昆明湖相沉积地层Peck公式研究

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (1554 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract Research purposes: The Peck formula is one of the important methods for studying tunnel surface settlement. Its prediction results are mainly affected by parameters such as settlement groove width i and formation loss rate η, and due to the strong regional characteristics of each parameter, the parameter values vary greatly in different regions. Therefore, this paper takes the double line shield tunnel in the sedimentary strata of Kunming Lake as the research object, explores the variation rules and value distribution of each parameter, and finally obtains a surface settlement prediction formula for the double line tunnel applicable to the region, filling the research gap in China.
Research conclusions: (1) Due to the influence of the right line leading, the fitting degree of the Peck formula on the left line has decreased. (2) i is directly proportional to the tunnel depth z and can be characterized by the settlement groove width coefficient k. Its correlation with the weighted compression modulus E is weak. (3) η is positively correlated with z, negatively correlated with grouting rate g, and has little regularity with E. (4) The double line tunnel surface settlement prediction formula takes the leading tunnel k₁ [0.23,0.68], η₁ [0.31%, 1.66%], and the following tunnel k₂ [0.21,0.58], η₂ [0.31%, 1.79%]. (5) The rationality of the formula was verified by the measured data of a certain line, and the predicted results were basically consistent with the actual settlement, both located between the upper and lower limits. At the same time, based on the maximum settlement of the upper limit curve, it can be roughly judged whether the predicted settlement value exceeds the engineering warning, which can provide reference for safe construction of similar tunnels.

Key words： tunnel engineering Peck formula lacustrine sedimentary strata land subsidence settlement groove width formation loss rate

Received: 16 December 2022

PACS:

TU44

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	RUAN Yongfen
	QIU Long
	HUAI Yigao
	WU Long
	ZHENG Tianyong
	QIAO Wenjian

Cite this article:

RUAN Yongfen,QIU Long,HUAI Yigao, et al. Research on Peck Formula for Sedimentary Strata of Kunming Lake[J]. Journal of Railway Engineering Society, 2024, 41(11): 66-73.

URL:

https://tdgcxb.crec.cn/EN/ OR https://tdgcxb.crec.cn/EN/Y2024/V41/I11/66

[1]	丁智,许教明,何晨阳,等.含气地层双线盾构地表沉降实测分析[J].铁道工程学报,2022(11):88-93.Ding Zhi, Xu Jiaoming, He Chenyang, etc. Ground Settlement Analysis of a Double-line Shield in Hangzhou Gas-bearing Strata[J]. Journal of Railway Engineering Society, 2022(11): 88-93.
[2]	Peck R B.Deep Excavations and Tunneling in Soft Ground[J]. Proc. 7th ICSMFE, 1969, 1969: 225-290.
[3]	李方明,陈国兴.南京江漫滩区间隧道盾构施工地表沉降变形特性研究[J].铁道学报,2020(7):155-160.Li Fangming, Chen Guoxing.Study on Deformation Characteristics of Ground Surface Settlement During Shield Tunnel Construction of River Floodplain in Nanjing[J]. Journal of the China Railway Society, 2020(7): 155-160.
[4]	路林海,孙捷城,周国锋,等.黏性土地层曲线盾构施工地表沉降预测研究[J].铁道工程学报,2018(5):99-105.Lu Linhai, Sun Jiecheng, Zhou Guofeng, etc. Research on the Surface Deformation Prediction for Curved Shield Construction in Clay Stratum[J]. Journal of Railway Engineering Society, 2018(5): 99-105.
[5]	张建全,张克利,姚爱敏,等.基于实测数据的隧道地表沉降Peck经验参数研究[J].铁道工程学报,2023(3):89-95.Zhang Jianquan, Zhang Keli, Yao Aimin, etc. Peck Empirical Parameters of Tunnel Surface Settlement Based on Measured Data[J]. Journal of Railway Engineering Society, 2023(3): 89-95.
[6]	Burland J B, Mair R J, Standing J R.Ground Performance and Building Response due to Tunnelling[C]//Advances in Geotechnical Engineering: The Skempton Conference: Proceedings of a Three Day Conference on Advances in Geotechnical Engineering, Organised by the Institution of Civil Engineers and Held at the Royal Geographical Society, London, UK, on 29—31 March 2004. Thomas Telford Publishing, 2004: 291-342.
[7]	吴昌胜,朱志铎.不同隧道施工方法引起地层损失率的统计分析[J].浙江大学学报:工学版,2019(1):19-30.Wu Changsheng, Zhu Zhiduo.Statistical Analysis of Formation Loss Rate Caused by Different Tunnel Construction Methods[J]. Journal of Zhejiang University:Engineering Edition, 2019(1): 19-30.
[8]	Gang W E I. Prediction of Soil Settlement Caused by Double-line Parallel Shield Tunnel Construction[J]. Disaster Advances, 2013(6): 23-27.