挡墙平动模式下邻近长-短桩复合地基基坑土压力试验研究

郭院成; 谷少闯; 魏艳卿; 李明宇

doi:10.13204/j.gyjzG21042505

挡墙平动模式下邻近长-短桩复合地基基坑土压力试验研究

doi: 10.13204/j.gyjzG21042505

1. 郑州大学土木工程学院, 郑州 450001;
2. 洛阳理工学院土木工程系, 河南洛阳 471000

基金项目:

国家自然科学基金项目(51908513)。

详细信息

作者简介:
郭院成,男,1965年出生,博士,教授,博士研究生导师。

通讯作者:
谷少闯,男,1995年出生,硕士研究生,gushaochuang@qq.com。

计量
- 文章访问数: 67
- HTML全文浏览量: 17
- PDF下载量: 2
- 被引次数: 0
出版历程
- 收稿日期: 2021-04-25
- 网络出版日期: 2022-07-23
- 刊出日期: 2022-07-23

Experimental Study on the Lateral Earth Pressure of Translational Retaining Structures Adjacent to Composite Foundation of Long-Short Piles

1. School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China;
2. Department of Civil Engineering, Luoyang Institute of Science and Technology, Luoyang 471000, China

摘要

摘要: 针对邻近长短桩复合地基基坑土压力,通过室内模型试验,研究邻近长-短桩复合地基基坑开挖过程中,随着基坑侧壁水平位移的发展,基坑土压力分布曲线的变化规律。研究表明:挡墙发生位移时,短桩加固深度范围内,邻近长-短桩复合地基挡墙土压力小于天然地基条件下的土压力,短桩桩端下部挡墙土压力则显著大于天然地基条件下的土压力;在计算邻近长-短桩复合地基挡墙土压力时需考虑短桩桩端附加荷载的影响;邻近长-短桩复合地基条件下的基坑土压力可近似等效为桩间土附加应力、短桩附加应力与长桩附加应力分别产生的基坑土压力的代数和,据此建立了邻近长-短桩复合地基基坑土压力的简化计算方法。
- 基坑工程 /
- 土压力 /
- 长-短桩复合地基 /
- 试验研究
Abstract: A model test was conducted to analyze the lateral earth pressure behind a translating retaining structure near an existing composite foundation of long-short piles. The results showed that when the retaining structure was translated outward, the lateral earth pressure behind the retaining structure adjacent to composite foundation of long-short piles was less than that in the natural foundation within the depth of reinforced by short piles. However, the earth pressure below the bottom of reinforcing short piles was significantly larger than that in natureal foundation. It was suggestion that the influence of the additional load transferred from the short piles should be taken into account in calculation of lateral earth pressure behind a retaining structure. It was also found that the lateral earth pressure adjacent to composite foundation with long-short piles could approximately be equivalent to the algebraic sum of the earth pressure caused by additional stress in soil between piles and additional stress from the short and long piles respectively. Based on that, a formula for calculating the lateral earth pressure behind a retaining structure adjacent to composite foundation with long and short piles was proposed.
- foundation excavation engineering /
- earth pressure /
- composite foundation with long-short piles /
- experimental study

HTML全文

参考文献(17)

[1]	佟建兴,闫明礼,王明山,等.刚性桩复合地基侧向土压力试验研究[J].岩土力学,2014,35(6):1572-1578.
[2]	BANG S. Active earth pressure behind retaining walls[J]. Journal of Geotechnical Engineer, 1985,111(3):407-412.
[3]	CHANG M F. Lateral earth pressures behind rotating walls[J]. Canadian Geotechnical Journal, 1997, 34(4):498-509.
[4]	PAIK K H, SALGADO R.Estimation of active earth pressure against rigid retaining walls considering arching effects[J]. Geotechnique, 2003, 53(7):643-653.
[5]	KHOSRAVI M H, PIPATPONGSA T, TAKEMURA J. Experimental analysis of earth pressure against rigid retaining walls under translation mode[J]. Géotechnique, 2013, 63(12):1020-1028.
[6]	LI J P, WANG M.Simplified method for calculating active earth pressure on rigid retaining walls considering the arching effect under translational mode[J].International Journal of Geomechanics, 2014, 14(2):282-290.
[7]	GRECO V. Active thrust on retaining walls of narrow backfill width[J]. Computers and Geotechnics, 2013, 50:66-78.
[8]	应宏伟,张金红,王小刚,等.有限土体刚性挡墙平动模式被动土压力试验研究[J].岩土工程学报,2016,38(6):978-986.
[9]	CHEN J J, LI M G, WANG J H.Active earth pressure against rigid retaining walls subjected to confined cohe-sionless soil[J]. International Journal of Geomechanics, 2017, 17(6).
[10]	TAKE W A, VALSANGKAR A J.Earth pressures on unyielding retaining walls of narrow backfill width[J]. Canadian Geotechnical Journal, 2001, 38(6):1220-1230.
[11]	LI L, AUBERTIN M, BELEM T.Formulation of a three dimensional analytical solution to evaluate stresses in backfilled vertical narrow openings[J]. Canadian Geotech-nical Journal, 2005, 42(6):1705-1717.
[12]	秦素贞.既有建筑复合地基对基坑土压力的影响研究[D].郑州:郑州大学,2012.
[13]	吉庆祥.既有建筑复合地基对邻近基坑性状影响的研究[D].太原:太原理工大学,2014.
[14]	白璐.复合地基邻近基坑支护结构侧压力计算研究[D].济南:山东大学,2019.
[15]	中华人民共和国住房和城乡建设部.土工试验方法标准:GB/T 50123-2019[S].北京:中国计划出版社,2019.
[16]	中华人民共和国住房和城乡建设部.复合地基技术规范:GB/T 50783-2012[S].北京:中国计划出版社,2012.
[17]	杨斌,胡立强.挡土结构侧土压力与水平位移关系的试验研究[J].建筑科学, 2000, 16(2):14-20.