石英砂地基中X截面混凝土樁筏基礎(chǔ)的豎向承載力模型試驗(英文)
發(fā)布時間:2021-05-28 15:10
為了揭示X截面樁筏基礎(chǔ)在石英砂中的承載能力,將X截面樁與同截面積的圓形樁進行對比研究,開展了一系列模型試驗。研究內(nèi)容包括X截面樁筏基礎(chǔ)的荷載-沉降曲線、軸力和摩阻力、X截面樁凹凸邊緣的應變分析、樁-土應力比、樁側(cè)阻力和端部承載力的分布。結(jié)果表明:X截面樁筏基礎(chǔ)的承載力遠遠大于圓形樁筏基礎(chǔ)的承載力。筏板下的X截面樁軸力峰值比圓形樁的軸力峰值小且位置更深;因而,中性點位置也比圓形樁更深。此外,X截面樁的凹緣處應變遠大于凸緣處,且隨著荷載的增大,凸緣處具有更大的承載力潛能。與圓截面樁相比,X截面樁具有更高的樁-土應力比,更大的側(cè)阻力與端阻力荷載分擔比。因此,X截面樁可以顯著提高砂土中樁筏基礎(chǔ)的承載力。
【文章來源】:Journal of Central South University. 2020,27(06)EISCICSCD
【文章頁數(shù)】:9 頁
【文章目錄】:
1 Introduction
2 Model tests
2.1 Model test equipment
2.2 Model pile and sand
3 Model test results and discussion
3.1 P-S curves of circular and X-section concrete pile raft foundation
3.2 Influence of pile numbers on P-S curves
3.3 Axial force and skin friction
3.4 Strain on concave and convex edge of X-section concrete pile
3.5 Pile-sand stress ratio and load-sharing
3.6 Distributions of side and tip resistance
4 Conclusions
【參考文獻】:
期刊論文
[1]石灰加固貝寧(西非)土的性能及滑坡防控(英文)[J]. Quirin Engelbert Ayeditan ALAYE,LING Xian-zhang,Yvette Sèdjro KIKI TANKPINOU,Marx Ferdinand AHLINHAN,LUO Jun,Michel Hadilou ALAYE. Journal of Central South University. 2019(11)
[2]石柱與顆粒覆蓋增強土壤的實驗研究(英文)[J]. Nima MEHRANNIA,Farzin KALANTARY,Navid GANJIAN. Journal of Central South University. 2018(04)
[3]Numerical simulation on behavior of pile foundations under cyclic axial loads[J]. 趙明華,衡帥,鄭玥. Journal of Central South University. 2017(12)
[4]現(xiàn)澆X形混凝土樁豎向承載特性試驗及其極限承載力預測[J]. 張敏霞,丁選明,陳育民. 煤炭學報. 2011(02)
[5]現(xiàn)澆X形樁豎向承載特性足尺模型試驗研究[J]. 王智強,劉漢龍,張敏霞,袁佶,雍君. 巖土工程學報. 2010(06)
本文編號:3208271
【文章來源】:Journal of Central South University. 2020,27(06)EISCICSCD
【文章頁數(shù)】:9 頁
【文章目錄】:
1 Introduction
2 Model tests
2.1 Model test equipment
2.2 Model pile and sand
3 Model test results and discussion
3.1 P-S curves of circular and X-section concrete pile raft foundation
3.2 Influence of pile numbers on P-S curves
3.3 Axial force and skin friction
3.4 Strain on concave and convex edge of X-section concrete pile
3.5 Pile-sand stress ratio and load-sharing
3.6 Distributions of side and tip resistance
4 Conclusions
【參考文獻】:
期刊論文
[1]石灰加固貝寧(西非)土的性能及滑坡防控(英文)[J]. Quirin Engelbert Ayeditan ALAYE,LING Xian-zhang,Yvette Sèdjro KIKI TANKPINOU,Marx Ferdinand AHLINHAN,LUO Jun,Michel Hadilou ALAYE. Journal of Central South University. 2019(11)
[2]石柱與顆粒覆蓋增強土壤的實驗研究(英文)[J]. Nima MEHRANNIA,Farzin KALANTARY,Navid GANJIAN. Journal of Central South University. 2018(04)
[3]Numerical simulation on behavior of pile foundations under cyclic axial loads[J]. 趙明華,衡帥,鄭玥. Journal of Central South University. 2017(12)
[4]現(xiàn)澆X形混凝土樁豎向承載特性試驗及其極限承載力預測[J]. 張敏霞,丁選明,陳育民. 煤炭學報. 2011(02)
[5]現(xiàn)澆X形樁豎向承載特性足尺模型試驗研究[J]. 王智強,劉漢龍,張敏霞,袁佶,雍君. 巖土工程學報. 2010(06)
本文編號:3208271
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