settlement calculation method is difficult to consider the nonlinear settlement caused by the lateral deformation caused by the soil stress level. The settlement of the foundation is proposed to be calculated by the tangent modulus method established by the in-situ plate loading test on the hard soil foundation, which can solve the problem of in-situ soil parameters and stress nonlinearity, and solve the stress nonlinear problem mainly for soft soils. In order to reasonably determine the bearing capacity of foundation, the load-settlement curve of actual foundation should be calculated, and the bearing capacity of foundations can be reasonably determined only by the load-settlement curve of foundation and the double-control method of strength and deformation. We hope that we can make joint efforts to promote the development of disciplines.
- settlement calculation /
- tangent modulus method /
- foundation bearing capacity

HTML全文

参考文献(15)

[1]	GB50007—2011 建筑地基基础设计规范[S]. 2012. (GB50007—2011 Code for design of building foundation[S]. 2012. (in Chinese))
[2]	DBJ15—31—2016建筑地基基础设计规范[S]. 2016. (DBJ15—31—2016 Design code for building foundation[S]. 2016. (in Chinese))
[3]	李广信. 高等土力学[M]. 北京: 清华大学出版社, 2002. (LI Guang-xin.Advanced soil mechanics[M]. Beijing: Tsinghua University Press, 2002. (in Chinese))
[4]	DAS B M.Shallow foundations: bearing capacity and settlement[M]. 2nd ed. California: CPC Press Taylor & Francis Group, 2009.
[5]	TERZAGHI K, PCK R P.Soil mechanics in engineering practce[M]. New York: John Wiley and Sons, 1948: 566.
[6]	焦五一. 地基变形计算的新参数——弦线模量的原理和应用[J]. 水文地质及工程地质, 1982(1): 30-33. (JIAO Wu-yi.Principle and application of chord modulus, a new parameter for foundation deformation calculation[J]. Hydrogeology and Engineering Geology, 1982(1): 30-33. (in Chinese))
[7]	张在明. 等效变形模量的非线性特性的分析[J]. 岩土工程学报, 1997, 19(5): 56-59. (ZHANG Zai-ming.Analysis of nonlinear characteristics of equivalent deformation modulus[J]. Chinese Journal of Geotechnical Engineering, 1997, 19(5): 56-59. (in Chinese))
[8]	杨光华. 地基非线性沉降计算的原状土切线模量法[J]. 岩土工程学报, 2006, 28(11): 1927-1931. (YANG Guang-hua.Nonlinear settlement computation of the soil foundation withthe undisturbed soil tangent modulus method[J]. Chinese Journal of Geotechnical Engineering, 2006, 28(11): 1927-1931. (in Chinese))
[9]	杨光华, 王鹏华, 乔有梁. 地基非线性沉降计算的原状土割线模量法[J]. 土木工程学报, 2007, 40(5): 49-52. (YANG Guang-hua, WANG Peng-hua, QIAO You-liang.An undisturbed-soil secant modulus method for calculation of nonlinear of soil foundation[J]. China Civil Engineering Journal, 2007, 40(5): 49-52. (in Chinese))
[10]	杨光华. 地基沉降计算的新方法[J]. 岩石力学与工程学报, 2008, 27(4): 679-686. (YANG Guang-hua.New computation method for soil foundation settlement[J]. Chinese Journal of Rock Mechanics and Engineering, 2008, 27(4): 679-686. (in Chinese))
[11]	杨光华, 张玉成, 张有祥. 变模量弹塑性强度折减法及其在边坡稳定分析中的应用[J]. 岩石力学与工程学报, 2009, 28(7): 1506-1512. (YANG Guang-hua, ZHANG Yu-cheng, ZHANG You-xiang. Application of variable modulus elastic-plate strength reduction method and its application in slope stability analysis[J]. Chinese Journal of Rock Mechanics and Engineering, 2009, 28(7): 1506-1512: (in Chinese))
[12]	杨光华, 姚丽娜, 姜燕, 等. 基于e-p曲线的软土地基非线性沉降的实用计算方法[J]. 岩土工程学报, 2015, 37(2): 242-249. (YANG Guang-hua, YAO Li-na, JIANG Yan, et al.Pratical method for calculation nonlinear settlement of soft ground based on e-p curve[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(2): 242-249. (in Chinese))
[13]	杨光华, 黄致兴, 李志云, 等. 考虑侧向变形的软土地基非线性沉降计算的简化法[J]. 岩土工程学报, 2017, 39(9): 1697-1704. (YANG Guang-hua, HUANG Zhi-xing, LI Zi-yun, et al.Simplified method for nonlinear settlement calculation in soft soils considering lateral deformation[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(9): 1697-1704. (in Chinese))
[14]	杨光华, 姜燕, 张玉成, 等. 确定地基承载力的新方法[J]. 岩土工程学报, 2014, 36(4): 597-603. (YANG Guang-hua, JIANG Yan, ZHANG Yu-cheng, et al.New method for determination of bearing capacity of soil foundation[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(4): 597-603. (in Chinese))
[15]	杨光华, 黄致兴, 姜燕, 等. 地基承载力的双控确定方法[J]. 岩土力学, 2016, 37(增刊2): 232-242. (YANG Guang-hua, HUANG Zhi-xing, JIANG Yan, et al.Double controlling method for determining bearing capacity of foundation soils[J]. Rock and Soil Mechanics, 2016, 37(S2): 232-242. (in Chinese))

施引文献

资源附件(0)

计量

文章访问数: 439
HTML全文浏览量: 16
PDF下载量: 451
被引次数: 0

地基沉降计算的困难与突破 English Version

作者简介: 杨光华(1962—),男,广东罗定人,博士,教授级高级工程师,博士生导师,主要从事本构理论、基础工程、软土工程及基坑工程等方面的研究、设计及咨询工作。E-mail:1084242143@qq.com。

计量

出版历程

Difficulties and breakthroughs in calculation of foundation settlement

计量

出版历程

目录

作者简介:
杨光华(1962—),男,广东罗定人,博士,教授级高级工程师,博士生导师,主要从事本构理论、基础工程、软土工程及基坑工程等方面的研究、设计及咨询工作。E-mail:1084242143@qq.com。