直斜交替组合钢管桩支挡结构试验研究

doi:10.13722/j.cnki.jrme.2022.1043

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Abstract As a new retaining structure for excavations，alternating combination of vertical and incline steel pipe piles has many advantages，such as convenient construction，recyclable and low cost. The previous engineering practices have proved the good supporting performance，but there is a lack of systematic and in-depth understanding of its deformation and stress mechanism. In this study，cantilever pile and two alternating steel pipe piles with angles ? of 10° and 20°，respectively，were investigated using model experiment. The pile top displacement change law，pile body bending moment and deformation，and soil pressure distribution characteristics were analyzed in the process of foundation pit excavation. The test results show that with the same excavation depth of foundation pit，the top displacement of straight inclined alternating combination steel pipe pile decreases with the increasing angle ?，and the displacement of cantilever pile top is the largest. The bending moment diagram of cantilever pile shows the distribution characteristics of “fish belly”，while the alternating steel pipe is “S” type. The alternating combination of steel pipe has significant bending phenomenon，and the maximum bending moment of the pile body decreases with the increase of the angle ?. Under the action of soil pressure，the force of straight inclined alternating combination steel pipe pile is more reasonable. The inclined pile is pulled and the straight pile is pressed. The damage mode changes from the curved shear failure of cantilever pile to the pull failure of inclined pile and straight pile. In addition，the alternating combination of steel pipe pile supporting structure has three beneficial effects：anchor pulling effect，gravity effect and space structure effect. The pulling anchor effect and the gravity effect increase the anti-overturning moment of the structure，while the space structure effect improves the stiffness of the support structure. Therefore，the support structure has a good promotion and application value.

Key words： pile foundation alternating combination of vertical and incline steel pipe piles experimental study earth pressure deformation of pile

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	Articles by authors
	GAN Fei1
	2
	ZHENG Gang2
	CAO Teng1
	ZHOU Haizuo2
	JIANG Zhiheng1
	LI Meilin1
	BI Jing1
	LI Yalin3

Cite this article:

GAN Fei1,2,ZHENG Gang2, et al. Experimental study on retaining structure of alternating combination of vertical and incline steel pipe piles[J]. , 2023, 42(5): 1175-1187.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2022.1043 OR https://rockmech.whrsm.ac.cn/EN/Y2023/V42/I5/1175

