跨软弱夹层地下连续墙槽壁局部稳定性分析

Abstract
Figure/Table
References
Related Citation (12)

Download: PDF (1014 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract Research purposes: The instability of trench wall of diaphragm wall can be divided into overall instability and local instability. The construction of diaphragm wall through the weak interlayer is easy to induce the local instability. In order to study the local instability mechanism of trench wall during trench construction of diaphragm wall crossing weak interlayer, the disturbance range of trench construction is determined by using the trace of minimum principal stress of trench wall, the calculation model of local instability of trench wall is constructed, and the expression of local stability safety coefficient of trench wall is deduced based on plastic limit failure theory.
Research conclusions: (1)The theoretical solution of the local safety factor of diaphragm wall obtained in this paper is consistent with the field ultrasonic detection results, which can be used to quantitatively analyze the local stability of the trench wall of diaphragm wall; (2) The length of soil arch can be approximately taken as the length of trench section, and the height of soil arch is positively correlated with the length of trench section and the internal friction angle of soil; (3) The local stability of the trench wall is directly proportional to the thickness, cohesion, and internal friction angle of the weak interlayer, and inversely proportional to the length of the trench, surface load and underground water level; (4) The research results have important guiding significance for the design and construction of diaphragm wall across weak interlayer.

Key words： diaphragm wall weak interlayer local instability of trench wall theoretical analysis stability analysis

Received: 20 August 2021

PACS:

TU472

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	AN Chenliang
	WU Wenliang
	ZHAO Xiaopeng
	LIU Binghua
	YAN Xinyong
	WANG Daoyuan

Cite this article:

AN Chenliang,WU Wenliang,ZHAO Xiaopeng, et al. Local Stability Analysis of Diaphragm Wall Trench Wall Crossing Weak Interlayer[J]. Journal of Railway Engineering Society, 2022, 39(3): 7-12.

URL:

https://tdgcxb.crec.cn/EN/ OR https://tdgcxb.crec.cn/EN/Y2022/V39/I3/7

[1]	欧明喜,戴志峰,陈颖辉,等.地下连续墙黏性土夹砂层槽壁稳定性分析[J]. 防灾减灾工程学报,2020(4):537-542.Ou Mingxi,Dai Zhifeng, Chen Yinghui, etc. Trench Stability Analysis of Diaphragm Wall in Cohesive Soil Sandwiched Sand[J].Journal of Disaster Prevention and Mitigation Engineering,2020(4):537-542.
[2]	刘杨,刘维,史培新,等. 超地下连续墙成槽富水软弱局部失稳理论研究[J]. 岩土力学,2020(1):10-18.Liu Yang,Liu Wei,Shi Peixin, etc. Local Instability Analysis of the Ultra-deep Wall-to-slotted in Water Rich Soft Layer[J].Rock and Soil Mechanics,2020 (1):10-18.
[3]	金亚兵.地连墙槽壁加固稳定性计算方法研究[J]. 岩土力学:2017(1):305-312.Jin Yabing. Study of Stability Calculation Method of Trench Face Reinforcement of Diaphragm Wall[J].Rock and Soil Mechanics,2017(1):305-312.
[4]	Fox P J. Analytical Solutions for Stability of Slurry Trench[J]. Journal of Geotechnical and Geoenvironmental Engineering,ASCE,2004(7):749-758.
[5]	Han C Y, Wang J H. Limit Analysis for Local and Overall Stability of a Slurry Trench in Cohesive Soil[J]. International Journal of Geomechanics,ASCE,2015,(5):06104026.
[6]	Tsai J S,Chang C C,Jou L D. Lateral Extrusion Analysis of Sandwichen Weak Soil in Slurry Trench[J].Journal of Geotechnical and Geo-environmental Engineering,1998(11):1082-1090.
[7]	Handy R L. The Arch in Soil Arching[J].Journal of Geotechnical Engineering, 1985(3):302-318.
[8]	Huder J. Stability of Bentonite Slurry Trenches with Some Experiences in Swiss Practive[C]//Proc.,5th Eur. Conf. on Soil Mech. and Found.Engrg,Madrid,Vol.Ⅳ-9,517-522.