沿海软基大砂袋围堰的离心模型试验

doi:10.13722/j.cnki.jrme.2015.1547

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Abstract How to build a quick and safe cofferdam in sea is a difficult challenge in land reclamation engineering. A new method named“big sandbag cofferdam”is developed and applied in many projects. In this paper，a series of centrifugal model tests were conducted to investigate the behavior of the big sandbag cofferdam. The stress-strain of geotextile was get by using a flexible glue to paste the strain gauge. It was found that the big sandbags have a good integrity and strong adaption to ground deformation. The uneven settlement of soft foundation without wick drains was obvious，sandbags near the slope toe were in tension，and those under the road center were pressurized. For the cofferdam installed with wick drains，the magnitude of maximum tension of the sandbag was higher，and the distribution of tension in reinforcement was more localized under the toe of the cofferdam. The mobilization of the tension reaches around 86% of the tensile strength. The existence of wick drains increases the strength of the foundation during the period of cofferdam construction. It can contribute significantly towards the stability of the cofferdam.

Key words： soil mechanics soft soil foundation big sandbag cofferdam plastic drainage plate centrifugal model test

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	Articles by authors
	CHEN Lingwei1
	2
	ZHOU Xiaowen1
	GONG Biwei3
	LI Bo3
	TONG Jun3

Cite this article:

CHEN Lingwei1,2,ZHOU Xiaowen1, et al. Centrifugal modeling of big sandbag cofferdam on coastal soft soil[J]. , 2016, 35(S2): 4235-4240.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2015.1547 OR https://rockmech.whrsm.ac.cn/EN/Y2016/V35/IS2/4235

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