[1] 郑刚，朱合华，刘新荣，等. 基坑工程与地下工程安全及环境影响控制[J]. 土木工程学报，2016，49(6)：1–24.(ZHENG Gang，ZHU Hehua，LIU Xinrong，et al. Control of safety of deep excavations and underground engineering and its impact on surrounding environment[J]. China Civil Engineering Journal，2016，49(6)：1–24.(in Chinese))
[2] MU L，HUANG M. Small strain based method for predicting three-dimensional soil displacements induced by braced excavation[J]. Tunnelling and Underground Space Technology，2016，52：12–22.
[3] LIAO H J，LIN C C. Case studies on bermed excavation in Taipei silty soil[J]. Canadian Geotechnical Journal，2009，46(8)：889–902.
[4] 郑刚，王玉萍，程雪松，等. 基坑倾斜桩支护性能及机制大型模型试验研究[J]. 岩土工程学报，2021，43(9)：1 581–1 591.(ZHENG Gang，WANG Yuping，CHENG Xuesong. et al. Large-scale model tests on performance and mechanism of inclined retaining structures of excavations[J]. Chinese Journal of Geotechnical Engineering，2021，43(9)：1581–1 591.(in Chinese))
[5] 郑刚，何晓佩，周海祚，等. 基坑斜–直交替支护桩工作机制分析[J]. 岩土工程学报，2019，41(增1)：97–100.(ZHENG Gang，W HE Xiaopei，ZHOU Haizuo，et al. Working mechanism of inclined-vertical retaining piles in excavations[J]. Chinese Journal of Geotechnical Engineering，2019，41(Supp.1)：97–100.(in Chinese))
[6] 郑刚，王玉萍，程雪松，等. 倾斜桩支护结构的工作性能和基坑稳定性[J]. 厦门大学学报：自然科学版，2021，60(1)：115–123.(ZHENG Gang，WANG Yuping，CHENG Xuesong，et al. Working performance and stability of excavation retained by inlined retaining structures[J]. Journal of Xiamen University：Natueal Science，2021，60(1)：115–123.(in Chinese))
[7] 郑刚. 软土地区基坑工程变形控制方法及工程应用[J]. 岩土工程学报，2022，44(1)：1–36.(ZHENG Gang. Method and application of deformation control of excavations in soft ground[J]. Chinese Journal of Geotechnical Engineering，2022，44(1)：1–36.(in Chinese))
[8] 郑刚，程雪松，周海祚，等. 岩土与地下工程结构韧性评价与控制[J]. 土木工程学报，2022，55(7)：1–38.(ZHENG Gang，Cheng Xuesong，ZHOU Haizuo，et al. Resilient evaluation and control of geotechnical and underground engineering structures[J]. China Civil Engineering Journal，2022，55(7)：1–38.(in Chinese))
[9] ZHENG G，NIE D，DIAO Y，et al. Numerical and experimental study of multi-bench retained excavations[J]. Geomechanics and Engineering，2017，13(5)：715–742.
[10] 郑刚，聂东清，刁钰，等. 基坑多级支护破坏模式研究[J]. 岩土力学，2017，38(增1)：313–322.(ZHENG Gang，NIE Dongqing，DIAO Yu，et al. Research on failure mode of multi-stage foundation pit support[J]. Rock and Soil Mechanics，2017，38(Supp.1)：313–322.(in Chinese))
[11] 郑刚，聂东清，程雪松，等. 基坑分级支护的模型试验研究[J]. 岩土工程学报，2017，39(5)：784–794.(ZHENG Gang，NIE Dongqing，CHENG Xuesong，et al. Research on model test of graded foundation pit support[J]. Chinese Journal of Geotechnical Engineering，2017，39(5)：784–794.(in Chinese))
[12] 郑刚，白若虚. 倾斜单排桩在水平荷载作用下的性状研究[J]. 岩土工程学报，2010，32(增1)：39–45.(ZHENG Gang，BAI Ruoxu. Research on the behavior of inclined single row pile under horizontal load[J]. Chinese Journal of Geotechnical Engineering，2010，32(Supp.1)：39–45.(in Chinese))
[13] 王恩钰，周海祚，郑刚，等. 基坑倾斜桩支护的变形数值分析[J]. 岩土工程学报，2019，41(增1)：73–76.(WANG Enyu，ZHOU Haizuo，ZHENG Gang，et al. Numerical analyses of deformation of inclined pile-retained excavations[J]. Chinese Journal of Geotechnical Engineering，2019，41(Supp.1)：73–76.(in Chinese))
[14] 周海祚，郑刚，何晓佩，等. 基坑倾斜桩支护稳定特性及分析方法研究[J]. 岩土工程学报，2022，44(2)：271–277.(ZHOU Haizuo，ZHENG Gang，HE Xiaopei，et al. Stability characteristics and analysis method for inclined retaining walls in excavations[J]. Chinese Journal of Geotechnical Engineering，2022，44(2)：271–277.(in Chinese))
[15] 刁钰，苏奕铭，郑刚. 主动式斜直交替倾斜桩支护基坑数值研究[J]. 岩土工程学报，2019，41(增1)：162–164.(DIAO Yu，SU Yiming，ZHENG Gang. Numerical study on oblique-straight alternate piles for active support of excavations[J]. Chinese Journal of Geotechnical Engineering，2019，41(Supp.1)：162–164.(in Chinese))
[16] 刘畅，马力遥，郑刚，等. 斜直交替基坑支护桩现场实测及机理研究[J]. 岩土工程学报，2022，44(5)：827–834.(LIU Chang，MA Liyao，ZHENG Gang，et al. Field measurement and mechanism study of inclined vertical alternate supporting pile in foundation pits[J]. Chinese Journal of Geotechnical Engineering，2022，44(5)：827–834.(in Chinese))
[17] ZHENG G，LIU，Z P，ZHOU H Z et al. Behaviour of an outward inclined-vertical framed retaining wall of an excavation[J]. Acta Geotech，2022，DOI：https：//doi.org/10.1007/s11440–022–01571–z.
[18] 李广信，张丙印，于玉贞. 土力学[M]. 北京：清华大学出版社，2013：218–235.(LI Guangxin，ZHANG Bingyin，YU Yuzhen. Soil mechanics[M]. Beijing：Tsinghua University Press，2013：218–235.(in Chinese))
[19] 顾慰慈. 土压力和挡土墙计算简明手册[M]. 北京：中国水利水电出版社，2018：378–380.(GU Weici. Concise handbook of earth pressure and retaining wall calculations[M]. Beijing：China Water and Power Press，2018：378–380.(in Chinese))